Summary
Updated Aug 30, 2026
Mark L. Arnold is President, Rasmussen of AMERICAN PUBLIC EDUCATION INC (APEI). 2 SEC Form 4 filings on record, most recently on 12 March 2026.
Recent Transactions
4Every recent SEC Form 4 transaction Mark L. Arnold has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark L. Arnold 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.
- 325 CAPITAL LLC - $18.96M of APEI open-market activity in the last 12 months
- Tanya Joy Axenson - $1.47M of APEI open-market activity in the last 12 months
- Nuno S. Fernandes - $1.24M of APEI open-market activity in the last 12 months
- Thomas Beckett - $638K of APEI open-market activity in the last 12 months
- Karmela Gaffney - $151K of APEI open-market activity in the last 12 months
- James Kenigsberg - $60K of APEI open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Mark L. Arnold?
Mark L. Arnold is a corporate insider, tracked as President, Rasmussen of AMERICAN PUBLIC EDUCATION INC (APEI). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Mark L. Arnold last file a Form 4?
The most recent primary Form 4 on record is dated 12 March 2026, one of 2 filings going back to 2026.
Where can I see all of Mark L. Arnold'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
Follow Mark L. Arnold and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
