Security key
38341P102
Gossamer Bio, Inc. - Common Stock, par value $0.0001 per share (GOSS)
CUSIP: 38341P102
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 31,381,348
- Total 13F value
- $5,162,200
- Share change
- +29,452,235
- SEC-reported price per share
- $0.16
- Number of holders
- 35
- Value change
- +$4,825,025
- Number of buys
- 16
- Number of sells
- 15
- Shares outstanding
- 489,069,902
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
35
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
683 Capital Management, LLC
Disclosed value leader
683 Capital Management, LLC
Comparable rows
15/15
Latest evidence
04 Jun 2026
13D/G
13F
Lead comparable stake: 10%
13D/G row: 683 Capital Management, LLC
Showing 1-6 of 15 holder rows.
Quick read
683 Capital Management, LLC leads the comparable SEC ownership view at 10%.
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 683 Capital Management, LLC's linked filing trail.
Comparable ownership
Top 5
683 Capital Management, LLC
10%
Context Capital Management, LLC
9.9%
DeepCurrents Investment Group LLC
7.7%
Octagon Capital Advisors LP
3.8%
Invus Global Management, LLC
2.8%
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 |
|---|---|---|---|---|---|
| 683 Capital Management, LLC |
13D/G
13F
Company
|
10%
|
$16,955,314
49,868,571 shares
|
+$13,782,671 | 04 Jun 2026 |
| Context Capital Management, LLC |
13D/G
|
9.9%
|
$16,604,168
48,835,788 shares
|
$0 | 04 Jun 2026 |
| DeepCurrents Investment Group LLC |
13D/G
|
7.7%
|
$12,806,125
37,665,073 shares
|
$0 | 04 Jun 2026 |
| Octagon Capital Advisors LP |
13D/G
13F
Company
|
3.8%
|
$3,590,422
8,976,054 shares
|
-$2,466,148 | 31 Mar 2026 |
| 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 |
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 Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
35
Shares
31,381,348
Rows available
35
| 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 Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
182
Q2 2026 holders
35
Holder diff
-147
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|