Caligan Partners LP: ABIVAX SA (ABVX): Quarterly 13F Position History
As of Q1 2026, Caligan Partners LP reported 1,461,924 shares of ABIVAX SA (ABVX), worth $162.8M and representing 11.5% of its 13F equity book. Quarter-over-quarter share count change: + 10,000 (+0.7%) . The position first appeared in Q4 2024 and has been disclosed across 6 13F-HR filings in Pactolio's tracked window.
- 1,461,924Shares Held (Latest Filing)
- $162.8MReported Market Value (Latest Filing)
- 11.5%Portfolio Weight (% of 13F Equity Book)
- +10,000Quarter-over-Quarter Share Change
- -$33.0MQuarter-over-Quarter Value Change
- 1,674,400Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 6 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,461,924 | +10,000 | +0.7% | $162.8M | 11.5% | $111.3 |
| Q4 2025 | 1,451,924 | 0 | — | $195.8M | 17.9% | $134.9 |
| Q3 2025 | 1,451,924 | 222,476 | -13.3% | $123.3M | 17.1% | $84.9 |
| Q2 2025 | 1,674,400 | +405,281 | +31.9% | $12.8M | 2.5% | $7.7 |
| Q1 2025 | 1,269,119 | +516,952 | +68.7% | $7.9M | 1.7% | $6.3 |
| Q4 2024 | 752,167 | — | — | $5.5M | 1.4% | $7.3 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did Caligan Partners LP first disclose a ABVX position in 13F-HR filings?
Caligan Partners LP first reported ABIVAX SA (ABVX) on its 13F-HR filing for the period ending 2024-12-31 (Q4 2024). The position has appeared on 6 reported quarters within Pactolio's tracked window.
What was Caligan Partners LP's most recent quarter-over-quarter share-count change in ABVX?
Between Q4 2025 and Q1 2026, Caligan Partners LP added 10,000 shares of ABVX (+0.7%), bringing the total reported position to 1,461,924 shares at a market value of $162.8M.
Does the implied price-per-share represent Caligan Partners LP's cost basis in ABVX?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.