Summary
Updated Aug 31, 2026
William Richard Jackman is EVP, GENERAL COUNSEL of Riot Platforms, Inc. (RIOT). 1 SEC Form 4 filing on record, dated 10 September 2025. Most recent open-market trade: sold $3.92M of RIOT on 10 September 2025. Lifetime open-market sales: $3.92M.
Recent Transactions
1Every recent SEC Form 4 transaction William Richard Jackman has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William Richard Jackman go back to 2025: 1 primary Form 4 filing, an average of 0.5 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies William Richard Jackman files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Jason Les - $9.30M of RIOT open-market activity in the last 12 months
- Ryan D. Werner - $3.55M of RIOT open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is William Richard Jackman?
William Richard Jackman is a corporate insider, tracked as EVP, GENERAL COUNSEL of Riot Platforms, Inc. (RIOT). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did William Richard Jackman last file a Form 4?
The only primary Form 4 on record is dated 10 September 2025.
Has William Richard Jackman been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($3.92M) across all tracked filings.
Where can I see all of William Richard Jackman's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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