Sophie McCallum - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Sophie McCallum is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.
Profile
Sophie McCallum holds the role of Chief of Staff, Corp. Sec. at Deep Isolation Nuclear, Inc.. McCallum has reported 4 insider filings with the SEC since 2025. The most recent filing was in November 2025.
| Role | Chief of Staff, Corp. Sec. |
|---|---|
| Notability | 34/100 |
Board memberships
- Deep Isolation Nuclear, Inc.
Reported roles
- Chief of Staff, Corp. Sec.
Trading Pattern
InsiderAlpha's records for Sophie McCallum go back to 2025: 2 primary Form 4 filings, an average of 1.0 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 Sophie McCallum 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.
- Chief of Staff, Corp. Sec. at Deep Isolation Nuclear, Inc. (DBHL) - 2 filings, 2025
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2025-11-21 | DBHL | Deep Isolation Nuclear, Inc. | A - Grant or award | 6.8K | $0.00 | |
| 2025-10-01 | DBHL | Deep Isolation Nuclear, Inc. | A - Grant or award | 9.9K | $0.00 |
Most Active Insiders Right Now
Sophie McCallum has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- MetLife Investment Management, LLC - $1600000.00B of FINS open-market activity in the last 90 days
- Magnetar Financial LLC - $16357.48B of CRWV open-market activity in the last 90 days
- Marianne Okland - $18.46B of STNG open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $14.13B of SVRE open-market activity in the last 90 days
- Vanessa Allen Sutherland - $7.44B of PSX open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Carl Spana
- SPC Field Partners LLC
- Jacob Virgil Spellmeyer
- City Cadiz S.L. Sport
- Timothy A. Springer
- Eric Sprott
- SR ONE CAPITAL MANAGEMENT, LLC
- Murray Stahl
Frequently Asked Questions
Who is Sophie McCallum?
Sophie McCallum holds the role of Chief of Staff, Corp. Sec. at Deep Isolation Nuclear, Inc.. McCallum has reported 4 insider filings with the SEC since 2025. The most recent filing was in November 2025.…
Where can I see all of Sophie McCallum'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 Sophie McCallum profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.