Atlas Venture Life Science Advisors, LLC — 13F Holdings

2026 Q2  ·  7 Positions

2026 Q2 Portfolio Activity

In 2026 Q2, Atlas Venture Life Science Advisors, LLC maintained a portfolio of 7 distinct positions. The most significant new addition was Kailera Therapeutics, Inc., now representing 12.93% of the total fund value. They heavily accumulated shares in Q32 Bio, Inc., increasing the position by 29.9%. The fund also reduced its exposure to Kymera Therapeutics, Inc. by 37.8%.
Position History hover any row below to update
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Atlas Venture Life Science Advisors, LLC New York, NY Alternative Asset Manager AUM $881M
Fund Overview SEC EDGAR
PCA Score Concentration Risk
Risk ENB
To Excel To CSV
Total Positions
7
Quarter
2026 Q2
Top Holding
KYMR (37.1%)
Top 10 Concentration
100.0%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-7 of 7
Stock History Sector / Type Port % Prev % Rank / Prev Conviction
Freshness
Change % Change Influence Shares Mkt Value Avg Cost Price Held 1st Owned Source Source Date Date Reported
KYMR
Kymera Therapeu...
Healthcare 37.05% 48.26% #1
Prev: #1
6.0
—
-1,730,467 -37.8%
P
S
2,847,541 $326,527,526
$42.32 +169.7%
$114.67 -0.5%
2022 Q1 13F Filing 2026-06-30 2026-08-13
DYN
Dyne Therapeuti...
Healthcare 17.14% 20.95% #2
Prev: #2
5.5
—
-2,330,366 -25.5%
P
S
6,800,099 $151,030,199 2022 Q1 13F Filing 2026-06-30 2026-08-13
SION
Sionna Therapeu...
Healthcare 14.95% 15.20% #3
Prev: #3
6.0
—
no change no change
P
S
2,995,602 $131,776,532 2025 Q1 13F Filing 2026-06-30 2026-08-13
N/A
Kailera Therape...
Unknown 12.93% — #4
Prev: #—
8.0
—
5,171,282 —
NEW
 5,171,282 $113,923,342 — 13F Filing 2026-06-30 2026-08-13
IRON
Disc Medicine, ...
Healthcare 12.56% 12.25% #5 1
Prev: #4
5.5
—
no change no change
P
S
1,513,875 $110,724,818 2022 Q4 13F Filing 2026-06-30 2026-08-13
QTTB
Q32 Bio, Inc.
Healthcare 3.93% 1.70% #6 1
Prev: #5
4.1
—
625,000 29.9%
P
S
2,717,106 $34,615,930 2024 Q1 13F Filing 2026-06-30 2026-08-13
KRRO
Korro Bio, Inc.
Healthcare 1.44% 1.63% #7 1
Prev: #6
1.1
—
-174,265 -15.3%
P
S
962,884 $12,690,811 2023 Q4 13F Filing 2026-06-30 2026-08-13
Showing 1-7 of 7 holdings

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