Filed: 8/12/2025ACC: 0001104659-25-076898
📋 What this filing means
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC filed this quarterly 13F‑HR report disclosing 11 equity positions with a total reported market value of $662.35M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
11
Positions
$662.35M
Total AUM (reported)
59.30M
Total Shares
Allocation by class
COMMON STOCK$662.35M100.0%
Portfolio Concentration
Top 3$426.88M64.4%
4–10$232.82M35.2%
11–25$2.65M0.4%
Top 3 weight
64.4%
Top 10 weight
99.6%
Voting Authority Distribution
Total shares with voting rights: 59.30M
Sole
Full voting authority
59.30M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole11
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings11
Rows:
Kymera Therapeutics, Inc.
SOLEShares4.90M
TypeSH
Market value$213.68M
32.26%
Sole
4.90M
Shared
0.00
None
0.00
Disc Medicine, Inc.
SOLEShares2.38M
TypeSH
Market value$126.28M
19.07%
Sole
2.38M
Shared
0.00
None
0.00
Dyne Therapeutics, Inc.
SOLEShares9.13M
TypeSH
Market value$86.92M
13.12%
Sole
9.13M
Shared
0.00
None
0.00
Sionna Therapeutics, Inc.
SOLEShares3.69M
TypeSH
Market value$64.09M
9.68%
Sole
3.69M
Shared
0.00
None
0.00
Third Harmonic Bio, Inc.
SOLEShares10.40M
TypeSH
Market value$56.48M
8.53%
Sole
10.40M
Shared
0.00
None
0.00
Vigil Neuroscience, Inc.
SOLEShares5.84M
TypeSH
Market value$46.40M
7.01%
Sole
5.84M
Shared
0.00
None
0.00
Day One Biopharmaceuticals, Inc.
SOLEShares6.43M
TypeSH
Market value$41.80M
6.31%
Sole
6.43M
Shared
0.00
None
0.00
Korro Bio, Inc.
SOLEShares1.14M
TypeSH
Market value$14.20M
2.14%
Sole
1.14M
Shared
0.00
None
0.00
Ikena Oncology, Inc.
SOLEShares5.02M
TypeSH
Market value$6.72M
1.02%
Sole
5.02M
Shared
0.00
None
0.00
Q32 Bio, Inc.
SOLEShares2.09M
TypeSH
Market value$3.12M
0.47%
Sole
2.09M
Shared
0.00
None
0.00
Generation Bio, Co.
SOLEShares8.28M
TypeSH
Market value$2.65M
0.40%
Sole
8.28M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
Kymera Therapeutics, Inc.SOLE | Common Stock | 4.90M | SH | $213.68M 32.26% | 4.90M | 0.00 | 0.00 |
Disc Medicine, Inc.SOLE | Common Stock | 2.38M | SH | $126.28M 19.07% | 2.38M | 0.00 | 0.00 |
Dyne Therapeutics, Inc.SOLE | Common Stock | 9.13M | SH | $86.92M 13.12% | 9.13M | 0.00 | 0.00 |
Sionna Therapeutics, Inc.SOLE | Common Stock | 3.69M | SH | $64.09M 9.68% | 3.69M | 0.00 | 0.00 |
Third Harmonic Bio, Inc.SOLE | Common Stock | 10.40M | SH | $56.48M 8.53% | 10.40M | 0.00 | 0.00 |
Vigil Neuroscience, Inc.SOLE | Common Stock | 5.84M | SH | $46.40M 7.01% | 5.84M | 0.00 | 0.00 |
Day One Biopharmaceuticals, Inc.SOLE | Common Stock | 6.43M | SH | $41.80M 6.31% | 6.43M | 0.00 | 0.00 |
Korro Bio, Inc.SOLE | Common Stock | 1.14M | SH | $14.20M 2.14% | 1.14M | 0.00 | 0.00 |
Ikena Oncology, Inc.SOLE | Common Stock | 5.02M | SH | $6.72M 1.02% | 5.02M | 0.00 | 0.00 |
Q32 Bio, Inc.SOLE | Common Stock | 2.09M | SH | $3.12M 0.47% | 2.09M | 0.00 | 0.00 |
Generation Bio, Co.SOLE | Common Stock | 8.28M | SH | $2.65M 0.40% | 8.28M | 0.00 | 0.00 |