Institutions / Bain Capital Life Sciences Investors, LLC

Bain Capital Life Sciences Investors, LLC

CIK 1703031 · Institutionalso an insider · as of Dec 31, 2025
Portfolio value
$1.31B
Positions
19
As of
Dec 31, 2025

Top holdings

Dec 31, 2025
CompanyClassValueShares% of portfolio
Heartflow, Inc.—$362.86M12,448,15827.8%
Newamsterdam Pharma Company—$256.31M7,306,56619.6%
Olema Pharmaceuticals, Inc.—$212.72M8,508,64116.3%
Savara IncSVRACommon Stock$106.13M17,600,6218.1%
Pharvaris N.V.—$77.76M2,802,0816.0%
Solid Biosciences Inc.SLDBCommon Stock$44.62M7,911,6693.4%
Upstream Bio, Inc.UPBCommon Stock$36.10M1,329,5442.8%
X4 Pharmaceuticals, Inc—$31.87M7,967,4542.4%
Dianthus Therapeutics, Inc.—$30.64M743,5922.3%
Kyverna Therapeutics, Inc.KYTXCommon Stock$29.23M3,110,0002.2%
Annexon, Inc.—$26.35M5,249,0692.0%
Rapid Micro Biosystems, Inc.—$24.46M8,434,5601.9%
Cabaletta Bio, Inc.—$21.19M9,677,1251.6%
C4 Therapeutics, Inc.CCCCCommon Stock$13.70M7,171,9101.0%
Mersana Therapeutics Inc—$10.03M346,5450.8%
Atea Pharmaceuticals, Inc.—$8.87M2,485,6380.7%
Tango Therapeutics, Inc.—$5.79M653,4930.4%
Xilio Therapeutics Inc—$4.72M7,372,6860.4%
Newamsterdam Pharma Company—$2.30M99,9990.2%

Activity

Dec 31, 2025
InsidersInstitutions
This fund's 13F position changes — what it's buying and selling.
No quarter-over-quarter changes yet — position changes appear once we've ingested two consecutive 13F filings for this manager. We currently hold 1 quarter of holdings.

Insider transactions

Also files Forms 3 / 4 / 5
DateActionCompanyValueShares ΔPosition afterImpact
Feb 4, 2026SellHTFL
Heartflow, Inc.
Common Stock
$56.10M-2.0M
-16.07%
10,448,158
12.12% of shares
high
May 20, 2026BuyRPID
Rapid Micro Biosystems, Inc.
Series B Warrant (right to buy)
—+1.5M
1,463,000
2.92% of shares
low
May 20, 2026BuyRPID
Rapid Micro Biosystems, Inc.
Series A Warrant (right to buy)
—+1.5M
1,463,000
2.92% of shares
low
May 20, 2026BuyRPID
Rapid Micro Biosystems, Inc.
Pre-Funded Warrant (right to buy)
—+1.5M
1,463,000
2.92% of shares
low