$ABVX

$88.90 +$2.40 (2.77%) Live

$ABVX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 78.5M shares outstanding

Who owns ABVX?

By type of holder

Institutions 68.6% Everyone else 31.4%

No insider has reported a holding in the last two years, so insiders are counted in "Everyone else".

Concentration Top 10 holders own 39.4%

TCG Crossover Management, LLC 7.7% · UBS Group AG 2.4%

Institutional ownership

68.6%

+4.9 pts vs last qtr

Institutional holders

301

+48 vs last qtr

Net shares bought

+3.9M

by institutions in Q2 2026

New / sold out

92 / 44

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Jupiter Topco LLC NEW +1.9M
Helikon Investments Ltd +1.8M

Biggest sellers in Q2 2026

UBS Group AG −2.7M
FMR LLC −1.1M

Who is planning to sell?

Notices of proposed sale, last 12 months

$134M

1 notice from 1 person

Shares covered

1.0M

1.27% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Sofinnova Crossover I SLP Affiliate $134M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Abivax SA.

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years38% Under 1 year62%

Quarterly turnover

31.3%

of institutional shares changed hands

Top 10 managers, median time held

1.8 years

Super Investors

Investment managers reporting ABVX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
TC TCG Crossover Management, LLC	6.0M	7.65%	−473.3K (−7.3%)	2023	19.2%
Shares held by quarter Peak holding7.1M (Q3'25) Change over 8 quarters−48.8K Share of the company7.650% TCG Crossover Management, LLC's full portfolio →
UG UBS Group AG	1.8M	2.35%	−2.7M (−59.4%)	2024	0.0%
Shares held by quarter Peak holding4.5M (Q1'26) Change over 8 quarters+1.8M Share of the company2.350% UBS Group AG's full portfolio →

TCG Crossover Management, LLC

6.0M

% of company

7.65%

Change vs last qtr

−473.3K (−7.3%)

Held since

2023

UBS Group AG

1.8M

% of company

2.35%

Change vs last qtr

−2.7M (−59.4%)

Held since

2024

28 more super investors behind a free account

See every manager holding Abivax SA, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ABVX on Form N-PORT; together they hold 8.1% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
AF Alger Focus Equity Fund Alger Institutional Funds	$75.9M	607.6K	0.77%	1.07%	July 31, 2026
IB iShares Biotechnology ETF iShares Trust	$61.1M	458.8K	0.58%	0.67%	June 30, 2026

Alger Focus Equity Fund

Alger Institutional Funds

Position value

$75.9M

% of company

0.77%

% of the fund

1.07%

As of

July 31, 2026

iShares Biotechnology ETF

iShares Trust

Position value

$61.1M

% of company

0.58%

% of the fund

0.67%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Abivax SA and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
AP Antoine Papiernik 5%+ holder 13D · 4.3%	3.5M	4.50%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company4.500% Disclosed stake13D · 4.3% View the 13D/G filing →
SP Sofinnova Partners SAS 5%+ holder 13D · 4.3%	3.5M	4.50%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company4.500% Disclosed stake13D · 4.3% View the 13D/G filing →

Antoine Papiernik

5%+ holder13D · 4.3%

3.5M

% of company

4.50%

Change vs last qtr

—

Held since

—

Sofinnova Partners SAS

5%+ holder13D · 4.3%

3.5M

% of company

4.50%

Change vs last qtr

—

Held since

—

1 more holders behind a free account

See every insider and 5%+ holder of Abivax SA.

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