Stephen A. Arnette
CIK: 0001919492
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 (43 total)
- May 6, 2026AMTM
Amentum Holdings, Inc.
Exercise(M)Direct13.6K shares- - May 6, 2026AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct3.3K shares at avg. $24.89$82K - Mar 2, 2026AMTM
Amentum Holdings, Inc.
Exercise(M)Direct2.8K shares- - Mar 2, 2026AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct750 shares at avg. $30.70$23K - Nov 17, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct287 shares at avg. $21.49$6K - Nov 17, 2025AMTM
Amentum Holdings, Inc.
Award(A)Direct46.8K shares- - Nov 17, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct1.2K shares- - Nov 16, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct3.7K shares- - Nov 16, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct897 shares at avg. $22.07$20K - Nov 16, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct4.6K shares- - Nov 16, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct1.1K shares at avg. $22.07$25K - Nov 16, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct5.1K shares- - Nov 16, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct1.2K shares at avg. $22.07$27K - Nov 15, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct5.8K shares- - Nov 15, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct1.4K shares at avg. $22.07$31K - Nov 6, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct12.7K shares- - Nov 6, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct3.1K shares at avg. $21.79$67K - Mar 4, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct521 shares- - Mar 4, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct152 shares at avg. $18.71$3K - Mar 3, 2025AMTM
Amentum Holdings, Inc.
Tax Payment(F)Direct365 shares at avg. $19.64$7K - Mar 3, 2025AMTM
Amentum Holdings, Inc.
Exercise(M)Direct1.2K shares- - Nov 6, 2024AMTM
Amentum Holdings, Inc.
Award(A)DirectRestricted Stock Units
38.1K shares- - Nov 6, 2024AMTM
Amentum Holdings, Inc.
Award(A)DirectRestricted Stock Units
27.2K shares- - Oct 2, 2024AMTM
Amentum Holdings, Inc.
Award(A)DirectRestricted Stock Units
521 shares- - Oct 2, 2024AMTM
Amentum Holdings, Inc.
Award(A)DirectRestricted Stock Units
4K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 6, 2026 |  AMTM Amentum Holdings, Inc. | Exercise(M) | 13,609 | - | $0 | Direct |
| May 6, 2026 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 3,314 | $24.89 | $82,485 | Direct |
| Mar 2, 2026 | AMTM Amentum Holdings, Inc. | Exercise(M) | 2,808 | - | $0 | Direct |
| Mar 2, 2026 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 750 | $30.70 | $23,025 | Direct |
| Nov 17, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 287 | $21.49 | $6,168 | Direct |
| Nov 17, 2025 | AMTM Amentum Holdings, Inc. | Award(A) | 46,769 | - | - | Direct |
| Nov 17, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 1,178 | - | - | Direct |
| Nov 16, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 3,681 | - | - | Direct |
| Nov 16, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 897 | $22.07 | $19,797 | Direct |
| Nov 16, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 4,596 | - | - | Direct |
| Nov 16, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 1,120 | $22.07 | $24,718 | Direct |
| Nov 16, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 5,053 | - | - | Direct |
| Nov 16, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 1,231 | $22.07 | $27,168 | Direct |
| Nov 15, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 5,758 | - | - | Direct |
| Nov 15, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 1,403 | $22.07 | $30,964 | Direct |
| Nov 6, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 12,701 | - | - | Direct |
| Nov 6, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 3,093 | $21.79 | $67,396 | Direct |
| Mar 4, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 521 | - | - | Direct |
| Mar 4, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 152 | $18.71 | $2,844 | Direct |
| Mar 3, 2025 | AMTM Amentum Holdings, Inc. | Tax Payment(F) | 365 | $19.64 | $7,169 | Direct |
| Mar 3, 2025 | AMTM Amentum Holdings, Inc. | Exercise(M) | 1,230 | - | - | Direct |
| Nov 6, 2024 | AMTM Amentum Holdings, Inc. | Award(A) Restricted Stock Units | 38,105 | - | - | Direct |
| Nov 6, 2024 | AMTM Amentum Holdings, Inc. | Award(A) Restricted Stock Units | 27,218 | - | - | Direct |
| Oct 2, 2024 | AMTM Amentum Holdings, Inc. | Award(A) Restricted Stock Units | 521 | - | - | Direct |
| Oct 2, 2024 | AMTM Amentum Holdings, Inc. | Award(A) Restricted Stock Units | 4,038 | - | - | Direct |
1-25 of 43 transactions
About Arnette Stephen A
Arnette Stephen A (SEC CIK 0001919492) files insider reports with the SEC as Chief Operating Officer of Amentum Holdings, Inc. (AMTM) and EXECUTIVE VICE PRESIDENT of JACOBS SOLUTIONS INC. (J).
Signal8 holds 11 ownership filings by Arnette Stephen A (1 Form 3, 10 Form 4), filed between Sep 18, 2024 and May 7, 2026. Those filings report 43 transactions, from Sep 18, 2024 to May 6, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Arnette Stephen A's filings is in CHANTILLY, VA.
Recent filings by Arnette Stephen A
- May 6, 2026: Option exercise of AMTM shares (Form 4, code M).
- May 6, 2026: Tax withholding of AMTM shares (Form 4, code F).
- Mar 2, 2026: Option exercise of AMTM shares (Form 4, code M).
- Mar 2, 2026: Tax withholding of AMTM shares (Form 4, code F).
- Nov 17, 2025: Tax withholding of AMTM shares (Form 4, code F).
Other insiders filing for Amentum Holdings, Inc. (AMTM)
- Thompson Christopher M.T., Director
- Heller John E., Chief Executive Officer
- Mullen Sean Thomas, Chief Growth Officer
- Johnson Travis Barton, Chief Financial Officer
- Bruning Jill L, Chief Technology Officer
- St. Mary Michele T, Chief Legal Officer & GC