Welcome to our dedicated page for Keros Therapeutics SEC filings (Ticker: KROS), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Keros Therapeutics, Inc. filings document a clinical-stage biopharmaceutical issuer developing therapeutics that modulate transforming growth factor-beta family signaling. Its 8-K reports cover financial results, Regulation FD corporate presentations, clinical-program announcements, collaboration disclosures, and board composition changes, while exchange registration disclosures identify Nasdaq-listed common stock and preferred share purchase rights.
The company’s proxy materials describe stockholder voting matters, board and committee governance, director compensation, and executive compensation. They also disclose portfolio strategy, including prioritization of rinvatercept, discontinued internal development activities for cibotercept, and related governance oversight of the company’s research and development focus.
Keros Therapeutics, Inc. director-affiliated investment entities reported selling common stock in connection with the company’s completion of a cash tender offer. OrbiMed-related funds disposed of 140,057 shares and 74,465 shares of Keros common stock at a price of $17.75 per share on 11/21/2025. Following these transactions, one OrbiMed fund reported indirect beneficial ownership of 759,155 shares, and another reported 45,057 shares, while the reporting entities each disclaim beneficial ownership beyond their pecuniary interest.
Keros Therapeutics director Carl L. Gordon reported indirect sales of Keros Therapeutics, Inc. common stock in connection with the company’s completion of a cash tender offer. On 11/21/2025, 140,057 shares of common stock were disposed of at $17.75 per share, leaving 759,155 shares beneficially owned indirectly. On the same date, an additional 74,465 shares were disposed of at $17.75 per share, leaving 45,057 shares beneficially owned indirectly.
The shares are held through OrbiMed-affiliated investment entities, including OrbiMed Private Investments VII, LP and OrbiMed Genesis Master Fund, L.P. Various OrbiMed general partners and OrbiMed Advisors LLC may be deemed to share voting and investment power over these holdings, but each related entity and person, including the reporting person, disclaims beneficial ownership beyond any pecuniary interest.
Keros Therapeutics, Inc. director reported share dispositions tied to the company’s cash tender offer. On 11/21/2025, the reporting person tendered 191,527 shares of common stock at $17.75 per share and separately tendered 130,494 shares at $17.75 per share, as noted in footnote (1) describing an issuer cash tender offer that began on October 20, 2025 and whose final results were announced on November 20, 2025. Following these transactions, the director beneficially owns 150,047 shares indirectly through Partners Innovation Fund, LLC, 102,233 shares indirectly through Partners Innovation Fund II, L.P., and 6,441 shares directly.
Keros Therapeutics, Inc. filed Amendment No. 2 to its Schedule TO, updating its issuer tender offer to repurchase up to 10,950,165 shares of common stock for a total of up to $194.4 million at $17.75 per share in cash, before taxes and without interest. The offer is being made under an Offer to Purchase and related Letter of Transmittal.
The amendment notes that on November 20, 2025 the company issued a press release announcing the final results of the tender offer, which expired at 5:00 p.m. New York City time on November 18, 2025, and files that press release as a new exhibit.
Keros Therapeutics, Inc. filed Amendment No. 1 to its Schedule TO for an issuer tender offer to repurchase up to 10,950,165 shares of its common stock for an aggregate purchase price of up to $194.4 million at $17.75 per share in cash, less any applicable withholding taxes and without interest. The offer is being made under an Offer to Purchase and Letter of Transmittal previously filed with the SEC.
The amendment updates additional information by noting that on November 19, 2025, Keros issued a press release announcing the preliminary results of the tender offer, which expired at 5:00 p.m., New York City time, on November 18, 2025. The press release is filed as a new exhibit and incorporated by reference.
Keros Therapeutics (KROS) filed its Q3 2025 report showing revenue of $14.3 million, driven by $10.0 million of license revenue and $4.3 million of service and other revenue. For the first nine months, revenue reached $243.7 million, reflecting the $200.0 million upfront from Takeda and a $10.0 million milestone after the first patient was dosed in the Phase 3 RENEW trial.
The company posted a Q3 net loss of $7.3 million, but delivered $110.5 million of net income year-to-date as licensing gains offset operating costs. Cash and cash equivalents were $693.5 million as of September 30, 2025. Operating expenses eased: research and development was $111.7 million year-to-date versus $128.0 million a year ago, aided by a workforce reduction plan (estimated $3.1 million in restructuring costs).
Keros advanced elritercept (KER-050) into Phase 3 under its Takeda agreement and plans a Phase 2 trial for KER-065 in Duchenne muscular dystrophy. Capital return actions included repurchasing 10,176,595 shares for $180.6 million at $17.75 per share and commencing an issuer tender offer of up to $194.4 million at the same price. Shares outstanding were 30,466,069 as of October 31, 2025.
Keros Therapeutics (KROS) furnished an Item 2.02 report stating it issued a press release announcing financial results for the quarter ended September 30, 2025. The press release is provided as Exhibit 99.1 and is incorporated by reference. The company notes the information is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, nor otherwise subject to that section’s liabilities. Securities listed include common stock on Nasdaq under KROS and preferred share purchase rights.
Keros Therapeutics (KROS) launched an issuer tender offer to repurchase up to 10,950,165 shares of its common stock for cash at $17.75 per share, for an aggregate purchase price of up to $194.4 million. The offer is being made upon the terms and subject to the conditions set forth in the Offer to Purchase and related Letter of Transmittal, and will be effected with proration, withdrawal rights, and other standard tender mechanics.
The company is the buyer in this transaction and will pay cash to tendering stockholders, less any applicable withholding taxes and without interest. Shares outstanding were 30,466,069 as of October 17, 2025; this is a baseline figure, not the amount being purchased.
Keros Therapeutics (KROS) — Form 4 filing: Pontifax-affiliated funds reported open market sales of common stock on 10/15/2025 at $17.75 per share. Reported disposals include 2,284,612 shares by Pontifax (Israel) IV, L.P.; 1,121,045 by Pontifax (Cayman) IV, L.P.; 1,226,412 by Pontifax (China) IV, L.P.; and 155,262 by Pontifax Late Stage Fund, L.P. Each fund reported 0 shares beneficially owned following the transactions.
The filing lists indirect ownership through Pontifax entities and indicates that Tomer Kariv and Ran Nussbaum each reported 5,250 shares indirectly. The footnotes state that, in connection with a Stock Purchase Agreement dated October 15, 2025 and their resignations from the board, the issuer accelerated the vesting of restricted stock units and certain options previously reported for Messrs. Kariv and Nussbaum.
Keros Therapeutics entered definitive agreements to repurchase 10,176,595 shares from affiliates of ADAR1 Capital Management and Pontifax Venture Capital at $17.75 per share, for an aggregate purchase price of approximately $181 million. The company also announced its intention to commence a tender offer to all stockholders, at $17.75 per share, to complete its previously announced plan to return $375.0 million of excess capital, subject to market conditions.
The company expects to complete the negotiated repurchases on or about October 15, 2025 and intends to launch the tender offer by the end of October 2025. As of September 30, 2025, cash and cash equivalents were preliminarily estimated at $693.5 million. Following the Pontifax agreement, directors Tomer Kariv and Ran Nussbaum resigned, and Jean‑Jacques Bienaimé was appointed Chair of the Nominating and Corporate Governance Committee. The repurchase parties agreed to standstill, voting commitments, and mutual non‑disparagement through the conclusion of the 2028 annual meeting certification.