Security key
38341P102
Gossamer Bio, Inc. - Common Stock, par value $0.0001 per share (GOSS)
CUSIP: 38341P102
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 169,611,670
- Total 13F value
- $55,722,046
- Share change
- -15,373,639
- Put/Call ratio
- 18%
- SEC-reported price per share
- $0.33
- Number of holders
- 183
- Value change
- -$77,463,265
- Number of buys
- 112
- Number of sells
- 101
- Shares outstanding
- 489,069,902
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
183
Top holders
10
GOSS full security history
Ownership snapshot
Full 13F holder table
Gossamer Bio, Inc. SEC filings
Gossamer Bio, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of GOSS - Gossamer Bio, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Octagon Capital Advisors LP
Disclosed value leader
NEA Management Company, LLC
Comparable rows
15/15
Latest evidence
23 Feb 2026
13F
13D/G
Lead comparable stake: 3.8%
13D/G row: Octagon Capital Advisors LP
Showing 1-6 of 15 holder rows.
Quick read
Octagon Capital Advisors LP leads the comparable SEC ownership view at 3.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Octagon Capital Advisors LP's linked filing trail.
Comparable ownership
Top 5
Octagon Capital Advisors LP
3.8%
Invus Global Management, LLC
2.8%
Growth Equity Opportunities 18 VG...
1.7%
NEA Management Company, LLC
3.7%
BlackRock, Inc.
3.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Octagon Capital Advisors LP |
13F
13D/G
Company
|
3.8%
from 13D/G
|
$43,137,650
13,915,371 shares
|
— | 31 Dec 2025 |
| Invus Global Management, LLC |
13D/G
Invus Public Equities, L.P.
|
2.8%
|
$5,507,814
6,258,880 shares
|
$0 | 31 Dec 2024 |
| Growth Equity Opportunities 18 VGE, LLC |
13D/G
|
1.7%
|
$10,366,092
4,065,134 shares
|
$0 | 23 Feb 2026 |
| NEA Management Company, LLC |
13F
Company
|
3.7%
|
$56,088,405
18,093,034 shares
|
— | 31 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
3.5%
|
$52,876,322
17,056,878 shares
|
— | 31 Dec 2025 |
| VANGUARD GROUP INC |
13F
Company
|
2.6%
|
$39,906,948
12,873,209 shares
|
— | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
183
Shares
169,611,670
Rows available
183
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
183
Q1 2026 holders
183
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|