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GOSSAMER BIO (GOSS)
NASDAQ
$0.19-$0.01 (-7.09%)
Price as of Jun 03, 2026 7:13 PM EDT- $54.2MMarket Cap
- -83.59%1-Year Change
- BiotechnologyIndustry
GOSSAMER BIO (GOSS)
$0.19-$0.01 (-7.09%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
BLACKROCK, INC. | 7.17% | 16.8M | -230,183 (-1.37%) | Mar 31, 2026 |
VANGUARD GROUP INC | 5.49% | 12.9M | +863,436 (+6.71%) | Dec 31, 2025 |
N/A | 4.36% | 10.2M | +10.2M (+100.00%) | Mar 31, 2026 |
AQR CAPITAL MANAGEMENT LLC | 4.31% | 10.1M | +9.0M (+88.95%) | Mar 31, 2026 |
ARCH VENTURE MANAGEMENT, LLC | 3.43% | 8.1M | 0 (0.00%) | Mar 31, 2026 |
OCTAGON CAPITAL ADVISORS LP | 3.30% | 7.8M | -6.2M (-79.55%) | Mar 31, 2026 |
SAMSARA BIOCAPITAL, LLC | 3.08% | 7.2M | 0 (0.00%) | Mar 31, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 3.90% | 9.2M | +175,476 (+1.92%) | Mar 31, 2026 |
iSHARES TRUST | 3.74% | 8.8M | +69,941 (+0.80%) | Mar 31, 2026 |
LORD ABBETT INVESTMENT TRUST | 3.25% | 7.6M | 0 (0.00%) | Feb 28, 2026 |
Virtus Investment Trust | 2.82% | 6.6M | 0 (0.00%) | Mar 31, 2026 |
SPDR SERIES TRUST | 2.21% | 5.2M | 0 (0.00%) | Jan 31, 2026 |
FIDELITY SELECT PORTFOLIOS | 1.78% | 4.2M | 0 (0.00%) | Feb 28, 2026 |
AQR Funds | 1.73% | 4.0M | 0 (0.00%) | Mar 31, 2026 |
Current Ownership Distribution
- Institutions2.6B (73.81%)
- Mutual Funds894.2M (25.84%)
- Insiders12.1M (0.35%)
- Other0 (0.00%)
Insider Transactions
- 0.35% (12.1M)Current InsiderOwnership (%, shares)
- 1Number of InsiderBuying (last 12 months)
- $61,440.00Amount of InsiderBuying (last 12 months)
- 0Number of InsiderSelling (last 12 months)
- $0.00Amount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 506,250 | $0.00 | 0 |
Peterson Caryn EVP, Regulatory Affairs | Return | Mar 19, 2026 | $0.00 | 506,250 | $0.00 | 0 |
Giraudo Bryan COO/CFO | Return | Mar 19, 2026 | $0.00 | 693,750 | $0.00 | 0 |
Hasnain Faheem President & CEO | Return | Mar 19, 2026 | $0.00 | 1.7M | $0.00 | 0 |
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 440,000 | $0.00 | 0 |
Smith Robert Paul JR Chief Commercial Officer | Return | Mar 19, 2026 | $0.00 | 562,500 | $0.00 | 0 |
Aranda Richard Chief Medical Officer | Return | Mar 19, 2026 | $0.00 | 562,500 | $0.00 | 0 |
Hasnain Faheem President & CEO | Return | Mar 19, 2026 | $0.00 | 1.5M | $0.00 | 0 |
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 375,000 | $0.00 | 0 |
Peterson Caryn EVP, Regulatory Affairs | Return | Mar 19, 2026 | $0.00 | 440,000 | $0.00 | 0 |
Giraudo Bryan COO/CFO | Return | Mar 19, 2026 | $0.00 | 638,000 | $0.00 | 0 |
Hasnain Faheem President & CEO | Return | Mar 19, 2026 | $0.00 | 1.3M | $0.00 | 0 |
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 125,000 | $0.00 | 0 |
Smith Robert Paul JR Chief Commercial Officer | Return | Mar 19, 2026 | $0.00 | 572,000 | $0.00 | 0 |
Aranda Richard Chief Medical Officer | Return | Mar 19, 2026 | $0.00 | 572,000 | $0.00 | 0 |
Hasnain Faheem President & CEO | Return | Mar 19, 2026 | $0.00 | 437,500 | $0.00 | 0 |
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 157,500 | $0.00 | 0 |
Peterson Caryn EVP, Regulatory Affairs | Return | Mar 19, 2026 | $0.00 | 375,000 | $0.00 | 0 |
Giraudo Bryan COO/CFO | Return | Mar 19, 2026 | $0.00 | 543,750 | $0.00 | 0 |
Hasnain Faheem President & CEO | Return | Mar 19, 2026 | $0.00 | 544,500 | $0.00 | 0 |
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 157,500 | $0.00 | 0 |
Smith Robert Paul JR Chief Commercial Officer | Award | Mar 19, 2026 | $0.00 | 562,500 | $0.00 | 562,500 |
Aranda Richard Chief Medical Officer | Return | Mar 19, 2026 | $0.00 | 487,500 | $0.00 | 0 |
Hasnain Faheem President & CEO | Return | Mar 19, 2026 | $0.00 | 544,500 | $0.00 | 0 |
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 126,667 | $0.00 | 0 |
Peterson Caryn EVP, Regulatory Affairs | Return | Mar 19, 2026 | $0.00 | 125,000 | $0.00 | 0 |
Giraudo Bryan COO/CFO | Return | Mar 19, 2026 | $0.00 | 181,250 | $0.00 | 0 |
Hasnain Faheem President & CEO | Return | Mar 19, 2026 | $0.00 | 650,000 | $0.00 | 0 |
Christian Waage EVP, Tech Ops and Admin | Return | Mar 19, 2026 | $0.00 | 60,000 | $0.00 | 0 |
Smith Robert Paul JR Chief Commercial Officer | Award | Mar 19, 2026 | $0.00 | 572,000 | $0.00 | 572,000 |