COOK WILLIAM M

Director at DONALDSON Co INC · on record since Jun 25, 2008
Director at IDEX CORP /DE/ · on record since Apr 10, 2008
Director at VALSPAR CORP · on record since Apr 27, 2010
Director at Neenah Inc · on record since Jul 25, 2016
Director at Axalta Coating Systems Ltd. · on record since Jun 3, 2019
Director at Mativ Holdings, Inc. · on record since Sep 20, 2022
Chairman, President and CEO at DONALDSON Co INC · on record since Aug 24, 2005

Insider trading activity of COOK WILLIAM M

Transactions on record: 615; since Aug 27, 2003

Open-market buys: 10; $413.5K

Open-market sells: 8; $2.8M

Companies traded: 6; last filing Jul 6, 2026

Figures computed from official regulatory filings — .

Companies where COOK WILLIAM M has traded

Mativ Holdings, Inc.43 tx · $844.3K · Jul 6, 2026
Axalta Coating Systems Ltd.25 tx · $163.4K · Mar 5, 2026
Neenah Inc8 tx · $585.5K · Jul 29, 2022
IDEX CORP /DE/39 tx · $2.3M · May 10, 2022
VALSPAR CORP32 tx · $3.4M · Jun 5, 2017
DONALDSON Co INC468 tx · $51M · Mar 23, 2016

Track record of COOK WILLIAM M

Statistical track record

Free account

Open-market buys: 10

Last buy: May 29, 2025

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of COOK WILLIAM M

Co-insiders of COOK WILLIAM M

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	658	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	968	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	1,075	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	19,815	—	n/a (No price was disclosed in the filing)		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 5, 2026	Exercise	5,832	—	n/a (No price was disclosed in the filing)		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 5, 2026	ExerciseD (derivative)	-5,832	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 5, 2026	AwardD (derivative)	6,313	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Mativ Holdings, Inc.Listing on record	Jan 5, 2026	AwardD (derivative)	793	11.82 USD	$9.4K		SEC
Mativ Holdings, Inc.Listing on record	Jan 5, 2026	AwardD (derivative)	306	12.49 USD	$3.8K		SEC
Mativ Holdings, Inc.Listing on record	Oct 3, 2025	AwardD (derivative)	439	12.57 USD	$5.5K		SEC
Mativ Holdings, Inc.Listing on record	Oct 3, 2025	AwardD (derivative)	1,271	11.31 USD	$14.4K		SEC
Mativ Holdings, Inc.Listing on record	Oct 3, 2025	AwardD (derivative)	2,108	6.82 USD	$14.4K		SEC
Mativ Holdings, Inc.Listing on record	Jul 2, 2025	AwardD (derivative)	18,328	6.82 USD	$125K	Unusual size	SEC
Mativ Holdings, Inc.Listing on record	Jul 2, 2025	AwardD (derivative)	615	5.55 USD	$3.4K		SEC
Mativ Holdings, Inc.Listing on record	Jun 2, 2025	Buy	5,000	5.84 USD	$29.2K	conv 50Cluster	SEC
Mativ Holdings, Inc.Listing on record	Apr 3, 2025	AwardD (derivative)	5,008	6.24 USD	$31.2K		SEC
Mativ Holdings, Inc.Listing on record	Apr 3, 2025	AwardD (derivative)	438	6.07 USD	$2.7K		SEC
Mativ Holdings, Inc.Listing on record	Apr 3, 2025	AwardD (derivative)	2,103	6.24 USD	$13.1K		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 6, 2025	AwardD (derivative)	5,832	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 4, 2025	ExerciseD (derivative)	-6,157	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 4, 2025	Exercise	6,157	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jan 7, 2025	AwardD (derivative)	1,060	10.90 USD	$11.6K		SEC
Mativ Holdings, Inc.Listing on record	Jan 7, 2025	AwardD (derivative)	2,866	10.90 USD	$31.2K		SEC
Mativ Holdings, Inc.Listing on record	Jan 7, 2025	AwardD (derivative)	171	13.15 USD	$2.2K		SEC
Mativ Holdings, Inc.Listing on record	Nov 15, 2024	Buy	2,500	12.45 USD	$31.1K	conv 41First in 12mo	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	658	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	968	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	1,075	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jul 6, 2026	AwardD (derivative)	19,815	—	n/a (No price was disclosed in the filing)		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 5, 2026	Exercise	5,832	—	n/a (No price was disclosed in the filing)		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 5, 2026	ExerciseD (derivative)	-5,832	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 5, 2026	AwardD (derivative)	6,313	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Mativ Holdings, Inc.Listing on record	Jan 5, 2026	AwardD (derivative)	793	11.82 USD	$9.4K		SEC
Mativ Holdings, Inc.Listing on record	Jan 5, 2026	AwardD (derivative)	306	12.49 USD	$3.8K		SEC
Mativ Holdings, Inc.Listing on record	Oct 3, 2025	AwardD (derivative)	439	12.57 USD	$5.5K		SEC
Mativ Holdings, Inc.Listing on record	Oct 3, 2025	AwardD (derivative)	1,271	11.31 USD	$14.4K		SEC
Mativ Holdings, Inc.Listing on record	Oct 3, 2025	AwardD (derivative)	2,108	6.82 USD	$14.4K		SEC
Mativ Holdings, Inc.Listing on record	Jul 2, 2025	AwardD (derivative)	18,328	6.82 USD	$125K	Unusual size	SEC
Mativ Holdings, Inc.Listing on record	Jul 2, 2025	AwardD (derivative)	615	5.55 USD	$3.4K		SEC
Mativ Holdings, Inc.Listing on record	Jun 2, 2025	Buy	5,000	5.84 USD	$29.2K	conv 50Cluster	SEC
Mativ Holdings, Inc.Listing on record	Apr 3, 2025	AwardD (derivative)	5,008	6.24 USD	$31.2K		SEC
Mativ Holdings, Inc.Listing on record	Apr 3, 2025	AwardD (derivative)	438	6.07 USD	$2.7K		SEC
Mativ Holdings, Inc.Listing on record	Apr 3, 2025	AwardD (derivative)	2,103	6.24 USD	$13.1K		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 6, 2025	AwardD (derivative)	5,832	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 4, 2025	ExerciseD (derivative)	-6,157	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Axalta Coating Systems Ltd.Listing on record	Mar 4, 2025	Exercise	6,157	—	n/a (No price was disclosed in the filing)		SEC
Mativ Holdings, Inc.Listing on record	Jan 7, 2025	AwardD (derivative)	1,060	10.90 USD	$11.6K		SEC
Mativ Holdings, Inc.Listing on record	Jan 7, 2025	AwardD (derivative)	2,866	10.90 USD	$31.2K		SEC
Mativ Holdings, Inc.Listing on record	Jan 7, 2025	AwardD (derivative)	171	13.15 USD	$2.2K		SEC
Mativ Holdings, Inc.Listing on record	Nov 15, 2024	Buy	2,500	12.45 USD	$31.1K	conv 41First in 12mo	SEC