Security key
00370M103
Abivax S.A. - Ordinary Shares, par value EUR0.01 per share (ABVX)
CUSIP: 00370M103
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Ordinary Shares, par value EUR0.01 per share
- Total 13F shares
- 56,312,422
- Total 13F value
- $7,607,004,075
- Share change
- +3,845,855
- Put/Call ratio
- 65%
- SEC-reported price per share
- $134.86
- Number of holders
- 247
- Value change
- +$630,821,272
- Number of buys
- 172
- Number of sells
- 74
- Shares outstanding
- 82,228,907
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
247
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 EUR0.01 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
15/15
Latest evidence
31 Dec 2025
13D/G
13F
Lead comparable stake: 9.1%
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 9.1%.
15 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
9.1%
Invus Global Management, LLC
5%
Deep Track Capital, LP
4.8%
Venrock Healthcare Capital Partne...
0.8%
TCG Crossover Management, LLC
8.6%
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
|
9.1%
|
$603,774,500
7,111,596 shares
|
$0 | 30 Sep 2025 |
| Invus Global Management, LLC |
13D/G
Invus Public Equities, L.P.
|
5%
|
$469,347,122
3,922,995 shares
|
-$177,185,644 | 31 Dec 2025 |
| Deep Track Capital, LP |
13D/G
|
4.8%
|
$28,885,195
3,480,144 shares
|
$0 | 30 Jun 2025 |
| Venrock Healthcare Capital Partners III, L.P. |
13D/G
|
0.8%
|
$48,964,292
576,729 shares
|
$0 | 30 Sep 2025 |
| TCG Crossover Management, LLC |
13F
Company
|
8.6%
|
$603,774,500
7,111,596 shares
|
— | 30 Sep 2025 |
| UBS Group AG |
13F
Company
|
5.4%
|
$378,761,144
4,461,262 shares
|
— | 30 Sep 2025 |
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 Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
247
Shares
56,312,422
Rows available
247
| 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 Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
165
Q4 2025 holders
247
Holder diff
82
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|