Atlas Venture Opportunity Fund I, L.P.

10% owner at Q32 Bio Inc. · on record since Mar 27, 2024
10% owner at Day One Biopharmaceuticals, Inc. · on record since May 26, 2021
10% owner at Akero Therapeutics, Inc. · on record since Jun 25, 2019
See Remarks at IT&E INTERNATIONAL GROUP · on record since Jul 29, 2019
See Remarks at Replimune Group, Inc. · on record since Nov 20, 2019
10% owner at Generation Bio Co. · on record since Jun 18, 2020
10% owner at Kymera Therapeutics, Inc. · on record since Aug 25, 2020
10% owner at DYNEGY INC /IL/ · on record since Sep 23, 2020
See remarks at Dianthus Therapeutics, Inc. /DE/ · on record since Jul 13, 2020
10% owner at INVERNESS MEDICAL INNOVATIONS INC · on record since Mar 25, 2021
10% owner at Disc Medicine, Inc. · on record since Feb 11, 2021
10% owner at Xilio Therapeutics, Inc. · on record since Oct 26, 2021
10% owner at Vigil Neuroscience, Inc. · on record since Jan 11, 2022
10% owner at TF FINANCIAL CORP · on record since Sep 19, 2022

Insider trading activity of Atlas Venture Opportunity Fund I, L.P.

Transactions on record: 27; since Dec 19, 2019

Open-market buys: 2; $10.5M

Open-market sells: 4; $3.8M

Companies traded: 6; last filing Aug 7, 2025

Figures computed from official regulatory filings — .

Companies where Atlas Venture Opportunity Fund I, L.P. has traded

Vigil Neuroscience, Inc.7 tx · $7.5M · Aug 7, 2025
Kymera Therapeutics, Inc.4 tx · $3.8M · Jan 13, 2023
1 tx · Jul 6, 2022
7 tx · $3M · Oct 26, 2021
5 tx · Sep 21, 2021
3 tx · Feb 10, 2020

Track record of Atlas Venture Opportunity Fund I, L.P.

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Atlas Venture Opportunity Fund I, L.P.

Co-insiders of Atlas Venture Opportunity Fund I, L.P.

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
Vigil Neuroscience, Inc.	Aug 7, 2025	Other	-1,027,978	—	—	SEC
Vigil Neuroscience, Inc.	Aug 7, 2025	Other	-4,808,896	—	—	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-6,071	29.96 USD	$181.9K	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-21,683	29.96 USD	$649.6K	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-21,592	30.29 USD	$654K	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-77,128	30.29 USD	$2.3M	SEC
Day One Biopharmaceuticals, Inc.	Jul 6, 2022	Other	-198,280	0.00 USD	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	OtherD (derivative)	-2,850,789	0.00 USD	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	Other	2,831,520	—	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	Buy	535,000	14.00 USD	$7.5M	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	OtherD (derivative)	-7,852,374	0.00 USD	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	Other	1,027,978	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Other	1,372,998	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Other	624,089	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	OtherD (derivative)	-13,043,477	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Buy	187,500	16.00 USD	$3M	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	OtherD (derivative)	-5,928,852	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Other	548,442	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	OtherD (derivative)	-5,210,204	—	—	SEC
Generation Bio Co.	Sep 21, 2021	Other	-100,000	0.00 USD	—	SEC
Generation Bio Co.	Sep 21, 2021	Other	-1,000,000	0.00 USD	—	SEC
Generation Bio Co.	Jun 21, 2021	Other	-100,000	0.00 USD	—	SEC
Generation Bio Co.	Jun 21, 2021	Other	-1,000,000	0.00 USD	—	SEC
Generation Bio Co.	Dec 17, 2020	Other	-1,151,882	0.00 USD	—	SEC
Akero Therapeutics, Inc.	Feb 10, 2020	Other	-50,510	0.00 USD	—	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
Vigil Neuroscience, Inc.	Aug 7, 2025	Other	-1,027,978	—	—	SEC
Vigil Neuroscience, Inc.	Aug 7, 2025	Other	-4,808,896	—	—	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-6,071	29.96 USD	$181.9K	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-21,683	29.96 USD	$649.6K	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-21,592	30.29 USD	$654K	SEC
Kymera Therapeutics, Inc.	Jan 13, 2023	Sell	-77,128	30.29 USD	$2.3M	SEC
Day One Biopharmaceuticals, Inc.	Jul 6, 2022	Other	-198,280	0.00 USD	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	OtherD (derivative)	-2,850,789	0.00 USD	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	Other	2,831,520	—	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	Buy	535,000	14.00 USD	$7.5M	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	OtherD (derivative)	-7,852,374	0.00 USD	—	SEC
Vigil Neuroscience, Inc.	Jan 11, 2022	Other	1,027,978	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Other	1,372,998	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Other	624,089	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	OtherD (derivative)	-13,043,477	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Buy	187,500	16.00 USD	$3M	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	OtherD (derivative)	-5,928,852	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	Other	548,442	—	—	SEC
Xilio Therapeutics, Inc.	Oct 26, 2021	OtherD (derivative)	-5,210,204	—	—	SEC
Generation Bio Co.	Sep 21, 2021	Other	-100,000	0.00 USD	—	SEC
Generation Bio Co.	Sep 21, 2021	Other	-1,000,000	0.00 USD	—	SEC
Generation Bio Co.	Jun 21, 2021	Other	-100,000	0.00 USD	—	SEC
Generation Bio Co.	Jun 21, 2021	Other	-1,000,000	0.00 USD	—	SEC
Generation Bio Co.	Dec 17, 2020	Other	-1,151,882	0.00 USD	—	SEC
Akero Therapeutics, Inc.	Feb 10, 2020	Other	-50,510	0.00 USD	—	SEC