# EDGAR Filing Document

**Accession Number:** 0001377121
**File Stem:** 0001104659-25-107753
**Filing Date:** 2025-11
**Character Count:** 23242
**Document Hash:** d8528b17d3026fad7ce3b1a247a49956
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-107753.hdr.sgml**: 20251106

**ACCESSION NUMBER**: 0001104659-25-107753

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20251106

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251106

**DATE AS OF CHANGE**: 20251106

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Protagonist Therapeutics, Inc
- **CENTRAL INDEX KEY:** 0001377121
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 980505495
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37852
- **FILM NUMBER:** 251458611

**BUSINESS ADDRESS:**
- **STREET 1:** 7707 GATEWAY BLVD., SUITE 140
- **CITY:** NEWARK
- **STATE:** CA
- **ZIP:** 94560-1160
- **BUSINESS PHONE:** (510) 474-0170

**MAIL ADDRESS:**
- **STREET 1:** 7707 GATEWAY BLVD., SUITE 140
- **CITY:** NEWARK
- **STATE:** CA
- **ZIP:** 94560-1160

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Protagonist Therapeutics Inc
- **DATE OF NAME CHANGE:** 20130605

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Protagonist Inc
- **DATE OF NAME CHANGE:** 20061002

?xml version='1.0' encoding='ASCII'?

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d)**

**of the Securities Exchange Act of 1934**

Date of Report (Date of earliest event reported): **November 6, 2025**

**PROTAGONIST THERAPEUTICS, INC.**

(Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-37852** | **98-0505495** |
| (State or other jurisdiction<br> of incorporation) | (Commission<br> File Number) | (IRS Employer<br> Identification No.) |

---

**Protagonist Therapeutics, Inc.** 

**7707 Gateway Blvd., Suite 140**

**Newark, California 94560-1160**

(Address of principal executive offices, including zip code)

**(510) 474-0170**

(Registrant's telephone number, including area code)

**Not Applicable**

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

◻ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

◻ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

◻ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

◻ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which<br> registered** |
| Common Stock, par value $0.00001 | PTGX | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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. ◻

**Item 2.02. Results of Operations and Financial Condition.**

On November 6, 2025, Protagonist Therapeutics, Inc. reported its financial results for the quarter ended September 30, 2025. A copy of the press release titled "Protagonist Reports Third Quarter 2025 Financial Results and Provides Corporate Update" is furnished pursuant to Item 2.02 as Exhibit 99.1 hereto and is incorporated herein by reference.

**Item 9.01 Financial Statements and Exhibits.**

(d) Exhibits

---

| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| [99.1](tm2530353d1_ex99-1.htm) | [Press release, dated November 6, 2025, titled "Protagonist Reports Third Quarter 2025 Financial Results and Provides Corporate Update."](tm2530353d1_ex99-1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

The information in this report, including the exhibit hereto, shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of Section 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by Protagonist Therapeutics, Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing.

**SIGNATURE**

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

---

| | | |
|:---|:---|:---|
|  | **Protagonist Therapeutics, Inc.** | **Protagonist Therapeutics, Inc.** |
| Dated: November 6, 2025 |  |  |
|  | By: | /s/ Asif Ali |
|  |  | Asif Ali |
|  |  | Chief Financial Officer |

---

## Exhibit 99.1

**Exhibit 99.1**

![](tm2530353d1_ex99-1img001.jpg)

**Protagonist Reports Third Quarter 2025 Financial Results and Provides Corporate Update**

*Following the NDA submission for icotrokinra treatment of adults and adolescents with moderate to severe plaque psoriasis to the U.S. FDA in July, the European Medicines Agency (EMA) application was submitted in September*

*Rusfertide granted breakthrough designation for patients in Polycythemia Vera (PV) and the subject of four presentations including 52-week results of the VERIFY Phase 3 Study at ASH, the 67<sup>th</sup> Annual American Society of Hematology (ASH) meeting in December*

*First patient dosed in the Phase 1 trial of PN-881, a first-in-class oral IL-17 peptide antagonist*

*IND-enabling studies progressing as planned with triple-GLP/GIP/GCG agonists PN-477sc and PN-477o*

*Oral hepcidin development candidate expected to be nominated by year end*

*Cash, cash equivalents and marketable securities of $678.8 million as of September 30, 2025, anticipated to provide cash runway through at least end of 2028*

**NEWARK, Calif., November 6, 2025** – Protagonist Therapeutics (Nasdaq: PTGX) ("Protagonist" or "the Company") today reported financial results for the third quarter ended September 30, 2025, and provided a corporate update.

"2025 continues to be a highly productive year with significant accomplishments in both partnered and wholly owned programs," said Dinesh V. Patel, Ph.D., the Company's President and CEO. "In addition to the NDA and EMA submissions for icotrokinra for psoriasis, we are pleased to see our partner Johnson and Johnson expand the ICONIC program into additional IL-23 pathway relevant and validated I&I indications, namely psoriatic arthritis, ulcerative colitis, and Crohn's disease. We, along with our partner Takeda, eagerly await the presentation of the rusfertide 52-week VERIFY data at ASH in December and the NDA filing for rusfertide by year end."

"As icotrokinra and rusfertide move towards potential NDA approval and commercialization in 2026, we shift our attention to the next phase of assets emerging from our validated discovery and development platform. We are pleased to report that the first subject in the Phase 1 trial of oral IL-17 antagonist, PN-881, is dosed. Additionally, the oral and subcutaneous triple GLP/GIP/GCG agonists, PN-477o and PN-477sc, are progressing through IND-enabling studies as planned, and we remain on track to nominate a development candidate from the oral hepcidin program by year end. I am very proud of the consistent innovation and execution capabilities of the Protagonist team," Patel said.

**Third Quarter 2025 Recent Developments and Upcoming Milestones**

***I*** ***cotrokinra: Oral IL-23 Receptor Antagonist***

&nbsp;&nbsp;&nbsp;&nbsp;· In
 November, publications of ICONIC-LEAD data through Week 24 (available <u>here</u>) and ICONIC-TOTAL
 data through Week 16 (available <u>here</u>) were published in the New England Journal of
 Medicine, and the NEJM Evidence, respectively.

&nbsp;&nbsp;&nbsp;&nbsp;· On October 27th, the Company and Johnson and Johnson <u>announced</u> Week 28 results from the Phase 2b ANTHEM-UC study of icotrokinra in adults with moderately to severely active ulcerative colitis (UC)
at the 2025 ACG Annual Scientific Meeting. I cotrokinra demonstrated
clinically meaningful outcomes at Week 28 with 31.7% of patients achieving clinical remission and 38.1% showing endoscopic improvement
versus placebo .

&nbsp;&nbsp;&nbsp;&nbsp;· On October 26<sup>th</sup>, new long-term 52-week data from the Phase 3 ICONIC-TOTAL study, was <u>presented</u> at the 2025
Fall Clinical Dermatology Conference. The data show icotrokinra demonstrated high and durable rates of site-specific psoriasis clearance
affecting these high-impact and difficult-to-treat areas of the body.

&nbsp;&nbsp;&nbsp;&nbsp;· On October 7th, the Company and its partner JNJ <u>announced</u> Week 12 results from the Phase 2b ANTHEM-UC study of icotrokinra
in adults with moderately to severely active UC at United European Gastroenterology Week (UEGW) 2025.

&nbsp;&nbsp;&nbsp;&nbsp;· On September 17th, new <u>data</u> from the Phase 3 ICONIC-ADVANCE 1 and 2 studies, which assessed the superiority of icotrokinra
compared to deucravacitinib in patients with moderate-to-severe plaque psoriasis (PsO), was presented at the 2025 European Academy of
Dermatology and Venereology (EADV) Congress in Paris, France. Additionally, new long-term 52-week data from the Phase 3 ICONIC-LEAD study
investigating icotrokinra in adults and pediatric patients 12 years of age and older (adolescents) with moderate to severe PsO was presented
as a late-breaking abstract at EADV.

&nbsp;&nbsp;&nbsp;&nbsp;· On September 11th, the Company <u>announced</u> the submission of an application to the European Medicines Agency (EMA) by JNJ
seeking the first approval of icotrokinra for the treatment of adults and pediatric patients 12 years of age and older (adolescents) with
moderate-to-severe PsO .

&nbsp;&nbsp;&nbsp;&nbsp;· On July 21st, the Company <u>announced</u> submission of a New Drug Application (NDA) to the U.S. FDA by JNJ seeking the first
approval of icotrokinra, a first-in-class investigational targeted oral peptide for the treatment of adults and pediatric patients 12
years of age and older with moderate to severe PsO.

***Rusfertide: Subcutaneous Injectable Hepcidin Mimetic for Polycythemia Vera (PV) and Other Blood Disorders***

&nbsp;&nbsp;&nbsp;&nbsp;· Clinical data on rusfertide in PV, including the Phase 3 VERIFY study, are the focus of four presentations planned at the 67<sup>th</sup>
Annual American Society of Hematology (ASH) Annual Meeting being held in Orlando, Florida from December 6-9, 2025. This includes
an oral presentation of the durability of response and safety results through week 52 from the VERIFY study.

&nbsp;&nbsp;&nbsp;&nbsp;· On August 25th, the Company and its partner Takeda Pharmaceuticals <u>announced</u> rusfertide was granted Breakthrough Therapy Designation by the U.S. Food and Drug Administration (FDA) for the treatment of erythrocytosis in
patients with PV.

&nbsp;&nbsp;&nbsp;&nbsp;· Rusfertide U.S. NDA filing for treatment of patients with PV, by partner Takeda Pharmaceuticals, is expected in Q4 of this year.

***Discovery and Development Pipeline***

&nbsp;&nbsp;&nbsp;&nbsp;· The first human subject has been dosed in the Phase 1 trial (<u>NCT07153146</u>) of PN-881, a first-in-class oral IL-17 peptide antagonist,
evaluating safety, tolerability, pharmacokinetics, and pharmacodynamics in healthy adult participants.

&nbsp;&nbsp;&nbsp;&nbsp;· The triple GLP/GIP/GCG agonists PN-477sc and PN-477o are progressing through IND-enabling studies with clinical study initiation of
PN-477sc anticipated by mid-2026, and initiation of PN-477o anticipated in the second half of 2026.

&nbsp;&nbsp;&nbsp;&nbsp;· The Company plans to nominate a development candidate ready for IND-enabling studies from the oral hepcidin program by year end.

**Third Quarter 2025 Financial Results**

&nbsp;&nbsp;&nbsp;&nbsp;· **Cash, Cash Equivalents and Marketable Securities**: Cash, cash equivalents and marketable securities as of September 30,
2025, were $678.8 million as compared to $559.2 million as of December 31, 2024.

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br> September 30,** | **Three Months Ended<br> September 30,** | **Nine Months Ended<br> September 30,** | **Nine Months Ended<br> September 30,** |
| <br>(in thousands, except per share amounts) | **2025** | **2024** | **2025** | **2024** |
|  | **(Unaudited)** | **(Unaudited)** | **(Unaudited)** | **(Unaudited)** |
| License and collaboration revenue | $4712 | $4675 | $38579 | $263795 |
| Research and development expense | $40003 | $35970 | $112932 | $103224 |
| General and administrative expense | $11130 | $10158 | $33419 | $34508 |
| Net (loss) income | $(39339) | $(33210) | $(85765) | $143514 |
| &nbsp;&nbsp;&nbsp;Basic earnings (loss) per share | $(0.62) | $(0.54) | $(1.35) | $2.34 |
| &nbsp;&nbsp;&nbsp;Diluted earnings (loss) per share | $(0.62) | $(0.54) | $(1.35) | $2.22 |

---

&nbsp;&nbsp;&nbsp;&nbsp;· **License and Collaboration Revenue**:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;o License and collaboration revenue was $4.7 million for both the three months ended 2025 and 2024 and was comprised of development
services we provided under the Takeda collaboration agreement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;o License and collaboration revenue of $38.6 million for the nine months ended September 30, 2025 was comprised of (i) proportional
recognition of a $25 million milestone earned from Takeda in Q1 25, and (ii) development services we provided during the period.
License and collaboration revenue of $263.8 million for the nine months ended September 30, 2024 included (i) $254.1 million
of the $300.0 million initial transaction price for the Takeda collaboration agreement allocated to the rusfertide license upon effectiveness
of the agreement, and (ii) development services we provided during the period.

&nbsp;&nbsp;&nbsp;&nbsp;· **Research and Development ("R&D") Expenses**: Increased by $4.0 million and $9.7 million for the three and nine
months ended September 30, 2025, respectively, from the prior year periods. The increases were primarily due to increases in drug
discovery and pre-clinical research expenses.

&nbsp;&nbsp;&nbsp;&nbsp;· **General and Administrative ("G&A") Expenses**: Increased by $1.0 million for the three months ended September 30,
2025, from the prior year period primarily due to increases in professional services. The decrease of $1.1 million in G&A expenses
for the nine months ended September 30, 2025, from the prior year period was primarily due to $4.6 million in one-time advisory and
legal fees related to the Takeda collaboration in Q1 24, partially offset by increases in personnel-related expenses and professional
services.

&nbsp;&nbsp;&nbsp;&nbsp;· **Net Income (Loss)**: Net loss was ($39.3) million, or ($0.62) per basic and diluted share, for the three months ended September 30,
2025, as compared to a net loss of ($33.2) million, or ($0.54) per basic and diluted share, for the three months ended September 30,
2024. Net loss was ($85.8) million, or ($1.35) per basic and diluted share, for the nine months ended September 30, 2025, as compared
to net income of $143.5 million, or $2.34 per basic share and $2.22 per diluted share, for the nine months ended September 30, 2024.

**About Protagonist**

Protagonist Therapeutics is a discovery through late-stage development biopharmaceutical company. Two novel peptides derived from Protagonist's proprietary discovery platform are currently in advanced Phase 3 clinical development, with a New Drug Application (NDA) for icotrokinra submitted to the FDA in July, and the NDA submission for rusfertide expected by end of 2025. Icotrokinra (formerly, JNJ-2113), is a first-in-class investigational targeted oral peptide that selectively blocks the Interleukin-23 receptor ("IL-23R"), which is licensed to Janssen Biotech, Inc., a Johnson & Johnson company. Following icotrokinra's joint discovery by Protagonist and Johnson & Johnson scientists pursuant to the companies' IL-23R collaboration, Protagonist was primarily responsible for the development of icotrokinra through Phase 1, with Johnson & Johnson assuming responsibility for development in Phase 2 and beyond. Rusfertide, a mimetic of the natural hormone hepcidin, is currently in Phase 3 development for the rare blood disorder polycythemia vera (PV). Rusfertide is being co-developed and will be co-commercialized with Takeda Pharmaceuticals pursuant to a worldwide collaboration and license agreement entered in 2024 under which the Company remains primarily responsible for development through NDA filing. The Company also has a number of preclinical stage drug discovery programs addressing clinically and commercially validated targets, including IL-17 oral peptide antagonist PN-881, obesity triple agonist peptide PN-477, and the oral hepcidin program.

More information on Protagonist, its pipeline drug candidates, and clinical studies can be found on the Company's website at <u>https://www.protagonist-inc.com</u>.

**Cautionary Note on Forward-Looking Statements**

This press release contains forward-looking statements for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements regarding the potential benefits of icotrokinra and PN-881, and expectations regarding the icotrokinra and PN-881 development programs. In some cases, you can identify these statements by forward-looking words such as "anticipate," "believe," "may," "will," "expect," or the negative or plural of these words or similar expressions. Forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties that could cause actual results and events to differ materially from those anticipated, including, but not limited to, our ability to develop and commercialize our product candidates, our ability to earn milestone payments under our collaboration agreements with Janssen and Takeda, our ability to use and expand our programs to build a pipeline of product candidates, our ability to obtain and maintain regulatory approval of our product candidates, our ability to operate in a competitive industry and compete successfully against competitors that have greater resources than we do, and our ability to obtain and adequately protect intellectual property rights for our product candidates. Additional information concerning these and other risk factors affecting our business can be found in our periodic filings with the Securities and Exchange Commission, including under the heading "Risk Factors" contained in our most recently filed periodic reports on Form 10-K and Form 10-Q filed with the Securities and Exchange Commission. Forward-looking statements are not guarantees of future performance, and our actual results of operations, financial condition, and liquidity, and the development of the industry in which we operate, may differ materially from the forward-looking statements contained in this press release. Any forward-looking statements that we make in this press release speak only as of the date of this press release. We assume no obligation to update our forward-looking statements, whether as a result of new information, future events, or otherwise, after the date of this press release.

**Investor Relations Contact**

Corey Davis, Ph.D.

LifeSci Advisors<br> cdavis@lifesciadvisors.com

+1 212 915 2577

**Media Relations Contact**

Virginia Amann<br> ENTENTE Network of Companies

virginiaamann@ententeinc.com<br> +1 833 500 0061 ext 1

**PROTAGONIST THERAPEUTICS, INC.**

**Condensed Consolidated Statements of Operations**

**(Unaudited)**

**(Amounts in thousands except share and per share data)**

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| License and collaboration revenue | $4712 | $4675 | $38579 | $263795 |
| Operating expense: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Research and development <sup>(1)</sup> | 40003 | 35970 | 112932 | 103224 |
| &nbsp;&nbsp;&nbsp;General and administrative <sup>(1)</sup> | 11130 | 10158 | 33419 | 34508 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total operating expense | 51133 | 46128 | 146351 | 137732 |
| (Loss) income from operations | (46421) | (41453) | (107772) | 126063 |
| Interest income | 7049 | 7682 | 22028 | 19462 |
| Other income, net | 33 | 141 | 151 | 219 |
| (Loss) income before income tax benefit (expense) | (39339) | (33630) | (85593) | 145744 |
| Income tax benefit (expense) | - | 420 | (172) | (2230) |
| Net (loss) income | $(39339) | $(33210) | $(85765) | $143514 |
| Net (loss) income per share, basic | $(0.62) | $(0.54) | $(1.35) | $2.34 |
| Net (loss) income per share, diluted | $(0.62) | $(0.54) | $(1.35) | $2.22 |
| Weighted-average shares used to compute net (loss) income per share, basic | 63772332 | 61767934 | 63418522 | 61311310 |
| Weighted-average shares used to compute net (loss) income per share, diluted | 63772332 | 61767934 | 63418522 | 64611941 |

---

(1) Amount includes non-cash stock-based compensation expense.

**Stock-based Compensation**

**(Unaudited, in thousands)**

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Three Months Ended** | **Three Months Ended** | **Nine Months Ended** | **Nine Months Ended** |
|  | **September 30,** | **September 30,** | **September 30,** | **September 30,** |
|  | **2025** | **2024** | **2025** | **2024** |
| Research and development | $6019 | $5212 | $20301 | $15597 |
| General and administrative | 4540 | 4953 | 14972 | 12864 |
| Total stock-based compensation expense | $10559 | $10165 | $35273 | $28461 |

---

**PROTAGONIST THERAPEUTICS, INC.**

**Selected Condensed Consolidated Balance Sheet Data**

**(Unaudited, In thousands)**

---

| | | |
|:---|:---|:---|
|  | **September 30,<br> 2025** | **December 31,<br> 2024** |
| Cash, cash equivalents and marketable securities | $678820 | $559165 |
| Working capital | 541482 | 544243 |
| Total assets | 701688 | 744725 |
| Deferred revenue | 16988 | 30567 |
| Accumulated deficit | (426287) | (340522) |
| Total stockholders' equity | 645437 | 675295 |

---