UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)



ý☒			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, ~~2019~~2020



☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 001-37471

PIERIS PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)



~~Nevada~~

	~~30-0784346~~
Nevada			30-0784346
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No.)

255 State Street		9th Floor ~~Boston, MA~~ ~~United States~~	~~02109~~
Boston,		MA
United States			02109
(Address of principal executive offices)			(Zip Code)

857-246-8998

Registrant’s telephone number, including area code

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Trading Symbol

Name of Each Exchange on Which Registered

Common Stock, $0.001 par value per share

PIRS

The Nasdaq Capital Market

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 ý☒ No ☐

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 ý ☒No ☐

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

Large accelerated filer

☐

Accelerated filer

☒

Non-accelerated filer

☐

Smaller reporting company

☒

~~Large accelerated filer~~

☐

~~Accelerated filer~~

~~Non-accelerated filer~~

☐

~~Smaller reporting company~~

Emerging growth company

☐

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

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

As of ~~November 7, 2019,~~October 30, 2020, the registrant had ~~54,975,666~~55,970,580 shares of common stock outstanding.

TABLE OF CONTENTS



			Page
PART I: FINANCIAL INFORMATION
Item 1. Financial Statements (unaudited)			1
Condensed Consolidated Balance Sheets as of September 30, ~~2019~~2020 and December 31, ~~2018~~2019			1
Condensed Consolidated Statements of Operations and Comprehensive Loss for the Three and Nine Months ended September 30, ~~2019~~2020 and ~~2018~~2019			2
Condensed Consolidated Statements of Changes in Stockholders' Equity for the Three and Nine Months ended September 30, ~~2019~~2020 and ~~2018~~2019			3
Condensed Consolidated Statements of Cash Flows for the Nine Months ended September 30, ~~2019~~2020 and ~~2018~~2019			5
Notes to the Condensed Consolidated Financial Statements			6
Item 2. Management´s Discussion and Analysis of Financial Condition and Results of Operations			26
Item 3. Quantitative and Qualitative Disclosures about Market Risk			34
Item 4. Controls and Procedures			34
PART II: OTHER INFORMATION
Item 1. Legal Proceedings			36
Item 1A. Risk Factors			36
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds			36
Item 3. Defaults Upon Senior Securities			36
Item 4. Mine Safety Disclosures			36
Item 5. Other Information			36
Item 6. Exhibits			36
SIGNATURES			3839

Special Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, ~~or the Securities Act,~~ and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, that involve risks and uncertainties, principally in the section entitled “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” All statements other than statements of historical fact contained in this Quarterly Report on Form 10-Q, including statements regarding future events, our future financial performance, expectations for growth and revenues, anticipated timing and amounts of milestone and other payments under collaboration agreements, business strategy and plans, objectives of management for future operations, timing and outcome of legal and other proceedings, and our ability to finance our operations are forward-looking statements. We have attempted to identify forward-looking statements by terminology including “anticipates,” “believes,” “can,” “continue,” “look forward,” “ongoing,” “could,” “estimates,” “expects,” “intends,” “may,” “appears,” “suggests,” “future,” “likely,” “plans,” “potential,” “possibly,” “projects,” “predicts,” “seek,” “should,” “target,” “would” or “will” or the negative of these terms or other comparable terminology. Although we do not make forward-looking statements unless we believe we have a reasonable basis for doing so, we cannot guarantee their accuracy. These statements are only predictions and involve known and unknown risks, uncertainties and other factors, including the risks outlined under “Risk Factors” or elsewhere in our most recent Annual Report on Form 10-K or Quarterly Reports on Form 10-Q, which may cause our or our industry’s actual results, levels of activity, performance or achievements expressed or implied by these forward-looking statements to differ materially.

Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time and it is not possible for us to predict all risk factors, nor can we address the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause our actual results to differ materially from those contained in any forward-looking statements. Actual results could differ materially from our forward-looking statements due to a number of factors, including, without limitation, risks related to: the results of our research and development activities, including uncertainties relating to the discovery of potential drug candidates and the preclinical and ongoing or planned clinical testing of our drug candidates; the early stage of our drug candidates presently under development; our ability to obtain and, if obtained, maintain regulatory approval of our current drug candidates and any of our other future drug candidates; our need for substantial additional funds in order to continue our operations and the uncertainty of whether we will be able to obtain the funding we need; our future financial performance; our ability to retain or hire key scientific or management personnel; our ability to protect our intellectual property rights that are valuable to our business, including patent and other intellectual property rights; our dependence on third-party manufacturers, suppliers, research organizations, testing laboratories and other potential collaborators; the success of our collaborations with third parties; our ability to meet milestones; our ability to successfully market and sell our drug candidates in the future as needed; the size and growth of the potential markets for any of our approved drug candidates, and the rate and degree of market acceptance of any of our approved drug candidates; competition in our industry; regulatory developments in the United States and foreign ~~countries;~~countries, including the U.S. Food and Drug Administration’s, or FDA’s, views as to the outcome of, the additional in-use and compatibility study for PRS-343 as requested by the FDA in July 2020, and the resolution of the partial clinical hold relating to that drug candidate; the expected impact of new accounting ~~standards.~~standards; and the length and severity of the pandemic relating to SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), or coronavirus, which causes coronavirus disease 2019, or COVID-19, which could have an impact on our research, development, supply chain, and clinical trials.

You should not place undue reliance on any forward-looking statement(s), each of which applies only as of the date of this Quarterly Report on Form 10-Q. Before you invest in our securities, you should be aware that the occurrence of the events described in Part I, Item 1A (Risk Factors) of our Annual Report on Form 10-K for the fiscal year ended December 31, ~~2018~~2019 filed with the Securities and Exchange Commission, or SEC, on March ~~18, 2019,~~13, 2020, as well as those in Part II, Item 1A (Risk Factors) of our Quarterly Reports on Form 10-Q, for the fiscal quarters ended March 31, 2020 and June 30, 2020, filed with the SEC on May 11, 2020, and August 10, 2020, respectively, could negatively affect our business, operating results, financial condition and stock price. All forward-looking statements included in this document are based on information available to us on the date hereof, and except as required by law, we undertake no obligation to update or revise publicly any of the forward-looking statements after the date of this Quarterly Report on Form 10-Q to conform our statements to actual results or changed expectations.

Currency Presentation and Currency Translation

Unless otherwise indicated, all references to “dollars,” “$,” “U.S. $” or “U.S. dollars” are to the lawful currency of the United States. All references in this Quarterly Report on Form 10-Q to “euro” or “€” are to the currency introduced at the start of the third stage of the European Economic and Monetary Union pursuant to the Treaty establishing the European Community, as amended. We prepare our financial statements in U.S. dollars.

The functional currency for our operations is primarily the euro. With respect to our financial statements, the translation from the euro to U.S. dollars is performed for balance sheet accounts using exchange rates in effect at the balance sheet date and for

revenue and expense accounts using a weighted average exchange rate during the period. The resulting translation adjustments are recorded as a component of accumulated other comprehensive income/loss.

Where in this Quarterly Report on Form 10-Q we refer to amounts in euros, we have for your convenience also, in certain cases, provided a conversion of those amounts to U.S. dollars in parentheses. Where the numbers refer to a specific balance sheet account date or financial statement account period, we have used the exchange rate that was used to perform the conversions in connection with the applicable financial statement. In all other instances, unless otherwise indicated, the conversions have been made using the noon buying rate of €1.00 to U.S. ~~$1.0918~~$1.1699 based on information provided by Thomson Reuters as of September 30, ~~2019.~~2020.

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements.

PIERIS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

~~(unaudited)~~(unaudited, in thousands)

~~(in thousands, except share and per share data)~~


	September 30			December 31,				September 30,		December 31,
	2019			2018				2020		2019
Assets							Assets
Current assets:							Current assets:
Cash and cash equivalents	$	46,068		$	74,867		Cash and cash equivalents	$	66,890	$	62,260
Short term investments	40,175			53,240			Short term investments	15,750		41,894
Accounts receivable	6,952			2,701			Accounts receivable	2,944		6,787
Prepaid expenses and other current assets	4,778			4,574			Prepaid expenses and other current assets	3,074		4,072
Total current assets	97,973			135,382			Total current assets	88,658		115,013
Property and equipment, net	11,008			5,049			Property and equipment, net	21,395		19,502
Operating lease right-of-use assets							Operating lease right-of-use assets	3,678		3,436
Other non-current assets	7,770			910			Other non-current assets	1,993		3,146
Total assets	$	116,751		$	141,341		Total assets	$	115,724	$	141,097
Liabilities and stockholders’ equity							Liabilities and stockholders’ equity
Current liabilities:							Current liabilities:
Accounts payable	$	5,436		$	3,350		Accounts payable	$	2,154	$	5,803
Accrued expenses and other current liabilities	7,170			9,114			Accrued expenses and other current liabilities	7,488		9,944
Deferred revenues, current portion	27,242			35,612			Deferred revenues, current portion	10,045		11,256
Total current liabilities	39,848			48,076			Total current liabilities	19,687		27,003
Deferred revenue, net of current portion	44,179			53,303			Deferred revenue, net of current portion	36,919		47,258
Other long-term liabilities	12,082			27
Operating lease liabilities							Operating lease liabilities	15,427		15,484

Total liabilities	96,109			101,406			Total liabilities	72,033		89,745
Stockholders’ equity:							Stockholders’ equity:
Preferred stock, $0.001 par value per share, 10,000,000 shares authorized at September 30, 2019 and December 31, 2018, respectively
Series A Convertible, 2,907 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	—			—
Series B Convertible, 5,000 shares issued and outstanding at September 30, 2019. No shares issued and outstanding at December 31, 2018.	—			—
Common stock, $0.001 par value per share, 300,000,000 shares authorized and 49,392,706 and 54,151,219 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	49			54
Preferred stock							Preferred stock	0		0

Common stock							Common stock	56		55
Additional paid-in capital	194,695			189,929			Additional paid-in capital	241,423		227,468
Accumulated other comprehensive loss	(697		)	(2,982		)	Accumulated other comprehensive loss	(782)		(1,995)
Accumulated deficit	(173,405		)	(147,066		)	Accumulated deficit	(197,006)		(174,176)
Total stockholders’ equity	20,642			39,935			Total stockholders’ equity	43,691		51,352
Total liabilities and stockholders’ equity	$	116,751		$	141,341		Total liabilities and stockholders’ equity	$	115,724	$	141,097

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

PIERIS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(unaudited)

(in thousands, except per share data)


	Three Months Ended September 30						Nine Months Ended September 30							Three Months Ended September 30,				Nine Months Ended September 30,
	2019			2018			2019			2018				2020		2019		2020		2019
Revenue	$	15,132		$	8,345		$	29,009		$	24,187		Revenue
Customer revenue													Customer revenue	$	2,578	$	3,589	$	22,393	$	15,538
Collaboration revenue													Collaboration revenue	361		11,543		5,053		13,471
Total revenue													Total revenue	2,939		15,132		27,446		29,009
Operating expenses													Operating expenses
Research and development	13,211			11,401			40,880			28,492			Research and development	11,822		13,211		35,913		40,880
General and administrative	4,835			4,748			13,956			13,878			General and administrative	4,116		4,835		13,043		13,956
Total operating expenses	18,046			16,149			54,836			42,370			Total operating expenses	15,938		18,046		48,956		54,836
Loss from operations	(2,914		)	(7,804		)	(25,827		)	(18,183		)	Loss from operations	(12,999)		(2,914)		(21,510)		(25,827)
Other income (expense)													Other income (expense)
Interest income	377			504			1,332			1,491			Interest income	55		377		503		1,332
Other income (expense), net	(55		)	1,147			(203		)	1,472
Loss before income taxes	(2,592		)	(6,153		)	(24,698		)	(15,220		)
Income tax benefit	—			—			—			(148		)
Other expense													Other expense	(1,339)		(55)		(1,823)		(203)

Net loss	$	(2,592	)	$	(6,153	)	$	(24,698	)	$	(15,072	)	Net loss	$	(14,283)	$	(2,592)	$	(22,830)	$	(24,698)

Other comprehensive income (loss):
Other comprehensive income:													Other comprehensive income:
Foreign currency translation	1,636			27			1,908			546			Foreign currency translation	632		1,636		1,462		1,908
Unrealized (loss) gain on available-for-sale securities	374			(506		)	377			1,096			Unrealized (loss) gain on available-for-sale securities	(350)		374		(249)		377
Comprehensive (loss) income	$	(582	)	$	(6,632	)	$	(22,413	)	$	(13,430	)
Comprehensive loss													Comprehensive loss	$	(14,001)	$	(582)	$	(21,617)	$	(22,413)
Net loss per share													Net loss per share
Basic and diluted	$	(0.05	)	$	(0.11	)	$	(0.50	)	$	(0.29	)	Basic and diluted	$	(0.26)	$	(0.05)	$	(0.42)	$	(0.50)
Weighted average number of common shares outstanding													Weighted average number of common shares outstanding
Basic and diluted	49,353			54,089			49,805			52,721			Basic and diluted	54,340		49,353		53,976		49,805

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

PIERIS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

~~(unaudited)~~

(unaudited, in thousands)

For the Three Months Ended September 30, 2019 and 2020

Series A convertible
preferred shares

Series B convertible
preferred shares
Common shares
Additional
paid-in
capital

Accumulated
other
comprehensive
loss

Accumulated
deficit
Total Stockholders' equity

No. of
shares

Share
capital

No. of
shares

Share
capital

No. of
shares

Share
capital

Balance as of June 30, 2018 2,907
$ —
—
—
54,008
$ 54
$ 187,066
$ (2,574 ) $ (129,231 ) $ 55,315
Net loss —
—
—
—
—
—
—
—
(6,153 ) (6,153 )
Foreign currency translation adjustment —
—
—
—
—
—
—
27
—
27
Unrealized gains/(losses) on investments —
—
—
—
—
—
—
(506 ) —
(506 )
Stock based compensation expense —
—
—
—
—
—
1,302
—
—
1,302
Issuance of common stock resulting from exercise of stock options —
—
—
—
76
—
144
—
—
144
Issuance of common stock resulting from exercise of warrants —
—
—
—
66
—
132
—
—
132
Balance as of September 30, 2018 2,907
$ —
—
$ —
54,150
$ 54
$ 188,644
$ (3,053 ) $ (135,384 ) $ 50,261

Balance as of June 30, 2019 2,907
$ —
5,000
—
49,262
$ 49
$ 192,956
$ (2,707 ) $ (170,813 ) $ 19,485
Net loss —
—
—
—
—
—
—
—
(2,592 ) (2,592 )
Foreign currency translation adjustment —
—
—
—
—
—
—
1,636
—
1,636
Unrealized gains/(losses) on investments —
—
—
—
—
—
—
374
—
374
Stock based compensation expense —
—
—
—
—
—
1,518
—
—
1,518
Issuance of common stock resulting from exercise of stock options —
—
—
—
61
—
121
—
—
121
Issuance of common stock resulting from exercise of warrants —
—
—
—
70
—
100
—
—
100
Balance as of September 30, 2019 2,907
$ —
5,000
$ —
49,393
$ 49
$ 194,695
$ (697 ) $ (173,405 ) $ 20,642

~~PIERIS PHARMACEUTICALS, INC.~~

~~CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY~~

~~(unaudited)~~

~~(in thousands)~~

~~For the Nine Months Ended September 30~~


																										Preferred shares			Common shares	Additional paid-in capital	Accumulated other comprehensive loss		Accumulated deficit		Total Stockholders' equity
	Series A convertible preferred shares				Series B convertible preferred shares			Common shares					Additional paid-in capital			Accumulated other comprehensive loss			Accumulated deficit			Total stockholders' equity				No. of shares	Share capital										No. of shares			Share capital
Balance as of June 30, 2019																									Balance as of June 30, 2019	8	$	0		49,262	$	49	$	192,956	$	(2,707)		$	(170,813)		$	19,485
	No. of shares		Share capital		No. of shares	Share capital		No. of shares		Share capital			Additional paid-in capital			Accumulated other comprehensive loss			Accumulated deficit			Total stockholders' equity
Balance as of December 31, 2017	4,963		$	—	—	—		45,017		$	45
Net loss	—		—		—	—		—		—			—			—			(15,072		)	(15,072		)	Net loss	—	—			—	—		—		—			(2,592)			(2,592)
Foreign currency translation adjustment	—		—		—	—		—		—			—			546			—			546			Foreign currency translation adjustment	—	—			—	—		—		1,636			—			1,636
Unrealized gains/(losses) on investments	—		—		—	—		—		—			—			1,096			—			1,096
Unrealized gains on investments																									Unrealized gains on investments	—	—			—	—		—		374			—			374
Stock based compensation expense	—		—		—	—		—		—			3,666			—			—			3,666			Stock based compensation expense	—	—			—	—		1,518		—			—			1,518
Issuance of common stock resulting from exercise of stock options	—		—		—	—		595		1			982			—			—			983			Issuance of common stock resulting from exercise of stock options	—	—			61	—		121		—			—			121

Issuance of common stock resulting from exercise of warrants	—		—		—	—		157		—			313			—			—			313			Issuance of common stock resulting from exercise of warrants	—	—			70	—		100		—			—			100
Issuance of common stock net $3,374 in offering costs	—		—		—	—		6,325		6			47,201			—			—			47,207
Preferred stock conversion	(2,056	)	—		—	—		2,056		2			(2		)	—			—			—
Balance as of September 30, 2018	2,907		$	—	—	$	—	54,150		$	54		$	188,644		$	(3,053	)	$	(135,384	)	$	50,261

Balance as of December 31, 2018	2,907		$	—	—	—		54,151		$	54		$	189,929		$	(2,982	)	$	(147,066	)	$	39,935
Change in Retained Earnings from adoption of ASC 606	—		—		—	—		—		—			—			—			(1,641		)	(1,641		)
Balance as of September 30, 2019																									Balance as of September 30, 2019	8	$	0		49,393	$	49	$	194,695	$	(697)		$	(173,405)		$	20,642

Balance as of June 30, 2020																									Balance as of June 30, 2020	14	$	0		52,399	$	52	$	230,407	$	(1,064)		$	(182,723)		$	46,672
Net loss	—		—		—	—		—		—			—			—			(24,698		)	(24,698		)	Net loss	—	—			—	—		—		—			(14,283)			(14,283)
Foreign currency translation adjustment	—		—		—	—		—		—			—			1,908			—			1,908			Foreign currency translation adjustment	—	—			—	—		—		632			—			632
Unrealized gains/(losses) on investments, net of $0.1 million of tax	—		—		—	—		—		—			—			377			—			377
Unrealized loss on investments																									Unrealized loss on investments	—	—			—	—		—		(350)			—			(350)
Stock based compensation expense	—		—		—	—		—		—			4,260			—			—			4,260			Stock based compensation expense	—	—			—	—		1,396		—			—			1,396
Issuance of common stock resulting from exercise of stock options	—		—		—	—		111		—			218			—			—			218
Issuance of common stock from employee stock purchase plan	—		—		—	—		58		—			178			—			—			178
Issuance of common stock resulting from exercise of warrants	—		—		—	—		73		—			105			—			—			105
Preferred stock conversion	—		—		5,000	—		(5,000	)	(5		)	5			—			—			—
Balance as of September 30, 2019	2,907		$	—	5,000	$	—	49,393		$	49		$	194,695		$	(697	)	$	(173,405	)	$	20,642

Issuance of common stock pursuant to at the market offering program, net of $0.4 million in offering costs																									Issuance of common stock pursuant to at the market offering program, net of $0.4 million in offering costs	—	—			3,571	4		9,620		—			—			9,624

Balance as of September 30, 2020																									Balance as of September 30, 2020	14	$	0		55,971	$	56	$	241,423	$	(782)		$	(197,006)		$	43,691

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

PIERIS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(unaudited, in thousands)

For the Nine Months Ended September 30, 2019 and 2020


	Preferred shares			Common shares	Additional paid-in capital	Accumulated other comprehensive loss		Accumulated deficit		Total Stockholders' equity
	No. of shares	Share capital										No. of shares			Share capital
Balance as of December 31, 2018	3	$	0		54,151	$	54	$	189,929	$	(2,982)		$	(147,066)		$	39,935
Change in Retained Earnings from adoption of ASC 606	—	—			—	—		—		—			(1,641)			(1,641)
Net loss	—	—			—	—		—		—			(24,698)			(24,698)
Foreign currency translation adjustment	—	—			—	—		—		1,908			—			1,908
Unrealized gain on investments	—	—			—	—		—		377			—			377
Stock based compensation expense	—	—			—	—		4,260		—			—			4,260
Issuance of common stock resulting from exercise of stock options	—	—			111	—		218		—			—			218
Issuance of common stock resulting from purchase of employee stock purchase plan shares	—	—			58	—		178		—			—			178
Issuance of common stock resulting from exercise of warrants	—	—			73	—		105		—			—			105
Preferred stock conversion	5	—			(5,000)	(5)		5		—			—			0
Balance as of September 30, 2019	8	$	0		49,393	$	49	$	194,695	$	(697)		$	(173,405)		$	20,642

Balance as of December 31, 2019	11	$	0		55,212	$	55	$	227,468	$	(1,995)		$	(174,176)		$	51,352
Net loss	—	—			—	—		—		—			(22,830)			(22,830)
Foreign currency translation adjustment	—	—			—	—		—		1,462			—			1,462
Unrealized loss on investments	—	—			—	—		—		(249)			—			(249)
Stock based compensation expense	—	—			—	—		3,916		—			—			3,916
Issuance of common stock resulting from exercise of stock options	—	—			139	—		271		—			—			271
Issuance of common stock resulting from purchase of employee stock purchase plan shares	—	—			47	—		145		—			—			145

Issuance of common stock pursuant to at the market offering program, net of $0.4 million in offering costs	—	—			3,571	4		9,620		—			—			9,624
Preferred stock conversion (Series D)	3	—			(3,000)	(3)		3		—			—			0
Balance as of September 30, 2020	14	$	0		55,971	$	56	$	241,423	$	(782)		$	(197,006)		$	43,691

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

PIERIS PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)


	Nine Months Ended September 30,
	2020		2019 (1)
Operating activities:
Net loss	$	(22,830)	$	(24,698)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	1,623		367
Right-of-use asset amortization	(103)		315
Stock-based compensation	3,916		4,260

Other non-cash transactions	(293)		90
Changes in operating assets and liabilities	(14,792)		(18,827)
Net cash used in operating activities	(32,479)		(38,493)
Investing activities:
Purchases of property and equipment	(2,148)		(1,286)
Proceeds from maturity of investments	67,687		61,767
Purchases of investments	(41,178)		(48,762)
Net cash provided by investing activities	24,361		11,719
Financing activities:
Proceeds from exercise of stock options	271		218
Proceeds from exercise of warrants	0		105
Proceeds from employee stock purchase plan	145		178
Issuance of common stock, net of issuance costs	9,624		0

Net cash provided by financing activities	10,040		501
Effect of exchange rate change on cash and cash equivalents	2,708		(2,526)
Net decrease in cash and cash equivalents	4,630		(28,799)
Cash and cash equivalents at beginning of period	62,260		74,867
Cash and cash equivalents at end of period	$	66,890	$	46,068
Supplemental cash flow disclosures:

Net unrealized (loss)/gain on investments	$	(319)	$	469
Property and equipment included in accounts payable	$	370	$	198

Nine Months Ended September 30
2019 2018
Operating activities:

Net loss $ (24,698 ) $ (15,072 )
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation 367
405
Stock-based compensation 4,260
3,665
Deferred rent expense 853
—
Other 90
(376 )
Changes in operating assets and liabilities (19,365 ) 19,370
Net cash (used in) provided by operating activities (38,493 ) 7,992
Investing activities:
Purchases of property and equipment (1,286 ) (1,133 )
Proceeds from maturity of investments 61,767
64,490
Purchases of investments (48,762 ) (67,015 )
Net cash provided by (used in) investing activities 11,719
(3,658 )
Financing activities:
Proceeds from exercise of stock options 218
983
Proceeds from exercise of warrants 105
314
Proceeds from employee stock purchase plan 178
—
Issuance of common stock, net of issuance costs —
47,207
Net cash provided by financing activities 501
48,504
Effect of exchange rate change on cash and cash equivalents (2,526 ) (1,234 )
Net (decrease) increase in cash and cash equivalents (28,799 ) 51,604
Cash and cash equivalents at beginning of period 74,867
37,878
Cash and cash equivalents at end of period $ 46,068
$ 89,482
Supplemental cash flow disclosures:
Cash paid for income taxes $ —
$ 902
Net unrealized gain on investments $ 469
$ 1,096
Property and equipment included in accounts payable $ 198
$ 222
(1) Restated to conform to ASC 842. See accompanying Note 2.

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

PIERIS PHARMACEUTICALS, INC.

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. Corporate Information

Pieris Pharmaceuticals, Inc. was founded in May 2013, and acquired 100% interest in Pieris Pharmaceuticals GmbH (formerly Pieris AG, a German company ~~which~~that was founded in 2001) in December 2014. Pieris Pharmaceuticals, Inc. and its wholly-owned subsidiaries, hereinafter collectively Pieris, or the Company, is a clinical-stage biopharmaceutical company that discovers and develops ~~Anticalin®-based~~Anticalin-based drugs to target validated disease pathways in unique and transformative ways. ~~Pieris'~~Pieris’ corporate headquarters is located in Boston, Massachusetts and its research facility is located in ~~Freising-Weihenstephan,~~Hallbergmoos, Germany.

~~Pieris's~~Pieris’ clinical pipeline includes an inhaled IL-4Rα antagonist Anticalin protein to treat uncontrolled asthma and an immuno-oncology, or IO, bispecific targeting HER2 and ~~4-1BB, and a half-life-optimized hepcidin-antagonizing Anticalin protein to treat anemia.~~4-1BB.

The Company’s core Anticalin technology and platform was developed in Germany, and the Company has partnership arrangements with several major multi-national pharmaceutical companies.

As of September 30, ~~2019,~~2020, the Company had cash, cash equivalents and investments of ~~$86.2~~$82.6 million.The Company expects that its existing cash, cash equivalents and investments are sufficient to support operating expense and capital expenditure requirements for at least 12 months from the date of this filing.

2. Summary of Significant Accounting Policies

The Company´s significant accounting policies are described in Note 2 - Summary of Significant Accounting Policies, within the Company´s Annual Report on Form 10-K for the fiscal year ended December 31, ~~2018~~.2019. There has been no material change to the significant accounting policies during the nine months ended September 30, ~~2019~~2020, other than the ~~adoption~~Adoption of Financial Accounting Standards Board, or FASB, Accounting Standards ~~Codification,~~Update, or ~~ASC,~~ASU, No. 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606~~Revenue from Contracts with Customers~~, or ~~ASC 606,~~ASU 2018-18, described in more detail below.

Unaudited Interim Financial Information

The accompanying unaudited condensed consolidated financial statements included herein have been prepared by the Company in accordance with accounting principles generally accepted in the United States, or U.S. GAAP, for interim financial information and pursuant to the rules and regulations of the SEC. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, all adjustments, consisting of normal recurring adjustments, and disclosures considered necessary for a fair presentation of interim period results have been included. Interim results for the three and nine months ended September 30, ~~2019~~2020 are not necessarily indicative of results that may be expected for the year ending December 31, ~~2019.~~2020. For further information, refer to the financial statements and footnotes thereto included in the ~~Company´s~~Company’s Annual Report on Form 10-K for the fiscal year ended December 31, ~~2018,~~2019, which was filed with the SEC on March ~~18, 2019.~~13, 2020.

Basis of Presentation and Use of Estimates

The accompanying condensed consolidated financial statements of Pieris Pharmaceuticals, Inc. and its wholly-owned subsidiaries were prepared in accordance with U.S. GAAP. The condensed consolidated financial statements include the accounts of all subsidiaries. All intercompany balances and transactions have been eliminated.

The preparation of the financial statements in accordance with U.S. GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and the related disclosures at the date of the financial statements and during the reporting period. Significant estimates are used for, but are not limited to, revenue recognition; deferred tax assets, deferred tax liabilities and valuation allowances; determination of the incremental borrowing rate to calculate right-of-use assets and lease liabilities; beneficial conversion features; fair value of stock options, preferred stock, and warrants; and various accruals. Management evaluates its estimates on an ongoing basis. Actual results and outcomes could differ materially from management’s estimates, judgments and assumptions.

Cash, Cash Equivalents and Investments

The Company determines the appropriate classification of its investments at the time of purchase. All liquid investments with original maturities of 90 days or less from the purchase date and for which there is an active market are considered to be cash equivalents. The Company’s investments are comprised of money market, asset backed securities, government treasuries and corporate bonds that are classified as available-for-sale in accordance with FASB Accounting Standards Codification, or ASC, 320, Investments—Debt and Equity Securities. The Company classifies investments available to fund current operations as current assets on its balance sheets. Investments are classified as non-current assets on the balance sheets if (i) the Company has the intent and ability to hold the investments for a period of at least one year and (ii) the contractual maturity date of the investments is greater than one year.

Available-for-sale investments are recorded at fair value, with unrealized gains or losses included in accumulated other comprehensive loss on the Company’s balance sheets. Realized gains and losses are determined using the specific identification method and are included as a component of other income. Realized gains of $0.1 million and $0.2 million were recognized for the three and nine months ended September 30, 2019. Realized gains of approximately $0.8 million and realized losses $0.7 million were recognized for the three and nine months ended September 30, 2018.

The Company reviews investments for other-than-temporary impairment whenever the fair value of an investment is less than the amortized cost and evidence indicates that an investment’s carrying amount is not recoverable within a reasonable period of time. To determine whether an impairment is other-than temporary, the Company considers its intent to sell or whether it is more likely than not that the Company will be required to sell the investment before recovery of the investment’s amortized cost basis. Evidence considered in this assessment includes reasons for the impairment, the severity and the duration of the impairment and changes in value subsequent to period end. As of September 30, 2019, there were no investments with a fair value that was significantly lower than the amortized cost basis or any investments that had been in an unrealized loss position for a significant period.

Concentration of Credit Risk and Off-Balance Sheet Risk

The Company has no financial instruments with ~~off‑balance~~off-balance sheet risk such as foreign exchange contracts, option contracts or other foreign hedging arrangements. Financial instruments that subject Pieris to concentrations of credit risk include cash and cash equivalents, investments, and accounts receivable. The Company’s cash, cash equivalents, and investments are held in accounts with financial institutions that management believes are creditworthy. The Company’s investment policy includes guidelines on the quality of the institutions and financial instruments and defines allowable investments that the Company believes minimizes the exposure to concentration of credit risk. ~~These amounts, at times, may exceed federally insured limits.~~ The Company has not experienced any credit losses in such accounts and does not believe it is exposed to any significant credit risk on these funds. Accounts receivable primarily consist of amounts due under strategic partnership and other license agreements with major multi-national pharmaceutical companies for which the Company does not obtain collateral.

Fair Value Measurement

The Company is required to disclose information on all assets and liabilities reported at fair value that enables an assessment of the inputs used in determining the reported fair values. FASB ASC Topic 820, Fair Value Measurement and Disclosures, ~~or ASC 820,~~ established a hierarchy of inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the financial instrument based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the financial instrument and are developed based on the best information available in the circumstances. The fair value hierarchy applies only to the valuation inputs used in determining the reported or disclosed fair value of the financial instruments and is not a measure of the investment credit quality. Fair value measurements are classified and disclosed in one of the following three categories:

•Level 1 inputs are quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

•Level 2 utilizes quoted market prices in markets that are not active, broker or dealer quotations or alternative pricing sources with reasonable levels of price transparency.

•Level 3 inputs are unobservable inputs for the asset or liability in which there is little, if any, market activity for the asset or liability at the measurement date.

To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in

determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

Financial instruments measured at fair value on a recurring basis include cash equivalents and investments (Note 4).

An entity may elect to measure many financial instruments and certain other items at fair value at specified election dates. Subsequent unrealized gains and losses on items for which the fair value option has been elected will be reported in net loss. The Company did not elect to measure any additional financial instruments or other items at fair value.

Property and Equipment

Property and equipment are recorded at acquisition cost, less accumulated depreciation and impairment. Depreciation on property and equipment is calculated using the straight-line method over the remaining estimated useful lives of the assets. Maintenance and repairs to these assets are charged to expenses as occurred. For the nine months ended September 30, 2020, the Company added material assets related to the February 2020 move to a new research and development facility in Hallbergmoos, Germany. Because of this, the Company expanded its presentation of property and equipment to be more descriptive and updated the useful life for one asset category on a prospective basis only. The disclosures for property and equipment, net as of December 31, 2019 have been reclassified to confirm with the current period presentation. The estimated useful life of the different groups of property and equipment is as follows:


Asset Classification						Estimated useful life (in years)
Leasehold improvements						shorter of useful life or remaining life of the lease
Laboratory furniture and equipment						8-14
Office furniture and equipment						5-13
Computer and equipment						3-7

Revenue Recognition

~~Pieris~~The Company has entered into several licensing agreements with collaboration partners for the development of Anticalin therapeutics against a variety of targets. The terms of these agreements provide for the transfer of multiple goods or services which may include: (i) licenses, or options to obtain licenses, to ~~Pieris’s~~the Company’s Anticalin technology and/or specific programs and (ii) research and development activities to be performed on behalf of or with a collaborative partner. Payments to Pieris under these agreements may include upfront fees (which include license and option fees), payments for research and development activities, payments based upon the achievement of certain milestones and royalties on product sales. There are no performance, cancellation, termination or refund provisions in any of the arrangements that could result in material financial consequences to Pieris.

Effective January 1, 2019, the Company adopted ASC 606. The standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The standard allows for two transition methods -- full retrospective, in which the standard is applied to each prior reporting period presented, or modified retrospective, in which the cumulative effect of initially applying the standard is recognized at the date of initial adoption. The Company elected the modified retrospective approach and applied it to contracts not completed at the date of adoption. Therefore, comparative prior periods have not been adjusted. The reported results for 2019 reflect the application of ASC 606 guidance while the reported results for 2018 were prepared under the guidance of FASB ASC Topic 605, ~~Revenue Recognition,~~ or ASC 605. Furthermore, the Company adopted the contract modification practical expedient set forth in ASC 606 and will reflect the aggregate effect of all modifications that occurred before January 1, 2019 when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price to the satisfied and unsatisfied performance obligations. See Note 3 for additional details on these arrangements.

Collaborative Arrangements

The Company considers the nature and contractual terms of an arrangement and assess whether the arrangement involves a joint operating activity pursuant to which it is an active participant and exposed to significant risks and rewards with respect to the arrangement. If the Company is an active participant and exposed to the significant risks and rewards with respect to the arrangement, it accounts for these arrangements pursuant to ASC 808, Collaborative Arrangements, or ASC 808, and applies a systematic and rational approach to recognize revenue. The Company classifies payments received as revenue and payments made as a reduction of revenue in the period in which they are earned.

In November 2018, the FASB issued ASU 2018-18, which makes targeted improvements to generally accepted accounting principles for collaborative arrangements, including: clarification that certain transactions between collaborative arrangement participants should be accounted for as revenue under ASC 606, Revenue from Contracts with Customers, or ASC 606, when the collaborative arrangement participant is a customer in the context of a unit of account, adding unit-of-account guidance in ASC 808 to align with the guidance in ASC 606, and a requirement that in a transaction with a collaborative arrangement participant that is not directly related to sales to third parties, presenting the transaction together with revenue recognized under ASC 606 is precluded if the collaborative arrangement participant is not a customer. The guidance per ASU 2018-18 was adopted retrospectively to the date of initial application of ASC 606. The Company adopted ASU 2018-18 in the first quarter of 2020. The adoption of this standard did not have a material impact on the Company’s condensed consolidated financial statements; however, revenue recognized under a collaborative arrangement involving a participant that is not a customer (Collaboration Revenue) is now presented separately from Customer Revenue. This change has been reflected in the condensed consolidated statement of operations and the 2019 amounts were adjusted to conform to ASC 808 as follows:


	Three Months Ended September 30, 2019						Nine Months Ended September 30, 2019
	As reported pre-adoption		ASC 808 Adoption Adjustment		As reported post-adoption		As reported pre-adoption		ASC 808 Adoption Adjustment		As reported post-adoption
Customer revenue	$	14,498	$	(10,909)	$	3,589	$	26,966	$	(11,428)	$	15,538
Collaboration revenue	634		10,909		11,543		2,043		11,428		13,471
Total Revenue	$	15,132	$	0	$	15,132	$	29,009	$	0	$	29,009

Revenue from Contracts with Customers

In accordance with ASC 606, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Company expects to be entitled in exchange for these goods and services. To achieve this core principle, the Company applies the following five steps: 1) identify the customer contract; 2) identify the contract’s performance obligations; 3) determine the transaction price; 4) allocate the transaction price to the performance obligations; and 5) recognize revenue when or as a performance obligation is satisfied.

The Company evaluates all promised goods and services within a customer contract and determines which of such goods and services are separate performance obligations. This evaluation includes an assessment of whether the good or service is capable of being distinct and whether the good or service is separable from other promises in the contract. In assessing whether promised goods or services are distinct, the Company considers factors such as the stage of development of the underlying intellectual property and the capabilities of the customer to develop the intellectual property on their own or whether the required expertise is readily available.

Licensing arrangements are analyzed to determine whether the promised goods or services, which often include licenses, research and development services and governance committee services, are distinct or whether they must be accounted for as part of a combined performance obligation. If the license is considered not to be distinct, the license would then be combined with other

promised goods or services as a combined performance obligation. If the Company is involved in a governance committee, it assesses whether its involvement constitutes a separate performance obligation. When governance committee services are determined to be separate performance obligations, the Company determines the fair value to be allocated to this promised service.

Certain contracts contain optional and additional items, which are considered marketing offers and are accounted for as separate contracts with the customer if such option is elected by the customer, unless the option provides a material right which would not be provided without entering into the contract. An option that is considered a material right is accounted for as a separate performance obligation.

The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring goods and services to the customer. A contract may contain variable consideration, including potential payments for both milestone and research and development services. For certain potential milestone payments, the Company estimates the amount of variable consideration by using the most likely amount method. In making this assessment, the Company evaluates factors such as the clinical, regulatory, commercial and other risks that must be overcome to achieve the milestone. Each reporting period the Company re-evaluates the probability of achievement of such variable consideration and any related constraints. Pieris will include variable consideration, without constraint, in the transaction price to the extent it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. For potential research and development service payments, the Company estimates the amount of variable consideration by using the expected value method, including any approved budget updates arising from additional research or development services.

If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price among the performance obligations on a relative standalone selling price basis unless the transaction price is variable and meets the criteria to be allocated entirely to a performance obligation or to a distinct good or service that forms part of a single performance obligation.

The Company allocates the transaction price based on the estimated standalone selling price of the underlying performance obligations or in the case of certain variable consideration to one or more performance obligations. The Company must develop assumptions that require judgment to determine the stand-alone selling price for each performance obligation identified in the

contract. The Company utilizes key assumptions to determine the stand-alone selling price, which may include other comparable transactions, pricing considered in negotiating the transaction and the estimated costs to complete the respective performance obligation. Certain variable consideration is allocated specifically to one or more performance obligations in a contract when the terms of the variable consideration relate to the satisfaction of the performance obligation and the resulting amounts allocated to each performance obligation are consistent with the amount the Company would expect to receive for each performance obligation.

When a performance obligation is satisfied, revenue is recognized for the amount of the transaction price, excluding estimates of variable consideration that are constrained, that is allocated to that performance obligation on a relative standalone selling price basis. Significant management judgment is required in determining the level of effort required under an arrangement and the period over which the Company is expected to complete its performance obligations under an arrangement.

For performance obligations consisting of licenses and other promises, the Company utilizes judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue from non- refundable, up-front fees. The Company evaluates the measure of progress each reporting period and, if necessary, adjusts the measure of performance and related revenue recognition. If the license to the Company’s intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, the Company will recognize revenue from non-refundable, up-front fees allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the license.

Milestones and Royalties

The Company aggregates milestones into four categories: (i) research milestones, (ii) development milestones, (iii) commercial milestones, and (iv) sales milestones. Research milestones are typically achieved upon reaching certain success criteria as defined in each agreement related to developing an Anticalin protein against the specified target. Development milestones are typically reached when a compound reaches a defined phase of clinical research or passes such phase or upon gaining regulatory approvals. Commercial milestones are typically achieved when an approved pharmaceutical product reaches the status for commercial sale, including regulatory approval. Sales milestones are certain defined levels of net sales by the licensee, such as when a product first achieves global sales or annual sales of a specified amount.

There is uncertainty that the events to obtain the research and development milestones will be achieved given the nature of clinical development and the stage of the Company’s technology. The Company has thus determined that all research and development milestones will be constrained until it is deemed probable that a significant revenue reversal will not occur. For revenues from research and development milestones, payments will be recognized consistent with the recognition pattern of the performance obligation to which they relate.

For arrangements that include sales-based royalties, including milestone payments based on the level of sales, and for which the license is deemed to be the predominant item to which the royalties relate, the Company recognizes revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). Commercial milestones and sales royalties are determined by sales or usage-based thresholds and will be accounted for under the royalty recognition constraint as constrained variable consideration.

Contract Balances

The Company recognizes a contract asset when the Company transfers goods or services to a customer before the customer pays consideration or before payment is due, excluding any amounts presented as a receivable (i.e., accounts receivable). A contract asset is an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer. The contract liabilities (i.e., deferred revenue) primarily relate to contracts where the Company has received payment but has not yet satisfied the related performance obligations.

In the event of an early termination of a collaboration agreement, any contract liabilities would be recognized in the period in which all Company obligations under the agreement have been fulfilled.

Costs to Obtain and Fulfill a Contract with a Customer

Certain costs to obtain customer contracts, including success-based fees paid to third-party service providers, and costs to fulfill customer contracts are capitalized in accordance with FASB ASC 340, Other Assets and Deferred Costs, or ASC 340. These costs are amortized to expense on a systemic basis that is consistent with the transfer to the customer of the goods or services to

which the asset relates. The Company will expense the amortization of costs to obtain customer contracts to general and administrative expense and costs to fulfill customer contracts to research and development expense.

Leases

~~Impact~~Effective on December 31, 2019, the Company lost its emerging growth company, or EGC, status which accelerated the requirement of ~~Adopting~~the adoption of FASB issued ASU No. 2016-02, ASC ~~606 on the Financial Statements~~

842, Leases (Topic 842), or ASC 842. As a result, ~~of applying~~ the ~~modified retrospective method~~Company adjusted its previously reported consolidated financial statements effective January 1, 2019 in the Company's 2019 Form 10-K, and amendments to ~~adopt~~previously filed Forms 10-Q were not required. Accordingly, the Company's prior period condensed consolidated financial statements and information, as presented herein, have been restated to conform to the new ~~revenue guidance, the following adjustments were made to the consolidated balance sheet as of January 1, 2019:~~standard.

As Reported, December 31, 2018 ASC 606 Adjustment Adjusted, January 1, 2019
Consolidated Balance Sheet Data (in thousands):
Prepaid expenses and other current assets $ 4,574
$ 716
$ 5,290
Other non-current assets 910
1,120
2,030
Total Assets $ 141,341
$ 1,836
$ 143,177
Deferred revenue, net of current portion $ 53,303
$ 3,477
$ 56,780
Total Liabilities 101,406
3,477
104,883
Accumulated deficit (147,066 ) (1,641 ) (148,707 )
Total stockholders' equity 39,935
(1,641 ) 38,294
Total liabilities and stockholders' equity $ 141,341
$ 1,836
$ 143,177

~~These changes were primarily caused by the differences in determining and allocating transaction price under ASC 606 and costs to obtain certain contracts.~~

The adoption of ASC 606 did not impact income taxes, as the Company fully reserves its net deferred tax assets. Therefore, the change to the Company's net deferred tax asset position due to adoption was offset by a corresponding change to the valuation allowance.

The following ~~table compares~~tables summarize the ~~reported~~effects of adopting ASC 842 on our condensed consolidated ~~balance sheet and statement of operations, as of September 30, 2019 and for the three and nine months ended September 30, 2019, to the pro-forma amounts had the previous guidance been in effect:~~financial statements (in thousands):


	Nine Months Ended September 30, 2019
	Previously reported		ASC 842 Adjustment during the period		As adjusted
Operating activities:
Net loss	$	(24,698)	$	0	$	(24,698)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	367		0		367
Right-of-use asset amortization	0		315		315
Stock-based compensation	4,260		0		4,260
Deferred rent expense	853		(853)		0
Other non-cash transactions	90		0		90
Changes in operating assets and liabilities	(19,365)		538		(18,827)
Net cash used in operating activities	$	(38,493)	$	0	$	(38,493)

September 30, 2019
As Reported, ASC 606 Adjustments Adjusted Balance, ASC 605
Condensed Consolidated Balance Sheet Data (in thousands):
Prepaids and other current assets $ 4,778
$ (646 ) $ 4,132
Other non-current assets 7,770
(808 ) 6,962
Total Assets $ 116,751
$ (1,454 ) $ 115,297
Deferred revenues, current portion 27,242
9,774
37,016
Deferred revenue, net of current portion 44,179
(10,384 ) 33,795
Total Liabilities 96,109
(610 ) 95,499
Accumulated Deficit (173,405 ) (844 ) (174,249 )
Total stockholders' equity 20,642
(844 ) 19,798
Total liabilities and stockholders' equity $ 116,751
$ (1,454 ) $ 115,297

Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019
As Reported, ASC 606 Adjustments Adjusted Balance, ASC 605 As Reported, ASC 606 Adjustments Adjusted Balance, ASC 605
Condensed Consolidated Statement of Operations Data (in thousands):
Revenue $ 15,132
$ (2,195 ) $ 12,937
$ 29,009
$ (2,717 ) $ 26,292
General and administrative expenses 4,835
(191 ) 4,644
13,956
(303 ) 13,653
Loss from operations (2,914 ) (2,386 ) (5,300 ) (25,827 ) (3,020 ) (28,847 )
Loss before income taxes (2,592 ) (2,386 ) (4,978 ) (24,698 ) (3,020 ) (27,718 )
Net loss $ (2,592 ) $ (2,386 ) $ (4,978 ) $ (24,698 ) $ (3,020 ) $ (27,718 )
Comprehensive loss $ (582 ) $ (2,386 ) $ (2,968 ) $ (22,413 ) $ (3,020 ) $ (25,433 )

The application of ASC 606 did not have an impact on the Company’s net cash used in operating activities for the nine months ended September 30, 2019 but did result in offsetting adjustments to net loss, change in other current and non-current assets, and the change in deferred revenue presented within the condensed consolidated statements of cash flows for that period.

~~Operating Leases~~

The Company ~~leases its office~~determines if an arrangement is a lease at inception. The Company’s contracts are determined to contain a lease within the scope of ASC 842 when all of the following criteria based on the specific circumstances of the arrangement are met: (1) there is an identified asset for which there are no substantive substitution rights; (2) the Company has the right to obtain substantially all of the economic benefits from the identified asset; and ~~laboratory facilities~~(3) the Company has the right to direct the use of the identified asset.

At the commencement date, operating lease liabilities and ~~certain~~their corresponding right-of-use assets are recorded based on the present value of future lease payments over the expected lease term. The Company’s lease agreements ~~contain free~~do not provide an implicit rate. As a result, the Company utilizes an estimated incremental borrowing rate to discount lease payments, which is based on the rate of interest the Company would have to pay to borrow a similar amount on a collateralized basis over a similar term and based on observable market data points. Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or ~~escalating rent payment provisions. The Company recognizes rent expense under such leases~~lease incentives received. Operating lease cost is recognized over the expected term on a straight-line ~~basis over~~basis.

The Company typically only includes an initial lease term in its assessment of a lease agreement. Options to renew a lease are not included in the Company’s assessment unless there is reasonable certainty that the Company will renew. The expected lease term ofincludes noncancelable lease periods and, when applicable, periods covered by an option to extend the lease if the Company is reasonably certain to exercise that option, as well as periods covered by an option to terminate the lease if the Company is reasonably certain not to exercise that option.

Assumptions made by the Company at the commencement date are re-evaluated upon occurrence of certain events, including a lease modification. A lease modification results in a separate contract when the modification grants the lessee an additional right of use not included in the original lease and when lease payments increase commensurate with the ~~difference between~~standalone price for the ~~expense and the payments recorded as deferred rent on the consolidated balance sheets. Lease renewal periods are considered on~~additional right of use. When a ~~lease-by-lease basis~~lease modification results in ~~determining the lease term. Funding of leasehold improvements by the Company’s landlord are~~a separate contract, it is accounted for in the same manner as a ~~tenant improvement allowance and are amortized as a reduction of rent expense over the term of the~~new lease. ~~Leasehold improvements are amortized on a straight-line basis over the shorter of the useful life or the remaining lease term.~~

Recent Accounting Pronouncements Not Yet Adopted

In ~~February~~June 2016, the FASB issued ~~Accounting Standards Update,~~ ASU No. 2016-13, Financial Instruments - Credit Losses(Topic 326): Measurement of Credit Losses on Financial Statements, or ASU 2016-13. ASU 2016-13 significantly changes the impairment model for most financial assets and certain other instruments. The new standard requires that expected credit losses relating to financial assets measured on an amortized cost basis and available-for-sale debt securities be recorded through an allowance for credit losses. It also limits the amount of credit losses to be recognized for available-for-sale debt securities to the amount by which carrying value exceeds fair value, and requires the reversal of previously recognized credit losses if fair value increases. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset.

Subsequently, in November 2018, the FASB issued ASU No. ~~2016-2,~~ ~~Leases (Topic 842)~~2018-19, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, which clarifies codification and corrects unintended application of the guidance. In November 2019, the FASB issued ASU No. 2019-11, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, which clarifies or addresses specific issues about certain aspects of ASU ~~2016-2. Subsequently,~~2016-13. In November 2019 the FASB also issued ASU ~~2019-01,~~ No. 2019-10, Financial Instruments-Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842), or~~ASU 2019-01:~~ ~~Codification Improvements~~: Effective Dates, which

~~updated codification language under~~ delays the ~~standard. Under~~effective date of ASU 2016-13 by three years for certain smaller reporting companies such as the ~~amendments~~Company. The guidance in ASU 2016-2, lessees will be required to recognize (i) a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis and (ii) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term for all leases (with the exception of short-term leases) at the commencement date. This guidance2016-13 is effective for ~~public emerging growth companies, like~~ the Company for financial statements issued for fiscal years beginning after December 15, ~~2019 including~~2022 and interim periods within those fiscal ~~years. Early~~years, with early adoption is permitted. The Company anticipates an effective date of adoption for this standard in the fourth quarter of 2019, retroactive to January 1, 2019, when the Company anticipates losing emerging growth company status. The Company has begun to assess the current state of accounting for leases, to catalog all current leases effected and to review all vendor contracts for the potential existence of a lease in order to understand the gaps between the current state and required future state and to implement the new processes and controls required. The Company currently expects that adoption of this standard will have a material increase on both total assets and liabilities in its condensed consolidated financial statements based upon the Company's current leasing obligations.

~~In November 2018, the FASB issued ASU No. 2018-18,~~ ~~Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606,~~ orASU 2018-18. ASU 2018-18 makes targeted improvements to generally accepted accounting principles for collaborative arrangements, including: (i) clarification that certain transactions between collaborative arrangement participants should be accounted for as revenue under ASC 606 when the collaborative arrangement participant is a customer in the context of a unit of account, (ii) adding unit-of-account guidance in Topic 808 to align with the guidance in ASC 606, and (iii) a requirement that in a transaction with a collaborative arrangement participant that is not directly related to sales to third parties, presenting the transaction together with revenue recognized under ASC 606 is precluded if the collaborative arrangement participant is not a customer. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. The Company is currentlystill evaluating the impact of the adoption ~~if any, that~~of this ~~standard may have on its condensed consolidated financial statements.~~standard.

The Company has considered other recent accounting pronouncements and concluded that they are either not applicable to the business or that the effect is not expected to be material to the unaudited condensed consolidated financial statements as a result of future adoption.

3. Revenue

General

The Company has not generated revenue from product sales. The Company has generated revenue from contracts with customers ~~(option, license~~ and revenue from collaboration ~~agreements),~~agreements, which include upfront payments for licenses or options to obtain licenses, payments for research and development services and milestone payments.

~~During the three and nine months ended September 30, 2019 and 2018, respectively, the Company recognized revenues as follows (in thousands):~~

Three Months Ended September 30 Nine Months Ended September 30
2019 2018 2019 2018
Revenue from contracts with customers $ 14,498
$ 7,873
$ 26,966
$ 22,541
Collaboration revenue (ASC 808) 634
472
2,043
1,555
Other revenues —
—
—
91
Total Revenue $ 15,132
$ 8,345
$ 29,009
$ 24,187

Included in the revenue from contracts with customers for the three and nine months ended September 30, 2019 was $11.0 million and $17.4 million, respectively, that was included in the aggregated deferred liability balances at December 31, 2018.

~~During the three and nine months ended September 30, 2019 and 2018, respectively, the~~The Company recognized revenue from the following strategic partnerships and other license agreements (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Seagen	$	366	$	576	$	9,326	$	2,005
AstraZeneca	2,182		2,903		7,227		12,811
Servier	391		11,653		10,893		14,193
Total Revenue	$	2,939	$	15,132	$	27,446	$	29,009

Three Months Ended September 30 Nine Months Ended September 30
2019 2018 2019 2018
Seattle Genetics $ 576
$ 1,788
$ 2,005
$ 4,519
AstraZeneca 2,903
5,905
12,811
14,841
Servier 11,653
652
14,193
3,279
Other —
—
—
1,548
Total Revenue $ 15,132
$ 8,345
$ 29,009
$ 24,187

Under the Company´s existing strategic partnerships and other license agreements, the Company could receive the following potential milestone payments (in millions):


	Research, Development, Regulatory & Commercial Milestones		Sales Milestones
AstraZeneca	$	1,111	$	960
Servier	712		632
Seagen	764		450
Total potential milestone payments	$	2,587	$	2,042

Research, Development & Commercial Milestones Sales Milestones
Seattle Genetics $ 769
$ 450
AstraZeneca 1,111
960
Servier 778
688
Total potential milestone payments $ 2,658
$ 2,098
Strategic Partnerships

~~Seattle Genetics~~Seagen

On February 8, 2018, the Company entered into a license and collaboration agreement, or the ~~Seattle Genetics~~Seagen Collaboration Agreement, and a non-exclusive Anticalin platform technology license agreement, or the ~~Seattle Genetics~~Seagen Platform License, and together with the ~~Seattle Genetics~~Seagen Collaboration Agreement, the ~~Seattle Genetics~~Seagen Agreements, with Seagen Inc. (formerly Seattle Genetics, Inc.), or ~~Seattle Genetics,~~Seagen, pursuant to which the parties will develop multiple targeted bispecific IO treatments for solid tumors and blood cancers.

Under the terms of the ~~Seattle Genetics~~Seagen Agreements, the companies will pursue multiple antibody-Anticalin fusion proteins during the research phase. The ~~Seattle Genetics~~Seagen Agreements provide ~~Seattle Genetics~~Seagen a base option to select up to ~~three~~3 programs for further development. Prior to the initiation of a pivotal trial, the Company may opt into global co-development and U.S. commercialization of the second program and share in global costs and profits on an equal basis. ~~Seattle Genetics~~Seagen will solely develop, fund and commercialize the other ~~two~~2 programs. ~~Seattle Genetics~~Seagen may also decide to select additional candidates from the initial research phase for further development in return for the payment to usthe Company of additional fees, milestone payments and royalties.

The ~~Seattle Genetics~~Seagen Platform License grants ~~Seattle Genetics~~Seagen a non-exclusive license to certain intellectual property related to the Anticalin platform technology.

Upon signing the ~~Seattle Genetics~~Seagen Agreements, ~~Seattle Genetics~~Seagen paid the Company a $30.0 million upfront fee and an additional $4.9 million was estimated to be paid for research and development services as reimbursement to the Company through the end of the research term. In addition, the Company may receive tiered royalties on net sales up to the low double-digits and up to $1.2 billion in total success-based research, development, commercial and sales milestones payments across the product candidates, depending on the successful development and commercialization of those candidates. If ~~Seattle Genetics~~Seagen exercises its option to select additional candidates from the initial research phase for further development, payment to Pieris of additional fees, milestone payments and royalties would result.

The term of each of the ~~Seattle Genetics~~Seagen Agreements ends upon the expiration of all of ~~Seattle Genetics’~~Seagen’s payment obligations under each such agreement. The ~~Seattle Genetics~~Seagen Collaboration Agreement may be terminated by ~~Seattle Genetics~~Seagen on a product-by-product basis for convenience beginning 12 months after its effective date upon 90 days' notice or, for any program where a pivotal study has been initiated, upon 180 days' notice. Any program may be terminated at ~~Seattle Genetics'~~Seagen's option. If any program is terminated by ~~Seattle Genetics~~Seagen after a pre-defined pre-clinical stage, the Company will have full rights to continue such program. If any program is terminated by ~~Seattle Genetics~~Seagen prior to such pre-defined pre-clinical stage, the Company will have the right to continue to develop such program, but will be obligated to offer a co-development option to ~~Seattle Genetics~~Seagen for such program. The ~~Seattle Genetics~~Seagen Collaboration Agreement may also be terminated by ~~Seattle Genetics~~Seagen or the Company for an uncured material breach by the other party upon 90 days' notice, subject to extension for an additional 90 days if the material breach relates to diligence obligations and subject, in all cases, to dispute resolution procedures. The ~~Seattle Genetics~~Seagen Collaboration Agreement may also be terminated due to the other party’s insolvency and may in certain instances, including for reasons of safety, be terminated

on a product-by-product basis. Each party may also terminate the ~~Seattle Genetics~~Seagen Agreements if the other party challenges the validity of any patents licensed under the ~~Seattle Genetics~~Seagen Agreements, subject to certain exceptions. The ~~Seattle Genetics~~Seagen Platform License will terminate upon termination of the ~~Seattle Genetics~~Seagen Collaboration Agreement, whether in its entirety or on a product-by-product basis.

The Company determined that the ~~Seattle Genetics~~Seagen Agreements should be combined and evaluated as a single arrangement under ASC 606 as they were executed on the same date. The arrangement with ~~Seattle Genetics~~Seagen provides for the transfer of the following goods or services: (i) ~~three~~3 candidate research licenses that each consist of a non-exclusive platform technology license, a co-exclusive candidate research license, and research and development services, (ii) research, development and manufacturing services associated with each candidate research license, (iii) participation on various governance committees, and (iv) ~~two~~2 antibody target swap options which were assessed as material rights.

Management evaluated all of the promised goods or services within the contract and determined which such goods and services were separate performance obligations. The Company determined that the licenses granted, at arrangement inception, should be combined with the research and development services to be provided for the related antibody target programs as they are not capable of being distinct. A third party would not be able to provide the research and development services due to the specific nature of the intellectual property and knowledge required to perform the services, and ~~Seattle Genetics~~Seagen could not benefit from the licenses without the corresponding services. The Company determined that the participation on the various governance committees was distinct as the services could be performed by an outside party.

As a result, management concluded there ~~are six~~were 6 separate performance obligations at the inception of the ~~Seattle Genetics~~Seagen Agreements: (i) ~~three~~3 combined performance obligations, each comprised of a non-exclusive platform technology license, a co-exclusive

candidate research license, and research and development services for the first three approved ~~Seattle Genetics~~Seagen antibody target programs, (ii) ~~two~~2 performance obligations each comprised of a material right for an antibody target swap option for the first and the second approved ~~Seattle Genetics~~Seagen antibody target for no additional consideration, and (iii) ~~one~~1 performance obligation comprised of the participation on the various governance committees.

The Company allocated consideration to the performance obligations based on the relative proportion of their standalone selling prices. The Company developed standalone selling prices for licenses by applying a risk adjusted, net present value, estimate of future potential cash flows approach, which included the cost of obtaining research and development services at arm’s length from a third-party provider, as well as internal full-time equivalent costs to support these services. The Company developed the standalone selling price for committee participation by using management’s estimate of the anticipated participation hours multiplied by a market rate for comparable participants.

The transaction price at inception is comprised of fixed consideration of $30.0 million in upfront fees and variable consideration of $4.9 million of estimated research and development services to be reimbursed as research and development occurs through the research term. The $30.0 million upfront fee, which represents the fixed consideration in the transaction price, was allocated to each of the performance obligations based on the relative proportion of their standalone selling prices. The $4.9 million in variable consideration related to the research and development services is allocated specifically to the ~~three~~3 target program performance obligations based upon the budgeted services for each program.

The amounts allocated to the performance obligations for the ~~three~~3 research programs will be recognized on a proportional performance basis through the completion of each respective estimated research term of the individual research programs. The amounts allocated to the material right for the antibody target swap option will be recognized either at the time the material right expires or, if exercised, on a proportional performance basis over the estimated research term for that program. The amounts allocated to the participation on each of the committees will be recognized straight-line over the anticipated research term for all research programs. As of September 30, ~~2019,~~2020, there was ~~$24.7~~$20.2 million of aggregate transaction price allocated to remaining performance obligations.

In June 2020, Seagen and the Company entered into amendments to the Seagen Agreements, or together, the Amendment. The Amendment extended the deadline for Seagen to nominate a second and third antibody target. As a result of the Amendment, which completed the obligations under the research term for the first antibody target, the Company recorded $4.2 million of previously deferred revenue for the three and nine months ended September 30, 2020. The Company also recorded $5.0 million of milestone revenue due from Seagen during the quarter ended June 30, 2020, as it was no longer deemed probable that a significant reversal of revenue would occur, and the remaining performance obligations on first antibody target were completed.

Under the ~~Seattle Genetics~~Seagen Agreements, the Company is eligible to receive other various research, development, commercial and sales milestones. There is uncertainty that the events to obtain the research and development milestones will be achieved given the nature of clinical development and the stage of the Company’s technology. ~~The~~With the exception of the previously discussed achieved milestone, the Company has ~~thus~~ determined that all other research and development milestones will be constrained until it is deemed probable that a significant revenue reversal will not occur.

As of September 30, ~~2019,~~2020, there ~~is $7.3~~were $3.4 million and ~~$13.2~~$13.5 million of current and non-current deferred revenue, respectively, related to the ~~Seattle Genetics~~Seagen Agreements.

AstraZeneca

On May 2, 2017, the Company entered into a license and collaboration agreement, or the AstraZeneca Collaboration Agreement, and a non-exclusive Anticalin platform technology license agreement, or AstraZeneca Platform License, and together with the AstraZeneca Collaboration Agreement, the AstraZeneca Agreements, with AstraZeneca AB, or AstraZeneca, which became effective on June 10, 2017, following expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. Under the AstraZeneca Agreements, the parties will advance several novel inhaled Anticalin proteins.

In addition to the Company’s lead inhaled drug candidate, ~~PRS-060,~~PRS-060/AZD1402, or the AstraZeneca Lead Product, the Company and AstraZeneca will also collaborate to progress ~~four~~4 additional novel Anticalin proteins against undisclosed targets for respiratory diseases, or the AstraZeneca Collaboration Products, and together with the AstraZeneca Lead Product, the AstraZeneca Products. The Company is responsible for advancing the AstraZeneca Lead Product through its phase 1 study, with the associated costs funded by AstraZeneca. The parties will collaborate thereafter to conduct a phase 2a study in asthma patients, with AstraZeneca continuing to fund development costs. After completion of ~~the~~a phase 2a study, Pieris has the option to co-develop the AstraZeneca Lead Product and also has ~~the~~a separate option to co-commercialize the AstraZeneca Lead Product in

the United States. For the AstraZeneca Collaboration Products, the Company will be responsible for the initial discovery of the novel Anticalin proteins, after which AstraZeneca will take the lead on continued development of the AstraZeneca Collaboration Products. The Company has the option to co-develop ~~two~~2 of the ~~four~~4 AstraZeneca Collaboration Products beginning at a pre-defined preclinical stage and would also have the option to co-commercialize these ~~two~~2 programs in the United States, while AstraZeneca will be responsible for development and commercialization of the other programs worldwide.

The term of each of the AstraZeneca Agreements ends upon the expiration of all of AstraZeneca’s payment obligations under such agreement. The AstraZeneca Collaboration Agreement may be terminated by AstraZeneca in its entirety for convenience beginning 12 months after its effective date upon 90 days’ notice or, if the Company has obtained marketing approval for the marketing and sale of a product, upon 180 days’ notice. Each program may be terminated at AstraZeneca’s option; if any program is terminated by AstraZeneca, the Company will have full rights to such program. The AstraZeneca Collaboration Agreement may also be terminated by AstraZeneca or the Company for material breach upon 180 days’ notice of a material breach (or 30 days with respect to payment breach), provided that the applicable party has not cured such breach by the permitted cure period (including an additional 180 days if the breach is not susceptible to cure during the initial 180-day period) and dispute resolution procedures specified in the agreement have been followed. The AstraZeneca Collaboration Agreement may also be terminated due to the other party’s insolvency and may in certain instances be terminated on a product-by-product and/or country-by-country basis. Each party may also terminate an AstraZeneca Agreement if the other party challenges the validity of patents related to certain intellectual property licensed under such AstraZeneca Agreement, subject to certain exceptions for infringement suits, acquisitions and newly-acquired licenses. The AstraZeneca Platform License will terminate upon termination of the AstraZeneca Collaboration Agreement, on a product-by-product and/or country-by-country basis.

At inception, AstraZeneca is granted the following licenses: (i) research and development license for the AstraZeneca Lead Product, (ii) commercial license for the AstraZeneca Lead Product, (iii) individual research licenses for each of the ~~four~~4 AstraZeneca Collaboration Products, (iv) individual commercial licenses for each of the ~~four~~4 AstraZeneca Collaboration Products, and (v) individual non-exclusive platform technology licenses for the AstraZeneca Lead Product and the ~~four~~4 AstraZeneca Collaboration Products. AstraZeneca will be granted individual development licenses for each of the ~~four~~4 AstraZeneca Collaboration Products upon completion of the initial discovery of Anticalin proteins.

The collaboration will be managed on an overall basis by a Joint Steering Committee, or JSC, formed by an equal number of representatives from the Company and AstraZeneca. In addition to the JSC, the AstraZeneca Collaboration Agreement also requires each party to designate an alliance manager to facilitate communication and coordination of the parties' activities under the agreement, and further requires participation of both parties on a joint development committee, or JDC, and a commercialization committee. The responsibilities of these committees vary, depending on the stage of development and commercialization of each product.

Under the AstraZeneca Agreements, the Company received an upfront, non-refundable payment of $45.0 million. In addition, the Company will receive payments to conduct a phase 1 clinical study for the AstraZeneca Lead Product. The Company is also eligible to receive research, development, commercial, sales milestone payments and royalty payments. The Company may receive tiered royalties on sales of potential products commercialized by AstraZeneca and for co-developed products, gross margin share on worldwide sales equal dependent on the Company’s level of committed investment.

Prior to the adoption of ASC 606, the budgeted research and development services for the AstraZeneca Lead Product increased and were approved by the JSC. The increases included additional phase 1 services as well as the addition of certain phase 2a services. The Company determined that these increases were contract modifications. Upon the adoption of ASC 606, the Company reflected the aggregate effects of these modifications as of the last modification date.

The Company determined that the AstraZeneca Agreements should be combined and evaluated as a single arrangement under ASC 606 as they were executed on the same date. The arrangement with AstraZeneca, including the impact of any modifications, provides for the transfer of the following goods and services: (i) ~~five~~5 non-exclusive platform technology licenses, (ii) research and development license for the AstraZeneca Lead Product, (iii) commercial license for the AstraZeneca Lead Product, (iv) development and manufacturing services for the AstraZeneca Lead Product (or the phase 1 services), (v) technology transfer services for the AstraZeneca Lead Product, (vi) research services related to the AstraZeneca Lead Product, (vii) participation on each of the committees, (viii) ~~four~~4 research licenses for the AstraZeneca Collaboration Products, (ix) ~~four~~4 commercial licenses for the AstraZeneca Collaboration Products, (x) research services for the AstraZeneca Collaboration Products and (xi) certain phase 2a services for the AstraZeneca Lead Product. Additionally, as the development licenses on the ~~four~~4 AstraZeneca Collaboration Products may be granted at a discount in the future, the Company determined such discounts should be assessed as material rights at inception.

Management evaluated all of the promised goods or services within the contract and determined which such goods and services

were separate performance obligations. The Company determined that the licenses granted for the AstraZeneca Lead Product at the inception of the arrangement should be combined with the research services related to the AstraZeneca Lead Product and that the licenses granted for the AstraZeneca Collaboration Products should be combined with the research services for the AstraZeneca Collaboration Products, as the licenses are not capable of being distinct. A third party would not be able to provide the research and development services, due to the specific nature of the intellectual property and knowledge required to perform

the services, and AstraZeneca could not benefit from the licenses without the corresponding services. The Company also determined that each of the phase 1 services and the phase 2a services for the AstraZeneca Lead Product were distinct and that the participation on the various committees was also distinct, as all of the phase 1 services, phase 2a services and the committee services could be performed by an outside party. The Company determined that the commercial licenses for the AstraZeneca Collaboration Products granted at the inception of the arrangement should be combined with the development licenses for the AstraZeneca Collaboration Products as the company would not benefit from the commercial license without the ability to develop each product.

As a result, management concluded that there were 16 performance obligations: (i) combined performance obligation comprised of a non-exclusive platform technology license, research and development license, and commercial licenses for the AstraZeneca Lead Product and research services for the AstraZeneca Lead Product, (ii) combined performance obligation comprised of development and manufacturing services, and technology transfer services for the AstraZeneca Lead Product, (iii) committee participation, (iv-vii) ~~four~~4 combined performance obligations each comprised of a non-exclusive platform technology license, research licenses, and research services for each AstraZeneca Collaboration Product, (viii-xi) four performance obligations comprised of a material right to acquire the development licenses granted for the AstraZeneca Collaboration Products, (xii-xv) four performance obligations comprised of the commercial licenses granted for the AstraZeneca Collaboration Products and (xvi) phase 2a services.

The Company allocated consideration to the performance obligations based on the relative proportion of their standalone selling prices. The Company developed standalone selling prices for licenses and corresponding research services by applying a risk adjusted, net present value, estimate of future potential cash flow approach, which included the cost of obtaining research services at arm’s length from a third-party provider, as well as internal full-time equivalent costs to support these services. The Company developed its standalone selling price for development and manufacturing services and technology transfer services for the AstraZeneca Lead Product using estimated internal and external costs to be incurred.

The Company developed its standalone selling price for committee participation by using management’s estimate of the anticipated participation hours multiplied by a market rate for comparable participants.

The Company developed its standalone selling price for the commercial licenses and material rights granted on the development licenses by probability weighting multiple cash flow scenarios using the income approach.

The transaction price iswas comprised of fixed consideration of $45.0 million in upfront fees and variable consideration of (i) $14.2 million in estimated phase 1 services, (ii) $12.5 million in milestone payments achieved upon the initiation of a phase 1 study in December 2017, and (iii) $4.7 million in estimated phase 2a services. The $45.0 million upfront fee, which represents the fixed consideration in the transaction price, was allocated to each of the performance obligations based on the relative proportion of their standalone selling prices. Variable consideration of $14.2 million is related to the phase 1 services and will be allocated entirely to the performance obligation to which they relate. Variable consideration of $12.5 million related to the phase 1 trial milestone was allocated by relative selling price to the combined performance obligation comprised of a non-exclusive platform technology license, research and development license and commercial licenses for the AstraZeneca Lead Product and research services for the AstraZeneca Lead Product, and the combined performance obligation comprised of development and manufacturing services and technology transfer services for the AstraZeneca Lead Product performance obligations. Variable consideration of $4.7 million for phase 2a services was allocated specifically to the related performance obligation.

The amounts allocated to the license performance obligation for the AstraZeneca Lead Product and the ~~four~~4 performance obligations for the ~~four~~4 research licenses for AstraZeneca Collaboration Products will be recognized on a proportional performance basis as the activities are conducted over the life of the arrangement. The amounts allocated to the performance obligation for phase 1 services, technology transfer services for the AstraZeneca Lead Product will be recognized on a proportional performance basis over the estimated term of development through phase 2a study. The amounts allocated to the performance obligation for phase 2a services for the AstraZeneca Lead Product will be recognized on a proportionate performance basis over an estimated term of 12 months. The amounts allocated to the performance obligation for participation on each of the committees will be recognized on a straight-line basis over the expected term of development of the AstraZeneca Lead Product and the AstraZeneca Collaboration Products. The term of performance is approximately five years. The amounts allocated to the four performance obligations for the material rights to acquire a development license and the four performance obligations for commercial licenses for the AstraZeneca Collaboration Products will be recognized upon exercise of the specific material right and delivery of each of the development licenses. As of September 30, ~~2019,~~2020, there was ~~$36.4~~$21.9 million of aggregate transaction price allocated to remaining performance obligations.

Additionally, the Company evaluated payments required to be made between both parties as a result of the shared development costs of the AstraZeneca Lead Product and the ~~two~~2 AstraZeneca Collaboration Products for which the Company has a co-development option. The Company will classify payments made as a reduction of revenue and will classify payments received as revenue in the period they are earned.

Under the AstraZeneca Agreements, the Company is eligible to receive various research, development, commercial and sales milestones. There is uncertainty that the events to obtain the research and development milestones will be achieved given the nature of clinical development and the stage of the Company’s technology. The Company has thus determined that all research and development milestones, other than the phase 1 initiation milestone achieved in December 2017 and included in the impact of adoption of ASC 606, will be constrained until it is deemed probable that a significant revenue reversal will not occur.

As of September 30, ~~2019,~~2020, there ~~is $11.6~~were $0.9 million and ~~$17.3~~$17.9 million of current and non-current deferred revenue, respectively, related to the AstraZeneca Agreements.

The Company incurred $1.6 million of third-party success fees to obtain the contract with AstraZeneca. Upon adoption of ASC 606, the Company capitalized $1.1 million in accordance with ASC 340. As of September 30, ~~2019,~~2020, the remaining balance of the asset recognized from transaction costs to obtain the AstraZeneca contract ~~is $1.0~~was $0.7 million. Amortization during the three ~~months ended September 30, 2019 was immaterial~~ and ~~during the~~ nine months ended September 30, ~~2019~~2020 was ~~$0.1 million.~~de minimis.

Servier

On January 4, 2017, the Company entered into a license and collaboration agreement, or Servier Collaboration Agreement, and a non-exclusive Anticalin platform license agreement, or Servier Platform License, and together with the Servier Collaboration Agreement, the Servier Agreements, with Les Laboratoires Servier and Institut de Recherches Internationales Servier, or Servier, pursuant to which the Company and Servier agreed to initially pursue ~~five~~5 bispecific therapeutic programs.

~~Five~~NaN committed programs were initially defined, which may combine antibodies from the Servier portfolio with ~~one~~1 or more Anticalin proteins based on the Company’s proprietary platform to generate innovative IO bispecific drug candidates, or the Collaboration Products. The collaboration may be expanded by up to ~~three~~3 additional therapeutic programs. The Company ~~has~~had the option to co-develop and retain commercial rights in the United States for PRS-332, the initial lead program under the collaboration, or the Initial Lead, ~~as well as~~and has a similar option on up to three additional programs, or the Co-Development Collaboration Products, while Servier will be responsible for development and commercialization of the other programs worldwide, or the Servier Worldwide Collaboration Products. Each party is responsible for an agreed upon percentage of shared costs, as set forth in the budget for the collaboration plan, and as further discussed below.

The Co-Development Collaboration Products may be jointly developed, according to a collaboration plan, through marketing approval from the U.S. Food and Drug Administration or the European Medicines Agency. Servier Worldwide Collaboration Products may be jointly developed, according to a collaboration plan, through specified preclinical activities, at which point Servier becomes responsible for further development of the Collaboration Product.

At inception, Servier was granted the following licenses: (i) development license for the Initial Lead, (ii) commercial license for the Initial Lead, (iii) individual research licenses for each of the ~~four~~4 Collaboration Products, and (iv) individual non-exclusive platform technology licenses for the Initial Lead and for each of the ~~four~~4 Collaboration Products. Upon achievement of certain development activities, specified by the collaboration for each Servier Agreement, Servier will be granted a development license and a commercial license. For the Initial Lead and the Co-Development Collaboration Products, the licenses granted are with

respect to the entire world except for the United States. For Servier Worldwide Collaboration Products, the licenses granted are with respect to the entire world.

The Servier Agreements are managed on an overall basis by a joint executive committee, or JEC, formed by an equal number of members from the Company and Servier. Decisions by the JEC will be made by consensus; however, in the event of a disagreement, each party will have final-decision making authority as it relates to the applicable territory in which such party has commercialization rights for the applicable product. In addition to the JEC, the Servier Collaboration Agreement requires the participation of both parties on: (i) a JSC, (ii) a JDC, (iii) a joint intellectual property committee, or JIPC, and (iv) a joint research committee, or JRC. The responsibilities of these committees vary, depending on the stage of development and commercialization of the Collaboration Products.

For the Initial Lead and Co-Development Collaboration Products, the Company and Servier are responsible for an agreed upon percent of the shared costs required to develop the products through commercialization. In the event that the Company fails to

exercise its option to co-develop the Co-Development Collaboration Products, Servier has the right to continue with the development and will be responsible for all costs required to develop the products through commercialization.

Under the Servier Agreements, the Company received an upfront, non-refundable payment of €30.0 million (approximately $32.0 million). In addition, the Company is eligible to receive research, development, commercial and sales milestone payments as well as tiered royalties up to low double digits on the sales of commercialized products in the Servier territories. The Company achieved ~~two~~2 preclinical milestones under the program, ~~one~~1 in December 2018 for €0.5 million (approximately $0.6 million) and another in February 2019 for €1.5 million (approximately $1.7 million), both of which became billable on their respective achievement dates.

The initial research collaboration term, as it relates to the Initial Lead and Collaboration Products, shall continue for three years from the effective date of the Servier agreements and may be mutually extended for ~~two~~2 one-year terms consecutively applied.

The term of each Servier Agreement ends upon the expiration of all of Servier’s payment obligations under such Servier Agreement. The Servier Agreements may be terminated by Servier for convenience beginning 12 months after their effective date upon 180 days’ notice. The Servier Agreements may also be terminated by Servier or the Company for material breach upon 90 days’ or 120 days’ notice under the Servier Collaboration Agreement and the Servier Platform License, respectively, provided that the applicable party has not cured such breach by the applicable 90-day or 120-day permitted cure period, and dispute resolution procedures specified in the applicable Servier Agreement have been followed. The Servier Agreements may also be terminated due to the other party’s insolvency or for a safety issue and may in certain instances be terminated on a product-by-product and/or country-by-country basis. The Servier Platform License will terminate upon termination of the Servier Collaboration Agreement, on a product-by-product and/or country-by-country basis.

As the Company and Servier are considered to be active participants in the Servier Agreements and are exposed to significant risks and rewards, certain units of account within the Servier Agreements are within the scope of ASC 808. The arrangement with Servier provides for the transfer of the following goods and services: (i) ~~five~~5 non-exclusive platform technology licenses, a development license, a commercial license and research and development services for the Initial Lead, (ii) participation on each of the committees, (iii) ~~four~~4 research licenses for Collaboration Products, and (iv) research and development services for the Collaboration Products. Additionally, as the development and commercial licenses on the ~~four~~4 Collaboration Products may be granted at a discount in the future, the Company determined such discounts should be assessed as material rights at inception.

Management evaluated all of the promised goods or services within the contract and determined which goods and services

were separate performance obligations. The Company determined that the licenses granted, at the inception of the Servier collaboration, should be combined with the research and development services to be provided for the Initial Lead and Collaboration Products, over the term of the Servier Agreements, as such licenses are not capable of being distinct. A third party would not be able to provide the research and development services, due to the specific nature of the intellectual property and knowledge required to perform the services, and Servier could not benefit from the licenses without the corresponding services. The Company determined that the participation on the various committees was distinct as the services could be performed by an outside party.

As a result, management concluded that there ~~are 14~~were 10 performance obligations at the inception of the Servier Agreements. The following performance obligations are within the scope of ASC 808: (i) combined performance obligation comprised of a non-exclusive platform technology license, commercial license, development license and research and development services for the Initial Lead, (ii) ~~four~~2 separate performance obligations each comprised of a combined non-exclusive platform technology license, research license and research and development services for each Co-Development Collaboration Product, (iii) ~~one~~1 performance obligation comprised of participation in the various governance committees, and (iv) ~~four~~2 combined performance obligations

comprised of the development and commercial licenses granted for the Co-Development Collaboration Products (and corresponding discounts) upon the achievement of specified preclinical activities, resulting in material rights. Revenue recognized associated with these performance obligations are presented as Collaboration Revenue within the Statement of Operations. The following performance obligations are within the scope of ASC 606: (i) two separate performance obligations each comprised of a combined non-exclusive platform technology license, research license and research and development services for each Servier Worldwide Collaboration Product, and (ii) two combined performance obligations comprised of the development and commercial licenses granted for the Servier Worldwide Collaboration Products (and corresponding discounts) upon the achievement of specified preclinical activities, resulting in material rights. Revenue recognized associated with these performance obligations are presented as Customer Revenue within the Statement of Operations.

The Company allocated consideration to the performance obligations based on the relative proportion of their standalone selling prices. The Company developed its standalone selling prices for licenses by applying a risk adjusted, net present value, estimate

of future potential cash flows approach, which included the cost of obtaining research and development services at arm’s length from a third-party provider, as well as internal full-time equivalent costs to support these services.

The Company developed its estimate of standalone selling price for committee participation by using management’s estimate of the anticipated participation hours multiplied by a market rate for comparable participants.

The Company developed its estimate of standalone selling price for the material rights granted on the development and commercial licenses granted for the Collaboration Products by probability weighting multiple cash flow scenarios using the income approach.

The transaction price at inception is comprised of the fixed upfront fee of €30.0 million (approximately $32.0 million) and was allocated to the performance obligations based on the relative proportion of their standalone selling prices.

The amounts allocated to the performance obligation for the Initial Lead and the ~~four~~4 performance obligations for the ~~four~~4 research and development licenses for Collaboration Products will be recognized on a proportional performance basis as the activities are conducted over the life of the arrangement. The term of the performance at inception of the Servier Agreements for the Initial Lead and each of the Co-Development Collaboration Products may be through approval of certain regulatory bodies; a period which could be many years. The term of the performance for each of the other two Servier Worldwide Collaboration Products is through the initial research and collaboration term, plus potential extensions. The amounts allocated to the performance obligation for participation on each of the committees will be recognized on a straight-line basis over the anticipated performance period over the entirety of the arrangement with Servier. The amounts allocated to the four performance obligations for the material rights to acquire development and commercial licenses for the Co-Development Collaboration Products are granted in the future will be recognized over time upon delivery of each of the licenses through marketing approval. The amounts allocated to the four performance obligations for the material rights to acquire development and commercial licenses for the Servier Developed Collaboration Products are granted in the future will be recognized upon delivery of each of the licenses. As of September 30, ~~2019,~~2020, there was ~~$19.2~~$11.2 million of aggregate transaction price allocated to remaining performance obligations.

Additionally, the Company evaluated payments required to be made between both parties as a result of the shared development costs of the Initial Lead and Collaboration Products. The Company will classify payments made as a reduction of revenue and will classify payments received as revenue, in the period they are earned.

Under the Servier Agreements, the Company is eligible to receive various research, development, commercial and sales milestones. There is uncertainty that the events to obtain the research and development milestones will be achieved given the nature of clinical development and the stage of the Company’s technology. The Company has thus determined that all research and development milestones will be constrained until it is deemed probable that a significant revenue reversal will not occur.

In September 2019, Servier notified the Company of its decision to discontinue co-development of PRS-332, a PD-1-LAG-3 bispecific that served as the initial development program under the Pieris-Servier alliance, for strategic reasons. The Company does not presently intend to continue development of PRS-332 but retains full rights to advance the development and commercialization of the product on a world-wide basis in the future. ~~Servier’s termination~~

In February 2020, the research term was extended for another 12 months. The Company has updated the transaction price for the extension for revenue recognition purposes and allocated it ratably over all unsatisfied performance obligations. In March 2020, Servier notified the Company of ~~the~~its decision to discontinue co-development of two earlier preclinical stage programs for strategic reasons based upon an extensive portfolio review. The notification required a 60-day period to complete remaining obligations on the ~~PRS-332 program does not impact~~programs; however, the ~~remainder~~Company determined that the material rights to acquire development and commercial licenses for one Co-Development Collaboration Product and for one Servier Developed Collaboration Products lapsed in March 2020 and recognized as revenue $7.1 million of previously deferred revenue associated with these material rights during the ~~Pieris-Servier alliance and the~~three-month period ended March 31, 2020. The parties continue to advance the development of two preclinical programs: PRS-344, ~~through IND-enabling activities. The Pieris-Servier alliance includes three additional programs beyond PRS-344, all of~~a 4-1BB/PD-L1 bispecific designed as a co-development program, and PRS-352, which ~~are in active preclinical development.~~addresses undisclosed targets and for which Servier has worldwide rights.

As of September 30, ~~2019,~~2020, there ~~is $5.5~~were $5.8 million and ~~$13.7~~$5.4 million of current and non-current deferred revenue, respectively, related to the Servier Agreements.

The Company incurred costs to obtain the contract with Servier. Upon adoption of ASC 606, the Company capitalized $0.5 million of third-party service fees in accordance with ASC 340. As of September 30, ~~2019,~~2020, the remaining balance of the asset ~~recognized~~

recognized from costs to obtain the Servier contract ~~is $0.3~~was $0.1 million. Amortization during the three and nine months ended September 30, ~~2019~~2020 was ~~$0.2 million.~~de minimis and $0.1 million, respectively.

~~ASKA~~

On February 27, 2017 the Company entered into an exclusive option agreement, or the ASKA Option Agreement, with ASKA Pharmaceutical Co., Ltd., or ASKA, pursuant to which Pieris granted ASKA an option to acquire (i) a non-exclusive license to certain intellectual property rights associated with the Company’s Anticalin platform and (ii) an exclusive license to certain intellectual property rights specifically related to the Company’s PRS-080 Anticalin protein in order to develop, manufacture, import, sale, export and offer for sale and export any pharmaceutical formulation containing PRS-080, the Company’s PEGylated Anticalin protein targeting hepcidin, or the Licensed Product, in Japan and certain other Asian territories.

Pieris is obliged to use commercially reasonable efforts to complete the phase 2a study for PRS-080 and to submit to ASKA, in writing, the final results of the study when available. Upon receipt, ASKA will have 60 days to evaluate the results of the phase 2a study, or the Evaluation Period. ASKA agreed to notify the Company, in writing, of its decision to exercise its option to acquire rights to the Licensed Product. If the phase 2a study meets the applicable success criteria and ASKA fails to provide notification that it will exercise its option, ASKA shall pay the Company an additional fee within 30 days of the end of the Evaluation Period. If ASKA exercises the option, ASKA and the Company will enter into a separate definitive arrangement governing the future development and commercialization activities.

The Company determined that the completed phase 2a study represents the sole good or service to be transferred, and the only performance obligation under the ASKA Option Agreement for which an upfront payment of $2.75 million was received from ASKA. The $2.75 million fixed upfront payment represents the transaction price at inception. The additional fee due if the phase 2a study meets the applicable success criteria and ASKA fails to provide notification that it will exercise its option represents variable consideration and will be constrained until it is deemed probable that a significant revenue reversal will not occur.

While the completion of the phase 2a study requires the completion of a number of actions, the Company determined that the finalization of the data and evaluation of results of the phase 2a study is the point at which revenue would be recognized. Therefore, no revenue was recognized in connection with this arrangement for the years ended December 31, 2018 and 2017, respectively. As of September 30, 2019, there is $2.8 million of current deferred revenue related to the ASKA Option Agreement.

In connection with obtaining the contract with ASKA, the Company additionally incurred $0.3 million in third-party service fees which were capitalized in accordance with ASC 340. As of September 30, 2019, the remaining balance of the asset recognized from costs to obtain the ASKA contract is $0.3 million.

Contract Balances

The Company receives payments from its collaboration partners based on payments established in each contract. Upfront payments and fees are recorded as deferred revenue upon receipt or when due until such time as the Company satisfies its performance obligations under each arrangement. A contract asset is a conditional right to consideration in exchange for goods or services that the Company has transferred to a customer. Amounts are recorded as accounts receivable when the Company’s right is unconditional.

There were no0 additions to deferred revenue during the three ~~and~~months ended September 30, 2020. Additions to deferred revenue were $1.6 million during the nine months ended September 30, ~~2019 and reductions~~2020. Reductions to deferred revenue were ~~$11.0~~$0.6 million and ~~$17.4~~$14.3 million for the three and nine months, respectively, ended September 30, ~~2019, respectively.~~2020.

4. Collaboration agreements

On August 10, 2020, the Company entered into a Clinical Trial Collaboration and Supply Agreement, or the Lilly Agreement, with Eli Lilly and Company, or Lilly, pursuant to which the Company and Lilly will collaborate on a phase 2 clinical study, or the Study, to determine the safety and efficacy of the Company's PRS-343 in combination with the standard of care regimen for the second-line treatment of advanced or metastatic gastric cancer, ramucirumab (CYRAMZA®) and paclitaxel for the second-line treatment of HER2+ gastric cancer.

Under the terms of the non-exclusive Lilly Agreement, the Company will sponsor the Study and Lilly will supply the Company with ramucirumab as well as provide input on certain clinical and regulatory aspects of the Study in exchange for jointly owning clinical data and inventions relating to the combination regimen that may arise from the Study. Any material changes to the protocol for the Study, and any changes relating to ramucirumab, will require Lilly’s prior written consent, which shall not be unreasonably withheld, conditioned or delayed.

The Lilly Agreement will expire upon completion of the parties’ contractual obligations. The Lilly Agreement may also be terminated (a) by either party for an uncured material breach by the other party upon 60 days’ notice, subject to a reasonable extension if such material breach requires more than 60 days to cure; (b) by either party in the event that the Study unreasonably affects patient safety, provided that the terminating party promptly notifies the other party and the other party is given the opportunity to propose modifications to the Study to address the safety issues; (c) by either party, following 15 days’ written notice, if regulatory action is taken preventing the terminating party from providing its compound or if the terminating party decides to discontinue development of its compound; (d) by either party, immediately upon written notice to the other party for breach by the other party of its material obligations under certain sections of the Lilly Agreement, or breach of certain of the other party's representations and warranties; and (e) by Lilly in the event of certain safety concerns related to the use of ramucirumab in the Study.

The Company has concluded that the Lilly Agreement is within the scope of ASC 808, which defines collaborative arrangements and addresses the presentation of the transactions between the two parties in the income statement and related disclosures. However, ASC 808 does not provide guidance on the recognition of consideration exchanged or accounting for the obligations that may arise between the parties. The Company has concluded that ASC 730, Research and Development, should be applied by analogy. There is no financial statement impact for the Lilly Agreement as the value of the drug supply received from Lilly is offset against the drug supply cost.

5. Cash, cash equivalents and investments

As of September 30, ~~2019~~2020 and December 31, ~~2018,~~2019, cash, cash equivalents and investments comprised of funds in depository, money market accounts, U.S. treasury securities, asset backed securities and corporate bonds.The following table presents the cash equivalents and investments carried at fair value in accordance with the hierarchy defined in Note 2 (in thousands):


										Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
September 30, 2020									September 30, 2020
Money market funds, included in cash equivalents									Money market funds, included in cash equivalents	$	54,910	$	54,910	$	0	$	0
	Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
September 30, 2019
Investments - U.S. treasuries									Investments - U.S. treasuries	8,999		8,999		0		0

Investments - Corporate bonds									Investments - Corporate bonds	6,751		0		6,751		0
Total									Total	$	70,660	$	63,909	$	6,751	$	0

December 31, 2019									December 31, 2019
Money market funds, included in cash equivalents	$	14,525	$	14,525	$	—	$	—	Money market funds, included in cash equivalents	$	47,384	$	47,384	$	0	$	0

Investments - U.S. treasuries	3,699		3,699		—		—		Investments - U.S. treasuries	5,300		5,300		0		0
Investments - Asset-backed securities	8,444		—		8,444		—		Investments - Asset-backed securities	7,950		0		7,950		0
Investments - Corporate bonds	28,032		—		28,032		—		Investments - Corporate bonds	28,644		0		28,644		0
Total	$	54,700	$	18,224	$	36,476	$	—	Total	$	89,278	$	52,684	$	36,594	$	0

December 31, 2018
Money market funds, included in cash equivalents	$	7,791	$	7,791	$	—	$	—
Corporate bonds, included in cash equivalents	10,910		—		10,910		—
Investments - U.S. treasuries	7,518		7,518		—		—
Investments - Asset-backed securities	5,758		—		5,758		—
Investments - Corporate bonds	39,964		—		39,964		—
Total	$	71,941	$	15,309	$	56,632	$	—

Cash equivalents and marketable securities have been initially valued at the transaction price and subsequently valued, at the end of each reporting period, utilizing ~~third party~~third-party pricing services or other market observable data. The pricing services utilize industry standard valuation models, including both income and market-based approaches and observable market inputs to determine value. The Company validates the prices provided by its third-party pricing services by reviewing their pricing methods and obtaining market values from other pricing sources, as needed. After completing its validation procedures, the Company did not adjust any fair value measurements provided by the pricing services as of September 30, ~~2019.~~2020.

Investments atas of September 30, ~~2019 consist~~2020 consisted of the following (in thousands):


	Contractual maturity (in days)	Amortized Cost		Unrealized gains		Unrealized losses		Fair Value
Investments
U.S. treasuries	48-78	$	9,215	$	0	$	(216)	$	8,999

Corporate bonds	2-64	6,854		2		(105)		6,751
Total		$	16,069	$	2	$	(321)	$	15,750

Contractual maturity
(in days) Amortized Cost Unrealized gains Unrealized losses Fair Value
Investments
U.S. treasuries 138-167 $ 3,631
$ 68
$ —
$ 3,699
Asset-backed securities 46-198 8,374
70
—
8,444
Corporate bonds 7-270 27,842
190
—
28,032
Total $ 39,847
$ 328
$ —
$ 40,175

The Company recorded $0.2 million and de minimis in realized losses from the maturity of available-for-sale securities during the three and nine months, respectively, ended September 30, 2020. The Company recorded realized gains of $0.1 million and $0.2 million from the maturity of available-for-sale securities ~~during~~for the three and nine months ended September 30, 2019, respectively. ~~The Company recorded $0.8 million and $0.7 million~~

As of ~~realized gains during the three and nine months ended~~ September 30, ~~2018, respectively.~~2020, there were no investments with a fair value that was significantly lower than the amortized cost basis or any investments that had been in an unrealized loss position for a significant period.

5.6. Property and equipment, net

Property and equipment are summarized as follows (in thousands):


	September 30,		December 31,
	2020		2019
Laboratory furniture and equipment	$	10,447	$	11,635
Office furniture and equipment	2,019		479
Computer equipment	373		245
Leasehold improvements	13,448		10,710
Property and equipment, cost	26,287		23,069
Accumulated depreciation	(4,892)		(3,567)
Property and equipment, net	$	21,395	$	19,502

September 30 December 31,
2019 2018
Laboratory equipment/furniture $ 8,062
$ 7,431
Office and computer equipment 702
661
Leasehold improvements 5,633
323
Property and equipment, at cost 14,397
8,415
Accumulated depreciation (3,389 ) (3,366 )
Property and equipment, net $ 11,008
$ 5,049

6.7. Accrued Expenses

Accrued expenses and other current liabilities consisted of the following (in thousands):


	September 30,		December 31,
	2020		2019
Accrued accounts payable	$	1,275	$	4,251
Compensation expense	2,656		2,870
Research and development fees	1,833		1,048
Lease liabilities	934		733
Audit and tax fees	126		522
Other current liabilities	664		520

Total	$	7,488	$	9,944

September 30 December 31,
2019 2018
Accrued license obligations $ 60
$ 2,523
Compensation expense 2,430
2,380
Professional fees 1,815
1,945
Research and development fees 1,405
943
Audit and tax fees 424
378
Other current liabilities 1,036
945
Total $ 7,170
$ 9,114

~~7. Stockholders´ Equity~~

~~The Company had 49,392,706 shares of common stock and 7,907 shares of preferred stock outstanding as of September 30, 2019, both with a par value of $0.001 per share.~~

~~Series B Preferred Stock~~

On January 30, 2019, the Company and certain entities affiliated with Biotechnology Value Fund, L.P., or BVF, entered into an exchange agreement pursuant to which BVF agreed to exchange an aggregate of 5,000,000 shares of the Company’s common stock owned by BVF for an aggregate of 5,000 shares of Series B Preferred Stock. On January 31, 2019, the Company designated 5,000 shares of its authorized and unissued preferred stock as Series B Preferred Stock and filed a Certificate of Designation of Series B Convertible Preferred Stock of Pieris Pharmaceuticals, Inc., or the Series B Certificate of Designation, with the Nevada Secretary of State.

Each share of Series B Preferred Stock is convertible into 1,000 shares of the Company's common stock (subject to adjustment as provided in the Series B Certificate of Designation) at any time at the option of the holder, provided that the holder is prohibited from converting the Series B Preferred Stock into shares of the Company's common stock if, as a result of such conversion, the holder, together with its affiliates, would own more than 9.99% of the total number of shares of Common Stock then issued and outstanding, or the Beneficial Ownership Limitation. The holder may reset the Beneficial Ownership Limitation to a higher or lower number, not to exceed 19.99% of the total number of common shares issued and outstanding immediately after giving effect to a conversion, upon providing written notice to the Company. Any such notice providing for an increase to the Beneficial Ownership Limitation will be effective 61 days after delivery to the Company.

In the event of the Company’s liquidation, dissolution or winding up, subject to the rights of holders of Senior Securities (defined below), holders of Series B Preferred Stock are entitled to receive a payment equal to $0.001 per share of Series B Preferred Stock before any proceeds are distributed to the holders of common stock and Junior Securities (defined below) and ~~pari passu~~ with any distributions to the holders of the previously issued Series A convertible preferred stock, or the Series A Preferred Stock, plus an additional amount equal to any dividends declared but unpaid on such shares. However, if the assets of the Company are insufficient to comply with the preceding sentence, then all remaining assets of the Company shall be distributed ratably to holders of the shares of the Series B Preferred Stock and Parity Securities (defined below).

Shares of Series B Preferred Stock generally have no voting rights, except as required by law and except that the consent of holders of a majority of the then outstanding Series B Preferred Stock is required to amend the terms of the Series B Certificate of Designation. Holders of Series B Preferred Stock are entitled to receive any dividends payable to holders of the Company's common stock and rank:

~~senior to all of the Company's common stock;~~

senior to any class or series of capital stock of the Company created after the designation of the Series B Preferred Stock specifically ranking by its terms junior to the Series B Preferred Stock, or the Junior Securities;

on parity with all shares of Series A Preferred Stock and any class or series of capital stock of the Company created after the designation of the Series B Preferred Stock specifically ranking by its terms on parity with the Series B Preferred Stock, or the Parity Securities; and

junior to any class or series of capital stock of the Company created after the designation of the Series B Preferred Stock specifically ranking by its terms senior to the Series B Preferred Stock, or the Senior Securities;

~~in each case, as to distributions of assets upon the Company’s liquidation, dissolution or winding up whether voluntarily or involuntarily and/or the right to receive dividends.~~

~~2019 Employee, Director and Consultant Equity Incentive Plan~~

At the Annual Shareholder Meeting, held on July 31, 2019, the shareholders approved the 2019 Employee, Director and Consultant Equity Incentive Plan, or the 2019 Plan. The 2019 Plan permits the Company to issue up to 2,750,000 shares of common stock pursuant to awards granted under the 2019 Plan. Upon approval of the 2019 Plan, the 2018 Employee, Director and Consultant Equity Incentive Plan, or the 2018 Plan, was terminated; all unissued options will be cancelled and no additional awards will be made thereunder. All outstanding awards under the 2018 Plan will remain in effect and any awards forfeited from the outstanding awards will be recycled into the 2019 Plan. There were approximately 931,896 shares remaining and available for grant under the 2018 Plan that terminated with the 2018 Plan.

~~Open Market Sale Agreement~~

~~On August 9, 2019, the Company entered into an Open Market Sale Agreement~~^SM, or the “Sale Agreement” with Jefferies LLC, or “Jefferies”, pursuant to which the Company may offer and sell shares of its common stock, par value $0.001 per share, having aggregate gross sales proceeds of $50.0 million, or the Shares, from time to time, through an “at the market offering” program under our shelf registration statement on Form S-3 (File No. 333-226725). To date, the Company has not sold any Shares under the Sales Agreement.

~~2019 Private Placement~~

In November 2019, the Company entered into a securities purchase agreement for a private placement (the “Purchase Agreement”) with a select group of institutional investors, including lead investor BVF Inc. and its affiliates (“BVF”) as well as existing and new investors (the “Investors”). At the time of entering into the Purchase Agreement, BVF was a more than 5% stockholder of the Company, holding shares of common stock, Series A Preferred Stock, Series B Preferred Stock and warrants to purchase shares of common stock.

The private placement consisted of 9,014,960 units, at a price of $3.55 per unit (the “Financing”), for gross proceeds of approximately $32.0 million, and net proceeds to the Company of approximately $31.1 million. Each unit consists of (i) one share of the Company’s common stock (the “Common Shares”) or 0.001 shares of non-voting Series C convertible preferred stock (the “Series C Preferred Shares,” and together with the Common Shares, the “Shares”), and (ii) one immediately-exercisable warrant to purchase one share of the Company’s common stock with an exercise price of $7.10 (the “Exercise Price”).

If (i) the initial public disclosure of the Phase 2a Study of PRS-060/AZD1402 that includes the “p” value achieved for the primary endpoint of such study reveals top-line data on the primary efficacy endpoint in the Phase 2a Study with a “p” value below 0.05 (i.e., p < 0.05) in at least one dose level; and (ii) the 10-day volume weighted average stock price commencing on the trading day immediately after the initial data disclosure is at least three percent more than the Exercise Price, then the warrants will be exercisable for a period of 60 days from the date of the initial data disclosure and may only be exercised for cash. Otherwise, the warrants will be exercisable for a period of five years from the date of issuance.

Each Preferred Share is convertible into 1,000 shares of the Company’s common stock. The Company will not undertake any conversion of the Series C Preferred Shares, and a stockholder shall not have the right to convert any portion of the Series C Preferred Shares, to the extent that, after giving effect to the conversion such stockholder would beneficially own in excess of 9.99% of the number of shares of the Company’s common stock outstanding immediately after giving effect to such conversion. The Series C Preferred Shares have no voting rights, except as required by law and except that the consent of holders of a majority of the then outstanding Series C Preferred Stock is required to amend the terms of the Series C Certificate of Designation. The Series C Preferred Shares are entitled to receive dividends on a ~~pari passu~~ basis with the Company’s common stock, when, and if declared. In any liquidation or dissolution of the Company, the Series C Preferred Shares rank senior to the Company’s common stock in the distribution of assets, to the extent legally available for distribution.

The Company also entered into a registration rights agreement (the “Registration Rights Agreement”) with the Investors in November 2019 in connection with the Financing requiring the Company to register the resale of the Shares and the Company’s common stock underlying the Series C Preferred Shares and warrants. The Company is required to prepare and file a registration statement with the Securities and Exchange Commission within 30 days of the closing, and to use commercially

reasonable efforts to have the registration statement declared effective within 90 days if there is no review by the Securities and Exchange Commission, and within 120 days in the event of such review.

The Shares and the warrants were offered and will be issued and sold in reliance upon the exemption from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), set forth under Section 4(a)(2) of the Securities Act relating to sales by an issuer not involving any public offering and in reliance on similar exemptions under applicable state laws.

8. Net Loss per Share

Basic net loss per share is calculated by dividing net income ~~(loss)~~loss by the weighted average shares outstanding during the period, without consideration for common stock equivalents. Diluted net loss per share is calculated by adjusting weighted average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period, determined using the treasury-stock and if-converted methods. For purposes of the diluted net loss per share calculation, preferred stock, stock options and warrants are considered to be common stock equivalents but have been excluded from the calculation of diluted net loss per share, as their effect would be anti-dilutive for all periods presented. Therefore, basic and diluted net loss per share were the same for all periods presented.

For the three months ended September 30, ~~2019~~2020 and ~~2018,~~2019, and as calculated using the treasury stock method, approximately ~~21.7~~37.3 million and ~~14.7~~21.7 million of weighted average shares, respectively, were excluded from the calculation of diluted weighted average shares outstanding as their effect was ~~anti-dilutive.~~antidilutive.

9. ~~License and Transfer Agreement~~

~~License and Collaboration Agreement with the Technical University of Munich~~Stockholders' Equity

The Company had 300,000,000 shares authorized and ~~the Technical University~~55,970,580 and 55,212,437 shares of ~~Munich, or TUM, initiated discussions in the second quarter~~common stock issued and outstanding as of ~~2018 to clarify, expand~~September 30, 2020 and ~~restructure their 2013 research and licensing agreement~~December 31, 2019, respectively, with TUM, or the TUM License, including the parties’ obligations under the TUM License. The TUM License assigns or exclusively licenses to the Company certain intellectual property related to the Company's Anticalin platform technology. The parties' recent discussions relate to revised commercial terms and to re-initiating additional collaborations between faculty at TUM and the Company. While an amended and restated license agreement has not yet been completed, the Company intends to enter into such an amendment. a par value of $0.001 per share.

The Company ~~recorded the probable expected impact~~had 10,000,000 shares authorized and 14,429 shares of ~~the amendment in research~~preferred stock issued and ~~development expense~~outstanding as of September 30, 2020. The Company had 10,000,000 shares authorized and 11,429 shares of preferred stock issued and outstanding as of December 31, ~~2018,~~2019. Preferred stock has a par value of $0.001 per share, and consists of the following:

•Series A Convertible, 2,907 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively.

•Series B Convertible, 5,000 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively.

•Series C Convertible, 3,522 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively.

•Series D Convertible, 3,000 and 0 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively.

2020 Employee, Director and Consultant Equity Incentive Plan

At the Annual Shareholder Meeting, held on June 23, 2020, the shareholders approved the 2020 Employee, Director and Consultant Equity Incentive Plan, or the 2020 Plan. The 2020 Plan permits the Company to issue up to 3,500,000 shares of common stock pursuant to awards granted under the 2020 Plan. Upon approval of the 2020 Plan, the 2019 Employee, Director and Consultant Equity Incentive Plan, or the 2019 Plan, was terminated; all unissued options were canceled and no additional awards will be made thereunder. All outstanding awards under the 2019 Plan will remain in effect and any awards forfeited from the outstanding awards will be allocated back into the 2020 Plan. There were approximately 1,579,678 shares remaining and available for grant under the 2019 Plan that terminated upon approval of the 2020 Plan.

Series B Preferred Stock Conversion

2019 Private Placement

In November 2019, the Company entered into a securities purchase agreement for a private placement, or the Purchase Agreement, with a select group of institutional investors, including lead investor BVF as well as existing and new investors, or Investors. At the time of entering into the Purchase Agreement, BVF was a more than 5% stockholder of the Company, holding shares of common stock, Series A Preferred Stock, Series B Preferred Stock and warrants to purchase shares of common stock.

The private placement consisted of 9,014,960 units, at a price of $3.55 per unit for gross proceeds of approximately $32.0 million, and net proceeds to the Company of approximately $31.0 million. Each unit consists of (i) 1 share of the Company’s common stock, or Common Shares, or 0.001 shares of non-voting Series C convertible preferred stock, or Series C Preferred Shares, and together with the Common Shares, or Shares, and (ii) 1 immediately-exercisable warrant to purchase 1 share of the Company’s common stock with an exercise price of $7.10, or Exercise Price.

If (i) the initial public disclosure of the phase 2a study of PRS-060/AZD1402 that includes the “p” value achieved for the primary endpoint of such study reveals top-line data on the primary efficacy endpoint in the phase 2a study with a “p” value below 0.05 (i.e., p < 0.05) in at least one dose level; and (ii) the 10-day volume weighted average stock price commencing on the trading day immediately after the initial public disclosure is at least three percent more than the Exercise Price, ((i) and (ii), collectively, the “Performance Condition”), then the warrants will be exercisable for a period of 60 days from the date of the initial data disclosure and may only be exercised for cash. Otherwise, the warrants will be exercisable for a period of five years from the date of issuance. If the Performance Condition has not been met and the last reported sale price of the Company’s common stock immediately prior to the Expiration Date was greater than the Exercise Price, then the warrants shall be automatically deemed exercised on a cashless basis on the Expiration Date.

Upon issuance, each Series C Preferred Share included an embedded beneficial conversion feature as the market price of the Company’s Common Stock on the date of issuance of the Series C convertible preferred stock was $3.43 per share. As a result, the Company recorded the intrinsic value of the beneficial conversion feature of $2.8 million as a discount on the Series C convertible preferred stock at issuance. As the Series C Preferred Shares are immediately convertible upon issuance and do not include a stated redemption date, the discount was immediately accreted as a deemed dividend.

The terms of the Series C Preferred Shares, specifically voting rights, rights of conversion, beneficial ownership limitations, entitlement to dividends and distributions upon liquidation or dissolution, are identical to the Series B Preferred Shares.

Series D Preferred Stock Conversion

On March 31, 2020, the Company and certain entities affiliated with BVF entered into an exchange agreement pursuant to which, on April 1, 2020, BVF exchanged an aggregate of 3,000,000 shares of the Company’s common stock owned by BVF for an aggregate of 3,000 shares of Series D Preferred Stock. The Company designated 3,000 shares of its authorized and unissued preferred stock as Series D Preferred Stock and filed a Certificate of Designation of Series D Convertible Preferred Stock of Pieris Pharmaceuticals, Inc., or the Series D Certificate of Designation, with the Nevada Secretary of State.

Each share of Series D Preferred Stock is convertible into 1,000 shares of Common Stock (subject to adjustment as provided in the Series D Certificate of Designation) at any time at the option of the holder, provided that the holder is prohibited from converting the Series D Preferred Stock into shares of Common Stock if, as a result of such conversion, the holder, together with its affiliates, would own more than 9.99% of the total number of shares of Common Stock then issued and outstanding. The holder may reset the Beneficial Ownership Limitation to a higher or lower number (not to exceed 19.99% of the total number of Common Shares issued and outstanding immediately after giving effect to a conversion) upon providing written notice to the Company. Any such notice providing for an increase into the ~~Company's financial obligations associated~~Beneficial Ownership Limitation will be effective 61 days after delivery to the Company. In the event of the Company’s liquidation, dissolution, or winding up, subject to the rights of holders of Senior Securities (defined below), holders of Series D Preferred Stock are entitled to receive a payment equal to $0.001 per share of Series D Preferred Stock before any proceeds are distributed to the holders of Common Stock and Junior Securities (defined below) and pari passu with any distributions to the holders of the Series A Preferred Stock, Series B

Preferred Stock and Series C Preferred Stock, plus an additional amount equal to any dividends declared but unpaid on such shares. However, if the assets of the Company are insufficient to comply with the ~~TUM License~~preceding sentence, then all remaining assets of ~~approximately $2.3 million, for amounts~~the Company shall be distributed ratably to holders of the shares of the Series D Preferred Stock and Parity Securities (defined below). Shares of Series D Preferred Stock generally have no voting rights, except as required by law and except that ~~would be due~~ the consent of holders of a majority of the then outstanding Series D Preferred Stock is required to amend the terms of the Series D Certificate of Designation. Holders of Series D Preferred Stock are entitled to receive any dividends payable to holders of Common Stock, and rank:

•senior to all of the Common Stock;

•senior to any class or series of capital stock of the Company created after the designation of the Series D Preferred Stock specifically ranking by its terms junior to the Series D Preferred Stock (the “Junior Securities”);

•on parity with all shares of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and any class or series of capital stock of the Company created after the designation of the Series D Preferred Stock specifically ranking by its terms on parity with the Series D Preferred Stock (the "Parity Securities”); and

•junior to any class or series of capital stock of the Company created after the designation of the Series D Preferred Stock specifically ranking by its terms senior to the Series D Preferred Stock (the “Senior Securities”),

in each case, as to distributions of assets upon the Company’s liquidation, dissolution or winding up whether voluntarily or involuntarily and/or the right to receive dividends.

Open Market Sales Agreement

In August 2019, ~~for 2018~~the Company entered into a sales agreement pursuant to which the Company may offer and ~~2017 sub-licensing activities. This liability was paid in full during the quarter ended September 30, 2019. These discussions may also lead~~sell shares of its common stock, from time to time, up to an ~~increase~~aggregate gross sales proceeds of $50.0 million through an “at the market offering” program, or the ATM Program, under a shelf registration statement on Form S-3. In the third quarter of 2020, the Company sold 3,571,428 shares at a price of $2.80 per share under the ATM Program. The transaction resulted in gross proceeds of $10.0 million, less a 3% contractual commission incurred for the ~~Company's collaborative research activities with TUM.~~sales agent, resulting in $9.7 million in net proceeds to the Company.

10. Leases

The Company currently leases office space in Boston, Massachusetts. In August 2015, the Company entered into a sublease to lease approximately 3,950 square feet. The sublease expires on February 27, 2022 or such earlier date pursuant to the termination provisions of the sublease.

The Company also leased approximately 19,000 square feet of office and laboratory space in Freising, Germany under 4 agreements, the Freising Leases, including 3 leases for space on three floors of the same building and a letter agreement for additional conference room space within the building. The Freising Leases expired on March 31, 2020.

In October 2018, Pieris GmbH entered into a new lease for office and laboratory space located in Hallbergmoos, ~~Germany.~~ Germany, or the Hallbergmoos Lease. Pieris GmbH moved its operations, formerly conducted in Freising, Germany, to the Hallbergmoos facility in February 2020.

Under the Hallbergmoos Lease, ~~Agreement,~~ Pieris GmbH will rent approximately 105,000 square feet, of which approximately ~~96,400~~98,400 square feet ~~is expected to be~~were delivered by the lessor in ~~the fourth quarter of 2019~~February 2020 and approximately ~~8,600~~5,100 square feet ~~is expected to be~~were delivered by the lessor byin May 2020. An additional approximately 22,300 square feet is expected to be delivered by the lessor by October 2024. Pieris GmbH has a first right of refusal to lease an additional approximate 13,400 square feet. ~~Pieris GmbH intends to move its operations currently conducted in Freising, Germany to the new leased property.~~

The Hallbergmoos Lease ~~Agreement~~ provides for an initial rental term of 12.5 years ~~commencing on the date the lessor first delivers~~which commenced in February 2020 when the leased property was delivered to Pieris ~~GmbH as agreed under the lease agreement.~~GmbH. Pieris GmbH also has an option to extend the ~~term of~~Hallbergmoos Lease for 2 additional 60-month periods. The Company is not reasonably certain to exercise the ~~Lease Agreement for two additional 60 months periods.~~option to extend the lease expiration beyond its current expiration date. Pieris GmbH may sublease space within the leased property with lessor’s consent, which may not be unreasonably withheld.

Monthly base rent for the initial 105,000 square feet of the leased property, including parking spaces, will total approximately $0.2 million per month, which amount shall be adjusted starting on the second anniversary of the commencement date by an amount equal to the German consumer price index. In addition to the base rent, Pieris GmbH is also responsible for certain administrative and operational costs in accordance with the ~~terms of the Lease Agreement.~~Hallbergmoos Lease. Pieris GmbH provided a security deposit of $0.8 million as ~~of December 31, 2018.~~required by the Hallbergmoos Lease. The Company will serve as a guarantor for the ~~Lease Agreement.~~Hallbergmoos Lease.

The Hallbergmoos ~~lease~~Lease included ~~$11.2~~$11.5 million of tenant improvements allowance for normal tenant improvements, for which construction began in March 2019. The date of the construction coincided with the lease commencement date for accounting purposes under ~~FASB~~ ASC 840,~~Leases~~.which did not change with the adoption off ASC 842. The Company ~~recorded~~capitalized the leasehold incentives which are included in Property and equipment, net on the Condensed Consolidated Balance Sheet and are amortized on a straight-line ~~rent expense~~basis over the shorter of ~~$0.8~~the useful life or the remaining lease term. The lease incentive allowance was also factored in as a reduction to the right-of-use asset upon the adoption of ASC 842.

The following table summarizes operating lease costs included in operating expenses (in thousands):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Operating lease costs	$	360	$	419	$	1,134	$	1,060
Variable lease costs (1)	192		71		536		207
Total lease cost	$	552	$	490	$	1,670	$	1,267
(1) Variable lease costs include certain additional charges for operating costs, including insurance, maintenance, taxes, utilities, and other costs incurred, which are billed based on both usage and as a percentage of the Company’s share of total square footage.

The following table summarizes the weighted-average remaining lease term and discount rate:


	As of September 30, 2020
Weighted-average remaining lease term (years)	11.7
Weighted-average discount rate	10.5	%

Cash paid for amounts included in the measurement of the lease liabilities was $0.6 million ~~during~~and $1.5 million for the three and nine months ended September 30, ~~2019 and a deferred rent liability of $12.1 million, inclusive of a tenant improvement allowance of $11.2 million which the Company is amortizing as a reduction of rent expense over the lease term.~~ 2020.

As of September 30, ~~2019,~~2020, the ~~entire deferred rent liability was classified~~maturities of the Company’s operating lease liabilities and future minimum lease payments were as ~~non-current deferred rent on the consolidated balance sheet.~~follows (in thousands):


	Total
2020	$	628
2021	2,513
2022	2,344
2023	2,309
2024	2,309
Thereafter	17,512
Total undiscounted lease payments	27,615
Less: present value adjustment	(11,254)
Present value of lease liabilities	$	16,361



Item 2.			Management's Discussion and Analysis of Financial Condition and Results of Operations.

The interim financial statements and this Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with the financial statements and notes thereto for the year ended December 31, ~~2018,~~2019, and the related Management’s Discussion and Analysis of Financial Condition and Results of Operations, both of which are contained in our Annual Report on Form 10-K for the fiscal year ended December 31, ~~2018,~~2019, filed with the SEC on March ~~18, 2019.~~13, 2020. In addition to historical information, this discussion and analysis contains forward-looking statements that involve risks, uncertainties and assumptions. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of certain factors, including but not limited to those set forth under the caption “Risk Factors” in the Annual Report on Form 10-K for the fiscal year ended December 31, ~~2018.~~2019 and the Quarterly Reports on Form 10-Q for the quarter ended March 31, 2020 and June 30, 2020.

As used in this Quarterly Report on Form 10-Q, unless the context indicates or otherwise requires, “our Company”, “the Company”, “Pieris”, “we”, “us” and “our” refer to Pieris Pharmaceuticals, Inc., a Nevada corporation, and its consolidated subsidiaries.

We have registered trademarks for Pieris, Anticalin and others. All other trademarks, trade names and service marks included in this Quarterly Report on Form 10-Q are the property of their respective owners. Use or display by us of other parties’ trademarks, trade dress or products is not intended to and does not imply a relationship with, or endorsements or sponsorship of, us by the trademark or trade dress owner.

Overview

We are a clinical-stage biotechnology company that discovers and develops Anticalin-based drugs to target validated disease pathways in unique and transformative ways. Our clinical pipeline includes an inhaled IL-4Rα antagonist Anticalin protein to treat uncontrolled asthma, and an immuno-oncology (IO) bispecific targeting HER2 and 4-1BB. Proprietary to us, Anticalin proteins are a novel class of therapeutics validated in the clinic and through partnerships with leading pharmaceutical companies. Our ~~development~~core Anticalin technology and platform were developed in Germany, and we have collaborations with major multi-national pharmaceutical companies. In particular, we have an alliance with AstraZeneca to treat respiratory diseases and partnerships with Servier and Seagen (formerly known as Seattle Genetics, Inc.), both in IO. Our programs include:

~~PRS-060~~,•PRS-060/AZD1402, our lead respiratory program partnered with AstraZeneca, is a drug candidate that antagonizes IL-4Rα, thereby inhibiting IL-4 and IL-13, two cytokines known to be key mediators in the inflammatory cascade that drive the pathogenesis of asthma and other inflammatory diseases. We are sponsoring the phase 1 studies and AstraZeneca is funding the costs. AstraZeneca will conduct and fund the phase 2a study, after which we will have separate options to co-develop and co-commercialize PRS-060/AZD1402 in the United States.

~~We are developing additional~~•Additional respiratory drug candidates beyond PRS-060/AZD1402, both within and outside of the AstraZeneca alliance. ~~The AstraZeneca~~In addition to PRS-060/AZD1402, the alliance includes four respiratory programs, ~~beyond PRS-060/AZD1402,~~ the targets and disease areas ~~for~~of which are undisclosed. We retain co-development and co-commercialization rights to two out of ~~those~~the four programs ~~and initiated an additional discovery-stage~~beyond PRS-060/AZD1402. Our portfolio also includes several respiratory ~~program in our alliance with~~programs outside of the AstraZeneca in the prior quarter, bringing the total number of active programs to four; AstraZeneca may initiate one additional program within the alliance. We also initiated an additional proprietary respiratory discovery-stage program and continue to advance the two proprietary discovery-stage programs initiated in 2018.collaboration.

•PRS-343, our lead IO program, is a fusion protein comprising a HER2-targeting antibody genetically linked to 4-1BB-targeting Anticalin proteins. PRS-343 is designed to drive tumor-localized T-cell activation through tumor-targeted drug clustering mediated by HER2 expressed on tumor cells. This program was the first bispecific T-cell ~~costimulatory~~co-stimulatory agonist to enter clinical development.

~~We are also developing additional~~•Additional IO drug candidates beyond PRS-343 that are multispecific Anticalin-based fusion proteins designed to engage immunomodulatory targets, comprising a variety of multifunctional biotherapeutics, including PRS-344, a bispecific antibody-Anticalin fusion protein comprising an PD-L1-targeting antibody genetically fused to Anticalin proteins specific for 4-1BB. PRS-344 is being developed as part of our IO collaboration with Servier. Other IO drug candidates are being developed as part of our collaboration with Servier and Seagen.

~~PRS-080~~ is an Anticalin protein that binds to hepcidin, a natural regulator of iron in the blood. PRS-080 is designed to target hepcidin for the treatment of functional iron deficiency in anemic patients with chronic kidney disease, or CKD, particularly in end-stage renal disease patients requiring dialysis.

Our programs are in varying stages:

•PRS-060/AZD1402 was tested in a nebulized formulation in 54 healthy volunteers at nominal dose levels ranging from 0.25 mg to 400 mg in a phase 1 ~~single ascending dose, or~~ SAD ~~study; the drug candidate was safe and well-tolerated in the volunteers in that~~ study. Data from ~~the PRS-060/AZD1402 phase 1 SAD~~that study ~~was~~were presented at the American Thoracic Society International Conference in May 2019 showing that ~~(i)~~ PRS-060/AZD1402 was well tolerated when given as a single inhaled or intravenous doses to healthy ~~volunteers; (ii)~~volunteers and there was systemic target engagement (as measured by pSTAT6 inhibition)~~; and (iii) the overall profile of PRS-060/AZD1402 in the phase 1 SAD study supports its further development as an inhaled drug for the treatment of asthma.~~. We presented interim data from the PRS-060/AZD1402 phase 1 MAD study at the ~~2019~~ European Respiratory

Society International Congress in October 2019 and reported that PRS-060/AZD1402 was safe and well-tolerated at all doses, led to a statistically significant reduction in FeNO, a validated biomarker for eosinophilic airway inflammation, and showed dose-dependent systemic target engagement in patients with mild asthma and elevated levels of FeNO (≥ 35ppb). ~~During~~In that study, during the treatment period, 30 patients were randomized to receive delivered doses of PRS-060/AZD1402 ranging from 2 mg to 60 mg (5 mg to 150 mg administered through a nebulizer (nominal dose)) twice ~~a day~~daily for nine consecutive days and one final dose on the 10th day, and 12 patients were randomized to receive placebo at the same intervals. Statistically significant and pronounced inhibition of FeNO relative to placebo was observed at all doses. When comparing the ~~20mg~~20 mg PRS-060/AZD1402 powered cohort (n=12) to placebo, the primary statistical analysis using the ~~emax~~Emax model demonstrated a 36% relative reduction in FeNO (p-value <0.0001). Systemic target engagement was dose-dependent and closely aligned with systemic exposure of the drug, consistent with results of the phase 1 SAD study. No systemic target engagement and minimal systemic exposure was observed at the ~~2mg~~2 mg dose, suggesting that local target engagement by the drug may be sufficient to reduce airway inflammation, as evidenced by FeNO reduction at that ~~2mg~~2 mg dose level. ~~Following these reported results,~~

AstraZeneca ~~and Pieris are preparing to move into~~submitted the first Clinical Trial Application for a global phase 2a study of PRS-060/AZD1402. Dependent on regulatory approval, site initiation and patient screening are expected to begin this year. The first patients will be dosed thereafter, which we anticipate will be in the first quarter of next year, triggering a milestone payment from AstraZeneca. The phase 2a study will be performed using a dry powder formulation and will evaluate the efficacy, safety, and pharmacokinetics of PRS-060/AZD1402 in moderate uncontrolled asthmatics over four weeks with FEV1 improvement as the primary endpoint, following a four-week dosing arm in moderate controlled asthmatics to establish the safety and pharmacokinetics of the dry powder formulation. The study of PRS-060/AZD1402, which is being developed for the treatment of moderate-to-severe ~~asthmatics~~asthma, is being sponsored, funded, and delivered by AstraZeneca. Upon completion of that study, Pieris will have the options to co-develop and, subsequently, co-commercialize PRS-060/AZD1402 in ~~2020.~~the United States.

•Our additional respiratory programs within and outside of the AstraZeneca alliance are in the discovery stage. AstraZeneca initiated the fourth program in the collaboration in the third quarter, taking full advantage of all available potential new project starts envisioned in the alliance. We retain co-development and co-commercialization rights to two out of the four programs beyond PRS-060/AZD1402. Outside of the AstraZeneca collaboration, Pieris continues to advance several proprietary respiratory programs, which are in the discovery stage.

•We presented ~~interim~~additional detailed data from the phase 1 monotherapy study and atezolizumab combination study of PRS-343 in an oral presentation session at ~~a late-breaking presentation~~the European Society for Medical Oncology, or ESMO, Virtual Congress in September 2020. As of the July 2020 cutoff date, 74 patients had been enrolled in the monotherapy study, including 21 additional patients enrolled in the active dose cohorts (≥2.5 mg/kg) since the data were presented at the Society for Immunotherapy of Cancer ~~(SITC) annual meeting on November 9, 2019. We reported that~~2019 Annual Meeting, and 41 patients had been enrolled in the atezolizumab combination therapy study. In the monotherapy study, out of 33 response-evaluable patients at the time of the data cutoff of July 27, 2020, according to RECIST 1.1, one patient with stage 4 rectal adenocarcinoma achieved a confirmed complete response at the 18 mg/kg Q2W dose (cohort 13b), three patients achieved a partial response at the 8 mg/kg Q2W dose (cohort 11b), and stable disease was observed in 13 patients as best response out of 33 evaluable patients across the predicted active dose ranges (cohorts 9-13b), translating to an ORR of 12% and a DCR of 52%. Additionally, a significant expansion of CD8+ T cells in the tumor microenvironment of responders and a substantial increase of peripheral soluble 4-1BB were observed in the active dose cohorts, suggesting 4-1BB-mediated target engagement. PRS-343 ~~was well tolerated and had a favorable~~also showed an acceptable safety profile at all doses and schedules tested ~~demonstrated anti-tumor activity~~ in each clinical study. In the atezolizumab combination trial, seven dose cohorts have been evaluated at a ~~heavily pre-treated patient population across multiple tumor types~~Q3W dosing schedule ranging from 0.05 mg/kg to 8 mg/kg in combination with a fixed 1200 mg dose of atezolizumab. In that trial, under RECIST 1.1, four patients achieved a confirmed partial response at active dose levels. The Company plans to advance PRS-343 into a phase 2 study for the second-line treatment of gastric cancer in combination with ramucirumab and ~~showed~~paclitaxel.

In July 2020, we announced that our phase 1 studies of PRS-343 have been placed on partial clinical hold by the FDA while we conduct an additional in-use stability and compatibility study requested by the FDA. Treatment of currently-enrolled patients may continue, although no new patients can be enrolled until resolution of the partial hold. The Company has completed the in-use studies it deems necessary in connection with the partial clinical hold of the PRS-343 phase 1 studies. As part of the now-completed studies that supported a ~~potent increase in CD8+ T cell numbers~~robust process for administration of PRS-343 in the ~~tumor microenvironment~~clinical setting, we have optimized the level of ~~responders, indicative~~an existing excipient to enhance the stability of ~~4-1BB agonism on T cells. Pieris continues to enroll patients~~PRS-343 under prescribed as well as stressed conditions that could occur in ~~that study at higher dose cohorts and plans to initiate an expansion trial~~preparation of the drug candidate ~~next year.~~ for patient administration in the real-world clinical setting.

We ~~also continue~~recently provided these results to ~~enroll~~FDA in the ~~dose-escalation~~form of a Type A meeting request to elicit the Agency’s feedback on the adequacy of the stability data supporting the use of the existing excipient as a co-diluent for PRS-343 and the clinical proposal to initiate continued development of PRS-343. We believe that we have generated a robust dataset

which will allow FDA to lift the hold upon consideration of our forthcoming Complete Response Letter, which we expect to submit in December, pending a positive Type A meeting. As a result of this decision to formally engage FDA via a Type A meeting, we now expect to initiate the phase 12 study of PRS-343 in combination with ~~atezolizumab~~ramucirumab and ~~intend~~paclitaxel in the second line of treatment of HER2-positive gastric cancer next year.

In August 2020, we entered into a Clinical Trial Collaboration and Supply Agreement, or the Lilly Agreement, with Eli Lilly and Company, or Lilly, pursuant to ~~report initial data from~~which we and Lilly will collaborate in a phase 2 clinical study to determine the ~~study at~~safety and efficacy of our ~~R&D day on November 19, 2019~~PRS-343 in ~~New York.~~combination with the standard of care regimen for advanced or metastatic gastric cancer in the second line, ramucirumab (Cyramza®) and paclitaxel, for the second-line treatment of HER2+ gastric cancer.

•For our ~~other~~additional IO drug candidates, ~~and programs,~~ we are conducting activities relating to candidate identification, optimization and preclinical evaluation.

◦We anticipate filing an IND application for PRS-344, a 4-1BB/PD-L1 bispecific in 2021 and are currently completing CMC activities associated with the scale-up manufacture of the drug-product, while preparing for an IND submission to FDA. We hold exclusive commercialization rights for PRS-344 in the United States and will receive royalties on ex-U.S. sales from Servier for this program.

◦We intend to complete non-GLP preclinical work for PRS-352 this year before handing the program over to Servier, who would be fully responsible for further development. PRS-352 is a preclinical-stage program within the Servier alliance addressing undisclosed targets for immuno-oncology.

◦We achieved ~~two~~a key preclinical ~~milestones in connection with~~milestone for one of the ~~PRS-344 program, one in December 2018 and another in February 2019, triggering two milestone payments from Servier, and intend to file an IND for the drug candidate~~programs in the ~~first half of 2020.~~Seagen collaboration, a bispecific tumor-targeted costimulatory agonist, triggering a $5 million milestone. We ~~also executed our option~~have handed the program over to ~~opt-into co-development~~Seagen, which is responsible for further advancement and United States commercialization of PRS-344 during the first quarter of 2019. In September 2019, Servier notified us of its decision to discontinue co-development of PRS-332, a PD-1-LAG-3 bispecific that served as the initial development program under the Pieris-Servier alliance, for strategic reasons. We do not presently intend to continue development of PRS-332 but retain full rights to advance the development and commercializationfunding of the ~~product on a world-wide basis. Servier’s termination~~asset. The program is one of up to three potential programs in the ~~co-development of the PRS-332 program does not impact the remainder of the Pieris-Servier~~Seagen alliance, and we believe the ~~parties continue to advance PRS-344 through IND-enabling activities. The Pieris-Servier alliance includes three additional programs beyond PRS-344, all of which are~~achieved milestone further validates our approach and leadership in ~~active preclinical development.~~

~~We completed dosing for~~immuno-oncology bispecifics, complementing the ~~phase 2a study of PRS-080 in anemic, hemodialysis-dependent CKD patients in 2018 and~~encouraging clinical data from that study was presented at the 24th European Hematology Association Congress in June 2019 showing that: (i) PRS-080 was safe and well tolerated at both 4 mg/kg and 8 mg/kg treatment dose levels; (ii) no treatment-related adverse events (AEs) or serious adverse events (SAEs) were observed in the study; (iii) PRS-080 therapy yielded robust iron mobilizationseen with increases in both serum iron and TSAT; (iv) peak iron concentrations were higher in the 8 mg/kg treatment group; and (v) while there was no clear difference in hemoglobin (Hb) values between placebo and PRS-080 in 4 mg/kg treatment group over the course of treatment, preliminary evidence of Hb response with separation of Hb values between placebo and PRS-080 was shown in the 8 mg/kg treatment group during the treatment period. We plan to share final data from the phase 2a study with ASKA in the fourth quarter of 2019, at which point ASKA will decide whether to exercise its option to develop and commercialize PRS-080 in Japan and other Asian territories. Additionally, we plan to share the dataset with other parties for potential partnerships outside of the ASKA territories.

Our core Anticalin technology and platform were developed in Germany and we have collaborations with major multi-national pharmaceutical companies. In particular, we have an alliance with AstraZeneca to treat respiratory diseases and partnerships with Servier and Seattle Genetics, both in IO.PRS-343.

Since inception, we have devoted nearly all of our efforts and resources to our research and development activities and have incurred significant net losses. For the three and nine months ended September 30, 2020, we reported a net loss of $14.3 million and $22.8 million, respectively. For the three and nine months ended September 30, 2019, we reported a net loss of $2.6 million and $24.7 million, respectively. ~~For the three and nine months ended September 30, 2018, we reported a net loss of $6.2 million and $15.1 million, respectively.~~ As of September 30, ~~2019,~~2020, we had an accumulated deficit of ~~$173.4~~$197.0 million. We expect to continue incurring substantial losses for the next several years as we continue to develop our clinical and preclinical drug candidates and programs. Our operating expenses are comprised of research and development expenses and general and administrative expenses.

We have not generated any revenues from product sales to date and we do not expect to generate revenues from product sales for the foreseeable future. Our revenues for the three and nine months ended September 30, ~~2019~~2020 and ~~2018~~2019 were from license and collaboration agreements with our partners.

A significant portion of our operations are conducted in countries other than the United States. Since we conduct our business in U.S. dollars, our main exposure, if any, results from changes in the exchange rates between the euro and the U.S. dollar. At each period end, we remeasure assets and liabilities to the functional currency of that entity (for example, U.S. dollar payables recorded by Pieris Pharmaceuticals GmbH). Remeasurement gains and losses are recorded in the statement of operations line item ~~"Other~~‘Other income (expense), ~~net".~~net.’ All assets and liabilities denominated in euros are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenues and expenses are translated at the weighted average rate during the period. Equity transactions are translated using historical exchange rates. All adjustments resulting from translating foreign currency financial statements into U.S. dollars are included in accumulated other comprehensive loss.

Key Financial Terms and Metrics

The following discussion summarizes the key factors our management believes are necessary for an understanding of our consolidated financial statements.

Revenues

We have not generated any revenues from product sales to date and we do not expect to generate revenues from product sales for the foreseeable future. Our revenues for the last two years have been primarily from the license and collaboration agreements with AstraZeneca, Servier and ~~Seattle Genetics.~~Seagen.

The revenues from AstraZeneca, Servier and ~~Seattle Genetics~~Seagen have been comprised primarily of upfront payments, research and development services and milestone payments. For additional information about our revenue recognition policy, see “Note ~~2—Summary~~2-Summary of Significant Accounting Policies”.

Research and Development Expenses

The process of researching and developing drugs for human use is lengthy, unpredictable and subject to many risks. We expect to continue incurring substantial expenses for the next several years as we continue to develop our clinical and preclinical drug candidates and programs. We are unable, with any certainty, to estimate either the costs or the timelines in which those expenses will be incurred. Our current development plans focus on the following ~~activities: Our~~programs: our lead respiratory program, ~~PRS-060~~PRS-060/AZD1402 and our other respiratory programs, our IO programs, currently comprised of PRS-343 as well as multiple additional proprietary and partnered programs, including PRS-344. These programs consume a large proportion of our current, as well as projected, resources.

Our research and development costs include costs that are directly attributable to the creation of certain of our Anticalin drug candidates and are comprised of:

•internal recurring costs, such as personnel-related costs (salaries, employee benefits, equity compensation and other costs), materials and supplies, facilities and maintenance ~~costs;~~costs attributable to research and development functions; and

•fees paid to external parties who provide us with contract services, such as preclinical testing, manufacturing and related testing and clinical trial activities.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries, employee benefits, equity compensation and other personnel-related costs associated with executive, administrative and other support staff. Other significant general and administrative expenses include the costs associated with professional fees for accounting, auditing, insurance costs, consulting and legal ~~services.~~services along with facility and maintenance costs attributable to general and administrative functions.

Results of Operations

Comparison of the three and nine months ended September 30, ~~2019~~2020 and ~~2018~~2019

The following table sets forth our revenues and operating expenses ~~for the three and nine months ended September 30, 2019 and 2018~~ (in thousands):


	Three Months Ended September 30						Nine Months Ended September 30							Three Months Ended September 30,				Nine Months Ended September 30,
	2019			2018			2019			2018				2020		2019		2020		2019
Revenues	$	15,132		$	8,345		$	29,009		$	24,187		Revenues	$	2,939	$	15,132	$	27,446	$	29,009

Research and development expenses	13,211			11,401			40,880			28,492			Research and development expenses	11,822		13,211		35,913		40,880
General and administrative expenses	4,835			4,748			13,956			13,878			General and administrative expenses	4,116		4,835		13,043		13,956
Total operating expenses	18,046			16,149			54,836			42,370			Total operating expenses	15,938		18,046		48,956		54,836
Other (expense) income													Other (expense) income
Interest income													Interest income	55		377		503		1,332
Other (expense) income, net													Other (expense) income, net	(1,339)		(55)		(1,823)		(203)

Interest income	377			504			1,332			1,491
Other income (expense), net	(55		)	1,147			(203		)	1,472
Loss before income taxes	(2,592		)	(6,153		)	(24,698		)	(15,220		)
Provision for income tax	—			—			—			(148		)

Net loss	$	(2,592	)	$	(6,153	)	$	(24,698	)	$	(15,072	)	Net loss	$	(14,283)	$	(2,592)	$	(22,830)	$	(24,698)

Revenues

The following table provides a comparison of revenues ~~for the three months ended September 30, 2019 and 2018~~ (in thousands):


	Three Months Ended September 30,
	2020		2019		Increase/(Decrease)
Customer revenue	$	2,578	$	3,589	$	(1,011)
Collaboration revenue	361		11,543		(11,182)

Total Revenue	$	2,939	$	15,132	(12,193)

Three Months Ended September 30
2019 2018 Increase/(Decrease)
Revenue from contracts with customers $ 14,498
$ 7,873
$ 6,625
Collaboration revenue (ASC 808) 634
472
162
Total Revenue $ 15,132
$ 8,345
$ 6,787

•The ~~$6.6~~$1.0 million ~~increase~~decrease in customer revenue ~~from contracts with customers~~ in the three months ended September 30, ~~2019~~2020 compared to the three months ended September 30, ~~2018~~2019 relates to overall lower levels of activities with AstraZeneca, Seagen and Servier.

•The $11.2 million decrease in collaboration revenues in the three months ended September 30, 2020 compared to the three months ended September 30, 2019 relates to higher amounts of Servier revenue recorded upon the termination of the co-development of PRS-332 by Servier for strategic ~~reasons.~~reasons in the prior year, as well as lower amounts of Servier cost-sharing revenue due to the timing of manufacturing costs incurred in the current year.

The following table provides a comparison of revenues (in thousands):


	Nine Months Ended September 30,
	2020		2019		Increase/(Decrease)
Customer revenue	$	22,393	$	15,538	$	6,855
Collaboration revenue	5,053		13,471		(8,418)

Total Revenue	$	27,446	$	29,009	(1,563)

•The $6.9 million increase in customer revenue for the nine months ended September 30, 2020 compared to the nine months ended September 30, 2019 relates to higher Seagen revenue recorded upon the execution of a contractual amendment (approximately $3.5 million) in the current period, as well as the achievement of a $5.0 million milestone on that first program. This increase was partially offset by lower levels of activities with respect to our collaboration ~~agreements~~agreement with ~~both Seattle Genetics and AstraZeneca .~~AstraZeneca.

•The ~~following table provides a comparison of~~$8.4 million decrease in collaboration revenues ~~for the nine months ended September 30, 2019 and 2018 (in thousands):~~

Nine Months Ended September 30
2019 2018 Increase/(Decrease)
Revenue from contract with customers $ 26,966
$ 22,541
$ 4,425
Collaboration revenue (ASC 808) 2,043
1,555
488
Other —
91
(91 )
Total Revenue $ 29,009
$ 24,187
$ 4,822

~~The $4.4 million increase in revenues from license fees~~ in the nine months ended September 30, ~~2019~~2020 compared to the nine months ended September 30, ~~2018 primarily~~2019 relates to higher amounts of Servier revenue recorded upon the termination of the co-development of PRS-332 by Servier for strategic reasons ~~partially offset~~in the prior year compared to revenue recorded upon the termination of a preclinical program by Servier for strategic reasons in the current year. In addition, lower ~~activity levels~~amounts of cost-sharing revenue were recorded in the current year due to the timing of manufacturing costs incurred with respect to our collaboration agreement with ~~Seattle Genetics and AstraZeneca.~~

The $0.5 million increase in collaboration revenues in the nine months ended September 30, 2019 compared to the nine months ended September 30, 2018 relates to increased research and development activities under our collaboration with Servier.

Research and Development Expenses

The following table provides a comparison of the research and development expenses (in thousands):


	Three Months Ended September 30,
	2020		2019		Increase/(Decrease)
Respiratory	$	2,359	$	3,241	$	(882)
Immuno-oncology	3,473		4,102		(629)

Other R&D activities	5,990		5,868		122
Total	$	11,822	$	13,211	(1,389)

•The $0.9 million decrease in our respiratory programs is due to lower clinical costs and manufacturing costs with respect to activities for PRS-060 offset slightly by investment in other proprietary respiratory programs in the ~~three months ended September 30, 2019~~current year.

•The $0.6 million decrease in our immuno-oncology programs period-over-period is due primarily to lower investment across partnered and ~~2018~~proprietary programs due to prioritization efforts which were partially offset by higher PRS-343 translational costs as we develop biomarker testing capabilities.

•The $0.1 million increase in other research and development activities expenses is mainly due to higher license fees and higher allocated IT and facility costs due to the move to a new R&D facility in Hallbergmoos, Germany in the first quarter of 2020. These increases were partially offset by lower overall travel costs related to COVID-19 restrictions.

The following table provides a comparison of the research and development expenses (in thousands):


	Three Months Ended September 30								Nine Months Ended September 30,
	2019		2018		Increase/(Decrease)				2020		2019		Increase/(Decrease)
Respiratory	$	3,241	$	2,371	$	870		Respiratory	$	7,784	$	9,168	$	(1,384)
Immuno-oncology	4,102		4,225		(123		)	Immuno-oncology	9,494		13,950		(4,456)
Anemia	80		288		(208		)

Other R&D activities	5,788		4,517		1,271			Other R&D activities	18,635		17,762		873
Total	$	13,211	$	11,401	$	1,810		Total	$	35,913	$	40,880	(4,967)

•The ~~$0.9~~$1.4 million ~~increase~~decrease for our respiratory programs period-over-period is due primarily to ~~our ongoing GMP~~a decrease in manufacturing and clinical costs with respect to activities for ~~phase 2a readiness for~~ PRS-060. ~~We also incurred higher pre-clinical and lab supply expenses as we continue investing in our other proprietary and partnered programs in 2019 compared to 2018;~~

•The ~~$0.1~~$4.5 million decrease in our immuno-oncology ~~program spending~~programs period-over-period is due primarily to ~~a slightly~~ lower ~~spending on our~~manufacturing and preclinical ~~IO programs on a period-over-period basis;~~

~~The $0.2 million decrease~~costs for our ~~anemia~~PRS-344 program ~~PRS-080, period-over-period is mainly due to lower clinical costs~~ as the ~~phase 2a study was largely completed earlier~~manufacturing costs were initiated and ramped up in ~~2019;~~the first half of 2019, lower preclinical costs on other Servier programs, and decreases in manufacturing costs across other proprietary immuno-oncology programs.

•The ~~$1.3~~$0.9 million increase in other research and development activities expenses is mainly due to higher personnel expenses, including bonus and stock compensation, ~~due to an overall increase in headcount,~~higher allocated IT and ~~an increase in allocated~~ facility costs due to the move to a new R&D facility in Hallbergmoos, Germany in the first quarter of 2020, and higher ~~non-cash rent charges for the new Hallbergmoos facility that is being prepared for occupancy.~~

~~The following table provides a comparison of the research and development expenses for the nine months ended September 30, 2019 and 2018 (in thousands):~~

Nine Months Ended September 30
2019 2018 Increase/(Decrease)
Respiratory $ 9,168
$ 5,672
$ 3,496
Immuno-oncology 13,950
8,789
5,161
Anemia 302
1,592
(1,290 )
Other R&D activities 17,460
12,439
5,021
Total $ 40,880
$ 28,492
$ 12,388

~~The $3.5 million increase for our respiratory programs period-over-period is due primarily to~~license fees. These increases ~~to our ongoing CMC costs incurred for phase 2a readiness for PRS-060~~were slightly offset by ~~slightly~~ lower clinical and preclinical costs ~~as the phase 1 SAD study was completed earlier in 2019. We also incurred higher pre-clinical~~related to non-core programs and ~~lab supply expenses as we initiated~~lower overall travel costs related to COVID-19 restrictions and ~~were working on more proprietary and partnered respiratory programs in 2019 compared to 2018;~~

The $5.2 million increase in our immuno-oncology program spending period-over-period is due primarily to an increase in clinical trials costs incurred for PRS-343 and drug product manufacturing for PRS-343, PRS-344 and other proprietary programs;

~~The $1.3 million decrease for our anemia program, PRS-080, period-over-period is mainly due to~~ lower ~~clinical costs as the phase 2a study wound down in 2019 compared to the same period in 2018; and~~

The $5.0 million increase in other research and development activities expenses is mainly due to higher personnel expenses, including bonus and stock compensation, due to an overall increase in headcount, an increase in recruiting costs, and an increase in allocated facility costs due to higher non-cash rent charges for the new Hallbergmoos facility that is being prepared for occupancy.professional services.

General and Administrative Expenses

General and administrative expenses ofwere $4.1 million for the three months ended September 30, 2020 and $4.8 million for the three months ended September 30, ~~2019 were generally consistent~~2019. The period over period decrease is due to ~~$4.7 million for~~lower personnel expenses, including bonus and stock compensation, lower audit and professional services from Sarbanes-Oxley readiness procedures in the ~~three months ended September 30, 2018 across all expense categories.~~prior year, and lower overall travel costs related to COVID-19 restrictions. This was offset slightly by higher allocated IT and facility costs due to the move to a new R&D facility.

General and administrative expenses were $13.0 million for the nine months ended September 30, 2020 and $14.0 million for the nine months ended September 30, ~~2019~~2019. The period over period decrease is due to lower personnel expenses, including bonus and ~~$13.9~~stock compensation, lower professional services, and lower overall travel costs related to COVID-19 restrictions. These were slightly offset by higher legal costs and higher allocated IT and facility costs due to the move to a new R&D facility.

Other Income (Expense)

Our other income (expense) was $(1.3) million for the ~~nine~~three months ended September 30, ~~2018. The period over period fluctuation is due to decreases in legal, professional~~2020 and ~~recruiting costs, offset completely by increase in audit and tax, stock compensation and costs related to the new Hallbergmoos facility, including non-cash deferred rent charges.~~

~~Non-operating income (expense), net~~

~~Our non-operating income was~~ $0.3 million for the three months ended September 30, ~~2019 as compared~~2019. This was due to ~~$1.7 million for~~ the ~~three months ended September 30, 2018. This decrease is due to~~impact of lower interest income ~~as a result of~~(both lower invested amounts and lower interest rates in the current quarter) and a ~~strengthening of the~~weakening U.S. dollar against the euro ~~including~~in the ~~impact on foreign currency remeasurement of monetary assets, primarily U.S. dollar cash and investment balances in Germany.~~current quarter versus the prior year quarter.

Our ~~non-operating~~other income (expense) was $(1.3) million for the nine months ended September 30, 2020 and $1.1 million for the nine months ended September 30, ~~2019 as compared to $3.0 million for the nine months ended September 30, 2018.~~2019. This ~~decrease is due mostly to a higher foreign currency remeasurement gain~~was due to the impact of lower interest income (both lower invested amounts and lower interest rates in the current quarter) and a ~~larger receivable balance~~weakening U.S. dollar against the euro in the current year versus the prior year.

Liquidity and Capital Resources

Through September 30, ~~2019,~~2020, we have funded our operations primarily through private and public sales of equity, payments received under our license and collaboration agreements (including research and development services costs, upfront and milestone payments), government grants and loans.

As of September 30, ~~2019,~~2020, we had a total of ~~$86.2~~$82.6 million in cash, cash equivalents and investments. We have incurred losses in every period since inception including the three months ended September 30, ~~2019~~2020 and ~~2018,~~2019, respectively, and have a total accumulated deficit of ~~$173.4~~$197.0 million as of September 30, ~~2019.~~

2020.

We have several research and development programs underway in varying stages of development, and we expect they will continue to require increasing amounts of cash for development, conducting clinical trials and testing and manufacturing of product material. We expect cash necessary to fund operations will increase significantly over the next several years as we

continue to conduct these activities necessary to pursue governmental regulatory approval of clinical-stage programs and our other product candidates.

The following table provides a summary of operating, investing and financing cash flows (in thousands):


	Nine Months Ended September 30,
	2020		2019
Net cash used in operating activities	$	(32,479)	$	(38,493)
Net cash provided by investing activities	24,361		11,719
Net cash provided by financing activities	10,040		501

Net cash used in operating activities for the nine months ended September 30, 2020 and 2019 ~~and 2018 respectively (in thousands):~~

Nine Months Ended September 30
2019 2018
Net cash (used in) provided by operating activities (38,493 ) 7,992
Net cash provided by (used in) investing activities 11,719
(3,658 )
Net cash provided by financing activities 501
48,504

~~There~~ was ~~a $46.5~~$32.5 million ~~change in net cash from operating activities, as the net cash used in operating activities was~~and $38.5 million, ~~for the nine months ended September 30, 2019 compared to net cash provided by operating activities of $8.0 million for the nine months ended September 30, 2018.~~respectively. The change is primarily driven a $1.9 million decrease in the net loss in 2020 compared to the same period in 2019 and a decrease in accounts payable and accrued expenses due to higher accruals at year-end 2019 related to the new facility, offset by lower accounts receivable and lower deferred revenue mainly driven by the recognition of remaining revenue related to PRS-332, offset slightly by other working capital changes during the nine months ended September 30, 2019. Additionally, there was a $9.6 million increase in the net loss in 2019 compared to 2018.prepaid expenses.

The change in net cash provided by investing activities for the nine months ended September 30, ~~2019~~2020 compared to ~~net cash used in~~ the same period in ~~2018~~2019 is mainly attributable to ~~more investment~~lower net investments changes (lower purchases ~~than investment~~and increased maturities resulting in an overall decrease in investments) in the current year compared to ~~2018.~~2019 along with an increase in purchases of property and equipment related to our move to a new R&D facility.

Financing activities for the nine months ended September 30, 2020 and 2019 were $10.0 million and $0.5 million, ~~due to exercises of options and warrants and~~respectively. The change is primarily driven by proceeds from ~~the employee stock purchase plan. This is compared~~a strategic sale on our ATM Program to ~~$47.2 million in proceeds due to the issuance of common stock under~~strenghten our ~~2018 Offering along with $1.3 million of proceeds from the exercise of warrants and stock options for the nine months ended September 30, 2018.~~shareholder base.

OnIn August 9, 2019, we entered into ~~an Open Market Sale Agreement, or the Sale Agreement with Jefferies LLC, or Jefferies,~~a sale agreement pursuant to which we may offer and sell shares of ~~our~~its common stock, ~~par value $0.001 per share, having~~from time to time, up to an aggregate gross sales proceeds of $50.0 million ~~or the Shares, from time to time,~~ through an “at the market offering” program, or the ATM Program, under ~~our~~a shelf registration statement on Form S-3 (File No. 333-226725). ~~To date,~~Through September 30, 2020, we ~~have not~~ sold ~~any Shares~~$10.0 million of common shares under the ~~Sales Agreement.~~ATM Program.

In November 2019, we entered into a securities purchase agreement for a private placement with a select group of institutional investors. ~~William Blair & Company, L.L.C. acted as sole placement agent in connection with the private placement.~~ The private placement, referred to as the PIPE, consisted of 9,014,960 units, at a price of $3.55 per unit, for gross proceeds of approximately $32.0 million, and net proceeds to ~~the Company~~us of approximately ~~$31.1~~$31.0 million, after deducting placement agent fees and estimated offering expenses payable by ~~the Company.~~us. Each unit consists of (i) one share of ~~the Company’s~~our common stock or 0.001 shares of non-voting Series C convertible preferred stock, and (ii) one immediately-exercisable warrant to purchase one share of ~~the Company’s~~our common stock with an exercise price of $7.10.

We expect that our existing cash, cash equivalents and investments will enable us to fund our operational and capital expenditure requirements for at least twelve months from the issuance date of these financial statements. Any requirements for additional capital will depend on many factors, including the following:

•the scope, rate of progress, results and cost of our clinical studies, preclinical testing and other related activities;

•the cost of manufacturing clinical supplies, and establishing commercial supplies, of our drug candidates and any products that we may develop;

•the number and characteristics of drug candidates that we pursue;

•the cost, timing and outcomes of regulatory approvals;

•the cost and timing of establishing sales, marketing and distribution capabilities;

•the terms and timing of any collaborative, licensing and other arrangements that we may establish;

•the timing, receipt and amount of sales, profit sharing or royalties, if any, from our potential products;

•the cost of preparing, filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights; ~~and~~

•the extent to which we acquire or invest in businesses, products or technologies, although we currently have no commitments or agreements relating to any of these types of ~~transactions.~~transactions; and

•the effects of the COVID-19 pandemic and the cost and timing of actions taken to contain it.

Due to the often-volatile nature of the financial markets, equity and debt financing(s) may be difficult to obtain. In addition, any unfavorable development or delay in the progress of our core clinical-stage programs including ~~PRS-060~~PRS-343 and ~~PRS-343~~PRS-060/AZD1402 could have a material adverse impact on our ability to raise additional capital.

We may seek to raise any necessary additional capital through a combination of private or public equity offerings, debt financings, collaborations, strategic alliances, licensing arrangements and other marketing and distribution arrangements. To the extent that we raise additional capital through marketing and distribution arrangements or other collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our drug candidates, future revenue streams, research programs or product candidates or to grant licenses on terms that may not be favorable to us. If we raise additional capital through private or public equity offerings, the ownership interest of our existing stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect our stockholders’ rights. If we raise additional capital through debt financing, we may be subject to covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements, as defined under applicable SEC rules.

Critical Accounting Policies and Estimates

Refer to Part II, Item 7, "Critical Accounting Policies and Estimates" of our Annual Report on Form 10-K for the fiscal year ended on December 31, ~~2018~~2019 for a discussion of our critical accounting policies and estimates. There ~~has~~have been ~~one~~two material ~~change~~changes to the critical accounting policies during the nine months ended September 30, ~~2019. This change is related~~2020. These changes relate to revenue recognition and isproperty and equipment and are described in “Note 2—Summary of Significant Accounting ~~Policies”~~Policies".

This discussion and analysis of our financial condition and results of operations is based on our financial statements, which we have prepared in accordance with U.S. generally accepted accounting principles. We believe that several accounting policies are important to understanding our historical and future performance. We refer to these policies as critical because these specific areas generally require us to make judgments and estimates about matters that are uncertain at the time we make the estimate, and different estimates—which also would have been reasonable—could have been used. On an ongoing basis, we evaluate our estimates and judgments, including those described in greater detail below. We base our estimates on historical experience and other market-specific or other relevant assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

We believe that our most critical accounting policies are those relating to revenue recognition, contingencies, research and development expense and income taxes, and there have been significant changes to our revenue recognition, multiple-element and milestone accounting policies discussed in the Annual Report on Form 10-K for the fiscal year ended on December 31, ~~2018.~~2019. Please refer to “Note 2—Summary of Significant Accounting Policies” for the updated revenue recognition policy that encompasses the changes to the historical revenue recognition, multiple-element and milestone accounting policies.

Recently Issued Accounting Pronouncements

We review new accounting standards to determine the expected financial impact, if any, that the adoption of each standard will have. For the recently issued accounting standards that we believe may have an impact on our consolidated financial statements, see “Note 2—Summary of Significant Accounting Policies” in our consolidated financial statements.

~~Emerging Growth Company and~~ Smaller Reporting Company Status

The Jumpstart Our Business Startups Act of 2012 establishes a class of company called an “emerging growth company,” which generally is a company whose initial public offering was completed after December 8, 2011 and had total annual gross

revenues of less than $1.07 billion during its most recently completed fiscal year. Additionally, Section 12b-2 of the Exchange Act establishes a class of company called a “smaller reporting company” which, effective September 10, 2018, was amended to include companies with a public float of less than $250 million as of the last business day of its most recently completed second fiscal quarter or, if such public float is less than $700 million, had annual revenues of less than $100 million during the most recently completed fiscal year for which audited financial statements are available. Currently, we qualify as ~~both an emerging growth company and~~ a smaller reporting company.

As ~~an emerging growth company and~~ a smaller reporting company, we are eligible for, and have taken advantage of certain exemptions from various reporting requirements that are not available to public reporting companies that do not qualify for ~~those classifications,~~this classification, including, but not limited ~~to, the following:~~to:

Any requirement that may be adopted by the Public Company Accounting Oversight Board regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and financial statements, commonly known as an “auditor discussion and analysis.”

~~A requirement to hold a non-binding advisory stockholder vote on executive compensation or any golden parachute payments not previously approved by stockholders.~~

A requirement to comply with the requirement of auditor attestation of management’s assessment of internal control over financial reporting, which is required for other public reporting companies by Section 404 of the Sarbanes-Oxley Act of 2002, as amended.

•An opportunity for reduced disclosure obligations regarding executive compensation in its periodic and annual reports, including without limitation exemption from the requirement to provide a compensation discussion and analysis describing compensation practices and procedures.

•An opportunity for reduced financial statement disclosure in registration statements, which must include two years of audited financial statements rather than the three years of audited financial statements that are required for other public reporting companies.

~~Emerging growth companies may elect~~

•An opportunity for reduced audit and other compliance expenses as we are not subject to ~~take advantage~~the requirement to obtain an auditor’s report on internal control over financial reporting under Section 404(b) of the ~~extended transition period provided in Section 7(a)(2)(B)~~Sarbanes-Oxley Act of 2002.

•An opportunity to utilize the ~~Securities Act~~non-accelerated filer time-line requirements beginning with our annual report for ~~complying with new or revised accounting standards. This allows an emerging growth company to delay~~ the adoption of certain accounting standards until those standards would otherwise apply to private companies. We have elected to take advantage of the benefits of this extended transition period. Our financial statements may therefore not be comparable to those of companies that comply with such new or revised accounting standards.

year ending December 31, 2020 and quarterly filings thereafter.

For as long as we continue to be ~~an emerging growth company and/or~~ a smaller reporting company, we expect that we will take advantage of both the reduced internal control audit requirements and the disclosure obligations available to us as a result of ~~those respective classifications. We expect that we will no longer qualify as an emerging growth company on December 31, 2019 as~~ this ~~is the last day of the fiscal year following the fifth anniversary of the date of the first sale of our common stock pursuant to an effective registration statement under the Securities Act.~~classification.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are a smaller reporting company as defined by Rule 12b-2 of the Exchange Act and are not required to provide the information required under this item.

Item 4. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and principal financial officer, have evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form 10-Q. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms, and such information is accumulated and communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Our principal executive officer and principal financial officer have

concluded that, based on such evaluation, our disclosure controls and procedures were ~~not~~ effective as of September 30, ~~2019 as a result~~2020.

Remediation of ~~the previously reported material weakness discussed below.~~Material Weakness

A material weakness is a deficiency, or a combination of deficiencies, in internal controls over financial reporting, such that there is a reasonable possibility that a material misstatement of a company’s annual or interim consolidated financial statements would not be prevented or detected on a timely basis.

InAs previously disclosed, in connection with the preparation of our financial statements for the year ended December 31, ~~2018,~~2019, we concluded that we had a material weakness ~~relating~~in internal controls over our information technology general controls related to change and access management processes, and that as a result, internal controls related to substantially all underlying financial statement accounts and disclosures were ineffective. We also identified deficiencies in internal controls over our ~~income tax provision process, including~~quarterly revenue recognition procedures in that they were not operating effectively for a sufficient period of time in 2019 and certain controls related to the ~~evaluation~~implementation of ~~any changes resulting~~ASU No. 2014-09, Revenue from ~~the recently enacted Tax Cuts and Jobs Act,~~Contracts with Customers (Topic 606), or ~~the TCJA. The~~ASC 606, which, taken together, led us to determine that we had a material weakness created a reasonable possibility that a material misstatement of our annual or interim consolidated financial statements may not be prevented or detected on a timely basis. The material weakness did not result in any misstatement or correction in the ~~provision for income taxes prior to~~revenue recognition process. To remediate the ~~issuance of~~material weaknesses identified, we performed the ~~2018 consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018.~~following actions during 2020:

~~Management has undertaken a remediation plan to address the control deficiency that led~~•With respect to the material ~~weakness. The remediation plan includes enhancing~~weakness in ITGC's, we have reevaluated our ~~tax provision process, including~~risk assessment and IT control environment within the ~~ongoing impact from~~finance department, developed an IT policy with a clear description on how the ~~TCJA. We may also retain additional expert assistance, as needed,~~controls are designed to operate, and established more rigorous controls over system access, administration, and system changes.

•With respect to the material weakness in the ~~preparation~~ revenue recognition controls, we have implemented improved policiesand ~~review~~enhanced the rigor of our ~~tax provision.~~review documentation with regards to internal controls over our revenue recognition process.

~~Notwithstanding this~~

As the enhanced policies, procedures and controls have functioned effectively for multiple quarters, we concluded that we have remediated the material ~~weakness, management,~~weaknesses previously disclosed from 2019.

Management, including our principal executive officer and principal financial officer, has concluded that the financial statements and other financial information included in this Quarterly Report on Form 10-Q fairly present in all material respects our financial condition, results of operations and cash flows as of, and for, the periods presented.

Changes in Internal Control over Financial Reporting

~~There~~Except for changes in connection with our implementation of the remediation process described above, there have been no changes in our internal control over financial reporting identified in connection with the evaluation of such internal control required by Rules 13a-15(d) and 15d-15(d) under the Exchange Act that occurred during the quarter ended September 30, ~~2019~~2020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting other than the remediation efforts described above.

PART II - OTHER INFORMATION

Item 1. Legal Proceedings.

As of the date of this Quarterly Report on Form 10-Q, we are not party to and our property is not subject to any material pending legal proceedings. However, from time to time, we may become involved in legal proceedings or subject to claims that arise in the ordinary course of our business activities. Regardless of the outcome, such legal proceedings or claims could have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Item 1A. Risk Factors.

~~There have been no material changes from~~Please refer to the ~~risk factors previously disclosed in Part I,~~complete Item 1A ~~(Risk Factors)~~ of ~~our~~the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, ~~2018~~.2019, filed with the SEC on March 13, 2020, and to Item 1A of the Company's Quarterly Report on Form 10-Q, for the fiscal quarter ended March 31, 2020 and June 30, 2020, filed with the SEC on May 11, 2020 and August 11, 2020, respectively, for risks and uncertainties facing the Company that may have a material adverse effect on the Company’s business prospects, financial condition and results of operations.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

None.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

None.

Item 6. Exhibits.

Exhibit

Number

Exhibit Description

Incorporated by

Reference herein

from Form or

Schedule

Filing Date

SEC File /

Registration

Number

~~3.1~~10.1

~~Certificate of Designation of Series C Convertible Preferred Stock.~~

~~3.2~~

~~Amended~~Clinical Trial Collaboration and ~~Restated Bylaws of the Registrant, as amended.~~

~~4.1~~

~~Form of Warrant to purchase Common Stock.~~

~~Form 8-K (Exhibit 10.2)~~

~~November 4, 2019~~

~~001-37471~~

~~10.1~~

~~Open Market Sale~~Supply Agreement, dated ~~as of~~ August ~~9, 2019,~~10, 2020, by and between Pieris Pharmaceuticals, Inc. and ~~Jefferies LLC.~~Eli Lilly and Company.

~~Form 10-Q (Exhibit 10.1)~~

~~August 9, 2018~~

~~001-37471~~

~~10.2~~

~~Managing Director Services Agreement by and between Pieris Pharmaceuticals GmbH and Hitto Kaufmann, PhD., dated February 20, 2019.~~

~~10.3~~

~~Non-Qualified Stock Option Agreement by and between the Registrant and Hitto Kaufmann, Ph.D., dated as of August 30, 2019.~~

~~10.4~~

~~Securities Purchase Agreement, dated November 2, 2019, by and among the Company and the Investors named therein.~~

~~Form 8-K (Exhibit 10.1)~~

~~November 4, 2019~~

~~001-37471~~

~~Exhibit~~

~~Number~~31.1

~~Exhibit Description~~

~~Incorporated by~~

~~Reference herein~~

~~from Form or~~

~~Schedule~~

~~Filing Date~~

~~SEC File /~~

~~Registration~~

~~Number~~

~~10.5~~

~~Registration Rights Agreement, dated November 2, 2019, by and among the Company and the Investors named therein.~~

~~Form 8-K (Exhibit 10.3)~~

~~November 4, 2019~~

~~001-37471~~

~~31.1~~

Certification of Principal Executive Officer Pursuant to Rules 12a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2

Certification of Principal Financial Officer and Principal Accounting Officer Pursuant to Rules 12a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1

Certification of Principal 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 Principal Financial Officer and Principal Accounting 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 Label Linkbase Document

101.PRE

Inline XBRL Taxonomy Extension Presentation Linkbase Document

*104

~~Filed herewith.~~

Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

Filed herewith.

The certifications furnished in Exhibit 32.1 and Exhibit 32.2 hereto are deemed to accompany this Quarterly Report and will not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, except to the extent that the registrant specifically incorporates it by reference.

Confidential treatment received as to portions of the exhibit. Confidential materials omitted and filed separately with the SEC.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Quarterly Report on Form 10-Q to be signed on its behalf by the undersigned thereunto duly authorized.


		PIERIS PHARMACEUTICALS, INC.

November 4, 2020		~~PIERIS PHARMACEUTICALS, INC.~~
By:
~~November 12, 2019~~	~~By:~~	/s/ Stephen S. Yoder
			Stephen S. Yoder
			Chief Executive Officer and President
			(Principal Executive Officer)

November ~~12, 2019~~4, 2020		By:	/s/ Thomas Bures
			Thomas Bures
			Vice President, Finance and Treasurer
			(Principal Financial Officer and Principal Accounting Officer)



	As Reported, December 31, 2018			ASC 606 Adjustment			Adjusted, January 1, 2019
Consolidated Balance Sheet Data (in thousands):
Prepaid expenses and other current assets	$	4,574		$	716		$	5,290
Other non-current assets	910			1,120			2,030
Total Assets	$	141,341		$	1,836		$	143,177
Deferred revenue, net of current portion	$	53,303		$	3,477		$	56,780
Total Liabilities	101,406			3,477			104,883
Accumulated deficit	(147,066		)	(1,641		)	(148,707		)
Total stockholders' equity	39,935			(1,641		)	38,294
Total liabilities and stockholders' equity	$	141,341		$	1,836		$	143,177



	September 30, 2019
	As Reported, ASC 606			Adjustments			Adjusted Balance, ASC 605
Condensed Consolidated Balance Sheet Data (in thousands):
Prepaids and other current assets	$	4,778		$	(646	)	$	4,132
Other non-current assets	7,770			(808		)	6,962
Total Assets	$	116,751		$	(1,454	)	$	115,297
Deferred revenues, current portion	27,242			9,774			37,016
Deferred revenue, net of current portion	44,179			(10,384		)	33,795
Total Liabilities	96,109			(610		)	95,499
Accumulated Deficit	(173,405		)	(844		)	(174,249		)
Total stockholders' equity	20,642			(844		)	19,798
Total liabilities and stockholders' equity	$	116,751		$	(1,454	)	$	115,297



	Research, Development & Commercial Milestones		Sales Milestones
Seattle Genetics	$	769	$	450
AstraZeneca	1,111		960
Servier	778		688
Total potential milestone payments	$	2,658	$	2,098