Summary
Updated Aug 31, 2026
Mark A. Shaffer is Chief Legal Officer & Corp Sec of LIQUIDITY SERVICES INC (LQDT). 12 SEC Form 4 filings on record going back to 2024, most recently on 25 August 2026. Most recent open-market trade: sold $1.54M of LQDT on 26 May 2026. Lifetime open-market sales: $1.82M.
Recent Transactions
20Every recent SEC Form 4 transaction Mark A. Shaffer has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mark A. Shaffer go back to 2024: 12 primary Form 4 filings, an average of 4.0 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.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark A. Shaffer 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.
- Jaime Mateus-Tique - $6.34M of LQDT open-market activity in the last 12 months
- Jorge Celaya - $2.20M of LQDT open-market activity in the last 12 months
- William P. Angrick III - $1.60M of LQDT open-market activity in the last 12 months
- Steven Weiskircher - $928K of LQDT open-market activity in the last 12 months
- John Daunt - $801K of LQDT open-market activity in the last 12 months
- Novelette Murray - $268K of LQDT 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 A. Shaffer?
Mark A. Shaffer is a corporate insider, tracked as Chief Legal Officer & Corp Sec of LIQUIDITY SERVICES INC (LQDT). InsiderAlpha holds 12 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mark A. Shaffer submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Mark A. Shaffer been buying or selling stock?
Recorded transactions: 0 open-market purchases and 7 open-market sales ($1.82M) across all tracked filings.
Where can I see all of Mark A. Shaffer'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 A. Shaffer 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