Welcome to our dedicated page for Amentum Holdings SEC filings (Ticker: AMTM), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Amentum Holdings, Inc. filings document regulatory reporting for an advanced engineering and technology solutions company serving government, international and commercial customers. The company’s Form 8-K filings report results of operations and financial condition, earnings releases, conference-call materials, material agreements and capital-structure changes, including senior secured term loan and revolving credit facility disclosures involving Amentum Services and Amentum Technology.
Proxy and annual meeting filings describe board elections, auditor ratification, executive compensation votes and related governance procedures. The filing record also documents shareholder voting results, risk and forward-looking statement language, and formal disclosure controls around Amentum’s public-company reporting obligations.
Amentum Holdings, Inc. Chief Technology Officer Jill L. Bruning reported a disposition of common stock through a bona fide gift. On the reported date, she transferred 30,000 shares of Common Stock at a stated price of $0.0000 per share, described as a gift transfer. After this transaction, she held 190,999 shares of Common Stock in direct ownership.
Amentum Holdings, Inc. Chief Operating Officer Stephen A. Arnette reported equity award activity involving restricted stock units and common shares. On March 2, 2026, 2,808 restricted stock units were converted into 2,808 shares of AMTM common stock at a stated price of $0.00 per share upon vesting.
In connection with this vesting, 750 shares of AMTM common stock were tendered at $30.70 per share for tax withholding, a non-open-market, tax-related disposition. After these transactions, Arnette directly held 96,357 shares of AMTM common stock.
Amentum Holdings, Inc. Chief Legal Officer & GC Michele T. St. Mary reported equity award activity tied to restricted stock units on February 17, 2026. 7,080 restricted stock units vested and converted into the same number of common shares, and 2,308 common shares were withheld to cover taxes. Following these transactions, she directly owned 27,043 shares of common stock and 14,162 restricted stock units.
Amentum Holdings director Susan Leslie Ireland reported a stock grant from the company. On February 6, 2026, she acquired 5,062 shares of common stock at a stated price of $0, bringing her directly held beneficial ownership to 8,509 shares.
According to the footnote, these shares represent restricted stock units that will vest on the date of Amentum’s next annual meeting of stockholders, tying the award to continued board service until that meeting.
Amentum Holdings director Sandra E. Rowland reported stock awards tied to restricted stock units. On February 6, 2026, 11,564 restricted stock units converted into the same number of common shares at $0 per share as they vested. She also received a new grant of 5,062 common shares, also at $0 per share, which are described as restricted stock units that vest on the date of the issuer’s next annual stockholder meeting. After these transactions, she directly owned 20,073 shares of Amentum Holdings common stock.
Amentum Holdings director Brooks Vincent K reported stock-based compensation activity. On February 6, 2026, 11,564 restricted stock units converted into the same number of Amentum common shares at $0 per share upon vesting. A separate award of 5,062 common shares at $0 was also acquired as equity compensation. Following these transactions, Brooks directly owned 27,462 shares of Amentum common stock, reflecting routine director compensation rather than an open‑market purchase or sale.
Amentum Holdings, Inc. director Ralph E. Eberhart reported equity awards and vesting activity dated February 6, 2026. Restricted stock units representing 11,564 shares of AMTM common stock vested and were distributed at a price of $0 per share, leaving no restricted stock units outstanding.
On the same date, he acquired an additional 5,062 shares of common stock at $0, tied to restricted stock units that will vest on the date of the next annual meeting of stockholders. Following these transactions, he directly owned 48,120 shares of AMTM common stock.
Amentum Holdings, Inc. reports updated insider holdings for a director and executive chair on an amended Form 4. The insider is shown as beneficially owning 837,668 shares of Amentum common stock directly and 23,550 shares indirectly through a spouse. A footnote explains that the amounts reflect a non-reportable transfer arising from a pro-rata in-kind distribution of shares by Jacobs Solutions Inc. to its shareholders for no consideration on May 30, 2025, rather than an open-market trade or other purchase or sale.
Amentum Holdings director Barbara Loughran received an equity grant from the company. On 02/06/2026 she acquired 5,062 shares of common stock at a price of $0, increasing her beneficial ownership to 9,662 shares held directly. The grant is in the form of restricted stock units that will vest on the date of Amentum’s next annual meeting of stockholders, aligning a portion of her compensation with the company’s future performance and share value.
Amentum Holdings, Inc. director Christopher M.T. Thompson reported an equity award tied to the company’s common stock. On 02/06/2026, he acquired 5,062 shares of common stock at a price of $0, reflecting a grant of restricted stock units that will vest on the date of the next annual meeting of stockholders.
After the award, Thompson directly beneficially owns 5,062 common shares. The filing also notes indirect beneficial ownership of 14,000 common shares held by his spouse and 10,000 common shares held by a trust.