Filed: 5/14/2025ACC: 0001104659-25-048527
📋 What this filing means
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC filed this quarterly 13F‑HR report disclosing 13 equity positions with a total reported market value of $521.76M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
13
Positions
$521.76M
Total AUM (reported)
61.41M
Total Shares
Allocation by class
COMMON STOCK$521.76M100.0%
Portfolio Concentration
Top 3$347.89M66.7%
4–10$166.85M32.0%
11–25$7.02M1.3%
Top 3 weight
66.7%
Top 10 weight
98.7%
Voting Authority Distribution
Total shares with voting rights: 61.41M
Sole
Full voting authority
61.41M
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)
Sole13
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings13
Rows:
Kymera Therapeutics, Inc.
SOLEShares4.90M
TypeSH
Market value$134.02M
25.69%
Sole
4.90M
Shared
0.00
None
0.00
Disc Medicine, Inc.
SOLEShares2.38M
TypeSH
Market value$118.36M
22.69%
Sole
2.38M
Shared
0.00
None
0.00
Dyne Therapeutics, Inc.
SOLEShares9.13M
TypeSH
Market value$95.50M
18.30%
Sole
9.13M
Shared
0.00
None
0.00
Day One Biopharmaceuticals, Inc.
SOLEShares6.43M
TypeSH
Market value$50.99M
9.77%
Sole
6.43M
Shared
0.00
None
0.00
Sionna Therapeutics, Inc.
SOLEShares3.69M
TypeSH
Market value$38.64M
7.41%
Sole
3.69M
Shared
0.00
None
0.00
Third Harmonic Bio, Inc.
SOLEShares10.40M
TypeSH
Market value$36.10M
6.92%
Sole
10.40M
Shared
0.00
None
0.00
Korro Bio, Inc.
SOLEShares1.14M
TypeSH
Market value$19.80M
3.79%
Sole
1.14M
Shared
0.00
None
0.00
Vigil Neuroscience, Inc.
SOLEShares5.84M
TypeSH
Market value$10.39M
1.99%
Sole
5.84M
Shared
0.00
None
0.00
Ikena Oncology, Inc.
SOLEShares5.02M
TypeSH
Market value$6.42M
1.23%
Sole
5.02M
Shared
0.00
None
0.00
Aerovate Therapeutics, Inc.
SOLEShares1.80M
TypeSH
Market value$4.52M
0.87%
Sole
1.80M
Shared
0.00
None
0.00
Q32 Bio, Inc.
SOLEShares2.09M
TypeSH
Market value$3.45M
0.66%
Sole
2.09M
Shared
0.00
None
0.00
Generation Bio, Co.
SOLEShares8.28M
TypeSH
Market value$3.35M
0.64%
Sole
8.28M
Shared
0.00
None
0.00
Spero Therapeutics, Inc.
SOLEShares305.25K
TypeSH
Market value$219.8K
0.04%
Sole
305.25K
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 | $134.02M 25.69% | 4.90M | 0.00 | 0.00 |
Disc Medicine, Inc.SOLE | Common Stock | 2.38M | SH | $118.36M 22.69% | 2.38M | 0.00 | 0.00 |
Dyne Therapeutics, Inc.SOLE | Common Stock | 9.13M | SH | $95.50M 18.30% | 9.13M | 0.00 | 0.00 |
Day One Biopharmaceuticals, Inc.SOLE | Common Stock | 6.43M | SH | $50.99M 9.77% | 6.43M | 0.00 | 0.00 |
Sionna Therapeutics, Inc.SOLE | Common Stock | 3.69M | SH | $38.64M 7.41% | 3.69M | 0.00 | 0.00 |
Third Harmonic Bio, Inc.SOLE | Common Stock | 10.40M | SH | $36.10M 6.92% | 10.40M | 0.00 | 0.00 |
Korro Bio, Inc.SOLE | Common Stock | 1.14M | SH | $19.80M 3.79% | 1.14M | 0.00 | 0.00 |
Vigil Neuroscience, Inc.SOLE | Common Stock | 5.84M | SH | $10.39M 1.99% | 5.84M | 0.00 | 0.00 |
Ikena Oncology, Inc.SOLE | Common Stock | 5.02M | SH | $6.42M 1.23% | 5.02M | 0.00 | 0.00 |
Aerovate Therapeutics, Inc.SOLE | Common Stock | 1.80M | SH | $4.52M 0.87% | 1.80M | 0.00 | 0.00 |
Q32 Bio, Inc.SOLE | Common Stock | 2.09M | SH | $3.45M 0.66% | 2.09M | 0.00 | 0.00 |
Generation Bio, Co.SOLE | Common Stock | 8.28M | SH | $3.35M 0.64% | 8.28M | 0.00 | 0.00 |
Spero Therapeutics, Inc.SOLE | Common Stock | 305.25K | SH | $219.8K 0.04% | 305.25K | 0.00 | 0.00 |