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Amentum (AMTM) CFO logs RSU vesting and 4,097-share tax withholding move

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Amentum Holdings, Inc. Chief Financial Officer Travis Barton Johnson reported equity compensation activity in the company’s common stock. On May 6, 2026, restricted stock units representing 13,609 shares of AMTM common stock vested and were delivered. In connection with this vesting, 4,097 shares were tendered to cover tax withholding obligations, a non-market disposition. Following these transactions, Johnson directly holds 118,187 shares of Amentum common stock.

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Insider Johnson Travis Barton
Role Chief Financial Officer
Type Security Shares Price Value
Exercise Restricted Stock Units 13,609 $0.00 --
Exercise Common Stock 13,609 $0.00 --
Tax Withholding Common Stock 4,097 $24.89 $102K
Holdings After Transaction: Restricted Stock Units — 13,609 shares (Direct, null); Common Stock — 122,284 shares (Direct, null)
Footnotes (1)
  1. Represents a distribution of AMTM common stock upon vesting of restricted stock units. Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units. Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. One-half of the restricted stock units shall vest and be delivered on the 18th month and three-year anniversaries of the date of grant.
RSUs vested 13,609 shares Restricted stock units converting to AMTM common stock on May 6, 2026
Shares for tax withholding 4,097 shares at $24.89 Shares tendered to cover tax liability upon RSU vesting
Post-transaction holdings 118,187 shares CFO’s direct AMTM common stock ownership after transactions
Exercise/vested price $0.00 per share Conversion price for restricted stock units into common stock
Tax withholding value $101,963 4,097 shares multiplied by $24.89 per share
Restricted Stock Units financial
"Represents a distribution of AMTM common stock upon vesting of restricted stock units."
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
tax withholding financial
"Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units."
Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.
contingent right financial
"Each restricted stock unit represents a contingent right to receive one share of AMTM common stock."
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Johnson Travis Barton
(Last)(First)(Middle)
C/O AMENTUM HOLDINGS, INC.
4800 WESTFIELDS BOULEVARD, SUITE 400
(Street)
CHANTILLY VIRGINIA 20151
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Amentum Holdings, Inc. [ AMTM ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Financial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/06/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock05/06/2026M13,609A(1)122,284D
Common Stock05/06/2026F4,097(2)D$24.89118,187D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(3)05/06/2026M13,609 (4) (4)Common Stock13,609$013,609D
Explanation of Responses:
1. Represents a distribution of AMTM common stock upon vesting of restricted stock units.
2. Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.
3. Each restricted stock unit represents a contingent right to receive one share of AMTM common stock.
4. One-half of the restricted stock units shall vest and be delivered on the 18th month and three-year anniversaries of the date of grant.
Remarks:
/s/ Indira Lall, Attorney-in-fact05/07/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Amentum (AMTM) report for CFO Travis Barton Johnson?

Amentum’s CFO Travis Barton Johnson reported vesting of 13,609 restricted stock units into common shares and a related tax-withholding disposition of 4,097 shares on May 6, 2026, reflecting routine equity compensation activity rather than open-market trading.

How many Amentum (AMTM) shares did the CFO receive from vested restricted stock units?

The CFO received 13,609 shares of AMTM common stock upon vesting of restricted stock units. Each unit represented a contingent right to one share of common stock, which was delivered when the vesting conditions were satisfied on May 6, 2026.

Why were 4,097 Amentum (AMTM) shares disposed of in this Form 4 filing?

The 4,097 AMTM shares were tendered solely to satisfy tax withholding obligations triggered by the RSU vesting. This “F” code disposition is a non-market event, meaning the shares were not sold in an open-market transaction to outside investors.

What are restricted stock units in the context of Amentum (AMTM) compensation?

For Amentum, each restricted stock unit (RSU) represents a contingent right to receive one share of AMTM common stock. RSUs vest over time, and vested units are then delivered as common shares according to the company’s equity award terms.

How many Amentum (AMTM) shares does the CFO hold after these transactions?

After the reported RSU vesting and tax withholding, the CFO directly holds 118,187 shares of AMTM common stock. This figure reflects his post-transaction ownership as shown in the Form 4’s non-derivative holdings column following the May 6, 2026 events.

How do Amentum (AMTM) RSUs vest for the CFO’s award?

The referenced Amentum RSU grant vests in two equal parts: one-half vests and is delivered on the 18th-month anniversary of the grant date and the remaining half vests on the three-year anniversary, aligning equity compensation with longer-term service.