Atlas Venture Opportunity Fund I, L.P. (CIK 0001759241)

Latest company ownership

GBIO - Generation Bio Co.
Role: 10% Owner
Shares held
8,278,876
Last filed at
Sep 29, 2021
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q2 2025Q4
IMA - ImageneBio, Inc.
Role: 10% Owner
Shares held
1,241,935
Last filed at
Dec 14, 2021
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q1 2025Q4
Shares held
847,388
Last filed at
Mar 5, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2022Q4 2025Q4
Shares held
828,830
Last filed at
Mar 13, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2022Q4 2025Q4
Shares held
793,116
Last filed at
Jul 6, 2022
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q2 2025Q4
Shares held
734,546
Last filed at
Feb 9, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q4 2025Q4
Shares held
404,079
Last filed at
Feb 10, 2020
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q2 2025Q4
IRON - Disc Medicine, Inc.
Role: 10% Owner
Shares held
198,326
Last filed at
Jan 25, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2023Q3 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 11, 2024 Mar 13, 2024 Kymera Therapeutics, Inc. 10% Owner Sell 25.0 -353,357 -6.03% ✓ $14.9M
Mar 1, 2024 Mar 5, 2024 Dyne Therapeutics, Inc. 10% Owner Sell 40.0 -46,534 -1.98% ✓ $1.4M
Feb 26, 2024 Feb 28, 2024 Dyne Therapeutics, Inc. 10% Owner Sell 30.0 -807,838 -3.86% ✓ $19.6M
Feb 21, 2024 Feb 23, 2024 Dyne Therapeutics, Inc. 10% Owner Sell 25.0 -500,789 -5.35% ✓ $11.3M
Feb 8, 2024 Feb 9, 2024 Xilio Therapeutics, Inc. 10% Owner Sell 52.5 -1,000 -0.04% ✗ $640
Jan 23, 2024 Jan 25, 2024 Disc Medicine, Inc. 10% Owner Sell 15.0 -150,000 -6.11% ✗ $10.1M
Jan 11, 2024 Jan 16, 2024 Xilio Therapeutics, Inc. 10% Owner Sell 52.5 -4,235 -0.15% ✗ $3.6K
Jan 10, 2024 Jan 12, 2024 Disc Medicine, Inc. 10% Owner Sell 17.5 -50,000 -2.19% ✗ $3.2M
Dec 12, 2023 Dec 14, 2023 Disc Medicine, Inc. 10% Owner Sell 15.0 -190,163 -7.68% ✗ $11.7M
Aug 14, 2023 Aug 16, 2023 Disc Medicine, Inc. 10% Owner Sell 15.0 -359,000 -11.25% ✗ $18.8M
Jan 11, 2023 Jan 13, 2023 Kymera Therapeutics, Inc. 10% Owner Sell 36.3 -126,474 -2.11% ✓ $3.8M
Dec 14, 2022 Dec 16, 2022 Kymera Therapeutics, Inc. 10% Owner Sell 25.0 -382,244 -6.00% ✓ $12M
Dec 12, 2022 Dec 14, 2022 Dyne Therapeutics, Inc. 10% Owner Buy 100.0 +934,581 10.46% ✗ $10M
Nov 2, 2022 Nov 4, 2022 Kymera Therapeutics, Inc. 10% Owner Sell 31.3 -220,016 -3.34% ✓ $6.6M
Oct 28, 2022 Nov 1, 2022 Kymera Therapeutics, Inc. 10% Owner Sell 31.3 -288,702 -4.20% ✓ $8.7M
Jun 17, 2022 Jun 22, 2022 Day One Biopharmaceuticals, Inc. 10% Owner Buy 97.5 +766,667 9.33% ✗ $11.5M
Mar 30, 2021 Dec 14, 2021 ImageneBio, Inc. 10% Owner Buy 92.5 +98,722 4.89% ✗ $1.6M
Oct 26, 2021 Oct 26, 2021 Xilio Therapeutics, Inc. 10% Owner Buy 100.0 +187,500 34.19% ✗ $3M
Sep 27, 2021 Sep 29, 2021 Generation Bio Co. 10% Owner Sell 5.0 -81,088 -99.26% ✓ $2.1M
Sep 22, 2021 Sep 24, 2021 Generation Bio Co. 10% Owner Sell 5.0 -134,998 -62.30% ✓ $3.5M
Jun 24, 2021 Jun 28, 2021 Generation Bio Co. 10% Owner Sell 7.5 -31,008 -98.08% ✓ $801.6K
Jun 1, 2021 Jun 2, 2021 Day One Biopharmaceuticals, Inc. 10% Owner Buy 100.0 +500,000 100.00% ✗ $8M
Jun 24, 2019 Jun 25, 2019 Akero Therapeutics, Inc. 10% Owner Buy 100.0 +270,000 114.85% ✗ $4.3M