Bain Capital Life Sciences Investors, LLC Long-Term Concentrated

Name: Bain Capital Life Sciences Investors, LLC Q2 2025 13F Filing | 13F Explorer
Creator: Bain Capital Life Sciences Investors, LLC
Published: 2025-08-14

Location: Boston, MA

CIK: 0001703031 · Show all filings

Period: Q2 2025 (← Previous) (Next →)

Filing Date: Aug 14, 2025

Total Value: $799M (100.0% shares, 0.0% debt)

Holdings (23)

NAMS NEWAMSTERDAM PHARMA COMPANY 24.3%

Value $194M Shares 10,719,110 Est. Cost $10.88 Unrealized +67.6%

— CIDARA THERAPEUTICS INC 15.2%

Value $122M Shares 2,500,680 Est. Cost $38.04 Unrealized —

NUVL NUVALENT INC 13.8%

Value $110M Shares 1,447,267 Est. Cost $28.96 Unrealized +152.6%

PHVS PHARVARIS N V 7.3%

Value $58.14M Shares 3,303,381 Est. Cost $23.89 Unrealized -32.6%

DNTH DIANTHUS THERAPEUTICS INC 5.8%

Value $46.24M Shares 2,482,250 Est. Cost $21.73 Unrealized -13.7%

SVRA SAVARA INC 5.0%

Value $40.13M Shares 17,600,621 Est. Cost $2.08 Unrealized +30.9%

SLDB SOLID BIOSCIENCES INC 4.8%

Value $38.53M Shares 7,911,669 Est. Cost $5.76 Unrealized -38.6%

IRON DISC MEDICINE INC 3.9%

Value $30.9M Shares 583,500 Est. Cost $25.40 Unrealized +85.0%

OLMA OLEMA PHARMACEUTICALS INC 3.6%

Value $29.16M Shares 6,843,954 Est. Cost $9.99 Unrealized -55.4%

RPID RAPID MICRO BIOSYSTEMS INC 3.6%

Value $29.1M Shares 8,434,560 Est. Cost $20.66 Unrealized -85.9%

UPB UPSTREAM BIO INC 3.4%

Value $26.79M Shares 2,439,538 Est. Cost $21.55 Unrealized -57.2%

CABA CABALETTA BIO INC 1.8%

Value $14.71M Shares 9,677,125 Est. Cost $3.63 Unrealized -57.1%

TNGX TANGO THERAPEUTICS INC 1.7%

Value $13.89M Shares 2,712,008 Est. Cost $10.01 Unrealized -75.3%

ANNX ANNEXON INC 1.6%

Value $12.6M Shares 5,249,069 Est. Cost $11.24 Unrealized -82.2%

KYTX KYVERNA THERAPEUTICS INC 1.3%

Value $10.34M Shares 3,368,370 Est. Cost $27.08 Unrealized -90.9%

AVIR ATEA PHARMACEUTICALS INC 1.1%

Value $8.948M Shares 2,485,638 Est. Cost $32.23 Unrealized -90.7%

XLO XILIO THERAPEUTICS INC 0.4%

Value $3.105M Shares 4,566,817 Est. Cost $10.85 Unrealized -93.0%

IPSC CENTURY THERAPEUTICS INC 0.4%

Value $3.023M Shares 5,410,361 Est. Cost $3.16 Unrealized -83.0%

— MERSANA THERAPEUTICS INC 0.3%

Value $2.564M Shares 8,663,673 Est. Cost $12.65 Unrealized —

CCCC C4 THERAPEUTICS INC 0.2%

Value $1.59M Shares 1,111,910 Est. Cost $29.00 Unrealized -95.0%

IVVD INVIVYD INC 0.2%

Value $1.287M Shares 1,799,595 Est. Cost $37.11 Unrealized -98.1%

XFOR X4 PHARMACEUTICALS INC 0.1%

Value $1.071M Shares 563,859 Est. Cost $4.09 Unrealized 0.0%

NAMSW NEWAMSTERDAM PHARMA COMPANY 0.1%

Value $800K Shares 100,000 Est. Cost $0.86 Unrealized —

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
NAMS	NEWAMSTERDAM PHARMA COMPANY	10,719,110	$194M	24.3%	$10.88	+67.6%	ORDINARY SHARES	N62509109
—	CIDARA THERAPEUTICS INC	2,500,680	$122M	15.2%	$38.04	—	COM NEW	171757206
NUVL	NUVALENT INC	1,447,267	$110M	13.8%	$28.96	+152.6%	COM	670703107
PHVS	PHARVARIS N V	3,303,381	$58.14M	7.3%	$23.89	-32.6%	COM	N69605108
DNTH	DIANTHUS THERAPEUTICS INC	2,482,250	$46.24M	5.8%	$21.73	-13.7%	COM	252828108
SVRA	SAVARA INC	17,600,621	$40.13M	5.0%	$2.08	+30.9%	COM	805111101
SLDB	SOLID BIOSCIENCES INC	7,911,669	$38.53M	4.8%	$5.76	-38.6%	COM NEW	83422E204
IRON	DISC MEDICINE INC	583,500	$30.9M	3.9%	$25.40	+85.0%	COM	254604101
OLMA	OLEMA PHARMACEUTICALS INC	6,843,954	$29.16M	3.6%	$9.99	-55.4%	COM	68062P106
RPID	RAPID MICRO BIOSYSTEMS INC	8,434,560	$29.1M	3.6%	$20.66	-85.9%	CLASS A COM	75340L104
UPB	UPSTREAM BIO INC	2,439,538	$26.79M	3.4%	$21.55	-57.2%	COM	91678A107
CABA	CABALETTA BIO INC	9,677,125	$14.71M	1.8%	$3.63	-57.1%	COM	12674W109
TNGX	TANGO THERAPEUTICS INC	2,712,008	$13.89M	1.7%	$10.01	-75.3%	COM	87583X109
ANNX	ANNEXON INC	5,249,069	$12.6M	1.6%	$11.24	-82.2%	COM	03589W102
KYTX	KYVERNA THERAPEUTICS INC	3,368,370	$10.34M	1.3%	$27.08	-90.9%	COM	501976104
AVIR	ATEA PHARMACEUTICALS INC	2,485,638	$8.948M	1.1%	$32.23	-90.7%	COM	04683R106
XLO	XILIO THERAPEUTICS INC	4,566,817	$3.105M	0.4%	$10.85	-93.0%	COM	98422T100
IPSC	CENTURY THERAPEUTICS INC	5,410,361	$3.023M	0.4%	$3.16	-83.0%	COM	15673T100
—	MERSANA THERAPEUTICS INC	8,663,673	$2.564M	0.3%	$12.65	—	COM	59045L106
CCCC	C4 THERAPEUTICS INC	1,111,910	$1.59M	0.2%	$29.00	-95.0%	COM STK	12529R107
IVVD	INVIVYD INC	1,799,595	$1.287M	0.2%	$37.11	-98.1%	COM	00534A102
XFOR	X4 PHARMACEUTICALS INC	563,859	$1.071M	0.1%	$4.09	0.0%	COM NEW	98420X202
NAMSW	NEWAMSTERDAM PHARMA COMPANY	100,000	$800K	0.1%	$0.86	—	*W EXP 99/99/999	N62509117