Thomas S. Glanville - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Thomas S. Glanville has filed 2 SEC Form 4 filings across 2 companies in the last 90 days.
Profile
Thomas S. Glanville serves as Director of DEEP FISSION, INC.. Glanville has also held reporting roles at MIND TECHNOLOGY, INC (MIND). Glanville has reported 2 insider filings with the SEC since 2025. The most recent filing was in March 2026.
| Role | Director |
|---|---|
| Notability | 26/100 |
Board memberships
- DEEP FISSION, INC.
- MIND TECHNOLOGY, INC
Reported roles
- Director
- Director
Trading Pattern
InsiderAlpha's records for Thomas S. Glanville go back to 2025: 4 primary Form 4 filings, an average of 2.0 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.
Career & Filing History
Every role Thomas S. Glanville has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Director at MIND TECHNOLOGY, INC (MIND) - 2 filings, 2025 to 2026
- Director at DEEP FISSION, INC. (FISN) - 1 filing, 2026
- Director at DEEP FISSION, INC. (FISN) - 1 filing, 2026
Companies - Last 90 Days
- MIND TECHNOLOGY, INC (MIND) - 1 filing, last 2026-07-31
- DEEP FISSION, INC. (FISN) - 1 filing, last 2026-07-27
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Thomas S. Glanville has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Mark N. Tompkins - $2 of FISN open-market activity in the last 12 months
- Ian Seth Jacobs - $2 of FISN open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Motor Corp/ Toyota
- TPG GP A, LLC
- Chrysler Retirees Medical Benefits Plan Uaw
- Uber Technologies, Inc
- UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO
- VAN ECK ASSOCIATES CORP
- Weegen Felice Isabel Verduyn-Van
- Viking Cake BR, LLC
Frequently Asked Questions
Who is Thomas S. Glanville?
Thomas S. Glanville serves as Director of DEEP FISSION, INC.. Glanville has also held reporting roles at MIND TECHNOLOGY, INC (MIND). Glanville has reported 2 insider filings with the SEC since 2025. The most recent filing was in March 2026.…
How many SEC Form 4 filings has Thomas S. Glanville submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Where can I see all of Thomas S. Glanville'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.
Learn More
Open the live Thomas S. Glanville profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.