Summary
Updated Aug 30, 2026
William G. Rice is Chair, President & CEO of Aptose Biosciences Inc. (APTO). 2 SEC Form 4 filings on record going back to 2024, most recently on 1 July 2026. Most recent open-market trade: bought $20K of APTO on 26 November 2024. Lifetime open-market purchases: $20K.
Recent Transactions
2Every recent SEC Form 4 transaction William G. Rice has reported, most recent first.
Most Active Insiders Right Now
William G. Rice has no co-filers on record, so these are insiders with the largest open-market activity across the market in the last 90 days.
- Andreas Bechtolsheim - $393.27M of ANET open-market activity in the last 90 days
- WINDACRE PARTNERSHIP LLC - $391.22M of PRM open-market activity in the last 90 days
- Michael N. Intrator - $388.40M of CRWV open-market activity in the last 90 days
- AEROEQUITY GP, LLC - $384.00M of FLY open-market activity in the last 90 days
- Jayshree Ullal - $365.88M of ANET open-market activity in the last 90 days
- Jeffrey P. Bezos - $346.45M of AMZN open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is William G. Rice?
William G. Rice is a corporate insider, tracked as Chair, President & CEO of Aptose Biosciences Inc. (APTO). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has William G. Rice submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has William G. Rice been buying or selling stock?
Recorded transactions: 2 open-market purchases ($20K) and 0 open-market sales across all tracked filings.
Where can I see all of William G. Rice'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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