Gossamer Bio, INC

Market Movers (8-K)

NASDAQ
Gossamer Bio announced the reacquisition of worldwide rights to seralutinib from Chiesi, alongside a planned September 2026 NDA submission for PAH following FDA feedback.
NASDAQ
Gossamer Bio announced the conversion rate for its 2030 Convertible Notes and the exercise price for its Purchase Warrants, with a reference price of $0.17.
NASDAQ
Gossamer Bio announced final results for its exchange offer, successfully exchanging a significant portion of its 5.00% Convertible Senior Notes due 2027 for new 7.50% Convertible Senior Secured First Lien Notes due 2030, common stock, and warrants.
Capital raise
NASDAQ
Gossamer Bio announced an extension of the early tender deadline for its exchange offer and consent solicitation for its 5.00% Convertible Senior Notes due 2027.
Delay expected
Capital raise
NASDAQ
Gossamer Bio initiates an exchange offer for its 5.00% Convertible Senior Notes due 2027, proposing new notes, common stock, and warrants, alongside a consent solicitation to amend indenture covenants.
Capital raise
NASDAQ
Gossamer Bio received a notice from Nasdaq indicating its common stock has fallen below the $1.00 minimum bid price requirement for continued listing on the Nasdaq Global Select Market.
Worse than expected

Quarterly Earnings (10-Q)

NASDAQ
Gossamer Bio reported a significant increase in net loss for the nine months ended September 30, 2025, despite progress in its seralutinib clinical programs and ongoing collaboration revenue.
Worse than expected
Capital raise
NASDAQ
Gossamer Bio, a late-stage biopharmaceutical company, reported a significant net loss and increased cash burn in Q2 2025, driven by higher research and development expenses for its lead candidate seralutinib.
Capital raise
Worse than expected
NASDAQ
Gossamer Bio reports a net loss of $36.6 million for Q1 2025, with revenue driven by the Chiesi collaboration and ongoing development of Seralutinib.
Better than expected
Capital raise
NASDAQ
Gossamer Bio's third quarter 2024 results show a net loss of $30.8 million, but also include significant revenue from a collaboration agreement.
Better than expected
Capital raise
NASDAQ
Gossamer Bio announced a profitable second quarter of 2024, driven by a significant collaboration agreement with Chiesi, while also detailing ongoing clinical development and financial updates.
Better than expected
NASDAQ
Gossamer Bio reports a net loss of $41.9 million for the first quarter of 2024, while highlighting a new global collaboration with Chiesi for seralutinib.
Better than expected
Capital raise

Annual Reports (10-K)

NASDAQ
Gossamer Bio announced a workforce reduction and missed the primary endpoint in its Phase 3 PROSERA trial for seralutinib, leading to strategic re-evaluation and a need for additional capital.
Delay expected
Worse than expected
Capital raise
NASDAQ
Gossamer Bio's 2024 10-K filing details the company's focus on seralutinib for pulmonary hypertension, its collaboration with Chiesi, and ongoing clinical trials.
NASDAQ
Gossamer Bio's 2023 10-K filing highlights the company's focus on developing seralutinib for pulmonary hypertension, including ongoing Phase 3 trials and future plans for PH-ILD.
Capital raise

Insider Trading (Form 4)

NASDAQ
Gossamer Bio director John D. Quisel was granted 115,000 stock options as part of the company's non-employee director compensation program.
NASDAQ
Director Skye Drynan was granted 115,000 stock options in Gossamer Bio, Inc. as part of the company's non-employee director compensation program.
NASDAQ
Director Daniel Thomas O was granted 115,000 stock options in Gossamer Bio, Inc. as part of the company's non-employee director compensation program.
NASDAQ
Director Russell J. Cox was granted 115,000 stock options as part of the Gossamer Bio, Inc. non-employee director compensation program.
NASDAQ
Director Sandra Milligan was granted 115,000 stock options as part of the Gossamer Bio Non-Employee Director Compensation Program.
NASDAQ
Director Steven D. Nathan was granted 115,000 stock options as part of the Gossamer Bio, Inc. non-employee director compensation program.

Proxy Statements (Def-14A)

NASDAQ
Gossamer Bio is holding a special meeting of stockholders to vote on several proposals, including an exchange offer for its convertible notes, an amendment to its incentive award plan, and an increase in authorized shares.
Capital raise
NASDAQ
Gossamer Bio, Inc. has issued its 2026 proxy statement detailing director elections, executive compensation, and auditor ratification for the upcoming annual meeting.
Worse than expected
Delay expected
NASDAQ
Gossamer Bio is holding its annual meeting and seeking shareholder ratification of Ernst & Young LLP as its independent auditor for the year ending December 31, 2020.
NASDAQ
Gossamer Bio sets June 25, 2025, for its annual stockholder meeting and proposes an amendment to its 2019 Incentive Award Plan.
NASDAQ
Gossamer Bio is holding its annual meeting and seeking shareholder ratification of Ernst & Young LLP as its independent auditor for the year ending December 31, 2020.
NASDAQ
Gossamer Bio will hold its annual stockholders meeting virtually on June 6, 2024, to vote on director elections, auditor ratification, and executive compensation.

Schedule 13D - Activist Investments

NASDAQ
D. E. Shaw entities have filed an amendment to their Schedule 13D, reporting a combined beneficial ownership of 7.1% of Gossamer Bio, Inc. common stock.
NASDAQ
D.E. Shaw entities report transactions in Gossamer Bio common stock over the past 60 days, with significant net sales.
NASDAQ
D. E. Shaw & Co. reports a 9.5% beneficial ownership stake in Gossamer Bio following a debt-for-equity exchange offer.
Capital raise
NASDAQ
Growth Equity Opportunities 18 VGE, LLC and affiliated entities have significantly reduced their beneficial ownership in Gossamer Bio, Inc. through recent open market sales.
Worse than expected

Schedule 13G - Passive Investments

NASDAQ
Opaleye Management Inc., Opaleye L.P., and James Silverman have jointly filed a Schedule 13G, reporting beneficial ownership of over 5% of Gossamer Bio, Inc. common stock.
NASDAQ
DeepCurrents Investment Group LLC and affiliates have reported a 7.7% beneficial ownership stake in Gossamer Bio, Inc. via a Schedule 13G filing.
NASDAQ
683 Capital Management, LLC and Ari Zweiman have reported a 9.99% beneficial ownership stake in Gossamer Bio, Inc. as of June 11, 2026.
NASDAQ
Context Capital Management, LLC and its affiliates have reported beneficial ownership of 48,835,788 shares, representing 9.9% of the outstanding common stock of Gossamer Bio, Inc.
NASDAQ
Octagon Capital Advisors LP, along with affiliated entities and Ting Jia, has reported beneficial ownership of 8,976,054 shares, representing 3.8% of Gossamer Bio, Inc.'s common stock.
NASDAQ
The Vanguard Group has filed an Amendment No. 6 to Schedule 13G, reporting zero beneficial ownership in Gossamer Bio Inc. Common Stock following an internal realignment.