Saturn V Capital Management LP: X4 PHARMACEUTICALS INC (XFOR): Quarterly 13F Position History
As of Q1 2026, Saturn V Capital Management LP reported 6,456,646 shares of X4 PHARMACEUTICALS INC (XFOR), worth $26.7M and representing 4.8% of its 13F equity book. Quarter-over-quarter share count change: + 656,116 (+11.3%) . The position first appeared in Q4 2025 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 6,456,646Shares Held (Latest Filing)
- $26.7MReported Market Value (Latest Filing)
- 4.8%Portfolio Weight (% of 13F Equity Book)
- +656,116Quarter-over-Quarter Share Change
- +$3.5MQuarter-over-Quarter Value Change
- 6,456,646Peak Reported Shares (Historical)
Recent initiation: Saturn V Capital Management LP first reported XFOR on the Q4 2025 filing — fewer than three quarters of history are available.
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 2 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 6,456,646 | +656,116 | +11.3% | $26.7M | 4.8% | $4.1 |
| Q4 2025 | 5,800,530 | — | — | $23.2M | 4.3% | $4.0 |
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 Saturn V Capital Management LP first disclose a XFOR position in 13F-HR filings?
Saturn V Capital Management LP first reported X4 PHARMACEUTICALS INC (XFOR) on its 13F-HR filing for the period ending 2025-12-31 (Q4 2025). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was Saturn V Capital Management LP's most recent quarter-over-quarter share-count change in XFOR?
Between Q4 2025 and Q1 2026, Saturn V Capital Management LP added 656,116 shares of XFOR (+11.3%), bringing the total reported position to 6,456,646 shares at a market value of $26.7M.
Does the implied price-per-share represent Saturn V Capital Management LP's cost basis in XFOR?
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.