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Gossamer Bio Inc
GOSSAdd to Watchlist
10.730USD
-1.210-10.13%
Close 09-18 16:00（ET）
5.29BMarket Cap
LossP/E TTM
After-hours 16:00 (ET)10.865USD-0.015-0.14%
After-hours 16:00 (ET)Shareholding Stats
Updated: Sun, May 10
Updated: Sun, May 10
Shareholders
Shareholder Types
Shareholders
Shareholders
Proportion
BlackRock Institutional Trust Company, N.A.
6.16%
Octagon Capital Advisors LP
5.93%
Vanguard Capital Management, LLC
4.00%
State Street Investment Management (US)
3.97%
ARCH Venture Partners
3.43%
Other
76.51%
Shareholders
Shareholders
Proportion
BlackRock Institutional Trust Company, N.A.
6.16%
Octagon Capital Advisors LP
5.93%
Vanguard Capital Management, LLC
4.00%
State Street Investment Management (US)
3.97%
ARCH Venture Partners
3.43%
Other
76.51%
Shareholder Types
Shareholders
Proportion
Investment Advisor
23.73%
Hedge Fund
23.18%
Investment Advisor/Hedge Fund
15.83%
Venture Capital
7.13%
Corporation
2.67%
Research Firm
2.10%
Private Equity
1.34%
Individual Investor
0.86%
Bank and Trust
0.13%
Other
23.03%
Institutional Shareholding
Updated: Wed, Apr 1
Updated: Wed, Apr 1
Reporting Period
No. of institutions
Shares Held
Proportion
Change
2026Q1
330
172.23M
73.39%
-45.14M
2025Q4
301
181.91M
78.59%
-39.01M
2025Q3
269
178.21M
76.99%
-56.62M
2025Q2
264
183.64M
80.76%
-59.32M
2025Q1
285
180.17M
79.28%
-64.51M
2024Q4
310
181.35M
80.03%
-59.94M
2024Q3
354
184.99M
81.77%
-80.44M
2024Q2
354
192.00M
84.87%
-65.92M
2024Q1
360
205.91M
94.29%
-56.87M
2023Q4
359
215.74M
99.04%
-22.98M
View more
Shareholder Activity
Name
Shares Held
Proportion
Change
Chg %
Date
BlackRock Institutional Trust Company, N.A.
14.45M
6.24%
+1.91M
+15.27%
Dec 31, 2025
Octagon Capital Advisors LP
13.92M
6.01%
-3.13M
-18.38%
Dec 31, 2025
State Street Investment Management (US)
9.31M
4.02%
+5.43M
+139.75%
Dec 31, 2025
ARCH Venture Partners
8.06M
3.48%
--
--
Dec 31, 2025
Samsara BioCapital, LLC
7.22M
3.12%
+1.09M
+17.82%
Dec 31, 2025
Two Sigma Investments, LP
6.02M
2.6%
+1.85M
+44.26%
Dec 31, 2025
Hasnain's family
5.41M
2.34%
+372.00K
+7.39%
Apr 28, 2025
Invus Public Equities Advisors, LLC
5.21M
2.25%
--
--
Dec 31, 2025
683 Capital Management LLC
5.00M
2.16%
-3.00M
-37.50%
Mar 24, 2026
View more
ETF Market
Updated: Sat, Dec 6
Updated: Sat, Dec 6
Name
Proportion
ALPS Medical Breakthroughs ETF
0.21%
Vanguard US Momentum Factor ETF
0.09%
iShares Micro-Cap ETF
0.09%
iShares Russell 2000 Growth ETF
0.03%
Invesco Russell 2000 Dynamic Multifactor ETF
0.03%
Invesco RAFI US 1500 Small-Mid ETF
0.03%
Proshares Ultra Russell 2000
0.02%
ProShares UltraPro Russell2000
0.02%
ProShares Hedge Replication ETF
0.02%
iShares Russell 2000 ETF
0.02%
View more
ALPS Medical Breakthroughs ETF
Proportion0.21%
Vanguard US Momentum Factor ETF
Proportion0.09%
iShares Micro-Cap ETF
Proportion0.09%
iShares Russell 2000 Growth ETF
Proportion0.03%
Invesco Russell 2000 Dynamic Multifactor ETF
Proportion0.03%
Invesco RAFI US 1500 Small-Mid ETF
Proportion0.03%
Proshares Ultra Russell 2000
Proportion0.02%
ProShares UltraPro Russell2000
Proportion0.02%
ProShares Hedge Replication ETF
Proportion0.02%
iShares Russell 2000 ETF
Proportion0.02%