Abivax S.A. (ABVX) — Institutional Holders, Q2 2026

303 institutional investment managers reported a ABVX position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $7.2B. 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.

← ABVX stock profile

ABVX 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.

New positions

Added to

Trimmed

100

Sold out

Biggest buyers

Helikon Investments LtdAdded · +1,773,807 sh+$236.4M
RA CAPITAL MANAGEMENT, L.P.New · +1,132,557 sh+$150.9M
CITADEL ADVISORSAdded · +894,014 sh+$119.1M
Vestal Point CapitalAdded · +849,443 sh+$113.2M
SUSQUEHANNA INTERNATIONAL GROUP, LLPAdded · +672,614 sh+$89.6M

Biggest sellers

UBS Group AGTrimmed · -2,702,488 sh-$360.1M
FMRTrimmed · -1,094,684 sh-$145.9M
BAKER BROS. ADVISORSSold out · -875,796 sh-$116.7M
LORD, ABBETTTrimmed · -845,420 sh-$112.7M
Paradigm Biocapital AdvisorsSold out · -772,473 sh-$102.9M

ABVX 13F holders ranked 1–100 of 303

Institutional investors reporting a position in Abivax S.A. on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	TCG Crossover Management#1 · 6,007,834 sh	6,007,834	$800.6M	19.24%	-7.3%
2	Helikon Investments Ltd#2 · 2,787,131 sh	2,787,131	$371.4M	11.10%	+175.0%
3	Darwin Global Management, Ltd.#3 · 3,621,583 sh	3,621,583	$348.2M	9.26%	+4.4%
4	Vestal Point Capital#4 · 2,349,443 sh	2,349,443	$313.1M	7.32%	+56.6%
5	Jupiter Topco#5 · 1,913,933 sh	1,913,933	$255.1M	0.10%	—
6	UBS Group AG#6 · 1,844,918 sh	1,844,918	$245.9M	0.03%	-59.4%
7	ADAR1 Capital Management#7 · 1,804,703 sh	1,804,703	$240.5M	11.01%	+29.5%
8	Caligan Partners#8 · 1,557,924 sh	1,557,924	$207.6M	9.77%	+6.6%
9	CITADEL ADVISORS#9 · 1,438,352 sh	1,438,352	$191.7M	0.02%	+164.2%
10	MORGAN STANLEY#10 · 1,432,185 sh	1,432,185	$190.9M	0.01%	-16.0%
11	WESTFIELD CAPITAL MANAGEMENT#11 · 1,309,825 sh	1,309,825	$174.5M	0.57%	-1.0%
12	RA CAPITAL MANAGEMENT, L.P.#12 · 1,132,557 sh	1,132,557	$150.9M	1.31%	New
13	NORGES BANK#13 · 1,100,000 sh	1,100,000	$146.6M	0.01%	—
14	SUSQUEHANNA INTERNATIONAL GROUP, LLP#14 · 1,053,896 sh	1,053,896	$140.4M	0.01%	+176.4%
15	Logos Global Management#15 · 1,024,000 sh	1,024,000	$136.5M	5.87%	+51.7%
16	Octagon Capital Advisors#16 · 993,000 sh	993,000	$132.3M	11.89%	+46.7%
17	BANK OF AMERICA#17 · 971,439 sh	971,439	$129.5M	<0.01%	+32.0%
18	Eversept Partners#18 · 913,880 sh	913,880	$121.8M	6.32%	-2.2%
19	GOLDMAN SACHS GROUP#19 · 792,712 sh	792,712	$105.6M	<0.01%	+127.3%
20	Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A.#20 · 765,332 sh	765,332	$102.0M	5.59%	-0.1%
21	Cormorant Asset Management#21 · 675,000 sh	675,000	$90.0M	4.61%	-11.2%
22	Boxer Capital Management#22 · 605,000 sh	605,000	$80.6M	6.07%	+202.5%
23	BALYASNY ASSET MANAGEMENT L.P.#23 · 603,840 sh	603,840	$80.5M	0.10%	+182.6%
24	Siren, L.L.C.#24 · 576,000 sh	576,000	$76.8M	1.55%	New
25	BlackRock#25 · 574,061 sh	574,061	$76.5M	<0.01%	+34.3%
26	BOOTHBAY FUND MANAGEMENT#26 · 563,367 sh	563,367	$75.1M	0.99%	+19.1%
27	ORBIMED ADVISORS#27 · 546,522 sh	546,522	$72.8M	1.35%	+17.4%
28	abrdn plc#28 · 522,025 sh	522,025	$69.6M	0.10%	+21.1%
29	Saturn V Capital Management#29 · 518,865 sh	518,865	$69.1M	9.91%	-4.4%
30	Artia Global Partners#30 · 516,447 sh	516,447	$68.8M	12.70%	-14.0%
31	Ensign Peak Advisors#31 · 504,471 sh	504,471	$67.2M	0.11%	-20.2%
32	Pictet Asset Management Holding SA#32 · 492,068 sh	492,068	$65.6M	0.06%	+375.2%
33	First Turn Management#33 · 489,889 sh	489,889	$65.3M	6.98%	+5.2%
34	Holocene Advisors#34 · 418,657 sh	418,657	$55.8M	0.13%	+61.9%
35	Vivo Capital#35 · 414,899 sh	414,899	$55.3M	5.05%	+73.2%
36	SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT#36 · 410,000 sh	410,000	$54.6M	0.96%	New
37	EVENTIDE ASSET MANAGEMENT#37 · 394,957 sh	394,957	$52.6M	0.70%	+23.2%
38	MPM BioImpact#38 · 336,347 sh	336,347	$44.8M	2.73%	+213.6%
39	Affinity Asset Advisors#39 · 330,000 sh	330,000	$44.0M	1.99%	-18.5%
40	Ikarian Capital#40 · 328,635 sh	328,635	$43.4M	4.67%	+470.2%
41	Melqart Asset Management (UK) Ltd#41 · 307,250 sh	307,250	$40.9M	3.90%	New
42	Kite Lake Capital Management (UK) LLP#42 · 300,600 sh	300,600	$40.1M	13.82%	+200.6%
43	PRICE T ROWE ASSOCIATES#43 · 300,365 sh	300,365	$40.0M	<0.01%	-56.6%
44	FRANKLIN RESOURCES#44 · 299,754 sh	299,754	$39.9M	<0.01%	-21.7%
45	StemPoint Capital#45 · 283,657 sh	283,657	$37.8M	6.51%	-9.6%
46	HRT FINANCIAL#46 · 312,812 sh	312,812	$36.1M	0.09%	+232.5%
47	PRINCIPAL FINANCIAL GROUP#47 · 257,678 sh	257,678	$34.3M	0.02%	-17.5%
48	Two Seas Capital#48 · 244,590 sh	244,590	$32.6M	—	New
49	READYSTATE ASSET MANAGEMENT#49 · 241,530 sh	241,530	$32.2M	0.02%	+19.6%
50	MILLENNIUM MANAGEMENT#50 · 233,740 sh	233,740	$31.1M	0.01%	-61.4%
51	Woodline Partners#51 · 226,966 sh	226,966	$30.2M	0.09%	+0.5%
52	Patient Square Capital#52 · 206,500 sh	206,500	$27.5M	4.26%	+70.3%
53	GREAT POINT PARTNERS#53 · 204,314 sh	204,314	$27.2M	5.15%	New
54	Western Standard#54 · 200,000 sh	200,000	$26.7M	9.03%	New
55	JENNISON ASSOCIATES#55 · 196,524 sh	196,524	$26.2M	0.02%	-6.7%
56	FMR#56 · 191,689 sh	191,689	$25.5M	<0.01%	-85.1%
57	TUDOR INVESTMENT ET AL#57 · 187,335 sh	187,335	$25.0M	0.03%	+84.4%
58	FINDELL CAPITAL MANAGEMENT#58 · 185,000 sh	185,000	$24.7M	3.47%	+76.2%
59	SILVERARC CAPITAL MANAGEMENT#59 · 169,593 sh	169,593	$22.6M	2.35%	-43.9%
60	DIADEMA PARTNERS#60 · 163,644 sh	163,644	$21.6M	2.73%	+115.5%
61	Focus Partners Wealth#61 · 161,874 sh	161,874	$21.6M	0.02%	New
62	Creek Drive Management Group#62 · 157,500 sh	157,500	$21.0M	10.19%	+1.6%
63	NAN FUNG TRINITY (HK) Ltd#63 · 142,083 sh	142,083	$18.9M	1.87%	+10.2%
64	Nantahala Capital Management#64 · 133,759 sh	133,759	$17.8M	0.59%	-2.5%
65	APEIRON CAPITAL Ltd#65 · 130,600 sh	130,600	$17.4M	11.18%	New
66	AMERIPRISE FINANCIAL#66 · 129,816 sh	129,816	$17.3M	<0.01%	+56.3%
67	WELLINGTON MANAGEMENT GROUP LLP#67 · 123,289 sh	123,289	$16.4M	<0.01%	New
68	DG Capital Management#68 · 122,267 sh	122,267	$16.3M	3.43%	New
69	FARALLON CAPITAL MANAGEMENT#69 · 122,000 sh	122,000	$16.3M	0.07%	+6000.0%
70	HighVista Strategies#70 · 113,031 sh	113,031	$15.1M	3.43%	-0.2%
71	Seven Fleet Capital Management#71 · 111,334 sh	111,334	$14.8M	2.45%	+158.6%
72	Prosight Management#72 · 107,394 sh	107,394	$14.3M	2.47%	+2.3%
73	Verition Fund Management#73 · 105,791 sh	105,791	$14.1M	0.02%	+307.7%
74	TimesSquare Capital Management#74 · 101,092 sh	101,092	$13.5M	0.20%	-7.4%
75	WELLS FARGO & COMPANY#75 · 98,077 sh	98,077	$13.1M	<0.01%	+3286.6%
76	ACT CAPITAL MANAGEMENT#76 · 97,000 sh	97,000	$12.9M	8.45%	+36.8%
77	SEI INVESTMENTS#77 · 92,176 sh	92,176	$12.3M	0.01%	-2.2%
78	D. E. Shaw#78 · 90,357 sh	90,357	$12.0M	<0.01%	+78.7%
79	SEVEN GRAND MANAGERS#79 · 90,000 sh	90,000	$12.0M	0.48%	+80.0%
80	TORONTO DOMINION BANK#80 · 88,331 sh	88,331	$11.8M	0.01%	New
81	IMC-Chicago#81 · 87,392 sh	87,392	$11.6M	<0.01%	-17.7%
82	ODDO BHF ASSET MANAGEMENT SAS#82 · 81,496 sh	81,496	$10.9M	0.50%	0.0%
83	Qube Research & Technologies Ltd#83 · 81,216 sh	81,216	$10.8M	0.01%	New
84	Erste Asset Management GmbH#84 · 110,000 sh	110,000	$10.6M	0.08%	+120.0%
85	LPL Financial#85 · 78,999 sh	78,999	$10.5M	<0.01%	+4.8%
86	Andera Partners#86 · 78,125 sh	78,125	$10.4M	—	0.0%
87	FEDERATED HERMES#87 · 77,900 sh	77,900	$10.4M	0.01%	-28.0%
88	Optiver Holding B.V.#88 · 76,368 sh	76,368	$10.2M	<0.01%	+1582.9%
89	PERCEPTIVE ADVISORS#89 · 74,000 sh	74,000	$9.9M	0.15%	-77.5%
90	APIS CAPITAL ADVISORS#90 · 74,000 sh	74,000	$9.9M	0.96%	-42.5%
91	NWI MANAGEMENT#91 · 72,000 sh	72,000	$9.6M	0.44%	New
92	Quinn Opportunity Partners#92 · 66,045 sh	66,045	$8.8M	0.41%	+312.8%
93	Velan Capital Investment Management#93 · 65,630 sh	65,630	$8.7M	5.33%	-14.8%
94	SummitTX Capital, L.P.#94 · 65,216 sh	65,216	$8.7M	0.22%	New
95	Alberta Investment Management#95 · 65,000 sh	65,000	$8.7M	0.05%	+44.4%
96	ENVESTNET ASSET MANAGEMENT#96 · 63,354 sh	63,354	$8.4M	<0.01%	+7.0%
97	JANE STREET GROUP#97 · 60,195 sh	60,195	$8.0M	<0.01%	-36.1%
98	HealthInvest Partners AB#98 · 58,170 sh	58,170	$7.8M	2.09%	+84.1%
99	Samsara BioCapital#99 · 55,095 sh	55,095	$7.3M	0.60%	-2.6%
100	Senator Investment Group#100 · 55,000 sh	55,000	$7.3M	0.27%	New

Funds that sold out of ABVX in Q2 2026 (38)

Held ABVX 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.

Institutions that held ABVX in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
BAKER BROS. ADVISORS875,796 sh	875,796	$97.5M
Paradigm Biocapital Advisors772,473 sh	772,473	$86.0M
Evergreen Quality Fund GP, Ltd.144,300 sh	144,300	$16.1M
Hudson Bay Capital Management139,379 sh	139,379	$15.5M
Sio Capital Management135,800 sh	135,800	$15.1M
Squadron Capital Management130,000 sh	130,000	$14.5M
Nicholas Investment Partners90,206 sh	90,206	$10.0M
Davern Capital Partners78,125 sh	78,125	$8.7M
Trexquant Investment48,749 sh	48,749	$5.4M
Catalio Capital Management47,193 sh	47,193	$5.3M
Candriam S.C.A.36,061 sh	36,061	$4.0M
Ally Bridge Group (NY)33,712 sh	33,712	$3.8M
CAXTON ASSOCIATES LLP24,750 sh	24,750	$2.8M
Brummer Multi-Strategy AB22,428 sh	22,428	$2.5M
Cinctive Capital Management20,055 sh	20,055	$2.2M
Militia Capital Management17,000 sh	17,000	$1.9M
SCHRODER INVESTMENT MANAGEMENT GROUP17,928 sh	17,928	$1.8M
FIFTH LANE CAPITAL15,858 sh	15,858	$1.8M
BANQUE PICTET & CIE SA15,040 sh	15,040	$1.7M
E Fund Management , Ltd.13,732 sh	13,732	$1.5M
Progeny 312,240 sh	12,240	$1.4M
Brevan Howard Capital Management9,500 sh	9,500	$1.1M
NEW YORK STATE COMMON RETIREMENT FUND8,672 sh	8,672	$965.6K
WESBANCO BANK5,000 sh	5,000	$556.8K
HARVEY CAPITAL MANAGEMENT4,300 sh	4,300	$478.8K
Connective Portfolio Management2,700 sh	2,700	$300.6K
GTS SECURITIES2,652 sh	2,652	$295.3K
ASHTON THOMAS SECURITIES2,500 sh	2,500	$278.4K
WILEY BROS.-AINTREE CAPITAL1,854 sh	1,854	$206.4K
Gordian Capital Singapore Pte Ltd1,000 sh	1,000	$111.3K
Advisory Services Network442 sh	442	$49.2K
HighMark Wealth Management150 sh	150	$16.7K
MAI Capital Management25 sh	25	$2.8K
Pinnacle Wealth Planning Services15 sh	15	$1.7K
TOTH FINANCIAL ADVISORY11 sh	11	$1.2K
Union Bankshares10 sh	10	$1.1K
FIFTH THIRD BANCORP7 sh	7	$779.00
Sunrise Financial Services4 sh	4	$445.00

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.