Atlas Venture Life Science Advisors, LLC.

Institutional filer · behavioral pattern: Other. Summary pending.

AUM · $753M (13F)Positions · 9Turnover · — · Q1Filed · May 14, 2026

CONCENTRATION

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Top 10 holdings

NEW BUYS

No new positions

EXITS

No exits

SECTOR SHIFT

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No prior quarter data

3YR HIT RATE

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Top-5 overlap

§ 01 · TOP HOLDINGS

The book · Q1 2026

FILED MAY 14, 2026

#	Ticker	Name	Shares	$ value	% port	Δ Q1
1	KYMR	Kymera Therapeutics, Inc.	4.58M	$381M	48.3%	−2%
2	DYN	Dyne Therapeutics, Inc.	9.13M	$166M	21.0%	±0%
3	SION	Sionna Therapeutics, Inc.	3.00M	$120M	15.2%	±0%
4	IRON	Disc Medicine, Inc.	1.51M	$97M	12.3%	±0%
5	QTTB	Q32 Bio, Inc.	2.09M	$13M	1.7%	±0%
6	KRRO	Korro Bio, Inc.	1.14M	$13M	1.6%	±0%

§ 02 · SECTOR ALLOCATION

Sector data pending

§ 03 · THE ATLAS SIGNAL

Atlas Venture Life Science Advisors, LLC is a Other fund managing $753 million in assets. The fund runs a focused portfolio of just 9 positions.

§ 04 · FILING HISTORY

2 FILINGS

Q1 2026

Steady book

+0 buys · −0 exits · 0 changed

Q4 2025

Steady book

+0 buys · −0 exits · 0 changed

Q3 2025

Steady book

+0 buys · −0 exits · 0 changed

Q2 2025

Steady book

+0 buys · −0 exits · 0 changed