Atlas Venture Life Science Advisors, LLC Long-Term Concentrated

CIK: 0001917529 · Show all filings

Period: Q2 2025 (← Previous) (Next →)

Filing Date: Aug 12, 2025

Total Value ($000): $662,355 (100.0% shares, 0.0% debt)

Holdings (11)

KYMR Kymera Therapeutics, Inc. 32.3%

Value ($000) $213,682 Shares 4,896,462 Est. Cost $58.25 Unrealized -40.9%

IRON Disc Medicine, Inc. 19.1%

Value ($000) $126,281 Shares 2,384,456 Est. Cost $48.39 Unrealized -2.9%

DYN Dyne Therapeutics, Inc. 13.1%

Value ($000) $86,922 Shares 9,130,465 Est. Cost $13.88 Unrealized -20.7%

SION Sionna Therapeutics, Inc. 9.7%

Value ($000) $64,091 Shares 3,694,020 Est. Cost $16.34 Unrealized -19.8%

— Third Harmonic Bio, Inc. 8.5%

Value ($000) $56,484 Shares 10,402,286 Est. Cost $18.97 Unrealized —

— Vigil Neuroscience, Inc. 7.0%

Value ($000) $46,403 Shares 5,836,874 Est. Cost $7.03 Unrealized —

DAWN Day One Biopharmaceuticals, Inc. 6.3%

Value ($000) $41,797 Shares 6,430,257 Est. Cost $19.68 Unrealized -65.0%

KRRO Korro Bio, Inc. 2.1%

Value ($000) $14,203 Shares 1,137,149 Est. Cost $33.30 Unrealized -56.8%

— Ikena Oncology, Inc. 1.0%

Value ($000) $6,724 Shares 5,018,178 Est. Cost $12.54 Unrealized —

QTTB Q32 Bio, Inc. 0.5%

Value ($000) $3,117 Shares 2,092,106 Est. Cost $13.78 Unrealized -87.6%

— Generation Bio, Co. 0.4%

Value ($000) $2,650 Shares 8,279,484 Est. Cost $7.08 Unrealized —

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
KYMR	Kymera Therapeutics, Inc.	4,896,462	$213,682	32.3%	$58.25	-40.9%	Common Stock	501575104
IRON	Disc Medicine, Inc.	2,384,456	$126,281	19.1%	$48.39	-2.9%	Common Stock	254604101
DYN	Dyne Therapeutics, Inc.	9,130,465	$86,922	13.1%	$13.88	-20.7%	Common Stock	26818M108
SION	Sionna Therapeutics, Inc.	3,694,020	$64,091	9.7%	$16.34	-19.8%	Common Stock	829401108
—	Third Harmonic Bio, Inc.	10,402,286	$56,484	8.5%	$18.97	—	Common Stock	88427A107
—	Vigil Neuroscience, Inc.	5,836,874	$46,403	7.0%	$7.03	—	Common Stock	92673K108
DAWN	Day One Biopharmaceuticals, Inc.	6,430,257	$41,797	6.3%	$19.68	-65.0%	Common Stock	23954D109
KRRO	Korro Bio, Inc.	1,137,149	$14,203	2.1%	$33.30	-56.8%	Common Stock	500946108
—	Ikena Oncology, Inc.	5,018,178	$6,724	1.0%	$12.54	—	Common Stock	45175G108
QTTB	Q32 Bio, Inc.	2,092,106	$3,117	0.5%	$13.78	-87.6%	Common Stock	746964105
—	Generation Bio, Co.	8,279,484	$2,650	0.4%	$7.08	—	Common Stock	37148K100