Stephen A. Arnette

Companies

• Amentum Holdings, Inc.Chief operating officer Oct 4, 2024 to now¹
• Jacobs Engineering GroupExecutive Vice President Apr 8, 2022 to Sep 20, 2024²
• Amentum Holdings, Inc.Board member Sep 18, 2024 to Sep 18, 2024³

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Jacobs Engineering Group J27,084 shares⁴$3.8M at $141.46Sep 18, 2024
• AAmentum Holdings, Inc. AMTM106,652 shares⁵$2.1M at $20.06May 6, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• May 6, 2026Shares withheld for tax 3,314 shares at $24.89 of Amentum Holdings, Inc.⁵
• May 6, 2026Exercised options 13,609 shares of Amentum Holdings, Inc.⁵
• Mar 2, 2026Shares withheld for tax 750 shares at $30.70 of Amentum Holdings, Inc.⁶
• Mar 2, 2026Exercised options 2,808 shares of Amentum Holdings, Inc.⁶
• Nov 17, 2025Granted 46,769 shares of Amentum Holdings, Inc.⁷
• Nov 17, 2025Shares withheld for tax 287 shares at $21.49 of Amentum Holdings, Inc.⁷
• Nov 17, 2025Exercised options 1,178 shares of Amentum Holdings, Inc.⁷
• Nov 16, 2025Shares withheld for tax 1,120 shares at $22.07 of Amentum Holdings, Inc.⁸
• Nov 16, 2025Exercised options 4,596 shares of Amentum Holdings, Inc.⁸
• Nov 16, 2025Shares withheld for tax 897 shares at $22.07 of Amentum Holdings, Inc.⁸
• Nov 16, 2025Exercised options 3,681 shares of Amentum Holdings, Inc.⁸
• Nov 16, 2025Shares withheld for tax 1,231 shares at $22.07 of Amentum Holdings, Inc.⁸
• Nov 16, 2025Exercised options 5,053 shares of Amentum Holdings, Inc.⁸
• Nov 15, 2025Shares withheld for tax 1,403 shares at $22.07 of Amentum Holdings, Inc.⁸
• Nov 15, 2025Exercised options 5,758 shares of Amentum Holdings, Inc.⁸
• Nov 6, 2025Shares withheld for tax 3,093 shares at $21.79 of Amentum Holdings, Inc.⁹
• Nov 6, 2025Exercised options 12,701 shares of Amentum Holdings, Inc.⁹
• Mar 4, 2025Shares withheld for tax 152 shares at $18.71 of Amentum Holdings, Inc.¹⁰
• Mar 4, 2025Exercised options 521 shares of Amentum Holdings, Inc.¹⁰
• Mar 3, 2025Shares withheld for tax 365 shares at $19.64 of Amentum Holdings, Inc.¹⁰
• Mar 3, 2025Exercised options 1,230 shares of Amentum Holdings, Inc.¹⁰
• Sep 18, 2024Shares withheld for tax 2,908 shares at $145.54 of Jacobs Engineering Group⁴
• Sep 18, 2024Shares withheld for tax 1,651 shares at $145.54 of Jacobs Engineering Group⁴
• Sep 18, 2024Exercised options 1,044 shares of Jacobs Engineering Group⁴
• Sep 18, 2024Exercised options 989 shares of Jacobs Engineering Group⁴