Atlas Venture Life Science Advisors, LLC Long-Term Concentrated

Name: Atlas Venture Life Science Advisors, LLC Q1 2026 13F Filing | 13F Explorer
Creator: Atlas Venture Life Science Advisors, LLC
Published: 2026-05-14

Location: Cambridge, MA

CIK: 0001917529 · Show all filings

Period: Q1 2026 (← Previous) (Next →)

Filing Date: May 14, 2026

Total Value: $790M (100.0% shares, 0.0% debt)

Holdings (6)

KYMR Kymera Therapeutics, Inc. 48.3%

Value $381M Shares 4,578,008 Est. Cost $58.25 Unrealized +33.2%

DYN Dyne Therapeutics, Inc. 21.0%

Value $166M Shares 9,130,465 Est. Cost $13.88 Unrealized +23.3%

SION Sionna Therapeutics, Inc. 15.2%

Value $120M Shares 2,995,602 Est. Cost $16.34 Unrealized +140.2%

IRON Disc Medicine, Inc. 12.3%

Value $96.8M Shares 1,513,875 Est. Cost $48.39 Unrealized +53.0%

QTTB Q32 Bio, Inc. 1.7%

Value $13.43M Shares 2,092,106 Est. Cost $13.78 Unrealized -71.4%

KRRO Korro Bio, Inc. 1.6%

Value $12.87M Shares 1,137,149 Est. Cost $33.30 Unrealized -67.6%

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
KYMR	Kymera Therapeutics, Inc.	4,578,008	$381M	48.3%	$58.25	+33.2%	Common Stock	501575104
DYN	Dyne Therapeutics, Inc.	9,130,465	$166M	21.0%	$13.88	+23.3%	Common Stock	26818M108
SION	Sionna Therapeutics, Inc.	2,995,602	$120M	15.2%	$16.34	+140.2%	Common Stock	829401108
IRON	Disc Medicine, Inc.	1,513,875	$96.8M	12.3%	$48.39	+53.0%	Common Stock	254604101
QTTB	Q32 Bio, Inc.	2,092,106	$13.43M	1.7%	$13.78	-71.4%	Common Stock	746964105
KRRO	Korro Bio, Inc.	1,137,149	$12.87M	1.6%	$33.30	-67.6%	Common Stock	500946108