Blavatnik Len — SEC Form 4 filings
SEC reporting owner CIK 1326628. 15 Form 4 filings on record with FilingPulse; latest filed 2026-05-15.
Transaction summary — filings shown
Covers all 15 filings on record, filed 2024-02-21 to 2026-05-15. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 2 legs across 2 filings — 3,175,000 shares, $32,475,000 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 33 legs across 6 filings — 8,522,769 shares, $762,972,482 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 23.
- Largest priced transaction: sale of 3,278,988 shares @ $150.30 ($492,831,896) in DigitalOcean Holdings, Inc., filed 2026-05-15.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| DigitalOcean Holdings, Inc. (DOCN) | — | 3 | — | 22 legs · 7,188,310 sh · $656,772,807 | 1 |
| Disc Medicine, Inc. (IRON) | 10% owner | 2 | — | 1 leg · 744,047 sh · $59,873,462 | 1 |
| LyondellBasell Industries N.V. (LYB) | 10% owner | 4 | — | 10 legs · 590,412 sh · $46,326,213 | 6 |
| Upstream Bio, Inc. (UPB) | 10% owner | 1 | 1 leg · 1,175,000 sh · $19,975,000 | — | 4 |
| Zura Bio Ltd (ZURA) | 10% owner | 1 | 1 leg · 2,000,000 sh · $12,500,000 | — | — |
| Warner Music Group Corp. (WMG) | 10% owner | 2 | — | — | 8 |
| Day One Biopharmaceuticals, Inc. (DAWN) | 10% owner | 2 | — | — | 3 |
Form 4 filings — Blavatnik Len
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-05-15 | 4 | DigitalOcean Holdings, Inc. (DOCN) jointly with Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC, AI Droplet Holdings LLC, AI Droplet Sharing LLC, AI Droplet Subsidiary LLC | Sale (S): 3,278,988 @ $150.30 · Sale (S): 21,012 @ $150.30 | EDGAR |
| 2026-05-11 | 4 | DigitalOcean Holdings, Inc. (DOCN) jointly with Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC, AI Droplet Holdings LLC, AI Droplet Sharing LLC, AI Droplet Subsidiary LLC | Sale (S): 12,845 @ $147.80 · Sale (S): 38,721 @ $148.67 · Sale (S): 33,657 @ $149.67 · Sale (S): 34,339 @ $150.84 · Sale (S): 34,242 @ $151.55 · Sale (S): 23,061 @ $152.80 · +13 more | EDGAR |
| 2026-04-27 | 4 | Day One Biopharmaceuticals, Inc. (DAWN) jointly with AI Day1 LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Code (U): 12,929,322 @ $21.50 · Disposition to issuer (D): 827,586 (derivative) @ $21.50 | EDGAR |
| 2026-04-20 | 4 | Warner Music Group Corp. (WMG) jointly with AI Entertainment Holdings LLC, AIBFF, Inc., ACCESS INDUSTRIES, LLC, Access Industries Core Holdings LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC, Entertainment Holdings II LLC | Other (J): 280,000 (derivative) | EDGAR |
| 2026-03-11 | 4 | LyondellBasell Industries N.V. (LYB) jointly with AI INVESTMENTS HOLDINGS LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES, LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Gift (G): 464,610 @ $0 · Sale (S): 80,679 @ $67.03 · Sale (S): 177 @ $67.03 · Sale (S): 189,277 @ $68.13 · Sale (S): 414 @ $68.13 · Sale (S): 114,592 @ $68.90 · +1 more | EDGAR |
| 2026-03-02 | 4 | Zura Bio Ltd (ZURA) jointly with AI Biotechnology LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Purchase (P): 2,000,000 @ $6.25 | EDGAR |
| 2025-10-24 | 4 | Disc Medicine, Inc. (IRON) jointly with AI DMI LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Sale (S): 744,047 @ $80.47 | EDGAR |
| 2025-06-13 | 4 | LyondellBasell Industries N.V. (LYB) jointly with ACCESS INDUSTRIES, LLC, AI INVESTMENTS HOLDINGS LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Purchase (P): 30 (derivative) @ $1,196,560.78 | EDGAR |
| 2025-06-06 | 4 | DigitalOcean Holdings, Inc. (DOCN) jointly with Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC, AI Droplet Holdings LLC, AI Droplet Sharing LLC, AI Droplet Subsidiary LLC | Sale (S): 1,509,444 @ $28.60 · Sale (S): 1,987,060 @ $28.60 | EDGAR |
| 2024-12-23 | 4 | Warner Music Group Corp. (WMG) jointly with AI Entertainment Holdings LLC, WMG Management Holdings, LLC, AI Entertainment Management, LLC, Altep 2012 L.P., AIBFF, Inc., ACCESS INDUSTRIES, LLC, AIPH Holdings LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Other (J): 1,626,518 (derivative) · Other (J): 1,626,518 (derivative) · Other (J): 6,927,734 (derivative) · Other (J): 6,898,638 (derivative) · Other (J): 29,096 (derivative) · Other (J): 487,929 (derivative) · +1 more | EDGAR |
| 2024-10-17 | 4 | Upstream Bio, Inc. (UPB) jointly with AI Upstream LLC, AI Biotechnology LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Purchase (P): 1,175,000 @ $17 · Conversion (C): 3,147,000 · Conversion (C): 1,172,410 · Conversion (C): 3,147,000 (derivative) · Conversion (C): 1,172,410 (derivative) | EDGAR |
| 2024-08-05 | 4 | Day One Biopharmaceuticals, Inc. (DAWN) jointly with AI Day1 LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Purchase (P): 827,586 (derivative) @ $14.50 | EDGAR |
| 2024-06-20 | 4 | Disc Medicine, Inc. (IRON) jointly with AI DMI LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Grant/award (A): 416,667 @ $36 | EDGAR |
| 2024-02-29 | 4 | LyondellBasell Industries N.V. (LYB) jointly with AI INVESTMENTS HOLDINGS LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES, LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Other (J): 3,321 @ $0 · Other (J): 3,321 @ $0 · Other (J): 39,383 @ $0 · Other (J): 18,537 @ $0 | EDGAR |
| 2024-02-21 | 4 | LyondellBasell Industries N.V. (LYB) jointly with AI INVESTMENTS HOLDINGS LLC, Access Industries Holdings LLC, ACCESS INDUSTRIES, LLC, ACCESS INDUSTRIES MANAGEMENT, LLC | Sale (S): 19,083 @ $97.79 · Sale (S): 5,371 @ $98.26 · Sale (S): 140,909 @ $97.79 · Sale (S): 39,659 @ $98.26 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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