Phillip Lancaster - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Phillip Lancaster has filed 1 SEC Form 4 filing across 1 company in the last 90 days.
Profile
Phillip Lancaster holds the role of Director at MAMMOTH ENERGY SERVICES, INC. (TUSK). Lancaster has reported 1 insider filing with the SEC since 2026. The most recent filing was in July 2026.
| Role | Director |
|---|---|
| Notability | 26/100 |
Board memberships
- MAMMOTH ENERGY SERVICES, INC.
Reported roles
- Director
Awards & honors
- Serves on the board of Mammoth Energy Services, Inc. (director)
Trading Pattern
InsiderAlpha's records for Phillip Lancaster go back to 2026: 1 primary Form 4 filing, 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 Phillip Lancaster 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 MAMMOTH ENERGY SERVICES, INC. (TUSK) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-01 | TUSK | MAMMOTH ENERGY SERVICES, INC. | J - Other acquisition / disposition | 68.2K | $0.00 |
Companies - Last 90 Days
- MAMMOTH ENERGY SERVICES, INC. (TUSK) - 1 filing, last 2026-07-01
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Phillip Lancaster 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.
- WEXFORD CAPITAL LP - $10.47M of TUSK open-market activity in the last 12 months
- Arthur H. Amron - $32K of TUSK open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Gjorgi Popstefanov
- Adam D. Portnoy
- David Portnoy
- PRUDENTIAL FINANCIAL INC
- PRUDENTIAL INSURANCE CO OF AMERICA
- PUBLIC INVESTMENT FUND
- Qatar Investment Authority
- R01 Fund LP
Frequently Asked Questions
Who is Phillip Lancaster?
Phillip Lancaster holds the role of Director at MAMMOTH ENERGY SERVICES, INC. (TUSK). Lancaster has reported 1 insider filing with the SEC since 2026. The most recent filing was in July 2026.…
How many SEC Form 4 filings has Phillip Lancaster submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Where can I see all of Phillip Lancaster'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 Phillip Lancaster profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.