Blavatnik Len

10% owner at Yarrow Bioscience, Inc. · on record since Nov 13, 2023
10% owner at Upstream Bio, Inc. · on record since Oct 17, 2024
Director at Warner Music Group Corp. · on record since May 8, 2007
10% owner at Zura Bio Ltd · on record since May 28, 2025
Insider at Day One Biopharmaceuticals, Inc. · on record since May 26, 2021
10% owner at LyondellBasell Industries N.V. · on record since Jan 24, 2011
10% owner at OnKure Therapeutics, Inc. · on record since Apr 7, 2026
10% owner at Warner Music Group Corp. · on record since Apr 20, 2026
10% owner at Day One Biopharmaceuticals, Inc. · on record since Apr 27, 2026
10% owner at Hemab Therapeutics Holdings, Inc. · on record since May 14, 2026
10% owner at EP Energy Corp · on record since Jan 23, 2014
10% owner at Loxo Oncology, Inc. · on record since Jul 31, 2014
10% owner at Block, Inc. · on record since Nov 25, 2015
Insider at Neon Therapeutics, Inc. · on record since Jun 26, 2018
Insider at Chemomab Therapeutics Ltd. · on record since Jan 2, 2020
10% owner at Pandion Therapeutics, Inc. · on record since Jul 16, 2020
Insider at DigitalOcean Holdings, Inc. · on record since Mar 30, 2021
Insider at Climb Bio, Inc. · on record since Aug 16, 2021
10% owner at · on record since Jan 13, 2022
10% owner at · on record since Aug 17, 2022
10% owner at · on record since Feb 17, 2023
Insider at · on record since Mar 16, 2023

Insider trading activity of Blavatnik Len

Transactions on record: 87; since May 8, 2007

Open-market buys: 8; $157.9M

Open-market sells: 58; $857.2M

Companies traded: 8; last filing Mar 11, 2026

Figures computed from official regulatory filings — .

Companies where Blavatnik Len has traded

59 tx · $565.9M · Mar 11, 2026
17 tx · $348.2M · Dec 23, 2024
1 tx · $10M · Jun 20, 2023
2 tx · $28M · Jun 12, 2023
1 tx · $6.3M · Aug 17, 2022
2 tx · $209.9K · Mar 23, 2020
3 tx · Aug 6, 2014
2 tx · $66.5M · Jan 23, 2014

Track record of Blavatnik Len

Statistical track record

Free account

Open-market buys: 9

Last buy: Jun 16, 2023

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of Blavatnik Len

Co-insiders of Blavatnik Len

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-189,277	68.13 USD	$12.9M		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-177	67.03 USD	$11.9K		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Gift	-464,610	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-414	68.13 USD	$28.2K		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-114,592	68.90 USD	$7.9M		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-251	68.90 USD	$17.3K		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-80,679	67.03 USD	$5.4M		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	-487,929	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	-1,626,518	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	487,929	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	29,096	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	6,898,638	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	1,626,518	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	-6,927,734	—	n/a (No price was disclosed in the filing)		SEC
Disc Medicine, Inc.Listing on record	Jun 20, 2023	BuyD (derivative)	204,081	49.00 USD	$10M		SEC
Day One Biopharmaceuticals, Inc.Listing unverified	Jun 12, 2023	Buy	769,230	13.00 USD	$10M	conv 29	SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-236	84.68 USD	$20K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-143	85.93 USD	$12.3K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-561	84.85 USD	$47.6K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-154	84.85 USD	$13.1K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-39	85.93 USD	$3.4K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-86	85.93 USD	$7.4K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-186,135	85.93 USD	$16M		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-26	84.68 USD	$2.2K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-9	85.93 USD	$773.4		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-189,277	68.13 USD	$12.9M		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-177	67.03 USD	$11.9K		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Gift	-464,610	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-414	68.13 USD	$28.2K		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-114,592	68.90 USD	$7.9M		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-251	68.90 USD	$17.3K		SEC
LyondellBasell Industries N.V.Listing on record	Mar 11, 2026	Sell	-80,679	67.03 USD	$5.4M		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	-487,929	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	-1,626,518	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	487,929	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	29,096	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	6,898,638	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	1,626,518	—	n/a (No price was disclosed in the filing)		SEC
Warner Music Group Corp.Listing on record	Dec 23, 2024	OtherD (derivative)	-6,927,734	—	n/a (No price was disclosed in the filing)		SEC
Disc Medicine, Inc.Listing on record	Jun 20, 2023	BuyD (derivative)	204,081	49.00 USD	$10M		SEC
Day One Biopharmaceuticals, Inc.Listing unverified	Jun 12, 2023	Buy	769,230	13.00 USD	$10M	conv 29	SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-236	84.68 USD	$20K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-143	85.93 USD	$12.3K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-561	84.85 USD	$47.6K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-154	84.85 USD	$13.1K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-39	85.93 USD	$3.4K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-86	85.93 USD	$7.4K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-186,135	85.93 USD	$16M		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-26	84.68 USD	$2.2K		SEC
LyondellBasell Industries N.V.Listing on record	Dec 5, 2022	Sell	-9	85.93 USD	$773.4		SEC