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Latest Atlas Venture Life Science Advisors, LLC Stock Portfolio

$881Million | No. of Holdings #7

About Atlas Venture Life Science Advisors, LLC and 13F Hedge Fund Stock Holdings

On 2026-08-13, the fund reported it's updated stock portfolio. In the 13F Holdings report, Atlas Venture Life Science Advisors, LLC reported an equity portfolio of $881.3 Millions as of 30 Jun, 2026. <br><br> The top stock holdings of Atlas Venture Life Science Advisors, LLC are KYMR, DYN, . The fund has invested 37% of it's portfolio in KYMERA THERAPEUTICS, INC. and 17.1% of portfolio in DYNE THERAPEUTICS, INC. <br><br> They significantly reduced their stock positions in KYMERA THERAPEUTICS, INC. (KYMR), DYNE THERAPEUTICS, INC. (DYN) and KORRO BIO, INC.. Atlas Venture Life Science Advisors, LLC opened new stock positions in KAILERA THERAPEUTICS, INC.. The fund showed a lot of confidence in some stocks as they added substantially to Q32 BIO, INC..
Atlas Venture Life Science Advisors, LLC Equity Portfolio Value
Last Reported on: 13 Aug, 2026
$881Million
  as of Aug 13, 2026

Atlas Venture Life Science Advisors, LLC Annual Return Estimates Vs S&P 500

  • Performance

New Buys

Ticker$ Bought
kailera therapeutics, inc.113,923,000
New stocks bought by Atlas Venture Life Science Advisors, LLC

Additions

Ticker% Inc.
q32 bio, inc.29.87
Additions to existing portfolio by Atlas Venture Life Science Advisors, LLC

Reductions

Ticker% Reduced
kymera therapeutics, inc.-37.8
dyne therapeutics, inc.-25.52
korro bio, inc.-15.32
Atlas Venture Life Science Advisors, LLC reduced stake in above stock

Sold off

None of the stocks were completely sold off by Atlas Venture Life Science Advisors, LLC

Sector Distribution

  • Healthcare
  • Others
Sector%
Healthcare54.2
Others45.8

Market Cap. Distribution

  • MID-CAP
  • UNALLOCATED
Category%
MID-CAP54.2
UNALLOCATED45.8

Stocks belong to which Index?

  • RUSSELL 2000
  • Others
Index%
RUSSELL 200054.2
Others45.8
Top 5 Winners (%)%
q32 bio, inc.
78.3 %
KYMR
kymera therapeutics, inc.
30.6 %
DYN
dyne therapeutics, inc.
19.6 %
korro bio, inc.
15.2 %
disc medicine, inc.
14.4 %
Top 5 Winners ($)$
KYMR
kymera therapeutics, inc.
116.5 M
DYN
dyne therapeutics, inc.
32.5 M
q32 bio, inc.
15.2 M
disc medicine, inc.
13.9 M
sionna therapeutics, inc.
11.7 M
Top 5 Losers (%)%
Top 5 Losers ($)$

Atlas Venture Life Science Advisors, LLC Holdings Map

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

Current Stock Holdings of Atlas Venture Life Science Advisors, LLC

$881.29MTotal Value
7.00Positions
13 Aug, 2026Last Reported
Current holdings of Current Stock Holdings of Atlas Venture Life Science Advisors, LLC, last reported on 13 Aug, 2026. Select a row with a linked ticker to view its historical trend.
ExpandHoldingsorted ascending% PortfolioShares Held$ Value% Change
Common Stock
Sionna Therapeutics, Inc.

Sionna Therapeutics, Inc.

Atlas Venture Life Science Advisors, LLC's holding in Sionna Therapeutics, Inc. over time
14.95%2,995,600
$131.78M
14.95%
unchanged 0 percentunchanged
Common Stock
Kailera Therapeutics, Inc.

Kailera Therapeutics, Inc.

Atlas Venture Life Science Advisors, LLC's holding in Kailera Therapeutics, Inc. over time
12.93%5,171,280
$113.92M
12.93%
new position
Common Stock
Disc Medicine, Inc.

Disc Medicine, Inc.

Atlas Venture Life Science Advisors, LLC's holding in Disc Medicine, Inc. over time
12.56%1,513,880
$110.72M
12.56%
unchanged 0 percentunchanged
Common Stock
Q32 Bio, Inc.

Q32 Bio, Inc.

Atlas Venture Life Science Advisors, LLC's holding in Q32 Bio, Inc. over time
3.93%2,717,110
$34.62M
3.93%
increased 29.87 percentadded
Common Stock
Korro Bio, Inc.

Korro Bio, Inc.

Atlas Venture Life Science Advisors, LLC's holding in Korro Bio, Inc. over time
1.44%962,884
$12.69M
1.44%
decreased 15.32 percentreduced