Atlas Venture Associates X, LLC (CIK 0001742765)

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
Shares held
4,756,478
Last filed at
Jul 29, 2019
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q3 2025Q4
Shares held
828,830
Last filed at
Mar 13, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q1 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
Shares held
0
Last filed at
Mar 22, 2019
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q1 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
Jan 23, 2024 Jan 25, 2024 Disc Medicine, Inc. 10% Owner Sell 15.0 -150,000 -6.11% ✗ $10.1M
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
Sep 14, 2023 Sep 18, 2023 Disc Medicine, Inc. 10% Owner Sell 15.0 -357,449 -18.32% ✗ $19M
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
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
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
Aug 11, 2021 Aug 12, 2021 Kymera Therapeutics, Inc. 10% Owner Sell 15.0 -242,133 -4.03% ✗ $14.8M
Jun 24, 2021 Jun 28, 2021 Generation Bio Co. 10% Owner Sell 7.5 -31,008 -98.08% ✓ $801.6K
Jun 21, 2021 Jun 23, 2021 Generation Bio Co. 10% Owner Sell 5.0 -185,078 -85.41% ✓ $4.6M
Apr 12, 2021 Apr 14, 2021 Generation Bio Co. 10% Owner Sell 40.0 -140,682 -1.52% ✓ $3.6M
Apr 7, 2021 Apr 9, 2021 Generation Bio Co. 10% Owner Sell 40.0 -127,095 -1.35% ✓ $3.6M
Mar 12, 2021 Mar 16, 2021 Kymera Therapeutics, Inc. 10% Owner Sell 15.0 -229,350 -3.22% ✗ $13M
Jul 19, 2019 Jul 23, 2019 Tectonic Therapeutic, Inc. 10% Owner Buy 100.0 +810,811 17.05% ✗ $15M
Mar 20, 2019 Mar 22, 2019 Dianthus Therapeutics, Inc. /DE/ 10% Owner Sell 20.0 -726,500 -15.00% ✗ $254.4K