Filed: 8/13/2026ACC: 0001104659-26-095933
📋 What this filing means
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC filed this quarterly 13F‑HR report disclosing 7 equity positions with a total reported market value of $881.29M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
7
Positions
$881.29M
Total AUM (reported)
23.01M
Total Shares
Allocation by class
COMMON STOCK$881.29M100.0%
Portfolio Concentration
Top 3$609.33M69.1%
4–10$271.95M30.9%
Top 3 weight
69.1%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 23.01M
Sole
Full voting authority
23.01M
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)
Sole7
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings7
Rows:
Kymera Therapeutics, Inc.
SOLEShares2.85M
TypeSH
Market value$326.53M
37.05%
Sole
2.85M
Shared
0.00
None
0.00
Dyne Therapeutics, Inc.
SOLEShares6.80M
TypeSH
Market value$151.03M
17.14%
Sole
6.80M
Shared
0.00
None
0.00
Sionna Therapeutics, Inc.
SOLEShares3M
TypeSH
Market value$131.78M
14.95%
Sole
3M
Shared
0.00
None
0.00
Kailera Therapeutics, Inc.
SOLEShares5.17M
TypeSH
Market value$113.92M
12.93%
Sole
5.17M
Shared
0.00
None
0.00
Disc Medicine, Inc.
SOLEShares1.51M
TypeSH
Market value$110.72M
12.56%
Sole
1.51M
Shared
0.00
None
0.00
Q32 Bio, Inc.
SOLEShares2.72M
TypeSH
Market value$34.62M
3.93%
Sole
2.72M
Shared
0.00
None
0.00
Korro Bio, Inc.
SOLEShares962.88K
TypeSH
Market value$12.69M
1.44%
Sole
962.88K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
Kymera Therapeutics, Inc.SOLE | Common Stock | 2.85M | SH | $326.53M 37.05% | 2.85M | 0.00 | 0.00 |
Dyne Therapeutics, Inc.SOLE | Common Stock | 6.80M | SH | $151.03M 17.14% | 6.80M | 0.00 | 0.00 |
Sionna Therapeutics, Inc.SOLE | Common Stock | 3M | SH | $131.78M 14.95% | 3M | 0.00 | 0.00 |
Kailera Therapeutics, Inc.SOLE | Common Stock | 5.17M | SH | $113.92M 12.93% | 5.17M | 0.00 | 0.00 |
Disc Medicine, Inc.SOLE | Common Stock | 1.51M | SH | $110.72M 12.56% | 1.51M | 0.00 | 0.00 |
Q32 Bio, Inc.SOLE | Common Stock | 2.72M | SH | $34.62M 3.93% | 2.72M | 0.00 | 0.00 |
Korro Bio, Inc.SOLE | Common Stock | 962.88K | SH | $12.69M 1.44% | 962.88K | 0.00 | 0.00 |