William M. Cook
CIK: 0001226577
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (26 total)
- Jul 1, 2026MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
658 shares- - Jul 1, 2026MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
19.8K shares- - Jul 1, 2026MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
968 shares- - Jul 1, 2026MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
1.1K shares- - Mar 4, 2026AXTA
Axalta Coating Systems Ltd.
Exercise(M)Direct5.8K shares- - Mar 3, 2026AXTA
Axalta Coating Systems Ltd.
Award(A)DirectRestricted Stock Units
6.3K shares- - Jan 1, 2026MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
306 shares at avg. $12.49- - Jan 1, 2026MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
793 shares at avg. $11.82- - Oct 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
1.3K shares at avg. $11.31- - Oct 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
439 shares at avg. $12.57- - Jul 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
2.1K shares at avg. $6.82- - Jul 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
18.3K shares at avg. $6.82- - Jul 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock
615 shares at avg. $5.55- - May 29, 2025MATV
Mativ Holdings, Inc.
Purchase(P)Direct5K shares at avg. $5.84$29K - Apr 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
438 shares at avg. $6.07- - Apr 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
2.1K shares at avg. $6.24- - Apr 1, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
5K shares at avg. $6.24- - Mar 4, 2025AXTA
Axalta Coating Systems Ltd.
Award(A)DirectRestricted Stock Units
5.8K shares- - Feb 28, 2025AXTA
Axalta Coating Systems Ltd.
Exercise(M)Direct6.2K shares- - Jan 3, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
1.1K shares at avg. $10.90- - Jan 3, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
2.9K shares at avg. $10.90- - Jan 3, 2025MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
171 shares at avg. $13.15- - Nov 15, 2024MATV
Mativ Holdings, Inc.
Purchase(P)Direct2.5K shares at avg. $12.45$31K - Oct 1, 2024MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
102 shares at avg. $18.56- - Oct 1, 2024MATV
Mativ Holdings, Inc.
Award(A)DirectPhantom Stock Units
1.6K shares at avg. $16.99-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jul 1, 2026 |  MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 658 | - | - | Direct |
| Jul 1, 2026 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 19,815 | - | - | Direct |
| Jul 1, 2026 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 968 | - | - | Direct |
| Jul 1, 2026 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 1,075 | - | - | Direct |
| Mar 4, 2026 |  AXTA Axalta Coating Systems Ltd. | Exercise(M) | 5,832 | - | $0 | Direct |
| Mar 3, 2026 | AXTA Axalta Coating Systems Ltd. | Award(A) Restricted Stock Units | 6,313 | - | - | Direct |
| Jan 1, 2026 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 306 | $12.49 | - | Direct |
| Jan 1, 2026 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 793 | $11.82 | - | Direct |
| Oct 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 1,271 | $11.31 | - | Direct |
| Oct 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 439 | $12.57 | - | Direct |
| Jul 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 2,108 | $6.82 | - | Direct |
| Jul 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 18,328 | $6.82 | - | Direct |
| Jul 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock | 615 | $5.55 | - | Direct |
| May 29, 2025 | MATV Mativ Holdings, Inc. | Purchase(P) | 5,000 | $5.84 | $29,200 | Direct |
| Apr 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 438 | $6.07 | - | Direct |
| Apr 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 2,103 | $6.24 | - | Direct |
| Apr 1, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 5,008 | $6.24 | - | Direct |
| Mar 4, 2025 | AXTA Axalta Coating Systems Ltd. | Award(A) Restricted Stock Units | 5,832 | - | - | Direct |
| Feb 28, 2025 | AXTA Axalta Coating Systems Ltd. | Exercise(M) | 6,157 | - | - | Direct |
| Jan 3, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 1,060 | $10.90 | - | Direct |
| Jan 3, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 2,866 | $10.90 | - | Direct |
| Jan 3, 2025 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 171 | $13.15 | - | Direct |
| Nov 15, 2024 | MATV Mativ Holdings, Inc. | Purchase(P) | 2,500 | $12.45 | $31,125 | Direct |
| Oct 1, 2024 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 102 | $18.56 | - | Direct |
| Oct 1, 2024 | MATV Mativ Holdings, Inc. | Award(A) Phantom Stock Units | 1,617 | $16.99 | - | Direct |
1-25 of 26 transactions
About COOK WILLIAM M
COOK WILLIAM M (SEC CIK 0001226577) files insider reports with the SEC as Director of Mativ Holdings, Inc. (MATV) and Director of Axalta Coating Systems Ltd. (AXTA).
Signal8 holds 12 ownership filings by COOK WILLIAM M, all Form 4s, filed between Oct 3, 2024 and Jul 6, 2026. Those filings report 26 transactions, from Oct 1, 2024 to Jul 1, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on COOK WILLIAM M's filings is in ALPHARETTA, GA.
Recent filings by COOK WILLIAM M
- Jul 1, 2026: Grants or awards of MATV derivative securities (4 lines, Form 4, code A).
- Mar 4, 2026: Option exercise of AXTA shares (Form 4, code M).
- Mar 3, 2026: Grant or award of AXTA derivative securities (Form 4, code A).
- Jan 1, 2026: Grants or awards of MATV derivative securities (2 lines, Form 4, code A).
- Oct 1, 2025: Grants or awards of MATV derivative securities (2 lines, Form 4, code A).
Other insiders filing for Mativ Holdings, Inc. (MATV)
- JOHNSON MARK W, CLO and Corporate Secretary
- Levi Marco, Director
- Ritrievi Kimberly E, Director
- Hausmann Bruce Andrew, Director
- Borg Deborah, Director
- Stipancich John K, Director