Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically ~~and posted on its corporate Web site, if any,~~ every Interactive Data File required to be submitted ~~and posted~~ pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit ~~and post~~ such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of October ~~23, 2017,~~24, 2018, there were ~~10,118,659~~57,369,283 shares of the registrant’s Common Stock outstanding.

							September 30,			December 31,
	September 30,			December 31,			2018			2017
	2017			2016			(Unaudited)			(Note 1)
	(Unaudited)			(Note 1)
Assets
Current assets:
Cash and cash equivalents	$	12,079		$	44,678		$	32,327		$	13,700
Restricted cash		-			2,000
Short-term investments		459			8,860			81,254			479
Accounts receivable, net		10,582			11,172			21,689			20,793
Inventory, net		29,985			21,195			24,366			26,993
Prepaid and other current assets		2,887			4,187			3,035			2,191
Total current assets		55,992			92,092			162,671			64,156
Restricted cash—long-term		10,000			-
Property and equipment, net		20,286			18,409			17,582			19,631
Patents, net		1,539			1,784			1,212			1,457
Restricted cash—long term								-			10,000
Other long-term assets		160			107			141			102
Total assets	$	87,977		$	112,392		$	181,606		$	95,346
Liabilities and stockholders’ deficit
Liabilities and stockholders’ equity (deficit)
Current liabilities:
Accounts payable	$	7,605		$	7,513		$	6,198		$	5,150
Accrued expense		2,536			1,629			3,931			2,832
Employee-related liabilities		11,413			10,183			17,229			14,488
Deferred revenue		2,295			5,208			3,703			2,526
Common stock warrants								20,643			5,432
Other current liabilities		5,562			6,943			6,846			5,657
Total current liabilities		29,411			31,476			58,550			36,085
Notes payable—long-term		75,596			78,960			-			76,541
Deferred rent—long-term		4,142			2,609			4,028			4,687
Other long-term liabilities		6,786			5,274			3,599			7,181
Total liabilities		115,935			118,319			66,177			124,494
Commitments and contingencies (Note 8)
Stockholders’ equity:
Common stock, $0.001 par value; 100,000 shares authorized as of September 30, 2017 and December 31, 2016, 5,487 and 3,110 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively.⁽¹⁾		55			31
Stockholders’ equity (deficit):
Common stock, $0.001 par value; 200,000 and 100,000 shares authorized as of September 30, 2018 and December 31, 2017, respectively. 57,364 and 10,119 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively.								57			10
Additional paid-in capital		438,194			398,623			719,148			448,455
Accumulated other comprehensive loss		-			(1	)		(13	)		—
Accumulated deficit		(466,207	)		(404,580	)		(603,763	)		(477,613	)
Total stockholders’ deficit		(27,958	)		(5,927	)
Total liabilities and stockholders’ deficit	$	87,977		$	112,392
Total stockholders’ equity (deficit)								115,429			(29,148	)
Total liabilities and stockholders’ equity (deficit)							$	181,606		$	95,346

See accompanying notes to unaudited condensed consolidated financial statements.

	Three Months Ended September 30,						Nine Months Ended September 30,						Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016			2018			2017			2018			2017
Sales	$	27,003		$	12,293		$	67,306		$	55,336		$	46,264		$	27,003		$	107,667		$	67,306
Cost of sales		15,131			13,870			40,680			41,809			24,468			15,131			59,381			40,680
Gross profit (loss)		11,872			(1,577	)		26,626			13,527
Gross profit														21,796			11,872			48,286			26,626
Operating expenses:
Selling, general and administrative		20,125			20,683			65,077			63,768			29,506			20,125			73,048			65,077
Research and development		4,914			6,154			14,910			14,464			7,999			4,914			20,430			14,910
Total operating expenses		25,039			26,837			79,987			78,232			37,505			25,039			93,478			79,987
Operating loss		(13,167	)		(28,414	)		(53,361	)		(64,705	)		(15,709	)		(13,167	)		(45,192	)		(53,361	)
Other income (expense), net:
Interest and other income		60			34			179			258			443			60			833			179
Interest and other expense		(2,928	)		(1,434	)		(8,445	)		(4,177	)		(1,401	)		(2,928	)		(7,585	)		(8,445	)
Loss on extinguishment of debt														(5,313	)		—			(5,313	)		—
Change in fair value of stock warrants														(12,265	)		—			(69,042	)		—
Total other expense, net		(2,868	)		(1,400	)		(8,266	)		(3,919	)		(18,536	)		(2,868	)		(81,107	)		(8,266	)
Net loss	$	(16,035	)	$	(29,814	)	$	(61,627	)	$	(68,624	)	$	(34,245	)	$	(16,035	)	$	(126,299	)	$	(61,627	)
Other comprehensive loss:
Unrealized gain (loss) on short-term investments	$	-		$	(6	)	$	1		$	(23	)	$	(19	)	$	—		$	(13	)	$	1
Comprehensive loss	$	(16,035	)	$	(29,820	)	$	(61,626	)	$	(68,647	)	$	(34,264	)	$	(16,035	)	$	(126,312	)	$	(61,626	)
Net loss per share, basic and diluted⁽¹⁾	$	(3.09	)	$	(9.73	)	$	(13.79	)	$	(22.52	)
Weighted average shares used to compute basic and diluted net loss per share⁽¹⁾		5,190			3,063			4,468			3,047
Net loss per share, basic and diluted													$	(0.62	)	$	(3.09	)	$	(2.81	)	$	(13.79	)
Weighted average shares used to compute basic and diluted net loss per share														55,615			5,190			44,993			4,468

See accompanying notes to unaudited condensed consolidated financial statements.

	Nine Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2018			2017
Operating activities
Net loss	$	(61,627	)	$	(68,624	)	$	(126,299	)	$	(61,627	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense		4,737			4,017			4,353			4,737
Interest expense related to amortization of debt discount and debt issuance costs		1,338			194			1,721			1,338
Provision for allowance for doubtful accounts		664			666			1,017			664
Provision for inventory reserve		316			1,805			397			316
Payment in kind interest accrual of notes payable		1,236			675			—			1,236
Amortization of discount on short-term investments		(16	)		(59	)
Change in fair value of common stock warrants								69,042			—
Amortization of premium (discount) on short-term investments								783			(16	)
Stock-based compensation expense		10,502			8,733			13,427			10,502
Loss on extinguishment of debt								5,313			—
Other		69			(37	)		155			69
Changes in operating assets and liabilities:
Accounts receivable, net		(73	)		5,191			(1,913	)		(73	)
Inventory, net		(9,038	)		(7,110	)		2,752			(9,038	)
Prepaid and other current assets		1,133			(1,408	)		(823	)		1,133
Other long-term assets		(53	)		(8	)		(39	)		(53	)
Accounts payable		522			291			1,083			522
Accrued expense		907			(144	)		1,098			907
Employee-related liabilities		797			(1,225	)		2,741			797
Deferred revenue		(4,137	)		8,528			1,178			(4,137	)
Other current liabilities		(601	)		1,348			1,100			(601	)
Deferred rent		(425	)		(566	)		(571	)		(425	)
Other long-term liabilities		(746	)		142			1,033			(746	)
Net cash used in operating activities		(54,495	)		(47,591	)		(22,452	)		(54,495	)
Investing activities
Purchase of short-term investments		—			(25,890	)		(100,550	)		—
Proceeds from sales and maturities of short-term investments		8,500			37,950			18,500			8,500
Purchase of property and equipment		(4,299	)		(6,187	)		(2,098	)		(4,299	)
Net cash provided by investing activities		4,201			5,873
Net cash provided by (used in) investing activities								(84,148	)		4,201
Financing activities
Issuance of notes payable, net of issuance costs		—			14,994
Restricted cash in connection with notes payable		(8,000	)		—
Principal payments on notes payable								(87,711	)		—
Proceeds from public offering, net of offering costs		25,125			—			172,929			25,125
Proceeds from issuance of common stock		570			1,592
Proceeds from exercise of warrants								29,536			—
Proceeds from common stock issued under employee benefit plans								473			570
Net cash provided by financing activities		17,695			16,586			115,227			25,695
Net decrease in cash and cash equivalents		(32,599	)		(25,132	)
Cash and cash equivalents at beginning of period		44,678			43,088
Cash and cash equivalents at end of period	$	12,079		$	17,956
Net increase (decrease) in cash and cash equivalents and restricted cash								8,627			(24,599	)
Cash and cash equivalents and restricted cash at beginning of period								23,700			46,678
Cash and cash equivalents and restricted cash at end of period							$	32,327		$	22,079
Supplemental disclosures of cash flow information
Interest paid	$	5,871		$	3,205		$	5,841		$	5,871
Supplemental schedule of noncash investing and financing activities
Lease incentive - lessor-paid tenant improvements	$	3,037		$	—		$	—		$	3,037
Debt discount included in other long-term liabilities	$	4,116		$	454		$	—		$	6,720
Common stock warrants issued in connection with term loan	$	3,331		$	—		$	—		$	3,331
Property and equipment included in accounts payable	$	72		$	802		$	57		$	72

See accompanying notes to unaudited condensed consolidated financial statements.

Tandem Diabetes Care, Inc. is a medical device company focused on the design, development and commercialization of products for people with insulin-dependent diabetes. The Company is incorporated in the state of Delaware. Unless the context requires otherwise, the terms the “Company” or “Tandem” refer to Tandem Diabetes Care, Inc.

The Company manufactures and sells insulin pump products ~~in the United States~~ that are designed to address large and differentiated needs of the insulin-dependent diabetes market. The Company’s ~~pump products currently include:~~

~~The Company began commercial sales of its first product, t:slim, in August 2012. During 2015,~~pumps, the Company ~~commenced commercial sales of two additional~~sells disposable products that are used together with the pumps and are replaced every few days, including cartridges for storing and delivering insulin, ~~pumps: t:flex in May 2015~~ and ~~t:slim G4 in September 2015. In October 2016,~~infusion sets that connect the ~~Company commenced commercial sales of t:slim X2 and discontinued new sales of t:slim. In August 2017, the Company commenced commercial sales of t:slim X2~~insulin pump to a user’s body. The Company’s insulin pump products are compatible with Dexcom G5 Mobile CGM integration, or t:slim X2 with G5, and discontinued new sales of t:slim G4. The Company will continue to provide ongoing service and support to existing t:slim and t:slim G4 customers.

~~In July 2016, the Company received clearance from the U.S. Food and Drug Administration (“FDA”) to begin offering~~ the Tandem Device Updater, a Macand PC-compatible tool for the remote update of Tandem insulin pump ~~software.~~software.

The Company began commercial sales of its first product, t:slim, in August 2012 and subsequently commercialized t:flex in May 2015, t:slim G4 in September 2015 and t:slim X2 in October 2016. The t:slim X2 hardware platform now represents 100% of new pump shipments, but the Company will continue to provide ongoing service and support to existing t:slim, t:slim G4 and t:flex customers. In June 2018, the Company received approval by the United States Food and Drug Administration (FDA) for t:slim X2 with Basal-IQ technology, the Company’s first generation Automated Insulin Delivery (AID) algorithm, and commenced commercial sales of this product in August 2018.

In August 2018, the Company commenced sales of the t:slim X2 in select geographies outside the United States.

In July 2016, the Company ~~also announced and~~ launched a Technology Upgrade Program that provided eligible t:slim and t:slim G4 customers a path to obtain the t:slim X2 ~~or, as of August 2017, t:slim X2 with G5.~~hardware platform. Participating customers had the right to exchange their original t:slim and t:slim G4 for a t:slim X2 ~~or t:slim X2 with G5,~~ under a variable pricing structure. The Technology Upgrade Program expired on September 30, 2017.

~~In September 2017, the Company commenced commercial sales of products using the t:lock~~^TM Connector, or t:lock, which replaces the standard Luer-lok connector that historically joined an infusion set to the cartridge. t:lock incorporates a smaller inner cavity than the Luer-lok connector, which reduces the amount of insulin used in the process and reduces the time required to fill the infusion set tubing.

Effective December 31, 2016, the Company adopted FASB Accounting Standard Codification (“ASC”) Topic 205-40, Presentation of Financial Statements – Going Concern, which requires management to evaluate whether there are relevant conditions and events that, in the aggregate, raise substantial doubt about the entity’s ability to continue as a going concern and to meet its obligations as they become due within one year after the date the financial statements are issued.

The financial statements included in this Quarterly Report on form 10-Q for the three and nine months ended September 30, 2017 (the “Quarterly Report”) have been prepared on a basis that assumes the Company will continue as a going concern, and do not include any adjustments that may result from the outcome of this uncertainty. This basis of accounting contemplates the recovery of the Company’s assets and the satisfaction of the Company’s liabilities and commitments in the normal course of business and does not include any adjustments to reflect the possible future effects of the recoverability and classification of recorded asset amounts or amounts and classification of liabilities that might be necessary should the Company be unable to continue as a going concern.

The Company has incurred operating losses since its inception and, as reflected in the accompanying financial statements, the Company ~~has~~had an accumulated deficit of ~~$466.2~~$603.8 million as of September 30, ~~2017,~~2018, which ~~reflects~~included a net loss of ~~$61.6~~$126.3 million for the nine months ended September 30, ~~2017. The~~2018. Management expects operating losses and negative cash flows to continue for at least the next 12 months.

As of September 30, 2018, the Company had $113.6 million in cash and cash equivalents and short-term investments ~~of $22.5 million~~in marketable securities. Management believes that the cash and investments on hand will be sufficient to satisfy its liquidity requirements for at ~~September 30, 2017, including $10.0 million of restricted~~ ~~cash as required by the Company’s term loan agreement (as amended, the “Term Loan Agreement”)~~ ~~with Capital Royalty Partners II, L.P. and its affiliate funds (“Capital Royalty Partners”).~~ The Company used $54.5 million in cash from operations in the nine months ended September 30, 2017. The Company concluded that, at the date the financial statements in this Quarterly Report were issued, it did not have sufficient cash to fund its operations forleast the next ~~twelve months without additional financing~~12 months.

The Company’s ability to execute on its business strategy, meet its future liquidity requirements, and ~~therefore, there was substantial doubt about~~achieve and maintain profitable operations, is dependent on a number of factors, including its ability to continue ~~as a going concern within one year after the date the financial statements were issued.~~

~~On October 9, 2017, the Company effected a 1-for-10 reverse stock split~~to gain market acceptance of its ~~issued~~products and ~~outstanding shares~~achieve a level of ~~common stock. The par value per share~~revenues adequate to support its cost structure, achieve renewal pump sales objectives, develop and launch new products, increase gross profits from higher sales of infusion sets, maximize manufacturing efficiencies, satisfy increasing production requirements, leverage the ~~authorized number of shares of common stock~~investments made in its sales, clinical, marketing and ~~preferred stock were not adjusted as a result of the reverse stock split. All common stock share~~customer support organizations and per-share amounts for all periods presented in these condensed financial statements have been adjusted to reflect the reverse stock split. The number of authorized shares of common stock remains at 100 million shares.operate its business and manufacture and sell products without infringing third party intellectual property rights.

The Company ~~completed a registered~~has funded its operations primarily through private and public ~~offering on October 17, 2017, or the October Financing, which resulted in gross proceeds to the~~equity and debt financing. The Company of $16.2 million, before deducting underwriting discounts and commissions and other offering expenses (see Note 9 “Subsequent Events”). As part of the October Financing, the Company issued 4,630,000 shares of common stock, Series A warrants to purchase 4,630,000 shares of common stock and Series B warrants to purchase 4,630,000 shares of common stock, at a public offering price of $3.50 per share and accompanying warrants. The Series A warrants have an exercise price of $3.50 per share, are immediately exercisable, and will expire on the 5-year anniversary of the date of issuance. The Series B warrants have an exercise price of $3.50 per share, are immediately exercisable, and will expire on the 6-month anniversary of the date of issuance. Each series of warrants, if exercised by all holders in full, may ~~result in additional gross proceeds of $16.2 million to the Company. As a result of the completion of the financing, the Company has satisfied the equity financing covenant~~ in the ~~Term Loan Agreement~~ ~~(see Note 6, “Term Loan Agreement”), although it remains subject to additional covenants.~~

~~The Company believes it will be necessary to raise additional funding.~~ ~~The Company intends to~~future seek additional capital from public or private offerings of its capital stock, or it may elect to borrow additional amounts under new ~~debt financing arrangements~~credit lines or from other sources. If the Company issues equity or ~~convertible~~ debt securities to raise additional ~~funding,~~funds, its existing stockholders may experience dilution, it may incur significant financing costs, and the new equity or ~~convertible~~ debt securities may have rights, preferences and privileges senior to those of its existing stockholders. There can be no assurance that equity or debt financing will be available on acceptable terms, or at all.

The Company has funded its operations primarily through private and public equity and debt financing. The Company may in the future seek additional capital from public or private offerings of its capital stock, or it may elect to borrow amounts under new credit lines or from other sources. If the Company issues equity or debt securities to raise additional ~~funding,~~funds, its existing stockholders may experience dilution, it ~~would~~may incur ~~additional~~significant financing or debt service ~~obligations, it could become subject~~costs, and the new equity or debt securities may have rights, preferences and privileges senior to ~~additional restrictions limiting~~those of its ~~ability to operate its business, and it may be required to further encumber its assets.~~ The Company’s ability to continue as a going concern, meet its minimum liquidity requirements, satisfy the covenants under the Term Loan Agreement, and execute its business strategy is dependent on its ability to raise significant additional capital, of which thereexisting stockholders. There can be no ~~assurance. If the Company cannot generate sufficient revenues from the sale of its products or secure additional~~assurance that financing will be available on acceptable terms, ~~it may be forced to significantly alter its business strategy, substantially curtail~~ or ~~modify its current operations, or cease operations altogether.~~

The Company has prepared the accompanying unaudited condensed financial statements in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments which are of a normal and recurring nature, considered necessary for a fair presentation of the financial information contained herein, have been included.at all.

Interim financial results are not necessarily indicative of results anticipated for the full year or any other period(s). These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited financial statements and accompanying footnotes included in the Company’s Annual Report on Form 10-K for the year ended December 31, ~~2016 (“Annual Report”)~~2017 (Annual Report), from which the balance sheet information herein was derived. These unaudited condensed consolidated financial statements exclude disclosures required by U.S. GAAP for complete financial statements.

The condensed consolidated financial statements include the accounts of Tandem Diabetes Care, Inc. and its wholly owned subsidiary in Canada. All significant intercompany balances and transactions have been eliminated in consolidation.

Certain reclassifications of prior year amounts have been made to conform to the current year presentation.

There have been no ~~significant~~material changes in our significant accounting policies during the nine months ended September 30, ~~2017,~~2018, as compared with those disclosed in the Annual ~~Report.~~Report other than adoption of the new revenue recognition standard (Revenue from Contracts with Customers Standard).

The preparation of the financial statements in conformity with U.S. GAAP requires management to make informed estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities in the Company’s financial statements and accompanying footnotes as of the date of the financial statements. Actual results could materially differ from those estimates and assumptions.

Operating segments are identified as components of an enterprise about which discrete financial information is available for evaluation by the chief operating decision-maker (CODM) in making decisions regarding resource allocation and assessing performance. The Company’s current product offering consists primarily of insulin pumps, disposable cartridges and infusion sets for the storage and delivery of insulin. The Company has viewed its operations and managed its business as one segment as key operating decisions and resource allocations are made by the CODM using consolidated financial data.

The Company recorded $10.0 million ~~and $2.0 million~~ of restricted cash as of ~~September 30, 2017 and~~ December 31, ~~2016, respectively,~~2017, for the minimum cash balance requirement in connection with the Amended and Restated Term Loan Agreement (Term Loan Agreement) with Capital Royalty Partners II, L.P. and its affiliated funds (CRG) (see Note 6, ~~“Term~~Term Loan ~~Agreement”)~~Agreement). Due to the full repayment of the term loan in August 2018, no restricted cash balance existed at September 30, 2018. In January 2018, the Company adopted new guidance from the Financial Accounting Standards Board (FASB) that clarified how entities should classify certain cash receipts and cash payments on the statement of cash flows. As a result, the restricted cash balance that existed in prior periods is included as a component of cash and cash equivalents on the statement of cash flows in the relevant periods presented.

The Company grants credit to various customers in the ~~normal~~ordinary course of business. The Company maintains an allowance for doubtful accounts for potential credit losses. Provisions are made based on historical experience, assessment of specific risk, ~~specific~~ review of outstanding invoices, and various ~~additional~~ assumptions and estimates that are believed to be reasonable under the circumstances. Uncollectible accounts are written off against the allowance after appropriate collection efforts have been exhausted and when it is deemed that a balance is uncollectible.

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued ~~expenses,~~expense, and employee-related liabilities are reasonable estimates of their fair values because of the short-term nature of these assets and liabilities. Short-term investments are carried at fair value. Based on the borrowing rates currently available for loans with similar terms, the Company believes ~~that~~ the fair value of its long-term notes payable approximates its carrying value.

~~Certain trade-in rights offered by the Company pursuant to the Technology Upgrade Program to certain eligible customers, have been determined to be guarantees under applicable accounting guidance.~~ The ~~Company recorded a liability for the~~ estimated fair value of certain of the ~~guarantees at their inception. The Program expired on~~Company’s common stock warrants is determined using the Black-Scholes pricing model as of September 30, 2018 and December 31, 2017 ~~at which time the remaining guarantee liabilities of $1.1 were recognized as sales. For further details regarding these guarantees,~~ (see ~~the information included under the heading “Revenue Recognition” within this Note 2, as well as the information in~~ Note 5, “Fair Value ~~Measurements.”~~Measurements”).

Revenue is generated primarily from sales ~~in the United States~~ of insulin pumps, disposable cartridges and infusion sets to individual customers and third-party distributors that resell the product to insulin-dependent diabetes customers. The Company is paid directly by customers who use the products, distributors and third-party insurance payors.

In January 2018, the Company adopted the Revenue from Contracts with Customers Standard which supersedes existing revenue guidance under U.S. GAAP and International Financial Reporting Standards. Pursuant to the Revenue from Contracts with Customers Standard’s core principle, subsequent to January 1, 2018, the Company recognizes revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company elected to implement this new standard utilizing the modified retrospective method. Under this approach, the Company applied the new standard to all new contracts initiated on or after the effective date, and, for contracts which had remaining obligations as of the effective date, the Company recorded an adjustment to the opening balance of accumulated deficit. The accounting for the significant majority of the Company’s revenues is not impacted by the new guidance. As a result, on January 1, 2018, the Company recorded a net reduction to accumulated deficit in the amount of $149,000, reflecting the accounting change.

Prior to the implementation of this new standard, revenue was recognized when persuasive evidence of an arrangement ~~exists,~~existed, delivery ~~has~~had occurred and title passed, the price iswas fixed or determinable, and collectability iswas reasonably assured.

The Company launched a Technology Upgrade Program in 2016, which expired September 30, 2017. The trade-in rights associated with the Program were accounted for as guarantees or rights to return based on specific factors and circumstances, including the period of time the trade-in rights were exercisable, the likelihood that the trade-in rights would be exercised, and the amount of the specified-price trade-in value.

The Company determined that trade-in rights for t:slim G4 Pump customers were generally guarantees. The Company accounted for the guarantees under applicable accounting standards, which require a guarantor to recognize, at the inception of the guarantees, a liability for the estimated fair value of the obligation undertaken in issuing the guarantees. Subsequently, the initial liability recognized for the guarantees was reduced as the Company was released from the risk under the guarantees, which was when the trade-in right was exercised or the right expired. The guarantees were accounted for as an element of a multiple element arrangement. The estimated fair value of the guarantees was based on various economic and customer behavioral assumptions, including the probability that a trade-in right would be exercised, the specified trade-in amount, the expected fair value of the used t:slim G4 Pump at trade-in and the expected sales price of a t:slim X2 Pump. Upon expiration of the Program at September 30, 2017, the remaining guarantee liabilities of $1.1 were recognized as sales compared to ~~$1.2 million recorded as guarantee liabilities in other current liabilities on the accompanying balance sheets, as of September 30, 2017 and December 31, 2016, respectively.~~

The Company determined that t:slim Pump trade-in rights were in-substance rights to return products. Such rights to return were accounted for pursuant to the right of return accounting guidance. As the Company did not have sufficient history to reasonably estimate returns associated with trade-in rights, all eligible t:slim Pump sales between July 2016 and October 2016, which is when the Company ~~discontinued new shipments of t:slim,~~ were recorded as deferred revenue until the trade-in right was exercised or the right expired. Despite expiration of the Program at September 30, 2017, the Company recorded $0.2 million for upgrades requested but not yet fulfilled compared to $3.2 million as a trade-in rights reserve in deferred revenue on the accompanying balance sheets, as of September 30, 2017 and December 31, 2016, respectively.

~~The Company~~ considers the individual deliverables in its product offering as separate ~~units of accounting and recognizes deliverables as revenue upon delivery only if (i)~~performance obligations. The transaction price is determined based on the ~~deliverable has standalone~~consideration expected to be received, based either on the stated value ~~and (ii)~~in contractual arrangements or the ~~arrangement includes a general right of return relative~~estimated cash to ~~the delivered item(s) and delivery or performance of the undelivered item(s) is probable and substantially controlled by the Company.~~be collected in non-contracted arrangements. The Company allocates the consideration to the ~~separate units of accounting, unless~~individual performance obligations and recognizes the ~~undelivered elements were~~consideration based on when the performance obligation is satisfied, considering whether or not this occurs at a point in time or over time. Generally, insulin pumps, cartridges, infusion sets and accessories are deemed ~~perfunctory and inconsequential. The amount of the determined guarantee fair value is allocated in full~~performance obligations that are satisfied upon delivery, while access to the ~~guarantee and~~complementary products, such as the remaining allocable consideration is allocated to other separate units of accounting using the relative selling price method, in which allocation of consideration is based on vendor-specific objective evidence (“VSOE”) if available, third-party evidence (“TPE”), or if VSOE and TPE are not available, management’s best estimate of a standalone selling price (“ESP”) for the undelivered elements.

~~The Company offers a~~t:connect cloud-based data management application ~~t:connect, which is made available to customers upon purchase of any of its insulin pumps. In July 2016, the Company received clearance from the FDA to begin offering~~and the Tandem Device Updater, ~~a Macand PC-compatible tool~~are considered performance obligations satisfied over the four-year warranty period of the insulin pumps. There is no standalone value for ~~the remote update of Tandem insulin pump software. Utilizing Tandem Device Updater,~~these complementary products. Therefore, the Company ~~may from time to time provide future unspecified software upgrades~~determines their value by applying the expected cost plus margin approach and then allocates the residual to the insulin pump’s essential software. The t:connect service and the embedded right included with qualifying insulin pumps to receive, on a when-and-if-available basis, future unspecified software upgrades relating to the product’s essential software are deemed undelivered elements at the time of the insulin pump sale. Because the Company has neither VSOE nor TPE for these deliverables, the allocation of revenue is based on the Company’s ESP. The Company establishes its ESP based on the estimated cost to provide such services, including consideration for a reasonable profit margin, which is then corroborated by comparable market data. The Company allocates fair value based on management’s ESP to these elements at the time of sale and recognizes the revenue over apumps. ~~four-year period, which is the hosting period for t:connect and the period that software upgrades are expected to be provided.~~ At September 30, ~~2017~~2018 and December 31, ~~2016, $1.8~~2017, $2.7 million and ~~$1.6~~$2.0 million, respectively, were recorded as deferred revenue for these ~~undelivered elements. All other undelivered elements at the time of sale~~performance obligations that are ~~deemed inconsequential or perfunctory.~~satisfied over time.

~~The~~Additionally, the Company offers a 30-day right of return to its customers from the date of shipment of any of its insulin pumps, provided a physician’s confirmation of the medical reason for the return is received. Estimated allowances for sales returns are based on historical returned quantities as compared to pump shipments in those same periods of return. The return rate is then applied to the sales of the current period to establish a reserve at the end of the period. The return rates used in the reserve are adjusted for known or expected changes in the marketplace when appropriate. ~~The~~Under the new guidance, the allowance for product returns is recorded as a reduction of revenue and ~~accounts receivable~~an increase in deferred revenue in the period in which the related sale is recorded. Historically, the allowance was recorded as a reduction of revenue and accounts receivable. The amount recorded on the Company’s balance sheets for product return allowance was $0.2 million and $0.2 million at September 30, ~~2017~~2018 and December 31, ~~2016,~~2017, respectively. Actual product returns have not differed materially from estimated amounts reserved in the accompanying condensed consolidated financial statements.

The Company generally provides a four-year warranty on its insulin pumps to end user customers and may replace any pumps that do not function in accordance with the product specifications. Insulin pumps returned to the Company may be refurbished and redeployed. Additionally, the Company offers a six-month warranty on disposable cartridges and infusion sets. Estimated warranty costs are recorded at the time of shipment. Warranty costs are estimated based on the current expected product replacement cost and expected replacement rates based on historical experience. The Company evaluates the reserve quarterly and makes adjustments when appropriate. Changes to the actual replacement rates or the expected product replacement cost could have a material impact on the Company’s estimated warranty reserve.

AtAs of September 30, ~~2017~~2018 and December 31, ~~2016,~~2017, the warranty reserve was ~~$4.8~~$7.7 million and ~~$5.7~~$5.6 million, respectively. The following table provides a reconciliation of the change in product warranty liabilities from December 31, ~~2016~~2017 through September 30, ~~2017~~2018 (in thousands):

Balance at December 31, 2016	$	5,690
Balance at December 31, 2017				$	5,640
Provision for warranties issued during the period		4,110			5,570
Settlements made during the period		(5,240	)		(5,741	)
Increases in warranty estimates		190			2,267
Balance at September 30, 2017	$	4,750
Balance at September 30, 2018				$	7,736

Current portion	$	2,080		$	4,137
Non-current portion		2,670			3,599
Total	$	4,750		$	7,736

Stock-based compensation cost is measured at the grant date based on the estimated fair value of the award, and the portion that is ultimately expected to vest is recognized as compensation expense over the requisite service period on a straight-line basis. The Company estimates the fair value of stock options issued under the Company’s 2013 Stock Incentive Plan (“2013 Plan”) and shares issued under the Company’s 2013 Employee Stock Purchase Plan (“ESPP”) using a Black-Scholes option-pricing model on the date of grant. The Black-Scholes option-pricing model requires the use of subjective assumptions about a number of key variables, including stock price volatility, expected term, and risk-free interest rate. For awards that vest based on the achievement of service conditions, the Company recognizes expense using the straight-line method less estimated forfeitures based on historical experience.

Basic net loss per share is calculated by dividing the net loss by the weighted average number of common shares that were outstanding for the period, without consideration for common stock equivalents.

Diluted ~~net~~ loss per share is calculated by dividing the net loss by the sum of the weighted average number of common shares that were outstanding for the period and the weighted-average number of dilutive common share equivalents outstanding for the period determined usingin accordance with the treasury stock ~~method.~~method and reflects the potential dilution that would occur if securities or other contracts to issue common stock were exercised or converted to common stock. Dilutive common share equivalents are comprised of warrants, potential awards granted pursuant to the ESPP, and options outstanding under the Company’s other equity incentive ~~plans, and shares subject to issuance pursuant~~plans. For warrants that are recorded as a liability in the accompanying balance sheet, the calculation of diluted loss per share requires that, to the ~~ESPP.~~extent the average market price of the underlying shares for the reporting period exceeds the exercise price of the warrants and the presumed exercise of such securities are dilutive to loss per share for the period, an adjustment to net loss used in the calculation is required to remove the change in fair value of the warrants from the numerator for the period. Likewise, an adjustment to the denominator is required to reflect the related dilutive shares, if any, under the treasury stock method. For all periods presented, there is no difference in the number of shares used to calculate basic and diluted shares outstanding due to the Company’s net loss position.

Potentially dilutive securities not included in the calculation of diluted net loss per share (because inclusion would be anti-dilutive) are as follows (in thousands, in common stock equivalent shares):

	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
	2017		2016		2017		2016		2018		2017		2018		2017
Common stock warrants		-		99		-		99
Warrants for common stock										710		-		710		-
Common stock options		8		293		3		262		5,155		8		3,031		3
ESPP		-		13		-		7		61		-		24		-
		8		405		3		368		5,926		8		3,765		3

In ~~August~~February 2016, the ~~Financial Accounting Standards Board (“FASB”)~~FASB issued final guidance for lease accounting. The new accounting standard requires lessees to recognize right-of-use assets and corresponding lease liabilities for all leases with lease terms of greater than twelve months. It also changes the definition of a lease and expands the disclosure requirements of lease arrangements. In July 2018, the FASB added a transition option for implementation that allows companies to continue to use the legacy guidance ~~that clarifies how entities should classify certain cash receipts~~in ASC 840, Leases, including its disclosure requirements, in the comparative periods presented in the year of adoption of the new leases standard. The new accounting standard must be adopted using the modified retrospective approach and ~~cash payments on the statement of cash flows. The guidance also clarifies how the predominance principle should~~will be ~~applied when cash receipts and cash payments have aspects of more than one class of cash flows. The guidance is~~ effective for ~~public companies for~~the Company starting in the first quarter of fiscal ~~years beginning after December 15, 2017, and interim periods within those years.~~ 2019. Companies that elect the transition option will record a cumulative-effect adjustment to retained earnings in the period of adoption rather than the earliest period presented. The Company ~~does not believe~~expects that the adoption of this standard will result in a material increase in assets and liabilities on its consolidated balance sheets and is in the process of analyzing its lease commitments, which consist primarily of operating leases for facilities, to determine the impact of the adoption of the standard ~~will have a material impact~~ on ~~the Company’s statement of cash flow.~~its financial statements.

In June 2016, the FASB issued ~~a new credit loss standard~~an accounting standards update that changes the ~~impairment model~~measurement and recognition of credit losses for most financial assets and certain other instruments. The new standard requires the use of forward-looking expected credit loss models based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount, which may result in earlier recognition of credit losses under the new standard. The standard is effective for public business entities for annual periods beginning after December 15, 2019, and interim periods within those years. ~~Early~~The Company plans to implement the new standard in the first quarter of fiscal 2020, and is in the process of reviewing its credit loss models to assess the impact of the adoption of the standard on its financial statements.

In March 2018, the FASB issued Accounting Standards Update No. 2018-05, Income taxes (Topic 740): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 118 regarding Income Tax Accounting Implications of the Tax Cuts and Jobs Act. The Company recognized the income tax effects of the 2017 Tax Act in its 2017 financial statements for which the accounting under ASC Topic 740 is ~~permitted~~incomplete, but a reasonable estimate could be determined. The tax effects of certain provisions of the 2017 Tax Act, such as the deductibility of compensation in excess of $1 million for ~~all entities~~ ~~for annual periods beginning after December 15, 2018,~~certain employees, and ~~interim periods within those years~~.limitations on executive compensation, requires further analysis. The Company is in the process of assessing the impact of the adoption of the standard on its financial statements.

In March 2016, FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718) (“ASU 2016-09”), which is intended to simplify several areas of accounting for share-based payment arrangements. The amendments in this update cover such areas as the ~~recognition~~ of excess tax benefits and deficiencies, the classification of those excess benefits on the statement of cash flows, an accounting policy election for forfeitures, the amount an employer can withhold to cover income taxes and still qualify for equity classification and the classification of those taxes paid on the statement of cash flows. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those annual periods. The Company adopted this standard in the first quarter of 2017. The Company had excess tax benefits for which a benefit could not previously be recognized of approximately $656,000 as of December 31, 2016. Upon adoption, the balance of the unrecognized excess tax benefits was reversed with the impact recorded to (accumulated deficit) retained earnings, including any change to the valuation allowance as a result of the adoption. Due to the full valuation allowance on the U.S. deferred tax assets as of December 31, 2016, there was no impact to the financial statements as a result of this adoption.

In ~~February 2016,~~August 2018, the FASB issued ~~final guidance~~ASU 2018-15 that changes the accounting for ~~lease accounting.~~implementation costs incurred in a cloud computing arrangement that is a service contract. ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The ~~new guidance requires lessees to put most leases on their~~implementation costs should be presented as a prepaid asset in the balance sheet ~~but to recognize expenses on their income statement in a manner similar to current accounting principles. The new guidance also eliminates~~and expensed over the ~~current real estate-specific provisions for all entities.~~term of the hosting arrangement. The standard is effective for ~~public companies for~~annual periods, including interim periods within those annual periods, beginning after December 15, ~~2018, and interim periods within those years.~~2019. Early adoption is ~~permitted for all entities.~~ permitted. The Company is in the process of assessing the impact of the adoption of the standard on its financial statements.

In May 2014, FASB and the International Accounting Standards Board issued a comprehensive new revenue recognition standard (“Revenue from Contracts with Customers Standard”) that will supersede existing revenue guidance under U.S. GAAP and International Financial Reporting Standards. The Revenue from Contracts with Customers Standard’s core principle is that a company will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. In doing so, companies will need to use more judgment and make more estimates than under current guidance. The Revenue from Contracts with Customers Standard will be effective for the Company beginning in its first quarter of 2018, and early adoption is permitted.

Subsequently, FASB issued the following standards related to Revenue from Contracts with Customers Standard: Principal versus Agent Considerations; Identifying Performance Obligations and Licensing; and Narrow-Scope Improvements and Practical Expedients (collectively, the “new revenue standards”). The new revenue standards may be applied retrospectively to each prior period presented (full retrospective method) or retrospectively with the cumulative effect recognized as of the date of adoption (the modified retrospective method). The Company currently expects to adopt the new revenue standards in the first quarter of 2018 utilizing the modified retrospective method. The Company currently believes that the adoption will not have a material impact on the recognition of revenues for the sale of its products through third-party distributors and insurance payors with whom it has contractual arrangements, which generally comprise approximately 99% of its sales. Additionally, the Company has given consideration to the accounting for warranty and commissions and does not anticipate a material change to its current method of expense recognition. As of September 30, 2017, the Company has not determined the full impact the adoption of the new revenue standard may have on its reported revenue or results of operations.

The Company invests in investment securities, principally debt instruments of financial institutions and corporations with strong credit ratings. The following represents a summary of the estimated fair value of short-term investments atas of September 30, ~~2017~~2018 and December 31, ~~2016~~2017 (in thousands):

At September 30, 2017

Maturity
(in years)

Amortized
Cost

Unrealized
Gain

Unrealized
Loss

Estimated
Fair Value

Trading securities:

Mutual funds held for nonqualified deferred compensation plan participants

$
416

$
43

$
—

$
459

Total

$
416

$
43

$
—

$
459

At September 30, 2018	Maturity (in years)	Amortized Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
Available-for-sale investment securities:
Commercial paper	Less than 1	$	65,654	$	1	$	(14	)	$	65,641
U.S. Treasury securities	Less than 1		15,613		—		—			15,613
Total		$	81,267	$	1	$	(14	)	$	81,254

At December 31, 2016	Maturity (in years)	Amortized Cost		Unrealized Gain		Unrealized Loss			Estimated Fair Value
Available-for-sale investment securities:
Commercial paper	Less than 1	$	8,483	$	1	$	(2	)	$	8,482
At December 31, 2017											Maturity (in years)	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Trading securities:
Mutual funds held for nonqualified deferred compensation plan participants		$	354	$	26	$	(2	)	$	378		$	459	$	20	$	—	$	479
Total		$	8,837	$	27	$	(4	)	$	8,860		$	459	$	20	$	—	$	479

Inventory consisted of the following atas of September 30, ~~2017~~2018 and December 31, ~~2016~~2017 (in thousands):

	September 30,		December 31,		September 30,		December 31,
	2017		2016		2018		2017
Raw materials	$	10,138	$	9,375	$	8,609	$	10,328
Work in process		5,497		4,395
Work-in-process						4,489		3,812
Finished goods		14,350		7,425		11,268		12,853
Total	$	29,985	$	21,195	$	24,366	$	26,993

The increase in inventory at September 30, 2017 as compared to December 31, 2016 is primarily due to an increase in infusion set finished goods in connection with the commercial launch of the t:lock infusion set.

Authoritative guidance on fair value measurements defines fair value, establishes a consistent framework for measuring fair value, and expands disclosures for each major asset and liability category measured at fair value on either a recurring or a nonrecurring basis. Fair value is intended to reflect an assumed exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the authoritative guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

The following table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis as of September 30, ~~2017~~2018 and December 31, ~~2016,~~2017, and indicates the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value (in thousands):

			Fair Value Measurements at								Fair Value Measurements at
			September 30, 2017								September 30, 2018
			(Level 1)		(Level 2)		(Level 3)				(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents ⁽¹⁾	$	16,527	$	16,527	$	—	$	—	$	28,104	$	28,104	$	—	$	—
Mutual funds held for nonqualified deferred compensation plan participants ⁽²⁾		459		459	—		—
Commercial paper										65,641	—			65,641	—
U.S. Treasury securities										15,613		15,613	—		—
Total assets	$	16,986	$	16,986	$	—	$	—	$	109,358	$	43,717	$	65,641	$	—

Liabilities
Deferred compensation ⁽²⁾	$	459	$	459	$	—	$	—
Common stock warrants									$	20,643	$	—	$	—	$	20,643
Total liabilities	$	459	$	459	$	—	$	—	$	20,643	$	—	$	—	$	20,643

			Fair Value Measurements at								Fair Value Measurements at
			December 31, 2016								December 31, 2017
			(Level 1)		(Level 2)		(Level 3)				(Level 1)		(Level 2)		(Level 3)
Assets
Cash equivalents ⁽¹⁾	$	39,941	$	39,941	$	—	$	—	$	23,700	$	23,700	$	—	$	—
Commercial paper		8,482		—		8,482		—
Mutual funds held for nonqualified deferred compensation plan participants ⁽²⁾		378		378		—		—		479		479		—		—
Total assets	$	48,801	$	40,319	$	8,482	$	—	$	24,179	$	24,179	$	—	$	—
Liabilities
Common stock warrants									$	5,432	$	—	$	—	$	5,432
Deferred compensation ⁽²⁾	$	378	$	378	$	—	$	—		479		479		—		-
Total liabilities	$	378	$	378	$	—	$	—	$	5,911	$	479	$	—	$	5,432

The Company’s Level 2 financial instruments are valued using market prices on less active markets with observable valuation inputs such as interest rates and yield curves. The Company obtains the fair value of Level 2 financial instruments from quoted market prices, calculated prices or quotes from third-party pricing services. The Company validates these prices through independent valuation testing and review of portfolio valuations provided by the Company’s investment managers. There were no transfers between Level 1 and Level 2 assets during the nine months ended September 30, ~~2017.~~2018.

The ~~Company recorded $1.2 million as guarantee liabilities in other current liabilities on the accompanying condensed balance sheet at December 31, 2016. There were no guarantee~~Company’s Level 3 liabilities at September 30, ~~2017. Guarantees were recorded as a reduction~~2018 included the Series A warrants issued by the Company in connection with its public offering of ~~revenue~~common stock in the statement of operations and other comprehensive loss. Guarantees are not measured at fair value on a recurring basis, and therefore are not included in the tables above. Guarantees are classified withinOctober 2017. Level 3 ofliabilities at December 31, 2017 included the ~~fair value hierarchy. The estimated fair value of~~Series A and Series B warrants issued by the guarantees is based on various economic and customer behavioral assumptions, including the probability that a trade-in right will be exercised, the specified trade-in amount, the expected fair value of the used t:slim G4 Pump at trade-in and the expected sales price of t:slim X2 (see Note 2, “Summary of Significant Accounting Policies – Revenue Recognition”). ChangesCompany in ~~the probability that a trade-in right will be exercised have the most significant impact on the estimate of the fair value of the liabilities.~~

In connection with the ~~Term Loan Agreement, on March 7,~~October 2017 offering. The Series A warrants have a term of five years and initially provided holders the ~~Company issued ten-year warrants~~right to purchase ~~193,788~~4,630,000 shares of the Company’s common stock at an exercise price of ~~$23.50~~$3.50 per ~~share (the “Capital Royalty Warrant”~~share. The Series B warrants had a term of six months and initially provided holders the right to purchase 4,630,000 shares of the Company’s common stock at an exercise price of $3.50 per share. The Series A and Series B warrants were initially valued in the aggregate amount of $6.5 million on the date of issuance utilizing a Black-Scholes pricing model. As of September 30, 2018, there were Series A warrants to purchase 516,030 shares of common stock outstanding and no Series B warrants outstanding (see Note 7, “Stockholders’ Equity”).

The Company ~~used~~reassesses the ~~Black-Scholes option-pricing model to calculate the~~fair value of the ~~Capital Royalty Warrant~~outstanding Series A and Series B warrants at each reporting date utilizing a Black-Scholes pricing model. Inputs used in the pricing model include estimates of~~approximately $3.3 million~~. The Capital Royalty Warrant was recorded as debt discount and stockholders’ equity, as the warrants met the definition of an equity instrument. The Black-Scholes option-pricing model requires the use of subjective assumptions about a number of key variables, including stock price volatility, expected ~~term,~~warrant life and risk-free interest rate. The Company develops its estimates based on publicly available historical data. The assumptions used to estimate the fair values of the common stock warrants at September 30, 2018 and December 31, 2017 are presented below:

The following table presents a summary of changes in the fair value of the Company’s Level 3 financial assets for the nine months ended September 30, 2018:

During the nine months ended September 30, 2018, the Company issued 8,598,076 shares of common stock upon the exercise of Series A and Series B warrants and 13,450 Series B warrants expired unexercised. As a result, there were 516,030 Series A warrants to purchase common stock outstanding as of September 30, 2018.

In August 2018, the Company fully repaid the term loan made by CRG pursuant to the Term Loan Agreement. The term loan was collateralized by all assets of the Company. The balance of the outstanding debt at the time of repayment was $82.7 million. The repayment included approximately $1.1 million in accrued interest and $5.0 million in associated financing fees that became due. As a result of the repayment, the Company ~~had $82.3 million and $81.1 million of aggregate~~did not have any borrowings outstanding under the Term Loan Agreement atas of September 30, ~~2017 and~~2018. The Company had aggregate borrowings under the Term Loan Agreement of $82.7 million as of December 31, ~~2016, respectively.~~2017. Notes payable-long term on the accompanying consolidated balance sheet reflected these aggregate borrowings, offset by a $6.2 million debt discount associated with the financing fees and certain debt issuance costs at December 31, 2017. Such discounts were amortized to interest expense over the term of the loan using the effective interest method. At the time of repayment, the remaining balance of $5.3 million was accelerated and recognized as a loss on extinguishment of debt in the consolidated statement of operations in the third quarter ended September 30, 2018.

Under the Term Loan Agreement, interest iswas payable at the Company’s option, (i) in cash at a rate of 11.5% per annum, or (ii) at a rate of 9.5% of the 11.5% per annum in cash and 2.0% of the 11.5% per annum (the “PIK Loan”) to be added to the principal of the loan and subject to accruing interest. Interest-only payments ~~are~~were due quarterly on March 31, June 30, September 30 and December 31 of each year of the interest-only payment period, which ~~ends~~would have ended on December 31, 2019. The principal balance iswas due in full at the end of the term of the loan, which iswas March 31, 2020 (the “Maturity Date”). The Company had elected to pay interest in cash at a rate of 11.5% per annum through September 30, 2015. ~~Beginning~~From October 1, 2015 through December 31, 2017, the Company elected to pay interest in cash at a rate of 9.5% per annum and for a rate of 2.0% per annum to be added to the principal of the loan. As a result, ~~$2.3~~$2.7 million was added to the principal of the loan ~~since October 1, 2015, which the Company refers to as PIK Loans.~~during that time period (the “PIK Loans”).

The ~~term loan is collateralized by all assets~~Company entered into a series of ~~the Company. The principal financial covenants require that the Company attain minimum annual revenues of $80.0 million in 2017 and $95.0 million each year thereafter until the Maturity Date.~~

~~Pursuant~~amendments to~~Amendment No. 3 to~~ ~~Term Loan Agreement (the “Third Amendment”), the Company agreed to pay, on the earlier of (i) the Maturity Date, (ii) the date that the loan under~~ the Term Loan Agreement ~~becomes due,~~in 2016, 2017 and ~~(iii)~~2018, which included the ~~date on which the Company makes a voluntary pre-payment~~addition of ~~the loan,~~ a financing fee ~~equal to 3.0% of~~payable at the sum of (x) the aggregate amount drawn under the Third Amendment, which is $50.0 million, and (y) any PIK Loans issued in relation to the Third Amendment (collectively, the “Back End Financing Fee”).

~~The~~ ~~audit report~~maturity of the Company’s ~~independent registered public accounting firm contained in~~loans, the ~~Annual Report included an explanatory paragraph that describes conditions that raise substantial doubt about~~issuance of 193,788 ten-year warrants to CRG to purchase shares of the Company’s ~~ability~~common stock at an exercise price of $23.50 per share and certain other minimum financing covenants. The financing fee was applicable to ~~continue as a going concern. This explanatory paragraph constituted a potential event of default under the Term Loan Agreement. On March 7, 2017, the Company entered into~~ ~~Waiver and Amendment No. 4 to the~~ Term Loan Agreement (the “Fourth Amendment”), which included a limited waiver of the potential event of default that could have resulted from the explanatory paragraph. In consideration for the waiver, the Company agreed to: (i) issue the Capital Royalty Warrant, (ii) increase its restricted cash balance from $2.0 million to $10.0 million, (iii) provide Capital Royalty Partners the same information it makes available to its board of directors, subject to limited exceptions, and (iv) not incur additional third party indebtedness secured solely by accounts receivable, inventory and cash. In addition, the Fourth Amendment includes a covenant requiring the Company to complete financings in which its gross proceeds from the sale of equity securities is at least $30.0 million, no later than January 15, 2018. Furthermore, the Company agreed to increase the Back End Financing Fee to 5.0% of the entire aggregate principal amount of borrowings outstanding, including total PIK Loans issued. The ~~Back End Financing Fee is payable at maturity~~Company treated the execution of each of the ~~Company’s loans~~Third, Fourth and ~~on the principal amount of any loans for which it makes an optional prepayment, and may be payable in connection with certain asset sales or a change of control.~~

As of September 30, 2017 and December 31, 2016, respectively, the Company had accrued $4.1 million and $1.5 million for the Back End Financing Fee in other long-term liabilities and as contra-debt in notes payable-long-term on the accompanying condensed balance sheets.

~~The Company evaluated execution of the Fourth Amendment~~Fifth Amendments as a modification for accounting ~~purposes and concluded that it did not constitute a modification because the~~purposes. The present value of the future cash flows under ~~the Fourth~~ ~~Amendment~~these amendments did not exceed the present value of the future cash flows under the previous terms by more than 10%. ~~The Back End Financing Fee,~~

At December 31, 2017, the ~~value~~Company had accrued $4.1 million for the financing fee of 5%, which was subsequently increased to $5.0 million, or 6%, in February 2018. These fees were included in other long-term liabilities and as contra-debt in notes payable-long term on the ~~Capital Royalty Warrant, and the remaining~~accompanying consolidated balance ~~of debt issuance costs and debt discount of the loan are amortized to interest expense over the remaining term of the Term Loan Agreement using the effective interest method.~~sheet.

In the first quarter of 2017, the Company completed a public offering of 1,850,000 shares of its common stock at a public offering price of $12.50 per share. The gross proceeds to the Company from the offering were $23.1 million, before deducting underwriting discounts and commissions and other offering expenses payable by the Company.

InFrom July 2017 ~~the Company entered into an Equity Distribution Agreement implementing an ATM program for aggregate gross proceeds up to $15.0 million. During the~~ ~~three~~ ~~months ended~~through September ~~30,~~ 2017, the Company sold 464,108 shares of its common stock under ~~the ATM~~its “at-the-market” offering program at prices ranging from $5.64 to $10.54. The gross proceeds from the offering were $4.3 million, before deducting underwriting discounts and commissions and other offering expenses.

In the fourth quarter of 2017, the Company completed a public offering, pursuant to which it sold 4,630,000 shares of its common stock, Series A warrants to purchase up to 4,630,000 shares of common stock and Series B warrants to purchase up to 4,630,000 shares of common stock at a public offering price of $3.50 per share and accompanying warrants. The gross proceeds from the public offering were approximately $16.2 million, before deducting underwriting discounts and commissions and other offering expenses. As of September 30, 2018, the Company had issued 8,598,076 shares upon exercise of Series A and Series B warrants, which resulted in gross proceeds to the Company of $29.5 million. As of September 30, 2018, there were 516,030 Series A warrants outstanding and no Series B warrants outstanding. In April 2018, 13,450 Series B warrants expired unexercised.

In the first quarter of 2018, the Company completed a public offering of 34,500,000 shares of its common stock at a public offering price of $2.00 per share. The gross proceeds to the Company from ~~these sales~~the offering were ~~$4.3~~$69.0 million, before deducting underwriting discounts and commissions and other offering expenses payable by the Company.

In August 2018, the Company. completed a public offering of 4,035,085 shares of its common stock at a public offering price of $28.50 per share. The gross proceeds to the Company from the offering were $115.0 million, before deducting underwriting discounts and commissions and other offering expenses payable by the Company.

The following shares of the Company’s common stock were reserved for future issuance atas of September 30, ~~2017~~2018 (in thousands):

In June 2018, the Company received approval from its stockholders to increase the number of shares of common stock reserved under the 2013 Plan by 5,500,000 shares. The Company issued ~~24,408~~8,598,076 shares of its common stock upon the exercise of warrants, and 31,519 shares of its common stock upon the exercise of stock options during the nine months ended September 30, ~~2017,~~2018. The Company did not issue any shares of its common stock upon the exercise of warrants, and issued ~~14,897~~24,406 shares of its common stock upon the exercise of stock options during the year ended December 31, ~~2016.~~2017.

The ESPP enables eligible employees to purchase shares of ~~the Company’s~~ common stock using their ~~after tax~~after-tax payroll deductions, subject to certain conditions. Historically, offerings under t~~The~~he ESPP ~~consists~~consisted of a two-year offering period with four six-month purchase periods which ~~begin~~began in May and November of each year. ~~There were~~The Company previously suspended the ESPP in May 2017 due to a lack of available shares. In June 2018, the Company received approval from its stockholders to increase ~~38,929~~the number of shares reserved for issuance under the ESPP by 2,000,000 shares. A new offering commenced under the ESPP on June 15, 2018, and the first purchase date will be November 15, 2018. As a result of the previous suspension of the ESPP, no shares of ~~the Company’s~~ common stock were purchased under the ESPP during the nine months ended September 30, ~~2017, and~~ 2018. There were ~~69,502~~38,929 shares of ~~the Company’s~~ common stock purchased under the ESPP during the year ended December 31, ~~2016.~~

The Company announced the suspension of the ESPP as of May 16, 2017 due to a lack of available shares. The suspension was accounted for as a cancellation of an award with no consideration. The previously unrecognized compensation cost as of the suspension date of $2.4 million was fully expensed during the second quarter of 2017.

In June 2018, the Company issued options to purchase 811,800 shares of common stock under the 2013 Plan, which were originally granted on December 1, 2017, subject to and conditioned upon the approval by its stockholders of an increase in the number of shares authorized under the 2013 Plan. In addition, in June 2018, the Company granted options to purchase 3,339,300 shares of common stock under the 2013 Plan. These options have an exercise price equal to the closing price of the common stock on the respective grant date, and generally vest 50% on the first anniversary of the grant date, with the balance vesting monthly over the following year.

	Stock Option												Stock Options
	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
	September 30,						September 30,						September 30,						September 30,
	2017			2016			2017			2016			2018			2017			2018			2017
Weighted average grant date fair value (per share)	$	3.00		$	35.00		$	5.10		$	37.80		$	21.77		$	3.00		$	12.35		$	5.10
Risk-free interest rate		2.0	%		1.3	%		1.9	%		1.4	%		2.8	%		2.0	%		2.8	%		1.9	%
Expected dividend yield		0.0	%		0.0	%		0.0	%		0.0	%		0.0	%		0.0	%		0.0	%		0.0	%
Expected volatility		60.3	%		56.1	%		60.0	%		55.5	%		70.5	%		60.3	%		71.4	%		60.0	%
Expected term (in years)		6.1			6.1			6.1			6.1			6.1			6.1			5.7			6.1

	ESPP				ESPP
	Nine Months Ended				Nine Months Ended
	September 30,				September 30,
	2017⁽¹⁾	2016			2018			2017⁽¹⁾
Weighted average grant date fair value (per share)	N/A	$	26.90		$	9.62		N/A
Risk-free interest rate	N/A		0.6	%		2.4	%	N/A
Expected dividend yield	N/A		0.0	%		0.0	%	N/A
Expected volatility	N/A		56.9	%		77.0	%	N/A
Expected term (in years)	N/A	1.3				1.3		N/A

The following table summarizes the allocation of stock-based compensation expense (in thousands):

	Three Months Ended				Nine Months Ended				Three Months Ended				Nine Months Ended
	September 30,				September 30,				September 30,				September 30,
	2017		2016		2017		2016		2018		2017		2018		2017
Cost of sales	$	264	$	267	$	1,022	$	776	$	784	$	264	$	1,129	$	1,022
Selling, general & administrative		1,961		2,320		8,423		6,992		6,821		1,961		9,833		8,423
Research and development		167		318		1,057		965		1,932		167		2,465		1,057
Total	$	2,392	$	2,905	$	10,502	$	8,733	$	9,537	$	2,392	$	13,427	$	10,502

The total stock-based compensation expense capitalized as part of the cost of inventory was ~~$0.3~~$0.7 million and $0.2 million atas of September 30, ~~2017~~2018 and December 31, ~~2016,~~2017, respectively.

From time to time, the Company may be subject to legal proceedings, ~~regulatory encounters or~~disputes and other ~~matters~~claims arising in the ordinary course of business, including actions with respect to intellectual property, employment, product liability and contractual matters. In connection with these matters, the Company regularly assesses ~~on a regular basis,~~ the probability and amount or range of possible loss based on the developments in these matters. A liability is recorded in the financial statements if it is determined that it is probable that a material loss has been incurred, and that the amount or range of the loss can be reasonably estimated. Because of ~~the~~ uncertainties related to ~~the occurrence, amount, and range of loss on~~ any pending actions, the Company is currently unable to predict their ultimate outcome, and, with respect to any ~~pending litigation~~legal proceeding or claim where no liability has been accrued, to make a meaningful estimate of the reasonably possible loss or range of loss that could result from an ~~unfavorable~~adverse outcome. AtAs of September 30, ~~2017~~2018 and December 31, ~~2016,~~2017, there were no legal proceedings, ~~regulatory encounters~~disputes or other ~~matters~~claims for which ~~the negative outcome~~a material loss was considered probable or for which the amount or range of loss was reasonably estimable. However, regardless of the outcome, legal proceedings, disputes and other claims can have an adverse impact on the Company because of legal costs, diversion of management time and resources, and other factors.

~~On October 9, 2017, the Company effected a 1-for-10 reverse stock split~~Item 2. Management’s Discussion and Analysis of ~~its issued~~Financial Condition and ~~outstanding shares~~Results of common stock. The par value per share and the authorized number of shares of common stock and preferred stock were not adjusted as a result of the reverse stock split. All common stock share and per-share amounts for all periods presented in these condensed financial statements have been adjusted to reflect the reverse stock split. The number of authorized shares of common stock remains at 100 million shares.Operations

On October 17, 2017, the Company completed a registered public offering of 4,630,000 shares of its common stock, Series A warrants to purchase up to 4,630,000 shares of its common stock and Series B warrants to purchase up to 4,630,000 shares of its common stock, at a public offering price of $3.50 per share and accompanying warrants. The gross proceeds to the Company from the offering were approximately $16.2 million, before deducting underwriting discounts and commissions and other offering expenses payable by the Company. The Series A warrants have an exercise price of $3.50 per share, are immediately exercisable, and will expire on the 5-year anniversary of the date of issuance. The Series B warrants have an exercise price of $3.50 per share, are immediately exercisable, and will expire on the 6-month anniversary of the date of issuance. As a result of the completion of the financing, the Company has satisfied the equity financing covenant in the Term Loan Agreement, although it remains subject to additional covenants.

You should read the following discussion and analysis together with our financial statements and related notes in Part I, Item 1 of this Quarterly Report on Form 10-Q for the ~~period~~quarter ended September 30, ~~2017,~~2018, or this Quarterly Report.

This Quarterly Report contains forward-looking statements within the meaning of the federal securities ~~laws.~~laws, which statements are subject to considerable risks and uncertainties. These forward-looking statements are intended to qualify for the safe harbor from liability established by the Private Securities Litigation Reform Act of 1995. All statements included or incorporated by reference in this Quarterly Report, other than statements of historical fact, are forward-looking statements. You can identify forward-looking statements by the use of words such as “may,” “will,” “could,” “anticipate,” “expect,” “intend,” “believe,” “continue” or the negative of such terms, or other comparable terminology. Forward-looking statements also include the assumptions underlying or relating to such statements. In particular, forward-looking statements contained in this Quarterly Report may relate to, among other things, our future or assumed financial condition, ~~(including our ability to continue as a going concern),~~ results of operations, liquidity, business forecasts and plans, research and product development plans, manufacturing plans, strategic plans and objectives, capital needs and financing plans, product launches, regulatory approvals and competitive ~~environment, and the application of accounting guidance.~~environment. We caution you that the foregoing list may not include all of the forward-looking statements made in this Quarterly Report.

Our forward-looking statements are based on our management’s current assumptions and expectations about future events and trends, which affect or may affect our business, strategy, operations or financial performance. Although we believe that these forward-looking statements are based upon reasonable assumptions, they are subject to numerous known and unknown risks and uncertainties and are made in light of information currently available to us. Our actual financial condition and results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth below in the section entitled “Risk Factors” in Part II, Item 1A, and elsewhere in this Quarterly Report. You should read this Quarterly Report with the understanding that our actual future financial condition and results may be materially different from and worse ~~from~~than what we expect.

Moreover, we operate in an evolving environment. New risk factors and uncertainties emerge from time to time and it is not possible for our management to predict all risk factors and uncertainties, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements.

Forward-looking statements speak only as of the date they were made, and, except to the extent required by law or the rules of the NASDAQ Global Market, we undertake no obligation to update or review any forward-looking statement because of new information, future events or other factors.

We qualify all of our forward-looking statements by these cautionary statements.

We are a medical device company with an innovative approach to the design, development and commercialization of products for people with insulin-dependent diabetes. We believe ~~that~~ our competitive advantage is rooted in our unique consumer-focused approach, and ~~proprietary~~the incorporation of modern and innovative technology ~~platform. This allows us to deliver innovative hardware~~into our product offerings. Our manufacturing and software solutions to meet the various needs and preferences of people with diabetes and their healthcare providers. We manufacture and sell insulin pump products in the United States that are designed to address large and differentiated segments of the insulin-dependent diabetes market. Our insulin pump products include:

We have shipped more than 60,000 insulin pumps since our initial launch in August 2012, of which nearly 56,000 pumps have been shipped within the four years ended September 30, 2017. For the past three consecutive years, our company has been ranked #1 bysmallest durable insulin pump ~~users~~available, and the only pump currently available in the United States ~~for~~that is capable of remote feature updates, which positions us well to address the evolving needs and preferences of differentiated segments of the insulin-dependent diabetes market. By delivering innovative hardware and software solutions, as well as best-in-class customer support, ~~in an independent survey by dQ&A, a leading~~we aim to improve and simplify the lives of people with diabetes ~~research firm.~~and their healthcare providers.

We ~~have successfully launched five insulin pump products, beginning with~~began commercial sales in the ~~commercialization~~United States of our first insulin pump, ~~the t:slim Insulin Delivery System, or~~ t:slim, in August 2012. ~~During~~Subsequently, we commercialized t:flex in May 2015, t:slim G4 in September 2015 and t:slim X2 in October 2016. The t:slim X2 technology platform now represents 100% of our new pump shipments, but we continue to provide ongoing service and support to existing t:slim, t:slim G4 and t:flex customers.

In June 2018, we received approval by the United States Food and Drug Administration (FDA) for t:slim X2 with Basal-IQ technology, our first-generation Automated Insulin Delivery (AID) algorithm. We commenced commercial sales of this product in the United States in August 2018. This system uses Dexcom G6 continuous glucose monitoring (CGM) sensor values to adjust the rate of insulin delivery to help minimize the frequency and/or duration of hypoglycemic events. In the second quarter of 2018, the FDA also created a new interoperability designation for integrated continuous glucose monitoring (iCGM) devices. Our t:slim X2 with Basal-IQ technology was the first insulin pump to receive approval for iCGM compatibility, which we expect will streamline the regulatory pathway for integration with future iCGM products approved by the FDA.

In August 2018, we commenced commercial sales in select international geographies of two additional insulin pumps: t:flex and the t:slim G4 Insulin Delivery System, or t:slim G4, the first continuous glucose monitoring, or CGM, enabled pump with touchscreen simplicity. In October 2016, we commenced commercial sales ofour t:slim X2 ~~and discontinued new sales~~insulin pump, which is capable of ~~t:slim. In August 2017, we commenced commercial sales of t:slim X2 with Dexcom~~displaying Dexcom’s G5 Mobile ~~CGM integration and discontinued new sales of t:slim G4.~~CGM.

15Our insulin pump products are generally considered durable medical equipment, and have an expected lifespan of at least four years. In addition to selling insulin pumps, we sell disposable products that are used together with our pumps and replaced every few days, including cartridges for storing and delivering insulin, and infusion sets that connect the insulin pump to a user’s body.

Our insulin pumps are compatible with the Tandem Device Updater, a revolutionary new tool that allows pump users to update their pumps’ software quickly and easily from a personal computer. ~~Remote updatability for insulin pump software is a unique feature not available in competitive pump offerings, meaning the~~The Tandem Device Updater provides our in-warranty customers access to new and enhanced features and functionality faster than the industry has been able to in the past. ~~Its~~The first ~~cleared~~ use byof our Tandem Device Updater was for deployment of the ~~U.S. Food and Drug Administration, or FDA, was to update~~latest t:slim ~~Pumps~~software to in-warranty t:slim pumps purchased before April ~~2015 to the latest software. In August 2017,~~2015. Since that time, we ~~received FDA approval to permit~~set a new standard of care in our industry by offering all existing t:slim X2 customers ~~to update their pumps’~~two significant software ~~to allow~~updates including integration with the Dexcom G5 Mobile CGM ~~system. We are currently offering this update free of charge~~system in September 2017 and an upgrade to our 12,000 customers that purchased a t:slim X2 prior to us receiving FDA approval for G5 integration. As of September 30, 2017, approximately one third of these customers have elected to update their pump. Of the t:slim X2 Pump users who have updated their pump’s software, more than 85% indicated they were satisfied or extremely satisfied with the update process.new Basal-IQ technology at no cost in August 2018. In the future, ~~the Tandem Device Updater~~this tool has the potential to enable users to add other new features and functionality to their pumps ~~such as automated insulin delivery, or AID, algorithms,~~ independent of the typical four-year insurance pump ~~replacement~~reimbursement cycle.

~~In September 2017, we commenced commercial sales of products using the t:lock~~^TM Connector, or t:lock, which replaces the standard Luer-lok connector that historically joined an infusion set to our cartridge. t:lock incorporates a smaller inner cavity than the Luer-lok connector, which reduces the amount of insulin used in the process and reduces the time required to fill the infusion set tubing.

Our innovative approach to product design and development is consumer-focused and based on our extensive market research, as we believe the user is the primary decision maker when purchasing an insulin pump. Our market research consists of interviews, focus groups and online surveys to understand what people with diabetes, their caregivers and healthcare providers are seeking in order to improve diabetes therapy management. We also apply the science of human factors to our design and development process, which seeks to optimize our devices, thereby allowing users to successfully operate ~~our devices~~them in their intended environment.

We developed our products to provide the specific features that people with insulin-dependent diabetes seek in a next-generation insulin pump. Our proprietary ~~pumping~~ technology platform allows us to design the slimmest and smallest durable insulin pumps on the market, without sacrificing insulin capacity. Our ~~insulin pump~~ platform features our patented Micro-Delivery technology, and a miniaturized pumping mechanism that draws insulin from a flexible bag within the pump’s cartridge, rather than relying on a syringe and plunger mechanism. It also features an easy-to-navigate software architecture, and a vivid color ~~touchscreen and, with~~touchscreen. In addition, the t:slim X2 ~~it also~~ features an advanced Bluetooth radio capable of communicating with multiple compatible devices, such as a CGM sensor, blood glucose meter or mobile device applications. Our ~~insulin pump~~ platform has a micro-USB connection that supports a rechargeable battery and software updates through the Tandem Device Updater, as well as uploads to t:connect Diabetes Management Application, or t:connect. t:connect is our custom cloud-based data management application that provides customers and healthcare providers a fast, easy and visual way to display therapy management data from the pump and supported blood glucose meters. In April 2017, we launched the t:~~connect®~~connect HCP Portal, which is designed to streamline healthcare providers’ use of the original t:connect Application and improve office efficiency. Currently, t:connect and the Tandem Device Updater are available only in the United States.

We have rapidly increased sales since our commercial launch by expanding our sales, clinical and marketing ~~infrastructure,~~organization, by developing, commercializing and marketing multiple differentiated products that utilize our proprietary technology platform and consumer-focused approach, and by providing strong customer support. ~~In our research, approximately 86% of healthcare providers surveyed believe that providing great customer support is the most important company attribute.~~ We believe that by demonstrating our product benefits and the shortcomings of existing insulin therapies, more people will choose our insulin pumps for their therapy needs, allowing us to further penetrate and expand the market. We also believe we are positioned well ~~positioned~~ to address consumers’ needs and preferences with our current products and products under development and by offering customers ~~a pathway~~access to our future innovations through the Tandem Device Updater, as they are approved by the FDA. As we continue to develop differentiated products based on our proprietary technology platform, we intend to leverage a single sales, marketing and clinical organization in the United States, a shared manufacturing and supply chain infrastructure, and the expertise of our customer support services.

In ~~July 2017,~~the third quarter of 2018, we ~~announced plans~~established a small group of sales and customer support employees to ~~begin commercialization of t:slim X2~~commercialize our products in Canada. In other select geographies outside the United States, ~~in select geographies during 2018. Unlike~~we expect that most of our ~~approach domestically, we currently plan~~commercial sales will initially be to ~~partner with~~independent distributors who will ~~carry out the selling efforts, as well as the service~~perform all sales, customer support and ~~support of customers~~training in ~~geographies outside the United States.~~their respective territories.

Our products under development support our strategy of focusing on both consumer and clinical ~~needs.~~needs, and include AID systems, a next-generation hardware platform, and connected (mobile) health offerings. We intend to leverage our consumer-focused approach and proprietary technology platform to continue to develop products that have the features and ~~functionality~~functionalities that will allow us to target people in ~~different~~differentiated segments of the insulin-dependent diabetes ~~market. Our current pump~~market including the following products under ~~development include:~~development:

Since inception, we have derived nearly all of our sales from the shipment of insulin pumps and associated supplies in the United States. We consider the number of units shipped per quarter to be an important metric for managing our ~~business. We~~business, particularly the number of units shipped in the most recent four-year period due to typical four-year reimbursement cycles.

In the United States, we have shipped more than ~~60,000 insulin~~70,000 pumps ~~since our initial launch in August 2012, of which nearly 56,000 pumps have been shipped~~ within the ~~four years~~four-year period ended September 30, ~~2017.~~2018. Pump shipments ~~are broken down by product and~~in the United States by fiscal quarter are as follows:

	Pump Units Shipped for Each of the Three Months Ended in Respective Years⁽¹⁾⁽²⁾											Pump Units Shipped for Each of the Three Months Ended in Respective Years⁽¹⁾ - U.S.
	Total											Total
	March 31		June 30		September 30		December 31			Total		March 31		June 30		September 30		December 31		Total
2012		—		9		204		844			1,057		-		9		204		844		1,057
2013		852		1,363		1,851		2,406			6,472		852		1,363		1,851		2,406		6,472
2014		1,723		2,235		2,935		3,929			10,822		1,723		2,235		2,935		3,929		10,822
2015		2,487		3,331		3,431		6,234			15,483		2,487		3,331		3,431		6,234		15,483
2016		4,042		4,582		3,896		4,418			16,938		4,042		4,582		3,896		4,418		16,938
2017		2,816		3,427		3,868	N/A				10,111		2,816		3,427		3,868		6,950		17,061

	t:slim
	March 31		June 30		September 30		December 31			Total
2012	N/A			9		204		844			1,057
2013		852		1,363		1,851		2,406			6,472
2014		1,723		2,235		2,935		3,929			10,822
2015		2,487		2,957		2,390		1,658			9,492
2016		1,255		1,498		1,965		76	⁽⁴⁾		4,794

	t:slim X2⁽³⁾
	March 31		June 30		September 30		December 31			Total
2016	N/A		N/A		N/A			3,699			3,699
2017		2,576		3,209		3,709	N/A				9,494

	t:flex
	March 31		June 30		September 30		December 31			Total
2015	N/A			374		555		569			1,498
2016		371		493		389		354			1,607
2017		195		199		152	N/A				546

	t:slim G4
	March 31		June 30		September 30		December 31			Total
2015	N/A		N/A			486		4,007			4,493
2016		2,416		2,591		1,542		289	⁽⁴⁾		6,838
2017		45		19		7	N/A				71
2018													4,444		5,447		7,379	N/A			17,270

International pump shipments, which began in the third quarter of 2018, by fiscal quarter are as follows:

InBeginning in the third quarter of 2016 through the third quarter of 2017, we ~~launched~~offered a Technology Upgrade Program that provided eligible t:slim and t:slim G4 customers a path towards ownership of t:slim X2 or, as of August 2017, t:slim X2 with G5, by offering customers the right to exchange their t:slim or t:slim G4 for t:slim X2 or t:slim X2 with G5, under a variable pricing ~~structure. The Program expired on September 30, 2017.~~

structure, as a pathway for certain existing customers to obtain the t:slim X2 insulin pump. Due to the high degree of accounting complexity, the ~~Technology Upgrade Program~~program created unpredictable financial results under ~~United States generally accepted accounting principles, or~~U.S. GAAP for the duration of the ~~Program.~~program. The accounting treatment for the ~~Program~~program required ~~the deferral of~~us to defer up to 100% of sales ~~and cost of sales for shipments of eligible pumps beginning in~~at the ~~third quarter of 2016. The amount of sales and cost of sales deferred varied based on a number of factors, including the model~~time of pump ~~involved~~shipment and recognize them in a subsequent period, either when the ~~timing~~upgrade was fulfilled or at the expiration of the initial sales relative to the availability of certain future products. In general, the deferrals required by the Program had the effect of initially decreasing our GAAP sales, primarily in 2016, even when the number of our pump shipments increased.

program. We recognized the deferred amount of sales and cost of sales at the earlier of when the obligations under the ~~Technology Upgrade Program~~program were satisfied or upon the expiration of the ~~Program.~~program. If a customer elected to participate in the ~~Program,~~program, we recognized any upgrade fees that we received and the associated costs at the time of fulfilling the given obligation. ~~We recognized the majority of the remaining deferred sales and cost of sales in the quarter ended~~The program expired on September 30, 2017 when the Program expired. At September 30, 2017, we had $0.2 million of current liabilities for deferred sales associated with the Program, as well as $0.2 million of deferred cost of sales, associated with upgrade requests received that will be fulfilled in the fourth quarter of 2017.and, therefore, has no impact on our 2018 financial results.

For the nine months ended September 30, ~~2017~~2018 and ~~2016,~~2017, our sales were ~~$67.3~~$107.6 million and ~~$55.3~~$67.3 million, respectively. For the nine months ended September 30, 2017, this included incremental net sales of $4.8 million ~~with a corresponding increase of $3.2 million in gross profit~~ as a result of the Technology Upgrade Program. For the nine months ended September 30, ~~2016, this included a~~ ~~deferral of sales of~~ ~~$8.4 million with a corresponding deferral of $1.4 million in cost of sales as a result of the Program. For the nine months ended September 30,~~2018 and 2017, ~~and 2016,~~ our net loss was ~~$61.6~~$126.3 million and ~~$68.6~~$61.6 million, respectively. Our accumulated deficit as of September 30, ~~2017~~2018 was ~~$466.2~~$603.8 million.

Overall, we have experienced considerable sales growth since the commercial launch of ~~t:slim~~our first product in the third quarter of 2012, while incurring operating losses since our inception. Our operating results ~~fluctuate~~have historically fluctuated on a quarterly or annual basis, particularly in ~~the~~ periods surrounding anticipated ~~and actual~~ regulatory approvals, and ~~initial stages of commercialization of our new products and those of our competitors. These fluctuations were more pronounced for the duration of the Technology Upgrade Program.~~

~~In particular, we believe that the timing of~~ the commercial launch of ~~t:slim X2,~~products by us and our competitors.

We believe that our financial condition and operating results, as well as the ~~launch~~decision-making process of our customers, has been and ~~regulatory approval of competitive products, impacted our quarterly pump shipments since the second half of 2016. In the period leading up~~will continue to the commercial launch of t:slim X2 in October 2016, we believe there was an increasing number of potential customers who delayed their purchasing decision until they could include t:slim X2 and competitive products in their decision-making process. In addition, pump shipments were impacted by a decision by UnitedHealthcare that restricted a majority of their members from accessing our pumps.

~~In the third quarter of 2017, we~~ ~~believe our sales results were~~be impacted by a number of ~~additional factors, including:~~

~~In addition to the factors discussed above, we expect our financial results will fluctuate in the future due to a variety of factors, including:~~

~~We expect~~In particular, we believe the ~~combined effect of the timing of our launch of t:slim X2 with G5~~following specific factors have, and ~~our expectation that customers will largely return~~could continue to, ~~their historical decision-making patterns will once again result in our sales being heavily weighted towards the second half of the year. We expect seasonality will have a similar~~materially impact ~~on our sales in 2017 as in years prior to launch of the Technology Upgrade Program, excluding approximately $4.8~~ ~~million of deferred sales and upgrade fees received associated with our Technology Upgrade Program that we recognized in the third quarter of 2017.~~

In late August 2017, the FDA approved, and we commercially launched our t:slim X2 Insulin Pump with Dexcom G5 Mobile CGM integration. The t:slim X2 with G5 is our first sensor-augmented insulin pump approved to allow users to make treatment decisions without pricking their finger. The pump conveniently displays a user’s insulin delivery activity and Dexcom G5 Mobile CGM data together on one single device. The t:slim X2 with G5 has been approved for users ages six and older.

In September 2017, we commenced commercial sales of our insulin pump cartridges and infusion sets with our t:lock Connector. t:lock was designed to look and feel like the previous Luer-lok connector. However, t:lock incorporates a smaller inner cavity, which reduces the amount of insulin used in the process and reduces the time required to fill the infusion set tubing, improving efficiency and customer experience.

~~On October 5, 2017, Johnson & Johnson announced that~~ it intends to discontinue the operations of Animas Corporation and to exit the insulin pump business entirely, and that, in connection with these activities, it designated Medtronic as a preferred partner to facilitate the transition of Animas insulin pump customers. As part of this transition, Medtronic is offering a portion of Animas customers the option of acquiring a prior-generation Medtronic insulin pump at no charge. We now offer the only alternative durable insulin pump to Medtronic in the United States. While this announcement represents a significant change within our industry, and we have experienced a recent increase in inquiries from current Animas customers following the announcement, it is too early to know how it will ultimately influence our business ~~or the competitive landscape in which we operate, although we expect the impact may be dependent on one or more of the following factors:~~going forward:

~~Reverse Stock Split~~For 2018, in addition to working to achieve our sales growth expectations, we intend to continue to leverage our infrastructure investments to realize additional manufacturing, sales, marketing and administration cost efficiencies to improve our operating margins, including costs associated with our international launch plans. We believe we can ultimately achieve profitability by driving incremental sales growth, meeting our pump renewal sales objectives, increasing gross profits from additional sales of infusion sets, maximizing manufacturing efficiencies on increased production volumes and leveraging the investments made in our sales, clinical, marketing and customer support organizations.

At a special meeting of our stockholders, held on September 7, 2017, our stockholders approved an amendment to our amended and restated certificate of incorporation to effect a reverse stock split of our issued and outstanding shares of common stock at a ratio of not less than 1-for-8 and not greater than 1-for-12, with the exact ratio to be set within that range by our board of directors, without further approval or authorization of our stockholders. On October 4, 2017, our board of directors approved the reverse stock split at a ratio of 1-for-10, and on October 9, 2017, we filed an amendment to our amended and restated certificate of incorporation with the Delaware Secretary of State to effect the reverse stock split.Recent Developments

~~Unless otherwise noted, all share and per share amounts set forth in this Quarterly Report have been adjusted to reflect the impact~~FDA Approval of ~~the reverse stock split.~~

On October 17, 2017, we completed a registered public offering of 4,630,000 shares of our common stock, Series A warrants to purchase up to 4,630,000 shares of our common stock and Series B warrants to purchase up to 4,630,000 shares of our common stock at a public offering price of $3.50 per share and accompanying warrants, which we refer to as the October Financing. The gross proceeds to the Company from the October Financing were approximately $16.2 million, before deducting underwriting discounts and commissions and other offering expenses payable by the Company. The Series A warrants have an exercise price of $3.50 per share, are immediately exercisable, and will expire on the 5-year anniversary of the date of issuance. The Series B warrants have an exercise price of $3.50 per share, are immediately exercisable, and will expire on the 6-month anniversary of the date of issuance. Each series of warrants, if exercised by all holders in full, may result in additional gross proceeds to us of $16.2 million.

From inception through September 30, 2017, we have primarily financed our operations through sales of equity securities, and, to a lesser extent, debt financings. The continued growth of our business, including the expansion of our customer care infrastructure to support our growing base of customers, additional research and development activities, and the transition to our new manufacturing facility, will continue to increase our expenses and capital needs.

On the date that our financial statements in this Quarterly Report were issued, our management believed that we did not have sufficient cash to fund our operations for the next twelve months without additional financing, and therefore, we concluded there was substantial doubt about our ability to continue as a going concern within one year after the date the financial statements were issued. We expect we will be required to raise additional capital in order to continue as a going concern, meet our minimum liquidity requirements, and execute on our business strategy. We may seek additional capital from public or private offerings of our capital stock (including pursuant to our ATM offering), or we may elect to borrow additional amounts under new debt financing arrangements or from other sources. We expect our ability to raise additional financing may be negatively impacted by a number of factors, including our recent and projected financial results, recent changes in and volatility of our stock price, perceptions about the dilutive impact of our recent financing transactions, concerns regarding our ability to maintain the continued listing of our common stock on the NASDAQ Global Market, or NASDAQ, our current level of indebtedness and debt service costs, our conclusion that there is substantial doubt about our ability to continue as a going concern and the competitive environment in our industry.

In ~~March 2017,~~June 2018, the FDA approved our t:slim X2 Insulin Pump with Basal-IQ technology, a predictive low glucose suspend (PLGS) feature designed to help reduce the frequency and duration of low glucose events. We launched our new product in the third quarter of 2018 with Dexcom G6 CGM integration, which requires no fingersticks for calibration or diabetes treatment decisions and was the first CGM device to receive the iCGM designation from the FDA earlier this year.

In April 2018, we received CE mark approval and have entered into ~~Waiver~~distribution agreements with independent distributors for markets in Australia, Italy, New Zealand, Scandinavia, South Africa, Spain and ~~Amendment No. 4~~the United Kingdom. We began shipping into select geographies in the third quarter of 2018, where we initially intend to market our products primarily through third-party distributors. In Canada, we received regulatory approval in October 2018 and expect to begin shipping by the end of 2018, subject to the ~~Term Loan Agreement, or the Fourth Amendment. The Fourth Amendment includes a limited waiver~~completion of a potential event of default that could have resulted from the inclusion of an explanatory paragraph in the audit report of our independent registered public accounting firm included in our Annual Report on Form 10-K for the year ended December 31, 2016 (“Annual Report”) that describes conditions that raise substantial doubt about our ability to continue as a going concern.

Under the Term Loan Agreement, we are required to complete one or more financings in which our aggregate gross proceeds from the sale of equity securities was at least $30.0 million, no later than January 15, 2018. As a result of the public offering of our common stock in March 2017, the sale of our common stock pursuant to our ATM offering, and the public offering of our common stock and warrants in the October Financing, we have satisfied our obligations pursuant to this equity financing covenant, although we remain subject to additional covenants.

~~For additional information about the Term Loan Agreement, see the section entitled “Indebtedness” below.~~various pre-commercialization activities.

We believe we can ultimately achieve profitability because our existing proprietary technology platform will allow us to maximize efficiencies in the development, production, sale and marketing of multiple products differentiated ~~products.~~by software. By offering products that are all based on ~~our~~this proprietary technology platform, in combination with the flexibility provided by the Tandem Device Updater, we believe we can develop and bring to market products and functionality more rapidly, while significantly reducing our per-unit design and development costs. Due to shared product design features, our production system is adaptable to new products and we intend to leverage our shared manufacturing infrastructure to drive operational efficiencies. Further, we expect to continue to increase production volume and to reduce the per-unit production overhead cost for our pump products and their associated disposable cartridges over time. ~~We anticipate that the transition to our recently launched t:lock Connector will continue to increase in our sales of infusion sets.~~ By expanding our product offerings to address the varying needs among people in different segments of the large and growing insulin-dependent diabetes market with continued software innovation and alternative hardware platforms such as t:sport, we believe we can increase the productivity of our sales, clinical, ~~and~~ marketing, ~~organization, as well as our~~and customer support ~~infrastructure,~~organizations, thereby improving our operating margin over the long term. However, it is possible that the launch of our t:sport platform in the future may reduce the total demand for our products based on our t:slim X2 platform. In that case, it is possible that the launch of our t:sport platform may temporarily negatively impact the gross margins for our products overall.

We offer products for people with insulin-dependent diabetes. We commenced commercial sales of our original t:slim insulin pump hardware platform in the United States in the third quarter of ~~2012. We launched our second insulin pump product, t:flex,~~2012 and continued to launch various iterations of that platform in the ~~second quarter of 2015, and launched our third insulin pump product, t:slim G4, in the third quarter of 2015.~~years following. In October 2016, we began shipping our t:slim X2 insulin pump, our next generation flagship ~~product, at which time we discontinued sales of t:slim. In August 2017, we commenced commercial sales of~~product. The t:slim X2 ~~with G5 and~~hardware platform, which includes remote software update capabilities, now represents 100% of our new pump shipments. Accordingly, we have discontinued new sales of ~~t:slim G4.~~ all prior platform versions. Our products ~~currently~~also include ~~these insulin pumps, as well as~~ disposable cartridges and infusion sets. ~~We also~~In addition, we offer accessories including protective cases, belt clips, and power ~~adapters. Sales of accessories since commercial launch have~~adapters, although such sales are not ~~been~~ significant.

We primarily sell our products through national and regional distributors in the United States on a non-exclusive basis. These distributors are generally providers of medical equipment and supplies to individuals with diabetes. Our primary end customers are people with insulin-dependent diabetes. Similar to other durable medical equipment, the primary payor is generally a third-party insurance carrier and the customer is usually responsible for any medical insurance plan copay or coinsurance requirements. We believe our existing sales, clinical, and marketing infrastructure will allow us to continue to increase sales by allowing us to promote our products to a greater number of potential customers, caregivers and healthcare providers.

In the third quarter of 2018, we commenced commercial sales of t:slim X2 with Dexcom G5 Mobile CGM integration in select international geographies. With the exception of Canada where we intend to market with a direct sales force, we expect that most of our commercial sales outside the United States will initially be to independent distributors who will perform all sales, customer support and training in their respective territories. Historically, we have experienced consistent levels of reimbursement for our products in the United States, but the average sales price will vary in international markets based on a number of factors, such as the nature of the reimbursement environment, government regulations and the extent to which we rely on distributor relationships to provide sales, clinical and marketing support.

In general, we have experienced, and expect to continue to experience in the United States, product shipments being weighted heavily towards the second half of the year, with the highest percentage of product shipments expected in the fourth quarter of the ~~year.~~year due to the nature of the reimbursement environment. Consistent with prior results, we also expect product shipments from the fourth quarter to the following first quarter to decrease significantly.

In addition, our quarterly sales have fluctuated, and may continue to fluctuate, substantially in the periods surrounding anticipated and actual regulatory approvals and commercial launches of new products by us or our competitors. For instance, customers may defer a purchasing decision if they believe that a new product may be launched in the future. Additionally, upon the announcement of ~~the~~ FDA approval or commercial launch of a new product, ~~whether our own~~either by us or one of our competitors, potential new customers may reconsider their purchasing decision or take additional time to consider the anticipated or new approval or product launch in their purchasing decision. For example, we believe that our pump shipments were negatively impacted during the second half of 2016 and first half of 2017, as we announced the launches of t:slim X2 and the Technology Upgrade Program in the third quarter of 2016, and one of our competitors announced the future availability of two new products with financial incentives for adoption. However, we are not able to quantify the extent of the impact of these or similar events ~~including the launch of t:slim X2 with G5 and the transition to our t:lock Connector,~~ on future purchasing decisions.

We manufacture our pumps and disposable cartridges at our manufacturing ~~facilities~~facility in San Diego, California. Infusion sets and pump accessories are manufactured by third-party suppliers. Cost of sales includes raw materials, labor costs, manufacturing overhead expenses, product training costs, reserves for expected warranty costs, freight, scrap and inventory excess and obsolescence. Manufacturing overhead expenses include expenses relating to quality assurance, manufacturing engineering, material procurement, inventory control, facilities, equipment, information technology and operations supervision and management. ~~Historically, cost of sales has also included royalty costs associated with sales of t:slim G4.~~ ~~In August 2017, we commenced commercial sales of t:slim X2 with G5, which has no royalty obligation, and discontinued new sales of t:slim G4.~~ We anticipate that our cost of sales will continue to increase as our products ~~continue to~~ gain broader market acceptance and our product sales increase.

We expect our overall gross margin percentage, which for any given period is calculated as sales less cost of sales divided by sales, to improve over the long term, as our sales increase and we have more opportunities to spread our overhead costs over larger production volumes. We expect ~~that~~ we will be able to leverage our manufacturing cost structure across our products that utilize the same proprietary technology platform and manufacturing infrastructure, and will be able to further reduce costs with increased automation, process improvements and raw materials cost reductions. We also expect our warranty costs to decrease as we release product features and functionality utilizing the Tandem Device Updater. However, ~~we also expect~~ our overall gross margin tomay fluctuate in future quarterly periods as a result of numerous factors besides those associated with production ~~volumes. Specifically,~~volumes, such as the impact of changes in ~~2017, we are increasing~~ our ~~manufacturing capacity by relocating~~stock price on non-cash stock-based compensation, changes in our manufacturing operations and related functions to a new facility over a period of several quarters, which may add duplicative and incremental cost in the short-term and pressure our overall gross margin for the duration of the transition. warranty estimates or inventory obsolescence.

In general, we expect the gross margin on insulin pumps to be higher than the gross margin on pump-related ~~supplies, which would be consistent with our historical experience.~~supplies. Other factors impacting our overall gross margin may include the changing mix of products sold with different gross margins, the changing percentage of products sold to distributors versus directly to individual customers, varying levels of reimbursement among third-party payors and in international markets, the timing and success of new regulatory approvals and product launches, warranty and training costs, and changes in our manufacturing processes, capacity, costs or output.

Our selling, general and administrative, or SG&A, expenses primarily consist of salary, cash-based incentive compensation, fringe benefits and non-cash stock-based compensation for our executive, financial, legal, marketing, sales, clinical, customer ~~care,~~support, technical services, insurance verification, regulatory affairs and administrative functions. In particular, our sales and clinical organization consisted of approximately 70 territories as of September 30, ~~2017.~~2018 and our operations in Canada will be supported by a direct sales force of approximately 10 field representatives. Territories in the United States are maintained by sales representatives and field clinical specialists, and supported by managed care liaisons, additional sales management and other customer support personnel. We may add a small number of domestic sales territories in the near term. Other significant SG&A expenses include those incurred for product demonstration samples, commercialization activities associated with new product launches, travel, trade shows, outside legal fees, independent auditor fees, outside consultant fees, insurance premiums, facilities costs and information technology costs. ~~Although we do not contemplate an increase in the number of sales territories in the near term, we~~We expect our SG&A expenses, including the cost of our customer ~~care~~support infrastructure, to increase as our customer base ~~grows.~~ grows in the United States and international geographies. Additionally, we realized a notable increase in non-cash stock-based compensation expense in the third quarter of 2018 from the recent appreciation of our stock price, which will expect will be sustained in future quarters as a result of the valuation of certain employee option grants. Our SG&A expenses may also increase due to anticipated costs associated with additional compliance and regulatory reporting requirements.

Our research and development, or R&D, activities primarily consist of engineering and research programs associated with our products under development, as well as activities associated with our core technologies and processes. R&D expenses are primarily related to employee compensation, including salary, fringe benefits, non-cash stock-based compensation and temporary employee expenses. We also incur R&D expenses for supplies, development prototypes, outside design and testing services, depreciation, allocated facilities and information services, clinical trial costs, payments under our licensing, development and commercialization agreements and other indirect costs. We expect our R&D expenses ~~including clinical trial costs,~~ to increase as we advance our products under development and develop new products and ~~technologies.~~technologies, as well as continue to reflect a notable increase in non-cash stock-based compensation due to the impact of the recent appreciation of our stock price.

Our other income and expense primarily consists of changes in the fair value of the Series A and Series B warrants issued in our public offering of common stock in October 2017, as well as interest expense and amortization of debt discount and issuance costs associated with our Amended and Restated Term Loan Agreement, or the Term Loan Agreement, with Capital Royalty Partners II, L.P. and its affiliated funds, or CRG. In August 2018, we fully repaid amounts due under the Term Loan Agreement. ~~At September 30, 2017,~~Prior to that, there was ~~$82.3~~$82.7 million of outstanding principal under the Term Loan Agreement, which ~~accrues~~accrued interest at a coupon rate of 11.5% per ~~annum.~~ ~~We expect interest expense to increase in 2017 as a result of a higher outstanding balance under the Term Loan Agreement as compared to 2016~~ ~~(see~~annum (see the section below entitled “Indebtedness”). As a result, we recognized a loss on extinguishment of debt in the third quarter of 2018, but there will be no related interest expense or costs associated with the debt in future periods. We expect other income and expense to fluctuate from period to period due to revaluations of the outstanding Series A warrants, which expire in the fourth quarter of 2022.

	Three Months Ended						Nine Months Ended						Three Months Ended						Nine Months Ended
	September 30,						September 30,						September 30,						September 30,
(in thousands, except percentages)	2017			2016			2017			2016			2018			2017			2018			2017
Sales	$	27,003		$	12,293		$	67,306		$	55,336
Sales:
Domestic													$	43,720		$	27,003		$	105,123		$	67,306
International														2,544			-			2,544			-
Total Sales													$	46,264		$	27,003		$	107,667		$	67,306
Cost of sales		15,131			13,870			40,680			41,809			24,468			15,131			59,381			40,680
Gross profit (loss)		11,872			(1,577	)		26,626			13,527
Gross profit														21,796			11,872			48,286			26,626
Gross margin		44	%		(13	)%		40	%		24	%		47	%		44	%		45	%		40	%
Operating expenses:
Selling, general and administrative		20,125			20,683			65,077			63,768			29,506			20,125			73,048			65,077
Research and development		4,914			6,154			14,910			14,464			7,999			4,914			20,430			14,910
Total operating expenses		25,039			26,837			79,987			78,232			37,505			25,039			93,478			79,987
Operating loss		(13,167	)		(28,414	)		(53,361	)		(64,705	)		(15,709	)		(13,167	)		(45,192	)		(53,361	)
Other income (expense), net:
Interest and other income		60			34			179			258			443			60			833			179
Interest and other expense		(2,928	)		(1,434	)		(8,446	)		(4,177	)		(1,401	)		(2,928	)		(7,585	)		(8,445	)
Loss on extinguishment of debt														(5,313	)		-			(5,313	)		-
Change in fair value of stock warrants														(12,265	)		-			(69,042	)		-
Total other expense, net		(2,868	)		(1,400	)		(8,267	)		(3,919	)		(18,536	)		(2,868	)		(81,107	)		(8,266	)
Net loss	$	(16,035	)	$	(29,814	)	$	(61,628	)	$	(68,624	)	$	(34,245	)	$	(16,035	)	$	(126,299	)	$	(61,627	)

Comparison of the Three Months Ended September 30, ~~2017~~2018 and ~~2016~~2017

Sales. For the three months ended September 30, ~~2017,~~2018, sales were ~~$27.0~~$46.2 million, ~~including the recognition of $3.3~~which included $2.5 million of ~~pump~~international sales ~~originally deferred in prior periods and upgrade fees received as a result of the Technology Upgrade Program.~~that commenced this period. Sales were ~~$12.3~~$27.0 million for the same period in ~~2016, which reflect the deferral of $8.4 million of pump sales associated with the Technology Upgrade Program.~~2017.

~~Sales~~Domestic sales of insulin pumps were ~~$18.0~~$28.7 million and ~~$6.9~~$18.4 million, respectively, for the three months ended September 30, ~~2017~~2018 and ~~2016.~~2017. For the three months ended September 30, 2018, domestic sales of pump-related supplies were $15.0 million, of which $10.3 million were sales of infusion sets and $4.6 million were sales of cartridges. For the three months ended September 30, 2017, sales of pump-related supplies were $8.7 million, of which ~~$3.5 million were sales of cartridges and~~ $5.0 million were sales of infusion ~~sets. For~~sets and $3.5 million were sales of cartridges. Sales of accessories were not significant in either of the reported periods. International sales primarily consisted of insulin pumps.

The increase in sales was primarily due to a 118% increase in worldwide pump shipments to 8,434 in the third quarter of 2018 compared to 3,868 in the third quarter of 2017, which were positively impacted by new product launches in August 2018 and August 2017 and the commencement of international sales in the three months ended September 30, ~~2016,~~ 2018. Additionally, sales offrom pump-related supplies ~~were $5.3 million, of which $3.0 million were sales of cartridges and $2.2 million were sales~~increased 77% due to the September 2017 launch of infusion ~~sets.~~set products using the t:lock Connector, as well as an overall increase in our installed base of customers reordering supplies. The ratio of the number of infusion sets shipped to the number of cartridges shipped increased to ~~66%~~over 100% in the three months ended September 30, ~~2017~~2018 from ~~27%~~66% in the comparable quarter of the prior year. ~~Sales of accessories were not significant in either of the reported periods.~~

~~Excluding the impact~~Sales to domestic distributors accounted for 76% and 74% of ~~the Technology Upgrade Program, the increase in~~our total domestic sales ~~was primarily driven by an increase in sales of infusion sets to our distributors, as well as an increase in the sale of pump-related supplies to~~ ~~our growing customer base.~~ ~~Pump shipments were relatively flat in~~for the three months ended September 30, 2018 and 2017, at 3,868 compared to 3,896 for the same period in 2016, which we believe was the result of a number of factors including the highly competitive market, the impact of the hurricanes in the Southeast region of the United States, the timing of FDA approval of t:slim X2 with G5 within the third quarter, and negative perceptions regarding our financial stability compared to that of our competitors.

respectively. Our percentage of sales to distributors versus individual customers is principally determined by the mix of customers ordering our products within the period and whether or not we have a contractual arrangement with their underlying third-party insurance payor. Sales to distributors accounted for 74% and 67% of our total sales for the three months ended September 30, 2017 and 2016, respectively. Sales deferred under the Technology Upgrade Program decreased theThe percentage ~~of sales to distributors for the three months ended September 30, 2016 by five percentage points, while there~~ was ~~not a significant impact to the percentage of sales to distributors~~particularly impacted in the three months ended September 30, ~~2017.~~ ~~Excluding this impact~~2018 by the mid-2017 launch of the t:lock Connector, which resulted in ~~2016,~~greater purchases of infusion sets by our independent distributors during the ~~percentage~~period as compared to the same period during the prior year. Sales to international distributors accounted for 100% of ~~sales to distributors increased slightly in 2017.~~our total international sales.

Cost of Sales and Gross Profit ~~(Loss)~~. Our cost of sales for the three months ended September 30, ~~2017~~2018 was ~~$15.1~~$24.5 million resulting in gross profit of ~~$11.9~~$21.8 million, compared to ~~$13.9~~$15.1 million cost of sales ~~and~~for the same period in 2017 resulting in gross ~~loss~~profit of ~~$1.6 million in 2016.~~$11.9 million. The gross margin for the three months ended September 30, ~~2017~~2018 was ~~44%~~47% compared to ~~negative 13%~~44% in the same period in ~~2016.~~

2017. The ~~increase in our~~ gross profit ~~(loss)~~ for the three months ended September 30, 2017 ~~compared to~~included a $2.6 million benefit from the ~~same period~~Technology Upgrade Program in ~~2016~~place at that time, which benefited the corresponding gross margin by 5 percentage points.

Excluding the impact of the Technology Upgrade Program, the increase in our gross profit for the three months ended September 30, 2018 was primarily the result of the ~~impact of the Technology Upgrade Program. During the three months ended September 30, 2017, our gross profit included a net recognition of $2.6 million of gross profit that had been deferred~~increase in ~~prior periods, partially offset by an immaterial cost incurred for the fulfillment of upgrades. In the same period of 2016, our gross profit was reduced by a net deferral of $7.0 million of~~ pump sales under the terms of the Program. Additionally, we recorded a $1.1 million charge in the three months ended September 30, 2016 for inventory obsolescence as a result of the commercialization of the t:slim X2 Pump, launch of the Technology Upgrade Program and associated decrease in the overall demand for our t:slim G4 Pump. This charge negatively impacted our gross margin during the three months ended September 30, 2016 by nine percentage points.

shipments. Gross profit and gross margin also increased as a result of per unit manufacturing cost improvements ~~including significant raw material cost reductions for our pumps~~from higher sales volumes and overall manufacturing efficiencies, even taking into account the incremental costs associated with the doubling of our manufacturing capacity in ~~labor and overhead for both pumps and cartridges. Other~~our new Barnes Canyon facility, as well as the doubling of sales of our infusion sets. Additionally, we recognized a notable increase in non-cash stock-based compensation to $0.8 million in the three months ended September 30, 2018 from $0.3 million in the prior year, due to the impact of the recent stock appreciation of our stock price. As a whole, other non-manufacturing costs, which primarily consist of warranty, freight and training costs, also reflected ~~improvement, most notably demonstrated by a decrease in warranty expense as a result of improvements in our warranty trends and warranty replacement costs.~~improvement.

~~The~~We expect the most significant factors impacting our gross margin ~~was also impacted by an increase in~~will continue to be the percentage of our pump sales ~~of pump-related supplies, which generally~~relative to total sales, as our pumps have ~~lower~~higher gross margins than our ~~insulin pumps.~~pump-related supplies. We also expect the gross margin on our pump sales to improve as the volume of our pump sales increases. However, we ~~continue~~are also continuing to experience aan increasingly positive gross margin associated with the sale of our pump-related supplies as a whole, after first achieving a positive gross margin in the fourth quarter of 2016. ~~We have maintained a positive quarterly gross margin since that time.~~ We expect to continue to see improvements in the gross profit and gross margin associated with our pump-related supplies as we manufacture higher volumes of cartridges to support our growing installed base and continue to increase sales of infusion ~~sets to distributors with the launch of our t:lock Connector.~~sets.

Selling, General and Administrative Expenses. SG&A expenses ~~decreased 3%~~increased 47% to ~~$20.1~~$29.5 million for the three months ended September 30, ~~2017~~2018 from ~~$20.7~~$20.1 million for the same period in ~~2016.~~2017.

Employee-related expenses for our SG&A functions comprise the majority of ~~the~~ SG&A expenses.The ~~decrease in SG&A expenses~~increase compared to ~~2016~~2017 was primarily athe result of a ~~reduction~~$4.1 million increase in ~~our headcount-related costs~~salaries, incentive compensation and other employee benefits as well as an increase of $4.9 million in non-cash stock-based compensation. The increase in stock-based compensation expense for the ~~third quarter of 2017, compared~~three months ended September 30, 2018 to $6.8 million is primarily due to the ~~same period~~recent appreciation of ~~2016. Our SG&A headcount declined 8% compared~~our stock price. This higher level of expense is expected to ~~2016. Additionally, we have implemented efforts to control other spending, resulting~~continue in ~~decreases in travel and entertainment, outside services, supplies and consulting.~~future quarters.

Research and Development Expenses. R&D expenses ~~decreased 20%~~increased 63% to ~~$4.9~~$8.0 million for the three months ended September 30, ~~2017~~2018 from ~~$6.2~~$4.9 million for the same period in ~~2016.~~2017. The ~~decrease~~increase in R&D expenses was primarily the result of an increase in non-cash stock-based compensation of $1.8 million, as well as an increase of $1.4 million in salaries, incentive compensation and other employee benefits. The increase in stock-based compensation expense for the three months ended September 30, 2018 to $1.9 million is primarily due to the recent valuation of certain employee stock option grants and the significant appreciation of our stock price. This higher ~~costs~~level of expense is expected to continue in ~~2016 associated with product pipeline development efforts, primarily related to supplies and technology license fees~~.future quarters.

Other Income and Expense. Other expense for the three months ended September 30, 2018 and 2017 ~~and 2016~~ was ~~$2.9~~$18.5 million and ~~$1.4~~$2.9 million, respectively. Other expense for ~~both periods~~the three months ended September 30, 2018 was primarily comprised of a $12.3 million revaluation loss from the change in the fair value of the Series A warrants due to the significant appreciation of our stock price, as well as a $5.3 million loss on extinguishment of debt associated with the full repayment of our Term Loan Agreement in August 2018. Other expense for the three months ended September 30, 2017 was primarily comprised of interest expense associated with the Term Loan Agreement. ~~The~~Prior to the repayment, the outstanding principal ~~balances~~balance under the Term Loan Agreement ~~were $82.3 million and $45.8 million as of~~ ~~September 30, 2017~~ ~~and September 30, 2016, respectively. Other income for both periods presented~~ was ~~not significant.~~$82.7 million. There will be no interest expense or other costs associated with the Term Loan Agreement in future periods.

Sales. For the nine months ended September ~~September~~ 30, ~~2017,~~2018, sales were $107.6 million which included $2.5 million of international sales that commenced in the third quarter of 2018. Sales were $67.3 million ~~including~~for the ~~recognition~~same period in 2017, which included incremental net sales of $4.8 million ~~pump sales originally deferred in prior periods and upgrade fees received~~ as a result of the Technology Upgrade ~~Program. Sales were $55.3 million for the same period~~Program in ~~2016, which reflect the deferral of $8.4 million pump sales associated with the Technology Upgrade Program.~~place at that time.

~~Sales~~Domestic sales of insulin pumps were ~~$43.9~~$67.0 million and ~~$41.2~~$44.3 million, respectively, for the nine months ended September 30, ~~2017~~2018 and ~~2016.~~2017. For the nine months ended September 30, 2018, sales of pump-related supplies were $37.8 million, of which $25.7 million were sales of infusion sets and $11.8 million were sales of cartridges. For the nine months ended September 30, 2017, sales of pump-related supplies were $23.0 million, of which ~~$9.7 million were sales of cartridges and~~ $13.0 million were sales of infusion ~~sets. For the nine months ended September 30, 2016, sales of pump-related supplies were $14.2 million, of which $8.2~~sets and $9.7 million were sales of ~~cartridges~~cartridges. Sales of accessories were not significant in either of the reported periods. International sales primarily consisted of insulin pumps.

The increase in sales was primarily due to an 81% increase in worldwide pump shipments to 18,325 in the first nine months of 2018 compared to 10,111 in the first nine months of 2017, which were positively impacted by the August 2018 launch of t:slim X2 with Basal-IQ technology and ~~$5.8 million were sales~~the August 2017 launch of ~~infusion sets.~~t:slim X2 with G5. The ratio of the number of infusion sets shipped to the number of cartridges shipped increased to ~~60%~~over 100% in the nine months ended September 30, ~~2017~~2018 from ~~25%~~60% in the same period in ~~2016. Sales of accessories were not significant in either of the reported periods.~~2017.

Excluding the impact of the Technology Upgrade Program, the decrease in pump sales was primarily driven by a 19% decrease in aggregate pump shipments from 12,520 for the nine months ended September 30, 2016Sales to 10,111 for the same period in 2017 for reasons similar to those described in the three month discussion above. Additionally, the period ended June 30, 2016 represented the last period in which all UnitedHealthcare members had access to our products due to their decision to designate one of our competitors as their preferred, in-network durable medical equipment provider of insulin pumps for most customers over the age of 18, which was effective July 1, 2016~~. The decrease in pump sales was partially offset by an increase in sales of infusion sets to our distributors, as well as overall pump-related supplies to~~ ~~our growing customer base.~~

~~Sales to~~domestic distributors accounted for ~~73%~~78% and ~~74%~~73% of our total domestic sales for the nine months ended September 30, 2018 and 2017, ~~and 2016, respectively.~~respectively, driven by the mid 2017 launch of the t:lock Connector. Sales to international distributors accounted for 100% of our total international sales.

Cost of Sales and Gross Profit ~~(Loss)~~. Our cost of sales for the nine months ended September 30, ~~2017~~2018 was ~~$40.7~~$59.4 million resulting in gross profit of ~~$26.6~~$48.3 million, compared to ~~$41.8~~$40.7 million of cost of sales ~~and~~for the same period in 2017 resulting in gross profit of ~~$13.5 million in 2016.~~$26.6 million. The gross margin for the nine months ended September 30, ~~2017~~2018 was ~~40%~~45% compared to ~~24%~~40% in the same period in ~~2016.~~2017. The gross profit for the three months ended September 30, 2017 included a $3.2 million benefit from the Technology Upgrade Program in place at that time, which benefited the corresponding gross margin by 3 percentage points.

~~The increase in our~~Excluding the impact of the Technology Upgrade Program, the gross ~~profit~~margin increased for the nine months ended September 30, ~~2017~~2018 compared to the same period in ~~2016 was~~2017 primarily the result of the Technology Upgrade Program. During the nine months ended September 30, 2017, our gross profit included $3.5 million that had been deferred in prior periods, partially offset by $0.3 million incurred for the fulfillment of upgrades. In the same period of 2016, our gross profit was reduced by a net deferral of $7.0 million of pump sales eligible under the Program. Additionally, we recorded a $1.1 million charge in the nine months ended September 30, 2016 for inventory obsolescence as described previously.

~~Gross profit and gross margin also increased~~ as a result of ~~manufacturing~~an increase in pump shipments which have higher gross margins than pump-related supplies, as well as per unit cost improvements ~~including raw material cost reductions for our pumps and~~on all products, increased ~~cartridge~~ production volumes, and ~~cartridge labor and manufacturing efficiencies, as well as~~ a decrease in ~~warranty expense as a result of improvements in our warranty trends and warranty replacement~~other non-manufacturing costs.

~~The gross margin was also impacted by an increase in sales of pump-related supplies, which generally have lower gross margins than our insulin pumps.~~

Selling, General and Administrative Expenses. SG&A expenses increased 2%12% to ~~$65.1~~$73.0 million for the nine months ended September 30, ~~2017~~2018 from ~~$63.8~~$65.1 million for the same period in ~~2016.~~2017.

Employee-related expenses for our SG&A functions comprise the majority of the SG&A expenses.The increase in SG&A expenses was primarily ~~the result~~due to an increase of~~a $1.1~~ $6.6 million ~~non-cash stock-based~~in salaries, incentive compensation ~~charge associated with the suspension of our ESPP in 2017,~~and other employee benefits, as well as ~~other net increases~~an increase of $1.4 million in ~~employee expenses of $0.9 million~~non-cash stock-based compensation. ~~. Other SG&A expenses, including costs for outside services, marketing and promotional activities, tradeshows and travel, decreased $0.7 million between periods.~~

Research and Development Expenses. R&D expenses increased 3%37% to ~~$14.9~~$20.4 million for the nine months ended September 30, ~~2017~~2018 from ~~$14.5~~$14.9 million for the same period in ~~2016.~~2017. The increase in R&D expenses was primarily the result of employee-related expenses. This includes a $2.4 million increase in salaries, incentive compensation and other employee benefits and an increase of ~~$0.7~~$1.4 million ~~of employee-related expenses, which includes a $0.4 million~~in non-cash stock-based ~~compensation charge~~compensation. Additionally, we recognized an increase of $2.2 million associated with ~~the suspension of~~ ~~our ESPP in 2017. This increase was offset by a reduction in non-employee-related expenses, primarily consulting and supplies, for the advancement of our product pipeline.~~clinical trial costs.

Other Income and Expense. Other expense for the nine months ended September 30, 2018 and 2017 ~~and 2016~~ was ~~$8.4~~$81.1 million and ~~$4.2~~$8.3 million, respectively. Other expense for ~~both periods~~the nine months ended September 30, 2018 was primarily comprised of a $69.0 million revaluation loss from the change in the fair value of the Series A and Series B warrants due to the significant appreciation in our stock price in recent months, $7.6 million of interest expense associated with the Term Loan Agreement, as well as a $5.3 million loss on extinguishment of debt associated with the full repayment of our Term Loan Agreement in August 2018. Other expense for the nine months ended September 30, 2017 was primarily comprised of interest expense associated with the Term Loan Agreement. ~~The~~Prior to the repayment, the outstanding principal ~~balances~~balance under the Term Loan Agreement ~~were $82.3 million and $45.8 million as of~~ ~~September 30, 2017~~ ~~and September 30, 2016, respectively. Other income for both periods presented~~ was ~~not significant.~~$82.7 million. There will be no interest expense or other costs associated with the Term Loan Agreement in future periods.

AtAs of September 30, ~~2017,~~2018, we had ~~$22.5~~$113.6 million in cash and cash equivalents and short-term investments. We believe that our cash and cash equivalents and short-term investments ~~which included $10.0 million of restricted~~ ~~cash as required by~~balance is sufficient to satisfy our liquidity requirements for at least the ~~Term Loan Agreement. At~~next 12 months from the date the financial statements in this Quarterly Report were issued, our management believed that we did not have sufficient cash to fund our operations for the next twelve months without additional financing and, therefore, we concluded there was substantial doubt about our ability to continue as a going concern within one year after the date the financial statements were issued. ~~The financial statements included in this Quarterly Report have been prepared on a basis that assumes that we will continue as a going concern,~~ which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business. This financial information and these financial statements do not include any adjustments that may result from the outcome of this ~~uncertainty.~~filing.

Historically, our principal sources of cash have included private placements and public offerings of equity securities, ~~the Term Loan Agreement,~~debt financing, and cash collected from product sales. ~~Our historical cash outflows have primarily been associated with cash used for operating activities such as~~Since the ~~expansion and support~~beginning of our sales and marketing infrastructure, increase in our R&D activities, the acquisition of intellectual property, expenditures related to equipment and improvements used to increase our manufacturing capacity and improve our manufacturing efficiency, overall facility expansion, and other working capital needs.

~~Management currently believes that it~~Our historical cash outflows have primarily been associated with cash used for operating activities such as the development and commercialization of our products and expansion and support of our sales, marketing, clinical and customer support organizations, an increase in our R&D activities, the acquisition of intellectual property, expenditures related to increases in our manufacturing capacity and improvements to our manufacturing efficiency, overall facility expansion, and other working capital needs. Additionally, we have used cash to pay the interest expense associated with our Term Loan Agreement. The outstanding balance associated with the Term Loan Agreement was fully repaid in August 2018, which will ~~be necessary for us to raise additional funding. However, we~~result in no interest expense or other costs associated with the Term Loan Agreement in future periods.

We expect our sales performance and the resulting operating income or loss, as well as the status of each of our new product development programs, will significantly impact our cash flow from operations, liquidity position and cash management decisions. Our ability to raise additional financing may be negatively impacted by a number of factors, including our recent and projected financial results, recent changes in and volatility of our stock price, perceptions about the ~~recent completion of a public offering~~dilutive impact of our common stock and warrants, concerns regarding our ability to maintain the continued listing of our common stock on NASDAQ, our current level of indebtedness and debt service costs, our conclusion that there is substantial doubt about our ability to continue as a going concern,recent financing transactions, the competitive environment in our industry, and ~~accounting complexities brought about by our Technology Upgrade Program. There can be no assurance that we will be able to complete any financing on acceptable terms or at all.~~

~~We expect that, in addition to~~uncertainties regarding the outcome of any additional financing activities, our sales performance and the resulting operating income or loss, as well as the status of each of our new product development programs, will significantly impact our cash management decisions. regulator environment.

The following table shows a summary of our cash flows for the nine months ended September 30, ~~2017~~ 2018 and ~~2016:~~2017:

	Nine Months Ended September 30,						Nine Months Ended September 30,
(in thousands)	2017			2016			2018			2017
Net cash provided by (used in):
Operating activities	$	(54,495	)	$	(47,591	)	$	(22,451	)	$	(54,495	)
Investing activities		4,201			5,873			(84,148	)		4,201
Financing activities		17,695			16,586			115,227			25,695
Total	$	(32,599	)	$	(25,132	)	$	8,628		$	(24,599	)

Operating activities. Net cash used in operating activities was ~~$54.5~~$22.5 million for the nine months ended September 30, ~~2017,~~2018, compared to ~~$47.6~~$54.5 million for the same period in ~~2016.~~2017. The ~~increase~~decrease in net cash used in operating activities was primarily associated with a reduction in net loss when adjusted for non-cash expenses, particularly the change in the fair value of Series A and Series B warrants, loss on extinguishment of debt and increased stock-based compensation expense discussed above, as well as net changes in working ~~capital, partially offset by a decrease in net loss.~~capital. The net changes in working capital were primarily due to ~~decreases~~reductions in inventory levels based on continued high sales demand and a reduction of deferred revenue ~~and guarantee liabilities~~in 2017 associated with the end of the Technology Upgrade Program ~~lower cash collections from accounts receivable and increased inventory associated with the launch of t:lock, as well as other net changes associated with the timing of payments.~~in place at that time.

Investing activities. Net cash used in investing activities was $84.1 million for the nine months ended September 30, 2018, which was primarily related to purchases of short-term investments of $100.6 million, offset by sales and maturities of $18.5 million of short-term investments. Net cash provided by investing activities was $4.2 million for the nine months ended September 30, 2017, which was primarily related to sales and maturities of $8.5 million of short-term investments, ~~of $8.5 million,~~ partially offset by the purchase of $4.3 million of property and ~~equipment~~. ~~Net cash provided by investing activities was $5.9 million for the~~ ~~nine months ended~~ September 30, 2016, which was primarily related to the purchase of $25.9 million of short-term investments and $6.2 million of property and equipment, offset by proceeds from sales and maturities of short-term investments of $38.0 million.equipment.

Financing activities. Net cash provided by financing activities was ~~$17.7~~$115.2 million for the nine months ended September 30, 2018, which was primarily the result of net proceeds of approximately $172.9 million from the public offerings of our common stock in February 2018 and August 2018, as well as proceeds of $29.5 million from the exercise of Series A and Series B warrants issued in the public offering of common stock in October 2017. The majority of the August 2018 offering proceeds were used to fund the full repayment of our outstanding Term Loan Agreement, which was a cash usage of $87.7 million. Net cash provided by financing activities was $25.7 million for the nine months ended September 30, 2017, which was primarily the result of net proceeds of ~~approximately $25.7~~$25.1 million from ~~the issuance~~public offerings of our common ~~stock, partially offset by an increase in our restricted cash balance of $8.0 million as required by the Fourth Amendment to our Term Loan Agreement~~. Net cash provided by financing activities was $16.6 million for the nine months ended September 30, 2016, which was primarily the result of net proceeds of $15.0 million under the Term Loan Agreement and ~~$1.6 million in proceeds from the issuance of common stock associated with our ESPP, as well as the exercise of outstanding stock options and warrants.~~stock.

Our liquidity position and capital requirements are subject to fluctuation based on a number of ~~factors. In particular, our cash inflows and outflows are principally impacted by~~factors, including the following:

Our primary short-term capital needs, which are subject to change, include expenditures related to:

Although we believe the foregoing items reflect our most likely uses of cash in the short-term, we cannot predict with certainty all of our particular ~~short-term~~ cash uses or the timing or amount of cash used. ~~We expect~~If cash generated from operations is insufficient to satisfy our working capital requirements, we ~~will need to raise additional funding~~may in ~~order to continue as a going concern, meet our minimum liquidity requirements, and execute on our business strategy. We intend~~the future be required to seek additional capital from public or private offerings of our capital stock, ~~(including pursuant to our ATM offering)~~ or we may elect to borrow ~~additional~~ amounts under new ~~debt financing arrangements~~credit lines or from other ~~sources.~~ sources. If we issue equity or ~~convertible~~ debt securities to raise additional ~~funding,~~funds, our existing stockholders may experience dilution, we may incur significant financing or debt service costs, and the new equity or ~~convertible~~ debt securities may have rights, preferences and privileges senior to those of our existing stockholders. If we issue debt securities to raise additional funding, we would incur additional debt service obligations, we could become subject to additional restrictions limiting our ability to operate our business, and we may be required to further encumber our assets. Our ability to continue as a going concern, meet our minimum liquidity requirements, satisfy the covenants under the Term Loan Agreement, and execute our business strategy is dependent on our ability to raise additional capital, of which thereThere can be no ~~assurance. If we cannot generate sufficient revenues from the sale of our products or secure additional~~assurance that financing will be available on acceptable terms, ~~we may be forced to significantly alter our business strategy, substantially curtail~~ or ~~modify our current operations, or cease operations altogether.~~at all.

~~We had $82.3~~In August 2018, we fully repaid our term loan made by CRG pursuand to the Term Loan Agreement. The balance of the outstanding debt at the time of repayment was $82.7 million. The repayment included approximately $1.1 million in accrued interest and ~~$81.1~~$5.0 million ~~of aggregate~~in associated financing fees that became due. Therefore, we did not have any borrowings outstanding under the Term Loan Agreement ~~at September 30, 2017 and December 31, 2016, respectively.~~

~~Under~~ the Term Loan Agreement, interest is payable, at our option, (i) in cash at a rate of 11.5% per annum or (ii) at a rate of 9.5% of the 11.5% per annum in cash and 2.0% of the 11.5% per annum to be added to the principal of the loan and subject to accruing interest. Interest-only payments are due quarterly on March 31, June 30, September 30 and December 31 of each year of the interest-only payment period, which ends on December 31, 2019. The principal balance is due in full on the maturity date of the Term Loan Agreement, which is March 31, 2020. We had elected to pay interest in cash at a rate of 11.5% per annum through September 30, 2015. Beginning October 1, 2015, we elected to pay interest in cash at a rate of 9.5% per annum and to have 2.0% per annum added to the principal of the loan. As a result, $2.3 million was added to the principal of the loan since October 1, 2015, which we refer to as ~~PIK Loans.~~

The loan is collateralized by all of our assets. The principal financial covenants require that we attain minimum annual revenues of $80.0 million in 2017 and $95.0 million each year thereafter until the end of the term of the loan.

In connection with the Third Amendment, we previously agreed to pay, on the earlier of (i) the maturity date of the Term Loan Agreement, which is March 31, 2020, (ii) the date that the loan under the Term Loan Agreement becomes due, and (iii) the date on which we make a voluntary pre-payment of the loan, a financing fee equal to 3.0% of the sum of (x) the aggregate amount drawn under the Third Amendment, and (y) any PIK Loans issued in relation to the Third Amendment, which we refer to as the Back End Financing Fee.

The audit report and opinion of our independent registered public accounting firm contained in the Annual Report includes an explanatory paragraph that describes conditions that raise substantial doubt about our ability to continue as a going concern. This explanatory paragraph constitutes a potential event of default under the Term Loan Agreement. On March 7, 2017, we entered into the Fourth Amendment, which included a limited waiver of the potential event of default. In consideration for the waiver, we agreed to: (i) issue the Capital Royalty Warrant, (ii) increase our restricted cash balance from $2.0 million to $10.0 million, (iii) provide Capital Royalty Partners the same information we make available to our board of directors, subject to limited exceptions, and (iv) not incur additional third party indebtedness secured solely by accounts receivable, inventory and cash. In addition, the Fourth Amendment includes a covenant requiring us to complete financings in which our gross proceeds from the sale of equity securities is at least $30.0 million, no later than January 15, 2018. As a result of the public offering of our common stock in March 2017, the sale of our common stock pursuant to our ATM offering, and the public offering of our common stock and warrants in the October Financing, we have satisfied our obligations pursuant to this equity financing covenant, although we remain subject to additional covenants.

Pursuant to the Fourth Amendment, we have agreed to increase the Back End Financing Fee to 5.0% of the entire aggregate principal amount of borrowings outstanding, including total PIK Loans issued, under the Term Loan Agreement. The Back End Financing Fee is payable at maturity of our loans and on the principal amount of any loans for which we make an optional prepayment, and may be payable in connection with asset sales not permitted under the Term Loan Agreement or in connection with a change of control. As of September 30, ~~2017, we had accrued $4.1~~2018. At the time of repayment, the remaining $5.3 million ~~for~~debt discount balance associated with the ~~Back End Financing Fee.~~ financing fees and certain debt issuance costs was accelerated and recognized as a loss on extinguishment of debt in the third quarter ended September 30, 2018.

Our discussion and analysis of our financial condition and results of operations are based on our financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities in our financial statements. We evaluate our estimates and judgments on an ongoing basis. We base our estimates on historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about our financial condition and results of operations that are not readily apparent from other sources. Actual results may differ from these estimates.

There have been no material changes to our critical accounting policies and estimates from the information provided in Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies Involving Management Estimates and Assumptions,” included in the Annual ~~Report.~~Report other than adoption of the new revenue recognition standard (“Revenue from Contracts with Customers Standard”). Refer to the disclosures in the Notes to Unaudited Condensed Consolidated Financial Statements.

As of September 30, ~~2017,~~2018, we did not have any off-balance sheet arrangements.

We invest our excess cash primarily in commercial paper, government-sponsored enterprise securities and U.S. government treasury securities. Some of the financial instruments in which we invest have market risk associated with them, in that a change in prevailing interest rates may cause the principal amount of the instrument to fluctuate. Other financial instruments in which we invest potentially subject us to credit risk, in that the value of the instrument may fluctuate based on the issuer’s ability to pay.

The primary objectives of our investment activities are to maintain liquidity and preserve principal while maximizing the income we receive from our financial instruments without significantly increasing risk. We have established guidelines regarding approved investments and maturities of investments, which are primarily designed to maintain liquidity and preserve principal.

Because of the short-term maturities of our financial instruments, we do not believe that an increase or decrease in market interest rates would have any significant impact on the realized value of our investment portfolio. If a 10% change in interest rates were to have occurred on September 30, ~~2017~~2018, this change would not have had a material effect on the fair value of our investment portfolio as of that date.

The interest rate under the Term Loan Agreement iswas fixed and not subject to changes in market interest rates.The outstanding balance associated with the Term Loan Agreement was fully repaid in August 2018.

Our operations are located in the United States, and nearly all of our sales since inception have been made in U.S. dollars. While we began commercialization of t:slim X2 in select geographies outside the U.S. in the third quarter of 2018, we expect the significant majority of our sales will continue to be made in U.S. dollars for the foreseeable future. Accordingly, we do not currently have or expect to have any material exposure to foreign currency rate fluctuations. From time to time, we may have foreign currency exchange risk associated with currency exposure related to existing assets and liabilities, committed transactions and forecasted future cash flows. In certain circumstances, we may seek to manage such foreign exchange risk by using derivative instruments such as foreign exchange forward contracts to hedge our risks. In general, we may hedge material foreign exchange exposures up to 12 months in advance. However, we may choose not to hedge some exposures for a variety of reasons including prohibitive economic costs.

We maintain disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities and Exchange Act of 1934, as amended, ~~(the “Exchange Act”)~~or the Exchange Act, that are designed to ensure that information required to be disclosed in our periodic and current reports that we file with the Securities and Exchange Commission, or the SEC, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable and not absolute assurance of achieving the desired control objectives. In reaching a reasonable level of assurance, management necessarily is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. In addition, the design of any system of controls is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Control systems can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

As of September 30, ~~2017,~~2018, we carried out an evaluation under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures. Based on this evaluation, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of September 30, ~~2017.~~2018.

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) during the quarter ended September 30, ~~2017~~2018 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

From time to time, we are involved in various legal proceedings, disputes and other claims arising in the ordinary course of our ~~business.~~business, including actions with respect to intellectual property, employment, product liability and contractual matters. Although the results of legal proceedings and claims cannot be predicted with certainty, we currently believe that the final outcome of these ordinary course matters will not, individually or in the aggregate, have a material adverse effect on our business, financial position, results of operations, cash flows or ~~cash flows.~~future prospects. However, regardless of the outcome, legal proceedings and claims can have an adverse impact on us because of legal costs, diversion of management time and resources, and other factors.

The following sets forth certain risk factors associated with our business. The risk factors set forth below marked with an asterisk (*) next to the title contain changes to the description of the risk factors associated with our business previously disclosed in Part I, Item 1A of the Annual Report.

An investment in our common stock involves risks. You should consider carefully the risks described below, together with all of the other information included in this Quarterly Report, as well as in our other filings with the SEC, in evaluating our business. If any of the following risks actually occur, our business, financial condition, operating results and future prospects could be materially and adversely affected. In that case, the trading price of our common stock may decline and you might lose all or part of your investment. The risks described below are not the only ones we face. Additional risks that we currently do not know about or that we currently believe to be immaterial may also impair our business, financial condition, operating results and prospects. Certain statements below are forward-looking statements.

The risk factors set forth below marked with an asterisk (*) next to the title contain changes to the description of the risk factors previously disclosed in Part II, Item 1A of the Quarterly Report for the period ended June 30, 2018.

We have incurred significant operating losses since inception and cannot assure you that we will achieve profitability.*

Since our inception in January 2006, we have incurred a significant net loss. As of September 30, ~~2017,~~2018, we had an accumulated deficit of ~~$466.2~~$603.8 million. To date, we have financed our operations primarily through public and private sales of our equity securities, debt financing, ~~with Capital Royalty Partners II, L.P.~~ and ~~its affiliated funds, or Capital Royalty Partners, and~~cash collected from sales of our products. We have devoted substantially all of our resources to the development and commercialization of our products, the scaling of our manufacturing operations and commercial organization, the research and development of our current products and products under development, and the assembly of a management team to manage our business.

We began commercial sales of our first commercial product, the t:slim Insulin Delivery System, or t:slim, in the third quarter of 2012. ~~We began commercial sales of t:flex in the second quarter of 2015 and t:slim G4 in the third quarter of 2015.~~ In October 2016, we ~~discontinued new shipments of t:slim and~~ launched t:slim X2, our next-generation flagship ~~pump. In~~pump, and in August 2017, we commenced commercial sales of t:slim X2 with Dexcom G5 Mobile CGM integration. The t:slim X2 hardware platform now represents nearly 100% of new pump shipments. In June 2018, we received FDA approval to sell our new t:slim X2 with Basal-IQ technology, which is integrated with Dexcom G6 CGM, and commenced sales and shipments of the t:slim X2 with Basal-IQ technology in the United States during the third quarter of 2018. In addition, we commenced sales and shipments of our t:slim X2 with G5 integration ~~and discontinued new sales~~in select markets outside the United States during the third quarter of ~~t:slim G4.~~ 2018.

Since the first quarter of 2013, we have been able to manufacture and sell our insulin pump products at a cost and in volumes sufficient to allow us to achieve a positive overall gross margin. For the years ended December 31, ~~2016~~2017 and ~~2015,~~2016, our gross profit was ~~$23.6~~$44.1 million and ~~$26.6~~$23.6 million, respectively. Although we have achieved a positive overall gross margin, we still operate at a significant net loss and expect that we will continue to do so for at least the next ~~several~~two years.

To implement our business strategy and achieve profitability, we need to, among other things, increase sales ~~and gross profits~~ of our products and the gross profit associated with those sales, maintain an appropriate customer service and support infrastructure, fund ongoing research and development activities, ~~improve and expand~~create additional efficiencies in our manufacturing ~~capabilities,~~processes, and obtain regulatory clearance or approval to commercialize our products currently under ~~development.~~development both domestically and internationally. Our expenses may continue to increase as we pursue these objectives and make investments in our business. Additional increases in our expenses without commensurate increases in sales could significantly increase our operating losses.

The extent of our future operating losses and the timing of our profitability are highly uncertain in light of a number of factors, including the timing of the launch of new products and product features by us and our competitors, market acceptance of our products and competitive products by people with insulin-dependent diabetes, their caregivers and healthcare providers, and the timing of regulatory approval of ~~new products.~~our products and the products of our competitors. Any additional operating losses will have an adverse effect on our stockholders’ equity, and we cannot assure you that we will ever be able to achieve or sustain profitability.

We currently rely on sales of insulin ~~pumps~~pump products to generate a significant portion of our revenue, and any factors that negatively impact sales of ~~our insulin pump~~these products may adversely affect our business, financial condition and operating results.*

We generate ~~a significant majority~~nearly all of our revenue from the sale of ~~our insulin pump products. During 2017, our insulin pump products have included our~~ t:slim X2 ~~t:flex~~insulin pumps and ~~t:slim G4 products. In August 2017, we received FDA approval for t:slim X2 with G5,~~the related insulin cartridges and ~~discontinued sales of t:slim G4 in connection with our launch of t:slim X2 with G5 during the three months ended September 30, 2017.~~infusion sets. Sales of ~~our insulin pumps~~these products may be negatively impacted by many factors, including:

In addition, sales of any of our current or future insulin pump products with CGM integration are subject to the continuation of our applicable agreements with Dexcom, which under some circumstances are subject to termination by Dexcom, with or without cause, on relatively short notice. Sales of our products may also be negatively impacted in the event of any regulatory or legal actions relating to Dexcom’s CGM products, or in the event of any disruption to the availability of the applicable CGM related supplies, such as sensors or transmitters, in a given market in which our products are sold.

Furthermore, sales of our products may be adversely impacted by negative perceptions regarding our financial stability relative to that of our competitors, and our ability to sustain our business operations on a long-term basis. These perceptions may cause people with insulin-dependent diabetes, their caregivers and healthcare providers, as well as independent distributors and third-party payors, to question our ability to continue to sell our products, provide customer service, support our commercial organization, and fulfill our strategic objectives. These concerns may arise from a number of factors, including our recent and projected financial results, ~~recent~~ changes in and volatility of our stock price, ~~concerns regarding our ability to maintain the continued listing of our common stock on the NASDAQ Global Market, or NASDAQ,~~ perceptions about the ~~recent completion of a public offering~~dilutive impact of our ~~common stock and warrants, our~~financing transactions, the current level of our indebtedness and debt service costs, ~~our conclusion that there is substantial doubt about our ability to continue as a going concern,~~ the competitive environment in our industry, ~~and accounting complexities brought about by our Technology Upgrade Program,~~ and uncertainties regarding the regulatory environment. Any such concerns, whether actual or perceived, could cause consumers to delay the purchase of our products or to purchase competitive products.

Because we currently rely on sales of our t:slim X2 insulin pump and related products to generate a significant majority of our revenue, any factors that negatively impact sales of these products, or result in sales of these products increasing at a lower rate than expected, could adversely affect our business, financial condition and operating results.

Our ability to maintain and grow our revenue depends in part on retaining a high percentage of our customer base.

A key to maintaining and growing our revenue is the retention of a high percentage of our customers due to the potentially significant revenue generated from ongoing purchases of disposable insulin cartridges and other supplies. In addition, our pumps are designed and tested to remain effective for at least four years and a satisfied customer may consider purchasing another product from us when the time comes to replace the pump. We have developed retention programs aimed at our customers, their caregivers and healthcare providers, which include training specific to our products, ongoing support by sales and clinical employees, and 24/7 technical support and customer service. Demand for our products from our existing customers could decline, or could fail to increase in line with our projections, as a result of a number of factors, including the introduction of competitive products, breakthroughs for the monitoring, treatment or prevention of diabetes, changes in reimbursement rates or policies, manufacturing problems, perceived safety or reliability issues with our products or the products of our competitors, the failure to secure regulatory clearance or approvals in a timely manner or at all, or for other reasons. In addition, the retention of our customers may be impacted by negative perceptions regarding our financial stability relative to that of our competitors, and our ability to sustain our business operations on a long-term basis. The failure to retain a high percentage of our customers and increase sales to these customers consistent with our forecasts would have a material adverse effect on our business, financial condition and operating results.

We operate in a very competitive industry and if we fail to compete successfully against our existing or potential competitors, many of whom have greater resources than us, our sales and operating results may be negatively affected.*

The medical device industry is intensely competitive, subject to rapid change and highly sensitive to the introduction of new products, treatment techniques or technologies, oras well as other activities of industry participants. We believe our products compete, and will continue to compete, directly with a number of traditional insulin pumps as well as other methods for the treatment of diabetes, including multiple daily injection, or MDI, therapy.

Our primary competitors are major medical device companies that are either publicly traded companies or divisions or subsidiaries of publicly traded companies. For instance, Medtronic MiniMed, a division of Medtronic ~~Inc.,~~plc, has been the market leader for many years and has the majority share of the traditional insulin pump market in the United States. However, the market for insulin pumps continues to experience significant changes. For instance, in ~~2016, Roche Diabetes Care, a division of F. Hoffman-La Roche, discontinued sales of new insulin pumps in the United States. On~~ October 5, 2017, Johnson & Johnson announced ~~that it is planning~~its plans to discontinue the operations of Animas ~~Corporation~~ and to exit the insulin pump business entirely. ~~Both Roche and~~ Animas designated Medtronic as a preferred partner to facilitate the transition of their respective insulin pump customers. In addition, in late 2017, Eli Lilly & Co. announced that it is developing an insulin pump with AID technology that it intends to launch in the next two to three years. There are also a number of other companies developing and marketing their own insulin delivery systems and/or related software applications, including insulin pumps and Bluetooth-enabled insulin pens to support MDI therapy. While these industry changes are significant, it is ~~too early~~difficult to know how itthey will ~~influence~~impact our business or the competitive landscape in which we operate.

Our key competitors, most notably Medtronic, enjoy several competitive advantages over us, including:

In some instances, our competitors offer products that include features that we do not currently offer. For instance, Medtronic offers a traditional insulin pump ~~that is integrated~~ with a ~~CGM system with a threshold suspend feature. In addition, Medtronic recently commenced the commercialization of a new insulin pump product with additional automated insulin delivery~~hybrid closed-loop AID functionality and a new CGM ~~system. Similarly,~~system and Insulet offers an insulin pump with a tubeless delivery system that does not utilize an infusion set. These specific features may make the competitive products more desirable to customers and healthcare providers, which could negatively impact sales of our products.

In addition, the competitive environment in which we operate has resulted and may continue to result in competitive pressures on our manufacturers, suppliers, distributors, collaboration partners and other business constituents. For example, we have entered into development agreements with Dexcom, which provide us non-exclusive licenses to integrate various generations of Dexcom CGM technology with our insulin pump products. In the fourth quarter of 2017, Abbott Laboratories ~~recently announced FDA approval of~~launched a new blood glucose monitoring system in the United States which ~~is expected to compete~~competes with the Dexcom ~~technology.~~technology, and another CGM product with CE mark approval was approved in the second quarter of 2018 for sale in the United States. Competitive pressures within our industry ~~have impacted and may continue to impact our business partners, which~~ could negatively impact the financial condition of our ~~relationship with these~~business partners, impact their ability to ~~fulfil their~~fulfill contractual obligations to us, and result in harm to our financial condition and operating results.

For these and other reasons, we may not be able to compete successfully against our current or potential future competitors. As a result, our product sales may be negatively affected, which could have ana material adverse impact on our financial condition and operating results.

Competitive products or other technological developments and breakthroughs for the monitoring, treatment or prevention of diabetes may render our products obsolete or less ~~desirable.~~desirable, or cause consumers to delay the purchase of our products.*

Our ability to achieve our strategic objectives will depend, among other things, on our ability to develop and commercialize products for the treatment of diabetes that offer distinct features and functionality, are easy-to-use, receive adequate coverage and reimbursement from third-party payors, and are otherwise more appealing than available alternatives. Our primary competitors, as well as a number of other companies and medical researchers ~~and pharmaceutical companies~~ are pursuing new delivery devices, delivery technologies, sensing technologies, treatment techniques, procedures, drugs and other therapies for the monitoring, treatment and prevention of diabetes. Any ~~technological~~ breakthroughs in diabetes monitoring, treatment or prevention could reduce the potential market for our products or render our products obsolete altogether, which would significantly reduce our sales or cause our sales to grow at a slower rate than we currently expect. In addition, even the perception that new products may be introduced, or that technological or treatment advancements could occur, could cause consumers to delay the purchase of our products.

Because the insulin-dependent diabetes market is large and growing, we anticipate ~~that~~ companies will continue to dedicate significant resources to developing competitive ~~products.~~products and technologies. The ~~frequent~~ introduction by competitors of products that are or claim to be superior to our products may create market confusion that may make it difficult to differentiate the benefits of our products over competitive products. In addition, some of our competitors employ aggressive pricing strategies, including the use of discounts, rebates, low cost product upgrades or other financial incentives that could adversely affect sales of our products. If a competitor develops a product that competes with or is perceived to be superior to our products, or if competitors continue to utilize strategies that place downward pressure on pricing within our industry, our sales may decline, our operating margins could be reduced and we may fail to meet our financial projections, which would materially and adversely affect our business, financial condition and operating results.

Moreover, we have designed our products to resemble modern consumer electronic devices to address certain embarrassment and functionality concerns consumers have raised with respect to traditional pumps. The consumer electronics industry is itself highly competitive, and characterized by continuous new product introductions, rapid developments in technology, and subjective and changing consumer preferences. If, in the future, consumers cease to view our products as contemporary or convenient as compared to then-existing consumer electronics technology, our products may become less desirable.

The Technology Upgrade Program has resulted in accounting complexities that may be difficult for investors to understand and may lead to confusion when comparing our historical and future financial results.

The Technology Upgrade Program has resulted in a number of accounting complexities that will make comparisons of our historical and future financial results more difficult. In particular, United States generally accepted accounting principles, or GAAP, prevent us from recognizing, at the time of sale, up to 100% of the sales and cost of sales associated with the sale of t:slim and t:slim G4 made to eligible customers during the term of the Technology Upgrade Program. Instead, depending on the type of pump sold, we are required to defer some or all of the sales and cost of sales until a later date, which will generally be the earlier of when our obligations under the Technology Upgrade Program are satisfied or when the program expires. The amount and timing of the deferred sales and cost of sales will depend on multiple factors that are based on future events that are difficult to estimate or predict, especially because we have not offered a similar trade-in program in the past. For example, we do not currently have sufficient history to reasonably estimate the ~~likelihood that the trade-in rights will be exercised, or the timing of any trade-in decisions~~. Accordingly, it is very difficult for us to estimate the amount of the deferrals with any level of certainty, which makes it very difficult for us to predict our GAAP results, including revenues and operating margins.

Despite our efforts to explain the required accounting treatment for the Technology Upgrade Program, it is possible that investors or analysts will view the accounting treatment or the resulting impact on our GAAP financial results negatively, and there may be confusion when comparing our historical and future financial results, which may cause our stock price to decline. In addition, the complexities associated with the accounting treatment, or with the Technology Upgrade Program generally, may cause investors to avoid purchasing our common stock until the impact of the program is better understood or our financial results and trends are more predictable, which also may adversely impact our stock price.

Our ability to achieve profitability will depend, in part, on our ability to reduce the per unit cost of our products by increasing production volume and manufacturing efficiency, including by reducing raw material, labor, product-training, expected warranty and manufacturing overhead costs per unit.*

~~We believe that our ability to reduce the per-unit cost~~failure of our insulin pump ~~products~~ and related ~~cartridges will have a significant impact on our ability to achieve profitability.~~ ~~Our cost of sales includes~~ raw material procurement costs, labor costs, product-training expenses and expected warranty expenses. It also includes manufacturing overhead costs, including expenses relating to quality assurance, inventory control, facilities, equipment, information technology, and operations management. If we are unable to sustain or reduce our overall cost of sales, including through arrangements such as volume purchase discounts, negotiation of improved pricing, more efficient training programs for customers, and improved warranty performance, it will be difficult to reduce our per unit costs and our ability to achieve profitability will be constrained. The per unit cost of our products is significantly impacted by our overall production volumes, and any factors that cause our production volumes to decline, or to grow at a slower rate than we expect, would significantly impact our expected per unit costs. In addition, we may experience disruption in our manufacturing productivity or incur duplicative or incremental costs as we manage the planned relocation of our manufacturing facility over the next several months. Furthermore, while we currently believe our proprietary technology platform will allow us to gain efficiencies in the design and development of new products, changes in the market that require us to modify or replace our existing platform will reduce the amount of efficiency gained through our platform and increase our per unit costs. If we are unable to effectively manage our overall costs, while increasing our production volumes, we may not be able to achieve or sustain profitability, which would have an adverse impact on our business, financial condition and operating results.

~~The failure of our~~ products to achieve and maintain market acceptance could result in us achieving sales below our expectations, which would cause our business, financial condition and operating results to be materially and adversely affected.*

Our current business strategy is highly dependent on our insulin pump and related products achieving and maintaining market acceptance. ~~Our products include t:slim X2 with G5 integration and t:flex.~~ In order for us to sell our products to people with insulin-dependent diabetes, we must convince them, their caregivers and healthcare providers that our products are an attractive alternative to competitive products for the treatment of diabetes, including traditional insulin pump products and MDI therapies, as well as alternative ~~insulin~~diabetes monitoring, treatment or prevention methodologies. Market acceptance and adoption of our products depends on educating people with diabetes, as well as their caregivers and healthcare providers, about the distinct features, ease-of-use, positive lifestyle impact, and other perceived benefits of our products as compared to competitive products. If we are not successful in convincing existing and potential customers of the benefits of our products, or if we are not able to achieve the support of caregivers and healthcare providers for our ~~insulin pump~~ products, our sales may decline or we may ~~fail to increase~~achieve sales below our ~~sales in line with our forecasts.~~expectations.

~~Achieving and maintaining market~~Market acceptance of our products could be negatively impacted by many factors, including:

In addition, even if we are able to convince people with insulin-dependent diabetes, their caregivers or healthcare providers that our products compare favorably to the products and treatment alternatives offered by our competitors, negative perceptions regarding our financial stability relative to that of our competitors, and our ability to sustain our business operations on a long-term basis, especially in light of our recent and projected financial results, recent changes in and volatility of our stock price, concerns regarding our ability to maintain the continued listing of our common stock on NASDAQ, perceptions about the recent completion of a public offering of our common stock and warrants, our current level of indebtedness and debt service costs, our conclusion that there is substantial doubt about our ability to continue as a going concern, and uncertainties regarding the regulatory environment, could cause consumers to delay the purchase of our products or to purchase competitive products.

Furthermore, the rapid evolution of technology and treatment options within our industry may cause consumers to delay the purchase of our products in anticipation of advancements or breakthroughs, or the perception that advancements or breakthroughs could occur, in our products or the products offered by our competitors. For example, we believe that during the second half of 2016, consumers interested in purchasing our insulin pump products may have delayed or changed their purchasing decisions in anticipation of the release of a new product by one of our competitors. It is also possible that consumers interested in purchasing any of our future products currently under development may delay the purchase of one of our current products.

If our insulin pump products do not achieve and maintain widespread market acceptance, we may fail to achieve sales ~~at or above~~consistent with our ~~projected amounts. If our sales do not meet our sales~~ projections, in which case our business, financial condition and operating results could be materially and adversely ~~affected,~~affected.

We believe our ability to reduce the per unit cost of our insulin pump products and related products will have a significant impact on our ability to achieve profitability. Our cost of sales includes raw material procurement costs, labor costs, product training expenses, warranty, scrap and inventory excess and obsolescence. It also includes manufacturing overhead costs, including expenses relating to quality assurance, inventory control, facilities, equipment, information technology and operations management. If we are unable to sustain or reduce our overall cost of sales, including through arrangements such as volume purchase discounts, negotiation of improved pricing, more efficient training programs for customers, and improved warranty performance, it will be difficult to reduce our per unit costs and our ability to achieve profitability will be constrained.

In addition, the per unit cost of our products is significantly impacted by our overall production volumes, and any factors that prevent our products from achieving market acceptance, cause our production volumes to decline, or result in our sales growing at a slower rate than we expect, would significantly impact our expected per unit costs, which would adversely impact our gross margins. In addition, we may ~~fail~~not achieve anticipated improvements in manufacturing productivity following the relocation of our manufacturing operations to ~~meet~~ our ~~strategic objectives.~~Barnes Canyon facility. Furthermore, while we currently believe our proprietary technology platform will allow us to efficiently design and develop new products, changes in the market that require us to modify or replace our existing platform will reduce the efficiencies gained through our platform and could increase our per unit costs or prevent those costs from declining. If we are unable to effectively manage our overall costs while increasing our production volumes and lowering our per unit costs, we may not be able to achieve or sustain profitability, which would have an adverse impact on our business, financial condition and operating results.

Failure to secure or retain adequate coverage or reimbursement for our current products and our potential future products by third-party payors could adversely affect our business, financial condition and operating results.*

We have derived nearly all of our revenue from sales of insulin pumps, and ~~associated supplies~~related insulin cartridges and infusion sets, and expect to continue to do ~~so.~~so in the foreseeable future. A substantial portion of the purchase price of an insulin pump is typically paid for by third-party payors, including private insurance companies, preferred provider organizations and other managed care providers. Future sales of our current and future products will be limited unless our customers can rely on third-party payors to pay for all or part of the associated purchase cost. Access to adequate coverage and reimbursement for our current and future products by third-party payors, both domestically and internationally, is essential to the acceptance of our products by customers.

As guidelines in setting their coverage and reimbursement policies, many third-party payors in the United States use coverage decisions and payment amounts determined by the Centers for Medicare and Medicaid Services, or CMS, which administers the U.S. Medicare program. Medicare periodically reviews its reimbursement practices for diabetes-related products. Medicare previously implemented a competitive bidding process for blood glucose strip reimbursement, which resulted in a significant reduction in the reimbursement rate for those products. ~~More recently, in~~In 2017, Medicare announced, and then shortly thereafter suspended, a competitive bidding process for insulin pumps. As a result, there is uncertainty as to the future Medicare reimbursement rate for our products. It is also possible that CMS may review and modify the current coverage and reimbursement of diabetes-related products in connection with anticipated changes to the regulatory approval process for insulin pumps and related products, software applications and services. In addition, ~~those~~ third-party payors that do not follow the CMS guidelines may adopt different coverage and reimbursement policies for our current and future products. It is possible that some third-party payors will not offer any coverage for our current or future products. For instance, effective July 1, 2016, UnitedHealthcare designated one of our competitors as their preferred, in-network durable medical equipment provider of insulin pumps for most customers over the age of 18. We expect this decision will prevent a majority of UnitedHealthcare members from purchasing an insulin pump from us for the foreseeable future. It is possible that other third-party payors may adopt similar policies in the future, which would adversely impact our ability to sell our products.

WeWe currently have contracts establishing reimbursement for our insulin pump products with approximately ~~150~~176 national and regional third-party payors in the United States. While we ~~anticipate entering~~may enter into additional contracts both domestically and internationally, with third-party payors and adding coverage for future products under our current agreements,, we cannot guarantee that we will succeed in doing so or that the reimbursement contracts that we are able to negotiate will enable us to sell our products on a profitable basis. In particular, we do not have experience securing reimbursement in international markets. Also, any negative perceptions among third-party payors regarding our financial stability, ~~and~~including our ability to continue to sell and service our products, may make it more difficult to enter into or renew reimbursement contracts ~~for reimbursement~~ with ~~additional~~ third-party payors. This may be especially true in light of the fact that our management believes that we do not have sufficient cash to fund our operations for the next twelve months without additional financing, and the conclusion that there is substantial doubt about our ability to continue as a going concern. In addition, existing contracts with third-party payors generally can be modified or terminated by the third-party payor without cause and with little or no notice to us. Moreover, compliance with the administrative procedures or requirements of third-party payors may result in delays in processing approvals by those third-party payors for customers to obtain coverage for our products. Failure to secure or retain adequate coverage or reimbursement for our current and future products by third-party payors, or delays in processing approvals by those payors, could result in the loss of sales, which could have a material adverse effect on our business, financial condition and operating results.

Further, the healthcare industry in the United States is increasingly focused on cost containment as government and private insurers seek to control healthcare costs by imposing lower payment rates and negotiating reduced contract rates with third-party payors. If third-party payors deny coverage or reduce their current levels of payment, or if our production costs increase faster than increases in reimbursement levels, we may be unable to sell our products on a profitable basis.

We may face unexpected challenges in marketing and selling our products, and training new customers on the use of our products, which could harm our ability to achieve our sales ~~and service objectives.~~forecasts.*

We have ~~only~~ limited experience marketing and selling our products as well as training new customers on their ~~use.~~use, particularly in international markets. In addition, the vast majority of our existing customers are individuals with type 1 diabetes, and we have ~~only~~ limited experience marketing and selling our products to customers with type 2 diabetes. ~~As a result, we may face unexpected challenges marketing and~~We anticipate that selling ~~t:flex, which is designed~~our products to ~~meet the needs of~~customers with higher insulin requirements, including customers with type 2 diabetes, ~~and/or higher insulin requirements.~~may be even more difficult following our decision to discontinue sales of new t:flex pumps in the third quarter of 2018.

We expect to derive nearly all of our revenue from the sale of our t:slim X2 ~~with G5, t:flex Pumps~~ insulin pump, and ~~pump-related supplies~~the related insulin cartridges and infusion sets, unless and until we receive regulatory clearance or approval for other products currently under development. As a result, our financial condition and operating results are and will continue to be highly dependent on ~~the~~our ability ~~of our sales and marketing organization~~ to adequately promote, market and sell our t:slim X2 insulin ~~pumps~~pump and related products, and the ability of our diabetes educators to train new customers on the use of our products. If our sales and marketing representatives or diabetes educators fail to achieve their objectives, our sales could decrease or may not increase at levels that are in line with our forecasts.

If we are unable to maintain our existing sales, marketing, clinical and customer service infrastructure, we may fail to increase our sales to meet our forecasts.*

A key element of our business strategy ~~is the ability of~~involves our sales, clinical, marketing and customer service ~~infrastructure to drive~~personnel driving adoption ~~of our products, which includes independent diabetes educators that train new customers on the use~~ of our products. We have rapidly increased the number of sales, marketing, clinical and customer service personnel employed by us since the initial commercial launch of t:slim in 2012. However, we have faced considerable challenges in growing and managing these resources, including with respect to recruiting, training and assimilation of new territories and accounts. We expect to continue to face significant challenges as we manage and grow our infrastructure in the future and work to motivate and retain the individuals who make up our existing infrastructure. These challenges may be even greater in ~~light of negative perceptions regarding~~connection with our ~~financial stability, and~~commercial expansion outside the ~~recent decline in our stock price, which may make it more difficult to motivate and retain key personnel.~~United States. Unexpected turnover among our sales, marketing, clinical and customer service personnel would have a negative impact on our ability to achieve our sales projections. Further, if a sales, marketing or clinical representative was to depart and be retained by one of our competitors, we may fail to prevent him or her from helping competitors solicit business from our existing customers, which couldadversely affect our sales. Similarly, if we are not able to recruit and retain a network of diabetes educators and customer service personnel, we may not be able to successfully train and service new customers, which could delay new sales and harm our reputation.

We expect ~~that~~ the management of our sales, marketing, clinical and customer service personnel will continue to place significant burdens on our management team. If we are unable to retain our personnel in line with our strategic plans, we may not be able to effectively commercialize our existing products or products under development, or enhance the strength of our brand, either of which could result in the failure of our sales to increase in line with our projections or ~~could even~~ cause sales to decline.

Our sales and marketing efforts are dependent on independent distributors who are free to market products that compete with our products. If we are unable to maintain or expand our network of independent distributors, our sales may be negatively affected.*

For the year ended December 31, ~~2016,~~2017, sales to approximately 4035 independent distributors represented approximately ~~74%~~75% of our sales. While our goal in the United States is to ~~ultimately~~ reduce the percentage of our sales to independent distributors over time as we enter into contracts with additional third-party payors, we believe ~~that~~ a ~~meaningful percentage~~majority of our sales will continue to be to independent distributors for the foreseeable future, and it is possible that the percentage of our sales to independent distributors could even increase in the near ~~term.~~term, particularly in light of our plans to primarily rely on independent distributors outside of the United States. For example, our dependence upon independent distributors could increase if third-party payors decide to contract ~~with~~wit h independent distributors directly in lieu of contracting with us to supply our products to their members directly. Our dependence upon independent distributors ishas also ~~expected to increase~~increased following our launch of the t:lock ~~Connector~~ for our insulin cartridge, which ~~we expect will~~may continue to result in greater sales of our infusion sets to distributors. Our dependence upon independent distributors could also increase if customers prefer to purchase all of their diabetes supplies through a single source, instead of purchasing pump-related products through us and other diabetes supplies through other suppliers. However, negative perceptions among independent distributors regarding our ~~conclusion that, unless we successfully raise additional capital, there is substantial doubt about~~financial stability, and our ability to ~~continue as~~sustain our business operations on a going concern, together with the inclusion of an explanatory paragraph that describes conditions that raise substantial doubt about our ability to continue as a going concern in our independent registered public accounting firm’s report contained in our financial statements for the year ended December 31, 2016,long-term basis, may negatively impact ~~one or more~~the willingness of our ~~distributors’ interest in continuing~~distributors to continue to do business with us. None of our independent distributors in the United States has been required to sell our products exclusively and each of them may freely sell the products of our competitors. Our distributor agreements in the United States generally have one-year initial terms with automatic one-year renewal terms, and are terminable in connection with a party’s material breach. Our distributor agreements outside the United States generally have longer initial terms and, in addition to being terminable in connection with a party’s material breach, include provisions that allow us to terminate those agreements prior to their ordinary expiration. If we are unable to maintain or expand our network of independent distributors, our sales may be negatively affected.

For the year ended December 31, ~~2016,~~2017, our two largest independent distributors collectively comprised approximately ~~33%~~35.5% of our sales. If any of our key independent distributors were to cease to distribute our products or reduce their promotion of our products as compared to the products of our competitors, our sales could be adversely affected. In ~~such a situation,~~that case, we may need to seek alternative independent distributors or increase our reliance on our other independent distributors or our direct sales representatives, which may not prevent our sales from being adversely affected. Additionally, to the extent ~~that~~ we enter into additional arrangements with independent distributors to perform sales, marketing or distribution services, or other arrangements pursuant to which independent distributors may purchase product from us, the terms of the arrangements could ~~cause~~result in our product margins to be lower than if we directly marketed and sold our products.

We also intend to market our products internationally primarily through independent distributors and expect we will be similarly dependent on these distributors when we commence international sales.

If the third parties on which we increasingly rely to assist us with our current and anticipated pre-clinical development or clinical trials do not perform as expected, we may not be able to obtain regulatory clearance or approval or commercialize our products.*

As our clinical infrastructure expands, we expect to increasingly rely on third parties, such as contract research organizations, medical institutions, clinical investigators and contract laboratories to conduct some of our current and anticipated pre-clinical investigations and clinical trials. If we are not able to ~~contract with or~~ reach ~~other~~ mutually acceptable agreements with these third parties on a timely basis, ~~or on mutually acceptable terms,~~ or these third parties do not successfully carry out their commitments or regulatory obligations or meet expected deadlines, or the quality or accuracy of the data they obtain is compromised due to the failure to adhere to agreed upon clinical protocols or regulatory requirements or for other reasons, our pre-clinical development activities or clinical trials may be extended, delayed, suspended or terminated, and we may not be able to obtain regulatory clearance or approval for, or successfully commercialize, our products on a timely basis, if at all, and our business, operating results and prospects may be adversely affected. In particular, we currently expect to rely on data from the U.S. portion of the Clinical Acceptance of the Artificial Pancreas (DCLP3) portion of the IDCL Trial, to support our development of t:slim X2 with ~~TypeZero inControl AID algorithms.~~Control IQ. The IDCL Trial is being conducted entirely by third parties over which we have little or no control or influence. In the event that the IDCL Trial is not performed on a timely basis, or if the quality or accuracy of the data obtained from the IDCL Trial is compromised due to the failure to adhere to clinical protocols or regulatory requirements or for other reasons, our development activities for t:slim X2 with ~~TypeZero~~Control IQ may be negatively impacted.

We are increasingly dependent on clinical investigators and clinical sites to enroll patients in our current and anticipated clinical trials, and the failure to successfully complete the clinical trials could prevent us from obtaining regulatory approvals for or commercializing our products.

As part of our product development efforts, we expect to increasingly rely on clinical investigators and clinical sites to enroll patients in our clinical trials and other third parties to manage such trials and to perform related data collection and analysis. However, we may not be able to control the amount and timing of resources that clinical sites may devote to our clinical trials, especially with respect to the IDCL Trial that we intend to rely upon for the development of t:slim X2 with ~~TypeZero.~~Control IQ. If these clinical investigators and clinical sites fail to enroll a sufficient number of patients, fail to ensure compliance by patients with clinical protocols, or fail to comply with regulatory requirements, we may be unable to successfully complete our clinical trials, which could prevent us from obtaining regulatory approvals for our products and commercializing our products, which would have an adverse impact on our business.

~~Our ability to maintain and grow our revenue depends in part on retaining a high percentage of our customer base.~~

A key to maintaining and growing our revenue is the retention of a high percentage of our customers due to the potentially significant revenue generated from ongoing purchases of disposable insulin cartridges and other supplies. In addition, our pumps are designed and tested to remain effective for at least four years and a satisfied customer may consider purchasing another product from us when the time comes to replace the pump. We have developed retention programs aimed at customers, their caregivers and healthcare providers, which include training specific to our products, ongoing support by sales and clinical employees, and 24/7 technical support and customer service. If demand for our products fluctuates, including as a result of the introduction of competitive products, changes in reimbursement policies, manufacturing problems, perceived safety or reliability issues with our or our competitors’ products, the failure to secure regulatory clearance or approvals, or for other reasons, our ability to attract and retain customers could be harmed. In addition, the retention of current customers may be impacted by negative perceptions regarding our financial stability relative to that of our competitors, and our ability to sustain our business operations on a long-term basis. The failure to retain a high percentage of our customers would negatively impact our revenue growth and may have a material adverse effect on our business, financial condition and operating results.

If important assumptions about the potential market for our products are inaccurate, or if we have failed to understand what people with insulin-dependent diabetes are seeking in an insulin pump, our business and operating results may be adversely affected.

Our business strategy was developed based on a number of important assumptions about the diabetes industry in general, and the insulin-dependent diabetes market in particular, any one or more of which may prove to be inaccurate or may change over time. For example, we believe that the benefits of insulin pump therapy as compared to other common insulin treatment alternatives will continue to drive growth in the market for insulin pump therapy. In addition, we believe the incidence of diabetes in the United States and worldwide is increasing. However, each of these assumptions may prove to be inaccurate and limited sources exist to compare treatment alternatives and obtain reliable market data. The actual incidence of diabetes, and the actual demand for our products or competitive products, could differ materially from our projections if our assumptions are incorrect. In addition, our strategy of focusing exclusively on the insulin-dependent diabetes market may limit our ability to increase sales or achieve profitability.

Another key element of our business strategy is utilizing market research to understand what people with diabetes are seeking to improve their diabetes therapy management. This strategy underlies our entire product design, marketing and customer support approach and is the basis on which we developed our current products and are pursuing the development of new products. However, our market research is based on interviews, focus groups and online surveys involving people with insulin-dependent diabetes, their caregivers and healthcare providers that represent only a small percentage of the overall insulin-dependent diabetes market. As a result, the responses we received may not be reflective of the broader market and may not provide us accurate insight into the desires of people with insulin-dependent diabetes. In addition, understanding the meaning and significance of the responses received during our market research necessarily requires that analysis be conducted and conclusions be drawn. We may not be able perform an analysis that yields meaningful results, or the conclusions we draw from the analysis could be misleading or incorrect. Moreover, even if our market research has allowed us to better understand the features and functionality consumers are seeking in an insulin pump to improve management of their diabetes therapy, there can be no assurance that consumers will actually purchase our products or that our competitors will not develop products with similar features.

We ~~have a limited operating history upon~~expect to face complexities frequently encountered by companies in competitive and rapidly-evolving markets, which may make it difficult to evaluate our business and forecast our future sales and operating ~~results and may face difficulties frequently encountered by companies early~~results.

We operate in ~~their commercialization in~~a competitive and rapidly-evolving markets.*

We commenced operations in 2006, and began commercial sales of t:slim in the third quarter of 2012, of t:flex in the second quarter of 2015 and of t:slim G4 in the third quarter of 2015. Accordingly, we have a limited operating history upon which to evaluate our business and forecast our future sales and operating results. More recently, our commercial launches of t:slim X2 with G5 and t:lock,market. Important industry changes, such as the FDA approval and launch of new products by ~~one of~~ our competitors and the announcement by Johnson & Johnson that it is discontinuing the operations of Animas ~~Corporation~~ and exiting the insulin pump business, as well changes specific to our business, such as the recent approval of t:slim X2 with Basal-IQ technology and our commencement of commercial sales in international markets during the third quarter of 2018, combine to make it more difficult for us to predict our future sales and operating ~~results.~~results, as well as our expected timeframe to achieve profitability. In assessing our business prospects, you should consider these factors as well as the various risks and difficulties frequently encountered by companies ~~early in their commercialization history~~ in competitive and rapidly evolving markets, particularly those facing emerging growth companies that manufacture and sell medical devices.

As a result of these or other risks, we may not be able to execute key components of our business strategy, and our business, financial condition and operating results may suffer.

The Technology Upgrade Program resulted in accounting complexities that may lead to confusion when comparing our historical and future financial results.

While our Technology Upgrade Program expired on September 30, 2017, it resulted in a number of accounting complexities that will continue to make comparisons of our historical and future financial results more difficult. In particular, during the term of the Technology Upgrade Program, U.S. GAAP prevented us from recognizing, at the time of sale, up to 100% of the sales and cost of sales associated with the sale of our insulin pumps to eligible customers. Instead, depending on the type of pump sold, we were required to defer some or all of the sales and cost of sales until a later date. In light of the expiration of the Program, we are no longer subject to these accounting deferrals. However, in evaluating our 2017 financial results through December 31, 2017, as a result of the Technology Upgrade Program we recorded incremental net sales of $5.0 million that were previously deferred, with a corresponding increase of $3.1 million in gross profit. It is possible that we may offer other consumer directed programs in the future, which may result in similar or additional accounting complexities.

Despite our efforts to explain the required accounting treatment for the Technology Upgrade Program, it is possible that there may be confusion when comparing our historical and future financial results, which may cause our stock price to decline. For example, any revenue growth in 2018 on a U.S. GAAP basis is expected to be lower than the rate of growth on a product volume basis. In addition, the complexities associated with the Program may cause investors to avoid investing in our common stock until our financial results and trends are more predictable, which may also adversely impact our stock price.

Manufacturing risks may adversely affect our ability to manufacture products, which could negatively impact our sales and operating margins.*

Our business strategy depends on our ability to manufacture our current and proposed products in sufficient quantities and on a timely basis so as to meet consumer demand, while adhering to product quality standards, complying with regulatory requirements and managing manufacturing costs. We are subject to numerous risks ~~relating~~related to our manufacturing capabilities, including:

As demand for our products increases, and as the number of our commercial products expands, we will have to invest additional resources to purchase components, hire and train employees, and enhance our manufacturing processes and quality systems. Over the past year we have implemented several new pieces of equipment that are intended to improve our manufacturing capacity and efficiency and we expect to implement additional equipment and procedures over the next 12-18 months. However, it is possible that we may not achieve the anticipated improvements from these investments.

In addition, during 2016 we entered into a new lease agreement for an additional facility to consolidate substantially all of our manufacturing, warehousing and other operational needs, and the transition of these operations to a new facility is subject to additional risk and uncertainty, and may expose us to duplicative or incremental costs. While we have obtained the regulatory approvals necessary to commence manufacturing and shipping certain products from the new facility, we have not obtained approval to manufacture all of our products at this facility and the timing associated with obtaining the additional approvals is uncertain. Furthermore, although we expect some of our products under development to share product features and components with our current products, manufacturing of these products may require ~~the~~ modification of our production lines, ~~the~~ hiring of specialized employees, ~~the~~ identification of new suppliers for specific components, ~~the implementation of~~implementing additional equipment and procedures, obtaining new regulatory approvals, or ~~the development of~~developing new manufacturing technologies. Ultimately, it may not be possible for us to manufacture these products at a cost or in quantities sufficient to make these products commercially viable.

If we fail to increase our production capacity to meet consumer demand while also maintaining product quality standards, obtaining and maintaining regulatory approvals, and efficiently managing costs, our sales and operating margins could be negatively impacted, which would have an adverse impact on our financial condition and operating results.

We depend on a limited number of third-party suppliers for certain ~~product~~ components and products, and the loss of any of these suppliers, or their inability to provide us with an adequate supply of components or products, could harm our business.

We currently rely, and expect to continue to rely, on third-party suppliers to supply components of our current products and of our potential future products, including our disposable cartridges. For example, we rely on plastic injection molding companies to provide plastic molded components, electronic manufacturing suppliers to provide electronic assemblies, and machining companies to provide machined mechanical components. We also purchase all of our infusion sets and pump accessories from third-party suppliers. For our business strategy to be successful, our suppliers must be able to provide us with components and products in sufficient quantities, in compliance with regulatory requirements and quality control standards, in accordance with agreed-upon specifications, at acceptable costs and on a timely basis. ~~Recently,~~For example, we have implemented ~~several~~a business ~~strategies~~strategy intended to increase our future sales of infusion ~~sets. Increases~~sets, and any increase in ~~any~~the sales of our ~~product sales, whether forecasted or unanticipated,~~infusion sets could strain the ability of our suppliers to deliver ~~an increasingly large supply of components~~products in a manner that meets ~~these~~our various requirements.

We do not have long-term supply agreements with many of our suppliers and, in many cases, we make our purchases on a purchase order basis. Under most of our supply agreements, we have no obligation to buy any given quantity of components or products until we place written orders, and our suppliers have no obligation to manufacture for us or sell to us any given quantity of components or products until they accept an order. ~~As a result, our ability to purchase adequate quantities of our components or products may be limited. Additionally,~~In addition, our suppliers may encounter problems that limit their ability to manufacture components or products for us, including financial difficulties or damage to their manufacturing equipment or facilities. As a result, our ability to purchase adequate quantities of our components or products may be limited. If we fail to obtain sufficient quantities of ~~high quality~~high-quality components to meet demand on a timely basis, we could lose customer orders, our reputation may be harmed and our business could suffer. ~~Our conclusion that, unless we successfully raise additional capital, there is substantial doubt about~~Furthermore, negative perceptions among our suppliers regarding our financial stability, and our ability to ~~continue as~~sustain our business operations on a going concern, together with the inclusion of an explanatory paragraph that describes conditions that raise substantial doubt about our ability to continue as a going concern in our independent registered public accounting firm’s report contained in our financial statements for the year ended December 31, 2016,long-term basis, may cause one or more of our suppliers to terminate their relationship with us, or claim that our financial condition causes them to demand different payment terms.

We generally use a small number of suppliers for our components orand products. Depending on a limited number of suppliers exposes us to risks, including limited control over ~~pricing,~~cost, availability, quality and delivery schedules. Moreover, in some cases, we do not have long-standing relationships with our manufacturers and may not be able to convince suppliers to continue to make components available to us unless there is demand for such components from their other customers. As a result, there is a risk that certain components could be discontinued and no longer available to us. We have in the past been, and we may in the future be, required to make significant “last time” purchases of component inventory that is being discontinued by the manufacturer to ensure supply continuity. If any one or more of our suppliers cease to provide us with sufficient quantities of components in a timely manner or on terms acceptable to us, we would have to seek alternative sources of supply. Because of factors such as the proprietary nature of our products, our quality control standards and applicable regulatory requirements, we cannot quickly engage additional or replacement suppliers for some of our critical components. Failure of any of our suppliers to deliver products at the level our business requires ~~would~~could harm our reputation and limit our ability to meet our sales ~~commitments,~~projections, which ~~could harm our reputation and~~ could have a material adverse effect on our business.

We may also have difficulty obtaining similar components from other suppliers that are acceptable to the FDA, or other regulatory agencies, and the failure of our suppliers to comply with ~~strictly-enforced~~ regulatory requirements could expose us to regulatory action including warning letters, product recalls, termination of distribution, product seizures or civil penalties. Such a failure by our suppliers could also require us to cease using the components, seek alternative components or technologies, and modify our products to incorporate alternative components or technologies, which could necessitate additional regulatory approvals. Any disruption of this nature, or any increased expenses associated with any such ~~disruptions,~~disruption, could negatively impact our ability to manufacture our products on a timely basis, in sufficient quantities, or at all, which could harm our commercialization efforts and ~~adversely affect~~have a material adverse impact on our operating results.

If we cannot reliably manufacture ~~and sell~~ our new infusion set connector, ~~when anticipated,~~ or if it does not achieve market acceptance, we may not achieve our financial projections.*

In September 2017, we began commercial sales of products with ~~our~~ t:lock, ~~Connector,~~ which ~~replaces~~replaced the standard Luer-lok connector that historically joined an infusion set to our proprietary disposable insulin cartridges. Concurrently, we began selling infusion sets that are compatible with t:lock. Our ~~anticipated 2017 sales assume that our current and future customers will begin using our new cartridges and infusion sets with t:lock in significant quantities by the end of 2017. Furthermore, our~~ supplier of infusion sets must manufacture a variety of lengths and styles of infusion sets with t:lock that ~~matches~~match our cartridges. Failure to do so, or to do so at the necessary production volumes, may result in our inability to convert customers to t:lock when anticipated, ~~or at all,~~ which would negatively impact our ~~sales and operating margins.~~ability to achieve our financial projections.

In addition, ~~our~~certain independent distributors ~~will~~may need to ~~agree~~continue to purchase ~~the compatible~~both styles of insulin cartridges and infusion sets from us to provide to their customers. We ~~anticipate~~believe the transition period for our direct customers and distributors in the United States to utilize their inventory on hand before transitioning to t:lock ~~will be 90~~is substantially complete. However, we are initially offering standard Luer-lok cartridges and infusion sets in select international markets, and expect to ~~120 days following its initial launch. During this period~~transition to our t:lock connector in international markets during 2019. Accordingly, we ~~anticipate~~may continue offering both styles of cartridges and infusion sets to facilitate the transition of customer ~~supplies. However, due~~supplies through 2019, although there may be circumstances that require additional time for some direct customers and distributors to complete the transition. Due to the variability in purchasing patterns, standard Luer-lok inventory may not be consumed at the predicted rates and we may be required to offer both styles of insulin cartridges and infusion sets for a longer period than anticipated or we may be left with excess quantities of standard Luer-lok ~~style insulin cartridges~~inventory that we cannot sell at standard prices or at ~~all.~~all, which would negatively impact our results of operations.

While t:lock was designed based on customer feedback, and all standard Luer-lok infusion sets that we currently offer ~~will initially be made~~are also available with t:lock, it is possible that t:lock may not continue to gain market acceptance by current or potential customers, their caregivers, or healthcare providers. Any negative market response to t:lock may impact a current customer’s decision to purchase a new pump from us at the time of renewal. In addition, potential customers may decide not to purchase our insulin pumps if they do not prefer t:lock or t:lock compatible infusion sets, which ~~may impede~~could have a material adverse impact on our ~~ability to achieve our~~business, financial ~~projections.~~condition and operating results.

We currently operate primarily at two locations in San Diego, California, and any disruption at these locations could adversely affect our business and operating ~~results.~~results.*

Substantially all of our operations are ~~either conducted, or expected to be~~ conducted at two locations in San Diego, California, including our manufacturing processes, research and development activities, customer and technical support, and management and administrative functions. In addition, ~~substantially all~~the majority of our inventory of component supplies and finished goods are ~~held~~stored at one of these locations. We also store finished goods at a third-party warehouse operator in Austin, Texas for the fulfillment of certain customer orders. We take precautions to safeguard our facilities, including by acquiring insurance, employing back-up generators, adopting health and safety protocols and utilizing off-site storage of computer data. However, vandalism, terrorism or a natural ~~or other~~ disaster, such as an earthquake, fire or flood, or another catastrophic event, could damage or destroy our manufacturing equipment or our inventory of component supplies and finished goods, cause substantial delays in our operations, result in the loss of key information, result in reduced sales, and cause us to incur additional expenses. Our insurance coverage may not ~~cover our losses~~be sufficient to provide coverage with respect to the damages incurred in any particular ~~case.~~case, and our insurance carrier may deny coverage with respect to all or a portion of our claims. Regardless of the level of insurance coverage or other precautions taken, damage to our facilities may have a material adverse effect on our business, financial condition and operating results.

~~The~~We may not experience the anticipated operating efficiencies from the transition of our manufacturing operations to our new ~~facility may result in further delays or expenses, which may increase our manufacturing and operating costs and require us to spend additional capital.~~facility.*

~~We currently manufacture all~~At the beginning of ~~our insulin pump products and a significant portion of our cartridges at our headquarters in San Diego, California, but are in~~2018, we completed the ~~process of transitioning all~~transition of our manufacturing operations to ~~a nearby~~our Barnes Canyon facility that we expect will allow for future capacity expansion. The transition to the new manufacturing facility commenced during the second quarter of 2017 and we expect to complete the transition by the end of 2017. During the transition period we expect to experience some temporary duplication of operations to support ongoing product manufacturing ~~which will result in duplicative and incremental costs. In addition, while we have obtained certain governmental approvals~~ necessary to commence manufacturing and shipping certain products from the new facility, we have not obtained approval to manufacture all of our products at this facility and the timing associated with obtaining the additional approvals is uncertain. ~~We may continue to face significant challenges as we manage our proposed facility transition, such as additional delays or expenses, and~~expansion. However, we may ~~be required to make additional capital expenditures relating to~~not experience the ~~new facility. We also may experience unanticipated inefficiencies as we commence manufacturing operations~~anticipated operating efficiencies at the new facility, ~~particularly during the transition period.~~or we may experience efficiencies but to a lesser extent than projected. If we fail to achieve the operating efficiencies that we anticipate, ~~from the new facility, or if we incur substantial incremental costs during the transition,~~ our manufacturing and operating costs may be greater than ~~we anticipate.~~ expected, which would have a material adverse impact on our operating results.

In September 2017, following ana site inspection ~~relating to~~of our ~~new manufacturing~~Barnes Canyon facility, the FDA issued a Form 483, List of Inspectional Observations, containing two observations. Following our receipt of the Form 483, we began implementing corrective and preventive actions to fully address the FDA observations, and in October 2017, we ~~intend to provide~~provided a written ~~responses~~response to the ~~FDA detailing these corrective and preventive actions. While~~FDA. In December 2017, we ~~believe we will resolve this matter with~~received a letter from the FDA ~~without significant delay or expense,~~stating that our initial written response did not fully address the ~~outcome of this matter is presently uncertain. We cannot provide assurance~~FDA observations, and that the FDA ~~will conclude that our corrective and preventive actions are adequate to~~would address the ~~observations.~~observations during its next regularly scheduled inspection of our facilities. If the FDA is not satisfied, it may issue a warning letter to us or may take other actions, any of which could have a material adverse effect on our business. On August 29, 2018, we closed the voluntary recall initiated on April 19, 2018 for 55 t:slim G4 pumps.

We expect that the management and support of our ~~transition to~~new manufacturing facility and the ~~new facility~~increase of our manufacturing volumes will place significant burdens on our management team, particularly in areas relating to operations, quality, regulatory, facilities and information technology. ~~If we experience unanticipated employee turnover in any of these areas, we~~We may not be able to effectively manage ~~the completion of construction of the new facility or~~ our ~~transition and commencement of~~ongoing manufacturing operations ~~when planned~~ and we may not achieve the operating efficiencies that we anticipate from the new facility.

If we do not enhance our product offerings through our research and development efforts, we may fail to effectively compete, orwhich may impede our ability to become profitable.

In order to increase our sales and market share in the insulin-dependent diabetes market, we must enhance and broaden our product offerings in response to the evolving demands of people with insulin-dependent diabetes, their caregivers and healthcare providers, as well as competitive pressures and technologies. We may not be successful in developing, obtaining regulatory approval for, or marketing our proposed products when anticipated, or at all. In addition, notwithstanding our market research efforts, our future products may not be accepted by people with insulin-dependent diabetes, their caregivers, healthcare providers or third-party payors. The success of any proposed product offerings will depend on numerous factors, including our ability to:

If we fail to generate demand by continuing to develop products that incorporate features and functionality requested by people with insulin-dependent diabetes, their caregivers or healthcare providers, or if we do not obtain regulatory clearance or approval for proposed products in time to meet market demand, we may be unable to compete and may fail to generate sales sufficient to achieve or maintain profitability. We have in the past experienced, and we may in the future experience, delays in various phases of product development and commercialization, including during research and development, manufacturing, limited release testing, marketing and customer education efforts. Any delays in our anticipated regulatory submissions or approvals, or subsequent product launches, may significantly impede our ability to successfully compete in our markets. In particular, such delays could cause customers to delay or forego purchases of our products, or to purchase our competitors’ products. Even if we are able to successfully develop proposed products when anticipated, these products may not produce sales in excess of the costs of development, and they may be quickly rendered obsolete by changing consumer preferences or the introduction by our competitors of products embodying new technologies or features, or alternative methods for the treatment of diabetes.

The safety and efficacy of our products is not supported by long-term clinical data, which could limit sales, and our products could cause unforeseen negative effects.*

Our t:slim X2 ~~and t:flex~~insulin pump received ~~pre-market~~pre-market clearance under Section 510(k) of the U.S. Federal Food, Drug, and Cosmetic Act, or FDCA. The 510(k) clearance process is shorter and typically requires the submission of less supporting documentation than other FDA approval processes and does not always require long-term clinical studies. t:slim G4X2 with G5 and t:slim X2 with G5Basal-IQ technology received FDA approval under a ~~PMA.~~Premarket Approval, or PMA, application. However, currently there are noonly limited published studies to evaluate the safety or effectiveness of ~~t:slim G4 or t:slim X2 with G5~~our PMA approved products in a controlled setting.

As a result, we currently lack the breadth of published long-term clinical data supporting the safety and efficacy of our products and the benefits they ~~offer, that might have been generated in connection with other approval processes.~~offer. For these reasons, people with insulin-dependent diabetes and healthcare providers may be slower to adopt or recommend our products, we may not have comparative data that our competitors have or are generating, third-party payors may not be willing to provide coverage or reimbursement for our products and we may be subject to greater regulatory and product liability risks. These and other factors could slow the adoption of our products and result in our sales being lower than anticipated. In addition, future studies or clinical experience may indicate that treatment with our products is not superior to treatment with competitive products. Such results could slow the adoption of our products and significantly reduce our sales, which could prevent us from achieving our forecasted sales targets or achieving or sustaining profitability.

If the results of clinical studies or other experience, such as our monitoring or investigation of customer complaints, indicate that our products may cause or create an unacceptable risk of unexpected or serious complications or other unforeseen negative effects, we could be required to inform our customers of these risks or complications or, in more serious circumstances, we could be subject to mandatory product recalls, suspension or withdrawal of FDA clearance or approval, which could result in significant legal liability, ~~and~~ harm to our ~~business reputation.~~reputation, and a decline in our product sales.

Any alleged illness or injury associated with any of our products or product ~~recall~~recalls may negatively impact our financial results and business prospects depending on a number of factors, including the scope and seriousness of the problem, degree of publicity, reaction of our customers and healthcare professionals, ~~and collaborators,~~ competitive ~~reaction,~~response, and consumer ~~attitudes overall.~~perceptions generally. Even if such an allegation or product liability claim lacks merit, cannot be substantiated, is unsuccessful or is not fully pursued, the negative publicity surrounding any assertion that our products caused illness, injury or death could adversely affect our reputation with customers, healthcare professionals, third-party payors, and existing and potential collaborators, and could adversely affect our operating results and cause a decline in our stock price.

We may enter into collaborations, in-licensing arrangements, joint ventures, strategic alliances or partnerships with third parties that may not result in the development of commercially viable products or the generation of significant future revenues.*

In the ordinary course of our business, we may enter into collaborations, in-licensing arrangements, joint ventures, strategic alliances or partnerships to develop proposed products and to pursue new markets, or we may amend or modify similar agreements that we already have in place. Proposing, negotiating and implementing collaborations, in-licensing arrangements, joint ventures, strategic alliances or partnerships may be a lengthy and complex process. Other companies, including those with substantially greater financial, marketing, sales, technology or other business resources, may compete with us for these ~~opportunities or arrangements.~~opportunities. We may not identify ~~secure,~~ or complete any such transactions or arrangements in a timely manner, on a cost-effective basis, on acceptable terms or at all. ~~We have limited institutional knowledge and experience with respect to these business development activities, and~~In addition, we may ~~also~~ not realize the anticipated benefits of any such transaction or ~~arrangement.~~arrangement that we do identify and complete. In particular, these collaborations may not result in the development of products that achieve commercial success or result in ~~significant revenues~~positive financial results and could be terminated prior to developing any products.

Additionally, we may not be in a position to exercise sole decision-making authority regarding the transaction or arrangement, which could create the potential risk of creating impasses on decisions, and our collaborators may have economic or business interests or goals that are, or that may become, inconsistent with our business interests or goals. It is possible that conflicts may arise with our collaborators, such as conflicts concerning the achievement of performance milestones, or the interpretation of significant terms under any agreement, such as those related to financial obligations, termination rights or the ownership or control of intellectual property developed during the collaboration. If any conflicts arise with our current or future collaborators, they may act in their self-interest, which may be adverse to our best interest, and they may breach their obligations to us. In addition, we have limited control over the amount and timing of resources that our current collaborators, such as Dexcom and TypeZero, or any future collaborators devote to our arrangement with them or our future products. Disputes between us and our collaborators may result in litigation or arbitration which would increase our expenses and divert the attention of our management. Further, these transactions and arrangements are contractual in nature and may be terminated or dissolved under the terms of the applicable agreements and, in such event, we may not continue to have rights to the products relating to such transaction or arrangement or may need to purchase such rights at a premium.

For example, we have entered into ~~three separate~~multiple development agreements with Dexcom, which provide us non-exclusive licenses to integrate various generations of Dexcom CGM technology with our insulin pump products. ~~We currently offer t:slim G4 under an agreement that runs until January 4, 2018, with automatic one-year renewals.~~ Our agreements with Dexcom ~~which provide us non-exclusive licenses to integrate Dexcom G5 and G6 technology with our insulin pump products~~ currently run until June 2020 with automatic one-year renewals. Under certain circumstances, ~~our~~these agreements ~~with Dexcom~~ may be terminated by either party without cause or on short notice. Termination of any of our agreements with Dexcom could require us to redesign certain current products and products under development, and attempt to integrate an alternative CGM system into our insulin pump systems, which would require significant development and regulatory activities that could result in an interruption or substantial delay in the availability of the product to our customers.

We operate our business in regions subject to natural disasters and other catastrophic events, and any disruption to our business resulting from natural disasters will adversely affect our revenue and results of operations.*

We operate our business in regions subject to natural disasters, including earthquakes, hurricanes, floods, fires and other catastrophic events. Any natural disaster could adversely affect our ability to conduct business and provide products and services to our customers, and the insurance we maintain may not be adequate to cover our losses resulting from any business interruption resulting from a natural disaster or other catastrophic events.

Recently, Hurricane Irma and Hurricane Harvey adversely impacted our business operations in Texas, Florida and other nearby regions. These hurricanes directly and significantly affected our sales force, healthcare providers and potential customers, as well as distribution centers operated by certain of our independent distributors. Although our business operations have generally resumed in these areas, we are currently assessing the impact these hurricanes had and will continue to have on our customers, the demand for our products in the affected areas, the effectiveness of our sales force, and the ability of our distributors to meet their obligations to us. We expect it will be several weeks before we are able to fully assess the extent of the impact and the implications to our business.

~~These and any~~ Any future disruptions to our operations could have a material adverse impact on our financial condition and results of operations in future periods.

Any significant disruptions to our information technology systems, or failures of our pumps’ software to perform as we anticipate, could have an adverse effect on our business, financial condition and operating results.*

The efficient operation of our business depends on our information technology systems. We rely on our information technology systems to effectively manage sales and marketing data, accounting and financial functions, manufacturing and quality records, inventory management, product development tasks, research and development data, customer service and technical support functions. Our information technology systems, including those that support t:connect, as well as those involved in the operation of our Tandem Device Updater, are vulnerable to damage or interruption from earthquakes, fires, floods and other natural disasters, terrorist attacks, attacks by computer viruses or hackers, power losses, and computer system or data network failures. In addition, our currently-marketed insulin pumps, and our products currently under development contain software which could be subject to computer virus, hacker attacks or other failures. ~~As a result of the recent~~These risks significantly increased after July 2016, when we received FDA clearance of our Tandem Device Updater, which enables customers to remotely update software on their insulin ~~pumps, these~~pumps. We may also face new risks relating to our information technology systems as we begin to commercialize our products outside the United States and are ~~significantly increased.~~subject to additional regulations relating to the use and protection of personal information.

The failure of our or our service providers’ information technology systems or our pumps’ software to perform as we anticipate or our failure to effectively implement new information technology systems and privacy policies and controls could disrupt our entire operation or adversely affect our software products. For example, we market our Tandem Device Updater as having the unique capability to deploy software updates to our pumps, which ~~we anticipate~~ may allow customers remote access to new and enhanced features. The failure of our Tandem Device Updater to provide software updates as we anticipate, including as a result of our inability to secure and maintain necessary regulatory approvals, the inability of our pumps to properly receive software updates, errors or viruses embedded within the software being transmitted, or the failure of our customers to properly utilize the system to complete the update, could result in decreased sales, increased warranty costs, and harm to our reputation, all of which could have a material adverse effect on our business, financial condition and operating results.

~~If we fail to properly manage our anticipated growth, our business could suffer.~~

Our rapid growth has placed, and we expect that it will continue to place, a significant strain on our management team and financial resources. For example, between December 31, 2015 and December 31, 2016 our employee base increased by approximately 23%. In addition, during 2015 and 2016 we experienced turnover among key employees in our sales, marketing, clinical, and research and development functions, including the hiring of a new Chief Commercial Officer and a new Vice President of Engineering. Our failure to manage growth effectively could cause us to misallocate management or financial resources, negatively impact our ability to attract and retain key employees, and result in losses or weaknesses in our infrastructure, which could materially adversely affect our business. Additionally, our anticipated growth and the projected evolution of our product portfolio will increase the demands placed on our suppliers, resulting in an increased need for us to manage our suppliers and monitor for quality assurance. Any failure by us to manage our growth effectively could have an adverse effect on our ability to achieve our business objectives.

We depend on the knowledge and skills of our senior management and other key employees, and if we are unable to retain and motivate them or recruit additional qualified personnel, our business may suffer.*

We have benefited substantially from the leadership and performance of our senior management, as well as certain key employees. For example ~~our Chief Executive Officer, as well as other~~, key members of our management have experience successfully scaling an early stage medical device company to achieve profitability. Our success will depend on our ability to retain our current management and key employees, and to attract and retain qualified personnel in the future. Competition for senior management and key employees in our industry is intense and we cannot guarantee that we will be able to retain our personnel or attract new, qualified personnel. ~~This may be especially true during periods in which we face challenges such as financial difficulty or a reduced stock price.~~ The loss of the services of certain members of our senior management or key employees could prevent or delay the implementation and completion of our strategic objectives, or divert management’s attention to seeking qualified replacements. Each member of senior management as well as our key employees may terminate employment without notice and without cause or good reason. The members of our senior management are not subject to non-competition agreements. Accordingly, the adverse effect resulting from the loss of certain members of senior management could be compounded by our inability to prevent them from competing with us.

We depend upon key employees in a competitive market, and if we are unable to provide meaningful equity incentives to retain key personnel, it could adversely affect our ability to execute our business strategy.*

We are highly dependent upon the members of our ~~executive~~ management team, as well as other key employees. Many of these individuals have been employed by us for many years, have played integral roles in the growth of our business, and will continue to provide value to us. In our industry, it is common to attract and retain executive talent and other employees with compensation packages that include a significant equity component. At this time, a substantial number of our outstanding equity awards issued prior to 2017, which generally ~~are~~were issued in the form of stock options, are significantly ~~devalued or~~ out of the money and ~~less likely~~unlikely to be ~~exercisable~~exercised in the future. We ~~plan~~have issued, and may continue to issue, additional equity incentives that we believe will enhance our ability to retain our current key employees and attract the necessary additional executive ~~talent, which may include the repricing of stock options.~~talent. However, even if we issue significant additional equity incentives, there can be no assurance that we will be able to attract and retain key executive talent. A loss of any of our key personnel, or our inability to hire new personnel, may have a material adverse effect on our ability to execute our business strategy.

If we are found to have violated laws protecting the confidentiality of patient health information or other personal information, we could be subject to civil or criminal penalties, which could increase our liabilities and harm our reputation or our business.

There are a number of federal and state laws protecting the confidentiality and security of personal information, including certain patient health information, ~~including patient records,~~ and restricting the use and disclosure of that protected information. In particular, the U.S. Department of Health and Human Services, or HHS, promulgated ~~patient~~ privacy and security rules under ~~HIPAA. These~~the Health Insurance Portability and Accountability Act of 1996, or HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH. The privacy ~~rules protect~~rule protects medical records and other personal health information by limiting their use and disclosure, giving individuals the right to access, amend and seek accounting of their own health information and limiting most use and disclosures of health information to the minimum amount reasonably necessary to accomplish the intended purpose. The security rule protects protected health information, or PHI, stored electronically by requiring appropriate administrative, physical and technical safeguards to ensure the confidentiality, integrity and security of such PHI. If we, or any of our service providers, are found to be in violation of the promulgated ~~patient~~ privacy and security rules under HIPAA and HITECH, we could be subject to civil or criminal penalties, which could increase our liabilities, harm our reputation and have a material adverse effect on our business, financial condition and operating results.

We may also face new risks relating to security laws and privacy rights as individual states adopt new laws and regulations on these topics and as we begin to commercialize our products outside the United States. For example, in the European Union, the General Data Protection Regulation, or GDPR, which came into force on May 25, 2018, introduces new data protection requirements in the European Union. As we expand internationally, our business will need to be adapted to meet these and other similar legal requirements.

We are seeking approval to commercialize our products outside of the United States, which may result in a variety of risks associated with international operations that could materially adversely affect our business.*

During the third quarter of 2018, we began commercialization of the t:slim X2 insulin pump in select geographies outside of the United States. We do not have experience commercializing our products outside of the United States and expect that we will be subject to additional risks related to entering into international business markets, including:

In addition, entry into international markets may require significant financial resources, impose additional demands on our manufacturing, quality, regulatory, customer support and other general and administrative personnel, and could divert management’s attention from managing our core business. We have limited experience with regulatory environments and market practices internationally, and we may not be able to penetrate or successfully operate in new markets. Accordingly, if we are unable to expand internationally, manage the complexity of our global operations successfully or if we incur unanticipated expenses, we may not achieve the expected benefits of this expansion and our financial condition and results of operations could be materially and adversely impacted.

We may seek to grow our business through acquisitions of complementary products or technologies, and the failure to successfully manage acquisitions, or the failure to integrate them with our existing business, could have a material adverse effect on our business, financial condition and operating results.

From time to time, we may consider opportunities to acquire other products or technologies that may enhance our product platform or technology, expand the breadth of our markets or customer base, or advance our business strategies. Potential acquisitions involve numerous risks, including:

We have no current commitments with respect to any acquisition. We do not know if we will be able to identify acquisitions we deem suitable, whether we will be able to successfully complete any such acquisitions on favorable terms or at all, or whether we will be able to successfully integrate any acquired products or technologies into our business. Our potential inability to integrate any acquired products or technologies effectively may adversely affect our business, operating results and financial condition.

We ~~will~~may need to raise additional funds in the ~~future. If these~~future and if we are unable to raise additional funds ~~are~~when necessary, we may not ~~available~~be able to ~~us, we will not have sufficient cash to fund~~achieve our ~~operations for the next twelve months.~~strategic objectives.*

AtAs of September 30, ~~2017,~~2018, we had ~~$22.5~~ $113.6 million in cash, cash equivalents and short-term ~~investments, which included $10.0 million of restricted cash. At the date our financial statements in this Quarterly Report were issued, our~~investments. Our management believed that we did not have sufficient cash to fund our operations for the next twelve months without additional financing and therefore, we concluded there was substantial doubt about our ability to continue as a going concern within one year after the date the financial statements were issued. Moreover,expects the continued growth of our business, including the expansion of our customer ~~care~~service infrastructure to support our growing base of customers our plans to commence commercial sales of our products outside the United States and additional research and development activities, ~~and the transition to our new manufacturing facility,~~ will continue to increase our ~~expenses and capital needs.~~expenses. In addition, the amount of our future product sales is difficult to predict and actual sales may not be in line with our forecasts. ~~Our~~Accordingly, our future capital requirements will depend on many factors, including:

We may in the future seek additional capital from public or private offerings of our capital stock, ~~(including our ATM offering) or we may elect to borrow additional amounts under new credit lines~~ or from other sources. If we issue equity or debt securities to raise additional funds, our existing stockholders may experience dilution, we may incur significant financing costs, and the new equity or debt securities may have rights, preferences and privileges senior to those of our existing stockholders. In addition, if we raise additional funds through collaborations, licensing, joint ventures, strategic alliances, partnership arrangements or other similar arrangements, it may be necessary to relinquish valuable rights to our potential future products or proprietary technologies, or grant licenses on terms that are not favorable to us.

If we are unable to raise additional capital when necessary, we may not be able to maintain our existing sales, marketing, clinical and customer ~~care~~service infrastructure, enhance our current products or develop new products, take advantage of future opportunities, respond to competitive pressures, changes in supplier relationships, or unanticipated changes in customer ~~demand, or satisfy covenants in our existing indebtedness.~~demand. Any of these events could adversely affect our ability to achieve our strategic objectives, which could have a material adverse effect on our business, financial condition and operating results.

There has been and may continue to be meaningful variability in our operating results from quarter to quarter, as well as within each quarter, especially around the time of anticipated new product ~~introductions.~~launches or regulatory approvals by us or our competitors. Our operating results, and the variability of these operating results, will be affected by numerous factors, including:

In addition, we expect our operating expenses will continue to increase as we expand our ~~business. Accordingly, we~~business, which may ~~experience substantial variability~~exacerbate the quarterly fluctuations in our operating ~~results from quarter to quarter.~~results. If our quarterly or annual operating results fall below the expectation of investors or securities analysts, the price of our common stock could decline ~~substantially as has occurred over the past several months.~~substantially. Further, any quarterly or annual fluctuations in our operating results may, in turn, cause the price of our common stock to fluctuate ~~substantially.~~substantially, and these price fluctuations could result in further pressure on our stock price. We believe ~~that~~ quarterly comparisons of our financial results are not necessarily meaningful and should not be relied upon as an indication of our future performance.

We have concluded that we do not have sufficient cash to fund our operations for the next twelve months without additional financing and, therefore, there was substantial doubt about its ability to continue as a going concern within one year after the date the financial statements were issued, which could have a material adverse impact on our business.*

At the date the financial statements in this Quarterly Report were issued, our management believed that we did not have sufficient cash to fund our operations for the next twelve months without additional financing and, therefore, we concluded there was substantial doubt about our ability to continue as a going concern within one year after the date the financial statements were issued. ~~The financial statements included in this Quarterly Report have been prepared on a basis that assumes that we will continue as a going concern,~~ ~~which contemplates the realization of assets and the satisfaction of liabilities and commitments in the normal course of business.~~

Our ability to continue as a going concern is dependent upon a number of factors, including our ability to increase our sales and gross profits, our ability to generate positive cash flow from operations, and our ability to obtain the necessary financing to meet our obligations and repay our liabilities arising from obligations that become due in the ordinary course of business. Management currently believes that it will be necessary for us to raise additional funding. However, our conclusion that there is substantial doubt about our ability to continue as a going concern may be viewed unfavorably by current and prospective investors, as well as by analysts and creditors. As a result, this conclusion may make it more difficult for us to raise the additional financing necessary to continue to operate our business. In addition, this conclusion may make it more difficult for us to sell our products and meet our sales forecasts, which may further impede our ability to raise additional financing.

If we cannot generate sufficient revenues from the sale of our products or secure additional financing on acceptable terms, we may be forced to significantly alter our business strategy, substantially curtail our current operations, or cease operations altogether.

~~We may not be able to generate sufficient cash to service our indebtedness, which currently consists of our Term Loan Agreement with Capital Royalty Partners.~~

At December 31, 2016, we had $81.1 million aggregate borrowings outstanding under the Term Loan Agreement with Capital Royalty Partners. Our ability to make scheduled payments or to refinance our debt obligations depends on numerous factors, including the amount of our cash reserves at the time a scheduled payment becomes due and our actual and projected financial and operating performance. The amount of our cash reserves and our financial and operating performance are subject to certain financial and business factors, as well as prevailing economic and competitive conditions, some of which may be beyond our control. We cannot assure you that we will maintain a level of cash reserves or cash flows from operating activities sufficient to permit us to pay the principal, premium, if any, or interest on our existing or future indebtedness.

If our cash balances or cash flows from operations are insufficient to fund our debt service obligations, we may be forced to reduce or delay capital expenditures, sell or license our assets, sell or reduce our operations, seek additional capital on unfavorable terms, or restructure or refinance our indebtedness. We cannot assure you that we would be able to take any of these actions, or that these actions would permit us to meet our scheduled debt service obligations. Our recent and projected financial results, the explanatory paragraph that describes conditions that raise substantial doubt about our ability to continue as a going concern in the report of our independent registered public accounting firm, and general concerns among potential investors and creditors about our financial well-being may make taking such actions on commercially reasonable terms especially difficult. If we are unable to generate sufficient cash flow or are otherwise unable to obtain the funds necessary to meet required payments of principal, premium, if any, and interest on our indebtedness, we could be in default under the terms of the Term Loan Agreement.

The Term Loan Agreement contains restrictive and financial covenants that may limit our operating flexibility, and our potential inability to comply with such covenants puts us at risk of triggering an event of default under the Term Loan Agreement.*

The Term Loan Agreement contains certain restrictive covenants that limit our ability to incur additional indebtedness and liens, merge with other companies or consummate certain changes of control, acquire other companies, engage in new lines of business, make certain investments, pay dividends, transfer or dispose of assets, amend certain material agreements or enter into various specified transactions. We may not be able to engage in any of the foregoing transactions unless we obtain the consent of Capital Royalty Partners or terminate the Term Loan Agreement.

The Term Loan Agreement also contains certain financial covenants, including minimum revenue and cash balance requirements, and financial reporting requirements. There is no guarantee that we will be able to generate sufficient cash flow or sales to meet the financial covenants or pay the principal and interest under the Term Loan Agreement. Further, there is no guarantee that future working capital, borrowings or equity financing will be available to repay or refinance the amounts outstanding under the Term Loan Agreement.

The terms of the Term Loan Agreement also require that we deliver audited financial statements that include an unqualified audit report to Capital Royalty Partners. The audit report and opinion of our independent registered public accounting firm contained in our financial statements for the year ended December 31, 2016 includes an explanatory paragraph that describes conditions that raise substantial doubt about our ability to continue as a going concern. This explanatory paragraph in our auditor’s report constitutes a potential event of default under the Term Loan Agreement. As a result, in March 2017, we entered into Waiver and Amendment No. 4 to Term Loan Agreement, or the Fourth Amendment, which includes a limited waiver of a potential event of default that could have resulted from the inclusion of the explanatory paragraph in our auditor’s report. The Fourth Amendment also imposes additional restrictive and financial covenants on us, which may increase our risk of triggering defaults under the Term Loan Agreement.

In the event of a future default triggered by any violations of the covenants in the Term Loan Agreement, we will need to obtain additional waivers from Capital Royalty Partners to avoid being in default. For example, if the audit report and opinion of our independent registered public accounting firm contained in our financial statements for the year ending December 31, 2017 includes an explanatory paragraph that describes conditions that raise substantial doubt about our ability to continue as a going concern, it could constitute a potential event of default under the Term Loan Agreement for which we are required to seek a waiver. If we are unable to obtain a waiver of any events of default, or an amendment to the Term Loan Agreement that would allow us to be in compliance with the terms of the agreement, an event of default would result.

In the event of our default under of the Term Loan Agreement, we may be required to repay any outstanding amounts earlier than anticipated and our capital resources may not be sufficient to meet those obligations. Further, if we are unable to repay our indebtedness and Capital Royalty Partners institutes foreclosure proceedings against our assets, we could be forced into bankruptcy or liquidation, and in such a scenario, the values that we receive for our assets could be significantly lower than the values reflected in our financial statements.

Our ability to protect our intellectual property and proprietary technology is uncertain.*

We rely primarily on patent, trademark and trade secret laws, as well as confidentiality and non-disclosure agreements, to protect our proprietary technologies. As of September 30, ~~2017,~~2018, our patent portfolio consisted of approximately 5568 issued U.S. patents and 5249 pending U.S. patent applications. Of these, our issued U.S. patents expire between approximately 2021 and ~~2035.~~2036. We also have and are seeking patent protection for our proprietary technologies in other countries throughout the world. In addition, we have 1017 U.S. trademark registrations and 1317 foreign trademark registrations.

We have applied for patent protection relating to certain existing and proposed products and processes. If we fail to file a patent application timely in any jurisdiction, we may be precluded from doing so at a later date. Further, we cannot assure you that any of our patent applications will be approved in a timely manner or at all. The rights granted to us under our patents, and the rights we are seeking to have granted in our pending patent applications, may not be meaningful or provide us with any commercial advantage. In addition, those rights could be opposed, contested or circumvented by our competitors, or be declared invalid or unenforceable in judicial or administrative proceedings. The failure of our patents to adequately protect our technology might make it easier for our competitors to offer the same or similar products or technologies. Even if we are successful in receiving patent protection for certain products and processes, our competitors may be able to design around our patents or develop products that provide outcomes which are comparable to ours without infringing on our intellectual property rights. Due to differences between foreign and U.S. patent laws, our patented intellectual property rights may not receive the same degree of protection in foreign countries as they would in the United States. Even if patents are granted outside of the United States, effective enforcement in those countries may not be available.

We rely on our trademarks and trade names to distinguish our products from the products of our competitors, and have registered or applied to register many of these trademarks. We cannot assure you that our current or future trademark applications will be approved in a timely manner or at all. Third parties also may oppose our trademark applications, or otherwise challenge our use of the trademarks. In the event that our trademarks are successfully challenged, we could be forced to rebrand our products, which could result in loss of brand recognition, and could require us to devote additional resources to marketing new brands. Further, we cannot assure you that competitors will not infringe upon our trademarks, or that we will have adequate resources to enforce our trademarks.

We have entered into confidentiality agreements and intellectual property assignment agreements with our officers, employees, temporary employees and consultants regarding our intellectual property and proprietary technology. In the event of unauthorized use or disclosure or other breaches of those agreements, we may not be provided with meaningful protection for our trade secrets or other proprietary information.

If a competitor infringes upon one of our patents, trademarks or other intellectual property rights, enforcing those patents, trademarks and other rights may be difficult, expensive and time consuming. Patent law relating to the scope of claims in the industry in which we operate is subject to rapid change and constant evolution and, consequently, patent positions in our industry can be uncertain. Even if successful, litigation to defend our patents and trademarks against challenges or to enforce our intellectual property rights ~~could be expensive and time consuming and~~ could divert management’s attention from managing our business. Moreover, we may not have sufficient resources or incentive to defend our patents or trademarks against challenges or to enforce our intellectual property rights. Litigation also puts our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing. Additionally, pursuing litigation may provoke third parties to assert counterclaims against us. We may not prevail in any lawsuits that we initiate and the damages or other remedies awarded, if any, may not be commercially valuable. The occurrence of any of these events may have a material adverse effect on our business, financial condition and operating results.

The medical device industry is characterized by patent litigation, and from time to time, we may be subject to litigation that could be costly, result in the diversion of management’s time and efforts, or require us to pay damages.*

Our success will depend in part on not infringing the patents or violating the other proprietary rights of third parties. Significant litigation regarding patent rights exists in our industry. Our competitors in both the United States and abroad, many of which have substantially greater resources and have made substantial investments in competing technologies, may have applied for or obtained or may in the future apply for and obtain, patents that will prevent, limit or otherwise interfere with our ability to make and sell our products. The large number of patents, the rapid rate of new patent issuances, and the complexities of the technology involved increase the risk of patent litigation.

From time to time, we may receive communications from third parties alleging our infringement of their intellectual property ~~rights.~~rights or offering a license to intellectual property that is alleged to relate to future products that we are currently developing. Any intellectual property ~~dispute~~related discussions, disputes or litigation could force us to do one or more of the following:

We do not currently maintain insurance to cover the expense or any liability that may arise from an intellectual property dispute with a third party. Any litigation or claim against us, even those without merit, or even preparing for a potential dispute or litigation before it arises, may cause us to incur substantial costs, and could place a significant strain on our financial resources, divert the attention of management from our core ~~business and~~business. Any litigation or claim against us may also harm our reputation. Further, as we launch new products and increase our sales, and the number of participants in the diabetes market increases, we believe the possibility of our involvement in intellectual property ~~infringement claims against us~~disputes increases.

We may be subject to damages resulting from claims that we, or our employees, have wrongfully used or disclosed alleged trade secrets of our competitors or are in breach of non-competition or non-solicitation agreements with our competitors.*

Many of our employees were previously employed at other medical device companies, including those that are our direct competitors or could potentially become our direct competitors. In some cases, those employees joined our company recently. We may be subject to claims that we, or our employees, have inadvertently or otherwise used or disclosed trade secrets or other proprietary information of these former employers or competitors. In addition, we have been and may in the future be subject to allegations that we caused an employee to breach the terms of his or her non-competition or non-solicitation agreement. Litigation may be necessary to defend against these claims. Even if we successfully defend against these claims, litigation could cause us to incur substantial costs, and could place a significant strain on our financial resources, divert the attention of management from our core business and harm our reputation. If our defense to those claims fails, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel. We cannot guarantee that this type of litigation will not continue, and any future litigation or the threat thereof may adversely affect our ability to hire additional direct sales representatives. A loss of key personnel or their work product could hamper or prevent our ability to commercialize proposed products, which could have an adverse effect on our business, financial condition and operating results.

We may incur product liability losses, and insurance coverage may be inadequate or unavailable to cover these losses.

Our business exposes us to potential product liability claims that are inherent in the design, manufacture, testing and sale of medical devices. We could become the subject of product liability lawsuits alleging that component failures, manufacturing flaws, design defects or inadequate disclosure of product-related risks or product-related information resulted in an unsafe condition, injury or death to customers. The risk of one or more product liability claims or lawsuits may be even greater ~~following~~after we launch new products with new features or enter new markets where we have no prior experience selling our ~~January 2014 voluntary recall of cartridges used with t:slim.~~products and rely on newly hired staff or new independent distributors or contractors to provide new customer training and customer support. In addition, the misuse of our products or the failure of customers to adhere to operating guidelines could cause significant harm to customers, including death, which could result in product liability claims. We may also identify deficiencies in our products that we determine are immaterial and do not pose safety risks, and therefore decide not to initiate a voluntary recall. However, any such deficiency may be more significant than we expect and lead to product liability claims. Product liability lawsuits and claims, safety alerts or product recalls, with or without merit, could cause us to incur substantial costs, and could place a significant strain on our financial resources, divert the attention of management from our core business, harm our reputation and adversely affect our ability to attract and retain customers, any of which could have a material adverse effect on our business, financial condition and operating results.

Although we maintain third-party product liability insurance coverage, it is possible that claims against us may exceed the coverage limits of our insurance policies. Even if any product liability loss is covered by an insurance policy, these policies typically have substantial deductibles for which we are responsible. In addition, we expect the cost of our product liability insurance will increase as our product sales increase and we may also increase the amount of our deductibles over time. Product liability claims in excess of applicable insurance coverage could have a material adverse effect on our business, financial condition and operating results. In addition, any product liability claim brought against us, with or without merit, could result in ~~an increase~~further increases of our product liability insurance premiums. Insurance coverage varies in cost and can be difficult to obtain, and we cannot guarantee that we will be able to obtain insurance coverage in the future on terms acceptable to us or at all. Our inability to obtain sufficient insurance coverage to protect again potential product liability claims could prevent or limit our commercialization of current products or products currently under development.

Our products and operations are subject to extensive governmental regulation, and failure to comply with applicable requirements could cause our business to suffer.*

The medical device industry is regulated extensively by governmental authorities, principally the FDA and corresponding state regulatory agencies. The regulations are very complex and are subject to rapid change and varying interpretations. Regulatory restrictions or changes could limit our ability to carry on or expand our operations or result in higher than anticipated costs or lower than anticipated sales. The FDA and other U.S. governmental agencies regulate numerous elements of our business, including:

Before we can market or sell a new regulated product or a significant modification to an existing product in the United States, we must obtain either clearance under Section 510(k) of the FDCA or approval of a ~~Premarket Approval, or~~ PMA application from the FDA, unless an exemption from pre-market review applies. In the 510(k) clearance process, the FDA must determine that a proposed device is “substantially equivalent” to a device legally on the market, known as a “predicate” device, with respect to intended use, technology and safety and effectiveness, in order to clear the proposed device for marketing. Clinical data is sometimes required to support substantial equivalence. The PMA pathway requires an applicant to demonstrate the safety and effectiveness of the device based on extensive data. The PMA process is typically required for devices that are deemed to pose the greatest risk, such as life-sustaining, life-supporting or implantable devices. We received approval of our PMA for t:slim G4 in September 2015 and of our PMA supplement for t:slim X2 with G5 in August 2017. More recently, we received approval of our PMA for t:slim X2 with Basal-IQ technology in June 2018. Products that are approved through a PMA application generally need FDA approval before they can be modified. Similarly, some modifications made to products cleared through a 510(k) may require a new 510(k). The process of obtaining regulatory clearances or approvals to market a medical device can be costly and time-consuming, and we may not be able to obtain these clearances or approvals on a timely basis or at all for our proposed products.

We initially received pre-market clearance for t:slim under Section 510(k) of the FDCA in November 2011. We obtained 510(k) clearances for t:connect and t:flex in February 2013 and January 2015, respectively. From time to time, we may make modifications to these products that may require a new 510(k). We have received 510(k) clearance for various modifications to t:slim and its associated cartridge. For instance, in July 2016, we received 510(k) clearance to reduce the age in our indications for use of t:slim to age six. We may pursue 510(k) clearance for additional products or product modifications in the future. If the FDA requires us to go through a more rigorous examination for future products or modifications to existing products than we had expected, our product introductions or modifications could be delayed or canceled, which could cause our sales to decline or to not increase in line with our forecasts. We anticipate that certain of our products currently under development will require the more costly, lengthy and uncertain PMA approval process.

The FDA can delay, limit or deny clearance or approval of one of our devices for many reasons, including:

In addition, the FDA may change its clearance and approval policies, adopt additional regulations or revise existing regulations, or take other actions which may prevent or delay approval or clearance of our products under development or impact our ability to modify our currently cleared or approved products on a timely basis. For example, based on feedback from the FDA we recently submitted a de novo 510(k) for our t:slim X2 insulin pump platform and we intend to separately file a PMA for our implementation of the Control-IQ technology. Ultimately, the FDA may not support our new regulatory filing strategy.

Any delay in, or failure to receive or maintain, clearance or approval for our products under development could prevent us from generating revenue from these products or achieving profitability. Additionally, the FDA and other regulatory authorities have broad enforcement powers. Regulatory enforcement or inquiries, or other increased scrutiny on us, could dissuade some customers from using our products and adversely affect our reputation and the perceived safety and efficacy of our products.

Failure to comply with applicable regulations could jeopardize our ability to sell our products and result in enforcement actions such as fines, civil penalties, injunctions, warning letters, recalls of products, delays in the introduction of products into the market, refusal of the FDA or other regulators to grant future clearances or approvals, delays by the FDA or other regulators in granting clearances or approvals, and the suspension or withdrawal of existing approvals by the FDA or other regulators. Any of these sanctions could result in higher than anticipated costs, lower than anticipated sales, and diversion of management time and resources, any of which could have a material adverse effect on our reputation, business, financial condition and operating results.

Further, we ~~are evaluating~~commenced commercial sales of our products in select international ~~expansion opportunities for a potential launch in~~markets during the third quarter of 2018. IfAs we expand our operations outside of the United States, we will become subject to various additional regulatory and legal requirements under the applicable laws and regulations of the international markets we enter. These additional regulatory requirements may involve significant costs and expenditures and, if we are not able to comply with any such requirements, our international expansion and business could be significantly harmed.

Modifications to our products may require new 510(k) clearances or PMAs, or may require us to cease marketing or recall the modified products until clearances are obtained.

Any modification to a 510(k)-cleared device that could significantly affect its safety or effectiveness, or that would constitute a major change in its intended use, design, or manufacture, requires a new 510(k) clearance or, possibly, a PMA. The FDA requires every manufacturer to make this determination in the first instance, but the FDA may review any manufacturer’s decision. The FDA may not agree with our decisions regarding whether new clearances or approvals are necessary for changes that we have made to our products. If the FDA disagrees with our determination and requires us to submit new 510(k) notifications or PMAs for modifications to our previously cleared or approved products, for which we concluded that new clearances or approvals were not necessary, we may be required to cease marketing or to recall the modified product until we obtain clearance or approval, and we may be subject to significant regulatory fines or penalties.

Further, the FDA’s ongoing review of and potential changes to the 510(k) program may make it more difficult for us to modify our previously cleared products, either by imposing stricter requirements on when a new 510(k) for a modification to a previously cleared product must be submitted, or by applying more onerous review criteria to such submissions.

If we or our third-party suppliers fail to comply with the FDA’s good manufacturing practice regulations, this could impair our ability to market our products in a cost-effective and timely manner.

We and our third-party suppliers are required to comply with the FDA’s Quality System Regulation, or QSR, which covers the methods and documentation of the design, testing, production, control, quality assurance, labeling, packaging, sterilization, storage and shipping of our products. The FDA audits compliance with the QSR through periodic announced and unannounced inspections of manufacturing and other facilities. The FDA may impose inspections or audits at any time. If we or our suppliers have significant non-compliance issues or if any corrective action plan that we or our suppliers propose in response to observed deficiencies is not sufficient, the FDA could take enforcement action against us. Any of the foregoing actions could have a material adverse effect on our reputation, business, financial condition and operating results.

A recall of our products, or the discovery of serious safety issues with our products, could have a significant negative impact on us.*

The FDA has the authority to require the recall of commercialized products in the event of material deficiencies or defects in design or manufacture or in the event that a product poses an unacceptable risk to health. The FDA has broad discretion to require the recall of a product or to require that manufacturers alert customers of safety risks, and may do so even in circumstances where we do not believe our product poses an unacceptable risk to health. In addition, manufacturers may, under their own initiative, recall a product if any material deficiency in a product is ~~found.~~found or alert customers of unanticipated safety risks. This is not uncommon in our industry and we currently have ongoing voluntary recalls of products that we initiated during 2018. A government-mandated or voluntary recall by us, one of our distributors or any of our other third-party suppliers could occur as a result of an unacceptable risk to health, component failures, manufacturing errors, design or labeling defects or other deficiencies and issues. Recalls ofor notices relating to any products that we distribute would divert managerial and financial resources, and have an adverse effect on our reputation, financial condition and operating results.

Further, under the FDA’s Medical Device Reporting, or MDR, regulations, we are required to report to the FDA any incident in which our product may have caused or contributed to a death or serious injury or in which our product malfunctioned and, if the malfunction were to recur, would likely cause or contribute to death or serious injury. Repeated product malfunctions may result in a voluntary or involuntary product recall, which could divert managerial and financial resources, impair our ability to manufacture our products in a cost-effective and timely manner and have an adverse effect on our reputation, financial condition and operating results.

Any adverse event involving any products that we distribute could result in future voluntary corrective actions, such as recalls or customer notifications, or regulatory agency action, which could include inspection, mandatory recall or other enforcement action. Any corrective action, whether voluntary or involuntary, will require the dedication of our time and capital, distract management from operating our business and may harm our reputation and financial results.

Our failure to comply with U.S. federal and state fraud and abuse laws, including anti-kickback laws and other U.S. federal and state anti-referral laws, could have a material adverse impact on our business.

There are numerous U.S. federal and state laws pertaining to healthcare fraud and abuse, including anti-kickback laws and physician self-referral laws. Our relationships with healthcare providers and other third parties are subject to scrutiny under these laws. Violations of these laws are punishable by criminal and civil sanctions, including, in some instances, imprisonment and exclusion from participation in federal and state healthcare programs, including the Medicare, Medicaid and Veterans Administration health programs.

Healthcare fraud and abuse regulations are complex, and even minor irregularities can potentially give rise to claims that a statute or prohibition has been violated. The laws that may affect our ability to operate include:

Further, the Patient Protection and Affordable Care Act, as amended by the Healthcare and Education Affordability Reconciliation Act, or, collectively, the PPACA, among other things, amends the intent requirement of the federal anti-kickback and criminal healthcare fraud statutes. An individual or entity can now be found guilty under the PPACA without actual knowledge of the statute or specific intent to violate it. In addition, the PPACA provides that claims submitted in violation of the Anti-Kickback Statute automatically constitute false claims for purposes of the False Claims Act. Possible sanctions for violation of these laws include monetary fines, civil and criminal penalties, exclusion from Medicare, Medicaid and other federal healthcare programs, and forfeiture of amounts collected in violation of those prohibitions. Any violation of these laws, or any action against us for violation of these laws, even if we successfully defend against it, could result in a material adverse effect on our reputation, business, financial condition and operating results.

To enforce compliance with the federal laws, the U.S. Department of Justice, or DOJ, has ~~recently~~ increased its scrutiny of interactions between healthcare companies and healthcare providers, which has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry. Dealing with investigations can be time- and resource-consuming and can divert management’s attention from our core business. Additionally, if a healthcare company settles an investigation with the DOJ or other law enforcement agencies, we may be forced to agree to additional onerous compliance and reporting requirements as part of a consent decree or corporate integrity agreement. Any such investigation or settlement could increase our costs or otherwise have an adverse effect on our business.

The scope and enforcement of these laws is uncertain and subject to rapid change in the current environment of healthcare reform. Federal or state regulatory authorities might challenge our current or future activities under these laws. Any of these challenges could have a material adverse effect on our reputation, business, financial condition and operating results. Any state or federal regulatory review of us, regardless of the outcome, would be costly and time-consuming. Additionally, we cannot predict the impact of any changes in these laws, whether or not retroactive.

We may be liable if we engage in the promotion of the off-label use of our products.

Our promotional materials and training methods must comply with FDA and other applicable laws and regulations, including the prohibition against the promotion of the off-label use of our products or the pre-promotion of unapproved products. Healthcare providers may use our products off-label, as the FDA does not restrict or regulate a physician’s choice of treatment within the practice of medicine. However, if the FDA determines that our promotional materials or training constitutes promotion of an off-label use or the pre-promotion of an unapproved product, it could request that we modify our training or promotional materials or subject us to regulatory or enforcement actions, including the issuance of an untitled letter, a warning letter, injunction, seizure, civil fine and criminal penalties. It is also possible that other federal, state or foreign enforcement authorities might take action if they consider our promotional or training materials to constitute promotion of an unapproved use, which could result in significant fines or penalties. Although our policy is to refrain from statements that could be considered off-label promotion of our products or pre-promotion of an unapproved product, the FDA or another regulatory agency could disagree and conclude that we have engaged in ~~off-label promotion.~~improper promotional activities. In addition, the off-label use of our products may increase the risk of product liability claims, which are expensive to defend and could result in substantial damage awards against us and harm our reputation.

Legislative or regulatory healthcare reforms may result in downward pressure on the price of and decrease reimbursement for our products, and uncertainty regarding the healthcare regulatory environment could have a material adverse effect on our business.*

The sales of our products depend in part on the availability of coverage and reimbursement from third-party payors such as government health administration authorities, private health insurers, health maintenance organizations and other healthcare-related organizations. Both the federal and state governments in the United States continue to propose and pass new legislation and regulations designed to, among other things, expand healthcare coverage to more individuals, contain or reduce the cost of healthcare, and improve the quality of healthcare outcomes. This legislation and regulation may result in decreased reimbursement for medical devices, which may create additional pressure to reduce the prices charged for medical devices. Reduced reimbursement rates could significantly decrease our revenue, which in turn would place significant downward pressure on our gross margins and impede our ability to become profitable.

The PPACA substantially changed the way healthcare is financed by both governmental and private insurers, encourages improvements in the quality of healthcare items and services, and significantly impacts the medical device industry. However, a number of legislative changes have been proposed and adopted since the PPACA was enacted, and legislation has recently been proposed that could modify or repeal the PPACA. The uncertainties regarding the future of the PPACA, and other healthcare reform initiatives, may have an adverse effect on our customers’ purchasing decisions regarding our products.

In the future, additional changes could be made to governmental healthcare programs that could significantly impact the success of our products. Cost control initiatives could decrease the price that we receive for our products. At this time, we cannot predict which, if any, additional healthcare reform proposals will be adopted, when they may be adopted or what impact they may have on the existing regulatory environment, or our ability to operate our business. Any of these factors could have a material adverse effect on our operating results and financial condition.

Our financial performance may be adversely affected by medical device tax provisions in the healthcare reform laws.

~~Beginning in 2013 through the end of 2015, the~~The PPACA ~~imposed,~~imposes, among other things, an ~~annual~~ excise tax of 2.3% on any entity that manufactures or imports medical devices offered for sale in the United ~~States. Congress suspended~~States, although this tax ~~on December 18, 2015~~has been suspended for ~~two~~calendar years ~~for sales of devices during~~2016, 2017, 2018 and 2019. It is unclear at this time if the ~~period January 1, 2016 through December 31, 2017.~~moratorium will be further extended. We do not believe that our products ~~were~~are subject to this tax ~~(prior to its suspension)~~ based on the retail exemption under applicable Treasury Regulations. However, the availability of this exemption is subject to interpretation by the IRS, and the IRS may disagree with our analysis. ~~The future of~~Absent further legislative action, the medical device excise tax ~~(and the PPACA generally) is uncertain. If the tax is not repealed~~applies to sales of taxable medical devices beginning on January 1, 2020, and ~~the two-year suspension of the tax is not extended beyond 2017,~~ future products that we manufacture, produce or import may be subject to this tax (unless the retail exemption or other applicable exemption applies). The financial impact this tax may have on our business is unclear and there can be no assurance that our business will not be materially adversely affected by it. Additionally, Congress could terminate the moratorium or further change the law related to the medical device tax in a manner that could adversely affect us.

Because of their significant stock ownership, certain of our executive officers, directors and principal stockholders will be able to exert control over our company and our significant corporate decisions.*

~~Based on an aggregate of~~ ~~5,487,029~~ ~~shares~~The price of our common stock outstanding as of September 30, 2017, our executive officers and directors, and their affiliates owned, in the aggregate, approximately 19% of the voting power of our outstanding common stock. These persons, acting together, will have the abilitymay continue to significantly influence the outcome of all matters submitted to our stockholders for approval, including the election and removal of directors and any merger, consolidation, or sale of all or substantially all of our assets.fluctuate significantly.

The ~~interests of the aforementioned stockholders might not coincide with the interests of the other holders of our capital stock. This concentration of ownership may reduce the value~~trading price of our common stock ~~by, among other things:~~has been volatile over the past several years. We believe our stock price has been, and will continue to be, subject to wide fluctuations in response to a variety of factors, including the following:

Anti-takeover provisions in our organizational documents and Delaware law may discourage or prevent a change of control, even if an acquisition would be beneficial to our stockholders, which could reduce our stock price and prevent our stockholders from replacing or removing our current management.

Our amended and restated certificate of incorporation and bylaws contain provisions that could delay or prevent a change of control of our company or changes in our board of directors that our stockholders might consider favorable. Some of these provisions:

We are subject to the provisions of Section 203 of the Delaware General Corporation Law, which may prohibit certain business combinations with stockholders owning 15% or more of our outstanding voting stock. These and other provisions in our amended and restated certificate of incorporation, bylaws and Delaware law could make it more difficult for stockholders or potential acquirers to obtain control of our board of directors or initiate actions that are opposed by our then-current board of directors, including a merger, tender offer or proxy contest involving our company. Any delay or prevention of a change of control transaction or changes in our board of directors could cause the market price of our common stock to decline.

Our board of directors is authorized to issue and designate shares of our preferred stock in additional series without stockholder approval.

Our amended and restated certificate of incorporation authorizes our board of directors, without the approval of our stockholders, to issue 5,000,000 shares of our preferred stock, subject to limitations prescribed by applicable law, rules and regulations and the provisions of our amended and restated certificate of incorporation, as shares of preferred stock in series, and to establish from time to time the number of shares to be included in each such series, and to fix the designation, powers, preferences and rights of the shares of each such series and the qualifications, limitations or restrictions thereof. The powers, preferences and rights of these additional series of preferred stock may be senior to or on parity with our common stock, and the issuance of such shares in the future may reduce the value of our common stock.

On December 22, 2017, President Trump signed into law the Tax Cuts and Jobs Act, or the TCJA, which significantly reforms the Internal Revenue Code of 1986, as amended, or the Code. The TCJA, among other things, includes changes to U.S. federal tax rates, imposes significant additional limitations on the deductibility of interest, allows for the expensing of capital expenditures, and puts into effect the migration from a “worldwide” system of taxation to a territorial system. We do not expect tax reform to have a material impact on our projection of minimal cash taxes. Our net deferred tax assets and liabilities were revalued at the newly-enacted U.S. corporate rate, and the impact was recognized in our tax expense, offset by a full valuation allowance, in the year of enactment. We continue to examine the impact that this tax reform legislation may have on our business. The impact of this tax reform on holders of our common stock is uncertain and could be adverse.

Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.*

As of December 31, ~~2016,~~2017, we had federal net operating loss, or NOL, carryforwards of approximately ~~$283.5~~$335.3 million, not considering the limitation discussed below. The federal tax loss carryforwards begin to expire in 2026, unless previously utilized. In general, if there is an “ownership change” with respect to our company, as defined under Section 382 of the Internal Revenue Code of 1986, as amended, or the Code, the utilization of our NOL carryforwards may be subject to substantial limitations imposed by the Code, and similar state provisions. In general, an ownership change occurs whenever there is a shift in ownership of our company by more than 50% by one or more 5% stockholders over a specified time period.

Although we have not completed an update of our Section 382 analysis subsequent to December 31, ~~2016,~~2017, the ~~offering that we conducted in March~~recent offerings of ~~2017, either separately or together, with any future equity financing,~~our securities, may have caused or could cause an ownership change or could increase the likelihood that we undergo an ownership change for purposes of Section 382 of the Code in the future. Limitations imposed on our ability to utilize NOL carryforwards could cause U.S. federal income taxes to be paid earlier than would be paid if such limitations were not in effect and could cause such NOL carryforwards to expire unused, in each case reducing or eliminating the benefit of such NOL carryforwards.

With respect to our NOLs generated in 2018 and thereafter, the TCJA may reduce the tax benefit of our NOLs. Under the TCJA, our ability to carry back NOLs incurred after December 31, 2017 to previous tax years is eliminated. Under prior law, we could carry back NOLs for two years and carry forward NOLs for 20 years. Under the TCJA, NOL carryforwards may be carried forward indefinitely. However, for NOLs arising after December 31, 2017, NOL carryforwards will be limited to 80% of our taxable income. Our NOLs generated in 2017 and in prior years will not be subject to the limitations under the TCJA.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all available funds and any future earnings for use in the operation and expansion of our business and do not anticipate paying any cash dividends in the foreseeable future. ~~In addition, pursuant to our Term Loan Agreement with Capital Royalty Partners, we are precluded from paying any cash dividends.~~ Accordingly, ~~you~~investors may have to sell some or all of ~~your~~their shares of our common stock in order to generate cash flow from ~~your~~their investment. ~~You may not receive a gain on your investment when you sell their shares of our common stock and may lose the entire amount of your investment.~~

The requirements of being a public company have increased our costs and will continue to strain our resources and divert management’s attention.

As a public company, we are subject to the reporting requirements of the Exchange Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act, or the Dodd-Frank Act, the listing requirements of the NASDAQ Global Market and other applicable securities rules and regulations. Compliance with these rules and regulations has increased our legal and financial compliance costs, made some activities more difficult, time-consuming or costly, and increased demand on our systems and resources.

The Sarbanes-Oxley Act of 2002, or the Sarbanes-Oxley Act, requires, among other things, that we maintain effective disclosure controls and procedures and internal control over financial reporting. Recent legislation permits “emerging growth companies” to implement many of these requirements over a period of up to five years after becoming subject to the requirements. ~~We intend to take advantage of this new legislation but cannot guarantee that~~However, we expect we will ~~not be required~~cease to ~~implement these requirements sooner than budgeted or planned~~qualify as an “emerging growth company” on December 31, 2018, at which point we will become subject to the additional compliance and ~~thereby incur unexpected expenses.~~

reporting requirements. In order to ~~maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to~~ meet ~~this standard,~~these additional requirements, significant resources and management oversight may be required. As a result, management’s attention may be diverted from other business concerns, which could harm our business and operating results. Although we have hired additional employees to help us comply with these requirements, in the future we may need to hire more employees or utilize external consultants in order to further support our efforts, which will increase our expenses.

Regulations related to ~~"conflict minerals"~~“conflict minerals” may cause us to incur additional expenses and could limit the supply and increase the cost of certain metals used in manufacturing our products.

The SEC adopted a rule requiring disclosures by public companies of specified minerals, known as conflict minerals, that are necessary to the functionality or production of products manufactured or contracted to be manufactured. The rule requires companies to perform due diligence, disclose and annually report to the SEC whether or not such minerals originate from the Democratic Republic of Congo or an adjoining country. The rule could affect sourcing at competitive prices and availability in sufficient quantities of certain minerals used in the manufacture of our products, ~~including tantalum, tin, gold and tungsten. The number of suppliers who provide conflict-free minerals may be limited.~~which could increase our expenses. In addition, there may be material costs associated with complying with the disclosure requirements, such as costs related to determining the source of certain minerals used in our products, as well as costs of possible changes to products, processes, or sources of supply as a consequence of such verification activities. Within our supply chain, we may not be able to sufficiently verify the origins of the relevant minerals used in our products through the due diligence procedures that we implement, which may harm our reputation. We continue to investigate the use of conflict materials, if any, within our supply chain.

We are an “emerging growth company” and we do not know whether the reduced disclosure requirements and relief from certain other significant obligations that are applicable to emerging growth companies will make our common stock less attractive to investors.

We are an “emerging growth company,” as defined in the Jumpstart our Business Startups Act of 2012, or the JOBS Act, and we have taken advantage of, and intend to continue to take advantage of certain exemptions from various reporting and compliance requirements that apply to other public companies that are not “emerging growth companies.” These exemptions include the following:

~~We intend to take advantage of these exemptions but cannot guarantee that we will not be required to implement these requirements sooner than budgeted or planned and thereby incur unexpected expenses.~~ We cannot predict if investors will find our common stock less attractive because of our reliance on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock, which could result in a reduction in the price of our common ~~stock.~~stock or cause our stock price to be more volatile. We expect we will cease to qualify as an “emerging growth company” on December 31, 2018.

We are a “smaller reporting company” and, as a result of the reduced disclosure and governance requirements applicable to smaller reporting companies, our common stock may be less attractive to investors.*

We are a “smaller reporting company” under applicable SEC rules and regulations. Similar to an “emerging growth company”, a “smaller reporting company” is subject to scaled reporting and compliance obligations as compared to other public companies. Specifically, “smaller reporting companies” are able to provide simplified executive compensation disclosures in their filings, are exempt from the auditor attestation requirements of Section 404(b) of the Sarbanes-Oxley Act, and have certain other reduced disclosure obligations in their SEC filings. Reduced disclosures in our SEC filings due to our status as a “smaller reporting company” may make it harder for investors to analyze our financial condition, operating results and prospects. If investors find our common stock less attractive as a result of our reduced disclosures, there may be a less active trading market for our common stock and our stock price may decline or be more volatile. In light of the increase in our stock price during 2018, we expect to cease to qualify as a “smaller reporting company” once our status is reassessed under applicable SEC rules.

If we fail to maintain an effective system of internal control over financial reporting, we may not be able to accurately report our financial results or prevent fraud. As a result, stockholders could lose confidence in our financial and other public reporting, which would harm our business and the trading price of our common stock.

Effective internal controls over financial reporting are necessary for us to provide reliable financial reports and, together with adequate disclosure controls and procedures, are designed to prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting obligations. In addition, any testing by us conducted in connection with Section 404(a) of the Sarbanes-Oxley Act, or the subsequent testing by our independent registered public accounting firm conducted in connection with Section 404(b) of the Sarbanes-Oxley Act after we no longer qualify as an “emerging growth company” or a “smaller reporting company,” may reveal deficiencies in our internal controls over financial reporting that are deemed to be material weaknesses or that may require prospective or retroactive changes to our financial statements or identify other areas for further attention or improvement. Inferior internal controls could also cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of our common stock.

We are required to disclose changes made to our internal control procedures on a quarterly basis and our management is required to assess the effectiveness of these controls annually. However, for as long as we are an “emerging growth company” or a “smaller reporting company” under ~~the JOBS Act,~~applicable SEC rules and regulations, our independent registered public accounting firm will not be required to attest to the effectiveness of our internal control over financial reporting pursuant to Section 404. ~~We could be an “emerging growth company” for up to five years from our November 2013 initial public offering.~~ An independent assessment of the effectiveness of our internal controls could detect problems that our management’s assessment might not. Undetected material weaknesses in our internal controls could lead to financial statement restatements and require us to incur the expense of remediation.

~~The price~~We may be at increased risk of ~~our common stock might fluctuate significantly.~~securities class action litigation.*

~~Our common stock is listed for trading on~~In the ~~NASDAQ Global Market under the symbol “TNDM.” Our stock price could be subject to wide fluctuations in response to a variety of factors, including the following:~~

These and other factors might cause the market price of our common stock to fluctuate substantially, which may negatively affect the liquidity of our common stock. In addition, in recent years, the stock market has experienced significant price and volume fluctuations. This volatility has had a significant impact on the market price of securities issued by many companies across many industries. The changes frequently appear to occur without regard to the operating performance of the affected companies. Accordingly, the price of our common stock could fluctuate based upon factors that have little or nothing to do with our company, and these fluctuations could materially reduce the market price of our common stock and the value of the warrants.

~~Securities~~ class action litigation has ~~often~~ been instituted against companies following periods of volatility in the overall market and in the ~~market~~ price of a company’s securities. ~~This~~We believe this risk may be particularly relevant to us as we have recently and in past years experienced significant stock price volatility. If we face such litigation, ~~if instituted against us,~~it could result in substantial costs ~~divert our~~and a diversion of management’s attention and resources, ~~and~~which could harm our business, ~~operating~~financial condition and results of operations. Our stock price volatility and ~~financial condition.~~the increase in our market capitalization during the past year may also result in higher expenses associated with our directors’ and officers’ liability insurance program.

~~Future sales,~~If securities or industry analysts do not publish research, or publish inaccurate or unfavorable research, about our business, our stock price and trading volume could decline.

The trading market for our common stock depends, in part, on the ~~perception~~research and reports that securities or industry analysts publish about us or our business. If one or more of ~~future sales,~~the analysts who cover us downgrade our stock or publish inaccurate or unfavorable research about our business, our stock price would likely decline. In addition, if our operating results fail to meet the forecasts of ~~shares~~analysts, our stock price would likely decline. If one or more of these analysts cease coverage of our company or fail to publish reports on us regularly, demand for our common stock could materially reduce the market price of our common stock.*

~~Sales of our common stock, or the perception in the market that the holders of a large number of our shares intend to sell such shares, could reduce the market price of our common stock,~~decrease, which would impair our ability to raise future capital through the sale of additional equity securities. A substantial number of the outstanding shares of our common stock are freely tradable without restriction or further registration under the Securities Act. After taking in consideration the impact of a 1-for-10 reverse stock split that we effected on October 9, 2017, we had outstanding ~~10,118,659~~ shares of common stock as of October 23, 2017, of which approximately 1,322,789 shares are restricted securities that may be sold only in accordance with the resale restrictions under Rule 144 of the Securities Act. In addition, as of October 23, 2017, we had outstanding options to purchase 933,953 shares of common stock and warrants to purchase 9,552,753 shares of common stock that, if exercised, will result in these additional shares becoming available for sale. As of October 23, 2017, there were also 37,536 shares of our common stock reserved for future grant or issuance under our 2013 Stock Incentive Plan.

Certain holders of shares of common stock have the right, subject to various conditions and limitations, to include their shares in registration statements relating to our securities. In addition, these holders are entitled to piggyback registration rights with respect to the registration under the Securities Act of shares of our common stock. Shares of common stock registered under these registration statements can be freely sold in the public market. In the event registration rights are exercised and a large number of shares of common stock are sold in the public market, those sales could reduce the trading price of our common stock.

In the future, we may issue additional securities if we need to raise more capital. In particular, management currently believes that it will be necessary for us to raise additional funding. For example, we previously announced an up to $15 million “at-the-market” public offering of shares of our common stock. In the three months ended September 30, 2017, we had sold approximately $4.3 million of shares of common stock pursuant to our ATM offering and, accordingly, we may sell up to an additional of approximately $10.7 million shares of common stock in our ATM offering, subject to contractual limitations. The number of new shares of our common stock issued in connection with raising additional capital could constitute a material portion of the then-outstanding shares of our common stock.

There is no public market for the warrants to purchase shares of our common stock.*

~~There~~ is no established public trading market for the outstanding warrants to purchase common stock , and we do not expect a market to develop. In addition, we do not intend to apply for the listing of the warrants on any national securities exchange or other trading market. Without an active market, we expect the liquidity of the warrants will be limited.

Holders of our warrants will generally not have rights as a common stockholder until such holders exercise their warrants and acquire our common stock.*

Except as set forth in the warrants, holders of warrants acquire shares of our common stock upon exercise of the warrants, holders of warrants will generally not have rights with respect to the shares of our common stock underlying such warrants. Upon exercise of the warrants, the holders thereof will be entitled to exercise the rights of a common stockholder only as to matters for which the record date occurs after the exercise date.

Due to the speculative nature of warrants, there is no guarantee that it will ever be profitable for investors in the offering to exercise their warrants.*

Investors in the October Financing may exercise their right to acquire the shares of common stock underlying their Series A warrants at any time after the date of issuance by paying an exercise price of $3.50 per share, prior to their expiration on the date that is five years from the date of issuance, after which date any unexercised Series A warrants will expire and have no further value. Investors in the October Financing may exercise their right to acquire the shares of common stock underlying their Series B warrants at any time after the date of issuance by paying an exercise price of $3.50 per share, prior to their expiration on the date that is six months from the date of issuance, after which date any unexercised Series B warrants will expire and have no further value. There can be no assurance that the market price of our common stock will ever equal or exceed the exercise price of the warrants, and, consequently, whether it will ever be profitable for investors to exercise their warrants.

Significant holders or beneficial holders of our common stock may not be permitted to exercise warrants that they hold.*

~~The terms~~ of our Series A warrants and Series B warrants offered in the October Financing prohibit a holder from exercising its warrants if doing so would result in such holder (together with such holder's affiliates) beneficially owning more than 4.99% (which threshold may be decreased or increased, but not above 9.99%, at the election of the holder upon prior written notice to us) of the number of shares of common stock outstanding immediately after giving effect to the exercise, as such percentage ownership is determined in accordance with the terms of the warrants. As a result, a warrant holder may not be able to exercise the warrants for shares of our common stock at a time when it would be financially beneficial for a warrant holder to do so. In such circumstance, a warrant holder could seek to sell the warrants to realize value, but may be unable to do so.

If we are unable to comply with certain continued listing requirements of NASDAQ, our common stock would be delisted from NASDAQ.*

Our common stock is currently listed on NASDAQ. In order to maintain this listing, we must satisfy minimum continued listing requirements and standards, including a minimum closing bid price requirement for our common stock. On June 14, 2017, we received notice that we had failed to meet minimum closing bid price requirement of $1.00 per share for 30 consecutive business days, which could subject our common stock to delisting. On October 24, 2017, we received notice from NASDAQ that for the 10 consecutive business days, from October 10, 2017 to October 23, 2017, our closing bid price for our common stock had been at least $1.00 per share or greater. Accordingly, we regained compliance under the NASDAQ minimum continued listing requirements. However, due to the volatility ofmight cause our stock price ~~we cannot assure you that we will continue~~and trading volume to ~~satisfy the NASDAQ continued listing requirements.~~

~~Our executive officers and directors may sell their shares of our common stock, and these sales could adversely affect our stock price.~~

Sales of our common stock by our executive officers and directors, or the perception that such sales may occur, could adversely affect the market price of our common stock. Our executive officers and directors may sell our common stock in the future as part of pre-arranged trading plans or otherwise.

Our recently implemented reverse stock split may decrease the liquidity of our common stock and result in higher transaction costs.*

~~The liquidity of our common stock may be negatively impacted by our implementation of~~ ~~a 1-for-10~~ reverse stock split on October 9, 2017, given the significantly reduced number of shares that are now issued and outstanding after the reverse stock split, and because our stock price did not increase commensurate with the ratio of the reverse stock split. In addition, as a result of our reverse stock split, we now have a greater number of stockholders who own “odd lots” of fewer than 100 shares of our common stock. Brokerage commission and other costs of transactions for the sale of odd lots are generally higher than the costs of transactions of more than 100 shares of common stock. Accordingly, a reverse stock split may not achieve the desired results of increasing marketability and liquidity of our common stock.

The effective increase in the authorized number of shares of our common stock as a result of our reverse stock split could have anti-takeover implications and result in further dilution to our existing stockholders.*

In connection with the recent implementation of the reverse stock split, we maintained the total number of authorized shares of our common stock. The combination of a reverse stock split of our issued and outstanding shares, and maintaining the number of our authorized shares, has significantly increased our authorized shares relative to our issued and outstanding shares. This effective increase in the number of authorized shares will allow us to sell additional shares of our common stock (or securities convertible or exchangeable for our common stock), which would result in further dilution of our current stockholders. In addition, the effective increase in the number of authorized shares could, under certain circumstances, have anti-takeover implications. For example, the additional shares of common stock that have become available for issuance could be used by us to oppose a hostile takeover attempt or to delay or prevent changes in control or our management. Although our reverse stock split was prompted by business and financial considerations and not by the threat of any hostile takeover attempt, stockholders should be aware that our reverse stock split could facilitate future efforts by us to deter or prevent changes in control, including transactions in which our stockholders might otherwise receive a premium for their shares over then-current market prices.decline.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Delaware		20-4327508
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

~~11045~~11075 Roselle Street San Diego, California		92121
(Address of principal executive offices)		(Zip Code)

Title of Each Class		Name of Exchange on Which Registered
Common Stock, par value $0.001 per share		The NASDAQ Stock Market LLC

Large accelerated filer	☐	Accelerated filer		☒
			☐
Non-accelerated filer	☐ ~~(Do not check if a smaller reporting company)~~	Smaller reporting company		☐☒
		Emerging growth company		☒

Part I	Financial Information	1
Item 1	Financial Statements	1
	Condensed Consolidated Balance Sheets at September 30, ~~2017~~2018 (Unaudited) and December 31, ~~2016~~2017	1
	Condensed Consolidated Statements of Operations and Comprehensive Loss for the Three and Nine Months Ended September 30, ~~2017~~2018 and ~~2016~~2017 (Unaudited)	2
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, ~~2017~~2018 and ~~2016~~2017 (Unaudited)	3
	Notes to Unaudited Condensed Consolidated Financial Statements	4
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	15
Item 3	Quantitative and Qualitative Disclosures about Market Risk	2927
Item 4	Controls and Procedures	3028

Part II	Other Information	3129
Item 1	Legal Proceedings	3129
Item 1A	Risk Factors	3129
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	6257
Item 3	Defaults Upon Senior Securities	6257
Item 4	Mine Safety Disclosures	6258
Item 5	Other Information	6258
Item 6	Exhibits	6358

Level 1:		Observable inputs such as unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

Level 2:		Inputs, other than quoted prices in active markets, that are observable either directly or indirectly for substantially the full term of the asset or liability.

Level 3:		Unobservable inputs in which there is little or no market data and that are significant to the fair value of the assets or liabilities, which require the reporting entity to develop its own valuation techniques that require input assumptions.

At September 30, 2017	Maturity (in years)	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Trading securities:
Mutual funds held for nonqualified deferred compensation plan participants		$	416	$	43	$	—	$	459
Total		$	416	$	43	$	—	$	459

	Series A Warrants
	September 30, 2018			December 31, 2017
Risk-free interest rate		2.9	%		2.2	%
Expected dividend yield		0.0	%		0.0	%
Expected volatility		77.6	%		63.5	%
Expected term (in years)		4.1			4.8

	Series B Warrants
	September 30, 2018⁽¹⁾	December 31, 2017
Risk-free interest rate	N/A		1.4	%
Expected dividend yield	N/A		0.0	%
Expected volatility	N/A		80.3	%
Expected term (in years)	N/A		0.3

Balance at December 31, 2017	$	5,432
Increase in fair value included in change in fair value of common stock warrants		69,042
Decrease in fair value from warrants exercised during the period		(53,831	)
Balance at September 30, 2018	$	20,643

Shares underlying outstanding warrants		~~293~~809
Shares underlying outstanding stock options		~~933~~5,655
Shares authorized for future equity award grants		391,189
Shares authorized for issuance as ESPP awards		—2,101
		~~1,265~~9,754

	Tandem Diabetes Care, Inc.

Dated: ~~October 26, 2017~~November 1, 2018	By:	/s/ Kim D. Blickenstaff
		Kim D. Blickenstaff
		President, Chief Executive Officer and Director (on behalf of the registrant and as the registrant’s Principal Executive Officer)

	By:	/s/ ~~John Cajigas~~Leigh A. Vosseller
		~~John Cajigas~~Leigh A. Vosseller
		Executive Vice President, Chief Financial Officer and Treasurer (on behalf of the registrant and as the registrant’s Principal Financial and Accounting Officer)