Stephen P. Herbert - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Stephen P. Herbert is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.
Profile
Stephen P. Herbert is a corporate insider at Armada Acquisition Corp. III (AACIU). SEC records also connect Herbert to Armada Acquisition Corp. II (AACIU). Herbert has reported 2 insider filings with the SEC since 2025. The most recent filing was in March 2026.
| Role | Chief Executive Officer, Chairman, and Director |
|---|---|
| Notability | 20/100 |
Board memberships
- Armada Acquisition Corp. III
- Armada Acquisition Corp. II
Trading Pattern
InsiderAlpha's records for Stephen P. Herbert 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 Stephen P. Herbert 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.
- Insider at Armada Acquisition Corp. III (AACIU) - 1 filing, 2026
- CEO at Armada Acquisition Corp. II (AACIU) - 1 filing, 2025
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2025-08-12 | AACIU | Armada Acquisition Corp. II | S - Open-market sale | 400.0K | - |
Most Active Insiders Right Now
Stephen P. Herbert 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:
- Joseph Stilwell
- William P. Stiritz
- SUMITOMO MITSUI FINANCIAL GROUP, INC.
- Suva
- SUVRETTA CAPITAL MANAGEMENT, LLC
- Donald William Swanson
- Synchron
- Kevin Tang
Frequently Asked Questions
Who is Stephen P. Herbert?
Stephen P. Herbert is a corporate insider at Armada Acquisition Corp. III (AACIU). SEC records also connect Herbert to Armada Acquisition Corp. II (AACIU). Herbert has reported 2 insider filings with the SEC since 2025. The most recent filing was in March 2026.…
Has Stephen P. Herbert been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale across all tracked filings.
Where can I see all of Stephen P. Herbert'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 Stephen P. Herbert profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.