Security key
00370M103
Abivax S.A. - Ordinary Shares, par value Euro 0.01 per share (ABVX)
CUSIP: 00370M103
Q3 2026 13F Holders as of 30 Sep 2026
- Security type / class
- Equity / Ordinary Shares, par value Euro 0.01 per share
- Total 13F shares
- 919,594
- Total 13F value
- $89,929,809
- Share change
- +442,130
- SEC-reported price per share
- $99.02
- Number of holders
- 41
- Value change
- +$39,976,140
- Number of buys
- 30
- Number of sells
- 13
- Shares outstanding
- 85,826,200
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2026
Institutions
41
Top holders
10
ABVX full security history
Ownership snapshot
Full 13F holder table
Abivax S.A. SEC filings
Abivax S.A. company facts
Broader feeds
Ownership snapshot
Top reported holders of ABVX - Abivax S.A. - Ordinary Shares, par value Euro 0.01 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
TCG Crossover GP I, LLC
Disclosed value leader
TCG Crossover GP I, LLC
Comparable rows
5/15
Latest evidence
02 Jul 2026
13D/G
13F
Lead comparable stake: 7%
10 rows are not safely comparable across share classes.
13D/G row: TCG Crossover GP I, LLC
Showing 1-6 of 15 holder rows.
Quick read
TCG Crossover GP I, LLC leads the comparable SEC ownership view at 7%.
5 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens TCG Crossover GP I, LLC's linked filing trail.
Comparable ownership
Top 5
TCG Crossover GP I, LLC
7%
Invus Global Management, LLC
6%
Deep Track Capital, LP
4.8%
Sofinnova Crossover I
4.3%
Venrock Healthcare Capital Partne...
0.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| TCG Crossover GP I, LLC |
13D/G
Chen Yu
|
7%
Reported 13D/G
· 30 Jun 2026
|
$816,945,267
6,007,834 shares
|
-$150,089,557 | 30 Jun 2026 |
| Invus Global Management, LLC |
13D/G
Raymond Debbane
|
6%
Reported 13D/G
· 30 Jun 2026
|
$656,206,709
4,825,759 shares
|
+$122,757,849 | 30 Jun 2026 |
| Deep Track Capital, LP |
13D/G
|
4.8%
Reported 13D/G
· 30 Jun 2025
|
$28,885,195
3,480,144 shares
|
$0 | 30 Jun 2025 |
| Sofinnova Crossover I |
13D/G
Sofinnova Crossover I SLP
|
4.3%
Reported 13D/G
· 02 Jul 2026
|
$471,190,328
3,535,843 shares
|
-$261,676,160 | 02 Jul 2026 |
| Venrock Healthcare Capital Partners III, L.P. |
13D/G
|
0.8%
Reported 13D/G
· 30 Sep 2025
|
$48,964,292
576,729 shares
|
$0 | 30 Sep 2025 |
| TCG Crossover Management, LLC |
13F
Company
|
—
denominator unverified
|
$800,603,959
6,007,834 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
41
Shares
919,594
Rows available
41
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2026 vs Q2 2026 Across Filers
Q2 2026 holders
303
Q3 2026 holders
41
Holder diff
-262
| Investor | Q2 2026 Shares | Q3 2026 Shares | Share Diff | Share Chg % | Q2 2026 value | Q3 2026 value | Value change | Value Chg % |
|---|