Summary
Updated Aug 30, 2026
Mark Chalmers is CEO of ENERGY FUELS INC (UUUU). 4 SEC Form 4 filings on record going back to 2025, most recently on 16 April 2026. Most recent open-market trade: sold $2.34M of UUUU on 20 November 2025. Lifetime open-market sales: $2.34M.
Recent Transactions
4Every recent SEC Form 4 transaction Mark Chalmers has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark Chalmers 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.
- Dennis Lyle Higgs - $1.50M of UUUU open-market activity in the last 12 months
- Timothy James Carstens - $1.43M of UUUU open-market activity in the last 12 months
- Alex G. Morrison - $1.15M of UUUU open-market activity in the last 12 months
- Ross R. Bhappu - $968K of UUUU open-market activity in the last 12 months
- Daniel Kapostasy - $752K of UUUU open-market activity in the last 12 months
- Curtis Moore - $621K of UUUU 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 Mark Chalmers?
Mark Chalmers is a corporate insider, tracked as CEO of ENERGY FUELS INC (UUUU). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Mark Chalmers last file a Form 4?
The most recent primary Form 4 on record is dated 16 April 2026, one of 4 filings going back to 2025.
Has Mark Chalmers been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($2.34M) across all tracked filings.
Where can I see all of Mark Chalmers'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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