Bain Capital Life Sciences Investors, LLC Long-Term Concentrated

Name: Bain Capital Life Sciences Investors, LLC Q3 2025 13F Filing | 13F Explorer
Creator: Bain Capital Life Sciences Investors, LLC
Published: 2025-11-14

Location: Boston, MA

CIK: 0001703031 · Show all filings

Period: Q3 2025 (← Previous) (Next →)

Filing Date: Nov 14, 2025

Total Value: $1.507B (100.0% shares, 0.0% debt)

Holdings (21)

HTFL HEARTFLOW INC 27.8%

Value $419M Shares 12,448,158 Est. Cost $32.24 Unrealized 0.0%

NAMS NEWAMSTERDAM PHARMA COMPANY 20.2%

Value $305M Shares 10,719,110 Est. Cost $10.88 Unrealized +120.3%

— CIDARA THERAPEUTICS INC 19.2%

Value $289M Shares 3,020,990 Est. Cost $47.98 Unrealized —

PHVS PHARVARIS N V 5.3%

Value $79.37M Shares 3,181,275 Est. Cost $23.89 Unrealized -7.2%

OLMA OLEMA PHARMACEUTICALS INC 4.4%

Value $67M Shares 6,843,954 Est. Cost $9.99 Unrealized -39.9%

SVRA SAVARA INC 4.2%

Value $62.83M Shares 17,600,621 Est. Cost $2.08 Unrealized +42.3%

DNTH DIANTHUS THERAPEUTICS INC 3.4%

Value $51.78M Shares 1,315,892 Est. Cost $21.73 Unrealized +17.6%

SLDB SOLID BIOSCIENCES INC 3.2%

Value $48.81M Shares 7,911,669 Est. Cost $5.76 Unrealized +1.5%

UPB UPSTREAM BIO INC 3.0%

Value $45.89M Shares 2,439,538 Est. Cost $21.55 Unrealized -27.9%

RPID RAPID MICRO BIOSYSTEMS INC 1.9%

Value $28.17M Shares 8,434,560 Est. Cost $20.66 Unrealized -84.7%

TNGX TANGO THERAPEUTICS INC 1.5%

Value $22.78M Shares 2,712,008 Est. Cost $10.01 Unrealized -32.4%

CABA CABALETTA BIO INC 1.5%

Value $22.64M Shares 9,677,125 Est. Cost $3.63 Unrealized -52.8%

KYTX KYVERNA THERAPEUTICS INC 1.3%

Value $20.21M Shares 3,368,370 Est. Cost $27.08 Unrealized -85.2%

ANNX ANNEXON INC 1.1%

Value $16.01M Shares 5,249,069 Est. Cost $11.24 Unrealized -77.9%

XFOR X4 PHARMACEUTICALS INC 0.6%

Value $8.333M Shares 2,436,588 Est. Cost $2.93 Unrealized -12.0%

AVIR ATEA PHARMACEUTICALS INC 0.5%

Value $7.208M Shares 2,485,638 Est. Cost $32.23 Unrealized -89.4%

XLO XILIO THERAPEUTICS INC 0.3%

Value $3.848M Shares 4,566,817 Est. Cost $10.85 Unrealized -93.4%

— MERSANA THERAPEUTICS INC 0.2%

Value $2.689M Shares 346,545 Est. Cost $7.76 Unrealized —

CCCC C4 THERAPEUTICS INC 0.2%

Value $2.468M Shares 1,111,910 Est. Cost $29.00 Unrealized -91.7%

IPSC CENTURY THERAPEUTICS INC 0.1%

Value $1.762M Shares 3,538,609 Est. Cost $3.16 Unrealized -82.9%

NAMSW NEWAMSTERDAM PHARMA COMPANY 0.1%

Value $1.711M Shares 100,000 Est. Cost $0.86 Unrealized —

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
HTFL	HEARTFLOW INC	12,448,158	$419M	27.8%	$32.24	0.0%	COM	42238D107
NAMS	NEWAMSTERDAM PHARMA COMPANY	10,719,110	$305M	20.2%	$10.88	+120.3%	ORDINARY SHARES	N62509109
—	CIDARA THERAPEUTICS INC	3,020,990	$289M	19.2%	$47.98	—	COM NEW	171757206
PHVS	PHARVARIS N V	3,181,275	$79.37M	5.3%	$23.89	-7.2%	COM	N69605108
OLMA	OLEMA PHARMACEUTICALS INC	6,843,954	$67M	4.4%	$9.99	-39.9%	COM	68062P106
SVRA	SAVARA INC	17,600,621	$62.83M	4.2%	$2.08	+42.3%	COM	805111101
DNTH	DIANTHUS THERAPEUTICS INC	1,315,892	$51.78M	3.4%	$21.73	+17.6%	COM	252828108
SLDB	SOLID BIOSCIENCES INC	7,911,669	$48.81M	3.2%	$5.76	+1.5%	COM NEW	83422E204
UPB	UPSTREAM BIO INC	2,439,538	$45.89M	3.0%	$21.55	-27.9%	COM	91678A107
RPID	RAPID MICRO BIOSYSTEMS INC	8,434,560	$28.17M	1.9%	$20.66	-84.7%	CLASS A COM	75340L104
TNGX	TANGO THERAPEUTICS INC	2,712,008	$22.78M	1.5%	$10.01	-32.4%	COM	87583X109
CABA	CABALETTA BIO INC	9,677,125	$22.64M	1.5%	$3.63	-52.8%	COM	12674W109
KYTX	KYVERNA THERAPEUTICS INC	3,368,370	$20.21M	1.3%	$27.08	-85.2%	COM	501976104
ANNX	ANNEXON INC	5,249,069	$16.01M	1.1%	$11.24	-77.9%	COM	03589W102
XFOR	X4 PHARMACEUTICALS INC	2,436,588	$8.333M	0.6%	$2.93	-12.0%	COM NEW	98420X202
AVIR	ATEA PHARMACEUTICALS INC	2,485,638	$7.208M	0.5%	$32.23	-89.4%	COM	04683R106
XLO	XILIO THERAPEUTICS INC	4,566,817	$3.848M	0.3%	$10.85	-93.4%	COM	98422T100
—	MERSANA THERAPEUTICS INC	346,545	$2.689M	0.2%	$7.76	—	COM	59045L205
CCCC	C4 THERAPEUTICS INC	1,111,910	$2.468M	0.2%	$29.00	-91.7%	COM STK	12529R107
IPSC	CENTURY THERAPEUTICS INC	3,538,609	$1.762M	0.1%	$3.16	-82.9%	COM	15673T100
NAMSW	NEWAMSTERDAM PHARMA COMPANY	100,000	$1.711M	0.1%	$0.86	—	*W EXP 99/99/999	N62509117