Bain Capital Life Sciences Investors, LLC
Position in XFOR — X4 Pharmaceuticals, Inc
CIK 1703031
Boston, MA
Position in XFOR
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$37,208,010
+$4,302,425 QoQ
Shares Held
7,967,454
0.0% QoQ
Ownership
8.04%
of shares outstanding
% of Portfolio
2.21%
of 13F equity value
Holder Rank
#3
of 89 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in XFOR Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Bain Capital Life Sciences Investors, LLC holds $1,318,022,438 across 17 Biotechnology names. XFOR ranks #9 (2.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | KLRA |
Kailera Therapeutics, Inc.
|
22,583,268 | $497,509,394 | |
| 2 | NAMS |
NewAmsterdam Pharma Co N.V.
|
3,906,565 | $131,141,499 | |
| 3 | SVRA |
Savara Inc
|
17,600,621 | $108,419,825 | |
| 4 | SLDB |
Solid Biosciences Inc.
|
9,808,819 | $97,990,101 | |
| 5 | PHVS |
Pharvaris N.V.
|
2,675,509 | $92,519,101 | |
| 6 | OLMA |
Olema Pharmaceuticals, Inc.
|
7,085,249 | $88,636,464 | |
| 7 | COAG |
Hemab Therapeutics Holdings, Inc.
|
1,650,000 | $60,604,500 | |
| 8 | CABA |
Cabaletta Bio, Inc.
|
17,241,445 | $53,620,893 |
All Filings in XFOR
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $37,208,010 | 7,967,454 | Shares | Sole | 2026-08-14 | |
| 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 | |
| 2025-03-31 | $3,992,125 | 16,915,784 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $12,416,185 | 16,915,784 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $11,316,659 | 16,915,784 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $9,811,154 | 16,915,784 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $23,512,939 | 16,915,784 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $14,192,342 | 16,915,784 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $17,397,040 | 15,960,588 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $30,963,540 | 15,960,588 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $10,616,183 | 12,202,510 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $12,117,092 | 12,202,510 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $10,925,935 | 6,389,436 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $2,913,856 | 3,019,540 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $5,284,194 | 3,019,540 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $6,610,181 | 2,886,542 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $11,212,366 | 2,119,540 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $13,777,009 | 2,119,540 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $18,249,239 | 2,119,540 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $10,599,758 | 1,648,485 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $11,160,243 | 1,648,485 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $15,363,880 | 1,648,485 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $16,484,849 | 1,648,485 | Shares | Sole | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||