Bain Capital Life Sciences Investors, LLC
Position in XFOR — X4 Pharmaceuticals, Inc
CIK 1703031
Boston, MA
Position in XFOR
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$32,905,585
+$1,035,769 QoQ
Shares Held
7,967,454
0.0% QoQ
Ownership
8.45%
of shares outstanding
% of Portfolio
2.99%
of 13F equity value
Holder Rank
#4
of 82 holders
Holding Since
Jun 2025
4 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in XFOR Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026Bain Capital Life Sciences Investors, LLC holds $806,308,171 across 15 Biotechnology names. XFOR ranks #6 (4.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | NAMS |
NewAmsterdam Pharma Co N.V.
|
7,306,566 | $233,883,177 | |
| 2 | OLMA |
Olema Pharmaceuticals, Inc.
|
7,473,238 | $111,425,978 | |
| 3 | SVRA |
Savara Inc
|
17,600,621 | $96,099,390 | |
| 4 | PHVS |
Pharvaris N.V.
|
2,675,509 | $75,583,129 | |
| 5 | SLDB |
Solid Biosciences Inc.
|
9,808,819 | $70,623,496 | |
| 6 | XFOR |
X4 Pharmaceuticals, Inc
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|
7,967,454 | $32,905,585 | |
| 7 | DNTH |
Dianthus Therapeutics, Inc. /DE/
|
362,470 | $30,418,482 | |
| 8 | ANNX |
Annexon, Inc.
|
5,212,674 | $28,878,213 |
All Filings in XFOR
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4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $32,905,585 | 7,967,454 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $31,869,816 | 7,967,454 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $8,333,130 | 2,436,588 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $1,071,332 | 563,859 | Shares | Sole | 2025-08-14 | |
| No filing history on record for this holder in this stock. | ||||||