William M. Cook

Filings by William M. Cook span 5 companies, the busiest being Axalta Coating Systems Ltd., Mativ Holdings, Inc. and IDEX Corp /DE/. We count 20 filings; the first trade dates from 18 December 2015 and the latest from 4 March 2026.

On the market, this insider has only ever bought: 7 purchases, €263k in total. Unlike grants, an open-market purchase is paid for by the insider, at the market price. Besides market trades, the filings include 5 share grants and 6 option exercises.

A typical purchase (the median) is worth €37k. Clusters matter here: 5 out of 7 purchases overlapped with buying by a colleague within 30 days. Purchases made close together by different insiders form what is called a cluster.

On 5 March 2026 came the latest disclosure, an option exercise in Axalta Coating Systems Ltd. The most recent open-market purchase was published on 2 June 2025, 503 days ago. The median gap between a trade and its publication by SEC (Form 4) is 2 days. US insiders must file a Form 4 within two business days of a trade. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.