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PE

Brian E Peierls

10%+ Owner5%+ Owner1%+ Owner
Current role
10%+ Owner · Riot
Current holdings (from latest Form 3/4/5)
Riot RIOT: 2,044,728 shares ≈ $44.74M (0.54% of co.) (as of 2007-04-17)
Insider activity since 2005-11
Invested $2.78M (2,103,946 shares acquired)
↳ notional today: $46.03M
Divested $0 (- shares sold)
→ Net invested $2.78M
↳ net notional: ↑ $46.03M
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.

CompanyRoleTenureFilings
Riot10%+ Owner2005-05 → present (21y 4mo)3
Show 3 underlying filings
2007-04-17 · Riot Form 4 filed 2007-04-18
View cached copy (2026-09-13)Live source ↗
2005-11-23 · Riot Form 4 filed 2005-11-28
View cached copy (2026-09-13)Live source ↗
2005-05-06 · Riot Form 3 filed 2005-05-16
View cached copy (2026-09-13)Live source ↗

Insider transactions

Totals for this person

BucketInvested (shares)Invested (USD)Divested (shares)Divested (USD)Net directionTxnsInvested @ last priceDivested @ last price
All time2,103,946$2.78M-$0↑ Invested $2.78M6$46.03M$0
20072,055,718$2.78M-$0↑ Invested $2.78M4$44.98M$0
200548,228$0-$0Flat2$1.06M$0
2005-Q448,228$0-$0Flat2$1.06M$0
2007-Q22,055,718$2.78M-$0↑ Invested $2.78M4$44.98M$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

DateCompanyKindSharesAmount (USD)Value @ last price
2007-04-17RiotIn/at-money option exercise58,000$78,300$1.27M
2007-04-17RiotIn/at-money option exercise969,859$1,309,310$21.22M
2007-04-17RiotIn/at-money option exercise · Common Stock Warrants (right to buy)58,000$78,300$1.27M
2007-04-17RiotIn/at-money option exercise · Common Stock Warrants (right to buy)969,859$1,309,310$21.22M
2005-11-23RiotOther acquisition / disposition2,721-$59.5K
2005-11-23RiotOther acquisition / disposition45,507-$995.7K