Atlas Venture Life Science Advisors, LLC — 13F Holdings

2026 Q1  ·  8 Positions

2026 Q1 Portfolio Activity

In 2026 Q1, Atlas Venture Life Science Advisors, LLC maintained a portfolio of 8 distinct positions. Conversely, Atlas Venture Life Science Advisors, LLC completely exited their position in Day One Biopharmaceuticals, In.
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 $790M
Fund Overview SEC EDGAR
PCA Score Concentration Risk
Risk ENB
To Excel To CSV
Total Positions
8
Quarter
2026 Q1
Top Holding
KYMR (48.3%)
Top 10 Concentration
100.0%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-8 of 8
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 48.26% 41.91% #1
Prev: #1
6.5
—
-81,866 -1.8%
P
S
4,578,008 $381,302,286 2022 Q1 13F Filing 2026-03-31 2026-05-14
DYN
Dyne Therapeuti...
Healthcare 20.95% 20.64% #2
Prev: #2
6.5
—
no change no change
P
S
9,130,465 $165,535,330 2022 Q1 13F Filing 2026-03-31 2026-05-14
SION
Sionna Therapeu...
Healthcare 15.20% 14.24% #3
Prev: #3
6.0
—
no change no change
P
S
2,995,602 $120,093,684 2025 Q1 13F Filing 2026-03-31 2026-05-14
IRON
Disc Medicine, ...
Healthcare 12.25% 13.90% #4
Prev: #4
5.5
—
no change no change
P
S
1,513,875 $96,797,168 2022 Q4 13F Filing 2026-03-31 2026-05-14
QTTB
Q32 Bio, Inc.
Healthcare 1.70% 0.80% #5 2
Prev: #7
2.2
—
no change no change
P
S
2,092,106 $13,431,321 2024 Q1 13F Filing 2026-03-31 2026-05-14
KRRO
Korro Bio, Inc.
Healthcare 1.63% 1.05% #6
Prev: #6
1.7
—
no change no change
P
S
1,137,149 $12,872,527 2023 Q4 13F Filing 2026-03-31 2026-05-14
N/A
Generation Bio,...
Unknown 0.00% 0.54%
Sold All 😨
(Was: #8)
 0.0
—
-827,946 -100.0%
CLOSED
 — $— — 13F Filing 2026-03-31 2026-05-14
DAWN
Day One Biophar...
Healthcare 0.00% 6.91%
Sold All 😨
(Was: #5)
 0.0
—
-6,412,560 -100.0%
CLOSED
 — $— 2022 Q1 13F Filing 2026-03-31 2026-05-14
Showing 1-8 of 8 holdings

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