Len Blavatnik
CIK 1326628 · last filed 2026-04-20
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
LYB price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
730 FIFTH AVENUE
NEW YORK, NY 10019
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| WMG | 10%+ Owner | — | $31.79 | — | $0 | 1 | 2026-04-20 |
| IRON | 10%+ Owner | 3,558,426 | $81.26 | $289.16M | $10.00M | 2 | 2024-06-20 |
| Day One Biopharmaceuticals, Inc. (DAWN) Delisted | 11,453,868 | $21.53 | $246.60M | $10.00M | 1 | 2023-06-12 | |
| LYB | 10%+ Owner | 770,038 | $59.50 | $45.82M | -$442.06M | 8 | 2022-12-05 |
| Neon Therapeutics, Inc. (NTGN) Delisted | 2,752,480 | — | — | -$552.8K | 1 | 2020-03-25 | |
| Loxo Oncology, Inc. (LOXO) Delisted | 10%+ Owner | 1,368,339 | — | — | $0 | 1 | 2014-08-06 |
Recent Filings · Page 2 of 2
15 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2021-02-17 | LYB | Sell (S) | −393,780 | -$37.65M | EDGAR |
| 2020-12-08 | LYB | Sell (S) | −518,691 | -$45.95M | EDGAR |
| 2020-03-25 | Neon Therapeutics, Inc. (NTGN) Delisted | Sell (S) | −252,044 | -$552.8K | EDGAR |
| 2014-08-06 | Loxo Oncology, Inc. (LOXO) Delisted | Conv (C) | +1,368,339 | $0 | EDGAR |
| 2007-05-08 | — | Other (J) | +3,531,089 | $0 |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.