Bain Capital Life Sciences Investors, LLC Long-Term Concentrated

Name: Bain Capital Life Sciences Investors, LLC Q2 2026 13F Filing | 13F Explorer
Creator: Bain Capital Life Sciences Investors, LLC
Published: 2026-08-14

Location: Boston, MA

CIK: 0001703031 · Show all filings

Period: Q2 2026 (← Previous)

Filing Date: Aug 14, 2026

Total Value: $1.682B (100.0% shares, 0.0% debt)

Holdings (21)

KLRA KAILERA THERAPEUTICS INC 29.6%

Value $498M Shares 22,583,268 Est. Cost — Unrealized —

HTFL HEARTFLOW INC 14.7%

Value $248M Shares 8,448,158 Est. Cost — Unrealized —

NAMS NEWAMSTERDAM PHARMA COMPANY 7.7%

Value $129M Shares 3,806,566 Est. Cost — Unrealized —

SVRA SAVARA INC 6.4%

Value $108M Shares 17,600,621 Est. Cost — Unrealized —

ALKS ALKERMES PLC 6.0%

Value $102M Shares 1,937,938 Est. Cost — Unrealized —

SLDB SOLID BIOSCIENCES INC 5.8%

Value $97.99M Shares 9,808,819 Est. Cost — Unrealized —

PHVS PHARVARIS N V 5.5%

Value $92.52M Shares 2,675,509 Est. Cost — Unrealized —

OLMA OLEMA PHARMACEUTICALS INC 5.3%

Value $88.64M Shares 7,085,249 Est. Cost — Unrealized —

COAG HEMAB THERAPEUTICS HOLDINGS INC 3.6%

Value $60.6M Shares 1,650,000 Est. Cost — Unrealized —

CABA CABALETTA BIO INC 3.2%

Value $53.62M Shares 17,241,445 Est. Cost — Unrealized —

XFOR X4 PHARMACEUTICALS INC 2.2%

Value $37.21M Shares 7,967,454 Est. Cost — Unrealized —

DNTH DIANTHUS THERAPEUTICS INC 2.1%

Value $35.33M Shares 362,470 Est. Cost — Unrealized —

CCCC C4 THERAPEUTICS INC 2.0%

Value $33.49M Shares 7,171,910 Est. Cost — Unrealized —

KYTX KYVERNA THERAPEUTICS INC 1.5%

Value $25.71M Shares 2,885,000 Est. Cost — Unrealized —

ANNX ANNEXON INC 1.5%

Value $25.34M Shares 4,437,731 Est. Cost — Unrealized —

RPID RAPID MICRO BIOSYSTEMS INC 0.9%

Value $14.59M Shares 8,434,560 Est. Cost — Unrealized —

IRON DISC MEDICINE INC 0.6%

Value $10.33M Shares 141,234 Est. Cost — Unrealized —

AVIR ATEA PHARMACEUTICALS INC 0.6%

Value $9.652M Shares 2,075,639 Est. Cost — Unrealized —

XLO XILIO THERAPEUTICS INC 0.4%

Value $6.361M Shares 664,021 Est. Cost — Unrealized —

UPB UPSTREAM BIO INC 0.2%

Value $4.159M Shares 600,949 Est. Cost — Unrealized —

NAMSW NEWAMSTERDAM PHARMA COMPANY 0.1%

Value $2.137M Shares 99,999 Est. Cost — Unrealized —

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
KLRA	KAILERA THERAPEUTICS INC	22,583,268	$498M	29.6%	—	—	COMMON STOCK	482931102
HTFL	HEARTFLOW INC	8,448,158	$248M	14.7%	—	—	COM	42238D107
NAMS	NEWAMSTERDAM PHARMA COMPANY	3,806,566	$129M	7.7%	—	—	ORDINARY SHARES	N62509109
SVRA	SAVARA INC	17,600,621	$108M	6.4%	—	—	COM	805111101
ALKS	ALKERMES PLC	1,937,938	$102M	6.0%	—	—	SHS	G01767105
SLDB	SOLID BIOSCIENCES INC	9,808,819	$97.99M	5.8%	—	—	COM NEW	83422E204
PHVS	PHARVARIS N V	2,675,509	$92.52M	5.5%	—	—	COM	N69605108
OLMA	OLEMA PHARMACEUTICALS INC	7,085,249	$88.64M	5.3%	—	—	COM	68062P106
COAG	HEMAB THERAPEUTICS HOLDINGS INC	1,650,000	$60.6M	3.6%	—	—	COM SHS	423494103
CABA	CABALETTA BIO INC	17,241,445	$53.62M	3.2%	—	—	COM	12674W109
XFOR	X4 PHARMACEUTICALS INC	7,967,454	$37.21M	2.2%	—	—	COM NEW	98420X202
DNTH	DIANTHUS THERAPEUTICS INC	362,470	$35.33M	2.1%	—	—	COM	252828108
CCCC	C4 THERAPEUTICS INC	7,171,910	$33.49M	2.0%	—	—	COM STK	12529R107
KYTX	KYVERNA THERAPEUTICS INC	2,885,000	$25.71M	1.5%	—	—	COM	501976104
ANNX	ANNEXON INC	4,437,731	$25.34M	1.5%	—	—	COM	03589W102
RPID	RAPID MICRO BIOSYSTEMS INC	8,434,560	$14.59M	0.9%	—	—	CLASS A COM	75340L104
IRON	DISC MEDICINE INC	141,234	$10.33M	0.6%	—	—	COM	254604101
AVIR	ATEA PHARMACEUTICALS INC	2,075,639	$9.652M	0.6%	—	—	COM	04683R106
XLO	XILIO THERAPEUTICS INC	664,021	$6.361M	0.4%	—	—	COM	98422T209
UPB	UPSTREAM BIO INC	600,949	$4.159M	0.2%	—	—	COM	91678A107
NAMSW	NEWAMSTERDAM PHARMA COMPANY	99,999	$2.137M	0.1%	—	—	*W EXP 99/99/999	N62509117