Summary
Latest filing:
William M. Cook files SEC Form 4 reports at Mativ Holdings, Inc. (MATV). 7 SEC Form 4 filings on record going back to 2024, most recently on 7 July 2026. Most recent open-market trade: bought $29K of MATV on 2 June 2025. Lifetime open-market purchases: $60K.
Recent transactions
3The latest 3 SEC Form 4 transactions reported by William M. Cook.
Trading pattern
InsiderAlpha's records for William M. Cook go back to 2024: 7 primary Form 4 filings, an average of 2.3 per year. The typical open-market purchase is $30K (2 buys totaling $60K). The largest single buy on record is $31K of MATV in 2024. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
Other insiders active in the same stocks
Insiders who have reported open-market trades at the same companies as William M. Cook. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Shruti Singhal - $230K in MATV purchases and sales on record
- Amy Tufano - $99K in AXTA purchases and sales on record
- Kimberly E. Ritrievi - $59K in MATV purchases and sales on record
- Marco Levi - $58K in MATV purchases and sales on record
- John K. Stipancich - $32K in MATV purchases and sales on record
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Frequently asked questions
Who is William M. Cook?
William M. Cook is a corporate insider of Mativ Holdings, Inc. (MATV). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did William M. Cook last file a Form 4?
The most recent primary Form 4 on record is dated 7 July 2026, one of 7 filings going back to 2024.
Has William M. Cook been buying or selling stock?
Recorded transactions: 2 open-market purchases ($60K) and 0 open-market sales across all tracked filings.