Abivax ABVX Institutional Ownership

NASDAQ ABVX

$96.85 +5.79 (+6.36%)

At close: Sep 28, 2026 · 4:00 PM EDT

Institutions by Trading Activity

303 Institutions

Increased 191 63.0%

Unchanged 13 4.3%

Reduced 99 32.7%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

79.03%

▲+7.25 pp QoQ

Shares Held by Institutions

54.95Mn

of 69.53Mn outstanding

▲+18.70% QoQ

Shares Outstanding

69.53Mn

14.58Mn held outside 13F filers

Institutional Investors

303

filed 13F for Jun 2026

▲+53 vs prior quarter

Net Shares Added (QoQ)

+8.66Mn

accumulated since last quarter

Value of Holdings

$5.00Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Abivax S.A. (NASDAQ:ABVX) showed up in the 13F filings of 303 institutional investors as of June 2026.

These investors collectively held 79.0% of Abivax's outstanding shares in June 2026, up from 71.8% in March 2026.
They increased total shares held in Abivax by 18.7% from last quarter, and the number of investors in ABVX increased 621.43% annually.
Activity in ABVX broke down as 191 buyers, 99 sellers, and 13 unchanged among 303 total holders.
In total, institutional investors held 54.95Mn shares in Abivax as of June 2026, up by 8.66Mn shares quarter on quarter, and up 26.01Mn shares year over year.
TCG Crossover Management, LLC holds the largest position in ABVX at 6.01Mn shares as of June 30, 2026, or 8.64% of shares outstanding.
Leading buyers of Abivax shares for the quarter ending June 2026 were Jupiter Topco LLC (1.91Mn), Helikon Investments Ltd (1.77Mn), RA CAPITAL MANAGEMENT, L.P. (1.13Mn), NORGES BANK (1.1Mn), CITADEL ADVISORS LLC (894.01K).
The largest sellers of Abivax for the quarter ending June 2026 were UBS Group AG (2.7Mn), FMR LLC (1.09Mn), LORD, ABBETT & CO. LLC (845.42K), Point72 Asset Management, L.P. (632.71K), Jpmorgan Chase & Co (629.35K).
Per Business Quant data, the top 10 holders of Abivax for the quarter ending June 2026 are TCG Crossover Management, LLC (6.01Mn), Darwin Global Management, Ltd. (3.62Mn), Helikon Investments Ltd (2.79Mn), Vestal Point Capital, LP (2.35Mn), Jupiter Topco LLC (1.91Mn), UBS Group AG (1.84Mn), ADAR1 Capital Management, LLC (1.8Mn), Caligan Partners LP (1.56Mn), CITADEL ADVISORS LLC (1.44Mn), Morgan Stanley (1.43Mn).

Form 13F Holdings

302 Institutional Holders

Report period 30 Jun, 2026

Total shares held 54.95Mn

Of outstanding 79.03%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	TCG Crossover Management, LLC	0001839948	6,007,834	8.64%	▼473,251	-7.30%	$800.60Mn
2	Darwin Global Management, Ltd.	0001839209	3,621,583	5.21%	▲152,926	+4.41%	$348.22Mn
3	Helikon Investments Ltd	0001839497	2,787,131	4.01%	▲1,773,807	+175.05%	$371.41Mn
4	Vestal Point Capital, LP	0001974915	2,349,443	3.38%	▲849,443	+56.63%	$313.09Mn
5	Jupiter Topco LLC	0002146052	1,913,933	2.75%	▲1,913,933	0.00%	$255.13Mn
6	UBS Group AG	0001610520	1,844,918	2.65%	▼2,702,488	-59.43%	$245.85Mn
7	ADAR1 Capital Management, LLC	0001940272	1,804,703	2.60%	▲410,684	+29.46%	$240.49Mn
8	Caligan Partners LP	0001727492	1,557,924	2.24%	▲96,000	+6.57%	$207.61Mn
9	CITADEL ADVISORS LLC	0001423053	1,438,352	2.07%	▲894,014	+164.24%	$191.67Mn
10	Morgan Stanley	0000895421	1,432,185	2.06%	▼272,773	-16.00%	$190.85Mn
11	WESTFIELD CAPITAL MANAGEMENT CO LP	0001177719	1,309,825	1.88%	▼13,113	-0.99%	$174.55Mn
12	RA CAPITAL MANAGEMENT, L.P.	0001346824	1,132,557	1.63%	▲1,132,557	0.00%	$150.92Mn
13	NORGES BANK	0001374170	1,100,000	1.58%	▲1,100,000	0.00%	$146.59Mn
14	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0001446194	1,053,896	1.52%	▲672,614	+176.41%	$140.44Mn
15	Logos Global Management LP	0001792126	1,024,000	1.47%	▲349,000	+51.70%	$136.46Mn
16	Octagon Capital Advisors LP	0001839435	993,000	1.43%	▲316,000	+46.68%	$132.33Mn
17	Bank Of America Corp /De/	0000070858	971,439	1.40%	▲235,710	+32.04%	$129.45Mn
18	Eversept Partners, LP	0001697013	913,880	1.31%	▼20,543	-2.20%	$121.78Mn
19	Goldman Sachs Group Inc	0000886982	792,712	1.14%	▲443,915	+127.27%	$105.64Mn
20	Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A.	0002011081	765,332	1.10%	▼583	-0.08%	$101.99Mn

Showing 1 to 20 of 302 holders