CM
Current role
Chief Scientific Officer · Riot
Insider activity since 2010-01
Invested $0 (60,000 shares acquired)
↳ notional today: $1.31M
Divested $0 (- shares sold)
→ Net flat $0
↳ net notional: ↑ $1.31M
Change since first tracked filing (not total holdings; see methodology). Prices as of 2026-09-17.
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 |
|---|---|---|---|
| Riot | Chief Scientific Officer | 2009-02 → present (17y 7mo) | 3 |
Show 3 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 | 60,000 | $0 | - | $0 | Flat | 2 | $1.31M | $0 |
| 2011 | 10,000 | $0 | - | $0 | Flat | 1 | $218.8K | $0 |
| 2010 | 50,000 | $0 | - | $0 | Flat | 1 | $1.09M | $0 |
| 2010-Q1 | 50,000 | $0 | - | $0 | Flat | 1 | $1.09M | $0 |
| 2011-Q1 | 10,000 | $0 | - | $0 | Flat | 1 | $218.8K | $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 2026-09-17); 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 |
|---|---|---|---|---|---|
| 2011-01-05 | Riot | Grant / award / vesting · Stock Option (Right to Buy) | 10,000 | - | $218.8K |
| 2010-01-19 | Riot | Grant / award / vesting · Option -Right to Buy | 50,000 | - | $1.09M |