Elena Bunina became a non-executive director of Nebius Group in August 2024 and currently serves as Head of Science and Education for the company. She is an accomplished mathematician and Israel-based businesswoman with over 70 published research papers focusing on algebra and model theory.
Ms. Bunina previously served as Head of Academic and Educational Services across Nebius Group and as General Director and director of Human Resources of the company's former Russian subsidiary until April 2022. She holds a Doctor of Science degree and a Ph.D in Mathematics from Moscow State University's faculty of Mechanics and Mathematics, where she served as a professor for 12 years until 2022. She is currently a professor of Mathematics at Bar Ilan University in Israel.
Ms. Bunina is married to Roman Chernin, Nebius Group's Chief Business Officer and co-founder.
Biography extracted from Nebius 20-F filed 2026-04-30 View cached copy (2026-08-31)Live source ↗
Roles
Contiguous filings for the same role are collapsed into a single tenure span. Click a row to see the underlying filings.
| Company | Role | Tenure | Filings |
|---|---|---|---|
| Nebius | Director | 2026-04 → present (5mo) | 5 |
Show 5 underlying filings | |||
Insider transactions
Totals for this person
| Bucket | Invested (shares) | Invested (USD) | Divested (shares) | Divested (USD) | Net direction | Txns | Invested @ last price | Divested @ last price |
|---|---|---|---|---|---|---|---|---|
| All time | 1,352 | $0 | 47,655 | $8.26M | ↓ Divested $8.26M | 9 | $306.1K | $10.79M |
| 2026 | 1,352 | $0 | 47,655 | $8.26M | ↓ Divested $8.26M | 9 | $306.1K | $10.79M |
| 2026-Q2 | - | $0 | 47,655 | $8.26M | ↓ Divested $8.26M | 8 | $0 | $10.79M |
| 2026-Q3 | 1,352 | $0 | - | $0 | Flat | 1 | $306.1K | $0 |
Invested = shares acquired (buys, grants, option exercises) — insider adding to the position. Divested = shares reduced (sells, dispositions, tax-withholding) — cash flowing TO the insider. Net direction shows which side wins on dollar terms in each bucket. % of holder's stake not yet computed (pending Form 3/4 holdings ingest). See methodology. The two @ last price columns restate the same share counts at the most recent share price we read (close of 2026-09-04); they are a valuation, not a cash flow, and they move every day the market does.
All transactions
| Date | Company | Kind | Shares | Amount (USD) | Value @ last price |
|---|---|---|---|---|---|
| 2026-09-01 | Nebius | Grant / award / vesting · Class A Shares | 1,352 | - | $306.1K |
| 2026-05-13 | Nebius | Open-market sale · Class A Shares | 5,894 | $1,237,740 | $1.33M |
| 2026-05-13 | Nebius | Open-market sale · Class A Shares | 5,000 | $1,015,900 | $1.13M |
| 2026-05-06 | Nebius | Open-market sale · Class A Shares | 5,263 | $999,970 | $1.19M |
| 2026-05-06 | Nebius | Open-market sale · Class A Shares | 5,556 | $1,000,080 | $1.26M |
| 2026-05-04 | Nebius | Open-market sale · Class A Shares | 5,882 | $999,940 | $1.33M |
| 2026-04-14 | Nebius | Open-market sale · Class A Shares | 6,250 | $1,007,625 | $1.41M |
| 2026-04-13 | Nebius | Open-market sale · Class A Shares | 6,667 | $1,000,050 | $1.51M |
| 2026-04-10 | Nebius | Open-market sale · Class A Shares | 7,143 | $1,000,020 | $1.62M |