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Latest Bain Capital Life Sciences Investors, LLC Stock Portfolio

$1.68Billion | No. of Holdings #21

Bain Capital Life Sciences Investors, LLC Performance

2026 Q2+8.38%
YTD-2.73%
2025+38.51%

About Bain Capital Life Sciences Investors, LLC and 13F Hedge Fund Stock Holdings

On 2026-08-14, the fund reported it's updated stock portfolio. In the 13F Holdings report, Bain Capital Life Sciences Investors, LLC reported an equity portfolio of $1.7 Billions as of 30 Jun, 2026. <br><br> The top stock holdings of Bain Capital Life Sciences Investors, LLC are , , NAMS. The fund has invested 29.6% of it's portfolio in KAILERA THERAPEUTICS INC and 14.7% of portfolio in HEARTFLOW INC. <br><br> The fund managers got completely rid off CENTESSA PHARMACEUTICALS (CNTA) stocks. They significantly reduced their stock positions in NEWAMSTERDAM PHARMA COMPANY (NAMS), UPSTREAM BIO INC and ANNEXON INC (ANNX). Bain Capital Life Sciences Investors, LLC opened new stock positions in KAILERA THERAPEUTICS INC. The fund showed a lot of confidence in some stocks as they added substantially to ALKERMES PLC (ALKS) and CABALETTA BIO INC (CABA).
Bain Capital Life Sciences Investors, LLC Equity Portfolio Value
Last Reported on: 14 Aug, 2026
$1.68Billion
  as of Aug 14, 2026

Bain Capital Life Sciences Investors, LLC Annual Return Estimates Vs S&P 500

Our best estimate is that Bain Capital Life Sciences Investors, LLC made a return of 8.38% in the last quarter. In trailing 12 months, it's portfolio return was 56.62%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
kailera therapeutics inc497,509,000
hemab therapeutics holdings inc60,604,500
New stocks bought by Bain Capital Life Sciences Investors, LLC

Additions

Ticker% Inc.
alkermes plc217
cabaletta bio inc78.17
Additions to existing portfolio by Bain Capital Life Sciences Investors, LLC

Reductions

Ticker% Reduced
newamsterdam pharma company-47.9
upstream bio inc-30.7
heartflow inc-19.14
annexon inc-14.87
atea pharmaceuticals inc-12.07
kyverna therapeutics inc-7.23
olema pharmaceuticals inc-5.19
Bain Capital Life Sciences Investors, LLC reduced stake in above stock

Sold off

Ticker$ Sold
centessa pharmaceuticals-25,222,200
Bain Capital Life Sciences Investors, LLC got rid off the above stocks

Sector Distribution

Bain Capital Life Sciences Investors, LLC has about 65.7% of it's holdings in Others sector.

  • Others
  • Healthcare
Sector%
Others65.7
Healthcare34.3

Market Cap. Distribution

Bain Capital Life Sciences Investors, LLC has about 0% of it's portfolio invested in the large-cap and mega-cap stocks.

  • UNALLOCATED
  • SMALL-CAP
  • MID-CAP
  • MICRO-CAP
Category%
UNALLOCATED65.7
SMALL-CAP27
MID-CAP6
MICRO-CAP1.2

Stocks belong to which Index?

About 25.2% of the stocks held by Bain Capital Life Sciences Investors, LLC either belong to S&P 500 or RUSSELL 2000 index.

  • Others
  • RUSSELL 2000
Index%
Others74.8
RUSSELL 200025.2
Top 5 Winners (%)%
CCCC
c4 therapeutics inc
77.6 %
SLDB
solid biosciences inc
38.8 %
ALKS
alkermes plc
27.2 %
PHVS
pharvaris n v
22.4 %
heartflow inc
18.6 %
Top 5 Winners ($)$
heartflow inc
47.3 M
SLDB
solid biosciences inc
27.4 M
ALKS
alkermes plc
21.7 M
PHVS
pharvaris n v
16.9 M
CCCC
c4 therapeutics inc
14.6 M
Top 5 Losers (%)%
RPID
rapid micro biosystems inc
-23.8 %
upstream bio inc
-19.6 %
OLMA
olema pharmaceuticals inc
-15.7 %
AVIR
atea pharmaceuticals inc
-12.8 %
Top 5 Losers ($)$
OLMA
olema pharmaceuticals inc
-17.5 M
RPID
rapid micro biosystems inc
-4.6 M
AVIR
atea pharmaceuticals inc
-1.6 M
upstream bio inc
-1.5 M

Bain Capital Life Sciences Investors, LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of Bain Capital Life Sciences Investors, LLC

Bain Capital Life Sciences Investors, LLC has 21 stocks in it's portfolio. About 87.9% of the portfolio is in top 10 stocks. OLMA proved to be the most loss making stock for the portfolio. was the most profitable stock for Bain Capital Life Sciences Investors, LLC last quarter.

$1.68BTotal Value
22.00Positions
14 Aug, 2026Last Reported
Current holdings of Current Stock Holdings of Bain Capital Life Sciences Investors, LLC, last reported on 14 Aug, 2026. Select a row with a linked ticker to view its historical trend.
ExpandHoldingsorted ascending% PortfolioShares Held$ Value% Change
NAMS
Newamsterdam Pharma Company

Newamsterdam Pharma Company

NAMS
Bain Capital Life Sciences Investors, LLC's holding in Newamsterdam Pharma Company over time
7.67%3,806,570
$129.00M
7.67%
decreased 47.9 percentreduced
NAMS
Newamsterdam Pharma Company

Newamsterdam Pharma Company

NAMS
Bain Capital Life Sciences Investors, LLC's holding in Newamsterdam Pharma Company over time
0.13%99,999
$2.14M
0.13%
unchanged 0 percentunchanged
PHVS
Pharvaris N V

Pharvaris N V

PHVS
Bain Capital Life Sciences Investors, LLC's holding in Pharvaris N V over time
5.5%2,675,510
$92.52M
5.5%
unchanged 0 percentunchanged
Common Stock
Kailera Therapeutics Inc

Kailera Therapeutics Inc

Bain Capital Life Sciences Investors, LLC's holding in Kailera Therapeutics Inc over time
29.58%22,583,300
$497.51M
29.58%
new position
Com
Heartflow Inc

Heartflow Inc

Bain Capital Life Sciences Investors, LLC's holding in Heartflow Inc over time
14.74%8,448,160
$247.87M
14.74%
decreased 19.14 percentreduced
Com Shs
Hemab Therapeutics Holdings Inc

Hemab Therapeutics Holdings Inc

Bain Capital Life Sciences Investors, LLC's holding in Hemab Therapeutics Holdings Inc over time
3.6%1,650,000
$60.60M
3.6%
new position
Com
Dianthus Therapeutics Inc

Dianthus Therapeutics Inc

Bain Capital Life Sciences Investors, LLC's holding in Dianthus Therapeutics Inc over time
2.1%362,470
$35.33M
2.1%
unchanged 0 percentunchanged
Com
Kyverna Therapeutics Inc

Kyverna Therapeutics Inc

Bain Capital Life Sciences Investors, LLC's holding in Kyverna Therapeutics Inc over time
1.53%2,885,000
$25.71M
1.53%
decreased 7.23 percentreduced