(Former name, former address and former fiscal year, if changed since last report)

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~~Yes ☒ NoNo ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted 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 such files). ~~Yes~~Yes ☒ NoNo ☐

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 the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):

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~~ Yes☐ No No ☒

As of ~~August 2,~~November 1, 2021, there were ~~12,560,642~~15,055,040 shares of the Registrant’s Common Stock outstanding.

This Quarterly Report on Form 10-Q (Quarterly Report) contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (Exchange Act), and section 27A of the Securities Act of 1933, as amended (Securities Act). All statements contained in this Quarterly Report other than statements of historical fact are “forward-looking statements” for purposes of this Quarterly Report on Form 10-Q. These forward-looking statements may include, but are not limited to, statements regarding our current and future nonclinical and clinical development activities, anticipated impacts of the COVID-19 pandemic, efficacy and safety profile of our product candidates, expected timing and results of clinical trials, expected timing of the execution of, and expected results from, strategic options, collaborations with third parties, the receipt and timing of potential regulatory designations, approvals and commercialization of product candidates, future results of operations and financial position, business strategy and plans, market size, potential growth opportunities and our objectives for future operations. The words “believe,” “may,” “will,” “potentially,” “estimate,” “continue,” “anticipate,” “intend,” “could,” “would,” “project,” “plan” “expect,” and similar expressions that convey uncertainty of future events or outcomes are intended to identify forward-looking statements.

We have based these forward-looking statements largely on our current expectations and projections about future events and trends that we believe may affect our financial condition, results of operations, business strategy, short-term and long-term business operations and objectives and financial needs. These forward-looking statements are subject to a number of risks, uncertainties and assumptions, including those described in the “Risk Factors” section and elsewhere in this Quarterly Report on Form 10-Q. Moreover, we operate in a very competitive and rapidly changing environment, and new risks emerge from time to time. It is not possible for our management to predict all risks, 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 we may make. In light of these risks, uncertainties and assumptions, the forward-looking events and circumstances discussed in this report may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements.

You should not rely upon forward-looking statements as predictions of future events. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee that the future results, levels of activity, performance or events and circumstances reflected in the forward-looking statements will be achieved or occur. We undertake no obligation to update publicly any forward-looking statements to conform these statements to actual results or to changes in our expectations, except as required by law. You should read this Quarterly Report with the understanding that our actual future results, levels of activity, performance and events and circumstances may be materially different from what we expect.

As used in this Quarterly Report on Form 10-Q, the terms “Sierra Oncology,” “the Company,” “we,” “us” and “our” refer to Sierra Oncology, Inc., a Delaware corporation, and its subsidiaries taken as a whole, unless otherwise noted. Sierra Oncology is our registered trademark. The “Sierra Oncology” logo and all product names are our common law trademarks. This Quarterly Report may contain additional trade names, trademarks and service marks of other companies, which are the property of their respective owners. We do not intend our use or display of other companies’ trade names, trademarks or service marks to imply a relationship with, or endorsement or sponsorship of us by, these other companies.

	June 30, 2021			December 31, 2020			September 30, 2021			December 31, 2020
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	90,690		$	104,055		$	97,068		$	104,055
Prepaid expenses and other current assets		1,983			2,415			5,647			2,415
Total current assets		92,673			106,470			102,715			106,470
Property and equipment, net		71			52			88			52
Operating lease right-of-use assets		946			318			867			318
Other assets		687			647			557			647
TOTAL ASSETS	$	94,377		$	107,487		$	104,227		$	107,487
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accrued and other liabilities	$	7,913		$	7,148		$	7,781		$	7,148
Accounts payable		1,548			2,205			846			2,205
Total current liabilities		9,461			9,353			8,627			9,353
Operating lease liabilities		650			175			543			175
TOTAL LIABILITIES		10,111			9,528			9,170			9,528
Commitments and Contingencies (Note 7)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.001 par value; 10,000,000 shares authorized as of June 30, 2021 and December 31, 2020; nil shares issued and outstanding as of June 30, 2021 and December 31, 2020		—			—
Common stock, $0.001 par value; 500,000,000 shares authorized as of June 30, 2021 and December 31, 2020; 12,358,517 and 11,128,484 shares issued and outstanding as of June 30, 2021 and December 31, 2020		12			11
Preferred stock, $0.001 par value; 10,000,000 shares authorized as of September 30, 2021 and December 31, 2020; nil shares issued and outstanding as of September 30, 2021 and December 31, 2020								—			—
Common stock, $0.001 par value; 500,000,000 shares authorized as of September 30, 2021 and December 31, 2020; 14,498,953 and 11,128,484 shares issued and outstanding as of September 30, 2021 and December 31, 2020								14			11
Additional paid-in capital		971,388			944,537			1,010,824			944,537
Accumulated deficit		(887,134	)		(846,589	)		(915,781	)		(846,589	)
TOTAL STOCKHOLDERS’ EQUITY		84,266			97,959			95,057			97,959
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	94,377		$	107,487		$	104,227		$	107,487

The accompanying notes are an integral part of these condensed consolidated financial statements.

	Three Months Ended June 30,						Six Months Ended June 30,						Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020			2021			2020			2021			2020
Collaboration revenue													$	-		$	100		$	-		$	100
Operating expenses:
Research and development	$	14,149		$	10,189			28,102			21,780			21,618			10,432			49,720			32,212
General and administrative		6,424			6,260			12,289			10,804			6,985			4,112			19,274			14,916
Total operating expenses		20,573			16,449			40,391			32,584			28,603			14,544			68,994			47,128
Loss from operations		(20,573	)		(16,449	)		(40,391	)		(32,584	)		(28,603	)		(14,444	)		(68,994	)		(47,028	)
Other expense (income), net:
Changes in fair value of warrant liabilities		—			—			—			16,240			—			—			—			16,240
Other expense (income), net		48			24			77			(517	)		(3	)		22			74			(495	)
Total other expense (income), net		48			24			77			15,723			(3	)		22			74			15,745
Loss before provision for (benefit from) income taxes, net		(20,621	)		(16,473	)		(40,468	)		(48,307	)
Provision for (benefit from) income taxes, net		9			(11	)		77			67
Loss before provision for income taxes, net														(28,600	)		(14,466	)		(69,068	)		(62,773	)
Provision for income taxes, net														47			39			124			106
Net loss and comprehensive loss	$	(20,630	)	$	(16,462	)	$	(40,545	)	$	(48,374	)		(28,647	)	$	(14,505	)	$	(69,192	)	$	(62,879	)
Net loss per common share, basic and diluted	$	(1.67	)	$	(1.58	)	$	(3.38	)	$	(4.71	)	$	(2.10	)	$	(1.39	)	$	(5.50	)	$	(6.09	)
Weighted-average shares used in computing net loss per common share, basic and diluted		12,350,660			10,395,732			12,011,199			10,276,180			13,672,633			10,441,384			12,571,096			10,331,650

The accompanying notes are an integral part of these condensed consolidated financial statements.

	Common Stock				Additional Paid-In		Accumulated			Total Stockholders’			Common Stock				Additional Paid-In		Accumulated			Total Stockholders’
	Shares		Amount		Capital		Deficit			Equity			Shares		Amount		Capital		Deficit			Equity
Balance—December 31, 2020		11,128,484	$	11	$	944,537	$	(846,589	)	$	97,959			11,128,484	$	11	$	944,537	$	(846,589	)	$	97,959
Issuance of common stock from an At-The-Market equity offering, net of offering costs		1,149,820		1		19,631		—			19,632			1,149,820		1		19,631		—			19,632
Issuance of common stock for exercise of common stock warrants		49,995		—		660		—			660			49,995		—		660		—			660
Issuance of common stock for exercise of common stock options		21,662		—		288		—			288			21,662		—		288		—			288
Stock-based compensation		—		—		2,931		—			2,931			—		—		2,931		—			2,931
Net loss		—		—		—		(19,915	)		(19,915	)		—		—		—		(19,915	)		(19,915	)
Balance—March 31, 2021		12,349,961		12		968,047		(866,504	)		101,555			12,349,961		12		968,047		(866,504	)		101,555
Issuance of common stock for exercise of common stock options		8,556		—		113		—			113			8,556		—		113		—			113
Stock-based compensation		—		—		3,228		—			3,228			—		—		3,228		—			3,228
Net loss		—		—		—		(20,630	)		(20,630	)		—		—		—		(20,630	)		(20,630	)
Balance—June 30, 2021		12,358,517	$	12	$	971,388	$	(887,134	)	$	84,266			12,358,517		12		971,388		(887,134	)		84,266
Issuance of common stock from an At-The-Market equity offering, net of offering costs														2,107,465		2		35,730		—			35,732
Issuance of common stock for exercise of common stock warrants														11,362		—		150		—			150
Issuance of common stock for exercise of common stock options														21,609		—		276		—			276
Stock-based compensation														—		—		3,280		—			3,280
Net loss														—		—		—		(28,647	)		(28,647	)
Balance—September 30, 2021														14,498,953	$	14	$	1,010,824	$	(915,781	)	$	95,057

	Series A Convertible Voting Preferred Stock						Common Stock					Additional Paid-In			Accumulated			Total Stockholders’			Series A Convertible Voting Preferred Stock						Common Stock					Additional Paid-In			Accumulated			Total Stockholders’
	Shares			Amount			Shares		Amount			Capital			Deficit			Equity			Shares			Amount			Shares		Amount			Capital			Deficit			Equity
Balance—December 31, 2019		103,000		$	1			1,867,176	$	74		$	851,957		$	(765,687	)	$	86,345			103,000		$	1			1,867,176	$	74		$	851,957		$	(765,687	)	$	86,345
Conversion of Series A convertible voting preferred stock to common stock		(103,000	)		(1	)		7,803,273		8			(7	)		—			—			(103,000	)		(1	)		7,803,273		8			(7	)		—			—
Reclassification of warrant liabilities to equity		—			—			—		—			62,175			—			62,175			—			—			—		—			62,175			—			62,175
Issuance of common stock in connection with an amendment to the asset purchase agreement		—			—			725,283		1			8,781			—			8,782			—			—			725,283		1			8,781			—			8,782
Issuance of warrant in connection with an amendment to the asset purchase agreement		—			—			—		—			3,188			—			3,188			—			—			—		—			3,188			—			3,188
Stock-based compensation		—			—			—		—			918			—			918			—			—			—		—			918			—			918
Reverse stock split adjustment		—			—			—		(73	)		73			—			—			—			—			—		(73	)		73			—			—
Net loss		—			—			—		—			—			(31,912	)		(31,912	)		—			—			—		—			—			(31,912	)		(31,912	)
Balance—March 31, 2020		—			—			10,395,732		10			927,085			(797,599	)		129,496			—			—			10,395,732		10			927,085			(797,599	)		129,496
Stock-based compensation		—			—			—		—			3,617			—			3,617			—			—			—		—			3,617			—			3,617
Net loss		—			—			—		—			—			(16,462	)		(16,462	)		—			—			—		—			—			(16,462	)		(16,462	)
Balance—June 30, 2020		—		$	—			10,395,732	$	10		$	930,702		$	(814,061	)	$	116,651			—			—			10,395,732		10			930,702			(814,061	)		116,651
Stock-based compensation																												—		—			2,074			—			2,074
Issuance of common stock from an At-The-Market equity offering, net of offering costs																						—			—			100,000		—			1,140			—			1,140
Net loss																												—		—			—			(14,505	)		(14,505	)
Balance—September 30, 2020																						—		$	—			10,495,732	$	10		$	933,916		$	(828,566	)	$	105,360

The accompanying notes are an integral part of these condensed consolidated financial statements.

	Six Months Ended June 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$	(40,545	)	$	(48,374	)	$	(69,192	)	$	(62,879	)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation		6,159			4,535			9,439			6,609
Depreciation and amortization		123			113			213			191
Changes in fair value of warrant liabilities		—			16,240			—			16,240
Securities issuance obligation		—			1,485			—			1,485
Asset impairment								—			106
Other		21			74			78			108
Changes in operating assets and liabilities:
Prepaid expenses and other assets		310			972			(3,263	)		(586	)
Accounts payable								(1,358	)		531
Accrued, other and operating lease liabilities		623			(546	)		369			(1,624	)
Accounts payable		(657	)		976
Deferred revenue		—			300			—			200
Net cash used in operating activities		(33,966	)		(24,225	)		(63,714	)		(39,619	)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment		(40	)		(12	)		(40	)		(12	)
Net cash used in investing activities		(40	)		(12	)		(40	)		(12	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock from At-The-Market equity offering, net of offering costs		19,632			—			55,364			1,140
Proceeds from exercise of common stock warrants		660			—			810			—
Proceeds from exercise of common stock options		401			—			677			—
Net cash provided by financing activities		20,693			—			56,851			1,140
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash		(52	)		(58	)		(84	)		(23	)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(13,365	)		(24,295	)		(6,987	)		(38,514	)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — Beginning of period		104,355			147,828			104,355			147,828
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — End of period	$	90,990		$	123,533		$	97,368		$	109,314
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for income taxes, net	$	33		$	14		$	51		$	17
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION:
Right-of-use asset obtained in exchange for operating lease obligation	$	730		$	—		$	730		$	—
Unpaid deferred financing costs in accrued and other liabilities	$	100		$	15		$	7		$	94
Issuance of common stock and common stock warrant in connection with an amendment to the asset purchase agreement	$	—		$	11,970		$	—		$	11,970
Reclassification of warrant liabilities to equity	$	—		$	62,175		$	—		$	62,175

The accompanying notes are an integral part of these condensed consolidated financial statements.

Sierra Oncology, Inc. (together with its subsidiaries, collectively referred to as the “Company”), a Delaware corporation, is a ~~late stage~~late-stage biopharmaceutical company focused on the Phase 3 execution, registration and potential commercialization of momelotinib, a novel drug that may address serious unmet needs in myelofibrosis. Momelotinib is a selective and orally bioavailable JAK1 (Janus kinase 1), JAK2 (Janus kinase 2) and ACVR1 (Activin A receptor type 1) / activin receptor-like kinase-2 (ALK2) inhibitor with a differentiated mechanism of action that enables it to potentially address all three key drivers of myelofibrosis: anemia of inflammation, constitutional symptoms and enlarged spleen. More than 1,200 subjects have received momelotinib since clinical studies began in 2009, including more than 800 patients treated for myelofibrosis. Several of these patients remain on treatment for more than 11 years.

In August 2021, the Company acquired an exclusive global license from AstraZeneca AB (AstraZeneca) for ~~AZD5153,~~SRA515 (formerly AZD5153), a potent and selective bromodomain-containing protein 4 (BRD4) bromodomain and extraterminal (BET) inhibitor with a novel bivalent binding mode (See Note 7).

The Company’s portfolio also includes SRA737, a selective, orally bioavailable small molecule inhibitor of Checkpoint kinase 1 (Chk1), an emerging target for the treatment of cancer which has a key role in the DNA Damage Response (DDR). The Company is currently focusing its resources on the development of momelotinib and exploring options to support potential future continued development of SRA737.

The Company’s primary activities since inception have been conducting research and development activities, conducting preclinical and clinical testing, recruiting personnel, performing business and financial planning, identifying and evaluating additional drug candidates for potential in-licensing or acquisition, and raising capital to support development activities.

The accompanying condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles applicable to a going concern, which contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business.

The Company has not generated any product revenue related to its primary business purpose to date, nor has it generated any net income, and is subject to a number of risks and uncertainties, which include dependence on key individuals, the need to identify and successfully develop commercially viable products, the need to obtain regulatory approval for its products and commercialize them, and the need to obtain adequate additional financing to fund the development of its product candidates.

As of ~~June~~September 30, 2021, the Company had ~~$90.7~~$97.1 million of cash and cash equivalents. Given the Company’s projected operating requirements and its existing cash and cash equivalents, the Company is projecting insufficient liquidity to fund its operations through the next twelve months beyond the date of the issuance of these condensed consolidated financial statements. This condition raises substantial doubt about the Company’s ability to continue as a going concern.

In response to this condition, management intends to seek additional funds through equity or debt financings, collaborations, licensing transactions or other sources. However, there can be no assurance that the Company will be able to complete any such transaction on acceptable terms or otherwise. Because management’s plans have not yet been finalized and are not within the Company’s control, the implementation of such plans cannot be considered probable. As a result, the Company has concluded that management’s plans do not alleviate substantial doubt about the Company’s ability to continue as a going concern.

The condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and applicable rules and regulations of the Securities and Exchange Commission regarding interim financial reporting. Accordingly, they do not include all the information and notes required for complete financial statements and should be read in conjunction with the Company’s audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on March 11, 2021. There were no significant changes to the accounting policies during the ~~six~~nine months ended ~~June~~September 30, 2021 from the significant accounting policies described in Note 2 to the consolidated financial statements in the 2020 Form 10-K. The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation.

These unaudited condensed consolidated financial statements and related disclosure have been prepared on the same basis as the annual consolidated financial statements and reflect, in the opinion of management, all adjustments of a normal and recurring nature that are necessary for the fair presentation of the Company’s condensed consolidated financial statements included in this report. The condensed consolidated results of operations for the ~~six~~nine months ended ~~June~~September 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021, or for any other future annual or interim period. The condensed consolidated balance sheet as of December 31, 2020 included herein was derived from the audited consolidated financial statements as of that date.

The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of expense during the reporting period. Significant estimates and assumptions made in the accompanying condensed consolidated financial statements include, but are not limited to the fair value of stock options and the warrant issued, the fair value of the securities issuance obligation, the probability of achieving performance-based milestones of stock options, accruals such as research and development costs, and recoverability of the Company’s net deferred tax assets and related valuation allowance. The Company evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors and adjusts those estimates and assumptions when facts and circumstances dictate. Actual results could materially differ from those estimates.

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common stock outstanding during the period without consideration for common stock equivalents. Diluted net loss per share is computed by dividing net loss by the weighted-average number of common stock equivalents outstanding for the period determined using the treasury-stock method. For purposes of this calculation, stock options and warrants for common stock are considered to be common stock equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive.

The following shares of common stock equivalents were excluded from the calculation of diluted net loss per share for the periods presented because including them would have been antidilutive:

	June 30, 2021		June 30, 2020		September 30, 2021		September 30, 2020
Series A warrants for common stock		7,802,241		7,802,241		7,790,879		7,802,241
Series B warrants for common stock		2,524,732		2,574,727		2,524,732		2,574,727
Options to purchase common stock		4,786,469		2,351,055		4,880,267		4,246,167
Warrants for common stock		727,122		727,122		727,122		727,122
Total potential dilutive shares		15,840,564		13,455,145		15,923,000		15,350,257

Also excluded from the calculation of diluted net loss per share are ~~200,000~~570,629 shares of common stock issued by the Company ~~in July~~subsequent to September 30, 2021 under its At-The Market (ATM) program (see Note 8).

The Company measures and reports its cash equivalents and restricted cash at fair value. The following table sets forth the fair value of the Company’s financial assets measured on a recurring basis by level within the fair value hierarchy:

	June 30, 2021								September 30, 2021
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
	(in thousands)								(in thousands)
Financial Assets
Money market funds	$	88,682	$	—	$	—	$	88,682	$	94,589	$	—	$	—	$	94,589
Restricted money market funds		300		—		—		300		300		—		—		300
Total financial assets	$	88,982	$	—	$	—	$	88,982	$	94,889	$	—	$	—	$	94,889

Money market funds and restricted money market funds are measured at fair value on a recurring basis using quoted prices and are classified as a Level 1 input. The Company’s cash and cash equivalents, restricted cash, other current assets, accounts payable and accrued and other liabilities approximate their fair values due to their short duration.

There were no transfers between Levels 1, 2 or 3 during the ~~six~~nine months ended ~~June~~September 30, 2021.

Prior to reclassification to equity in January 2020, the Company’s warrant liabilities and securities issuance obligation contained unobservable inputs that reflected the Company’s own assumptions in which there was little, if any, market activity at the measurement dates. Accordingly, the warrant liabilities and securities issuance obligation were measured at fair value on a recurring basis using unobservable inputs and were classified as Level 3 inputs. The assumptions used in calculating the estimated fair values represent the Company’s best estimate. However, inherent uncertainties are involved. If factors or assumptions change, the estimated fair values could be materially different.

At January 22, 2020, ~~Warrant~~Series A warrants and ~~Warrant~~Series B warrants were no longer considered to be derivative instruments. The Company remeasured the fair value of the warrant liabilities at the time of reclassification to equity using the following assumptions:

The Company recorded a $16.2 million non-cash expense relating to the changes in fair value of warrant liabilities in other ~~income (expense)~~expense (income), net in the accompanying condensed consolidated statement of operations for the ~~six~~nine months ended ~~June~~September 30, 2020.

On September 8, 2021, the Company amended certain terms of Series A warrants and Series B warrants (see Note 8). The amendments did not result in changes to the fair value of these warrants.

At January 31, 2020, the securities issuance obligation was settled by the issuance of common stock and a common stock warrant. The fair value of the common stock issuance obligation was remeasured based on the value of the common stock at the time of issuance. The fair value of the warrant issuance obligation was remeasured using the following assumptions:

The Company recognized a $1.5 million non-cash research and development expense during the ~~six~~nine months ended ~~June~~September 30, 2020, representing changes in fair value of the securities issuance obligation since December 31, 2019, in the condensed consolidated statement of operations.

	June 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
	(in thousands)				(in thousands)
Cash	$	2,008	$	2,136	$	2,479	$	2,136
Cash equivalents:
Money market accounts		88,682		101,919		94,589		101,919
Total cash and cash equivalents	$	90,690	$	104,055	$	97,068	$	104,055

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in the condensed consolidated balance sheets to the amounts shown in the condensed consolidated statements of cash flows.

	June 30, 2021		June 30, 2020		September 30, 2021		September 30, 2020
	(in thousands)				(in thousands)
Cash and cash equivalents	$	90,690	$	123,233	$	97,068	$	109,014
Restricted cash included in other assets		300		300		300		300
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statement of cash flows	$	90,990	$	123,533	$	97,368	$	109,314

	June 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
	(in thousands)				(in thousands)
Prepaid research and development project costs					$	2,341	$	321
Prepaid insurance						1,517		991
Prepaid software and subscription fees	$	423	$	376		695		376
Prepaid research and development project costs		396		321
Other receivables		297		311		360		311
Prepaid insurance		241		991
Other		626		416		734		416
Total prepaid expenses and other current assets	$	1,983	$	2,415	$	5,647	$	2,415

	June 30, 2021			December 31, 2020			September 30, 2021			December 31, 2020
	(in thousands)						(in thousands)
Software	$	361		$	361		$	389		$	361
Leasehold improvements		35			—			35			—
Computer equipment		5			—			5			—
Property and equipment, gross		401			361			429			361
Less: accumulated depreciation		(330	)		(309	)		(341	)		(309	)
Total property and equipment, net	$	71		$	52		$	88		$	52

Depreciation related to the Company’s property and equipment was $11,000 and ~~$21,000~~$32,000 for the three and ~~six~~nine months ended ~~June~~September 30, 2021, respectively and ~~$15,000~~$34,000 and ~~$28,000~~$0.1 million for the three and ~~six~~nine months ended ~~June~~September 30, 2020, respectively.

	June 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
	(in thousands)				(in thousands)
Accrued employee related costs					$	3,804	$	4,359
Accrued research and development costs	$	3,016	$	1,715		2,213		1,715
Accrued employee related costs		2,882		4,359
Accrued professional fees		1,576		774		1,252		774
Operating lease liabilities		356		207		408		207
Other		83		93		104		93
Total accrued and other liabilities	$	7,913	$	7,148	$	7,781	$	7,148

In December 2020, the Company entered into a 48-month operating lease agreement to lease office space in San Mateo, California. The lease commenced on April 30, 2021 and expires on April 30, 2025.

The Company also has an operating lease agreement to lease ~~the~~ office space in Vancouver, Canada that expires on February 28, 2023. In December 2020, the Company entered into an agreement to sublet the entire office premises to a third party until February 27, 2023. Pursuant to the sublease agreement, the subtenant will pay base rent of $0.2 million per annum to the Company and all operating costs related to the office space.

The components of lease expense, which are recorded in general and administrative expense, and related cash flows for the three and ~~six~~nine months ended ~~June~~September 30, 2021 and 2020 were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,				Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
	(in thousands)								(in thousands)
Operating lease cost	$	75	$	50	$	118	$	101	$	91	$	51	$	209	$	152
Short-term lease cost		6		7		13		29		7		7		20		36
		81		57		131		130		98		58		229		188
Operating cash flows used for operating leases	$	58	$	52	$	115	$	104	$	60	$	53	$	175	$	157

As of ~~June~~September 30, 2021, the weighted average remaining lease term and discount rate for the operating leases are ~~3.2~~3.1 years and ~~4.9%~~4.8%, respectively.

As of ~~June~~September 30, 2021, maturities of lease liability due under the lease agreements are as follows:

Years Ending December 31:	Operating Leases			Operating Leases
	(in thousands)			(in thousands)
Remainder of 2021	$	172		$	109
2022		402			397
2023		223			223
2024		229			230
2025		58			58
Total lease payments		1,084			1,017
Less imputed interest		(78	)		(66	)
Total	$	1,006		$	951

In addition to base rent, the Vancouver lease requires payment of operating costs. These costs are not included in the table above or the sublease amount. These amounts also have not been reduced by future base rent due under the Vancouver sublease of ~~$0.3~~$0.2 million.

In August 2018, the Company entered into an Asset Purchase Agreement with Gilead whereby the Company acquired worldwide rights to the pharmaceutical product, momelotinib, an investigational orally bioavailable JAK1, JAK2 and ACVR1/ALK2 inhibitor together with all related intellectual property rights and certain other related assets. Pursuant to the agreement, the Company made a one-time upfront payment of $3.0 million in August 2018. In October 2019, the Company entered into an amendment to the Asset Purchase Agreement in which the Company agreed to issue, subject to certain conditions, shares of common stock and a warrant to purchase common stock to Gilead in consideration for meaningfully reduced royalty rates and elimination of a near term milestone payment in the Asset Purchase Agreement. Pursuant to the amended agreement, milestone payments of up to an aggregate of $190.0 million may become payable to Gilead upon the achievement of certain regulatory and commercial milestone events, including a milestone payment of $25.0 million due upon the approval of momelotinib from theU.S. Food and Drug Administration (FDA). These milestones will be accrued once they are considered probable of occurring. In addition, the Company is now required to pay Gilead low double-digit to high-teens percent tiered combined royalties based upon net sales.

In August 2021, the Company entered into a license agreement with AstraZeneca for an exclusive global license for ~~AZD5153~~SRA515 and related compounds, which selectively inhibit BRD4. Under the agreement, the Company ~~will have~~has an exclusive license to develop, manufacture and commercialize ~~AZD5153~~SRA515 for all therapeutic, prophylactic, palliative and diagnostic uses in humans and animals. T~~The license agreement provides that the~~he Company ~~will make~~made a one-time, non-refundable upfront cash payment of $8.0 million to AstraZeneca, ~~that will be paid and~~which was expensed as research and development costs during the ~~third~~three months ended September 30, 2021. In addition, the Company will pay $0.9 million to AstraZeneca for the purchase of drug products and drug substance, which is expected to occur in the fourth quarter of 2021. Aggregate milestone payments of up to $208.0 million may become payable by the Company upon the achievement of certain development, regulatory and commercial milestones. These milestones will be accrued once they are considered probable of occurring. In addition, the Company is required to pay AstraZeneca a tiered royalty on worldwide net sales ranging from high single-digits to low double-digits.

In September 2016, the Company entered into an exclusive license agreement with CRT Pioneer Fund LP (CPF) for worldwide rights, know-how and materials to develop SRA737, a small molecule inhibitor targeting Chk1, a promising therapeutic target to treat cancer. Pursuant to the agreement, the Company made a one-time upfront payment of $7.0 million to CPF in October 2016 and paid $2.0 million to CPF in January 2017 for the successful transfer of two ongoing Phase 1 clinical trials. Pursuant to the original license agreement, additional milestone payments of up to an aggregate of $319.5 million may have become payable to CPF upon the achievement of certain milestones. In November 2020, the Company entered into an amendment to the license agreement with CPF, which amended the terms and reduced the amounts of certain future milestone payments. Pursuant to the amended agreement, future milestone payments of up to an aggregate of $290.0 million may become payable to CPF upon the achievement of certain developmental, regulatory and commercial milestones, including a milestone payment of $2.0 million upon the dosing of the first patient of the first trial of SRA737 by the Company following the effective date of the amendment. These milestones will be accrued once they are considered probable of occurring. In addition, the Company is required to pay CPF, on a product-by-product and country-by-country basis, tiered high single-digit to low double-digit royalties on the net sales of any product successfully developed.

In May 2016, the Company entered into an exclusive license agreement (Carna License Agreement) with Carna Biosciences, Inc. (Carna) for worldwide rights to develop and commercialize SRA141, a small molecule kinase inhibitor targeting Cdc7. In exchange for this exclusive right, the Company paid Carna an upfront payment of $0.9 million in June 2016. In June 2020, the Company entered into a collaboration agreement (Carna Collaboration Agreement) with Carna effectively terminating the Carna License Agreement. Pursuant to the Carna Collaboration Agreement, Carna paid an upfront fee of $0.3 million, which was recognized as collaboration revenue during the year ended December 31, 2020, for the exclusive worldwide rights for SRA141 and other transition services. In addition, the Company will be entitled to single-digit royalties on product sales, on a product-by-product basis, and low to mid-teen profit share on royalty and non-royalty income.

From time to time, the Company may become subject to other legal proceedings, claims and litigation arising in the ordinary course of business. In addition, the Company may receive letters alleging infringement of patent or other intellectual property rights. The Company is not currently a party to any other material legal proceedings, nor is it aware of any pending or threatened litigation that, in the Company’s opinion, would have a material adverse effect on the business, operating results, cash flows or financial condition should such litigation be resolved unfavorably.

The full extent of the impact of the COVID-19 pandemic on financial markets, economies worldwide and our business is highly uncertain. Research and development expenses and general and administrative expenses may vary significantly if there is an increased impact from COVID-19 on the costs and timing associated with the conduct of clinical trials and other related business activities. The Company is carefully monitoring the pandemic and the potential length and depth of the resulting economic impact on its financial

condition and results of operations. As of ~~June~~September 30, 2021, the Company was not aware of any contingencies and no related estimates were recorded on its financial statements as a result of COVID-19.

In August 2020, the Company filed a prospectus supplement, pursuant to which it sold $20.0 million of its common stock in ATM offerings. In February and May 2021, the Company filed prospectus supplements pursuant to which it can issue and sell an aggregate of up to an additional $30.0 million and $50.0 million of its common stock, respectively, from time to time in ATM offerings. During the ~~six~~nine months ended ~~June~~September 30, 2021, the Company sold ~~1,149,820~~3,257,285 shares under the ATM program for net proceeds of ~~$19.6~~$55.4 million, net of commissions and offering ~~expenses. There were 0 ATM sales during~~expenses of $2.1 million. During the ~~six~~ nine months ended ~~June~~September 30, ~~2020.~~2020, the Company sold 100,000 shares under the ATM program for net proceeds of $1.1 million, net of commissions and offering expenses. As of ~~June~~September 30, 2021, there was ~~$70.2~~$33.2 million remaining available under the ATM program.

~~In July~~Subsequent to September 30, 2021, the Company sold ~~200,000~~570,629 shares of its common stock under the ATM program for proceeds of ~~$3.9~~$12.2 million, net of commissions.

The Company is required to reserve and keep available out of its authorized but unissued shares of common stock a number of shares sufficient to effect the conversion of all outstanding options granted and available for grant under the incentive plans, shares reserved for issuance under the employee stock purchase plan and issued warrants.

	June 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Shares reserved under Series A warrant		7,802,241		7,802,241		7,790,879		7,802,241
Shares reserved under Series B warrant		2,524,732		2,574,727		2,524,732		2,574,727
Shares reserved for future option grants under equity plans		1,393,176		1,117,796		1,277,769		1,117,796
Outstanding stock options under equity incentive plans		4,786,469		4,146,928		4,880,267		4,146,928
Outstanding warrants		727,122		727,122		727,122		727,122
Shares reserved under the 2015 employee stock purchase plan		17,500		17,500		17,500		17,500
Total common stock reserved for issuance		17,251,240		16,386,314		17,218,269		16,386,314

On November 13, 2019, the Company completed an underwritten public offering whereby it issued 103,000 shares of Series A Convertible Voting Preferred Stock together with Series A warrants and Series B warrants for a combined purchase price of $1,000. The aggregate proceeds received by the Company was $97.7 million, net of underwriting discounts and commissions and offering expenses. Each share of Series A Preferred Stock was convertible into shares of the Company’s common stock equal to the stated value of the Series A Preferred Stock of $1,000 divided by the voting conversion price of $13.20. On January 29, 2020, all shares of Series A Preferred Stock converted into 7,803,273 shares of the Company’s common stock.

In connection with the Company’s November 2019 public offering of the Series A Preferred Stock, the Company issued Series A warrants to purchase up to 7,802,241 shares of common stock at an exercise price equal to $13.20, and Series B warrants to purchase up to 2,574,727 shares of common stock at an exercise price equal to $13.20. Both Series A and Series B warrants are exercisable following stockholder approval in January 2020 of an increase in authorized common stock sufficient to allow for the exercise of the warrants, subject to certain beneficial ownership limitations. The Series A warrants will expire five years from the date they first became exercisable or on January 22, 2025 and contain a cash and/or cashless exercise provision. The Series B warrants will expire on the 75^th day anniversary following the announcement of top-line data from the Company’s MOMENTUM Phase 3 clinical trial of momelotinib and may only be exercised by paying the exercise price in cash. During the ~~six~~nine months ended ~~June~~September 30, 2021, 151,500 Series B warrants to purchase 49,995 shares of common stock and 11,362 Series A warrants to purchase 11,362 shares of

common stock were exercised for proceeds of $0.7 ~~million.~~million and $0.1 million, respectively. There were 0 warrants exercised during the ~~six~~nine months ended ~~June~~September 30, 2020.

On September 8, 2021, the Company entered into Amendment No. 1 to Series A warrants and Amendment No. 1 to Series B warrants. These amendments clarified the methodology by which Series A warrants and Series B warrants would be assumed or settled in the event of a Fundamental Transaction, as defined under the warrant agreements, and provided for greater consistency in the treatment of these warrants by a publicly-traded or private buyer. The amendments did not result in changes to the fair value of these warrants. As such, 0 expense was recorded during the nine months ended September 30, 2021 relating to the modifications to the warrants.

In connection with obligations under the amendment to the Asset Purchase Agreement (See Note 7), the Company issued to Gilead 725,283 shares of the Company’s common stock and a warrant to purchase 725,283 shares of common stock at a price per share of $13.20 on January 31, 2020. The warrant is immediately exercisable, will expire on January 31, 2025 and contains a cash and/or cashless exercise provision.

In August 2018, in connection with a Loan and Security Agreement (Loan Agreement) with Silicon Valley Bank (SVB), the Company issued a warrant to SVB to purchase 1,839 of the Company’s common stock at a price per share of $74.80. The warrant is immediately exercisable, will expire on August 21, 2028 and contains a cashless exercise provision.

In the accompanying condensed consolidated statements of operations, the Company recognized stock-based compensation expense for its employees and non-employees as follows:

	Three Months Ended June 30,				Six Months Ended June 30,				Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020		2021		2020		2021		2020
	(in thousands)								(in thousands)
Research and development	$	1,776	$	933	$	3,439	$	1,479	$	1,823	$	1,174	$	5,262	$	2,653
General and administrative		1,452		2,684		2,720		3,056		1,457		900		4,177		3,956
Total stock-based compensation	$	3,228	$	3,617	$	6,159	$	4,535	$	3,280	$	2,074	$	9,439	$	6,609

The fair values of the Company’s stock-based awards granted during the three and ~~six~~nine months ended ~~June~~September 30, 2021 and 2020 were estimated as of the grant date using the Black-Scholes option pricing model, based on assumptions as follows:

	Three Months Ended June 30,						Six Months Ended June 30,						Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020			2021			2020			2021			2020
Expected term (in years)	5.3 – 6.1			5.3 – 7.0			5.3 – 7.0			5.3 – 7.0			6.0 – 6.1			5.5 – 7.0			5.3 – 7.0			5.3 – 7.0
Expected volatility		83 – 85	%		88 – 90	%		83 – 85	%		88 – 90	%		82 – 83	%		88 – 89	%		82 – 85	%		88 – 90	%
Risk-free interest rate		0.8 – 1.1	%		0.4 – 0.5	%		0.5 – 1.1	%		0.4 – 1.2	%		0.8 – 1.2	%		0.3 – 0.5	%		0.5 – 1.2	%		0.3 – 1.2	%
Expected dividend rate		—	%		—	%		—	%		—	%		—	%		—	%		—	%		—	%

The fair value of each stock option grant was determined by the Company on the date of grant using the methods and assumptions discussed below. Each of these inputs is subjective and generally requires significant judgment and estimation by management.

Expected Term—The expected term represents the period that stock-based awards are expected to be outstanding. As the Company’s historical share option exercise is limited due to a lack of sufficient data points, and does not provide a reasonable basis upon which to estimate an expected term, the expected term is derived by using the midpoint between the weighted-average vesting term and the contractual expiration period of the stock-based award.

Expected Volatility— For the three and ~~six~~nine months ended ~~June~~September 30, 2021, the expected volatility is derived from using the Company’s trading history for its common stock over a period equivalent to the expected term of the stock-based awards. For the three and ~~six~~nine months ended ~~June~~September 30, 2020, the expected volatility was derived from a weighted volatility using both the Company’s trading history for its common stock and the historical stock volatilities of peer public companies within its industry that are considered to be comparable to the Company’s business over a period equivalent to the expected term of the stock-based awards.

Risk-Free Interest Rate—The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the date of grant for zero-coupon U.S. Treasury notes with maturities approximately equal to the stock-based awards’ expected term.

Expected Dividend Rate—The expected dividend is zero as the Company has not paid nor anticipate paying any dividends on its common stock in the foreseeable future.

In September 2018, the Company’s Compensation Committee approved the 2018 Equity Inducement Plan (2018 Plan). The number of shares available for awards under the 2018 Plan was set to 37,500. On June 30, 2020, the Company’s Board of Directors approved an amendment to the 2018 Plan to increase the authorized number of shares available for issuance by 500,000 shares. On February 3, 2021, the Company’s Compensation Committee approved an amendment to the 2018 Plan to increase the authorized number of shares available for issuance by 500,000. As of ~~June~~September 30, 2021, 1,037,500 shares were reserved for issuance under the 2018 Plan. The exercise price of each stock-based award issued under the 2018 Plan is required to be no less than the fair value of the Company’s common stock. The vesting and exercise provisions of options or restricted awards granted are determined individually with each grant. Stock options have a 10-year life and expire if not exercised within that period or if not exercised within three months of cessation of employment with the Company or such longer period of time as specified in the option agreement.

The 2015 Equity Incentive Plan (2015 Plan) became effective on July 14, 2015. On January 21, 2020 the Company’s stockholders approved the following amendments to the 2015 Plan: (i) increase to the authorized number of shares available for issuance by 4,312,500 shares and proportionately increase the share limit related to incentive stock options, (ii) provide limits on the total value of compensation that may be granted to any non-employee director in each calendar year, and (iii) eliminate the annual individual grant limit to reflect changes to the tax law in 2017 tax legislation.

As of ~~June~~September 30, 2021, 5,123,736 shares were reserved for issuance under the 2015 Plan. The number of shares reserved for issuance under the 2015 Plan will increase automatically on January 1 of each calendar year 2016 through 2025 by the number of shares equal to 4% of the total outstanding shares of the Company’s common stock as of the immediately preceding December 31. The Company’s Board of Directors or Compensation Committee may reduce the amount of the increase in any particular year. The exercise price of each stock-based award issued under the 2015 Plan is required to be no less than the fair value of the Company’s common stock. The vesting and exercise provisions of options or restricted awards granted are determined individually with each grant. Stock options have a 10-year life and expire if not exercised within that period or if not exercised within three months of cessation of employment with the Company or such longer period of time as specified in the option agreement, unless modified.

The Company granted options under the 2008 Stock Plan (2008 Plan) until July 2015 when it was terminated as to future awards, although it continues to govern the terms of options that remain outstanding under the 2008 Plan. The 2008 Plan provided for the granting of Incentive Stock Options (ISO), nonqualified stock options and stock purchase rights. In connection with the Board of Director’s approval of the 2015 Plan, all remaining shares available for future award under the 2008 Plan were transferred to the 2015 Plan, and the 2008 Plan was terminated.

A summary of activity under the 2008 Plan, 2015 Plan and 2018 Plan and related information is as follows:

				Options Outstanding												Options Outstanding
	Shares Available for Grant			Number of Shares Outstanding			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value of Outstanding Options (in thousands)		Shares Available for Grant			Number of Shares Outstanding			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value of Outstanding Options (in thousands)
Outstanding — December 31, 2020		1,117,796			4,146,928		$	19.45		8.84	$	12,227		1,117,796			4,146,928		$	19.45		8.84	$	12,227
Awards authorized		945,139												945,139
Options granted		(869,460	)		869,460			16.87						(1,048,610	)		1,048,610			17.39
Options exercised		—			(30,218	)		13.29						—			(51,827	)		13.09
Options forfeited/cancelled		199,701			(199,701	)		17.43						263,444			(263,444	)		17.66
Outstanding — June 30, 2021		1,393,176			4,786,469		$	19.11	8.56		$	26,418
Exercisable — June 30, 2021					955,199		$	39.28		6.10	$	4,149
Vested and expected to vest — June 30, 2021					4,261,231		$	19.96	8.48		$	22,573
Outstanding — September 30, 2021														1,277,769			4,880,267		$	19.17	8.36		$	37,118
Exercisable — September 30, 2021																	1,249,757		$	33.16		6.54	$	8,510
Vested and expected to vest — September 30, 2021																	4,364,027		$	20.00	8.29		$	32,074

The weighted-average grant date fair values of options granted during the three and ~~six~~nine months ended ~~June~~September 30, 2021 was ~~$12.51~~$13.95 and ~~$11.93~~$12.27 per share, and ~~$10.14~~$8.85 and ~~$8.69~~$8.77 per share for the three and ~~six~~nine months ended ~~June~~September 30, 2020. The aggregate intrinsic value of options exercised was ~~$47,000~~$0.2 million and ~~$0.2~~$0.3 million for the three and ~~six~~nine months ended ~~June~~September 30, 2021. NaN options were exercised for the three and ~~six~~nine months ended ~~June~~September 30, 2020. The total grant date fair values of options vested for the three and ~~six~~nine months ended ~~June~~September 30, 2021 was ~~$2.5~~$3.3 million and ~~$5.9~~$9.2 million, and ~~$2.2~~$0.7 million and ~~$3.8~~$4.5 million for the three and ~~six~~nine months ended ~~June~~September 30, 2020.

In August 2020, the Company granted executives and employees 1,107,250 stock options with performance-based conditions. Vesting is achieved based upon the completion of pre-determined milestones. As of ~~June~~September 30, 2021, all of the outstanding performance-based options remain unvested. For the three and ~~six~~nine months ended ~~June~~September 30, 2021, the Company ~~has~~ recognized approximately $0.7 million and ~~$1.5~~$2.2 million in stock-based compensation expense related to the options with performance-based criteria. ~~NaN expense pertaining to performance-based options was recognized for~~For the three and ~~six~~nine months ended ~~June~~September 30, ~~2020.~~2020, the Company recognized $0.2 million in stock-based compensation expense related to the options with performance-based criteria.

In May 2020, the Company entered into a separation agreement with Dr. Glover, the Company’s former President and Chief Executive Officer, in connection with his resignation. Pursuant to the separation agreement, Dr. Glover’s unvested options that would have vested during the one-year period from the date of separation accelerated and vested immediately. The vesting date of all remaining unvested options accelerated by one year, and continued to vest through December 31, 2020, per the terms of the separation agreement. Furthermore, Dr. Glover received an extension of the expiration date of his vested stock options to 75 days following the Company’s announcement of the top-line data results from its MOMENTUM clinical trial. Compensation costs relating to the vesting acceleration and the modifications to option terms was $2.2 million for the three and ~~six~~nine months ended ~~June~~September 30, 2020.

As of ~~June~~September 30, 2021, total unrecognized stock-based compensation related to unvested stock options with only service-vesting conditions was ~~$27.3~~$26.7 million and are expected to be recognized over a remaining weighted-average period of ~~3.0~~2.9 years. As of ~~June~~September 30, 2021, total unrecognized stock-based compensation related to unvested stock options with performance-based conditions was ~~$6.9~~$6.1 million.

The Company did 0t record a provision for U.S. federal income taxes for the three and ~~six~~nine months ended ~~June~~September 30, 2021 because it expects to generate a loss for the year ended December 31, 2021. The income tax provision for the three and ~~six~~nine months ended ~~June~~September 30, 2021 and 2020 represented foreign taxes. The Company’s net U.S. deferred tax assets continue to be offset by a full valuation allowance.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion contains management’s discussion and analysis of our financial condition and results of operations and should be read together with the unaudited condensed consolidated financial statements and the notes thereto included in Part I, Item 1 of this Quarterly Report and with our audited consolidated financial statements and related notes thereto for the year ended December 31, 2020, included in our Annual Report on Form 10-K. This discussion and other parts of this Quarterly Report contain forward-looking statements that involve risks and uncertainties, such as our plans, impact of the COVID-19 pandemic, objectives, expectations, intentions and beliefs. Our actual results could differ materially from those discussed in these forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified below and those discussed in the section entitled “Risk Factors” included elsewhere in this report.

We are a late-stage biopharmaceutical company on a mission to deliver targeted therapies that treat rare forms of cancer. Our main focus is the development of momelotinib, an investigational agent for the treatment of myelofibrosis. Currently, momelotinib is in a global Phase 3 clinical trial for patients with myelofibrosis, called the MOMENTUM study, that, if successful, will be registration enabling. At its completion, we expect approximately 1,000 myelofibrosis patients to have received momelotinib, and several of our clinical trial patients remain on treatment more than 11 years later.

In the third quarter of 2018, we acquired momelotinib from Gilead Sciences, Inc. (Gilead), which had completed several late-stage trials of the drug candidate in patients with myelofibrosis. Myelofibrosis is characterized by progressive anemia and thrombocytopenia and currently approved JAK inhibitor therapies, ruxolitinib and fedratinib, can induce or further exacerbate this myelosuppression, limiting their use in first line treatment and resulting in a population of second line patients who are no longer able to benefit from such therapies. Momelotinib is a novel, orally bioavailable JAK1 (Janus kinase 1), JAK2 (Janus kinase 2) and ACVR1 (Activin A receptor type 1) / activin receptor-like kinase-2 (ALK2) inhibitor with a differentiated mechanism of action, enabling it to potentially address all three hallmarks of disease in myelofibrosis: anemia of inflammation, constitutional symptoms and enlarged spleen.

In December 2018, we reported new data for momelotinib collated from the two completed SIMPLIFY Phase 3 clinical trials and a translational biology study in transfusion dependent patients with myelofibrosis. Data from the latter study were also concurrently presented in a poster at the American Society of Hematology (ASH) Annual Meeting. We reported aggregated transfusion independence responses from more than 150 intermediate and high-risk transfusion dependent myelofibrosis patients demonstrating robust and consistent response rates within and across the clinical studies. More than 44% of these patients became transfusion free for at least 12 weeks and nearly 50% were transfusion independent for at least 8 weeks.

In the second quarter of 2019, we announced that we had obtained regulatory clarity with the U.S. Food and Drug Administration (FDA) concerning the design of a Phase 3 clinical trial intended to support potential registration of momelotinib. We also announced that the FDA had granted Fast Track designation to momelotinib for the treatment of patients with intermediate/high-risk myelofibrosis who have previously received a JAK inhibitor.

Following receipt of this clarity, we announced the design of the MOMENTUM Phase 3 clinical trial in myelofibrosis, which we subsequently launched in the fourth quarter of 2019. MOMENTUM is a randomized double-blind trial designed to enroll 180 myelofibrosis patients who are symptomatic and anemic and have been treated previously with a JAK inhibitor. The Primary Endpoint of the trial is the Total Symptom Score (TSS) response rate of momelotinib compared to danazol at Week 24 (99% power; p-value < 0.05). Danazol has been selected as an appropriate treatment comparator given its use to ameliorate anemia in myelofibrosis patients, as recommended by National Comprehensive Cancer Network (NCCN) and European Society for Medical Oncology (ESMO) guidelines. Patients are being randomized 2:1 to receive either momelotinib or danazol. After 24 weeks of treatment, patients on danazol are being allowed to crossover to receive momelotinib.

During the fourth quarter of 2019, we reported new analyses of red blood cell (RBC) transfusion data from SIMPLIFY-1, a double-blind Phase 3 trial of momelotinib head-to-head versus ruxolitinib in JAK inhibitor-naïve patients, which were presented in a poster by Dr. Ruben Mesa, Director of the Mays Cancer Center, home to UT Health San Antonio MD Anderson Cancer Center, at the ASH Annual Meeting. These analyses demonstrated that patients who received momelotinib had significantly decreased transfusion requirements compared to those treated with ruxolitinib, including an odds ratio of nearly 10 for receiving no transfusions during the 24-week study period. Transfusion dependency and moderate to severe anemia are critical negative prognostic factors for overall survival in myelofibrosis.

During the second quarter of 2020, at the 25^th European Hematology Association (EHA) Virtual Congress, we reported favorable Long-Term Safety and Dose Intensity data for momelotinib from more than 550 patients across the two previously conducted SIMPLIFY Phase 3 studies and their subsequent ongoing extended treatment periods. More than 90 SIMPLIFY-1 and SIMPLIFY-2 patients continued to receive momelotinib for 3.5 years or longer. These data were presented in posters by Professor Claire Harrison, Guy's and St. Thomas' NHS Foundation Trust, London, United Kingdom, and Dr. Vikas Gupta, Princess Margaret Cancer Centre, Toronto, Canada. The key findings were:

At the ASH Annual Meeting in December 2020, we released updated analyses from the previously completed Phase 3 SIMPLIFY studies of momelotinib, including overall survival data as well as efficacy data for momelotinib compared to ruxolitinib in patients with low platelet levels. The overall survival data received an oral presentation by Dr. Srdan Verstovsek of the University of Texas MD Anderson Cancer Center in Houston, Texas, USA; efficacy data by platelet strata were presented in a poster by Dr. Jean-Jacques Kiladjian, Saint Louis Hospital, Paris, France. Key findings were:

Most recently at the EHA Annual Meeting held in June 2021, we announced additional data analyses from the SIMPLIFY studies highlighting transfusion independence with momelotinib is associated with improved overall survival, including in patients with anemia at baseline. In addition, transfusion independence is seen irrespective of baseline degree of anemia, platelet count or transfusion status. Together, these data suggest the goal of achieving transfusion independence should become an important driver of treatment decisions in myelofibrosis.

Also in June 2021, we announced that the MOMENTUM Phase 3 study enrollment has been completed, enrolling 195 patients based on a planned 180 patients. Topline data are anticipated ~~in the first quarter~~by February of 2022. Assuming positive results, we expect to ~~file~~submit for regulatory approval in ~~mid-2022,~~the second quarter of 2022, and if approved, we could anticipate a commercial launch in first half of 2023. As we approach pivotal data from the late-stage development of momelotinib, we continue to explore opportunities to expand our pipeline via potential combination studies for momelotinib, such as ~~well as additional pipeline assets.~~our newly in-licensed compound SRA515.

In August 2021, we entered into an agreement with AstraZeneca AB (AstraZeneca) to acquire an exclusive global license for ~~AZD5153,~~SRA515 (formerly AZD5153), a potent and selective bromodomain-containing protein 4 (BRD4) bromodomain and extraterminal (BET) inhibitor with a novel bivalent binding mode. We plan to initiate a Phase 2 study examining momelotinib in combination with ~~AZD5153~~SRA515 for the treatment of myelofibrosis in the first half of 2022. We continue to evaluate additional studies and may initiate other new trials for SRA515 in 2022.

Due to COVID-19, our clinical trials previously have been and could again be affected. We experienced delays in planned site initiations and activations and may experience future delays, which could impact anticipated timelines.

We have not generated any product revenue related to our primary business purpose and have incurred significant net losses to date. As of ~~June~~September 30, 2021, we had ~~$90.7~~$97.1 million of cash and cash equivalents. Given our projected operating requirements and our existing cash and cash equivalents, we are projecting insufficient liquidity to fund our operations for the next twelve months beyond the date of the issuance of these condensed consolidated financial statements included in this Quarterly Report on Form 10-Q, which raises substantial doubt about our ability to continue as a going concern. The accompanying condensed consolidated financial statements included in this Quarterly Report on Form 10-Q have been prepared on a going concern basis. This basis contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business and does not include any adjustments that might be necessary if we are unable to continue as a going concern.

To fund our operating plans and remain as a going concern, we intend to seek additional funds through equity or debt financings, collaborations, licensing transactions or other sources. However, there can be no assurance that we will be able to complete any such transaction on acceptable terms or otherwise. Our existing cash and cash equivalents will not be sufficient for us to complete development of our product candidates and prepare for commercializing momelotinib. Accordingly, we will continue to require substantial additional capital to continue our clinical development and potential commercialization activities. We are also exploring non-dilutive options that could provide additional capital to support our North American commercialization strategy.

Our portfolio also includes SRA737, a selective, orally bioavailable small molecule inhibitor of Checkpoint kinase 1 (Chk1), an emerging target for the treatment of cancer which has a key role in the DNA Damage Response (DDR). In November 2020, we entered into an amendment to the License Agreement with CRT Pioneer Fund (CPF) to allow for the potential future clinical development of SRA737. We continue to evaluate the optimal development plan for SRA737 in solid ~~tumors.~~tumors and may initiate new trials for SRA737 in 2022.

We wholly own momelotinib, subject to future milestone payments and royalties, and retain the global commercialization rights to ~~AZD5153~~SRA515 and SRA737.

Since inception, we have devoted substantially all of our resources to research and development activities, including the clinical development of momelotinib, SRA515, SRA737 and certain former product candidates, and to provide general and administrative support for our operations. We have never generated product revenue and have incurred significant net losses since inception. Our net losses were ~~$20.6~~$28.6 million and ~~$40.5~~$69.2 million for the three and ~~six~~nine months ended ~~June~~September 30, 2021 and ~~$16.5~~$14.5 million and ~~$48.4~~$62.9 million for the three and ~~six~~nine months ended ~~June~~September 30, 2020, respectively. As of ~~June~~September 30, 2021, we had an accumulated deficit of ~~$887.1~~$915.8 million, of which approximately $428.0 million pertained to the revaluation and conversion of redeemable convertible preferred stock upon our initial public offering in July 2015, $37.2 million related to changes in fair value of our Series A and Series B warrant liabilities until their reclassification to equity in the first quarter of 2020, and $12.0 million pertained to a securities issuance obligation settled during the first quarter of 2020.

The extent of the impact of COVID-19 on our operational and financial performance will depend on certain developments, including the duration and spread of the outbreak and any variants which have resulted in increased cases and has led to the reimplementation of restrictions in many areas, impact on our clinical studies, employee or industry events, and effect on our suppliers and manufacturers, all of which are uncertain and cannot be predicted. The COVID-19 pandemic and its adverse effects have become more prevalent in the locations where we, our CROs, suppliers or third-party business partners conduct business and as a result, we continue to experience some disruptions in our operations. We may experience constrained supply of momelotinib, orthe comparator drug required for our ongoing Phase 3 trial, SRA515 or, with respect to our planned clinical trials, delays in enrollment, participant dosing, distribution of clinical trial materials, study monitoring and data analysis that could materially adversely impact our business, results of operations and overall financial performance in future periods. Specifically, we may experience impact from changes in how we and companies worldwide conduct business due to the COVID-19 pandemic, including but not limited to restrictions on travel and in-person meetings, prioritization of hospital resources toward pandemic effort, delays in review by the FDA and comparable foreign regulatory agencies, and disruptions in our supply chain for ~~momelotinib.~~momelotinib or SRA515. Any such delays to our planned MOMENTUM timeline could also impact the use and sufficiency of our existing cash reserves, and we may be required to raise additional capital earlier than we had previously planned. We may be unable to raise additional capital if and when needed, which may result in further delays or suspension of our development plans. As of the filing date of this Quarterly Report on Form 10-Q, the extent to which COVID-19 may impact our financial condition, results of operations or guidance is uncertain. The effect of the COVID-19 pandemic will not be fully reflected in our results of operations and overall financial performance until future periods. See the section entitled “Risk Factors” included elsewhere in this report for further discussion of the possible impact of the COVID-19 pandemic on our business.

We have funded our operations to date primarily from the issuance and sale of our common stock and convertible voting preferred stock and accompanying warrants through public offerings (including At-The-Market (ATM) equity offerings), ~~and~~ our convertible and redeemable convertible preferred stock in private financings and, to a lesser extent, through exercises of our ~~preferred~~ stock ~~warrants in private financings.~~options and warrants. As of ~~June~~September 30, 2021, we had cash and cash equivalents of ~~$90.7~~$97.1 million.

Collaboration revenue consists of upfront license fees recognized under a collaboration agreement with Carna Biosciences, Inc.

The largest recurring component of our total operating expenses has historically been our investment in research and development activities, including the development of momelotinib. We expect our research and development expenses will increase over the next few years as we advance momelotinib, develop SRA515, ~~potentially~~ including a combination ~~studies as the field of myelofibrosis evolves,~~study examining momelotinib with SRA515, achieve regulatory milestones that trigger payments due under our Asset Purchase Agreement with Gilead, including a milestone payment of $25.0 million due upon the approval of momelotinib from the FDA, achieve certain milestones that trigger payments due under our license agreement with AstraZeneca, pursue regulatory approval of momelotinib in the United States and other jurisdictions, expand our portfolio of product candidates and prepare for potential commercialization, which will require a significant investment in areas related to contract manufacturing and inventory buildup.

The process of conducting clinical trials necessary to obtain regulatory approval is costly and time consuming. We may never succeed in achieving marketing approval for our lead product candidate, momelotinib. The probability of success of our product candidate may be affected by numerous factors, including clinical data, regulatory developments, competition, manufacturing capability and commercial viability. As a result, we are unable to determine the duration and completion costs of our research and development projects or when and to what extent we will generate revenue from the commercialization of momelotinib.

General and administrative expenses consist of personnel-related costs, facility-related costs, business insurance, allocated expenses and professional fees for services, including legal, pre-commercialization activities, patent prosecution and maintenance, human resources, audit and accounting services. Personnel-related costs consist of salaries, benefits, stock-based compensation, recruitment fees, severance costs and travel costs.

We expect to incur additional expenses associated with supporting our growing research and development activities, preparing for potential commercialization, continuing to operate as a public company and other administration and professional services.

Our common stock warrants issued in connection with our November 2019 financing were classified as liabilities on our condensed consolidated balance sheets and, as such, were re-measured to fair value until January 2020, when they were no longer considered derivative instruments. Changes in fair value, which were directly attributable to changes in the fair value of the underlying stock and discount for lack of marketability, were recorded as an expense in the condensed consolidated statement of operations.

Other expense (income), net primarily consists of interest earned on our cash and cash equivalents and foreign currency exchange gains and losses related to transactions and monetary asset and liability balances denominated in currencies other than the U.S. dollar. Foreign currency exchange gains and losses may fluctuate in the future due to changes in foreign currency exchange rates.

Provision for ~~(benefit from)~~ income taxes, net consists of federal and state income taxes in the United States, income tax benefit resulting from research and development tax credits in Canada, income taxes in Canada and Australia, as well as deferred income taxes reflecting the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, and changes in the related valuation allowance.

Three Months Ended ~~June~~September 30, 2021 Compared to Three Months Ended ~~June~~September 30, 2020

	Three Months Ended June 30,						Change			Three Months Ended September 30,						Change
	2021			2020			$			2021			2020			$
				(in thousands)									(in thousands)
Collaboration revenue										$	-		$	100		$	(100	)
Operating expenses:
Research and development	$	14,149		$	10,189		$	3,960			21,618			10,432			11,186
General and administrative		6,424			6,260			164			6,985			4,112			2,873
Total operating expenses		20,573			16,449			4,124			28,603			14,544			14,059
Loss from operations		(20,573	)		(16,449	)		(4,124	)		(28,603	)		(14,444	)		(14,159	)
Other expense, net		48			24			24
Other expense (income), net											(3	)		22			(25	)
Loss before provision for (benefit from) income taxes, net		(20,621	)		(16,473	)		(4,148	)		(28,600	)		(14,466	)		(14,134	)
Provision for (benefit from) income taxes, net		9			(11	)		20
Provision for income taxes, net											47			39			8
Net loss	$	(20,630	)	$	(16,462	)	$	(4,168	)	$	(28,647	)	$	(14,505	)	$	(14,142	)

Collaboration revenue of $0.1 million was recognized during the three months ended September 30, 2020 pursuant to a $0.3 million upfront fee received from a collaboration agreement with Carna Biosciences, Inc. No collaboration revenue was recognized during the three months ended September 30, 2021.

Research and development expenses increased ~~$4.0~~$11.2 million, from ~~$10.2~~$10.4 million for the three months ended ~~June~~September 30, 2020 to ~~$14.1~~$21.6 million for the three months ended ~~June~~September 30, 2021. The increase was primarily due to ~~costs~~an upfront cash payment of $8.0 million that was made to AstraZeneca for ~~momelotinib including a $1.3 million increase in clinical trial and development costs and a $0.7 million increase in third-party manufacturing costs.~~the exclusive global license of SRA515. Also attributing to the increase was a ~~$2.0~~$2.2 million increase in personnel-related and allocated overhead costs, of which ~~$0.8~~$0.6 million pertained to an increase in non-cash stock-based ~~compensation.~~compensation, a $1.0 million increase in third-party manufacturing costs for momelotinib, and a $0.3 million increase in other research and support costs. These increases were partially offset by a $0.3 million decrease in clinical trial and development costs for momelotinib.

General and administrative expenses increased ~~$0.2~~$2.9 million, from ~~$6.3~~$4.1 million for the three months ended ~~June~~September 30, 2020 to ~~$6.4~~$7.0 million for the three months ended ~~June~~September 30, 2021. The increase was due to a ~~$0.4~~$1.7 million increase in personnel-related and allocated overhead costs, of which $0.6 million pertained to an increase in non-cash stock-based compensation, and a $1.2 million increase in professional fees, primarily relating to pre-commercial costs for ~~momelotinib, which was offset by a decrease of $0.2 million in personnel-related and allocated overhead costs.~~

~~Other expense, net increased from $24,000 of other expense, net for the three months ended June 30, 2020 to $48,000 other expense, net for the three months ended June 30, 2021.~~

~~The provision for (benefit from) income taxes, net for the three months ended June 30, 2021 and 2020represented foreign taxes.~~momelotinib.

~~Six~~Nine Months Ended ~~June~~September 30, 2021 Compared to ~~Six~~Nine Months Ended ~~June~~September 30, 2020

	Six Months Ended June 30,						Change			Nine Months Ended September 30,						Change
	2021			2020			$			2021			2020			$
				(in thousands)									(in thousands)
Collaboration revenue										$	-		$	100		$	(100	)
Operating expenses:
Research and development	$	28,102		$	21,780		$	6,322			49,720			32,212			17,508
General and administrative		12,289			10,804			1,485			19,274			14,916			4,358
Total operating expenses		40,391			32,584			7,807			68,994			47,128			21,866
Loss from operations		(40,391	)		(32,584	)		(7,807	)		(68,994	)		(47,028	)		(21,966	)
Other expense (income), net
Changes in fair value of warrant liabilities		—			16,240			(16,240	)		—			16,240			(16,240	)
Other expense (income), net		77			(517	)		594			74			(495	)		569
Total other expense (income), net		77			15,723			(15,646	)		74			15,745			(15,671	)
Loss before provision for income taxes, net		(40,468	)		(48,307	)		7,839			(69,068	)		(62,773	)		(6,295	)
Provision for income taxes, net		77			67			10			124			106			18
Net loss	$	(40,545	)	$	(48,374	)	$	7,829		$	(69,192	)	$	(62,879	)	$	(6,313	)

Collaboration revenue of $0.1 million was recognized during the nine months ended September 30, 2020 pursuant to a $0.3 million upfront fee received from a collaboration agreement with Carna Biosciences, Inc. No collaboration revenue was recognized during the nine months ended September 30, 2021.

Research and development expenses increased ~~$6.3~~$17.5 million, from ~~$21.8~~$32.2 million for the ~~six~~nine months ended ~~June~~September 30, 2020, to ~~$28.1~~$49.7 million for the ~~six~~nine months ended ~~June~~September 30, 2021. The increase was due to an upfront cash payment of $8.0 million that was made to AstraZeneca for the exclusive global license of SRA515, a $5.8 million increase in personnel-related and allocated overhead costs, of which $2.6 million pertained to an increase in non-cash stock-based compensation, and costs for momelotinib, including a ~~$3.0~~$2.8 million increase in clinical trial and development costs and a ~~$1.4~~$2.4 million increase in third-party manufacturing costs. ~~Also attributing to the increase was~~ ~~a $3.7 million increase in personnel-related and allocated overhead costs~~ ~~of which $2.0 million pertained to an increase in non-cash stock-based compensation~~. These increases were partially offset by a $1.5 million non-cash charge incurred in 2020 to recognize the change in fair value of an obligation to issue securities to Gilead until the issuance of the securities in January ~~2020, and a $0.3 million decrease in clinical trial, third-party manufacturing, research and preclinical costs for SRA737.~~2020.

General and administrative expenses increased ~~$1.5~~$4.4 million, from ~~$10.8~~$14.9 million for the ~~six~~nine months ended ~~June~~September 30, 2020 to ~~$12.3~~$19.3 million for the ~~six~~nine months ended ~~June~~September 30, 2021. The increase was due to a ~~$1.0~~$2.7 million increase in personnel-related and allocated overhead costs, of which $0.2 million pertained to an increase in non-cash stock-based compensation, and an increase of ~~$0.5~~$1.7 million in professional fees primarily relating to pre-commercial costs for momelotinib.

The changes in the fair value of our warrant liabilities for the ~~six~~nine months ended ~~June~~September 30, 2020, were directly attributable to the change in the fair value of the underlying stock and discount for lack of marketability.

Other expense (income), net increased from other income, net of $0.5 million for the ~~six~~nine months ended ~~June~~September 30, 2020 to other expense, net of $0.1 million for the ~~six~~nine months ended ~~June~~September 30, 2021. The increase in other expense was primarily attributable to a decrease in interest income due to lower interest rates for the ~~six~~nine months ended ~~June~~September 30, 2021.

~~The provision for income taxes of $0.1 million for the six months ended June 30, 2021 and 2020 represented foreign taxes.~~

Since our inception, we have never generated product revenue and have incurred significant net losses. We have funded our operations to date primarily from the issuance and sale of our common stock and convertible voting preferred stock and accompanying warrants through public offerings (including ATM equity offerings), our convertible and redeemable convertible preferred stock in private financings and, to a lesser extent, through exercises of our ~~preferred~~ stock ~~warrants issued in private financings.~~options and warrants. Our net losses for the three and ~~six~~nine months ended ~~June~~September 30, 2021 were ~~$20.6~~$28.6 million and ~~$40.5~~$69.2 million and for the three and ~~six~~nine months ended ~~June~~September 30, 2020 were ~~$16.5~~$14.5 million and ~~$48.4~~$62.9 million, respectively. As of ~~June~~September 30, 2021, we had an accumulated deficit of ~~$887.1~~$915.8 million, of which approximately $428.0 million pertained to the revaluation and conversion of redeemable convertible preferred stock upon our initial

public offering in July 2015, $37.2 million related to changes in fair value of our Series A and Series B warrant liabilities until their reclassification to equity, and $12.0 million pertained to a securities issuance obligation settled in the first quarter of 2020. Our principal sources of liquidity as of ~~June~~September 30, 2021 were cash and cash equivalents of ~~$90.7~~$97.1 million. Given our projected operating requirements and our existing cash and cash equivalents, we are projecting insufficient liquidity to fund our operations for the next twelve months beyond the date of the issuance of these condensed consolidated financial statements included in this ~~this~~ Quarterly Report on Form 10-Q, which raises substantial doubt about our ability to continue as a going concern.

In August 2020, we filed a prospectus supplement, pursuant to which we issued and sold $20.0 million of our common stock from time to time in ATM offerings. In February and May 2021, we filed prospectus supplements pursuant to which we can issue and sell an aggregate of up to an additional $30.0 million and $50.0 million of our common stock, respectively, from time to time in ATM offerings. During the second half of 2020, we sold 732,752 shares under the ATM program for proceeds of $8.9 million, net of commissions and offering expenses. During the ~~six~~nine months ended ~~June~~September 30, 2021, we sold ~~1,149,820~~3,257,285 shares under the ATM program for proceeds of ~~$19.6~~$55.4 million, net of commissions and offering expenses. ~~In July~~Subsequent to September 30, 2021, we sold ~~200,000~~570,629 shares of our common stock under the ATM program for proceeds of ~~$3.9~~$12.2 million, net of commissions.

We expect to incur significant expenses and increasing operating losses for the foreseeable future. We anticipate that our expenses will increase substantially as we:

To fund our operating plans, we will need to raise additional capital. Our existing cash and cash equivalents will not be sufficient for us to complete development of our product candidates and prepare for commercializing momelotinib. Accordingly, we will continue to require substantial additional capital to continue our clinical development and potential commercialization activities. In addition, the outstanding Series B warrants, if fully exercised, would provide approximately $33.3 million in proceeds to us. We cannot assure you that the outstanding Series B warrants will be exercised, or that we will ever be profitable or generate positive cash flow from operating activities. However, our forecast for the period of time through which our financial resources will be adequate to support our operations is a forward-looking statement that involves risks and uncertainties, and actual results could vary materially. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our preclinical and clinical development efforts, including any potential impacts of the COVID-19 pandemic on our clinical development efforts, costs related to momelotinib commercialization efforts, costs related to potentially develop momelotinib in combination studies or costs to develop additional product candidates.

We plan to continue to fund our operating plans through equity financings. We also evaluate opportunities for other strategic transactions, such as collaborations, strategic partnerships and alliances or licensing arrangements from time to time. To the extent that we raise additional capital through future equity financings, the ownership interest of our stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our existing common stockholders. If we raise additional funds through the issuance of debt securities, these securities could contain covenants that would restrict our operations. If we raise additional funds through strategic partnerships and alliances or licensing arrangements with third parties, we

may have to relinquish valuable rights to our technologies or momelotinib or grant licenses on terms unfavorable to us. There can be no assurance that such additional financing, if available, can be obtained on terms acceptable to us. If we are unable to obtain such additional financing, we would need to reevaluate our future operating plans. We are exploring options to support potential future

continued development of SRA737. There can be no assurance that we will successfully obtain the funding or support necessary to advance SRA737 or obtain such funding or support on commercially reasonable terms.

	Six Months Ended June 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
	(in thousands)						(in thousands)
Cash used in operating activities	$	(33,966	)	$	(24,225	)	$	(63,714	)	$	(39,619	)
Cash used in investing activities		(40	)		(12	)		(40	)		(12	)
Cash provided by financing activities		20,693			—			56,851			1,140
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash		(52	)		(58	)		(84	)		(23	)
Net decrease in cash, cash equivalents and restricted cash	$	(13,365	)	$	(24,295	)	$	(6,987	)	$	(38,514	)

For the ~~six~~nine months ended ~~June~~September 30, 2021, cash used in operating activities of $34.0 million was primarily attributable to a net loss of $40.5 million, partially offset by $6.3 million in non-cash charges, which consisted primarily of $6.2 million of non-cash stock-based compensation, and a $0.3 million change in net operating assets and liabilities.

~~For the six months ended June 30, 2020, cash used in operating activities of $24.2~~$63.7 million was attributable to a net loss of ~~$48.4~~$69.2 million ~~partially offset by $22.4 million in non-cash charges~~ and a ~~net~~ change of ~~$1.7~~$4.2 million in our net operating assets and ~~liabilities.~~liabilities, partially offset by $9.7 million in non-cash charges, consisting primarily of $9.4 million of non-cash stock-based compensation. The change in net operating assets and liabilities was primarily attributable to increases in cash outflows due to timing of payment of our operating expenses.

For the nine months ended September 30, 2020, cash used in operating activities of $39.6 million was attributable to a net loss of $62.9 million and a net change of $1.5 million in our net operating assets and liabilities, partially offset by $24.7 million in non-cash charges. The non-cash charges consisted primarily of a $16.2 million change in fair value of our warrant liabilities, a $1.5 million non-cash charge relating to the securities issuable to Gilead in connection with the amendment to the Asset Purchase Agreement, and ~~$4.5~~$6.6 million of non-cash stock-based compensation. The change in net operating assets and liabilities was primarily attributable to ~~an increase~~increases in cash outflows due to timing of ~~$1.0 million in~~payment of our ~~accounts payable, a $1.0 million increase resulting from changes in prepaid~~operating expenses ~~and other assets and a $0.3 million increase in deferred revenue, partially offset by a decrease in our accrued, other and operating lease liabilities of $0.5 million.~~.

For the ~~six~~nine months ended ~~June~~September 30, 2021 and 2020, cash used in investing activities was attributable to the purchase of property and equipment.

For the ~~six~~nine months ended ~~June~~September 30, 2021, cash provided by financing activities of ~~$20.7~~$56.9 million consisted of ~~$19.6~~$55.4 million of net proceeds from the sale of ~~1,149,820~~3,257,285 shares under the ATM program, ~~$0.7~~$0.8 million from the exercise of warrants to purchase common stock and ~~$0.4~~$0.7 million from the exercise of options to purchase common stock.

For the ~~six~~nine months ended ~~June~~September 30, 2020, no cash ~~was~~ provided by financing ~~activities.~~activities of $1.1 million consisted of net proceeds from the sale of 100,000 shares under the ATM program.

We do not currently engage in off-balance sheet financing arrangements. In addition, we do not have any interest in entities referred to as variable interest entities, which includes special purpose entities and other structure finance entities.

Our unaudited condensed consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP). The preparation of these condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, costs and expenses, and related disclosures. These estimates

form the basis for judgments we make about the carrying values of our assets and liabilities, which are not readily apparent from other sources. We base our estimates and judgments on historical experience and on various other assumptions that we believe are

reasonable under the circumstances. On an ongoing basis, we evaluate our estimates and assumptions. Our actual results may differ from these estimates under different assumptions or conditions.

We believe that the assumptions and estimates associated with research and development expenses, stock-based compensation, warrant liabilities and securities issuance obligation have the most significant impact on our condensed consolidated financial statements. Therefore, we consider these to be our critical accounting policies and estimates.

There have been no significant changes in our critical accounting policies and estimates as compared to the critical accounting policies and estimates disclosed in Management’s Discussion and Analysis of Financial Condition and Operations included in our Annual Report on Form 10-K for the year ended December 31, 2020.

We are exposed to market risks in the ordinary course of our business. These risks primarily include interest rate sensitivities and foreign currency risk.

We had cash and cash equivalents of ~~$90.7~~$97.1 million as of ~~June~~September 30, 2021, which consisted primarily of bank deposits and money market funds. Our primary exposure to market risk is interest income sensitivity, which is affected by changes in the general level of U.S. interest rates. While the instruments in our portfolio are of short-term nature and a sudden change in market interest rates would not be expected to have a material impact, a zero-rate environment for an extended period of time could adversely affect our results of operations. We do not believe that our cash or cash equivalents have significant risk of default or illiquidity.

Our condensed consolidated results of operations and cash flows are subject to fluctuations due to changes in foreign currency exchange rates. A substantial majority of our expenses are denominated in U.S. Dollars, with the remainder in Canadian Dollars, Swiss Franc, Australian Dollars and British Pounds. Our consolidated results of operations and cash flow are, therefore, subject to fluctuations due to changes in foreign currency exchange rates and may be adversely affected in the future due to changes in foreign exchange rates. To date, we have not entered into any hedging arrangements with respect to foreign currency risk or other derivative instruments. The effect of a hypothetical 10% change in foreign currency exchanges rates applicable to our business would not have a material impact on our operating loss.

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, have performed an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as amended) as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of ~~June~~September 30, 2021 to ensure that information required to be disclosed by us in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Security and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely discussion regarding required disclosures.

Any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objective and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the quarter ended ~~June~~September 30, 2021 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

From time to time, we may become subject to other legal proceedings, claims and litigation arising in the ordinary course of business. In addition, we may receive letters alleging infringement of patents or other intellectual property rights. We are not currently a party to any other material legal proceedings, nor are we aware of any pending or threatened litigation that, in the opinion of our management, would have a material adverse effect on our business, operating results, cash flows or financial conditions should such litigation be resolved unfavorably. Regardless of outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Investing in our common stock involves a high degree of risk. You should carefully consider the risks described below, as well as the other information in this report, including our consolidated financial statements and the related notes and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” before deciding whether to invest in our common stock. The occurrence of any of the events or developments described below could harm our business, financial condition, results of operations and growth prospects. In such an event, the market price of our common stock could decline, and you may lose all or part of your investment.

The below summary of risk factors provides an overview of many of the risks we are exposed to in the normal course of our business activities. As a result, the below summary risks do not contain all of the information that may be important to you, and you should read the summary risks together with the more detailed discussion of risks set forth following this section under the heading "Risk Factors," as well as elsewhere in this Quarterly Report on Form 10-Q. Additional risks, beyond those summarized below or discussed elsewhere in this Quarterly Report on Form 10-Q, may apply to our activities or operations as currently conducted or as we may conduct them in the future or in the markets in which we operate or may in the future operate. Consistent with the foregoing, we are exposed to a variety of risks, including risks associated with the following:

We have incurred net losses in every year since our inception and anticipate that we will continue to incur net losses for the foreseeable future. In addition, we may be unable to continue as a going concern.

We are a clinical stage hematology and oncology company with a limited operating history. Since inception, we have incurred significant operating losses. Our net losses were ~~$40.5~~$69.2 million and $80.9 million for the ~~six~~nine months ended ~~June~~September 30, 2021 and the year ended December 31, 2020 respectively. As of ~~June~~September 30, 2021, we had an accumulated deficit of ~~$887.1~~$915.8 million. In connection with the preparation of this Quarterly Report on Form 10-Q for the ~~six~~nine months ended ~~June~~September 30, 2021, we are projecting insufficient liquidity to fund our operations for the next twelve months beyond the date of the issuance of the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q, which raises substantial doubt about our ability to continue as a going concern. Investment in hematology and oncology product development is highly speculative because it entails substantial upfront capital expenditures and significant risk that any potential product candidate will fail to demonstrate adequate efficacy or an acceptable safety profile, gain regulatory approval and become commercially viable. For example, in June 2016, we decided to suspend the development of our former lead product candidate PNT2258 after an interim analysis of data from a Phase 2 clinical trial of PNT2258 indicated only modest efficacy. We have also decided to suspend the continued development of SRA141, which was licensed to Carna Biosciences in June 2020, to focus our resources on the development of momelotinib and potentially SRA737. We have no products approved for commercial sale and have not generated any revenue to date, and we continue to incur significant research and development and other expenses related to our ongoing operations. We expect to continue to incur significant losses for the foreseeable future, and we expect these losses to increase as we continue the development of momelotinib, fund research and preclinical studies and clinical trials, seek to identify additional product candidates, in-license additional products or technologies, seek regulatory approval, prepare for potential commercialization which will require a significant investment in areas related to contract manufacturing and inventory buildup and continue to operate as a public company.

Even if we succeed in commercializing momelotinib, or any future product candidates we may acquire or develop, we will continue to incur substantial research and development and other expenditures to develop and market these and other product candidates. We may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors that may adversely affect our business. The size of our future net losses will depend, in part, on the rate of future growth of our expenses and our ability to generate revenue. Our prior losses and expected future losses have had and will continue to have an adverse effect on our stockholders’ equity and working capital.

Our business is highly dependent on the success of momelotinib. If we are unable to successfully develop, obtain regulatory approval for and commercialize momelotinib, or experience significant delays in doing so, our business will be materially harmed.

Our business and future success depends on our ability to successfully develop, obtain regulatory approval for and commercialize momelotinib, a potent, selective and orally bioavailable JAK1, JAK2 and ACVR1 / activin receptor-like kinase-2 (ALK2) inhibitor. Momelotinib has been investigated in two completed Phase 3 trials for the treatment of myelofibrosis, and we launched our MOMENTUM Phase 3 clinical trial for momelotinib in the fourth quarter of 2019 after receiving regulatory feedback concerning the design of the trial.

While momelotinib is a late-stage product candidate for which previous Phase 3 clinical trial data suggest the potential to provide promising safety and efficacy in patients who are JAK inhibitor-naïve and in patients who have previously received a JAK inhibitor such as ruxolitinib, it may require additional clinical testing before we can seek regulatory approval and begin commercialization, if at

all. While the FDA has provided regulatory clarity concerning the design of MOMENTUM, our Phase 3 clinical trial for momelotinib, there is no guarantee that we will obtain regulatory approval and be able to begin commercialization. Before we can generate any revenue from sales of momelotinib, we must complete additional development activities, including the submission of marketing applications such as New Drug Applications (NDAs) or foreign equivalents, for regulatory review and approval in at least one jurisdiction, make substantial investments, obtain access to sufficient commercial manufacturing capacity and engage in significant marketing and commercial access efforts.

We cannot commercialize momelotinib in the United States without first obtaining regulatory approval from the FDA. Similarly, we cannot commercialize momelotinib outside of the United States without obtaining regulatory approval from similar regulatory authorities outside of the United States, such as the EMA in Europe and the Medicines and Healthcare products Regulatory Agency (MHRA) in the United Kingdom. Applications for regulatory approval and regulatory approval of momelotinib could be delayed or be denied for many reasons, including but not limited to the following:

Even if momelotinib were to be approved by the FDA or foreign regulatory authorities, any approval might contain significant limitations related to use restrictions for specified patient populations, age groups, warnings, precautions or contraindications, or may be subject to burdensome post-approval study or risk management requirements. If we are unable to obtain regulatory approval for momelotinib or any future product candidate in one or more jurisdictions, or if any approval contains significant limitations, we may not be able to obtain sufficient funding or generate sufficient revenue to continue the development, marketing or commercialization of momelotinib or any future product candidate. If competitive products developed by third parties show significant benefit in the indications in which we are developing momelotinib, any planned supportive or primary registration trials may be delayed, altered, terminated or not initiated and any future product candidates may never receive regulatory approval. Our clinical development programs for momelotinib or any future product candidates may also not receive regulatory approval if we have inadequate financial or other resources to advance these product candidates through the clinical trial process. Furthermore, even if we obtain regulatory approval for momelotinib or any future product candidates, we will still need to develop sales, marketing and commercialization infrastructure, or collaborate with a third party for the commercialization of such product candidates, establish commercially viable pricing and obtain approval for coverage and adequate reimbursement from third parties, including government payors. If we are unable to successfully commercialize momelotinib or any future product candidate, we may not be able to generate sufficient revenues to continue our business.

If further preclinical development or clinical trials of momelotinib, or any other future product candidates that we may develop or acquire fail to demonstrate acceptable safety and efficacy or do not otherwise produce positive results, we may incur additional costs or experience delays in completing, or ultimately be unable to complete, the development and commercialization of current or future product candidates.

Before obtaining marketing approval from regulatory authorities, including the FDA, for the sale of momelotinib or any future product candidates, we must complete preclinical development and conduct extensive clinical trials to demonstrate the safety and efficacy of such product candidates in humans.

The outcome of preclinical testing and early clinical trials may not be predictive of the success of later preclinical testing and clinical trials, and interim results of a clinical trial do not necessarily predict final results. Many companies in the biotechnology industry have suffered significant setbacks in later-stage clinical trials after achieving positive results in early-stage development, and there is a high failure rate for product candidates proceeding through clinical trials. Product candidates in later stages of clinical trials may fail to show the desired safety and efficacy traits despite having progressed through preclinical studies and initial clinical trials. For example, in June 2016, we announced that we decided to suspend the development of our former lead product candidate PNT2258 after an interim analysis of data from a Phase 2 clinical trial of PNT2258 indicated only modest efficacy. We cannot guarantee that we will be successful in obtaining the required efficacy and safety profile for momelotinib, or any future product candidate. A failure of one or more preclinical studies or clinical trials can occur at any stage of testing.

We previously acquired from Gilead momelotinib, a potent, selective and orally bioavailable JAK1, JAK2 and ACVR1/ALK2 inhibitor. Momelotinib has been investigated in two completed Phase 3 trials for the treatment of myelofibrosis, SIMPLIFY-1 and SIMPLIFY-2. Based on the results of the prespecified analyses, neither trial was considered sufficiently compelling to justify the submission of an application for regulatory approval. Although SIMPLIFY-1 met its primary efficacy endpoint of non-inferior spleen volume reduction, it did not meet its key secondary efficacy endpoint of non-inferior reduction in total symptom score; and although SIMPLIFY-2 did not meet its primary efficacy endpoint of superior reduction in spleen volume, it did meet its key secondary efficacy endpoint of superior reduction in total symptom score. In both SIMPLIFY studies, additional secondary endpoints related to transfusion independence rate, transfusion dependence rate, and rate of red blood cell transfusions all favored momelotinib over control and supported the potential for momelotinib to provide meaningful anemia benefits. Based on post hoc analyses of the data for these trials that we subsequently conducted, we believe the trials showed promising substantive spleen and constitutional symptom control. In addition, we believe momelotinib has the potential to provide a differentiated therapeutic profile encompassing anemia-related benefits. As such, we have determined that there is substantial clinical justification for further development of momelotinib. However, while we believe the safety and efficacy profile of momelotinib in patients with myelofibrosis appears promising based on the prior Phase 3 trial results, the MOMENTUM Phase 3 trial we commenced in those patients may not be successful. This could occur for a variety of reasons related to efficacy or safety outcomes observed in the trial or to issues related to study conduct or study feasibility, including, but not limited to the following:

Additionally, the results of MOMENTUM could be altered, or the trial results could be difficult to interpret, if there is inadvertent unblinding of the treatment assignment of subjects prior to the subject being evaluable for the primary efficacy endpoint or if too many subjects drop out of the study or discontinue the randomized study treatment prior to the subject being evaluable for the primary endpoint. Although danazol, the comparator selected for use in this trial, is not approved for the treatment of myelofibrosis, it is recommended by myelofibrosis guidelines as a treatment option for myelofibrosis associated anemia. Danazol’s ability to control myelofibrosis disease manifestations may not be sufficient, and thus subjects randomized to the danazol arm may experience symptomatic deterioration which may increase the risk of inadvertent unblinding, early study discontinuation and/or early discontinuation of randomized treatment. Similarly, momelotinib may also not sufficiently control myelofibrosis disease manifestations in all subjects randomized to the momelotinib arm, and thus subjects in either treatment arm may also be at risk for early discontinuation.

Moreover, preclinical and clinical data are often susceptible to varying interpretations and analyses, and even if the trials are successfully completed, we cannot guarantee that the FDA or foreign regulatory authorities will interpret the results as we do, and more trials could be required before we submit momelotinib for approval. Many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their products. To the extent that the results of our studies and trials are not satisfactory to the FDA or foreign regulatory authorities for support of a marketing application, approval of momelotinib may be significantly delayed, or we may be required to expend significant additional resources, which may not be available to us, to conduct additional trials in support of potential approval of momelotinib.

We may experience numerous unforeseen events during, or as a result of, preclinical studies and clinical trials that could delay or prevent our ability to receive marketing approval or commercialize momelotinib, including, but not limited to:

If we are required to conduct additional preclinical studies or clinical trials or other testing of momelotinib beyond those that we currently contemplate, if we are unable to successfully complete preclinical studies and clinical trials of momelotinib or other testing, or if the results of these studies, trials or tests do not reflect an acceptable safety or efficacy profile, we may:

Product development costs will also increase if we experience delays in testing or marketing approvals. We do not know whether any preclinical studies or clinical trials will continue as planned, will need to be restructured or will be completed on schedule, or at all. Significant preclinical studies and clinical trial delays also could allow our competitors to bring products to market before we do and could impair our ability to successfully commercialize momelotinib, any of which may harm our business and results of operations.

The outbreak of COVID-19, or similar public health crises, could have a material adverse impact on our business, financial condition and results of operations, including the execution of our clinical trials and the use and sufficiency of our existing cash.

The extent to which COVID-19 impacts our business and operating results will depend on future developments that are highly uncertain and cannot be accurately predicted, including new information that may emerge concerning COVID-19, the emergence of new variants and increased cases which has led to the reimplementation of restrictions in many areas and the actions to contain the virus or treat its impact.

For instance, our MOMENTUM Phase 3 clinical trial for momelotinib has been and may continue to be affected by the pandemic. We launched MOMENTUM in the fourth quarter of 2019 and ~~site initiation, participant recruitment and enrollment,~~ participant dosing, distribution of clinical trial materials, study monitoring and data analysis have been and may be delayed due to changes in hospital or university policies, federal, state or local regulations, prioritization of hospital resources toward pandemic efforts, or other reasons related to the pandemic. Additionally, some participants and clinical investigators may not be able to comply with clinical trial protocols. For example, quarantines or other travel limitations (whether voluntary or required) may impede participant movement, affect sponsor access to study sites, or interrupt healthcare services, and we may be unable to conduct our clinical trial. Any such delays to our planned MOMENTUM timeline could also impact the use and sufficiency of our existing cash reserves, and we may be required to raise additional capital earlier than we had previously planned. We may be unable to raise additional capital if and when needed, which may result in further delays or suspension of our development plans. Challenging and uncertain economic conditions can make capital raising costly and dilutive.

We currently utilize third parties to, among other things, manufacture raw materials, momelotinib and danazol (the comparator in the MOMENTUM trial), components, parts, and consumables, perform quality testing and distribute drug product. If either we or any third-party in the supply chain for materials used in the production of momelotinib or danazol, are adversely impacted by restrictions resulting from the COVID-19 pandemic, our supply chain may be disrupted, limiting our ability to source drug substance and drug product for our clinical trials.

Further, infections and deaths related to COVID-19 are disrupting certain healthcare and healthcare regulatory systems globally. Such disruptions could divert healthcare resources away from, or materially delay review by, the FDA and comparable foreign regulatory agencies. As a result of the FDA’s updated industry guidance for conducting clinical trials issued on March 18, 2020, we may be required to make certain adjustments to our clinical trials, which could delay the submission of our NDA and regulatory approval and increase our costs. It is unknown how long these disruptions could continue, were they to occur. Any elongation or de-prioritization of our clinical trial or delay in regulatory review resulting from such disruptions could materially adversely affect the development and study of momelotinib. COVID-19 may also impact the resources and the availability of FDA to provide feedback and regulatory review or to conduct pre-approval inspections on a timely basis, which will delay our regulatory approval and increase our costs.

In response to the COVID-19 pandemic, many of our employees continue their work outside of our office. In the event of a shelter-in-place order or other mandated local travel restrictions, third parties conducting clinical or manufacturing activities may not be able to access laboratory or manufacturing space, and our core activities may be significantly limited or curtailed, possibly for an extended period of time.

The spread of COVID-19, which has caused a broad impact globally, including restrictions on travel and quarantine policies put into place by businesses and governments, may have a material adverse effect on our business. While the potential economic impact brought by and the duration of the pandemic may be difficult to assess or predict, it has already caused, and is likely to result in further, significant disruption of global financial markets and the trading prices for our common stock and other biopharmaceutical companies have been highly volatile as a result of the COVID-19 pandemic, which may reduce our ability to access capital either at

all or on favorable terms. In addition, a recession, depression or other sustained adverse market event resulting from the global effort to control COVID-19 infections could materially and adversely affect our business and the value of our common stock.

The ultimate impact of the current pandemic, or any other health epidemic, is highly uncertain and subject to change. We do not yet know the full extent of potential delays or impacts on our business, our clinical trials, healthcare systems or the global economy as a whole. However, these effects could have a material adverse impact on our operations, and we will continue to monitor the situation closely. To the extent the COVID-19 pandemic adversely affects our business and financial results, it may also have the effect of heightening many of the other risks described in this “Risk Factors” section.

If we encounter difficulties enrolling patients in future clinical trials, our clinical development activities could be delayed or otherwise adversely affected.

Although we have completed enrollment for our Phase 3 MOMENTUM clinical trial, we may experience difficulties in patient enrollment in any future clinical trials for a variety of reasons. The timely completion of clinical trials in accordance with their protocols depends, among other things, on our ability to enroll a sufficient number of patients who remain in the trial until its conclusion. The enrollment of patients depends on many factors, including, but not limited to:

Our future clinical trials may compete with other clinical trials for product candidates that are in the same therapeutic areas as momelotinib. This competition reduces the number and types of patients and qualified clinical investigators available to us, because some patients who might have opted to enroll in our trials may instead opt to enroll in a trial being conducted by one of our competitors or clinical trial sites may not allow us to conduct our clinical trial at such site if competing trials are already being conducted there. Since the number of qualified clinical investigators is limited, we expect to conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which will reduce the number of patients who are available for our clinical trials in such clinical trial site. We may also encounter difficulties finding a clinical trial site at which to conduct our trials. Moreover, potential patients and their doctors may be inclined to use conventional therapies, such as chemotherapy, radiation and other approved therapies, rather than enroll patients in any one of our clinical trials. Global pandemics, such as COVID-19, have negatively affected site initiation, as well as recruitment and retention, at sites in regions or cities whose health care system have become overwhelmed due to the pandemic. For example, as a result of COVID-19, several of our clinical trial sites have paused enrollment or are not prioritizing clinical trial activities or allowing enrollment, and of those sites still conducting clinical trial activities, the availability for patients to visit sites and have screening conducted may be limited. We may also experience delays or pauses in the delivery of required site activity equipment.

Delays in patient enrollment may result in increased costs or may affect the timing or outcome of our planned clinical trials, which could prevent completion of these clinical trials and adversely affect our ability to advance the development of momelotinib or any future product candidates we may develop.

Our ability to continue as a going concern will require us to obtain capital to complete the development and commercialization of momelotinib and any future product candidates.

We expect to spend substantial capital to advance momelotinib or any future product candidates, in preclinical and clinical development, seek regulatory approvals for such product candidates, establish a commercial sales force to market and manufacture

products, if any, that are approved for commercial sale. We also incur significant compliance and administrative costs as a result of operating as a public company.

Our future capital requirements will depend on many factors, including, but not limited to:

Identifying potential product candidates and conducting preclinical studies and clinical trials is a time-consuming, expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve drug sales. In addition, momelotinib, if approved, may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of momelotinib, if approved, which we do not expect to be commercially available for many years, if at all. Accordingly, we will need to continue to rely on additional financing to achieve our business objectives.

We cannot be certain that additional funding will be available on acceptable terms, or at all. We have no committed source of additional capital, other than our outstanding warrants, and it may be difficult to raise the amount of capital needed to support planned development of momelotinib. If we are unable to raise additional capital in sufficient amounts or on terms acceptable to us, we may have to significantly delay, scale back or discontinue the development or commercialization of momelotinib or other research and development initiatives. In particular, we do not have sufficient funds on hand to adequately prepare for future momelotinib commercialization, if approved. We could also be required to seek collaborators for momelotinib, at an earlier stage than otherwise would be desirable or on terms that are less favorable than might otherwise be available or relinquish or license on unfavorable terms our rights to such product candidates in markets where we otherwise would seek to pursue development or commercialization ourselves. We also may be unable to acquire additional promising product candidates.

We have acquired momelotinib from a third party that had already conducted or was in the process of conducting clinical trials. Our acquisition of momelotinib has resulted in us being required to take over responsibility for conducting ongoing momelotinib trials. We may discover that development efforts of the third parties, including but not limited to historical studies and trials conducted by third parties, did not comply with all applicable rules and regulations. Further development and commercialization of momelotinib will require significant financial and operational resources from us.

Prior to our acquisition of momelotinib, third parties had been responsible for all development activities including, drug process, preclinical and clinical development activities, submission of CTAs and INDs, development of the trial protocols, establishment and management of clinical and safety databases, submission of a pediatric investigation plan (PIP), and other activities. Although we believe the historical development activities were conducted in accordance with applicable rules and regulations in material respects, we cannot assure you that we will not discover inaccuracies or noncompliance in prior development activities that have an adverse effect on the future development of momelotinib. For example, a regulatory authority may choose to inspect an investigational site and/or vendor such as a CRO for a momelotinib study that was previously conducted by Gilead such as the SIMPLIFY-1 or SIMPLIFY-2 studies. Findings from such inspections could have an impact on the review of any future marketing applications by the FDA or foreign regulatory authorities.

In connection with our acquisition of momelotinib, we have assumed the responsibility for ongoing clinical studies with momelotinib, including related expenses and manufacturing and regulatory activities, which were previously managed and funded by Gilead. This includes responsibility for the ongoing extended access study, which provides extended access of momelotinib to certain patients previously enrolled in Gilead-sponsored studies, who are currently receiving treatment with momelotinib and have not experienced progression of disease. Further, extended access programs provide supportive safety information for regulatory review. Any adverse events or reactions experienced by subjects in the extended access program may be attributed to momelotinib and may limit our ability to obtain regulatory approval with labeling that we consider desirable, or at all.

From time to time we may amend the clinical protocols for momelotinib to include additional objectives that could yield important scientific information critical to our overall development strategy. The protocol amendment process requires review and approval by several review bodies, including regulatory agencies and scientific, regulatory and ethics boards. These protocol amendments may not be accepted by the review bodies in the form submitted, or at all, which may delay our planned enhancements to the clinical development program and/or limit or change the type of information we may gather from those studies.

While regulatory feedback was obtained concerning the design of our Phase 3 clinical trial for momelotinib from both the United States and European Union regulatory authorities, additional regulatory, scientific, ethics committee, and possibly other reviews will be required during the activation process for the MOMENTUM Phase 3 trial before the protocol is active at any particular site. It is possible that these reviews could require changes to the design of the study. If the FDA, EMA, MHRA, an ethics committee or scientific review board, or another regulatory authority objects to or otherwise does not accept or approve any future protocols or protocol amendments or requires us to further modify trial protocols, our related planned clinical development program may be delayed or suspended and/or we may not be able to gather information we think would be useful to advance development of momelotinib, and our development program may be adversely affected.

Raising additional capital may cause dilution to our existing stockholders, restrict our operations or require us to relinquish rights to our technologies or momelotinib.

We may seek additional capital through a combination of public and private equity offerings, debt financings, strategic partnerships and alliances and licensing arrangements. In November 2019 we conducted a public equity offering where we raised net proceeds of approximately $97.7 million in a substantially dilutive transaction to our pre-existing investors. In August 2020, we filed a prospectus supplement pursuant to which we issued and sold $20.0 million of our common stock. In February 2021, we filed a prospectus supplement pursuant to which we can issue and sell an aggregate of up to $30.0 million of our common stock from time to time in ATM offerings. In addition, on May 7, 2021, we filed a prospectus supplement, pursuant to which we can issue and sell an aggregate of up to an additional $50.0 million of our common stock from time to time in the ATM offerings. As of ~~June~~September 30, 2021, we sold ~~1,882,572~~3,990,037 shares under the ATM program (including the amounts sold under the prospectus supplement filed in August 2020) for net proceeds of ~~$28.5~~$64.3 million, net of commissions and offering expenses. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interests of our stockholders will be further diluted, and the terms may include liquidation or other preferences that adversely affect the rights of our stockholders. The incurrence of indebtedness would result in increased fixed payment obligations and could involve certain restrictive covenants, such as limitations on our ability to incur additional debt, limitations on our ability to acquire or license intellectual property rights and other operating restrictions that could adversely impact our ability to conduct our business. If we raise additional funds through strategic partnerships and alliances and licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies or momelotinib or grant licenses on terms unfavorable to us.

We may expend our limited resources to pursue a particular product candidate, such as momelotinib, and fail to capitalize on product candidates that may later prove to be more profitable or for which there is a greater likelihood of success. In addition, we

may intentionally halt or terminate programs in order to conserve capital and focus on our remaining program or programs, which may increase our reliance on those programs to be successful.

Because we have limited financial and managerial resources, we focus our research and development efforts on our product candidate, momelotinib. As a result, we may advertently or inadvertently forgo or delay pursuit of opportunities with other product candidates, including SRA737, that later prove to have greater commercial potential. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our spending on current and future research and development programs and product candidates for specific indications may not yield any commercially viable product candidates. In addition, if we halt or terminate programs in order to conserve capital and focus on our remaining program or programs, it may increase our reliance on the success of such programs and raise our exposure to the risk of failure among any of our programs.

While we have currently deprioritized development of SRA737, we are exploring options for future development of this product candidate, if any. However, there can be no assurance that we will successfully obtain development support or the funding necessary to advance SRA737 on commercially reasonable terms, or at all. If we are unable to obtain such support or funding, we may need to permanently cease development of SRA737.

If we do not achieve our projected development goals in the timeframes we announce and expect, our stock price may decline.

From time to time, we estimate the timing of the anticipated accomplishment of various scientific, clinical, regulatory and other product development goals, which we sometimes refer to as milestones. These milestones may include the commencement or completion of scientific studies and clinical trials and the submission of regulatory filings. From time to time, we may publicly announce the expected timing of some of these milestones. All of these milestones are and will be based on numerous assumptions. The actual timing of these milestones can vary dramatically compared to our estimates, in some cases for reasons beyond our control. If we do not meet these milestones as publicly announced, our stock price may decline.

We may form or seek strategic alliances, licensing arrangements or other collaborations in the future or enter into a strategic transaction. We may be unable to form or enter into such alliances or arrangements, and we may not realize the expected benefits of any such transaction.

We evaluate strategic alliances or licensing arrangements, joint ventures or collaborations with third parties and other strategic transactions from time to time including those that will complement or augment our development and commercialization efforts with respect to momelotinib and any future product candidates that we may acquire or develop, or that may provide for other economic value.

For example, in August 2021, we entered into a license agreement with AstraZeneca for an exclusive global license for ~~AZD5153~~SRA515 and related compounds. Such license agreement imposes specified diligence, milestone payment, royalty, commercialization, development and other obligations on us and require us to meet development timelines, or to exercise diligent or commercially reasonable efforts to develop and commercialize licensed products, in order to maintain the license. AstraZeneca has the right to terminate a license if we materially breach the agreement and fail to cure such breach within a specified period, in the event of certain patent challenges or in the event we undergo certain bankruptcy events. In spite of our best efforts, our current or any future licensors might conclude that we have materially breached our license agreements and might therefore terminate the license agreements. If our license agreements are terminated, we may lose our rights to develop and commercialize product candidates and technology, lose patent protection, experience significant delays in the development and commercialization of our product candidates and technology, and incur liability for damages. If these in-licenses are terminated, or if the underlying intellectual property fails to provide the intended exclusivity, our competitors or other third parties could have the freedom to seek regulatory approval of, and to market, products and technologies identical or competitive to ours and we may be required to cease our development and commercialization of certain of our product candidates and technology. In addition, we may seek to obtain additional licenses from our licensors and, in connection with obtaining such licenses, we may agree to amend our existing licenses in a manner that may be more favorable to the licensors, including by agreeing to terms that could enable third parties, including our competitors, to receive licenses to a portion of the intellectual property that is subject to our existing licenses and to compete with any product candidates we may develop and our technology. Any of the foregoing could have a material adverse effect on our competitive position, business, financial condition, results of operations and prospects. Disputes may arise between us and our licensors regarding intellectual property rights subject to a license agreement, including:

We are generally also subject to all of the same risks with respect to protection of intellectual property that we license as we are for intellectual property that we own. If we or our licensor fail to adequately protect this intellectual property, our ability to develop, manufacture or commercialize products could suffer.

If disputes over intellectual property rights that we have licensed prevent or impair our ability to maintain our current licensing arrangements on acceptable terms, our business, results of operations, financial condition, and prospects may be adversely affected.

In June 2020, we licensed SRA141 back to Carna Biosciences, the original licensor. We may be entitled to certain profit share on royalty and non-royalty income and royalties on product sales. If Carna Biosciences or its collaborators fail to successfully develop and commercialize SRA141, we will receive limited to no value from this transaction. In September 2016, we entered into an exclusive license agreement with CRT Pioneer Fund LP (CPF) for worldwide rights, know-how and materials to develop SRA737, a small molecule inhibitor targeting Chk1, a promising therapeutic target to treat cancer. If we fail to meet our diligence and other obligations under the license agreement, we could lose our rights to this technology. These licensing agreements or any future strategic transactions and relationships may require us to incur non-recurring and other charges, increase our near and long-term expenditures, issue securities that dilute our existing stockholders, disrupt our management and business, forego potential future economic value or result in the loss of strategic value. These transactions and relationships also may result in a delay in the development of momelotinib or any future product candidates if we become dependent upon the other party and such other party does not prioritize the development of such product candidates relative to its other development activities.

In addition, we face significant competition in seeking appropriate strategic partners and the negotiation process is time-consuming and complex. Moreover, we may not be successful in our efforts to establish a strategic partnership or other alternative arrangements for momelotinib because it may be deemed to be at too early of a stage of development for collaborative effort or third parties may not view momelotinib as having the requisite potential to demonstrate safety and efficacy. We cannot be certain that, following a strategic transaction or license, we will achieve the revenue or specific net income that would justify such transaction.

Past and future acquisitions could disrupt our business and harm our financial condition and operating results.

We evaluate additional businesses or product candidates from third parties that we believe will complement or augment our existing momelotinib program. For example, in August 2018, we entered into an Asset Purchase Agreement with Gilead whereby we acquired worldwide rights to the pharmaceutical product momelotinib, an investigational orally bioavailable JAK1, JAK2 and ACVR1/ALK2 inhibitor together with all related intellectual property rights and certain other related assets. Even if the assets we acquire have promising markets or technologies, we may not be able to realize the benefit of acquiring such assets if we are unable to successfully integrate them with our existing operations and company culture. We may encounter numerous difficulties in developing, manufacturing and marketing any new product candidates resulting from an acquisition, including momelotinib, which may delay or prevent us from realizing their expected benefits or enhancing our business. We cannot assure you that, following any such acquisition, we will achieve the expected synergies or benefits from the asset to justify the transaction. The risks we face in connection with strategic transactions, including our acquisition of momelotinib, include, but are not limited to:

Our failure to address these risks or other problems encountered in connection with acquisitions could cause us to fail to realize the anticipated benefits of these transactions, cause us to incur unanticipated liabilities and harm the business generally. There is also a risk that future acquisitions will result in the incurrence of debt, contingent liabilities, amortization expenses or incremental operating expenses, any of which could harm our financial condition or operating results.

The manufacture of momelotinib and the comparator, danazol requires outsourced, custom manufacturing and we may encounter difficulties in production, particularly with respect to formulation, process development or scaling up of our manufacturing capabilities. If our third-party manufacturers or suppliers encounter such difficulties, our ability to provide supply of momelotinib for preclinical studies, clinical trials or our products for patients, if approved, or danazol for the MOMENTUM trial could be delayed or stopped, or we may be unable to maintain a commercially viable cost structure.

As product candidates are developed, it is common that various aspects of the development program, such as manufacturing methods, are altered along the way in an effort to optimize processes and results. Such changes carry the risk that they will not achieve these

intended objectives, and any of these changes could cause momelotinib to perform differently and affect the results of planned preclinical studies or future clinical trials.

Currently, momelotinib is manufactured using an optimized drug substance process by third-party manufacturers. If either we or any third-party in the supply chain for materials used in the production of momelotinib are adversely impacted by restrictions resulting from the COVID-19 outbreak, our supply chain may be disrupted, limiting the ability of our third-party manufacturers to manufacture momelotinib for our clinical trials.

Supply chain logistics are complex for the MOMENTUM Phase 3 clinical trial of momelotinib, as it requires the administration of both an active drug (momelotinib) and a comparator (danazol) and there are risks associated with this process throughout the supply chain, from manufacturing, labeling, to distribution, dispensing, and administration. Although we have secured sufficient quantities of drug substance and drug product to supply our current momelotinib program, starting with the MOMENTUM Phase 3 clinical trial of momelotinib, we will need to obtain additional supplies from third-party manufacturers that we have engaged, or expect to engage. We have also secured sufficient quantities of danazol drug product to supply the comparator for the initial subjects who will enroll in the study. However, over-encapsulation of this material will be necessary in the future in order to complete the MOMENTUM Phase 3 clinical trial. We are also working with regulatory agencies to extend the shelf life of our current supply of danazol to ensure that our current supply will not expire before we complete our Phase 3 clinical trial. While we are taking multiple measures to ensure sufficient supply of danazol required to complete the Phase 3 trial, we could nevertheless face challenges that potentially impact the ability to execute and complete the MOMENTUM trial as we anticipate. Any shortage in the clinical supplies could delay our clinical trial plan.

Furthermore, if third-party manufacturers of danazol, or any third-party in the supply chain, are adversely impacted by restrictions resulting from the COVID-19 outbreak, we may be unable to secure the supply required for our MOMENTUM study. Any potential limitation in supply of either momelotinib or danazol during the conduct of the MOMENTUM trial could be exacerbated due to the use of several regional depots and the number of sites that are participating in the study. Drug is shipped to sites as they enter a patient into screening. If the rate of screening exceeds expectations, there could be logistic challenges in refilling the supply at the depot. Although additional drug product could be shipped from another regional depot, logistic challenges could delay this as well. If the supply in a regional depot becomes depleted, screening in that region might need to be temporarily suspended until the supply is replenished. Although we are working to develop commercially viable manufacturing processes, doing so is a difficult and uncertain task, and there are risks associated with scaling to the level required for advanced clinical trials or commercialization, including, among others, cost overruns, potential problems with process scale up or formulation, process reproducibility, stability issues, lot consistency and timely availability of reagents or raw materials.

Any of these challenges could delay completion of preclinical studies or clinical trials, require bridging studies or trials, or the repetition of one or more studies or trials, increase development costs, delay approval of momelotinib, impair commercialization efforts, increase our cost of goods and have an adverse effect on our business, financial condition, results of operations and growth prospects.

Our reliance on third-party manufacturing partners or suppliers may cause our supply of research and development, preclinical and clinical development materials to become limited or interrupted or fail to be of satisfactory quantity or quality.

We do not have any manufacturing facilities or personnel. We currently rely, and expect to continue to rely, on third parties for the manufacture and supply of preclinical study and clinical trial materials in relation to momelotinib and SRA515, including materials for any combination trials that we may undertake, and any future potential product candidates that we may develop for preclinical and clinical testing, as well as for commercial manufacture if momelotinib receives marketing approval. We have engaged, or expect to engage, third-party manufacturers to obtain materials and consumables necessary for the manufacture of momelotinib.

We may be unable to establish further agreements with third-party manufacturers and suppliers or to do so on acceptable terms. Even if we are able to establish agreements with third-party manufacturers, reliance on third-party manufacturers and suppliers entails additional risks, including, but not limited to:

While we require our third-party manufacturers and suppliers to comply with cGMPs in the manufacture of clinical trial materials and commercial supply, should we obtain approval of momelotinib, these third-party manufacturers and suppliers may cease to continue to comply with cGMPs—which are FDA requirements for ensuring product quality control—or similar regulatory requirements outside the United States. Our contract manufacturers and suppliers are subject to continual review and periodic inspections to assess compliance with cGMPs. Accordingly, although we are not involved in the day-to-day operations of our contract manufacturers or suppliers, we are ultimately responsible for ensuring that our products and product candidates, and any other materials that may be used in our preclinical or clinical studies or trials, are manufactured or supplied in accordance with cGMPs. Therefore, we and others with whom we work must continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production, quality control and quality assurance. Our failure, or the failure of our third-party manufacturers or suppliers, to comply with applicable regulations could result in momelotinib not being approved or sanctions being imposed on us, including fines, injunctions, civil penalties, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of momelotinib or approved products, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect supplies of our medicines and harm our business and results of operations.

Additionally, our third-party manufacturers may experience manufacturing difficulties due to resource constraints or as a result of labor disputes, or unstable political environments, or medical pandemics such as the COVID-19 outbreak. For example, many of our raw materials for manufacture of momelotinib are produced in Asia which could impact our ability to manufacture and supply material for clinical and commercial supply. If our contract manufacturers were to encounter any manufacturing difficulties or delays due to these factors, our ability to provide momelotinib to patients in clinical trials, or to provide product for treatment of patients once approved, would be jeopardized.

We rely on third-party suppliers for the supply of the raw materials required for the production of our product candidates, and we expect to some extent continue to rely on third-party manufacturers for the commercial supply of any of our product candidates for which we obtain marketing approval. Our dependence on these third-party suppliers and the challenges we may face in obtaining adequate supplies of raw materials involve several risks, including limited control over pricing, availability, quality, and delivery schedules and non-exclusivity. As a small company, our negotiation leverage is limited, and we are likely to get lower priority than our competitors who are larger than we are. We do not have long-term supply agreements, and we purchase our required supplies on a development manufacturing services agreement or purchase order basis. We cannot be certain that our suppliers will continue to provide us with the quantities of these raw materials that we require to satisfy our anticipated specifications and quality requirements. Any supply interruption in limited or sole sourced raw materials could materially harm our ability to manufacture our product candidates until a new source of supply, if any, could be identified and qualified. We may be unable to find a sufficient alternative supply channel in a reasonable time or on commercially reasonable terms. Any performance failure on the part of our suppliers could delay the development and potential commercialization of our product candidates, including limiting supplies necessary for clinical trials and regulatory approvals, which would have a material adverse effect on our business.

Any performance failure on the part of our existing or future manufacturers or suppliers, any interruption or poor yield or quality of manufactured or supplied materials, or any interruption or delay caused by a third party being subject to governmental regulations or moratoriums could result in additional costs, not having sufficient quantities or sufficient quality and may delay, prevent or impair our development, commercialization or marketing efforts. We do not currently have arrangements in place for redundant supply. If any one of our current contract manufacturers or suppliers cannot perform as agreed, we may be required to replace that manufacturer or supplier. Although we believe that there are several potential alternative manufacturers or suppliers who could manufacture or supply momelotinib or the materials for trials relating to momelotinib, we may incur added costs and delays in identifying and qualifying any such replacement.

If our third-party manufacturers or suppliers use hazardous and biological materials in a manner that causes injury or violates applicable law, we may be liable for damages. Our research and development activities involve the controlled use of potentially hazardous substances, including chemical and biological materials, by our third-party manufacturers or suppliers. Our manufacturers and suppliers are subject to federal, state and local laws and regulations in the United States governing the use, manufacture, storage, handling and disposal of medical and hazardous materials. Although we believe that our manufacturers’ and our suppliers’ procedures for using, handling, storing and disposing of these materials comply with legally prescribed standards, we cannot completely eliminate the risk of contamination or injury resulting from medical or hazardous materials. As a result of any such contamination or injury, we may incur liability or local, city, state or federal authorities may curtail the use of these materials and interrupt our business operations. In the event of an accident, we could be held liable for damages or penalized with fines, and the liability could exceed our resources.

We do not have any insurance for liabilities arising from medical or hazardous materials. Compliance with applicable environmental laws and regulations is expensive, and current or future environmental regulations may impair our research, development and production efforts, which could harm our business, prospects, financial condition or results of operations.

Thus, our current and anticipated future dependence upon others for the manufacture or supply of momelotinib or related medicines and materials may adversely affect our development timeline, our future profit margins or our ability to commercialize momelotinib or any future product candidates that receive marketing approval on a timely and competitive basis.

Our product candidates including momelotinib may cause undesirable side effects or have other properties that could halt their development, prevent their regulatory approval, limit their commercial potential or result in significant negative consequences.

It is possible that the FDA or foreign regulatory authorities may not agree with any assessment of the safety profile of momelotinib. Undesirable side effects caused by momelotinib could cause us, IRBs, our CROs, the FDA or foreign regulatory authorities to interrupt, delay or discontinue development and could result in a clinical hold on any clinical trial, or the denial of regulatory approval by the FDA or foreign regulatory authorities for any or all targeted indications. This, in turn, could prevent us from commercializing momelotinib and generating revenues from their sale. In addition, if any of our products cause serious or unexpected side effects or are associated with other safety risks after receiving marketing approval, a number of potential significant negative consequences could result, including, but not limited to:

If our clinical data demonstrates that momelotinib has an unfavorable safety profile and is unlikely to receive regulatory approval or be successfully commercialized, we may voluntarily suspend or terminate future development of momelotinib.

Any one or a combination of these events could prevent us from obtaining approval and achieving or maintaining market acceptance of the affected product or could substantially increase the costs and expenses of commercializing momelotinib, which in turn could delay or prevent us from generating significant revenues from the sale of the product.

We do not have our own laboratory facilities. We rely on third parties to conduct our preclinical studies and clinical trials. If these third parties do not successfully carry out their contractual duties or meet expected deadlines, we may not be able to obtain regulatory approval of or commercialize momelotinib.

We do not have our own laboratory facilities. We depend upon independent investigators and collaborators, such as universities, medical institutions, CROs and strategic partners to conduct our preclinical studies and clinical trials. We expect to have to negotiate budgets and contracts with CROs and trial sites, which may result in delays to our development timelines and increased costs. We will rely heavily on these third parties over the course of our preclinical studies and clinical trials, and we control only certain aspects of their activities. Nevertheless, we are responsible for ensuring that each of our studies is conducted in accordance with applicable protocol, legal, regulatory and scientific standards, and our reliance on third parties does not relieve us of our regulatory responsibilities. We and these third parties are required to comply with GCPs and GLPs, which are regulations and guidelines enforced by the FDA and comparable foreign regulatory authorities for clinical and non-clinical research intended to support a submission or application to FDA or the comparable foreign authority. Regulatory authorities enforce these requirements through periodic inspections of trial sponsors, principal investigators and trial sites. If we or any of these third parties fail to comply with applicable requirements, the data generated in our studies and trials may be deemed unreliable and the FDA or foreign regulatory authorities may require us to perform additional studies or trials before approving our marketing applications. We cannot assure you that, upon inspection, such regulatory authorities will determine that any of our studies or trials comply with the GCP or GLP

requirements. In addition, our studies and trials must be conducted with drug product produced under cGMPs. Our failure or any failure by these third parties to comply with these regulations or to recruit a sufficient number of patients may require us to repeat studies or trials, which would delay the regulatory approval process. Moreover, our business may be implicated if any of these third parties violates federal or state fraud and abuse or false claims laws and regulations or healthcare privacy and security laws.

Any third parties conducting our preclinical studies and clinical trials will not be our employees and, except for remedies available to us under our agreements with such third parties, we cannot control whether or not they devote sufficient time and resources to our ongoing preclinical, clinical and nonclinical programs. These third parties may also have relationships with other commercial entities, including our competitors, for whom they may also be conducting clinical studies or other drug development activities, which could

affect their performance on our behalf. If these third parties do not successfully carry out their contractual duties or obligations or meet expected deadlines, if they need to be replaced or if the quality or accuracy of the data they obtain is compromised due to the failure to adhere to our protocols or regulatory requirements or for other reasons, our studies and trials may be extended, delayed or terminated and we may not be able to complete development of, obtain regulatory approval of or successfully commercialize momelotinib. As a result, our financial results and the commercial prospects for momelotinib would be harmed, our costs could increase and our ability to generate revenue could be delayed.

We may be required to suspend, repeat or terminate our clinical trials if they are not conducted in accordance with regulatory requirements, the results are negative or inconclusive, or the trials are not well-designed.

Regulatory agencies, IRBs or data safety monitoring boards may at any time recommend the temporary or permanent discontinuation of our clinical trials or request that we cease using investigators in the clinical trials if they believe that the clinical trials are not being conducted in accordance with applicable regulatory requirements, or that they present an unacceptable safety risk to participants. Clinical trials must be conducted in accordance with GCPs, or other applicable foreign regulatory authority guidelines. Clinical trials are subject to oversight by the FDA, foreign regulatory authorities and IRBs at the study sites where the clinical trials are conducted. In addition, clinical trials must be conducted with product candidates produced in accordance with applicable cGMPs. Clinical trial data may be rejected by the FDA or foreign regulatory authorities or clinical trials may be suspended by the FDA, foreign regulatory authorities, or us for various reasons, including, but not limited to:

Although we have never been asked by a regulatory agency, IRB or data safety monitoring board to temporarily or permanently discontinue a clinical trial, if we elect or are forced to suspend or terminate a clinical trial of momelotinib or any future product candidates, the commercial prospects for that product will be harmed and our ability to generate product revenue from that product may be delayed or eliminated. For example, in June 2016, we decided to suspend the development of our former lead product candidate PNT2258 after an interim analysis of data from a Phase 2 clinical trial on PNT2258 indicated only modest efficacy. Furthermore, any of these events could prevent us or our partners from achieving or maintaining market acceptance of the affected product and could substantially increase the costs of commercializing momelotinib and impair our ability to generate revenue from the commercialization of these products either by us or by our collaboration partners.

Even if we receive regulatory approval to market momelotinib, the market may not be receptive to our product.

Even if we obtain regulatory approval for momelotinib, it may not gain market acceptance among physicians, patients, healthcare payors and/or the medical community. We believe that the degree of market acceptance will depend on a number of factors, including, but not limited to:

If momelotinib is approved for commercial sale and fails to achieve market acceptance, we may not be able to generate significant revenue or achieve or sustain profitability.

We may be subject to requests for access to momelotinib. Demand for compassionate use of our unapproved therapies could strain our resources, delay our drug development activities, negatively impact our regulatory approval or commercial activities, and result in losses.

We are developing momelotinib to treat a life-threatening illness for which there are currently limited therapeutic options. Other companies in our field have been the target of campaigns requesting access to unapproved drugs. If we experience similar request for access campaigns, we may experience significant disruption to our business which could result in losses. We are a small company with limited resources, and any unanticipated trials or access programs resulting from requests for access could deplete our drug supply, increase our capital expenditures, reduce the availability of potentially eligible clinical trial participants, and otherwise divert our resources from our primary goals.

In addition, legislation referred to as "Right to Try" laws have been introduced at the local and national levels, which are intended to give patients access to unapproved therapies. New and emerging legislation regarding expanded access to unapproved drugs for life-threatening illnesses could negatively impact our business in the future. Either activism or legislation related to requests for access may require us to initiate an unanticipated expanded access program or to make momelotinib more widely available sooner than anticipated.

Patients who receive access to unapproved drugs through compassionate use or expanded access programs have life-threatening illnesses and generally have exhausted all other available therapies. The risk for serious adverse events, including those which may be unrelated to momelotinib, in this patient population is high and could have a negative impact on the safety profile of momelotinib, which could cause significant delays or an inability to successfully commercialize momelotinib and could materially harm our business. In addition, in order to perform the controlled clinical trials required for regulatory approval and successful commercialization of momelotinib, we may receive adverse publicity or experience other disruptions if we do not provide compassionate use access or expanded access programs in response to requests for access from patients in the US or elsewhere in the world. Should we agree to provide compassionate use access or decide to initiate an expanded access program, we could experience adverse publicity or other disruptions related to current or potential participants in such programs. Similarly, we could experience adverse publicity or other disruptions if we were to restructure or pause any compassionate use and/or expanded access program after initiating such a program or after the provision of our product through compassionate access to an individual patient or patients.

We do not have our own laboratory facilities or the ability to discover product candidates. We rely on licensing, acquisition and other forms of strategic relationship to grow our pipeline. Our efforts to acquire additional product candidates and grow our pipeline may be unsuccessful.

We do not have our own laboratory facilities or the ability to discover product candidates. We rely on licensing, acquisition and other forms of strategic relationships to grow our pipeline. We may acquire, or enter into strategic relationships to identify, license and develop, one or more additional product candidates to grow our pipeline. In addition, we may desire to renegotiate our currently existing licensing or asset purchase agreements for any of our product candidates. The identification, evaluation, development and potential acquisition or licensing of additional product candidates is expensive and time-consuming, and our efforts may not lead to the acquisition or licensing of any additional product candidates, that can be successfully developed and commercialized. Competition for viable product candidates is intense, and the acquisition or licensing of product candidates may be more expensive than we are able to afford or may require us to seek additional financing. If our efforts do not lead to the acquisition or successful identification, development and licensing of suitable product candidates, we may be unable to grow our pipeline. In addition, if our efforts to grow our pipeline require us to pursue additional dilutive capital or debt financing strategies, we may experience harm to our financial position and stability.

Even if we are successful in continuing to build our pipeline, the potential product candidates that we identify may not be suitable for clinical development. For example, they may be shown to have harmful side effects or other characteristics that indicate that they are unlikely to be drugs that will receive marketing approval and achieve market acceptance. If we do not successfully develop and commercialize product candidates based upon our approach, we will not be able to obtain product revenue in future periods, which likely would result in significant harm to our financial position and adversely affect our stock price.

We face significant competition from other hematology and oncology companies, and our operating results will suffer if we fail to compete effectively.

The hematology and oncology industries are characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary products. We may face potential competition from many different sources, including major pharmaceutical, specialty pharmaceutical and biotechnology companies, academic institutions and governmental agencies and public and private research institutions. Any product candidates that we successfully develop and commercialize will compete with existing therapies

that are available for the indication or indications for which they are approved and new therapies that may become available in the future.

To our knowledge, there are currently two approved myelofibrosis drugs that specifically rely on JAK inhibition, ruxolitinib, marketed by Incyte Corporation as Jakafi® in the United States and by Novartis as Jakavi in the rest of the world and fedratinib, marketed by Celgene Corporation as Inrebic® in the United States. Fedratinib was also recently approved in Europe. In addition, there is one additional JAK inhibitor competitor in clinical development, at a similar state of development or more advanced than us. CTI Biopharma Corporation is developing pacritinib, for a subset of myelofibrosis patients with platelet counts less than 50,000/uL and finalized its rolling NDA submission in March 2021. However, to our knowledge, there are no drugs that target JAK1, JAK2 and ACVR1/ALK2 on the market, nor in development. Other competitors developing myelofibrosis therapeutics include Acceleron, Constellation Pharma, AbbVie, Kartos and Incyte. Celgene and Acceleron are developing luspatercept in a Phase 3 clinical trial for myelofibrosis. Luspatercept was recently added to the NCCN guidelines as a potential option for managing the anemia associated with myelofibrosis. Constellation Pharma is developing pelabresib (CPI-0610), a BET inhibitor in Phase 3 clinical trial in combination with ruxolitinib. AbbVie announced two Phase 3 clinical trials in combination with ruxolitinib for JAKi naïve and previously JAKi treated patients. Kartos announced clinical trial plans for KRT-232, a MDM2 inhibitor for JAKi relapsed or refractory MF patients. Incyte launched Phase 3 clinical trials to evaluate parsaclisib, in combination with ruxolitinib. In addition, there are several Phase 1 and Phase 2 clinical trials being conducted in myelofibrosis by various companies, including a Phase 2 study of a deuterated form of momelotinib being run by Zelgen Biopharmaceuticals in China. Several additional companies are advancing assets in the early stages of development potentially for the myelofibrosis market. If momelotinib is approved, it will compete with existing therapies for the indication or indications for which it is approved. While we believe that momelotinib may have the ability to provide an anemia benefit in addition to treating the other manifestations of myelofibrosis, which we believe is unique within the JAK inhibitor class of agents, the market for momelotinib is competitive, and physicians and other prescribers may not recommend or prescribe momelotinib over competing products.

Many of the companies against which we may compete have significantly greater financial and other resources and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals and marketing approved products than we do. Mergers and acquisitions in the hematology and oncology industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel and establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or that may be necessary for, our momelotinib program. Development efforts and clinical results of other companies may be unsuccessful or terminated, which could result in a negative perception of momelotinib, decreases in our stock price and adverse regulatory impacts, which could have a material and adverse effect on our ongoing development programs and our business.

Our commercial opportunity could be reduced or eliminated if any competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any drugs that we may develop. Our competitors also may obtain FDA or foreign regulatory approval for their product candidates more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market. In addition, our ability to compete may be affected in many cases by insurers or other third-party payors who may place restrictions on patient access to our drugs in seeking to encourage the use of generic or cheaper drugs. If we fail to complete effectively, our business and operating results would be harmed.

We are dependent on our key personnel, and if we are not successful in attracting and retaining highly qualified personnel, we may not be able to successfully implement our business strategy.

Our ability to compete in the highly competitive oncology industry depends upon our ability to attract and retain highly qualified managerial, scientific and medical personnel. We have in the past and may in the future continue to experience changes in our executive management team resulting from the departure of executives or subsequent hiring of new executives, which may be disruptive to our business. Any changes in business strategies can create uncertainty, may negatively impact our ability to execute our business strategy and advance development, and may ultimately be unsuccessful. The impact of hiring new executives may not be immediately realized. We are substantially dependent on the continued service of our existing management, scientific and medical personnel, including Dr. Stephen Dilly, our President and Chief Executive Officer, Dr. Barbara Klencke, our Chief Medical Officer, and Dr. Mark Kowalski, our Chief of Research and Early Development, because of their familiarity with momelotinib and our

development efforts. The loss of the services of any of our executive officers, other key employees and other scientific and medical advisors, including due to illness resulting from COVID-19, and our inability to find suitable replacements, could result in delays in product development and harm our business.

Our operations are conducted in regions where significant competition exists for key personnel and employees. Many other oncology companies and academic and research institutions are located in these regions. Competition for skilled personnel in these markets is intense and may limit our ability to hire and retain highly qualified personnel on acceptable terms or at all.

To induce valuable employees to remain at our company, in addition to salary and cash incentives, we have provided stock options that vest over time. The value to employees of stock options that vest over time may be significantly affected by movements in our stock price that are beyond our control and may at any time be insufficient to counteract more lucrative offers from other companies. Despite our efforts to retain valuable employees, members of our management, scientific and development teams may terminate their employment with us on short notice. Although we have employment agreements with our key employees, these employment agreements provide for at-will employment, which means that any of our employees could leave our employment at any time, with or without notice. We do not maintain “key man” insurance policies on the lives of these individuals or the lives of any of our other employees.

Should momelotinib receive marketing approval in the United States, Canada, or elsewhere in the world, we would need to hire a substantial number of specialized personnel, including field-based personnel, unless we were to collaborate with a third party to commercialize momelotinib. If we are responsible for commercializing momelotinib, we would need to increase our administrative headcount to support such expanded development and commercialization operations with respect to momelotinib. Our ability to attract and retain qualified personnel in the future is subject to intense competition for qualified personnel among biotechnology, pharmaceutical and other businesses and our current financial position. The loss of the services of any of our senior management could delay or prevent the development and commercialization of momelotinib or have other adverse effects on our business for an indefinite term. In particular, if we lose any members of our current senior management team, we may not be able to find suitable replacements in a timely fashion, if at all, and our business may be harmed as a result.

We may encounter difficulties in managing our expected growth and in expanding our operations successfully.

Prior to acquiring momelotinib, our most advanced product candidate was in Phase 1/2 development. Advancing momelotinib through Phase 3 development will require us to develop or expand our development, regulatory, manufacturing, medical affairs, marketing and sales capabilities or contract with third parties to provide these capabilities for us. We must also successfully integrate the employees and operations related to the development of momelotinib. Maintaining additional relationships and managing our future growth will impose significant added responsibilities on members of our management. We must be able to manage our development efforts effectively, manage our clinical trials effectively, hire, train and integrate additional management, development, medical affairs, administrative and sales and marketing personnel, improve our managerial, development, operational and finance systems, and expand our facilities, all of which may impose a strain on our administrative and operational infrastructure. Our future financial performance will depend, in part, on our ability to manage this growth effectively. We may not be able to accomplish these tasks, failure of which could prevent us from successfully developing and potentially commercializing momelotinib.

If we are unable to adequately prepare the market for the potential future commercialization of a product, we may not be able to generate product revenue once marketing authorization is obtained. We currently have no marketing and sales organization and have no experience in marketing products. If we are unable to establish marketing and sales capabilities or enter into agreements with third parties to market and sell momelotinib or any future product candidates, we may not be able to generate product revenue.

We have substantial preparations remaining to be ready for potential future commercialization, and currently have limited commercialization expertise, including no sales, marketing or distribution capabilities and no experience in marketing products. Advancing momelotinib through Phase 3 development and closer to potential approval will require us to begin commercialization preparation activities and incur related expenses before we obtain final trial results and know whether MOMENTUM will support regulatory approval. These activities will include, among other things, the development of an in-house marketing organization and sales force, which will require significant capital expenditures, management resources and time. We will have to compete with other companies to recruit, hire, train and retain qualified marketing and sales personnel. If we are unable to adequately prepare the market for the potential future commercialization of a product, we may not be able to generate product revenue once marketing authorization is obtained.

Additionally, if we are unable or decide not to establish internal sales, marketing and distribution capabilities, we will pursue collaborative arrangements regarding the sales and marketing of our products, however, there can be no assurance that we will be able to establish or maintain such collaborative arrangements on commercially reasonable terms, or if we are able to do so, that they will have effective sales forces. Any revenue we receive will depend upon the efforts of such third parties, which may not be successful. We may have little or no control over the marketing and sales efforts of such third parties and our revenue from product sales may be lower than if we had commercialized momelotinib or any future product candidates ourselves. We also face competition in our search for third parties to assist us with the sales and marketing efforts of momelotinib.

We cannot guarantee that we will be able to develop in-house commercialization expertise, including sales and distribution capabilities, or establish or maintain relationships with third-party collaborators to commercialize any product in the United States or overseas.

We rely on the efficient and uninterrupted operation of information technology systems, including mobile technologies, to manage our operations, to process, transmit and store ~~electronic~~financial and ~~financial~~non-financial information, and to comply with regulatory, legal and tax requirements. We also depend on our information technology infrastructure for communications among our personnel, contractors, consultants and vendors. System failures or outages, including any potential disruptions due to significantly increased global demand on certain cloud based systems during the COVID-19 situation, could compromise our ability to perform these functions in a timely manner, which could harm our ability to conduct business or delay our financial reporting. Such failures could materially adversely affect our operating results and financial condition.

In addition, we depend on third parties to operate and support our information technology systems. These third parties vary from multi-disciplined to boutique providers, and they may have access to our ~~computer networks, mobile networks,~~technology infrastructure, systems and our confidential information. Many of these third parties subcontract or outsource some of their responsibilities to other third parties. As a result, our information technology systems, including those functions that are performed by third parties who are involved with or have access to our systems, are very large and complex. Failure by any of these third-party providers to adequately deliver the contracted services, or maintain confidentiality and adequate security controls, could have an adverse effect on our business, which in turn may materially adversely affect our operating results and financial condition. Although we take measures designed to prevent security breaches and cyberattacks, these efforts may not completely eliminate the risk of such incidents and we cannot guarantee security incidents will not impact us in the future. We may need to continuously increase cost and resources to protect security threats and their consequences. If our information technology systems were to fail or be breached, such failure or breach could materially adversely affect our ability to perform critical business functions and sensitive and confidential data could be compromised.

Our internal information technology systems, or those used by our CROs or other contractors or consultants, may fail or suffer security breaches and other security incidents.

Despite our efforts to implement effective administrative, technical, and physical security measures and controls, our internal information technology systems and those of our CROs and other contractors and consultants may become vulnerable to damage and other impacts from security breaches and other incidents and/or unauthorized access, use, and disclosure of protected health information (PHI) and other data. The prevalent use of mobile devices also increases the risk of data security breaches and incidents resulting from lost or stolen devices or compromised security controls. In the ordinary course of our business, we and our CROs and other contractors and consultants collect, store, process and transmit large amounts of sensitive information, including intellectual property, proprietary business information, personal information, health information, financial information, and other confidential information. It is critical that we and our CROs and other contractors and consultants do so in a secure manner in order to ensure the confidentiality, integrity, and availability of such sensitive information. We and certain of our CROs and other contractors and consultants have in the past experienced, and may in the future experience, a security breach or other security incident. When we have experienced security breaches in the past, we took action designed to prevent additional unauthorized access, put further security controls in place where appropriate and worked with outside counsel for any necessary reporting requirements. Any material system failure or security breach or incident could cause interruptions in our operations and could result in a material disruption of our development programs and our business operations. For example, the loss of data from completed or future preclinical studies or clinical trials could result in significant delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. Likewise, we rely on other third parties for the manufacture of momelotinib and to conduct studies and trials, and similar events relating to their information technology systems could also have a material adverse effect on our business. To the extent that any disruption or security breach or incident were to result in a loss of, or damage to, our data or applications, or inappropriate access to, or use, acquisition, or disclosure of confidential or proprietary information, including personal and sensitive information, we could incur liability and the further development and commercialization of momelotinib could be significantly delayed.

Unstable or unfavorable global market and economic conditions may have adverse consequences on our business, financial condition and stock price.

Our results of operations could be adversely affected by general conditions in the global economy and in the global financial markets. Global credit and financial markets have experienced extreme volatility and disruptions in the past several years, including severely diminished liquidity and credit availability, declines in consumer confidence, declines in economic growth, increases in unemployment rates and uncertainty about economic stability. We cannot assure you that further deterioration in credit and financial markets and confidence in economic conditions will not occur. Our general business strategy and stock price may be adversely affected by any such economic downturn, volatile business environment or large-scale unpredictable or unstable market conditions, including a prolonged government shutdown or as a result of a global pandemic such as the COVID-19 pandemic. While the potential economic impact brought by and the duration of the pandemic may be difficult to assess or predict, it has already caused and could result in further, significant disruption of global financial markets, which may reduce our ability to access capital either at all or on favorable terms. In addition, a recession, depression or other sustained adverse market event resulting from the spread of COVID-19 could materially and adversely affect our business and the value of our common stock.

If the current equity and credit markets deteriorate, it may make any necessary debt or equity financing more difficult, more costly and more dilutive. Failure to secure any necessary financing in a timely manner and on favorable terms could have a material adverse effect on our growth strategy, financial performance and stock price and could require us to delay or abandon development plans. In

addition, there is a risk that one or more of our current service providers, manufacturers and other partners may not survive difficult economic times, which could directly affect our ability to attain our operating goals on schedule and on budget.

Our employees, independent contractors, consultants, commercial partners and vendors may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements.

We are exposed to the risk of fraud or other illegal activity by our employees, independent contractors, consultants, commercial partners and vendors. Misconduct by such individuals could include intentional failures to comply with FDA or international regulations, provide accurate information to the FDA or foreign regulatory authorities, comply with manufacturing standards, comply with federal and state healthcare fraud and abuse laws and regulations, report financial information or data timely, completely and accurately or disclose unauthorized activities to us. In particular, sales, marketing and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, kickbacks, self-dealing and other abusive practices. These laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. Misconduct by third parties could also involve the improper use of information obtained in the course of clinical trials.

We have adopted a code of business conduct and ethics, but it is not always possible to identify and deter employee misconduct, and the precautions we take to detect and prevent inappropriate conduct may not be effective in controlling unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. Efforts to ensure that our business arrangements will comply with applicable healthcare laws may involve substantial costs. It is possible that governmental and enforcement authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law interpreting applicable fraud and abuse or other healthcare laws and regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business, including the imposition of civil, criminal and administrative penalties, damages, disgorgement, monetary fines, possible exclusion from participation in Medicare, Medicaid and other federal healthcare programs, contractual damages, reputational harm, diminished profits and future earnings and curtailment of our operations, any of which could adversely affect our ability to operate our business and our results of operations. In addition, the approval and commercialization of momelotinib outside the United States will also likely subject us to foreign equivalents of the healthcare laws mentioned above, among other foreign laws.

Even if approved, our product candidates may not achieve adequate market acceptance among physicians, patients, healthcare payors and others in the medical community necessary for commercial success.

Even if our product candidates receive regulatory approval, they may not gain adequate market acceptance among physicians, patients, healthcare payors and others in the medical community. The degree of market acceptance of any of our approved product candidates will depend on a number of factors, including:

If any of our product candidates is approved but does not achieve an adequate level of acceptance by physicians, hospitals, healthcare payors and patients, we may not generate or derive sufficient revenue from that product candidate and our financial results could be negatively impacted.

We have never commercialized a product candidate before and may lack the necessary expertise, personnel and resources to successfully commercialize any products on our own or together with suitable collaborators.

We have never commercialized a product candidate. We may license certain rights with respect to our product candidates to collaborators, and, if so, we will rely on the assistance and guidance of those collaborators. For product candidates for which we retain commercialization rights and marketing approval, we will have to develop our own sales, marketing and supply organization or outsource these activities to a third party.

Factors that may affect our ability to commercialize our product candidates, if approved, on our own include recruiting and retaining adequate numbers of effective sales and marketing personnel, developing adequate educational and marketing programs to increase public acceptance of our approved product candidates, ensuring regulatory compliance of our company, employees and third parties under applicable healthcare laws, and other unforeseen costs associated with creating an independent sales and marketing organization. Developing a sales and marketing organization will be expensive and time-consuming and could delay the launch of our product candidates upon approval. We may not be able to build an effective sales and marketing organization. If we are unable to build our own distribution and marketing capabilities or to find suitable partners for the commercialization of our product candidates, we may not generate revenues from them or be able to reach or sustain profitability.

If the market opportunity for any product candidate that we develop is smaller than we believe, our revenue may be adversely affected, and our business may suffer.

We intend to initially focus our product candidate development on treatments for various oncology indications, including myelofibrosis. The addressable patient populations that may benefit from treatment with our product candidates, if approved, are based on our estimates. These estimates, which have been derived from a variety of sources, including scientific literature, surveys of clinics, patient foundations and market research, may prove to be incorrect. Further, new studies may change the estimated incidence or prevalence of these diseases. Any regulatory approval of our product candidates would be limited to the therapeutic indications examined in our clinical trials and as determined by the FDA, which would not permit us to market our products for any other therapeutic indications not expressly approved by the FDA. Additionally, the potentially addressable patient population for our product candidates may not ultimately be amenable to treatment with our product candidates. Even if we receive regulatory approval for any of our product candidates, such approval could be conditioned upon label restrictions that materially limit the addressable patient population. Our market opportunity may also be limited by future competitor treatments that enter the market. If any of our estimates prove to be inaccurate, the market opportunity for any product candidate that we or our strategic partners develop could be significantly diminished and have an adverse material impact on our business.

If product liability lawsuits are brought against us, we may incur substantial liabilities and may be required to limit commercialization of momelotinib.

We face an inherent risk of product liability as a result of the testing of momelotinib and will face an even greater risk if we commercialize any products. For example, we may be sued if momelotinib causes or is perceived to cause injury or is found to be otherwise unsuitable during testing, manufacturing, marketing or sale. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability or a breach of warranties. Claims could also be asserted under state consumer protection acts. If we cannot successfully defend ourselves against product liability claims, we may incur substantial liabilities or be required to limit commercialization of momelotinib. Even successful defense would require significant financial and management resources. Regardless of the merits or eventual outcome, liability claims may result in, but are not limited to:

We currently hold liability insurance coverage, but that coverage may not be adequate to cover any and all liabilities that we may incur. We would need to increase our insurance coverage when we begin the commercialization of momelotinib, if ever. Insurance coverage is increasingly expensive. We may not be able to maintain insurance coverage at a reasonable cost or in an amount adequate to satisfy any liability that may arise.

A variety of risks associated with marketing our product candidates internationally may materially adversely affect our business.

We plan to eventually seek regulatory approval of our product candidates outside of the United States and, accordingly, we expect that we will be subject to additional risks related to operating in foreign countries if we obtain the necessary approvals, including:

These and other risks associated with international operations may materially adversely affect our ability to attain or maintain profitable operations.

Our ability to utilize our net operating loss carryforwards and certain other tax attributes may be significantly limited, or entirely restricted.

As of December 31, 2020, we had gross U.S. federal net tax operating loss carryforwards of 54.8 million that are eligible for an indefinite carryforward, and gross state operating loss carryforwards of $52.4 million expiring in years ranging from 2022 to 2040. As of December 31, 2020, we also had U.S. net tax credit carryforwards of $4.6 million which begin to expire in 2039 and net tax credit carryforwards in a foreign jurisdiction of $0.5 million which begin to expire in 2038.

Under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, if a corporation undergoes an “ownership change,” the corporation’s ability to use its pre-change net operating loss carryforwards and other pre-change tax attributes, such as research tax credits, to offset its post-change income and taxes may be limited. In general, an “ownership change” generally occurs if there is a cumulative change in our ownership by “5% stockholders” that exceeds 50 percentage points over a rolling three-year period. Similar rules may apply under state tax laws.

We have experienced ownership changes in the past, including in 2017 and 2019, and may experience ownership changes in the future as a result of future transactions in our stock, some of which may be outside our control. As a result, if we earn net taxable income, our ability to use our pre-change net operating loss carryforwards, or other pre-change tax attributes, to offset U.S. federal and state taxable income and taxes may be subject to limitations. We may have exposure to greater than anticipated tax liabilities, which could adversely impact our operating results.

We are a U.S.-based multinational company subject to tax in certain U.S. and foreign tax jurisdictions. U.S. federal, state and local, as well as international tax laws and regulations are extremely complex and subject to varying interpretations. Although we believe that our tax estimates and tax positions are reasonable, there can be no assurance that our tax positions will not be challenged by relevant tax authorities or that we would be successful in any such challenge. If we are unsuccessful in such a challenge, the relevant tax authorities may assess additional taxes, which could result in adjustments to, or impact the timing or amount of, taxable income, deductions or other tax allocations, which may adversely affect our results of operations and financial position.

Our quarterly operating results may fluctuate significantly, which may cause our stock price to fluctuate or decline.

We expect our operating results to be subject to quarterly fluctuations. Our net loss and other operating results will be affected by numerous factors, including, but not limited to:

If our quarterly operating results or expected results from development of momelotinib fall outside the expectations of investors or securities analysts, the price of our common stock could decline substantially. Furthermore, any quarterly fluctuations in our operating

results may, in turn, cause the price of our stock to fluctuate substantially. 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 may be unable to obtain U.S. or foreign regulatory approval of momelotinib, and, as a result, we may be unable to commercialize momelotinib. Obtaining and maintaining regulatory approval of our product candidates in one jurisdiction does not mean that we will be successful in obtaining regulatory approval of our product candidates in other jurisdictions.

Momelotinib is, and any future product candidates that we may develop will be, subject to extensive governmental regulations relating to, among other things, research, testing, development, manufacturing, safety, efficacy, approval, recordkeeping, import, export, reporting, labeling, storage, packaging, advertising and promotion, pricing, marketing, distribution, import and export of drugs. Rigorous preclinical testing and clinical trials and an extensive regulatory approval process are required to be successfully completed before a new drug can be marketed in the United States and in many foreign jurisdictions. Satisfaction of these and other regulatory requirements is costly, time-consuming, uncertain and subject to unanticipated delays. It is possible that none of the product candidates we may develop will obtain the regulatory approvals necessary for us or our collaborators to begin selling them.

As a company, we have very limited experience in conducting and managing the clinical trials necessary to obtain regulatory approvals, including approval by the FDA or foreign regulatory authorities, and, as a company, we have no experience in obtaining approval of any product candidates. The time required to obtain FDA and other approvals is unpredictable but typically takes many years following the initiation of clinical trials, depending upon the type, complexity and novelty of the product candidate. We may encounter delays or rejections during any stage of the regulatory review and approval process based upon the failure of clinical or laboratory data to demonstrate compliance with, or upon the failure of the product candidates to meet, the FDA’s or foreign regulatory authorities’ requirements for safety, efficacy and quality.

The standards that the FDA and foreign regulatory authorities use when regulating us are not always applied predictably or uniformly and can change. Because the product candidates we are developing or may develop may represent a new class of drug, the FDA and foreign regulatory authorities have not yet established any definitive policies, practices or guidelines in relation to these drugs. The lack of policies, practices or guidelines may hinder or slow review by the FDA or foreign regulatory authorities of any regulatory filings that we may submit. Moreover, the FDA or foreign regulatory authorities may respond to these submissions by defining requirements we may not have anticipated. Such responses could lead to significant delays in the development of momelotinib or any future product candidates.

Any analysis we perform of data from preclinical and clinical activities is subject to confirmation and interpretation by regulatory authorities, which could delay, limit or prevent regulatory approval. We may also encounter unexpected delays or increased costs due to new government regulations, for example, from future legislation or administrative action, or from changes in FDA or foreign regulatory authority policy during the period of product development, clinical trials and regulatory review. It is impossible to predict whether legislative changes will be enacted, or whether FDA or foreign regulatory authority, guidance or interpretations will be changed, or what the impact of such changes, if any, may be.

In addition, the FDA and/or foreign regulatory authorities may delay, limit, or deny approval of a product candidate for many reasons, including, but not limited to:

Even if we comply with all of the regulatory requirements of the FDA and foreign regulatory authorities, we may not obtain regulatory approval for momelotinib. If we fail to obtain regulatory approval for momelotinib, we will have no commercialized products and correspondingly no revenue.

In addition, because there may be approved treatments for some of the diseases for which we may seek approval, in order to receive regulatory approval, we may need to demonstrate through clinical trials that the product candidates we develop to treat these diseases, if any, are not only safe and effective, but safer or more effective than existing products. Furthermore, in recent years, there has been increased public and political pressure on the FDA with respect to the approval process for new drugs, and the FDA’s standards, especially regarding drug safety, appear to have become more stringent.

Any delay or failure in obtaining required approvals could have a material adverse effect on our ability to generate revenues from the particular product candidate for which we are seeking approval. Furthermore, any regulatory approval to market a product may be subject to limitations on the approved uses for which we may market the product or the labeling or other restrictions. In addition, the FDA has the authority to require a REMS plan as part of or after approval, which may impose further requirements or restrictions on the distribution or use of an approved product, such as limiting prescribing to certain physicians or medical centers that have undergone specialized training, limiting treatment to patients who meet certain safe-use criteria and requiring treated patients to enroll in a registry. These limitations and restrictions may limit the size of the market for the product and affect reimbursement by third-party payors.

If we or any collaborators, manufacturers or service providers fail to comply with applicable federal, state or foreign laws or regulations, we could be subject to enforcement actions, which could affect our ability to develop, market and sell our products successfully and could harm our reputation and lead to reduced acceptance of our products by the market. These enforcement actions include, among others:

We are also subject to numerous foreign regulatory requirements governing, among other things, the conduct of clinical trials, manufacturing and marketing authorization, pricing and third-party reimbursement. The foreign regulatory approval process varies among countries and may include all of the risks associated with FDA approval described above as well as risks attributable to the satisfaction of local regulations in foreign jurisdictions. Moreover, the time required to obtain approval may differ from that required to obtain FDA approval. Approval by the FDA does not ensure approval by regulatory authorities outside the United States and vice versa.

In Europe, the implementation of the Clinical Trials Regulation depends on confirmation of full functionality of the Clinical Trials Information System (CTIS) through an independent audit, which commenced in September 2020. The system is currently planned to go live in December 2021. The new clinical trial portal and database will be maintained by the EMA in collaboration with the

European Commission and the European Union Member States. The objectives of the new regulation include consistent rules for conducting trials throughout the European Union, consistent data standards and adverse events listing, and consistent information on the authorization status. Information on the conduct and results of each clinical trial carried out in the European Union will be made publicly available.

In addition, a new pan-European clinical trial data information database has been created that will be complementary to the database established for pharmacovigilance (Regulation (EC) No 726/2004 with respect to centrally authorized medicinal products). In addition, Commission Implementing Regulation (EU) No 520/2012 outlines the practical implications for marketing authorization holders, national competent authorities, and the EMA. Also, Commission Delegated Regulation (EU) No 357/2014 on post-authorization efficacy studies specifies the situations in which such studies may be required. Post-authorization efficacy studies may be required where concerns relating to some aspects of efficacy of the medicinal product are identified and can be resolved only after the medicinal product has been marketed, or where the understanding of the disease, the clinical methodology or the use of the medicinal product under real-life conditions indicate that previous efficacy evaluations might have to be revised significantly.

Brexit is also expected to disrupt the operation of pre- and post-authorization clinical trial infrastructure. The rules around GMP and pharmacovigilance in the UK currently remain similar to the EU requirements. However, the Falsified Medicines Directive will not apply in Great Britain though it is likely that the UK will implement a procedure to minimise the risk of falsified medicines.

Uncertainty in the regulatory framework and future legislation can lead to disruption in the execution of international multi-center clinical trials, the monitoring of adverse events in through pharmacovigilance programs, the evaluation of the benefit-risk profiles of new medicinal products, and determination of marketing authorization across different jurisdictions. There could also be disruption to the supply and distribution as well as the import/export both of active pharmaceutical ingredients (API) and finished product. Such a disruption could create supply difficulties for ongoing clinical trials and may damage the integrity of the pharmacovigilance database for the safety of new products.

The cumulative effects of the disruption to the regulatory framework, uncertainty in future regulation, and changes to existing regulations may add considerably to the development lead time to marketing authorization and commercialization of products in the European Union and/or the United Kingdom and increase our costs. We cannot predict the impact of such changes and future regulation on our business or the results of our operations.

Even if we receive regulatory approval of any product candidates, we will be subject to ongoing regulatory obligations and continued regulatory review, which may result in significant additional expense and we may be subject to penalties if we fail to comply with regulatory requirements or experience unanticipated problems with our product candidates.

Any regulatory approvals that we receive for any product candidates we may develop will require surveillance to monitor the safety and efficacy of the product candidate, and may require us to conduct post-approval clinical studies. The FDA may also require a REMS in order to approve momelotinib or any future product candidates, which could entail requirements for a medication guide, physician communication plans or additional elements to ensure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. In addition, if the FDA or a foreign regulatory authority approves momelotinib, the manufacturing processes, labeling, packaging, distribution, AE reporting, storage, advertising, promotion, import, export and recordkeeping for momelotinib will be subject to extensive and ongoing regulatory requirements. These requirements include submissions of safety and other post-marketing information and reports, registration, as well as continued compliance with cGMPs and GCPs for any clinical trials that we conduct post-approval.

Moreover, if we obtain regulatory approval for momelotinib, we will only be permitted to market our products for the indication approved by FDA or foreign regulatory authority, and such approval may involve limitations on the indicated uses or promotional claims we may make for our products, or otherwise not permit labeling that sufficiently differentiates momelotinib from competitive products with comparable therapeutic profiles. For example, we will not be able to claim that our products have fewer side effects, or improve compliance or efficacy unless we can demonstrate those attributes to FDA or foreign regulatory authority in comparative clinical trials. Communications that occur prior to obtaining regulatory approval for momelotinib could also be considered promotional and thus may also be subject to certain FDA or foreign regulatory authority requirements.

Later discovery of previously unknown problems with momelotinib, including adverse effects of unanticipated severity or frequency, or with our third-party manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may result in, among other things:

The FDA’s and foreign regulatory authorities’ policies may change, and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action, either in the United States or abroad. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained, and we may not achieve or sustain profitability.

Moreover, the FDA strictly regulates the promotional claims that may be made about drug products. In particular, a product may not be promoted for uses that are not approved by the FDA as reflected in the product’s approved labeling. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to significant civil, criminal and administrative penalties. The occurrence of any event or penalty described above may inhibit our ability to commercialize our product candidates and generate revenue and could require us to expend significant time and resources in response and could generate negative publicity.

A Fast Track designation by the FDA, ~~even if~~as granted for momelotinib or if granted for any future product candidates, may not lead to a faster development or regulatory review or approval process, and does not increase the likelihood that such product candidates will receive marketing approval.

If a drug is intended for the treatment of a serious or life-threatening condition and the drug demonstrates the potential to address unmet medical needs for this condition, the drug sponsor may apply for FDA Fast Track designation for a particular indication. Marketing applications filed by sponsors of products in Fast Track development may qualify for priority review under the policies and procedures offered by the FDA, but the Fast Track designation does not assure any such qualification or ultimate marketing approval by the FDA. We previously announced that the FDA had granted Fast Track designation to momelotinib for the treatment of patients with intermediate/high-risk myelofibrosis who have previously received a JAK inhibitor. Receipt of Fast Track designation may not result in a faster development process, review or approval compared to drugs considered for approval under conventional FDA procedures. In addition, the FDA may withdraw any Fast Track designation at any time if it believes that the designation is no longer supported by data from our clinical development program. We may seek Fast Track designation for any future product candidates, but there is no assurance that the FDA will grant this status to any future proposed product candidates.

If we or any of our independent contractors, consultants, collaborators, manufacturers, vendors or service providers fail to comply with healthcare and data privacy laws and regulations, we or they could be subject to enforcement actions, which could result in penalties and affect our ability to develop, market and sell momelotinib or any future product candidates and may harm our reputation.

We are or may in the future be subject to federal, state, and foreign healthcare and data privacy laws and regulations pertaining to, among other things, fraud and abuse, data protection and patients’ rights. These laws and regulations include, but are not limited to:

In the European Union (EU), the General Data Protection Regulation (GDPR) was adopted in 2016 and took effect on May 25, 2018. The GDPR is intended to harmonize data protection requirements across the EU Member States by establishing new and expanded operational requirements for entities that process, or control personal data generated in the EU, including consent requirements for disclosing the way personal information will be used, information retention requirements, notification requirements in the event of a data breach, and other requirements. In addition, the GDPR imposes strict rules on the transfer of personal data out of the EU to the United States. These obligations may be interpreted and applied in a manner that is inconsistent from one jurisdiction to another and may conflict with other requirements or our practices. Recent developments have also created uncertainty regarding the rules around such data transfers.

Any actual or alleged violation of the GDPR could result in regulatory investigations and other proceedings, reputational damage, orders to cease or change our processing of our data, enforcement notices, or assessment notices (for a compulsory audit). We may also face civil claims including representative actions and other class action type litigation (where individuals have suffered harm), potentially amounting to significant compensation or damages liabilities, as well as associated costs, diversion of internal resources, and reputational harm. Additionally, following the United Kingdom’s exit from the European Union, the UK is a “third country” under the GDPR. In particular, from and after January 2021, we face exposure in the European Economic Area and the United Kingdom under two parallel regimes, each with the power to impose fines up to the greater of either 4% of total global annual revenue, or €20 million (for the EU) or £17.5 million (for the United Kingdom). We may incur liabilities, expenses, costs, and other operational losses under the GDPR, and applicable laws and regulations relating to privacy and data protection of EU member states and the United Kingdom, in connection with any measures we take to comply with them.

In July 2020, the Court of Justice of the EU (CJEU) invalidated the EU-U.S. Privacy Shield as a mechanism for managing personal data transfers between the EU and the U.S. and onward to other countries. Additionally, in September 2020, the Federal Data Protection and Information Commissioner of Switzerland opined that the Swiss-U.S. Privacy Shield did not provide an adequate level of protection for data transfers from Switzerland to the U.S. pursuant to Swiss data protection law. While the CJEU upheld the adequacy of EU-specified standard contractual clauses (SCCs), a form of contract approved by the European Commission as an adequate data transfer mechanism, the CJEU made clear that reliance on them alone may not necessarily be sufficient in all circumstances and that their use must be assessed on a case-by-case basis taking into account the surveillance laws and right of individuals in the U.S and other onward countries. Data protection authorities may require measures to be put in place in addition to the SCCs for transfers to countries outside of the European Economic Area (EEA), as well as Switzerland and the United Kingdom.

We are currently certified under the EU-U.S. Privacy Shield and the Swiss-U.S. Privacy Shield with respect to our transfer of certain personal data from the EEA to the U.S. We are, however, in the process of updating the mechanisms we currently use to transfer personal data from the EEA and the United Kingdom to the U.S., and any additional mechanisms that may be required to maintain adequate safeguards for personal data transfer, including in light of new SCCs issued by the European Commission on June 4, 2021. As a result, we may be unsuccessful in maintaining appropriate compliance mechanisms for our transfer and receipt of personal data

from the EEA or the United Kingdom and to the U.S. and may be at risk of experiencing reluctance or refusal of European or multi-national partners, clinical trial sites or other third parties with whom we do business and incurring potential regulatory penalties, which may have an adverse effect on our reputation and business.

As developments continue with respect to personal data transfers, we could suffer additional costs, complaints, or regulatory fines, investigations, or other proceedings, and if we are otherwise unable to transfer personal data between and among countries and regions in which we operate, it could affect the manner in which we provide our services, the geographical location or segregation of our relevant systems and operations, and could adversely affect our financial results. We also may be required to engage in new contract negotiations with third parties that aid in processing data on our behalf.

In the United States, state and federal lawmakers and regulatory authorities have increased their attention on the collection and use of personal information. In the United States, non-sensitive personal information generally may be used under current rules and regulations, subject to certain restrictions, so long as the person does not affirmatively “opt-out” of the collection or use of such data. If an “opt-in” model or additional required “opt-outs”, were to be adopted in the United States, less data would be available, and the cost of data would be higher. For example, California enacted the CCPA, which became operative on January 1, 2020 and became enforceable by California Attorney General on July 1, 2020, along with related regulations which came into force on August 14, 2020.

The CCPA gives California residents new rights to access and require deletion of their personal information, opt out of certain personal information sharing, and receive detailed information about how their personal information is collected, used, and shared. Additionally, the CCPA has prompted a number of proposals for new federal and state-level privacy legislation. Further, in November 2020, California voters passed the California Privacy Rights Act (CPRA). The CPRA, which is expected to take effect on January 1, 2023 and to create obligations with respect to certain data relating to consumers as of January 1, 2022, significantly expands the CCPA, including by introducing additional obligations such as data minimization and storage limitations, granting additional rights to consumers, such as correction of personal information and additional opt-out rights, and creates a new entity, the California Privacy Protection Agency, to implement and enforce the law. The CCPA and CPRA present many unresolved compliance complexities. The CCPA and CPRA may increase our compliance costs and potential liability. In addition to the CCPA, numerous other states’ legislatures are considering similar laws that will require ongoing compliance efforts and investment. For example, in March 2021, Virginia enacted a Consumer Data Protection Act that will go into effect on January 1, 2023 and in June 2021, Colorado enacted a Colorado Privacy Act that will go into effect on July 1, 2023, both of which share similarities with the CCPA, CPRA, and legislation proposed in other states.

Additionally, if our operations are found to be in violation of any such health care and data privacy laws and regulations, we may be subject to penalties, including administrative, civil and criminal penalties, monetary damages, disgorgement, imprisonment, the curtailment or restructuring of our operations, loss of eligibility to obtain approvals from the FDA or foreign regulatory authorities, fees from regulators, fines, significant settlements or judgments resulting from the CCPA’s private right of action, or exclusion from participation in government contracting, healthcare reimbursement or other government programs, including Medicare and Medicaid, any of which could adversely impact our financial results. Although effective compliance programs can mitigate the risk of investigation and prosecution for violations of these laws, these risks cannot be entirely eliminated. Any action against us for an alleged or suspected violation by a private party or governmental agency could cause us to incur significant legal expenses, adversely impact our reputation, and could divert our management’s attention from the operation of our business, even if our defense is successful. In addition, achieving and sustaining compliance with applicable laws and regulations may be costly to us in terms of money, time and resources.

The insurance coverage and reimbursement status of newly approved products is uncertain. Any products we develop may become subject to unfavorable pricing regulations, third-party coverage and reimbursement practices or healthcare reform initiatives, thereby harming our business.

The regulations that govern marketing approvals, pricing, coverage and reimbursement for new drugs vary widely from country to country. Many countries require approval of the sale price of a drug before it can be marketed. The pricing review period begins after marketing or product licensing approval is granted in most cases. In some foreign markets, prescription pharmaceutical pricing remains subject to continuing governmental control even after initial approval is granted. Although we intend to monitor these regulations, our momelotinib program is currently in development and we will not be able to assess the impact of price regulations for a few years. As a result, we might obtain regulatory approval for a product in a particular country, but then be subject to price regulations that delay our commercial launch of the product and negatively impact the revenues we are able to generate from the sale of the product in that country.

Our ability to commercialize any products successfully also will depend in part on the extent to which coverage and adequate reimbursement for these products and related treatments will be available from government health administration authorities, private health insurers and other third-party payors. In many jurisdictions, a product candidate must be approved for reimbursement before it can be approved for sale in that jurisdiction. Obtaining coverage and reimbursement approval of a product from a government or other third-party payor is a time-consuming and costly process that could require us to provide to the payor supporting scientific, clinical and cost-effectiveness data for the use of our products. If we are not currently capturing the scientific and clinical data that will be required for reimbursement approval, we may be required to conduct additional trials, which may delay or suspend reimbursement

approval. Additionally, in the United States, no uniform policy of coverage and reimbursement for products exists among third-party payors. Therefore, coverage and reimbursement for products can differ significantly from payor to payor. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical support for the use of momelotinib to each payor separately, with no assurance that coverage and adequate reimbursement will be obtained.

A primary trend in the U.S. healthcare industry and elsewhere is cost containment. Government authorities and third-party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular medications. In many countries, the prices of medical products are subject to varying price control mechanisms as part of national health systems. In general, the prices of medicines under such systems are substantially lower than in the United States. Other countries allow companies to fix their own

prices for medicines, but monitor and control company profits. Additional foreign price controls or other changes in pricing regulation could restrict the amount that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for products may be reduced compared with the United States and may be insufficient to generate commercially reasonable revenue and profits.

In the United States and markets in other countries, patients generally rely on third-party payors to reimburse all or part of the costs associated with their treatment. Adequate coverage and reimbursement from governmental healthcare programs, such as Medicare and Medicaid, and commercial payors is critical to new product acceptance. Even if we succeed in bringing one or more products to the market, these products may not be considered cost-effective, and the amount reimbursed for any products may be insufficient to allow us to sell our products on a competitive basis. Because our programs are still in clinical development, we are unable at this time to determine their cost effectiveness or the likely level or method of reimbursement. Increasingly, the third-party payors, such as government and private insurance plans, who reimburse patients or healthcare providers, are requiring that drug companies provide them with predetermined discounts from list prices, and are seeking to reduce the prices charged or the amounts reimbursed for pharmaceutical products. If the level of reimbursement provided for any products we develop is inadequate in light of our development and other costs, our return on investment could be adversely affected.

The Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA), established the Medicare Part D program to provide a voluntary prescription drug benefit to patients with disabilities and seniors. Under Part D, Medicare beneficiaries may enroll in prescription drug plans offered by private entities that will provide coverage of outpatient prescription drugs, such as momelotinib, if approved. Medicare Part D coverage is not standardized. Part D prescription drug plan sponsors are not required to pay for all covered Part D drugs, and each drug plan can develop its own drug formulary that identifies which drugs it will cover and at what tier or level. However, Part D prescription drug formularies must include drugs within each therapeutic category and class of covered Part D drugs, though not necessarily all the drugs in each category or class. Any formulary used by a Part D prescription drug plan must be developed and reviewed by a pharmacy and therapeutic committee.

The Bipartisan Budget Act of 2018 also amended the ACA, effective January 1, 2019, by increasing the point-of-sale discount that is owed by pharmaceutical manufacturers who participate in Medicare Part D and closing the coverage gap in most Medicare drug plans, commonly referred to as the “donut hole.” CMS published a final rule permitting further collections and payments to and from certain ACA qualified health plans and health insurance issuers under the ACA risk adjustment program in response to the outcome of federal district court litigation regarding the method CMS uses to determine this risk adjustment. In addition, CMS has published a final rule to give states greater flexibility, starting in 2020, in setting benchmarks for insurers in the individual and small group marketplaces, which may have the effect of relaxing the essential health benefits required under the ACA for plans sold through such marketplaces. The American Taxpayer Relief Act of 2012, or ATRA, among other things, reduced Medicare payments to several providers, including hospitals, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. Other legislative changes include aggregate reductions to Medicare payments to providers of up to 2% per fiscal year pursuant to the Budget Control Act of 2011, which began in 2013 and will remain in effect through 2030 with the exception of a temporary suspension implemented under various COVID-19 relief legislation from May 1, 2020 through the end of 2021, unless additional Congressional action is taken.

In addition, other legislative changes have been proposed and adopted since the ACA was enacted. There has been increasing legislative and enforcement interest in the United States with respect to specialty drug pricing practices. Specifically, there have been several recent U.S. Congressional inquiries and proposed federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for drugs. At the federal level, in 2020, under the Trump administration, HHS and CMS issued various rules that are expected to impact, among others, price reductions from pharmaceutical manufacturers to plan sponsors under Part D, fee arrangements between pharmacy benefit managers and manufacturers, importation of prescription drugs from Canada and other countries, manufacturer price reporting requirements under the Medicaid Drug Rebate Program, including regulations that affect manufacturer-sponsored patient assistance programs subject to pharmacy benefit manager accumulator programs and Best Price reporting related to certain value-based purchasing arrangements. Multiple lawsuits have been brought against the HHS challenging various aspects of these new rules. In January 2021, the Biden administration issued a “regulatory freeze” memorandum that directs department and agency heads to review new or pending rules of the prior administration. It is unclear whether these new regulations will be withdrawn or when they will become fully effective under

the current administration. Under the American Rescue Plan Act of 2021, effective January 1, 2024, the statutory cap on Medicaid Drug Rebate Program rebates that manufacturers pay to state Medicaid programs will be eliminated. Elimination of this cap may require pharmaceutical manufacturers to pay more in rebates than it receives on the sale of approved products, which could have a material impact on our business. The impact of these lawsuits as well as legislative, executive, and administrative actions of the current administration on us and the pharmaceutical industry as a whole is unclear.

At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries

and bulk purchasing. In addition, regional health care authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other health care programs. These measures could reduce the ultimate demand for our products, once approved, or put pressure on our product pricing. We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced demand for momelotinib or additional pricing pressures.

We may face difficulties from changes to current regulations and future legislation. Healthcare legislative measures aimed at reducing healthcare costs may have a material adverse effect on our business and results of operations.

The United States and many foreign jurisdictions have enacted or proposed legislative and regulatory changes affecting the healthcare system that could prevent or delay marketing approval of our product candidates or any future product candidates, restrict or regulate post-approval activities and affect our ability to profitably sell a product for which we obtain marketing approval. Changes in regulations, statutes or the interpretation of existing regulations could impact our business in the future by requiring, for example:

Our revenue prospects could be affected by changes in healthcare spending and policy in the United States and abroad. We operate in a highly regulated industry and new laws, regulations or judicial decisions, or new interpretations of existing laws, regulations or decisions, related to healthcare availability, the method of delivery or payment for healthcare products and services could negatively impact our business, operations and financial condition.

There have been, and likely will continue to be, legislative and regulatory proposals at the foreign, federal and state levels directed at broadening the availability of healthcare and containing or lowering the cost of healthcare. We cannot predict the initiatives that may be adopted in the future, including revisions to the ACA. The continuing efforts of the government, insurance companies, managed care organizations and other payors of healthcare services to contain or reduce costs of healthcare and/or impose price controls may adversely affect:

Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors, which may adversely affect our future profitability.

We expect that the ACA, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in additional downward pressure on the price that we receive for any approved product. Further, it is possible that additional governmental action is taken to address the COVID-19 pandemic. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability or

commercialize our product candidates. Legislative and regulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for biotechnology products. We cannot be sure to what extent these and future legislative and regulatory efforts, whether FDA regulations, guidance or interpretations will be changed, or what the impact of such changes on the marketing approvals of our product candidates, if any, may be. In addition, increased scrutiny by Congress of the FDA’s approval process may significantly delay or prevent marketing approval, as well as subject us to more stringent product labeling and post-marketing testing and other requirements.

Disruptions at the FDA, the Securities and Exchange Commission and other government agencies caused by funding shortages or global health concerns could hinder their ability to hire and retain key leadership and other personnel, or otherwise prevent new or modified products from being developed, approved or commercialized in a timely manner or at all, or otherwise prevent those agencies from performing normal business functions on which the operation of our business may rely, which could negatively impact our business.

The ability of the FDA to review and approve new products can be affected by a variety of factors, including government budget and funding levels, ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory, and policy changes, and other events that may otherwise affect the FDA’s ability to perform routine functions. Average review times at the agency have fluctuated in recent years as a result. In addition, government funding of the Securities and Exchange Commission, or the SEC, and other government agencies on which our operations may rely, including those that fund research and development activities is subject to the political process, which is inherently fluid and unpredictable.

Disruptions at the FDA and other agencies may also slow the time necessary for new drugs to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. For example, in recent years, including in 2018 and 2019, the U.S. government shut down several times and certain regulatory agencies, such as the FDA and the SEC, had to furlough critical employees and stop critical activities. Separately, in response to the COVID-19 pandemic, on March 10, 2020 the FDA announced its intention to postpone most inspections of foreign manufacturing facilities and products through April 2020. On March 18, 2020, the FDA announced its intention to temporarily postpone routine surveillance inspections of domestic manufacturing facilities and provided guidance regarding the conduct of clinical trials. In May 2020, FDA announced that it will continue to postpone domestic and foreign routine surveillance inspections due to COVID-19. In August 2020, as updated in 2021, FDA also issued a Questions and Answers guide on manufacturing, supply chain, and pharmaceutical product inspections during the public health emergency. The FDA indicated that it continues to use various tools and alternative methods, where possible, for inspections and exercises discretion on a case-by-case basis to conduct domestic inspections with a risk assessment system. In the event of any prolonged government shutdown, or if global health concerns continue to prevent the FDA or other regulatory authorities from conducting their regular inspections, reviews, or other regulatory activities on a timely basis, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material adverse effect on our business. Further, future government shutdowns or delays could impact our ability to access the public markets and obtain necessary capital in order to properly capitalize and continue our operations.

Obtaining and maintaining regulatory approval for momelotinib or any future product candidates in one jurisdiction does not mean that we will be successful in obtaining regulatory approval of any of our product candidates in other jurisdictions.

Obtaining and maintaining regulatory approval for momelotinib or any future product candidates in one jurisdiction does not guarantee that we will be able to obtain or maintain regulatory approval in any other jurisdiction, while a failure or delay in obtaining regulatory approval in one jurisdiction may have a negative effect on the regulatory approval process in others. For example, even if the FDA grants marketing approval for a product candidate, comparable regulatory authorities in foreign jurisdictions must also approve the manufacturing, marketing and promotion of the product candidate in those countries. Approval procedures vary among jurisdictions and can involve requirements and administrative review periods different from, and greater than, those in the United States, including additional preclinical studies or clinical trials as clinical studies conducted in one jurisdiction may not be accepted by regulatory authorities in other jurisdictions. In many jurisdictions outside the United States, a product candidate must be approved for reimbursement before it can be approved for sale in that jurisdiction. In some cases, the price that we intend to charge for our products is also subject to approval.

We may also submit marketing applications in other countries. Regulatory authorities in jurisdictions outside of the United States have requirements for approval of product candidates with which we must comply prior to marketing in those jurisdictions. Obtaining foreign regulatory approvals and compliance with foreign regulatory requirements could result in significant delays, difficulties and costs for us and could delay or prevent the introduction of our products in certain countries. If we fail to comply with the regulatory requirements in international markets or receive applicable marketing approvals, our target market will be reduced and our ability to realize the full market potential of momelotinib or any future product candidates will be harmed.

If we or our third-party manufacturers fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could have a material adverse effect on the success of our business.

Our research and development activities involve the controlled use of potentially hazardous substances, including chemical and biological materials, by ourselves and our third-party manufacturers. Our manufacturers are subject to federal, state and local laws and regulations in the United States and abroad governing laboratory procedures and the use, manufacture, storage, handling and disposal of medical and hazardous materials. Although we believe that our manufacturers’ procedures for using, handling, storing and disposing of these materials comply with legally prescribed standards, we cannot completely eliminate the risk of contamination or injury resulting from medical or hazardous materials. As a result of any such contamination or injury, we may incur liability or local, city, state or federal authorities may curtail the use of these materials and interrupt our business operations. In the event of an accident, we could be held liable for damages or penalized with fines, and the liability could exceed our resources. We do not have any insurance for liabilities arising from medical or hazardous materials. Compliance with applicable environmental, health and safety

laws and regulations is expensive, and current or future environmental regulations may impair our research, development and production efforts, which could harm our business, prospects, financial condition or results of operations.

Although we maintain workers’ compensation insurance to cover us for costs and expenses, we may incur due to injuries to our employees resulting from the use of hazardous materials, this insurance may not provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or future laws and regulations may impair our research, development or production efforts. Failure to comply with these laws and regulations also may result in substantial fines, penalties or other sanctions.

We are subject to certain U.S. and foreign anti-corruption, anti-money laundering, export control, sanctions, and other trade laws and regulations. We can face serious consequences for violations.

Among other matters, U.S. and foreign anti-corruption, anti-money laundering, export control, sanctions, and other trade laws and regulations, which are collectively referred to as Trade Laws, prohibit companies and their employees, agents, clinical research organizations, legal counsel, accountants, consultants, contractors, and other partners from authorizing, promising, offering, providing, soliciting, or receiving directly or indirectly, corrupt or improper payments or anything else of value to or from recipients in the public or private sector. Violations of trade laws can result in substantial criminal fines and civil penalties, imprisonment, the loss of trade privileges, debarment, tax reassessments, breach of contract and fraud litigation, reputational harm, and other consequences. We have direct or indirect interactions with officials and employees of government agencies or government-affiliated hospitals, universities, and other organizations. We also expect our non-U.S. activities to increase in time. We plan to engage third parties for clinical trials and/or to obtain necessary permits, licenses, patent registrations, and other regulatory approvals and we can be held liable for the corrupt or other illegal activities of our personnel, agents, or partners, even if we do not explicitly authorize or have prior knowledge of such activities.

The Tax Cuts and Jobs Act could increase our tax burden and adversely affect our business and financial condition.

In December 2017, the U.S. government enacted comprehensive tax legislation referred to as the Tax Cuts and Jobs Act (Tax Act) that includes significant changes to the taxation of business entities. These changes include, among others, (i) a permanent reduction to the corporate income tax rate, (ii) revisions to uses and limitations of net operating loss carryforwards (iii) a partial limitation on the deductibility of business interest expense, and (iv) a shift of the U.S. taxation of multinational corporations from a tax on worldwide income to a participation exemption system (along with certain rules designed to prevent erosion of the U.S. income tax base).

In addition, beginning in 2022, the tax legislation will require U.S. research and experimental expenditures to be capitalized and amortized ratably over a five-year period. Any such expenditures attributable to research conducted outside the U.S. must be capitalized and amortized over a 15-year period. Further, the Tax Act, among other things, reduces the orphan drug credit from 50% to 25% of qualifying expenditures. When and if we become profitable, this amortization of research and experimental expenditures and reduction in orphan drug tax credits may result in an increased federal income tax burden, as it may cause us to pay federal income taxes earlier under the revised tax law than under the prior law and, despite being partially off-set by a reduction in the corporate tax rate from a top marginal rate of 35% to a flat rate of 21%, may increase our total federal tax liability.

If we are not able to obtain and enforce patent protection for our technologies or momelotinib, development and commercialization of our product candidates may be adversely affected.

Our success depends in part on our ability to obtain and maintain patents and other forms of intellectual property rights, including in-licenses of intellectual property rights of others, methods used to manufacture momelotinib and methods for treating patients using momelotinib, as well as our ability to preserve our trade secrets, to prevent third parties from infringing upon our proprietary rights and to operate without infringing upon the proprietary rights of others.

We and our future licensors and licensees may not be able to apply for or prosecute patents on certain aspects of momelotinib or our technologies at a reasonable cost in a timely fashion or at all. It is also possible that we or our current licensors, or any future licensors or licensees, will fail to identify patentable aspects of inventions made in the course of development and commercialization activities before it is too late to obtain patent protection on them. Therefore, our patents and applications may not be prosecuted and enforced in a manner consistent with the best interests of our business. It is possible that defects of form in the preparation or filing of our patents or patent applications may exist, or may arise in the future, such as with respect to proper priority claims, inventorship, claim scope or patent term adjustments. If our current licensors, or any future licensors or licensees, are not fully cooperative or disagree with us as to the prosecution, maintenance or enforcement of any patent rights, such patent rights could be compromised and we might not be able to prevent third parties from making, using, and selling competing products. If there are material defects in the form or preparation of

our patents or patent applications, such patents or applications may be invalid and unenforceable. Moreover, our competitors may independently develop equivalent knowledge, methods, and know-how. Any of these outcomes could impair our ability to prevent competition from third parties, which may have an adverse impact on our business, financial condition and operating results.

There is no guarantee that any of our pending patent applications will result in issued or granted patents, that any of our issued or granted patents will not later be found to be invalid or unenforceable or that any issued or granted patents will include claims that are sufficiently broad to cover momelotinib, methods for treating patients using momelotinib or our technologies for manufacturing momelotinib or to provide meaningful protection from our competitors. Moreover, the patent position of oncology companies can be highly uncertain because it involves complex legal and factual questions. We will be able to protect our proprietary rights from unauthorized use by third parties only to the extent that our current and future proprietary technology and momelotinib are covered by valid and enforceable patents or are effectively maintained as trade secrets. If third parties disclose or misappropriate our proprietary rights, it may materially and adversely impact our position in the market.

The U.S. Patent and Trademark Office (USPTO) and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment and other provisions during the patent process. There are situations in which noncompliance can result in abandonment or lapse of a patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. In such an event, competitors might be able to enter the market earlier than would otherwise have been the case. The standards applied by the USPTO and foreign patent offices in granting patents are not always applied uniformly or predictably. For example, there is no uniform worldwide policy regarding patentable subject matter or the scope of claims allowable in oncology patents. Moreover, changes in either the patent laws or in the interpretations of patent laws in the United States and other countries may diminish the value of our intellectual property. As such, we do not know the degree of future protection that we will have on our proprietary products and technology. While we will endeavor to try to protect momelotinib with intellectual property rights such as patents, as appropriate, the process of obtaining patents is time-consuming, expensive and sometimes unpredictable.

Further, patents have a limited lifespan. In the United States, the natural expiration of a patent is generally 20 years after it is filed (or 20 years after the filing date of the first non-provisional US patent application to which it claims priority). Various extensions may be available; however, the life of a patent, and the protection it affords, is limited. Without patent protection for momelotinib, we may be open to competition from generic versions of momelotinib. Further, the extensive period of time between patent filing and regulatory approval for a product candidate limits the time during which we can market a product candidate under patent protection, which may particularly affect the profitability of momelotinib.

If we are unable to protect the confidentiality of our trade secrets our business and competitive position would be harmed.

In addition to seeking patent protection for certain aspects of momelotinib and our technologies, we also consider trade secrets, including confidential and unpatented know-how important to the maintenance of our competitive position. We protect trade secrets and confidential and unpatented know-how, in part, by entering into non-disclosure and confidentiality agreements with parties who have access to such knowledge, such as our employees, outside scientific collaborators, CROs, contract manufacturers, consultants, advisors and other third parties. We also enter into confidentiality and invention or patent assignment agreements with our employees and consultants that obligate them to maintain confidentiality and assign their inventions to us.

Despite these efforts, any of these parties may breach the agreements and disclose our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret is difficult, expensive and time-consuming, and the outcome is unpredictable. In addition, some courts

in the United States and certain foreign jurisdictions are less willing or unwilling to protect trade secrets. If any of our trade secrets were to be lawfully obtained or independently developed by a competitor, we would have no right to prevent them from using that technology or information to compete with us. If any of our trade secrets were to be disclosed to or independently developed by a competitor, our competitive position would be harmed.

We are also subject both in the United States and outside the United States to various regulatory schemes regarding requests for the information we provide to regulatory authorities, which may include, in whole or in part, trade secrets or confidential commercial information. While we are likely to be notified in advance of any disclosure of such information and would likely object to such disclosure, there can be no assurance our challenge to the request would be successful.

Changes in patent law could diminish the value of patents in general, thereby impairing our ability to protect momelotinib.

Numerous recent changes to the patent laws and proposed changes to the rules of the USPTO may have a significant impact on our ability to protect our technology and enforce our intellectual property rights. For example, the Leahy-Smith America Invents Act (AIA) enacted in 2011 involves significant changes in patent legislation. An important change introduced by the AIA is that, as of March 16, 2013, the United States transitioned to a “first-to-file” system for deciding which party should be granted a patent when two or more patent applications are filed by different parties claiming the same invention. A third party that files a patent application in the USPTO after that date but before us could therefore be awarded a patent covering an invention of ours even if we had made the

invention before it was made by the third party. This will require us to be cognizant going forward of the time from invention to filing of a patent application.

Further, the Supreme Court has ruled on several patent cases in recent years, some of which cases either narrow the scope of patent protection available in certain circumstances or weaken the rights of patent owners in certain situations. These changes have led to increasing uncertainty with regard to the scope and value of our issued patents and to our ability to obtain patents in the future.

Among some of the other changes introduced by the AIA are changes that limit where a patentee may file a patent infringement suit and providing opportunities for third parties to challenge any issued patent in the USPTO. This applies to all of our U.S. patents, even those issued before March 16, 2013. Because of a lower evidentiary standard in USPTO proceedings compared to the evidentiary standard in United States federal court necessary to invalidate a patent claim, a third party could potentially provide evidence in a USPTO proceeding sufficient for the USPTO to hold a claim invalid even though the same evidence would be insufficient to invalidate the claim if first presented in a district court action. Accordingly, a third party may attempt to use the USPTO procedures to invalidate our patent claims that would not have been invalidated if first challenged by the third party as a defendant in a district court action.

Depending on decisions by the U.S. Congress, the U.S. federal courts, the USPTO or similar authorities in foreign jurisdictions, the laws and regulations governing patents could change in unpredictable ways that may weaken our and our licensors’ ability to obtain new patents or to enforce existing patents we and our licensors or partners may obtain in the future.

Once granted, patents may remain open to opposition, interference, re-examination, post-grant review, inter partes review, nullification derivation and opposition proceedings in court or before patent offices or similar proceedings for a given period after allowance or grant, during which time third parties can raise objections against such initial grant. In the course of such proceedings, which may continue for a protracted period of time, the patent owner may be compelled to limit the scope of the allowed or granted claims thus attacked, or may lose the allowed or granted claims altogether.

If we do not obtain patent term extension and data exclusivity for any therapeutic candidate or product we may develop, our business may be materially harmed.

Depending upon the timing, duration, and specifics of any FDA marketing approval of any therapeutic candidate or product we may develop, one or more of our patents for momelotinib or our or in-licensed U.S. patents for our technologies may be eligible for limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984 (Hatch-Waxman Act). The Hatch-Waxman Act permits a patent term extension of up to five years as compensation for patent term lost during the FDA regulatory review process. A patent term extension cannot extend the remaining term of a patent beyond a total of 14 years from the date of product approval, only one patent may be extended and only those claims covering the approved drug, a method for using it, or a method for manufacturing it may be extended. Similar extensions as compensation for patent term lost during regulatory review processes are also available in certain foreign countries and territories, such as in Europe under a Supplementary Patent Certificate. However, we may not be granted an extension in the United States and/or foreign countries and territories because of, for example, failing to exercise due diligence during the testing phase or regulatory review process, failing to list eligible patents in the OrangeBook with the FDA within applicable deadlines, failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents, or otherwise failing to satisfy applicable requirements. Moreover, the applicable time period or the scope of patent protection afforded could be less than we request. If we are unable to obtain patent term extension or the term of any such extension is

shorter than what we request, our competitors may obtain approval of competing products following our patent expiration, and our business, financial condition, results of operations, and growth prospects could be materially harmed.

We or any future strategic partners may become subject to third-party claims or litigation alleging infringement of patents or other proprietary rights or seeking to invalidate patents or other proprietary rights.

We or any future strategic partners may be subject to third-party claims for infringement or misappropriation of patent or other proprietary rights that prevent us from developing and commercializing our products. If we, our licensors or any future strategic partners are found to infringe a third-party patent or other intellectual property rights, we could be required to pay substantial damages, potentially including treble damages and attorneys’ fees, if we are found to have willfully infringed. In addition, we or any future strategic partners may choose to seek, or be required to seek, a license from a third party, which may not be available on acceptable terms, if at all. Even if a license can be obtained on acceptable terms, the rights may be non-exclusive, which could give our competitors access to the same technology or intellectual property rights licensed to us. If we fail to obtain a required license, we may be unable to effectively market product candidates, which could limit our ability to generate revenue or achieve profitability and possibly prevent us from generating revenue sufficient to sustain our operations. Alternatively, we may need to redesign our infringing products, which may be impossible or require substantial time and monetary expenditure. In addition, we may find it necessary to pursue claims or initiate lawsuits to protect or enforce our patent or other intellectual property rights. The cost to us in defending or initiating any litigation or other proceeding relating to patent or other proprietary rights, even if resolved in our favor, could be substantial, and litigation would divert our management’s attention. Some of our competitors may be able to sustain the costs of

complex patent litigation more effectively than we can because they have substantially greater resources. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could delay our research and development efforts and limit our ability to continue our operations.

We may be involved in lawsuits to protect or enforce our patents, which could be expensive, time-consuming and unsuccessful.

Competitors may infringe our patents or the patents of our licensors. To counter infringement or unauthorized use, we may be required to file infringement claims, which can be expensive and time-consuming. If we were to initiate legal proceedings against a third party to enforce a patent covering one of our products or our technology, the defendant could counterclaim that our patent is invalid or unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, for example, lack of novelty, obviousness or non-enablement. Grounds for an unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld relevant information from the USPTO, or made a misleading statement, during prosecution. The outcome following legal assertions of invalidity and unenforceability during patent litigation is unpredictable. With respect to the validity question, for example, we cannot be certain that there is no invalidating prior art, of which we and the patent examiner were unaware during prosecution. If a defendant were to prevail on a legal assertion of invalidity or unenforceability, we would lose at least part, and perhaps all, of the patent protection on one or more of our products or certain aspects of our platform technology. Such a loss of patent protection could have a material adverse impact on our business. Patents and other intellectual property rights also will not protect our technology if competitors design around our protected technology without legally infringing our patents or other intellectual property rights.

In addition, in an infringement proceeding, a court may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation or defense proceedings could put one or more of our patents at risk of being invalidated, held unenforceable, or interpreted narrowly and could put our patent applications at risk of not issuing. Defense of these claims, regardless of their merit, would involve substantial litigation expense and would be a substantial diversion of employee resources from our business.

Interference proceedings provoked by third parties or brought by the USPTO may be necessary to determine the priority of inventions with respect to our patents or patent applications or those of our licensors. An unfavorable outcome could result in a loss of our current patent rights and could require us to cease using the related technology or to attempt to license rights to it from the prevailing party. Our business could be harmed if the prevailing party does not offer us a license on commercially reasonable terms. Litigation or interference proceedings may result in a decision adverse to our interests and, even if we are successful, may result in substantial costs and distract our management and other employees. We may not be able to prevent, alone or with our licensors, misappropriation of our trade secrets or confidential information, particularly in countries where the laws may not protect those rights as fully as in the United States.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock.

Obtaining and maintaining our patent protection depends on compliance with various procedural, document submission, fee payment and other requirements imposed by governmental patent agencies, and our patent protection could be reduced or eliminated for non-compliance with these requirements.

We have limited foreign intellectual property rights and may not be able to protect our intellectual property rights throughout the world.

We and our licensors or future licensors and licensees have limited intellectual property rights outside the United States. Filing, prosecuting and defending patents on product candidates in all countries throughout the world would be prohibitively expensive, and our intellectual property rights in some countries outside the United States can be less extensive than those in the United States. In addition, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the United States. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States, or from selling or importing products made using our inventions in and into the United States or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and further, may export otherwise infringing products to territories where we have patent protection, but enforcement is not as strong as that in the United States. These products may compete with our products and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents, trade secrets and other intellectual property protection, particularly those relating to oncology products, which could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims 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 meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

If we fail to comply with our obligations under our purchase agreement with Gilead, we may be required to pay damages.

In connection with our acquisition of momelotinib from Gilead, we are required to make aggregate milestone payments of up to $190.0 million to Gilead upon the achievement of certain regulatory and commercial milestones, including a milestone payment of $25.0 million due upon the approval of momelotinib from the FDA, as well as low double-digit to high-teens percent tiered combined royalties based upon net sales and additional tiered milestone payments upon reaching certain sales milestones. If we breach any of these obligations, we may be required to indemnify the Seller, subject to certain limitations set forth in the momelotinib purchase.

We may be subject to claims that our employees, consultants or independent contractors have wrongfully used or disclosed confidential information of third parties.

We have received confidential and proprietary information from third parties. In addition, we employ individuals who were previously employed at other oncology companies. We may be subject to claims that we or our employees, consultants or independent contractors have inadvertently or otherwise used or disclosed confidential information of these third parties or our employees’ former employers. Litigation may be necessary to defend against these claims. Even if we are successful in defending against these claims, litigation could result in substantial cost and be a distraction to our management and employees.

If our trademarks and trade names are not adequately protected, then we may not be able to build name recognition in our markets of interest and our business may be materially and adversely affected.

Our trademarks or trade names may be challenged, infringed, circumvented, or declared generic or determined to be infringing on other marks. Any trademark litigation could be expensive. We may not be able to protect our rights to these trademarks and trade names or may be forced to stop using these names, which we need for name recognition by potential partners or customers in our markets of interest. If we are unable to establish name recognition based on our trademarks and trade names, we may not be able to compete effectively, and our business may be materially and adversely affected.

The market price of our common stock has been and may continue to be volatile, and you may be unable to sell your shares at or above the price at which you purchased them.

The market price of our common stock has been and may continue to be subject to wide fluctuations. For example, we experienced a significant decrease in our stock price after we announced the suspension of the development of our former lead product candidate PNT2258 and the DNAi platform in June 2016 and after we announced the preliminary clinical data from our two Phase 1/2 studies of SRA737 in June 2019. In addition, the trading prices for our common stock and other biopharmaceutical companies have been highly volatile as a result of the COVID-19 pandemic. Factors affecting the market price of our common stock include, but are not limited to:

In addition, the stock market in general, and oncology companies in particular, have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of these companies. Broad market and industry factors may negatively affect the market price of our common stock, regardless of our actual operating performance. Securities class action litigation is often instituted against companies following periods of volatility in the market price of a company’s securities. For example, we have previously vigorously defended purported securities class action lawsuits against us and certain of our executive officers. This type of litigation could result in substantial costs and a diversion of management’s attention and resources, which could harm our business, operating results or financial condition.

Market volatility arising from the COVID-19 pandemic may lead to increased shareholder activism if we experience a market valuation that they believe are not reflective of their intrinsic value. Activist campaigns that contest or conflict with our strategic direction or seek changes in the composition of our board of directors could have an adverse effect on our operating results and financial condition.

The issuance or sale of shares of our common stock, or rights to acquire shares of our common stock could depress the trading price of our common stock.

We may conduct future offerings of our common stock, preferred stock or other securities that are convertible into or exercisable for our common stock to finance our operations or fund acquisitions, or for other purposes. For example, in November 2019, we conducted a public equity offering where we raised net proceeds of approximately $97.7 million in a substantially dilutive transaction to our pre-existing investors. In August 2020, we filed a prospectus supplement pursuant to which we issued and sold $20.0 million of our common stock in ATM offerings. In February 2021, we filed a prospectus supplement pursuant to which we can issue and sell an aggregate of up to an additional $30.0 million of our common stock from time to time in ATM offerings. In addition, on May 7, 2021, we filed a prospectus supplement, pursuant to which we can issue and sell an aggregate of up to an additional $50.0 million of our common stock from time to time in the ATM offerings. As of ~~June~~September 30, 2021, we sold ~~1,882,572~~3,990,037 shares under the ATM program (including the amounts sold under the prospectus supplement filed in August 2020) for net proceeds of ~~$28.5~~$64.3 million, net of commissions and offering expenses. If we issue additional shares of our common stock or rights to acquire shares of our common stock, if any of our existing stockholders sells a substantial amount of our common stock, or if the market perceives that such issuances or sales may occur, then the trading price of our common stock, and, accordingly, the trading price of our common stock may significantly decrease. In addition, our issuance of additional shares of common stock, including upon exercise of our outstanding warrants, will dilute the ownership interests of our existing common stockholders.

We have a significant number of outstanding warrants which may cause significant dilution to our stockholders, have a material adverse impact on the market price of our common stock, make it more difficult for us to raise funds through future equity offerings and discourage an acquisition of us by a third party.

As more fully described in Note 8. Stockholders’ Equity of the Notes to the Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q under the subheading “Common Stock Warrants,” we issued Series A warrants and Series B warrants in connection with the Company’s November 2019 public offering of Series A Preferred Stock and warrants to Gilead pursuant to the amendment to the Asset Purchase Agreement.

To the extent the warrants are exercised, additional shares of common stock will be issued and such issuance may dilute existing stockholders and increase the number of shares eligible for resale in the public market. Sales of substantial numbers of such shares in the public market could adversely affect the market price of our shares. In addition, the perceived risk of dilution as a result of the significant number of outstanding warrants may cause our common stockholders to be more inclined to sell their shares, which would contribute to a downward movement in the price of our common stock. Moreover, the perceived risk of dilution and the resulting downward pressure on our common stock price could encourage investors to engage in short sales of our common stock, which could further contribute to price declines in our common stock. The fact that our warrant holders can sell substantial amounts of our common stock in the public market could make it more difficult for us to raise additional funds through the sale of equity or equity-related securities in the future at a time and price that we deem reasonable or appropriate, or at all.

To the extent we issue shares of common stock to effect a business combination, the potential for the issuance of a substantial number of additional shares upon exercise of our warrants could make us a less attractive acquisition vehicle in the eyes of a target business since the exercise of warrants could reduce the value of the shares issued to complete the business combination. Accordingly, our warrants may make it more difficult to effectuate a business combination or increase the cost of acquiring the target business.

Further, our warrants could make the structuring of any strategic transaction more complex and affect the terms of any such strategic transaction. In connection with certain “fundamental transactions” involving a change in control of our company, the surviving entity is required to either (1) assume all of our obligations under the ~~warrants. In addition, if the acquiring company is not a public company, the warrant holders have the right to sell their~~ warrants ~~to the surviving entity for their Black-Scholes value for up to 30 days following~~or (2) deliver in connection with the closing of a fundamental transaction in exchange for the ~~fundamental transaction.~~cancellation of the warrants, consideration equal in value to the Black-Scholes value of the remaining unexercised portion of the warrants, with an assumed volatility of 100%. These provisions could deter a third party from acquiring us even where the acquisition could be beneficial to you. Any negotiated alternative to such treatment of the warrants would require the approval of the holders of warrants exercisable for the majority of the shares underlying the warrants. Four of our ~~nine~~eleven directors are affiliated with investors that hold a majority-in-interest of the Series A warrants. The holders of warrants could exercise their rights under the warrants in a manner that benefits their interests relative to the holders of common stock generally.

We incur significantly increased costs and devote substantial management time as a result of operating as a public company.

As a public company, we incur significant legal, accounting and other expenses that we did not incur as a private company. The Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of the stock exchange upon which our common stock is listed and other applicable securities rules and regulations impose various requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance practices. Our management and other personnel devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations increase our legal and financial compliance costs and make some activities more time-consuming and costly. However, these rules and regulations are often subject to varying interpretations, in many cases due to their lack of specificity, and, as

a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices.

Pursuant to Section 404, we are required to furnish a report by our management on our internal control over financial reporting. However, while we remain a non-accelerated filer, we will not be required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm. To achieve compliance with Section 404 within the prescribed period, we are engaged in a process to document and evaluate our internal control over financial reporting, which is both costly and challenging. In this regard, we will need to continue to dedicate internal resources, potentially engage outside consultants and adopt a detailed work plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control processes as appropriate, validate through testing that controls are functioning as documented and implement a continuous reporting and improvement process for internal control over financial reporting. Despite our efforts, there is a risk that we will not be able to conclude, within the prescribed timeframe or at all, that our internal control over financial reporting is effective as required by Section 404.

In addition, since it has been more than five years since we completed our initial public offering, we are no longer an “emerging growth company” and may no longer take advantage of certain exemptions from various reporting requirements that are applicable to other public companies. This increase in reporting requirements will further increase our compliance burden. As a “smaller reporting company,” however, we are still able to take advantage of certain exemptions available to both emerging growth companies and smaller reporting companies.

We have in the past and may in the future identify material weaknesses or significant deficiencies in internal control over financial reporting. Under standards established by the Public Company Accounting Oversight Board, a deficiency in internal control over financial reporting exists when the design or operation of a control does not allow management or personnel, in the normal course of performing their assigned functions, to prevent or detect misstatements on a timely basis. A material weakness is a deficiency or combination of deficiencies in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected and corrected on a timely basis. We cannot assure you that there will not be additional material weaknesses or significant deficiencies that our independent registered public accounting firm or we will identify. If we identify such issues or if we are unable to produce accurate and timely financial statements, our stock price may be adversely affected and we may be unable to maintain compliance with the Nasdaq Stock Market listing requirements.

Provisions in our restated certificate of incorporation and restated bylaws and Delaware law might discourage, delay or prevent a change in control of our company or changes in our management and, therefore, depress the market price of our common stock.

Our restated certificate of incorporation and restated bylaws contain provisions that could depress the market price of our common stock by acting to discourage, delay or prevent a change in control of our company or changes in our management that the stockholders of our company may deem advantageous. These provisions, among other things:

In addition, Section 203 of the Delaware General Corporation Law may discourage, delay or prevent a change in control of our company. Section 203 imposes certain restrictions on mergers, business combinations and other transactions between us and holders of 15% or more of our common stock.

Section 22 of the Securities Act of 1933, as amended (the Securities Act), creates concurrent jurisdiction for federal and state courts over all claims brought to enforce any duty or liability created by the Securities Act or the rules and regulations thereunder. In April 2020, we amended and restated our restated bylaws to provide that the federal district courts of the United States of America will, to the fullest extent permitted by law, be the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act (a Federal Forum Provision). Our decision to adopt a Federal Forum Provision followed a decision by the Supreme Court of the State of Delaware holding that such provisions are facially valid under Delaware law. While there can be no assurance that federal or state courts will follow the holding of the Delaware Supreme Court or determine that the Federal Forum Provision should be enforced in a particular case, application of the Federal Forum Provision means that suits brought by our stockholders to enforce any duty or liability created by the Securities Act must be brought in federal court and cannot be brought in state court.

Section 27 of the Exchange Act creates exclusive federal jurisdiction over all claims brought to enforce any duty or liability created by the Exchange Act or the rules and regulations thereunder. In addition, neither the exclusive forum provision nor the Federal Forum Provision applies to suits brought to enforce any duty or liability created by the Exchange Act. Accordingly, actions by our stockholders to enforce any duty or liability created by the Exchange Act or the rules and regulations thereunder must be brought in federal court.

Our stockholders will not be deemed to have waived our compliance with the federal securities laws and the regulations promulgated thereunder.

Any person or entity purchasing or otherwise acquiring or holding any interest in any of our securities shall be deemed to have notice of and consented to our exclusive forum provisions, including the Federal Forum Provision. These provisions may limit a stockholders’ ability to bring a claim in a judicial forum of their choosing for disputes with us or our directors, officers, or other employees, which may discourage lawsuits against us and our directors, officers, and other employees.

Certain of our 5% stockholders in the aggregate hold a majority of the voting power and may therefore, in effect, be able to exert significant control over matters subject to stockholder approval.

As of ~~June~~September 30, 2021, our executive officers, directors and 5% stockholders collectively beneficially owned a majority of our outstanding voting shares. Four of our current directors are each affiliates of certain 5% stockholders. As of ~~June~~September 30, 2021, these 5% stockholders collectively beneficially own ~~46.5%~~39.6% of the voting power of our company and 73.2% of the shares underlying the Series A and Series B warrants. Therefore, if such holders acted in concert, these holders may have the ability to influence us through their ownership position and through representation on our board of directors. For example, numerically, these holders may be able to determine the outcome of votes with respect to elections of directors, amendments of our organizational documents, or approval of any merger, sale of assets, or other major corporate transaction. They also have contractual rights under the warrants that they may exercise in a manner that adversely impacts the interest of holders of capital stock that do not hold warrants. This concentrated ownership may prevent or discourage unsolicited acquisition proposals or offers for our common stock.

We may be unable to adequately protect our information technology systems from cyberattacks, which could result in the disclosure of confidential information, damage our reputation, and subject us to significant financial and legal exposure.

Cyberattacks upon systems, across industries, are increasing in their frequency, persistence, and sophistication, and are being conducted by sophisticated, well-funded, and organized groups and individuals. These cyberattacks may occur on our systems or those of our CROs or other third-party providers or partners. Additionally, certain threats are designed to remain dormant or undetectable until launched against a target and we may not be able to implement adequate preventative measures. Such cyberattacks could include wrongful conduct by hostile foreign governments, industrial espionage, the deployment of harmful malware, ransomware attacks, denial-of-service, and/or other means to threaten data confidentiality, integrity and availability. Those engaging in attacks may implement social engineering techniques to induce our employees or contractors to disclose passwords or other sensitive information or take other actions to gain improper access to data or systems. Further, we engage third-party service providers to store and otherwise process sensitive and personal information, including our CROs. Our CROs and other service providers and partners face substantial risks of security breaches and incidents. Security breaches and other security incidents may result from malfeasance, error or negligence of our employees, contractors, CROs or other service providers or partners. A successful cyberattack could cause serious negative consequences for us, including, without limitation, the disruption of operations, the loss or misappropriation of confidential business information and trade secrets, unauthorized access to or other compromise of personal information or other sensitive information, and the disclosure of corporate strategic plans. We have in the past experienced, and may in the future experience, a compromise of our data or information technology systems, or one or more other events, including employee or contractor error or malfeasance, that results in unauthorized access to, or acquisition, use, or disclosure of, confidential or proprietary information about our company or sensitive information about individuals, such as employees or clinical trial participants, including PHI and other types of personal information. Although we devote resources to protect our information technology systems and continue to assess and, as necessitated, enhance our cybersecurity protection, we realize that cyberattacks and other causes of security breaches and incidents are a threat, and there can be no assurance that our efforts will prevent information security breaches or

incidents we or those who maintain or process data on our behalf, including CROs and other contractors and consultants, may suffer that would result in business, legal or reputational harm to us, or would have a material adverse effect on our operating results and financial condition. We also may be required to incur significant costs in an effort to detect and prevent security breaches and other security-related incidents. Confidential information obtained by third parties in connection with past or future attacks could be used in ways that adversely affect our company or our stockholders. The majority of our workforce works remotely rather than in our offices, and we may be more susceptible to security breaches and incidents as a result. Our service providers may be more susceptible to security breaches and other security incidents while social distancing measures restrict the ability of their employees to work at offices to combat the COVID-19 pandemic. Depending on the nature of any information compromised, in the event of a data breach or other unauthorized access to our sensitive information, we may also have obligations to notify affected individuals and regulators about the incident, and we may be required or find it appropriate to provide some form of remedy, such as a subscription to credit monitoring services, pay significant fines to one or more regulators, or pay compensation in connection with a class-action settlement (including under the private right of action under the California Consumer Privacy Act of 2018 (the CCPA)). Laws and regulations relating to cybersecurity and notification and other obligations in connection with security breaches and incidents continue to evolve and may be inconsistent from one jurisdiction to another. Complying with these obligations and otherwise responding to any security breach or incident could cause us to incur substantial costs and could increase negative publicity surrounding any incident that compromises, or is perceived to have compromised, sensitive data.

While our insurance policies include liability coverage for certain of these matters, subject to applicable deductibles, our insurance coverage might not be adequate for data handling or data security liabilities actually incurred, such insurance may not continue to be available to us in the future on economically reasonable terms, or at all, and insurers may deny us coverage as to any future claim. The successful assertion of one or more large claims against us that exceed available insurance coverage, or the occurrence of changes in our insurance policies, including premium increases or the imposition of large deductible or co-insurance requirements, could have a material adverse effect on our business, including our financial condition, operating results, and reputation.

Business disruptions could seriously harm our future revenue and financial condition and increase our costs and expenses.

Our operations, and those of our CROs and other contractors and consultants, could be subject to earthquakes, power shortages, telecommunications failures, water shortages, floods, hurricanes, typhoons, fires, extreme weather conditions, medical epidemic, such as the COVID-19 pandemic, and other natural or man-made disasters or business interruptions, for which we may not have insurance coverage. The occurrence of any of these business disruptions could seriously harm our operations and financial condition and increase our costs and expenses. In particular, the potential effects on our business due to the COVID-19 pandemic may be significant and could materially harm our business, operating results and financial condition. We rely on third-party manufacturers to produce and process momelotinib. Our ability to obtain supplies of momelotinib could be disrupted if the operations of these suppliers are affected by a man-made or natural disaster or other business interruption. Our corporate headquarters are located in San Mateo, California, which is near a major earthquake fault. Our operations and financial condition could suffer in the event of a major earthquake or other natural disaster near any of our locations.

We face risks related to securities litigation that could result in significant legal expenses and settlement or damage awards.

We have in the past and may in the future become subject to claims and litigation alleging violations of the securities laws or other related claims, which could harm our business and require us to incur significant costs. Any future litigation may require significant attention from management and could result in significant legal expenses, settlement costs or damage awards that could have a material impact on our financial position, results of operations and cash flows.

Changes in interpretation or application of generally accepted accounting principles may adversely affect our operating results.

We prepare our financial statements to conform to United States Generally Accepted Accounting Principles. These principles are subject to interpretation by the Financial Accounting Standards Board, American Institute of Certified Public Accountants, the Public Company Accounting Oversight Board, the Securities and Exchange Commission and various other regulatory or accounting bodies. A change in interpretations of, or our application of, these principles can have a significant effect on our reported results and may even affect our reporting of transactions completed before a change is announced. Additionally, as we are required to adopt new accounting standards, our methods of accounting for certain items may change, which could cause our results of operations to fluctuate from period to period.

We do not intend to pay dividends on our common stock so any returns will be limited to the value of our stock.

We currently anticipate that we will retain future earnings for the development, operation and expansion of our business and do not anticipate declaring or paying any cash dividends for the foreseeable future. Any return to stockholders will therefore be limited to the appreciation of their stock.

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 research and reports that securities or industry analysts publish about us or our business. If one or more of the securities or industry analysts who publish research about us downgrade our stock or publish inaccurate or unfavorable evaluations of our company or our stock, the price of our stock could decline. If one or more of these analysts cease coverage of our company, our stock may lose visibility in the market, which in turn could cause our stock price to decline.

The exhibits filed or furnished as part of this Quarterly Report on Form 10-Q are set forth below. Where so indicated, exhibits that were previously filed are incorporated by reference. For exhibits incorporated by reference, the location of the exhibit in the previous filing is indicated.

Incorporated by Reference

Exhibit

Number

Exhibit Description

Form

File No.

Exhibit

No.

Exhibit

Filing Date

Filed/Furnished

Herewith

10.1+

License Agreement dated August 3, 2021 by and between the Registrant and AstraZeneca AB.

31.1

Certification of Principal Executive Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2

Certification of Principal Financial Officer, pursuant to Rule 13a-14(a)/15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1*

Certification of Chief Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2*

Certification of Chief Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

101.INS

Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

101.SCH

Inline XBRL Taxonomy Extension Schema Document.

101.CAL

Inline XBRL Taxonomy Extension Calculation Linkbase Document.

101.DEF

Inline XBRL Taxonomy Extension Definition Linkbase Document.

101.LAB

Inline XBRL Taxonomy Extension Labels Linkbase Document.

101.PRE

Inline XBRL Taxonomy Extension Presentation Linkbase Document.

104

The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended ~~June~~September 30, 2021 has been formatted in Inline XBRL.

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.

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, $0.001 par value		SRRA		The Nasdaq Global Market

	Page
Part I. Financial Information

Item 1. Condensed Consolidated Financial Statements (unaudited)	2
Condensed Consolidated Balance Sheets	2
Condensed Consolidated Statements of Operations and Comprehensive Loss	3
Condensed Consolidated Statements of Stockholders’ Equity	4
Condensed Consolidated Statements of Cash Flows	5
Notes to Condensed Consolidated Financial Statements	6
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	16
Item 3. Quantitative and Qualitative Disclosures About Market Risk	24
Item 4. Controls and Procedures	24

Part II. Other Information

Item 1. Legal Proceedings	25
Item 1A. Risk Factors	25
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	67
Item 3. Defaults Upon Senior Securities	67
Item 4. Mine Safety Disclosures	67
Item 5. Other Information	67
Item 6. Exhibits	68
Signatures	69

		SIERRA ONCOLOGY, INC.

Date:	~~August~~November 5, 2021	By:	/s/ Stephen G. Dilly
			Stephen G. Dilly
			President and Chief Executive Officer
			(Principal Executive Officer)

Date:	~~August~~November 5, 2021	By:	/s/ Sukhi Jagpal
			Sukhi Jagpal
			Chief Financial Officer
			(Principal Financial Officer)

	December 31, 2020
	Level 1		Level 2		Level 3		Total
	(in thousands)
Financial Assets
Money market funds	$	101,919	$	—	$	—	$	101,919
Restricted money market funds		300		—		—		300
Total financial assets	$	102,219	$	—	$	—	$	102,219

	Series A Warrant			Series B Warrant
Expected term (in years)		5.0			2.1
Expected volatility		43	%		88	%
Risk-free interest rate		1.57	%		1.53	%
Expected dividend yield		—	%		—	%

	Warrant Issuance Obligation
Expected term (in years)		5.0
Expected volatility		43	%
Risk-free interest rate		1.57	%
Expected dividend yield	— %

Large accelerated filer

Accelerated filer

Non-accelerated filer

Smaller reporting company

Emerging growth company