Atlas Venture Life Science Advisors, LLC

CIK: 0001917529SEC EDGAR →

Portfolio Value

$865.2M

Holdings

8

As of

Q4 2025

New Positions

1

Closed Positions

2

Top 10 Holdings

RankStockSharesValue% of Portfolio
1

Kymera Therapeutics, Inc.

4,659,874$362.6M
41.91%
2

Dyne Therapeutics, Inc.

9,130,465$178.6M
20.64%
3

Sionna Therapeutics, Inc.

2,995,602$123.2M
14.24%
4

Disc Medicine, Inc.

1,513,875$120.2M
13.90%
5

Day One Biopharmaceuticals, Inc.

6,412,560$59.8M
6.91%
6

Korro Bio, Inc.

1,137,149$9.1M
1.05%
7

Q32 Bio, Inc.

2,092,106$6.9M
0.80%
8

Generation Bio, Co.

827,946$4.7M
0.54%

Quarterly Changes

Top Buys

GBIONEW
$4.7M

Top Sells

KYMR↓ Decreased
$85.4M
IRON↓ Decreased
$21.4M
SION↓ Decreased
$16.9M
DAWN↓ Decreased
$14.4M
GBIOGBXCLOSED
$5.1M

New Positions (1)

$4.7M · 828K shares

Closed Positions (2)

$5.1M · 828K shares
$3.1M · 378K shares

Sector Breakdown

Sector# HoldingsValue%
Healthcare8$865.1M100.0%