Gossamer Bio, Inc. (GOSS) — Institutional Holders, Q2 2026
173 institutional investment managers reported a GOSS position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $64.2M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
GOSS in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- D. E. ShawAdded · +40,180,423 sh+$6.6M
- DeepCurrents Investment GroupNew · +37,665,073 sh+$6.2M
- 683 Capital ManagementAdded · +29,198,868 sh+$4.8M
- WOLVERINE ASSET MANAGEMENTNew · +12,894,746 sh+$2.1M
- RENAISSANCE TECHNOLOGIESAdded · +9,194,160 sh+$1.5M
Biggest sellers
- BlackRockTrimmed · -25,983,447 sh-$4.3M
- BALYASNY ASSET MANAGEMENT L.P.Trimmed · -11,740,364 sh-$1.9M
- VANGUARD CAPITAL MANAGEMENTTrimmed · -9,373,163 sh-$1.5M
- ACADIAN ASSET MANAGEMENTTrimmed · -8,763,673 sh-$1.4M
- ARCH Venture ManagementTrimmed · -8,055,916 sh-$1.3M
GOSS 13F holders ranked 1–100 of 173
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | TANG CAPITAL MANAGEMENT#1 · 17,841,000 sh | 17,841,000 | $11.5M | 0.52% | New |
| 2 | D. E. Shaw#2 · 40,959,285 sh | 40,959,285 | $6.7M | <0.01% | +33.5% |
| 3 | 683 Capital Management#3 · 39,198,868 sh | 39,198,868 | $6.5M | 0.32% | +19.2% |
| 4 | DeepCurrents Investment Group#4 · 37,665,073 sh | 37,665,073 | $6.0M | 0.18% | +26.1% |
| 5 | AQR CAPITAL MANAGEMENT#5 · 15,629,993 sh | 15,629,993 | $2.6M | <0.01% | +54.3% |
| 6 | GSA CAPITAL PARTNERS LLP#6 · 14,986,947 sh | 14,986,947 | $2.5M | 0.16% | +360.5% |
| 7 | WOLVERINE ASSET MANAGEMENT#7 · 12,894,746 sh | 12,894,746 | $2.1M | 0.02% | -41.4% |
| 8 | RENAISSANCE TECHNOLOGIES#8 · 11,629,896 sh | 11,629,896 | $1.9M | <0.01% | +854.9% |
| 9 | Kalehua Capital Management#9 · 11,149,363 sh | 11,149,363 | $1.8M | 1.32% | +49.2% |
| 10 | VANGUARD CAPITAL MANAGEMENT#10 · 9,416,023 sh | 9,416,023 | $1.6M | 0.00% | +0.2% |
| 11 | ARCH Venture Management#11 · 8,055,916 sh | 8,055,916 | $1.3M | 0.12% | 0.0% |
| 12 | BARCLAYS PLC#12 · 7,832,522 sh | 7,832,522 | $1.3M | <0.01% | +155.5% |
| 13 | Octagon Capital Advisors#13 · 7,750,000 sh | 7,750,000 | $1.3M | 0.11% | 0.0% |
| 14 | BlackRock#14 · 7,669,943 sh | 7,669,943 | $1.3M | 0.00% | -54.4% |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#15 · 7,573,388 sh | 7,573,388 | $1.2M | <0.01% | New |
| 16 | TWO SIGMA INVESTMENTS#16 · 7,432,001 sh | 7,432,001 | $1.2M | <0.01% | +55.5% |
| 17 | Samsara BioCapital#17 · 7,222,559 sh | 7,222,559 | $1.2M | 0.10% | 0.0% |
| 18 | Qube Research & Technologies Ltd#18 · 7,065,756 sh | 7,065,756 | $1.2M | <0.01% | +43.7% |
| 19 | Corient Private Wealth#19 · 5,632,698 sh | 5,632,698 | $927.1K | <0.01% | +41.3% |
| 20 | Siren, L.L.C.#20 · 5,208,968 sh | 5,208,968 | $857.4K | 0.02% | 0.0% |
| 21 | Hillhouse Capital Advisors, Ltd.#21 · 4,974,041 sh | 4,974,041 | $818.7K | 0.10% | 0.0% |
| 22 | Murchinson Ltd.#22 · 1,000,000 sh | 1,000,000 | $642.8K | 0.09% | New |
| 23 | UBS Group AG#23 · 3,093,785 sh | 3,093,785 | $510.5K | <0.01% | -81.0% |
| 24 | Squarepoint Ops#24 · 2,556,378 sh | 2,556,378 | $420.8K | <0.01% | -24.8% |
| 25 | GEODE CAPITAL MANAGEMENT#25 · 2,481,605 sh | 2,481,605 | $408.7K | 0.00% | -49.8% |
| 26 | MILLENNIUM MANAGEMENT#26 · 2,402,633 sh | 2,402,633 | $395.5K | <0.01% | +1182.0% |
| 27 | MB Generational Wealth#27 · 2,217,451 sh | 2,217,451 | $365.0K | 0.18% | +44.7% |
| 28 | JACOBS LEVY EQUITY MANAGEMENT#28 · 2,187,402 sh | 2,187,402 | $360.0K | <0.01% | +29.0% |
| 29 | MARSHALL WACE, LLP#29 · 2,114,988 sh | 2,114,988 | $338.4K | <0.01% | New |
| 30 | Alyeska Investment Group, L.P.#30 · 2,051,442 sh | 2,051,442 | $337.7K | <0.01% | 0.0% |
| 31 | ACADIAN ASSET MANAGEMENT#31 · 1,792,135 sh | 1,792,135 | $293.0K | <0.01% | -66.0% |
| 32 | HSBC PLC#32 · 1,583,118 sh | 1,583,118 | $267.4K | <0.01% | +1289.4% |
| 33 | Ensign Peak Advisors#33 · 1,450,979 sh | 1,450,979 | $238.8K | <0.01% | -14.8% |
| 34 | VANGUARD FIDUCIARY#34 · 1,245,392 sh | 1,245,392 | $205.5K | 0.00% | -11.3% |
| 35 | JPMORGAN CHASE#35 · 1,228,634 sh | 1,228,634 | $201.5K | 0.00% | +1225.5% |
| 36 | DEUTSCHE BANK AG\#36 · 1,106,441 sh | 1,106,441 | $188.1K | <0.01% | -15.3% |
| 37 | GOLDMAN SACHS GROUP#37 · 1,128,451 sh | 1,128,451 | $185.7K | 0.00% | -4.4% |
| 38 | STATE STREET#38 · 1,114,718 sh | 1,114,718 | $183.5K | 0.00% | -74.6% |
| 39 | Hennion & Walsh Asset Management#39 · 1,098,914 sh | 1,098,914 | $180.9K | — | +32.6% |
| 40 | BOOTHBAY FUND MANAGEMENT#40 · 276,000 sh | 276,000 | $177.4K | <0.01% | New |
| 41 | NEA Management Company#41 · 1,000,000 sh | 1,000,000 | $164.6K | 0.01% | 0.0% |
| 42 | CHARLES SCHWAB INVESTMENT MANAGEMENT#42 · 992,527 sh | 992,527 | $163.4K | 0.00% | -34.3% |
| 43 | SMITH, MOORE#43 · 900,000 sh | 900,000 | $148.1K | <0.01% | +91.5% |
| 44 | Ishara Investments#44 · 820,000 sh | 820,000 | $135.0K | 0.10% | 0.0% |
| 45 | PANAGORA ASSET MANAGEMENT#45 · 733,216 sh | 733,216 | $120.7K | <0.01% | +56.0% |
| 46 | Mariner#46 · 594,719 sh | 594,719 | $97.9K | <0.01% | +42.1% |
| 47 | IEQ CAPITAL#47 · 591,254 sh | 591,254 | $97.3K | <0.01% | +50.2% |
| 48 | VANGUARD PORTFOLIO MANAGEMENT#48 · 544,212 sh | 544,212 | $89.8K | 0.00% | -74.8% |
| 49 | CHOREO#49 · 540,111 sh | 540,111 | $88.9K | <0.01% | +115.9% |
| 50 | TUDOR INVESTMENT ET AL#50 · 479,581 sh | 479,581 | $78.9K | <0.01% | +316.2% |
| 51 | Virtu Financial#51 · 463,708 sh | 463,708 | $76.0K | <0.01% | +76.2% |
| 52 | NORTHERN#52 · 458,498 sh | 458,498 | $75.5K | 0.00% | -67.5% |
| 53 | Invesco Ltd.#53 · 442,268 sh | 442,268 | $72.8K | 0.00% | -4.9% |
| 54 | BANK OF AMERICA#54 · 396,727 sh | 396,727 | $65.1K | 0.00% | -87.5% |
| 55 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#55 · 383,049 sh | 383,049 | $63.0K | 0.00% | +182.1% |
| 56 | LPL Financial#56 · 332,534 sh | 332,534 | $54.7K | 0.00% | -10.5% |
| 57 | MERCER GLOBAL ADVISORS#57 · 297,863 sh | 297,863 | $49.0K | <0.01% | +57.3% |
| 58 | WADDELL & ASSOCIATES#58 · 261,798 sh | 261,798 | $43.1K | <0.01% | +287.6% |
| 59 | MORGAN STANLEY#59 · 241,591 sh | 241,591 | $39.8K | 0.00% | -34.2% |
| 60 | PRUDENTIAL FINANCIAL#60 · 227,550 sh | 227,550 | $37.5K | 0.00% | +306.9% |
| 61 | ADAR1 Capital Management#61 · 212,531 sh | 212,531 | $35.0K | <0.01% | -26.1% |
| 62 | Creative Planning#62 · 211,955 sh | 211,955 | $34.9K | 0.00% | +68.7% |
| 63 | Merit Financial Group#63 · 169,596 sh | 169,596 | $27.9K | <0.01% | +9.8% |
| 64 | EVENTIDE ASSET MANAGEMENT#64 · 163,440 sh | 163,440 | $26.8K | <0.01% | New |
| 65 | Cerity Partners#65 · 160,399 sh | 160,399 | $26.4K | 0.00% | +50.6% |
| 66 | Sivia Capital Partners#66 · 152,298 sh | 152,298 | $25.1K | <0.01% | +66.1% |
| 67 | SG Americas Securities#67 · 146,737 sh | 146,737 | $24.0K | 0.00% | +14.1% |
| 68 | Tower Research Capital (TRC)#68 · 144,473 sh | 144,473 | $23.8K | <0.01% | +297.5% |
| 69 | HighTower Advisors#69 · 144,358 sh | 144,358 | $23.8K | 0.00% | +120.0% |
| 70 | WEALTH ENHANCEMENT ADVISORY SERVICES#70 · 153,902 sh | 153,902 | $22.0K | — | +48.8% |
| 71 | Schonfeld Strategic Advisors#71 · 132,888 sh | 132,888 | $21.9K | <0.01% | New |
| 72 | FMR#72 · 130,325 sh | 130,325 | $21.5K | 0.00% | +478.8% |
| 73 | Russell Investments Group, Ltd.#73 · 121,039 sh | 121,039 | $19.9K | 0.00% | -16.7% |
| 74 | OSAIC#74 · 120,204 sh | 120,204 | $19.2K | 0.00% | +8843.8% |
| 75 | GROUP ONE TRADING, L.P.#75 · 110,927 sh | 110,927 | $18.3K | 0.00% | +32.7% |
| 76 | SRS Capital Advisors#76 · 108,204 sh | 108,204 | $17.8K | <0.01% | New |
| 77 | BCV Asset Management#77 · 106,500 sh | 106,500 | $17.5K | <0.01% | 0.0% |
| 78 | Rockefeller Capital Management L.P.#78 · 105,866 sh | 105,866 | $17.4K | 0.00% | -1.6% |
| 79 | BALYASNY ASSET MANAGEMENT L.P.#79 · 104,232 sh | 104,232 | $17.2K | 0.00% | -98.2% |
| 80 | COMMONWEALTH EQUITY SERVICES#80 · 101,993 sh | 101,993 | $16.8K | 0.00% | -7.3% |
| 81 | Quarry#81 · 100,000 sh | 100,000 | $16.5K | <0.01% | 0.0% |
| 82 | Focus Partners Wealth#82 · 92,848 sh | 92,848 | $15.3K | 0.00% | +27.2% |
| 83 | RHUMBLINE ADVISERS#83 · 88,599 sh | 88,599 | $14.6K | 0.00% | -59.1% |
| 84 | CAPTRUST FINANCIAL ADVISORS#84 · 81,778 sh | 81,778 | $13.5K | 0.00% | +42.2% |
| 85 | Vanguard Global Advisers#85 · 79,682 sh | 79,682 | $13.1K | 0.00% | 0.0% |
| 86 | BNP PARIBAS FINANCIAL MARKETS#86 · 73,693 sh | 73,693 | $12.1K | 0.00% | -22.9% |
| 87 | Caprock Group#87 · 70,000 sh | 70,000 | $11.5K | <0.01% | 0.0% |
| 88 | Velan Capital Investment Management#88 · 70,000 sh | 70,000 | $11.5K | <0.01% | 0.0% |
| 89 | AlphaCore Capital#89 · 69,482 sh | 69,482 | $11.4K | <0.01% | +31.1% |
| 90 | Bronte Capital Management Pty Ltd.#90 · 67,754 sh | 67,754 | $11.2K | <0.01% | New |
| 91 | TWO SIGMA SECURITIES#91 · 58,064 sh | 58,064 | $9.6K | <0.01% | New |
| 92 | Integrated Wealth Concepts#92 · 55,533 sh | 55,533 | $9.1K | 0.00% | +285.0% |
| 93 | Bull Harbor Capital#93 · 51,235 sh | 51,235 | $8.4K | <0.01% | +64.2% |
| 94 | Beacon Pointe Advisors#94 · 48,000 sh | 48,000 | $7.9K | 0.00% | +71.4% |
| 95 | Bank of New York Mellon#95 · 45,713 sh | 45,713 | $7.5K | 0.00% | -89.3% |
| 96 | Y-Intercept (Hong Kong) Ltd#96 · 43,210 sh | 43,210 | $7.1K | — | New |
| 97 | Cambridge Investment Research Advisors#97 · 42,800 sh | 42,800 | $7.0K | 0.00% | 0.0% |
| 98 | Prospera Financial Services#98 · 42,123 sh | 42,123 | $6.9K | <0.01% | New |
| 99 | Skaana Management L.P.#99 · 40,200 sh | 40,200 | $6.6K | <0.01% | 0.0% |
| 100 | RMB Capital Management#100 · 39,784 sh | 39,784 | $6.5K | <0.01% | +6.8% |
Funds that sold out of GOSS in Q2 2026 (42)
Held GOSS at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.