ABIVAX SA (ABVX)
Institutional ownership reported to the SEC as of Q2 2026, across 11 quarters.
300
Reporting holders
$8.8B
Reported value
69.4%
Of shares outstanding
19.5%
Held as options
+55
Holder change
Institutions report 54,505,118 shares against 78,536,412 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Share count carried from an earlier filing (concept 2025-12-31).
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| TCG Crossover Management, LLC | $800.6M | 6,007,834 | 19.24% | 11q | -7.3%-$63.1M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $619.4M | 1,053,896 | 0.05% | 4q | +176.4%+$395.3M |
| CITADEL ADVISORS LLC | $565.5M | 1,438,352 | 0.06% | 11q | +164.2%+$351.5M |
| Helikon Investments Ltd | $371.4M | 2,787,131 | 11.10% | 2q | +175.0%+$236.4M |
| Darwin Global Management, Ltd. | $348.2M | 3,621,583 | 9.26% | 4q | +4.4%+$14.7M |
| Vestal Point Capital, LP | $313.1M | 2,349,443 | 7.32% | 4q | +56.6%+$113.2M |
| Jupiter Topco LLC | $255.1M | 1,913,933 | 0.10% | new | FIRST |
| UBS Group AG | $247.9M | 1,844,918 | 0.03% | 8q | -59.4%-$363.2M |
| ADAR1 Capital Management, LLC | $246.4M | 1,804,703 | 11.28% | 10q | +29.5%+$56.1M |
| Caligan Partners LP | $207.6M | 1,557,924 | 9.77% | 7q | +6.6%+$12.8M |
| MORGAN STANLEY | $190.9M | 1,432,185 | 0.01% | 11q | -16.0%-$36.3M |
| WESTFIELD CAPITAL MANAGEMENT CO LP | $174.5M | 1,309,825 | 0.57% | 3q | -1.0%-$1.7M |
| RA CAPITAL MANAGEMENT, L.P. | $150.9M | 1,132,557 | 1.31% | new | NEW |
| NORGES BANK | $146.6M | 1,100,000 | 0.01% | new | NEW |
| Logos Global Management LP | $136.5M | 1,024,000 | 5.87% | 4q | +51.7%+$46.5M |
| Octagon Capital Advisors LP | $132.3M | 993,000 | 11.89% | 6q | +46.7%+$42.1M |
| BANK OF AMERICA CORP /DE/ | $129.5M | 971,439 | 0.01% | 10q | +32.0%+$31.4M |
| Ikarian Capital, LLC | $122.1M | 328,635 | 13.16% | 4q | +470.2%+$100.7M |
| Eversept Partners, LP | $121.8M | 913,880 | 6.32% | 4q | -2.2%-$2.7M |
| GOLDMAN SACHS GROUP INC | $105.6M | 792,712 | 0.01% | 4q | +127.3%+$59.2M |
| Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | $102.0M | 765,332 | 5.59% | 4q | HELD |
| DIADEMA PARTNERS LP | $101.8M | 163,644 | 12.86% | 4q | +115.5%+$54.5M |
| BOOTHBAY FUND MANAGEMENT, LLC | $99.7M | 563,367 | 1.31% | 7q | +19.1%+$16.0M |
| ORBIMED ADVISORS LLC | $99.5M | 546,522 | 1.84% | 4q | +17.4%+$14.7M |
| LMR Partners LLP | $94.8M | 15,357 | 0.35% | 4q | -79.9%-$377.9M |
| Cormorant Asset Management, LP | $90.0M | 675,000 | 4.61% | 11q | -11.2%-$11.3M |
| ExodusPoint Capital Management, LP | $83.9M | 31,209 | 0.54% | 3q | -77.7%-$293.1M |
| Balyasny Asset Management L.P. | $83.2M | 603,840 | 0.10% | 4q | +182.6%+$53.8M |
| IMC-Chicago, LLC | $80.7M | 87,392 | 0.02% | 3q | -17.7%-$17.3M |
| Boxer Capital Management, LLC | $80.6M | 605,000 | 6.07% | 4q | +202.5%+$54.0M |
| GREAT POINT PARTNERS LLC | $80.5M | 204,314 | 15.22% | new | NEW |
| GROUP ONE TRADING LLC | $78.5M | 29,767 | 0.11% | 4q | -16.8%-$15.8M |
| Siren, L.L.C. | $76.8M | 576,000 | 1.55% | new | NEW |
| BlackRock, Inc. | $76.5M | 574,061 | 0.00% | 3q | +34.3%+$19.6M |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $76.0M | 410,000 | 1.34% | new | NEW |
| TUDOR INVESTMENT CORP ET AL | $70.0M | 187,335 | 0.10% | 4q | +84.4%+$32.0M |
| Aberdeen Group plc | $69.6M | 522,025 | 0.10% | 9q | +21.1%+$12.1M |
| Saturn V Capital Management LP | $69.1M | 518,865 | 9.91% | 10q | -4.4%-$3.2M |
| Artia Global Partners LP | $68.8M | 516,447 | 12.70% | 4q | -14.0%-$11.2M |
| Two Seas Capital LP | $68.1M | 244,590 | 1.35% | new | NEW |
| Ensign Peak Advisors, Inc | $67.2M | 504,471 | 0.11% | 6q | -60.1%-$101.2M |
| Pictet Asset Management Holding SA | $65.6M | 492,068 | 0.06% | 4q | +375.2%+$51.8M |
| First Turn Management, LLC | $65.3M | 489,889 | 6.98% | 4q | +5.2%+$3.2M |
| Verition Fund Management LLC | $59.1M | 211,582 | 0.15% | 4q | +715.4%+$51.9M |
| Holocene Advisors, LP | $55.8M | 418,657 | 0.13% | 4q | +61.9%+$21.3M |
| Vivo Capital, LLC | $55.3M | 414,899 | 5.05% | 4q | +73.2%+$23.4M |
| EVENTIDE ASSET MANAGEMENT, LLC | $52.6M | 394,957 | 0.70% | 4q | +23.2%+$9.9M |
| MPM BIOIMPACT LLC | $44.8M | 336,347 | 2.73% | 3q | +213.6%+$30.5M |
| Kite Lake Capital Management (UK) LLP | $44.0M | 300,600 | 15.18% | 2q | +200.6%+$29.4M |
| Affinity Asset Advisors, LLC | $44.0M | 330,000 | 1.99% | 6q | -18.5%-$10.0M |
| MILLENNIUM MANAGEMENT LLC | $41.0M | 233,740 | 0.01% | 11q | -61.4%-$65.3M |
| Melqart Asset Management (UK) Ltd | $40.9M | 307,250 | 3.90% | new | NEW |
| FRANKLIN RESOURCES INC | $39.9M | 299,754 | 0.01% | 11q | -21.7%-$11.1M |
| STEMPOINT CAPITAL LP | $37.8M | 283,657 | 6.51% | 5q | -54.8%-$45.8M |
| Nantahala Capital Management, LLC | $35.6M | 267,518 | 0.59% | 11q | +94.9%+$17.4M |
| PRINCIPAL FINANCIAL GROUP INC | $34.3M | 257,678 | 0.02% | 3q | -17.5%-$7.3M |
| TORONTO DOMINION BANK | $32.3M | 88,331 | 0.04% | new | NEW |
| READYSTATE ASSET MANAGEMENT LP | $32.2M | 241,530 | 1.10% | 3q | +19.6%+$5.3M |
| Woodline Partners LP | $30.2M | 226,966 | 0.09% | 9q | HELD |
| SILVERARC CAPITAL MANAGEMENT, LLC | $29.3M | 169,593 | 3.04% | 4q | -43.9%-$22.9M |
| Patient Square Capital LP | $27.5M | 206,500 | 4.26% | 4q | +70.3%+$11.4M |
| Western Standard LLC | $26.7M | 200,000 | 9.03% | new | NEW |
| JENNISON ASSOCIATES LLC | $26.2M | 196,524 | 0.02% | 3q | -6.7%-$1.9M |
| FMR LLC | $25.5M | 191,689 | 0.00% | 4q | -85.1%-$145.9M |
| DG Capital Management, LLC | $25.2M | 122,267 | 5.30% | new | NEW |
| FINDELL CAPITAL MANAGEMENT LLC | $24.7M | 185,000 | 3.47% | 4q | +76.2%+$10.7M |
| JANE STREET GROUP, LLC | $24.6M | 60,195 | 0.00% | 4q | -36.1%-$13.9M |
| Focus Partners Wealth | $21.6M | 161,874 | 0.02% | new | NEW |
| Creek Drive Management Group LLC | $21.0M | 157,500 | 10.19% | 3q | +1.6%+$333.1K |
| AMERIPRISE FINANCIAL INC | $19.7M | 129,816 | 0.00% | 4q | -21.8%-$5.5M |
| NAN FUNG TRINITY (HK) LTD | $18.9M | 142,083 | 1.87% | 4q | +10.2%+$1.8M |
| APEIRON CAPITAL Ltd | $17.4M | 130,600 | 11.18% | new | NEW |
| D. E. Shaw & Co., Inc. | $17.4M | 90,357 | 0.01% | 4q | +78.7%+$7.7M |
| Ally Bridge Group (NY) LLC | $16.7M | options only | 14.73% | 3q | OPTIONS |
| WELLINGTON MANAGEMENT GROUP LLP | $16.4M | 123,289 | 0.00% | new | NEW |
| FARALLON CAPITAL MANAGEMENT, L.L.C. | $16.3M | 122,000 | 0.08% | 4q | +6000.0%+$16.0M |
| HighVista Strategies LLC | $15.1M | 113,031 | 3.43% | 10q | HELD |
| Seven Fleet Capital Management LP | $14.8M | 111,334 | 2.45% | 3q | +158.6%+$9.1M |
| K2 PRINCIPAL FUND, L.P. | $14.6M | 24,403 | 1.07% | 3q | -54.6%-$17.5M |
| Prosight Management, LP | $14.3M | 107,394 | 2.47% | 3q | +2.3%+$319.0K |
| TimesSquare Capital Management, LLC | $13.5M | 101,092 | 0.20% | 4q | -7.4%-$1.1M |
| WELLS FARGO & COMPANY/MN | $13.1M | 98,077 | 0.00% | 4q | +1593.3%+$12.3M |
| ACT CAPITAL MANAGEMENT, LLC | $12.9M | 97,000 | 8.44% | 3q | +36.8%+$3.5M |
| Quinn Opportunity Partners LLC | $12.8M | 66,045 | 0.59% | 2q | +312.8%+$9.7M |
| SEI INVESTMENTS CO | $12.3M | 92,176 | 0.01% | 4q | -2.2%-$272.4K |
| SEVEN GRAND MANAGERS, LLC | $12.0M | 90,000 | 0.48% | 2q | +80.0%+$5.3M |
| Point72 Asset Management, L.P. | $11.4M | 5,028 | 0.01% | 11q | -99.2%-$1.4B |
| ODDO BHF ASSET MANAGEMENT SAS | $10.9M | 81,496 | 0.50% | 3q | HELD |
| Qube Research & Technologies Ltd | $10.8M | 81,216 | 0.01% | new | NEW |
| Erste Asset Management GmbH | $10.6M | 110,000 | 0.08% | 4q | +120.0%+$5.8M |
| LPL Financial LLC | $10.5M | 78,999 | 0.00% | 4q | +4.8%+$484.1K |
| ANDERA PARTNERS | $10.4M | 78,125 | 5.04% | 3q | HELD |
| FEDERATED HERMES, INC. | $10.4M | 77,900 | 0.01% | 4q | -28.0%-$4.0M |
| Optiver Holding B.V. | $10.2M | 76,368 | 0.00% | 4q | +1582.9%+$9.6M |
| PERCEPTIVE ADVISORS LLC | $9.9M | 74,000 | 0.15% | 4q | -77.5%-$34.0M |
| Apis Capital Advisors, LLC | $9.9M | 74,000 | 0.96% | 4q | -42.5%-$7.3M |
| Velan Capital Investment Management LP | $8.7M | 65,630 | 5.33% | 4q | -14.8%-$1.5M |
| SummitTX Capital, L.P. | $8.7M | 65,216 | 0.22% | new | NEW |
| Alberta Investment Management Corp | $8.7M | 65,000 | 0.05% | 2q | +44.4%+$2.7M |
| ENVESTNET ASSET MANAGEMENT INC | $8.4M | 63,354 | 0.00% | 4q | +7.0%+$552.4K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | Chen Yu INDIVIDUALwith 4 co-filers | 7.0% |
| 2026-08-13 | 13G/A | Invus Public Equities, L.P.with 7 co-filers | 6.0% |
| 2026-07-06 | 13D/A | Sofinnova Crossover I SLPwith 6 co-filers | 4.3% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 300 | $8.8B | 54,505,118 | 97 | 92 | 92 | 19.5% |
| Q1 2026 | 245 | $5.8B | 49,482,742 | 48 | 108 | 72 | 6.3% |
| Q4 2025 | 237 | $8.0B | 55,287,989 | 100 | 72 | 48 | 7.1% |
| Q3 2025 | 158 | $4.4B | 51,510,145 | 124 | 17 | 17 | 0.2% |
| Q2 2025 | 43 | $234.6M | 30,664,346 | 6 | 15 | 11 | 0.0% |
| Q1 2025 | 45 | $198.5M | 31,758,886 | 7 | 18 | 10 | 0.0% |
| Q4 2024 | 47 | $218.6M | 29,861,029 | 10 | 14 | 9 | 0.0% |
| Q3 2024 | 39 | $312.8M | 27,383,784 | 4 | 17 | 12 | 0.0% |
| Q2 2024 | 37 | $384.7M | 29,084,444 | 4 | 12 | 13 | 0.0% |
| Q1 2024 | 35 | $351.1M | 24,558,838 | 12 | 9 | 7 | 0.0% |
| Q4 2023 | 29 | $243.2M | 22,703,742 | 29 | 0 | 0 | 0.0% |