Atlas Venture Life Science Advisors, LLC Long-Term Concentrated

CIK: 0001917529 · Show all filings

Period: Q4 2025 (← Previous)

Filing Date: Feb 13, 2026

Total Value ($000): $865,155 (100.0% shares, 0.0% debt)

Holdings (8)

New Positions (1)

— Generation Bio, Co. 0.5%

Value ($000) $4,703 Shares 827,946 Est. Cost $5.68 Unrealized —

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
—	Generation Bio, Co.	827,946	$4,703	0.5%	$5.68	—	Common Stock	37148K209

Exited Positions (2)

— Generation Bio, Co. 0.6%

Value ($000) $5,067 Shares 827,946 Est. Cost $7.08 Unrealized —

IMA ImageneBio, Inc. 0.4%

Value ($000) $3,079 Shares 377,814 Est. Cost $13.25 Unrealized -44.1%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
—	Generation Bio, Co.	827,946	$5,067	0.6%	$7.08	—	—	37148K100
IMA	ImageneBio, Inc.	377,814	$3,079	0.4%	$13.25	-44.1%	—	45175G207

Decreased Positions (3)

KYMR Kymera Therapeutics, Inc. 41.9%

Value ($000) $362,585 (+30.8%) Shares 4,659,874 (-4.8%) Est. Cost $58.25 Unrealized +15.9%

IRON Disc Medicine, Inc. 13.9%

Value ($000) $120,217 (-15.1%) Shares 1,513,875 (-29.3%) Est. Cost $48.39 Unrealized +74.6%

SION Sionna Therapeutics, Inc. 14.2%

Value ($000) $123,239 (+15.9%) Shares 2,995,602 (-17.1%) Est. Cost $16.34 Unrealized +132.1%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
KYMR	Kymera Therapeutics, Inc.	4,659,874 (-4.8%)	$362,585 (+30.8%)	41.9%	$58.25	+15.9%	Common Stock	501575104
IRON	Disc Medicine, Inc.	1,513,875 (-29.3%)	$120,217 (-15.1%)	13.9%	$48.39	+74.6%	Common Stock	254604101
SION	Sionna Therapeutics, Inc.	2,995,602 (-17.1%)	$123,239 (+15.9%)	14.2%	$16.34	+132.1%	Common Stock	829401108

Unchanged Positions (4)

DYN Dyne Therapeutics, Inc. 20.6%

Value ($000) $178,592 Shares 9,130,465 Est. Cost $13.88 Unrealized +36.5%

KRRO Korro Bio, Inc. 1.1%

Value ($000) $9,109 Shares 1,137,149 Est. Cost $33.30 Unrealized -29.8%

DAWN Day One Biopharmaceuticals, Inc. 6.9%

Value ($000) $59,765 Shares 6,412,560 Est. Cost $19.68 Unrealized -57.5%

QTTB Q32 Bio, Inc. 0.8%

Value ($000) $6,946 Shares 2,092,106 Est. Cost $13.78 Unrealized -79.5%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
DYN	Dyne Therapeutics, Inc.	9,130,465	$178,592	20.6%	$13.88	+36.5%	Common Stock	26818M108
KRRO	Korro Bio, Inc.	1,137,149	$9,109	1.1%	$33.30	-29.8%	Common Stock	500946108
DAWN	Day One Biopharmaceuticals, Inc.	6,412,560	$59,765	6.9%	$19.68	-57.5%	Common Stock	23954D109
QTTB	Q32 Bio, Inc.	2,092,106	$6,946	0.8%	$13.78	-79.5%	Common Stock	746964105