Blavatnik Len (CIK 0001326628)

Latest company ownership

VRNA - Verona Pharma plc
Role: 10% Owner
Shares held
55,911,648
Last filed at
Aug 17, 2022
Confidence Score
50.0
2025Q4
Confidence Score History
2022Q3 2025Q4
Shares held
25,865,449
Last filed at
Mar 30, 2021
Confidence Score
48.4
2025Q4
Confidence Score History
2021Q1 2025Q4
Shares held
12,929,322
Last filed at
Oct 20, 2023
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q2 2025Q4
IRON - Disc Medicine, Inc.
Role: 10% Owner
Shares held
2,814,379
Last filed at
Oct 24, 2025
Confidence Score
23.8
2025Q4
Confidence Score History
2023Q1 2025Q4
Shares held
1,575,066
Last filed at
Jan 7, 2022
Confidence Score
50.0
2025Q4
Confidence Score History
2020Q2 2025Q4
UPB - Upstream Bio, Inc.
Role: 10% Owner
Shares held
1,172,410
Last filed at
Oct 17, 2024
Confidence Score
50.1
2025Q4
Confidence Score History
2024Q4 2025Q4
Shares held
767,075
Last filed at
Nov 18, 2022
Confidence Score
50.0
2025Q4
Confidence Score History
2017Q1 2025Q4
Shares held
641,025
Last filed at
Aug 16, 2021
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q3 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Oct 22, 2025 Oct 24, 2025 Disc Medicine, Inc. 10% Owner Sell 15.0 -744,047 -20.91% ✗ $59.9M
Jun 4, 2025 Jun 6, 2025 DigitalOcean Holdings, Inc. Other Sell 15.0 -3,496,504 -13.60% ✗ $100M
Oct 15, 2024 Oct 17, 2024 Upstream Bio, Inc. 10% Owner Buy 100.0 +1,175,000 100.00% ✗ $20M
Feb 16, 2024 Feb 21, 2024 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -205,022 -3.08% ✗ $20.1M
Oct 18, 2023 Oct 20, 2023 Day One Biopharmaceuticals, Inc. Other Buy 100.0 +1,475,454 12.88% ✗ $15M
Aug 10, 2023 Aug 14, 2023 LyondellBasell Industries N.V. 10% Owner Sell 30.0 -450,000 -0.53% ✗ $648.5K
Jun 9, 2023 Jun 12, 2023 Day One Biopharmaceuticals, Inc. Other Buy 96.3 +769,230 7.20% ✗ $10M
Feb 15, 2023 Feb 17, 2023 Disc Medicine, Inc. 10% Owner Buy 100.0 +434,783 16.06% ✗ $10M
Dec 1, 2022 Dec 5, 2022 LyondellBasell Industries N.V. 10% Owner Sell 25.0 -1,428,298 -0.98% ✗ $121.3M
Nov 28, 2022 Nov 30, 2022 LyondellBasell Industries N.V. 10% Owner Sell 25.0 -1,402,472 -0.93% ✗ $119.1M
Nov 15, 2022 Nov 18, 2022 LyondellBasell Industries N.V. 10% Owner Sell 52.5 -27 0.00% ✗ $2.3K
Nov 15, 2022 Nov 17, 2022 LyondellBasell Industries N.V. 10% Owner Sell 40.0 -127,439 -0.11% ✗ $11M
Jun 13, 2022 Nov 3, 2022 LyondellBasell Industries N.V. 10% Owner Buy 30.0 -249,600 -0.85% ✗ $311.3K
Aug 15, 2022 Aug 17, 2022 Verona Pharma plc 10% Owner Buy 96.3 +4,800,000 9.39% ✗ $6.3M
Jun 17, 2022 Jun 21, 2022 Day One Biopharmaceuticals, Inc. Other Buy 100.0 +1,200,000 12.65% ✗ $18M
Jan 18, 2022 Jan 20, 2022 Day One Biopharmaceuticals, Inc. Other Buy 87.5 +106,862 1.14% ✗ $1.6M
Jan 6, 2022 Jan 7, 2022 Warner Music Group Corp. Director Sell 15.0 -8,562,500 -100.00% ✗ $348.2M
Dec 8, 2021 Dec 10, 2021 Warner Music Group Corp. Director Sell 15.0 -4,160,745 -100.00% ✗ $171.6M
Sep 24, 2021 Sep 28, 2021 Warner Music Group Corp. Director Sell 15.0 -2,340,000 -100.00% ✗ $102.3M
Sep 8, 2021 Sep 10, 2021 Warner Music Group Corp. Director Sell 15.0 -3,150,272 -100.00% ✗ $118.9M
Aug 12, 2021 Aug 16, 2021 Climb Bio, Inc. Other Buy 100.0 +800,000 19.01% ✗ $10M
Jun 1, 2021 Jun 3, 2021 Day One Biopharmaceuticals, Inc. Other Buy 100.0 +875,000 10.29% ✗ $14M
May 4, 2021 May 6, 2021 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -927,000 -1.36% ✗ $100.2M
Mar 25, 2021 Mar 30, 2021 DigitalOcean Holdings, Inc. Other Buy 97.5 +2,127,659 8.96% ✗ $100M
Mar 1, 2021 Mar 3, 2021 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -975,293 -1.42% ✗ $100.8M
Feb 25, 2021 Mar 1, 2021 LyondellBasell Industries N.V. 10% Owner Sell 45.0 -4,500 -0.01% ✗ $483.1K
Feb 24, 2021 Feb 26, 2021 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -714,500 -1.03% ✗ $76.1M
Feb 23, 2021 Feb 25, 2021 LyondellBasell Industries N.V. 10% Owner Sell 25.0 -478,060 -0.68% ✗ $49.3M
Feb 22, 2021 Feb 24, 2021 LyondellBasell Industries N.V. 10% Owner Sell 32.5 -350,000 -0.50% ✗ $36.2M
Feb 12, 2021 Feb 17, 2021 LyondellBasell Industries N.V. 10% Owner Sell 25.0 -393,780 -0.56% ✗ $37.6M
Feb 11, 2021 Feb 16, 2021 LyondellBasell Industries N.V. 10% Owner Sell 41.3 -55,538 -0.08% ✗ $5.3M
Feb 10, 2021 Feb 12, 2021 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -720,682 -1.01% ✗ $69.1M
Feb 10, 2021 Feb 12, 2021 Warner Music Group Corp. Director Sell 15.0 -4,754,626 -100.00% ✗ $181.9M
Dec 4, 2020 Dec 8, 2020 LyondellBasell Industries N.V. 10% Owner Sell 25.0 -518,691 -0.69% ✗ $45.9M
Dec 1, 2020 Dec 3, 2020 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -1,778,839 -2.30% ✗ $153.2M
Mar 18, 2020 Dec 2, 2020 LyondellBasell Industries N.V. 10% Owner Sell 45.0 -10,804 -0.01% ✗ $935.9K
Jul 7, 2020 Jul 9, 2020 Warner Music Group Corp. Director Sell 15.0 -11,208,881 -100.00% ✗ $280.2M
Jun 5, 2020 Jun 5, 2020 Warner Music Group Corp. Director Sell 15.0 -54,725,875 -100.00% ✗ $1.4B
Aug 29, 2019 Sep 3, 2019 LyondellBasell Industries N.V. 10% Owner Buy 80.0 +764,501 1.00% ✗ $57M
Nov 9, 2018 Nov 13, 2018 LyondellBasell Industries N.V. 10% Owner Buy 95.0 +2,186,973 2.94% ✗ $209.1M
Nov 6, 2018 Nov 8, 2018 LyondellBasell Industries N.V. 10% Owner Buy 90.0 +1,602,455 2.20% ✗ $153.3M
Nov 1, 2018 Nov 5, 2018 LyondellBasell Industries N.V. 10% Owner Buy 90.0 +1,310,572 1.83% ✗ $121M
Mar 9, 2017 Mar 10, 2017 LyondellBasell Industries N.V. 10% Owner Sell 40.0 -139,617 -0.19% ✗ $12.4M
Mar 1, 2017 Mar 3, 2017 LyondellBasell Industries N.V. 10% Owner Sell 32.5 -246,212 -0.29% ✗ $23.2M
Feb 22, 2017 Feb 24, 2017 LyondellBasell Industries N.V. 10% Owner Sell 42.5 -14,171 -0.02% ✗ $1.3M
May 2, 2016 Feb 14, 2017 LyondellBasell Industries N.V. 10% Owner Buy 47.5 +1 0.00% ✗ $84
Feb 10, 2017 Feb 14, 2017 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -1,167,905 -1.35% ✗ $107.8M
Feb 7, 2017 Feb 9, 2017 LyondellBasell Industries N.V. 10% Owner Sell 15.0 -3,032,095 -2.24% ✗ $279.8M