GOSSAMER BIO INC (GOSS) Institutional Shareholders
GOSSAMER BIO INC (GOSS) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $61.19M in GOSS holdings during the latest filing period.
D. E. Shaw & Co., Inc. is currently the largest disclosed institutional shareholder of GOSS tracked by InsiderSet, reporting ownership valued at approximately $6.74M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $489.05M, representing an estimated gain of +7153.95% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 64% of the total disclosed GOSS value among the investors covered in this analysis. Major shareholders include D. E. Shaw & Co., Inc., 683 Capital Management, Llc, Deepcurrents Investment Group Llc, and several other long-term asset managers with concentrated positions in GOSSAMER BIO INC (GOSS).
This page ranks the largest institutional GOSS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
165
Total Reported Value
$61.19M
Largest Holder
D. E. Shaw & Co., Inc.
Largest Position
$6.74M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
78
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| D. E. Shaw & Co., Inc. | 0.00% | 40,959,285 | $6,741,898 | $489,053,863 | +$482,311,965 | +7153.95% | |
| 683 Capital Management, Llc | 0.59% | 39,198,868 | $6,452,134 | $468,034,484 | +$461,582,350 | +7153.95% | |
| Deepcurrents Investment Group Llc | 0.21% | 37,665,073 | $6,026,411 | $449,720,972 | +$443,694,561 | +7362.50% | |
| Context Capital Management, Llc | 0.10% | 28,946,459 | $4,764,587 | $345,620,720 | +$340,856,133 | +7153.95% | |
| Worth Venture Partners, Llc | 9.29% | 25,017,881 | $4,117,943 | $298,713,499 | +$294,595,556 | +7153.95% | |
| Aqr Capital Management Llc | 0.00% | 15,629,993 | $2,572,697 | $186,622,116 | +$184,049,419 | +7153.95% | |
| Gsa Capital Partners Llp | 0.16% | 14,986,947 | $2,467,000 | $178,944,147 | +$176,477,147 | +7153.51% | |
| Wolverine Asset Management Llc | 0.03% | 12,894,746 | $2,122,475 | $153,963,267 | +$151,840,792 | +7153.95% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 11,629,896 | $1,914,281 | $138,860,958 | +$136,946,677 | +7153.95% |
| Kalehua Capital Management Llc | 1.05% | 11,149,363 | $1,835,185 | $133,123,394 | +$131,288,209 | +7153.95% | |
| Vanguard Capital Management Llc | 0.00% | 9,416,023 | $1,553,644 | $112,427,315 | +$110,873,671 | +7136.36% | |
| Arch Venture Management, Llc | 0.12% | 8,055,916 | $1,326,004 | $96,187,637 | +$94,861,633 | +7153.95% | |
| Barclays Plc | 0.00% | 7,832,522 | $1,289,233 | $93,520,313 | +$92,231,080 | +7153.95% | |
| Octagon Capital Advisors Lp | 0.12% | 7,750,000 | $1,275,650 | $92,535,000 | +$91,259,350 | +7153.95% | |
| Blackrock, Inc. | 0.00% | 7,669,943 | $1,262,473 | $91,579,119 | +$90,316,646 | +7153.95% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 7,573,388 | $1,246,580 | $90,426,253 | +$89,179,673 | +7153.95% | |
| Two Sigma Investments, Lp | 0.00% | 7,432,001 | $1,223,307 | $88,738,092 | +$87,514,785 | +7153.95% | |
| Samsara Biocapital, Llc | 0.10% | 7,222,559 | $1,188,833 | $86,237,354 | +$85,048,521 | +7153.95% | |
| Qube Research & Technologies Ltd | 0.00% | 7,065,756 | $1,163,023 | $84,365,127 | +$83,202,104 | +7153.95% | |
| Corient Private Wealth Llc | 0.00% | 5,632,698 | $927,142 | $67,254,414 | +$66,327,272 | +7153.95% | |
| Siren, L.L.C. | 0.02% | 5,208,968 | $857,396 | $62,195,078 | +$61,337,682 | +7153.95% | |
| Hhlr Advisors, Ltd. | 0.10% | 4,974,041 | $818,727 | $59,390,050 | +$58,571,323 | +7153.95% | |
| Ensign Peak Advisors, Inc | 0.00% | 1,702,125 | $559,148 | $20,323,373 | +$19,764,225 | +3534.70% | |
| Ubs Group Ag | 0.00% | 3,093,785 | $510,474 | $36,939,793 | +$36,429,319 | +7136.37% | |
| Squarepoint Ops Llc | 0.00% | 2,556,378 | $420,780 | $30,523,153 | +$30,102,373 | +7153.95% | |
| Geode Capital Management, Llc | 0.00% | 2,481,605 | $408,706 | $29,630,364 | +$29,221,658 | +7149.80% | |
| Millennium Management Llc | 0.00% | 2,402,633 | $395,473 | $28,687,438 | +$28,291,965 | +7153.96% | |
| Mb Generational Wealth, Llc | 0.18% | 2,217,451 | $364,992 | $26,476,365 | +$26,111,373 | +7153.96% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 2,187,402 | $360,046 | $26,117,580 | +$25,757,534 | +7153.96% | |
| Marshall Wace, Llp | 0.00% | 2,114,988 | $338,399 | $25,252,957 | +$24,914,558 | +7362.48% | |
| Alyeska Investment Group, L.P. | 0.00% | 2,051,442 | $337,667 | $24,494,217 | +$24,156,550 | +7153.96% | |
| Acadian Asset Management Llc | 0.00% | 1,792,135 | $293,000 | $21,398,092 | +$21,105,092 | +7203.10% | |
| Hsbc Holdings Plc | 0.00% | 1,583,118 | $267,389 | $18,902,429 | +$18,635,040 | +6969.26% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,245,392 | $205,490 | $14,869,980 | +$14,664,490 | +7136.35% | |
| Jpmorgan Chase & Co | 0.00% | 1,228,634 | $201,495 | $14,669,890 | +$14,468,395 | +7180.52% | |
| Deutsche Bank Ag\ | 0.00% | 1,106,441 | $188,095 | $13,210,906 | +$13,022,811 | +6923.53% | |
| Goldman Sachs Group Inc | 0.00% | 1,128,451 | $185,743 | $13,473,705 | +$13,287,962 | +7153.95% | |
| State Street Corp | 0.00% | 1,114,718 | $183,483 | $13,309,733 | +$13,126,250 | +7153.93% | |
| Hennion & Walsh Asset Management, Inc. | 0.01% | 1,098,914 | $180,881 | $13,121,033 | +$12,940,152 | +7153.96% | |
| Nea Management Company, Llc | 0.01% | 1,000,000 | $164,600 | $11,940,000 | +$11,775,400 | +7153.95% | |
| Charles Schwab Investment Management Inc | 0.00% | 992,527 | $163,370 | $11,850,772 | +$11,687,402 | +7153.95% | |
| Smith, Moore & Co. | 0.01% | 900,000 | $148,140 | $10,746,000 | +$10,597,860 | +7153.95% | |
| Ishara Investments Lp | 0.10% | 820,000 | $134,972 | $9,790,800 | +$9,655,828 | +7153.95% | |
| Panagora Asset Management Inc | 0.00% | 733,216 | $120,687 | $8,754,599 | +$8,633,912 | +7153.97% | |
| Cwm, Llc | 0.00% | 319,995 | $105,118 | $3,820,740 | +$3,715,622 | +3534.72% | |
| Mariner, Llc | 0.00% | 594,719 | $97,889 | $7,100,945 | +$7,003,056 | +7154.08% | |
| Ieq Capital, Llc | 0.00% | 591,254 | $97,321 | $7,059,573 | +$6,962,252 | +7153.90% | |
| Vanguard Portfolio Management Llc | 0.00% | 544,212 | $89,795 | $6,497,891 | +$6,408,096 | +7136.36% | |
| Choreo, Llc | 0.00% | 540,111 | $88,902 | $6,448,925 | +$6,360,023 | +7153.97% | |
| Tudor Investment Corp Et Al | 0.00% | 479,581 | $78,939 | $5,726,197 | +$5,647,258 | +7153.95% |
Frequently asked questions about GOSS
Who owns the most GOSS stock?
The largest holders of GOSS are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for GOSSAMER BIO INC (GOSS).
Is GOSS widely held by superinvestors?
Many widely followed stocks like GOSS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly GOSS is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.