Gossamer Bio, Inc.
Total Trades
33
Buys
13
Sells
20
Largest Trade
$1M+
Insiders
8
Institutional Funds
149
Inst. Value
$1M+
Activist Filings
23
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Aranda Richard | Chief Medical Offi… | SELL | $1K–$15K | 2K | $0.66 | Jun 25, 2024 |
| Hasnain Faheem | President & CEO | BUY | $100K–$500K | 372K | $0.67 | Jun 24, 2024 |
| Giraudo Bryan | COO/CFO | BUY | $50K–$100K | 100K | $0.59 | Jun 21, 2024 |
| Smith Robert Paul JR | Chief Commercial O… | BUY | $15K–$50K | 25K | $0.60 | Jun 21, 2024 |
| Christian Waage | EVP | SELL | $1K–$15K | 6K | $1.16 | Mar 28, 2024 |
| Giraudo Bryan | COO/CFO | SELL | $1K–$15K | 6K | $1.16 | Mar 28, 2024 |
| Hasnain Faheem | President & CEO | SELL | $15K–$50K | 23K | $1.16 | Mar 28, 2024 |
| Milligan Sandra | Director | BUY | $15K–$50K | 32K | $0.79 | Nov 17, 2023 |
| Giraudo Bryan | COO/CFO | BUY | $100K–$500K | 200K | $0.56 | Nov 14, 2023 |
| Aranda Richard | Chief Medical Offi… | SELL | $1K–$15K | 2K | $1.29 | Jun 26, 2023 |
| Giraudo Bryan | COO/CFO | BUY | $50K–$100K | 55K | $1.02 | Apr 5, 2023 |
| Christian Waage | EVP | BUY | $15K–$50K | 19K | $1.20 | Mar 22, 2023 |
| Giraudo Bryan | COO/CFO | BUY | $15K–$50K | 50K | $0.97 | Mar 22, 2023 |
| Hasnain Faheem | President & CEO | BUY | $1M+ | 879K | $1.14 | Mar 22, 2023 |
| Carter Laura | Chief Scientific O… | SELL | $1K–$15K | 6K | $1.10 | Mar 20, 2023 |
| Aranda Richard | Chief Medical Offi… | SELL | $1K–$15K | 8K | $1.10 | Mar 20, 2023 |
| Peterson Caryn | EVP | SELL | $1K–$15K | 8K | $1.10 | Mar 20, 2023 |
| Peterson Caryn | EVP | SELL | $50K–$100K | 5K | $12.07 | Oct 25, 2022 |
| Carter Laura | Chief Scientific O… | SELL | $50K–$100K | 5K | $12.07 | Oct 25, 2022 |
| Aranda Richard | Chief Medical Offi… | SELL | $50K–$100K | 5K | $12.07 | Oct 25, 2022 |
| Carter Laura | Chief Scientific O… | BUY | $15K–$50K | 7K | $7.21 | Jul 15, 2022 |
| Christian Waage | EVP | BUY | $15K–$50K | 7K | $7.21 | Jul 15, 2022 |
| Giraudo Bryan | COO/CFO | BUY | $50K–$100K | 14K | $7.21 | Jul 15, 2022 |
| Hasnain Faheem | President & CEO | BUY | $500K+ | 139K | $7.21 | Jul 15, 2022 |
| Carter Laura | Chief Scientific O… | SELL | $50K–$100K | 9K | $8.25 | Jul 5, 2022 |
| Aranda Richard | Chief Medical Offi… | SELL | $1K–$15K | 2K | $6.88 | Jun 23, 2022 |
| Carter Laura | Chief Scientific O… | SELL | $1K–$15K | 1K | $7.20 | May 5, 2022 |
| Christian Waage | EVP | SELL | $50K–$100K | 11K | $8.91 | Mar 24, 2022 |
| Hasnain Faheem | President & CEO | SELL | $100K–$500K | 19K | $8.91 | Mar 24, 2022 |
| Giraudo Bryan | COO/CFO | SELL | $50K–$100K | 11K | $8.91 | Mar 24, 2022 |
| Carter Laura | Chief Scientific O… | SELL | $15K–$50K | 5K | $8.28 | Mar 17, 2022 |
| Peterson Caryn | EVP | SELL | $50K–$100K | 6K | $8.28 | Mar 17, 2022 |
| Aranda Richard | Chief Medical Offi… | SELL | $50K–$100K | 6K | $8.28 | Mar 17, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 149 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| NEA Management Company, LLC | 18.1M | $1M+ | SH |
| Octagon Capital Advisors LP | 13.9M | $1M+ | SH |
| STATE STREET CORP | 9.3M | $1M+ | SH |
| Samsara BioCapital, LLC | 7.2M | $1M+ | SH |
| Siren, L.L.C. | 5.2M | $1M+ | SH |
| HHLR ADVISORS, LTD. | 5.0M | $1M+ | SH |
| Palo Alto Investors LP | 4.5M | $1M+ | SH |
| ACADIAN ASSET MANAGEMENT LLC | 4.4M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 4.2M | $1M+ | SH |
| PERCEPTIVE ADVISORS LLC | 3.1M | $1M+ | SH |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 2.2M | $1M+ | SH |
| SILVERARC CAPITAL MANAGEMENT, LLC | 2.1M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.7M | $1M+ | SH |
| MB Generational Wealth, LLC | 1.6M | $1M+ | SH |
| UBS Group AG | 1.6M | $1M+ | SH |
| BALYASNY ASSET MANAGEMENT L.P. | 1.5M | $1M+ | SH |
| VANGUARD GROUP INC | 1.4M | $1M+ | SH |
| AQR CAPITAL MANAGEMENT LLC | 1.1M | $1M+ | SH |
| Walleye Capital LLC | 1.1M | $1M+ | SH |
| Monashee Investment Management LLC | 1.0M | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G · Mar 2, 2026
5.2%
12.3M shares
Growth Equity Opportunities 18 VGE, LLC
SC 13D/A · Feb 25, 2026
1.7%
4.1M shares
SC 13G/A · Jan 21, 2026
6.5%
15.1M shares
SC 13G · Jul 29, 2025
5.0%
11.4M shares
SC 13G · Jul 17, 2025
5.3%
12.1M shares
SC 13G/A · Feb 12, 2025
2.8%
6.3M shares
SC 13G · Feb 5, 2025
8.6%
19.6M shares
SC 13G/A · Jan 31, 2025
4.4%
10.0M shares
SC 13G/A · Nov 12, 2024
5.9%
1.3B shares
SC 13G/A · Nov 12, 2024
3.5%
7.9M shares
SC 13G/A · Aug 2, 2024
6.3%
14.4M shares
Hillhouse Investment Management, Ltd.
SC 13G/A · Feb 14, 2024
2.2%
5.0M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
5.2%
11.6M shares
SC 13G · Jan 11, 2024
5.8%
13.1M shares
SC 13G/A · Jan 11, 2024
1.9%
4.2M shares
Growth Equity Opportunities 18 VGE, LLC
SC 13D · Jul 28, 2023
8.2%
18.8M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G/A · May 10, 2023
1.4%
0 shares
SC 13G/A · May 5, 2023
4.9%
4.7M shares
SC 13G/A · Feb 14, 2023
5.3%
5.0M shares
SC 13G/A · Feb 1, 2023
5.7%
5.4M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G · Jan 10, 2023
29.5%
0 shares
SC 13G · Jan 4, 2023
5.1%
4.8M shares
SC 13G · Dec 20, 2022
3.6%
3.4M shares