Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Frank E. Thomas 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.
- James E. Flynn - $25.00M in LRMR purchases and sales in the last 12 months
- Thomas Edward Hamilton - $667K in LRMR purchases and sales in the last 12 months
- Esther Rajavelu - $407K in SPRO purchases and sales in the last 12 months
- Timothy Keutzer - $145K in SPRO purchases and sales in the last 12 months
- Jeffrey W. Sherman - $25K in LRMR purchases and sales in the last 12 months
More insiders (A-Z)
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Frequently asked questions
Who is Frank E. Thomas?
Frank E. Thomas is a corporate insider of Spero Therapeutics, Inc. (SPRO). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Frank E. Thomas last file a Form 4?
The most recent primary Form 4 on record is dated 25 June 2026, one of 5 filings going back to 2025.
Has Frank E. Thomas been buying or selling stock?
Recorded transactions: 1 open-market purchase ($25K) and 0 open-market sales across all tracked filings.
