Filed: 11/13/2025ACC: 0001104659-25-111321
📋 What this filing means
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC filed this quarterly 13F‑HR report disclosing 9 equity positions with a total reported market value of $752.64M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
9
Positions
$752.64M
Total AUM (reported)
30.65M
Total Shares
Allocation by class
COMMON STOCK$752.64M100.0%
Portfolio Concentration
Top 3$534.22M71.0%
4–10$218.41M29.0%
Top 3 weight
71.0%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 30.65M
Sole
Full voting authority
30.65M
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)
Sole9
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings9
Rows:
Kymera Therapeutics, Inc.
SOLEShares4.90M
TypeSH
Market value$277.14M
36.82%
Sole
4.90M
Shared
0.00
None
0.00
Disc Medicine, Inc.
SOLEShares2.14M
TypeSH
Market value$141.58M
18.81%
Sole
2.14M
Shared
0.00
None
0.00
Dyne Therapeutics, Inc.
SOLEShares9.13M
TypeSH
Market value$115.50M
15.35%
Sole
9.13M
Shared
0.00
None
0.00
Sionna Therapeutics, Inc.
SOLEShares3.62M
TypeSH
Market value$106.33M
14.13%
Sole
3.62M
Shared
0.00
None
0.00
Korro Bio, Inc.
SOLEShares1.14M
TypeSH
Market value$54.46M
7.24%
Sole
1.14M
Shared
0.00
None
0.00
Day One Biopharmaceuticals, Inc.
SOLEShares6.43M
TypeSH
Market value$45.33M
6.02%
Sole
6.43M
Shared
0.00
None
0.00
Generation Bio, Co.
SOLEShares827.95K
TypeSH
Market value$5.07M
0.67%
Sole
827.95K
Shared
0.00
None
0.00
Q32 Bio, Inc.
SOLEShares2.09M
TypeSH
Market value$4.14M
0.55%
Sole
2.09M
Shared
0.00
None
0.00
ImageneBio, Inc.
SOLEShares377.81K
TypeSH
Market value$3.08M
0.41%
Sole
377.81K
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 | $277.14M 36.82% | 4.90M | 0.00 | 0.00 |
Disc Medicine, Inc.SOLE | Common Stock | 2.14M | SH | $141.58M 18.81% | 2.14M | 0.00 | 0.00 |
Dyne Therapeutics, Inc.SOLE | Common Stock | 9.13M | SH | $115.50M 15.35% | 9.13M | 0.00 | 0.00 |
Sionna Therapeutics, Inc.SOLE | Common Stock | 3.62M | SH | $106.33M 14.13% | 3.62M | 0.00 | 0.00 |
Korro Bio, Inc.SOLE | Common Stock | 1.14M | SH | $54.46M 7.24% | 1.14M | 0.00 | 0.00 |
Day One Biopharmaceuticals, Inc.SOLE | Common Stock | 6.43M | SH | $45.33M 6.02% | 6.43M | 0.00 | 0.00 |
Generation Bio, Co.SOLE | Common Stock | 827.95K | SH | $5.07M 0.67% | 827.95K | 0.00 | 0.00 |
Q32 Bio, Inc.SOLE | Common Stock | 2.09M | SH | $4.14M 0.55% | 2.09M | 0.00 | 0.00 |
ImageneBio, Inc.SOLE | Common Stock | 377.81K | SH | $3.08M 0.41% | 377.81K | 0.00 | 0.00 |