Filed: 5/15/2026ACC: 0001193125-26-226961
📋 What this filing means
BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC filed this quarterly 13F‑HR report disclosing 20 equity positions with a total reported market value of $1.11B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
20
Positions
$1.11B
Total AUM (reported)
102.63M
Total Shares
Allocation by class
COM$684.60M61.7%
ORDINARY SHARES$233.88M21.1%
COM NEW$103.53M9.3%
SPONSORED ADS$25.22M2.3%
SHS$21.57M1.9%
CLASS A COM$19.15M1.7%
COM STK$18.86M1.7%
Portfolio Concentration
Top 3$599.51M54.1%
4–10$361.35M32.6%
11–25$147.96M13.3%
Top 3 weight
54.1%
Top 10 weight
86.7%
Voting Authority Distribution
Total shares with voting rights: 102.63M
Sole
Full voting authority
102.63M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole20
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings20
Rows:
HEARTFLOW INC
SOLEShares10.45M
TypeSH
Market value$254.20M
22.93%
Sole
10.45M
Shared
0.00
None
0.00
NEWAMSTERDAM PHARMA COMPANY
SOLEShares7.31M
TypeSH
Market value$233.88M
21.09%
Sole
7.31M
Shared
0.00
None
0.00
OLEMA PHARMACEUTICALS INC
SOLEShares7.47M
TypeSH
Market value$111.43M
10.05%
Sole
7.47M
Shared
0.00
None
0.00
SAVARA INC
SOLEShares17.60M
TypeSH
Market value$96.10M
8.67%
Sole
17.60M
Shared
0.00
None
0.00
PHARVARIS N V
SOLEShares2.68M
TypeSH
Market value$75.58M
6.82%
Sole
2.68M
Shared
0.00
None
0.00
SOLID BIOSCIENCES INC
SOLEShares9.81M
TypeSH
Market value$70.62M
6.37%
Sole
9.81M
Shared
0.00
None
0.00
X4 PHARMACEUTICALS INC
SOLEShares7.97M
TypeSH
Market value$32.91M
2.97%
Sole
7.97M
Shared
0.00
None
0.00
DIANTHUS THERAPEUTICS INC
SOLEShares362.47K
TypeSH
Market value$30.42M
2.74%
Sole
362.47K
Shared
0.00
None
0.00
ANNEXON INC
SOLEShares5.21M
TypeSH
Market value$28.88M
2.60%
Sole
5.21M
Shared
0.00
None
0.00
KYVERNA THERAPEUTICS INC
SOLEShares3.11M
TypeSH
Market value$26.84M
2.42%
Sole
3.11M
Shared
0.00
None
0.00
CABALETTA BIO INC
SOLEShares9.68M
TypeSH
Market value$26.03M
2.35%
Sole
9.68M
Shared
0.00
None
0.00
CENTESSA PHARMACEUTICALS
SOLEShares635K
TypeSH
Market value$25.22M
2.27%
Sole
635K
Shared
0.00
None
0.00
ALKERMES PLC
SOLEShares610K
TypeSH
Market value$21.57M
1.95%
Sole
610K
Shared
0.00
None
0.00
RAPID MICRO BIOSYSTEMS INC
SOLEShares8.43M
TypeSH
Market value$19.15M
1.73%
Sole
8.43M
Shared
0.00
None
0.00
C4 THERAPEUTICS INC
SOLEShares7.17M
TypeSH
Market value$18.86M
1.70%
Sole
7.17M
Shared
0.00
None
0.00
ATEA PHARMACEUTICALS INC
SOLEShares2.36M
TypeSH
Market value$12.70M
1.15%
Sole
2.36M
Shared
0.00
None
0.00
DISC MEDICINE INC
SOLEShares141.23K
TypeSH
Market value$9.03M
0.81%
Sole
141.23K
Shared
0.00
None
0.00
UPSTREAM BIO INC
SOLEShares867.21K
TypeSH
Market value$7.80M
0.70%
Sole
867.21K
Shared
0.00
None
0.00
XILIO THERAPEUTICS INC
SOLEShares664.02K
TypeSH
Market value$5.58M
0.50%
Sole
664.02K
Shared
0.00
None
0.00
NEWAMSTERDAM PHARMA COMPANY
SOLEShares100K
TypeSH
Market value$2.00M
0.18%
Sole
100K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
HEARTFLOW INCSOLE | COM | 10.45M | SH | $254.20M 22.93% | 10.45M | 0.00 | 0.00 |
NEWAMSTERDAM PHARMA COMPANYSOLE | ORDINARY SHARES | 7.31M | SH | $233.88M 21.09% | 7.31M | 0.00 | 0.00 |
OLEMA PHARMACEUTICALS INCSOLE | COM | 7.47M | SH | $111.43M 10.05% | 7.47M | 0.00 | 0.00 |
SAVARA INCSOLE | COM | 17.60M | SH | $96.10M 8.67% | 17.60M | 0.00 | 0.00 |
PHARVARIS N VSOLE | COM | 2.68M | SH | $75.58M 6.82% | 2.68M | 0.00 | 0.00 |
SOLID BIOSCIENCES INCSOLE | COM NEW | 9.81M | SH | $70.62M 6.37% | 9.81M | 0.00 | 0.00 |
X4 PHARMACEUTICALS INCSOLE | COM NEW | 7.97M | SH | $32.91M 2.97% | 7.97M | 0.00 | 0.00 |
DIANTHUS THERAPEUTICS INCSOLE | COM | 362.47K | SH | $30.42M 2.74% | 362.47K | 0.00 | 0.00 |
ANNEXON INCSOLE | COM | 5.21M | SH | $28.88M 2.60% | 5.21M | 0.00 | 0.00 |
KYVERNA THERAPEUTICS INCSOLE | COM | 3.11M | SH | $26.84M 2.42% | 3.11M | 0.00 | 0.00 |
CABALETTA BIO INCSOLE | COM | 9.68M | SH | $26.03M 2.35% | 9.68M | 0.00 | 0.00 |
CENTESSA PHARMACEUTICALSSOLE | SPONSORED ADS | 635K | SH | $25.22M 2.27% | 635K | 0.00 | 0.00 |
ALKERMES PLCSOLE | SHS | 610K | SH | $21.57M 1.95% | 610K | 0.00 | 0.00 |
RAPID MICRO BIOSYSTEMS INCSOLE | CLASS A COM | 8.43M | SH | $19.15M 1.73% | 8.43M | 0.00 | 0.00 |
C4 THERAPEUTICS INCSOLE | COM STK | 7.17M | SH | $18.86M 1.70% | 7.17M | 0.00 | 0.00 |
ATEA PHARMACEUTICALS INCSOLE | COM | 2.36M | SH | $12.70M 1.15% | 2.36M | 0.00 | 0.00 |
DISC MEDICINE INCSOLE | COM | 141.23K | SH | $9.03M 0.81% | 141.23K | 0.00 | 0.00 |
UPSTREAM BIO INCSOLE | COM | 867.21K | SH | $7.80M 0.70% | 867.21K | 0.00 | 0.00 |
XILIO THERAPEUTICS INCSOLE | COM | 664.02K | SH | $5.58M 0.50% | 664.02K | 0.00 | 0.00 |
NEWAMSTERDAM PHARMA COMPANYSOLE | *W EXP 99/99/999 | 100K | SH | $2.00M 0.18% | 100K | 0.00 | 0.00 |