Len Blavatnik
Len Blavatnik is number 167 in the 311 Private Wealth Index, with disclosed holdings in listed companies worth about $772m, mainly in LyondellBasell Industries N.V. That is about 4,008 times the wealth of a typical US household. Len Blavatnik is a 10% owner of LyondellBasell Industries N.V.
Part of the 311 Private Wealth Index (311institute.com). Last updated .
Disclosed holdings
| Company | Value | Latest filing | Shares |
|---|---|---|---|
| LyondellBasell Industries N.V. | $463m | 11 March 2026 | 6,802,142 at $68.13 |
| Disc Medicine, Inc. | $159m | 24 October 2025 | 2,814,379 at $56.65 (closing price, 15 October 2026) |
| Hemab Therapeutics Holdings, Inc. | $121m | 14 May 2026 | 4,876,344 at $24.89 |
| Zura Bio Ltd | $28m | 2 March 2026 | 6,552,725 at $4.28 (closing price, 15 October 2026) |
How this figure is calculated
Shares reported in SEC insider filings (Forms 3, 4 and 5), at the latest holding each filing reports, valued at the latest price disclosed in those filings, or at the latest closing price where no recent trade price was filed. Holdings that the filings say belong to investment funds managed by the person are left out, and shares reported jointly by several family members are counted once. Private companies, cash, property and holdings listed outside the United States are not included, so this is a minimum, not total wealth. The household comparison uses $192,700, the median US household wealth in the Federal Reserve Survey of Consumer Finances (2022, the latest published).
Related
- LyondellBasell Industries N.V. in the 311 Titans Index
- Innovation profile of New York
- United States: economy and key statistics
- The 311 Private Wealth Index
- The 311 Titans Index
- All 311 Indexes
Questions and answers
What is Len Blavatnik's net worth?
Len Blavatnik has disclosed holdings in listed companies worth about $772m, according to the 311 Private Wealth Index. This is a minimum: private companies, cash and property are not included.
How much are Len Blavatnik's disclosed holdings worth?
About $772m in listed companies, ranking Len Blavatnik number 167 in the 311 Private Wealth Index.
Where does Len Blavatnik's wealth come from?
Mainly from holdings in LyondellBasell Industries N.V. Len Blavatnik is a 10% owner of LyondellBasell Industries N.V.
Source: SEC insider filings.
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