Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies William K. Lieberman 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.
- Louis Berkman Investment CO - $248K in AP purchases and sales in the last 12 months
- Brett McBrayer - $129K in AP purchases and sales in the last 12 months
- Michael I. German - $106K in AP purchases and sales in the last 12 months
- Samuel Lyon - $99K in AP purchases and sales in the last 12 months
- Darrell L. McNair - $34K in AP purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is William K. Lieberman?
William K. Lieberman is a corporate insider of AMPCO PITTSBURGH CORP (AP). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did William K. Lieberman last file a Form 4?
The most recent primary Form 4 on record is dated 18 May 2026, one of 2 filings going back to 2025.
