Filed: 11/14/2025ACC: 0001193125-25-283094
📋 What this filing means
BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC filed this quarterly 13F‑HR report disclosing 21 equity positions with a total reported market value of $1.51B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
21
Positions
$1.51B
Total AUM (reported)
109.51M
Total Shares
Allocation by class
COM$823.04M54.6%
COM NEW$346.44M23.0%
ORDINARY SHARES$304.85M20.2%
CLASS A COM$28.17M1.9%
COM STK$2.47M0.2%
*W EXP 99/99/999$1.71M0.1%
Portfolio Concentration
Top 3$1.01B67.2%
4–10$383.86M25.5%
11–25$109.67M7.3%
Top 3 weight
67.2%
Top 10 weight
92.7%
Voting Authority Distribution
Total shares with voting rights: 109.51M
Sole
Full voting authority
109.51M
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)
Sole21
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings21
Rows:
HEARTFLOW INC
SOLEShares12.45M
TypeSH
Market value$419.00M
27.81%
Sole
12.45M
Shared
0.00
None
0.00
NEWAMSTERDAM PHARMA COMPANY
SOLEShares10.72M
TypeSH
Market value$304.85M
20.23%
Sole
10.72M
Shared
0.00
None
0.00
CIDARA THERAPEUTICS INC
SOLEShares3.02M
TypeSH
Market value$289.29M
19.20%
Sole
3.02M
Shared
0.00
None
0.00
PHARVARIS N V
SOLEShares3.18M
TypeSH
Market value$79.37M
5.27%
Sole
3.18M
Shared
0.00
None
0.00
OLEMA PHARMACEUTICALS INC
SOLEShares6.84M
TypeSH
Market value$67.00M
4.45%
Sole
6.84M
Shared
0.00
None
0.00
SAVARA INC
SOLEShares17.60M
TypeSH
Market value$62.83M
4.17%
Sole
17.60M
Shared
0.00
None
0.00
DIANTHUS THERAPEUTICS INC
SOLEShares1.32M
TypeSH
Market value$51.78M
3.44%
Sole
1.32M
Shared
0.00
None
0.00
SOLID BIOSCIENCES INC
SOLEShares7.91M
TypeSH
Market value$48.81M
3.24%
Sole
7.91M
Shared
0.00
None
0.00
UPSTREAM BIO INC
SOLEShares2.44M
TypeSH
Market value$45.89M
3.05%
Sole
2.44M
Shared
0.00
None
0.00
RAPID MICRO BIOSYSTEMS INC
SOLEShares8.43M
TypeSH
Market value$28.17M
1.87%
Sole
8.43M
Shared
0.00
None
0.00
TANGO THERAPEUTICS INC
SOLEShares2.71M
TypeSH
Market value$22.78M
1.51%
Sole
2.71M
Shared
0.00
None
0.00
CABALETTA BIO INC
SOLEShares9.68M
TypeSH
Market value$22.64M
1.50%
Sole
9.68M
Shared
0.00
None
0.00
KYVERNA THERAPEUTICS INC
SOLEShares3.37M
TypeSH
Market value$20.21M
1.34%
Sole
3.37M
Shared
0.00
None
0.00
ANNEXON INC
SOLEShares5.25M
TypeSH
Market value$16.01M
1.06%
Sole
5.25M
Shared
0.00
None
0.00
X4 PHARMACEUTICALS INC
SOLEShares2.44M
TypeSH
Market value$8.33M
0.55%
Sole
2.44M
Shared
0.00
None
0.00
ATEA PHARMACEUTICALS INC
SOLEShares2.49M
TypeSH
Market value$7.21M
0.48%
Sole
2.49M
Shared
0.00
None
0.00
XILIO THERAPEUTICS INC
SOLEShares4.57M
TypeSH
Market value$3.85M
0.26%
Sole
4.57M
Shared
0.00
None
0.00
MERSANA THERAPEUTICS INC
SOLEShares346.55K
TypeSH
Market value$2.69M
0.18%
Sole
346.55K
Shared
0.00
None
0.00
C4 THERAPEUTICS INC
SOLEShares1.11M
TypeSH
Market value$2.47M
0.16%
Sole
1.11M
Shared
0.00
None
0.00
CENTURY THERAPEUTICS INC
SOLEShares3.54M
TypeSH
Market value$1.76M
0.12%
Sole
3.54M
Shared
0.00
None
0.00
NEWAMSTERDAM PHARMA COMPANY
SOLEShares100K
TypeSH
Market value$1.71M
0.11%
Sole
100K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
HEARTFLOW INCSOLE | COM | 12.45M | SH | $419.00M 27.81% | 12.45M | 0.00 | 0.00 |
NEWAMSTERDAM PHARMA COMPANYSOLE | ORDINARY SHARES | 10.72M | SH | $304.85M 20.23% | 10.72M | 0.00 | 0.00 |
CIDARA THERAPEUTICS INCSOLE | COM NEW | 3.02M | SH | $289.29M 19.20% | 3.02M | 0.00 | 0.00 |
PHARVARIS N VSOLE | COM | 3.18M | SH | $79.37M 5.27% | 3.18M | 0.00 | 0.00 |
OLEMA PHARMACEUTICALS INCSOLE | COM | 6.84M | SH | $67.00M 4.45% | 6.84M | 0.00 | 0.00 |
SAVARA INCSOLE | COM | 17.60M | SH | $62.83M 4.17% | 17.60M | 0.00 | 0.00 |
DIANTHUS THERAPEUTICS INCSOLE | COM | 1.32M | SH | $51.78M 3.44% | 1.32M | 0.00 | 0.00 |
SOLID BIOSCIENCES INCSOLE | COM NEW | 7.91M | SH | $48.81M 3.24% | 7.91M | 0.00 | 0.00 |
UPSTREAM BIO INCSOLE | COM | 2.44M | SH | $45.89M 3.05% | 2.44M | 0.00 | 0.00 |
RAPID MICRO BIOSYSTEMS INCSOLE | CLASS A COM | 8.43M | SH | $28.17M 1.87% | 8.43M | 0.00 | 0.00 |
TANGO THERAPEUTICS INCSOLE | COM | 2.71M | SH | $22.78M 1.51% | 2.71M | 0.00 | 0.00 |
CABALETTA BIO INCSOLE | COM | 9.68M | SH | $22.64M 1.50% | 9.68M | 0.00 | 0.00 |
KYVERNA THERAPEUTICS INCSOLE | COM | 3.37M | SH | $20.21M 1.34% | 3.37M | 0.00 | 0.00 |
ANNEXON INCSOLE | COM | 5.25M | SH | $16.01M 1.06% | 5.25M | 0.00 | 0.00 |
X4 PHARMACEUTICALS INCSOLE | COM NEW | 2.44M | SH | $8.33M 0.55% | 2.44M | 0.00 | 0.00 |
ATEA PHARMACEUTICALS INCSOLE | COM | 2.49M | SH | $7.21M 0.48% | 2.49M | 0.00 | 0.00 |
XILIO THERAPEUTICS INCSOLE | COM | 4.57M | SH | $3.85M 0.26% | 4.57M | 0.00 | 0.00 |
MERSANA THERAPEUTICS INCSOLE | COM | 346.55K | SH | $2.69M 0.18% | 346.55K | 0.00 | 0.00 |
C4 THERAPEUTICS INCSOLE | COM STK | 1.11M | SH | $2.47M 0.16% | 1.11M | 0.00 | 0.00 |
CENTURY THERAPEUTICS INCSOLE | COM | 3.54M | SH | $1.76M 0.12% | 3.54M | 0.00 | 0.00 |
NEWAMSTERDAM PHARMA COMPANYSOLE | *W EXP 99/99/999 | 100K | SH | $1.71M 0.11% | 100K | 0.00 | 0.00 |