DEERFIELD MANAGEMENT COMPANY, L.P.: PRAXIS PRECISION MEDICINES I (PRAX): Quarterly 13F Position History
As of Q1 2026, DEERFIELD MANAGEMENT COMPANY, L.P. reported 963,351 shares of PRAXIS PRECISION MEDICINES I (PRAX), worth $310.4M and representing 3.7% of its 13F equity book. Quarter-over-quarter share count change: + 60,000 (+6.6%) . The position first appeared in Q1 2025 and has been disclosed across 5 13F-HR filings in Pactolio's tracked window.
- 963,351Shares Held (Latest Filing)
- $310.4MReported Market Value (Latest Filing)
- 3.7%Portfolio Weight (% of 13F Equity Book)
- +60,000Quarter-over-Quarter Share Change
- +$44.1MQuarter-over-Quarter Value Change
- 963,351Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 5 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 963,351 | +60,000 | +6.6% | $310.4M | 3.7% | $322.2 |
| Q4 2025 | 903,351 | +62,500 | +7.4% | $266.3M | 3.4% | $294.7 |
| Q3 2025 | 840,851 | +153,920 | +22.4% | $44.6M | 0.7% | $53.0 |
| Q2 2025 | 686,931 | +67,000 | +10.8% | $28.9M | 0.5% | $42.0 |
| Q1 2025 | 619,931 | — | — | $23.5M | 0.5% | $37.9 |
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 DEERFIELD MANAGEMENT COMPANY, L.P. first disclose a PRAX position in 13F-HR filings?
DEERFIELD MANAGEMENT COMPANY, L.P. first reported PRAXIS PRECISION MEDICINES I (PRAX) on its 13F-HR filing for the period ending 2025-03-31 (Q1 2025). The position has appeared on 5 reported quarters within Pactolio's tracked window.
What was DEERFIELD MANAGEMENT COMPANY, L.P.'s most recent quarter-over-quarter share-count change in PRAX?
Between Q4 2025 and Q1 2026, DEERFIELD MANAGEMENT COMPANY, L.P. added 60,000 shares of PRAX (+6.6%), bringing the total reported position to 963,351 shares at a market value of $310.4M.
Does the implied price-per-share represent DEERFIELD MANAGEMENT COMPANY, L.P.'s cost basis in PRAX?
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.