Filed: 2/13/2026ACC: 0001104659-26-014463
📋 What this filing means
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC filed this quarterly 13F‑HR report disclosing 8 equity positions with a total reported market value of $865.15M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
8
Positions
$865.15M
Total AUM (reported)
28.77M
Total Shares
Allocation by class
COMMON STOCK$865.15M100.0%
Portfolio Concentration
Top 3$664.42M76.8%
4–10$200.74M23.2%
Top 3 weight
76.8%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 28.77M
Sole
Full voting authority
28.77M
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)
Sole8
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings8
Rows:
Kymera Therapeutics, Inc.
SOLEShares4.66M
TypeSH
Market value$362.58M
41.91%
Sole
4.66M
Shared
0.00
None
0.00
Dyne Therapeutics, Inc.
SOLEShares9.13M
TypeSH
Market value$178.59M
20.64%
Sole
9.13M
Shared
0.00
None
0.00
Sionna Therapeutics, Inc.
SOLEShares3M
TypeSH
Market value$123.24M
14.24%
Sole
3M
Shared
0.00
None
0.00
Disc Medicine, Inc.
SOLEShares1.51M
TypeSH
Market value$120.22M
13.90%
Sole
1.51M
Shared
0.00
None
0.00
Day One Biopharmaceuticals, Inc.
SOLEShares6.41M
TypeSH
Market value$59.77M
6.91%
Sole
6.41M
Shared
0.00
None
0.00
Korro Bio, Inc.
SOLEShares1.14M
TypeSH
Market value$9.11M
1.05%
Sole
1.14M
Shared
0.00
None
0.00
Q32 Bio, Inc.
SOLEShares2.09M
TypeSH
Market value$6.95M
0.80%
Sole
2.09M
Shared
0.00
None
0.00
Generation Bio, Co.
SOLEShares827.95K
TypeSH
Market value$4.70M
0.54%
Sole
827.95K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
Kymera Therapeutics, Inc.SOLE | Common Stock | 4.66M | SH | $362.58M 41.91% | 4.66M | 0.00 | 0.00 |
Dyne Therapeutics, Inc.SOLE | Common Stock | 9.13M | SH | $178.59M 20.64% | 9.13M | 0.00 | 0.00 |
Sionna Therapeutics, Inc.SOLE | Common Stock | 3M | SH | $123.24M 14.24% | 3M | 0.00 | 0.00 |
Disc Medicine, Inc.SOLE | Common Stock | 1.51M | SH | $120.22M 13.90% | 1.51M | 0.00 | 0.00 |
Day One Biopharmaceuticals, Inc.SOLE | Common Stock | 6.41M | SH | $59.77M 6.91% | 6.41M | 0.00 | 0.00 |
Korro Bio, Inc.SOLE | Common Stock | 1.14M | SH | $9.11M 1.05% | 1.14M | 0.00 | 0.00 |
Q32 Bio, Inc.SOLE | Common Stock | 2.09M | SH | $6.95M 0.80% | 2.09M | 0.00 | 0.00 |
Generation Bio, Co.SOLE | Common Stock | 827.95K | SH | $4.70M 0.54% | 827.95K | 0.00 | 0.00 |