GOSS — Gossamer Bio, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2019-02-08.
Performance
Technicals
Others in Healthcare
Measured signals that fired on GOSS
| date | signal | measured base rate |
|---|---|---|
| 2026-08-17 | Short volume far above its own normal short | -0.76% over 21 days · t = -2.79 · n = 5,897 statistically distinguishable from its control group |
| 2026-07-14 | Equal lows taken out structure | -0.64% over 21 days · t = -4.75 · n = 55,661 statistically distinguishable from its control group |
| 2026-05-11 | Equal lows taken out structure | -0.64% over 21 days · t = -4.75 · n = 55,661 statistically distinguishable from its control group |
| 2026-04-22 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-03-24 | Equal lows taken out structure | -0.64% over 21 days · t = -4.75 · n = 55,661 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-01-02 | Aranda Richard Chief Medical Officer | Grant or award | 93.8K | 0.00 | 0 |
| 2026-01-02 | Giraudo Bryan COO/CFO | Grant or award | 115.8K | 0.00 | 0 |
| 2026-01-02 | Peterson Caryn EVP, Regulatory Affairs | Grant or award | 84.5K | 0.00 | 0 |
| 2026-01-02 | Christian Waage EVP, Tech Ops and Admin | Grant or award | 84.5K | 0.00 | 0 |
| 2026-01-02 | Smith Robert Paul JR Chief Commercial Officer | Grant or award | 93.8K | 0.00 | 0 |
| 2026-01-02 | Hasnain Faheem President & CEO | Grant or award | 280.0K | 0.00 | 0 |
| 2025-10-01 | Peterson Caryn EVP, Regulatory Affairs | Grant or award | 125.0K | 0.00 | 0 |
| 2025-10-01 | Giraudo Bryan COO/CFO | Grant or award | 181.2K | 0.00 | 0 |
| 2025-10-01 | Smith Robert Paul JR Chief Commercial Officer | Grant or award | 162.5K | 0.00 | 0 |
| 2025-10-01 | Christian Waage EVP, Tech Ops and Admin | Grant or award | 125.0K | 0.00 | 0 |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| Kalehua Capital Management LLC | 5.8M | 17.7M |
| BlackRock, Inc. | 5.5M | 16.8M |
| AQR CAPITAL MANAGEMENT LLC | 3.3M | 10.1M |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | 9.4M |
| ARCH Venture Management, LLC | 2.6M | 8.1M |
| Octagon Capital Advisors LP | 2.5M | 7.8M |
| SAMSARA BIOCAPITAL, LLC | 2.4M | 7.2M |
| Balyasny Asset Management L.P. | 1.9M | 5.9M |
| Siren, L.L.C. | 1.7M | 5.2M |
| 683 Capital Management, LLC | 1.6M | 5.0M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 8-K | 2026-08-13 | 2026-08-13 | on EDGAR ↗ |
| 10-Q | 2026-08-13 | 2026-06-30 | on EDGAR ↗ |
| SCHEDULE 13G | 2026-07-29 | — | on EDGAR ↗ |
| SCHEDULE 13G/A | 2026-07-29 | — | on EDGAR ↗ |
| 8-K | 2026-07-27 | 2026-07-23 | on EDGAR ↗ |
| SCHEDULE 13D/A | 2026-07-24 | — | on EDGAR ↗ |
| 8-K | 2026-07-15 | 2026-07-14 | on EDGAR ↗ |
| SCHEDULE 13D/A | 2026-07-01 | — | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Gossamer Bio announces up to $250M private placement · 2026-08-21
- Gossamer Bio, Inc. (GOSS) filed form 8-K · 2026-08-21 · SEC EDGAR
- Gossamer Bio GAAP EPS of -$0.08 beats by $0.06, revenue of $9.24M beats by $5.61M · 2026-08-13
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