Who Just RaisedSan Diego, CA · Health Care · Form D filed Sep 4, 2026
Gossamer Bio, Inc. raised $25M
Gossamer Bio, Inc. is a biotechnology company based in San Diego, California. In a Form D filed with the SEC on September 4, 2026, it reported raising $25,000,000 from 38 investors as part of an offering of up to $150,000,000. The first sale in the offering took place on August 20, 2026.
Science Seralutinib Seralutinib is an inhaled PDGFRα/β, CSF1R, and c‑KIT inhibitor designed to be delivered via dry powder inhaler for the potential treatment of pulmonary arterial hypertension (PAH)…
- 6th Form D since 2018. Earlier new notices: Aug 7, 2023 · Jul 18, 2022 · Aug 1, 2018 · Jan 19, 2018 · Jan 19, 2018. All filings on EDGAR
- Still raising. $125M of the $150M offering was still unsold at filing.
$357M raised since 2020
3 Form D offerings, as reported to the SEC, the first in Jul 18, 2022. Amendments update a round; they aren't counted twice.
| Filed | Sold | Offering size | Investors |
|---|---|---|---|
| Sep 4, 2026 | $25M | $150M | 38 |
| Aug 7, 2023 | $212M | $212M | 70 |
| Jul 18, 2022 | $120M | $120M | 23 |
Placement agents: Leerink Partners LLC, Cantor Fitzgerald & Co., Wedbush Securities Inc., H.C. Wainwright & Co., LLC, Piper Sandler & Co.
Lead score
33 out of 100
still raising budget to spend website found
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Filing details
- Website
- gossamerbio.com
- Amount raised
- $25,000,000
- Offering size
- $150,000,000
- Investors so far
- 38
- First sale
- August 20, 2026
- Securities offered
- Options or warrants, Securities issuable on exercise or conversion
- Exemption claimed
- Rule 506(b)
- Industry
- Biotechnology
- Headquarters
- San Diego, California
- Incorporated
- Delaware
- Entity type
- Corporation
Filings
| Filed | Form | Raised | Offering size | Investors | Source |
|---|---|---|---|---|---|
| D (new notice) | $25,000,000 | $150,000,000 | 38 | SEC filing |
Figures come from the company's own filing with the SEC and are shown as reported. How to read a Form D.
Updated · Raises in the week of Aug 31, 2026 · Health Care funding in California · September 2026 funding report
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