AMTMNYSE

Amentum Holdings, Inc.

Alert me on AMTM

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

No purchase or sale on this ticker by a member of Congress or an insider yet.

Filings for AMTM

42 held · newest 542 held · newest 2

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Signal history

No signal for this ticker yet. A signal is written when insider buying here scores one dot or more.

Stakes

Jun 30, 2026 Schedule 13G

PRIMECAP MANAGEMENT CO/CA/: 5%, 12,285,504 shares

Apr 30, 2026 Schedule 13G, amended

Invesco Ltd.: 10.1%, 24,529,939 shares

Mar 13, 2026 Schedule 13G, amended

The Vanguard Group: 0%, 0 shares

Sep 30, 2025 Schedule 13G, amended

Invesco Ltd.: 9.1%, 22,116,835 shares

Schedule 13D is filed within 5 business days of crossing 5 percent by an investor who may seek to influence the company. Schedule 13G is filed by a passive holder, and a large institution has up to 45 days after the quarter end.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

Sep 21, 2026 National Aeronautics and Space Administration $12.6M CENTER MAINTENANCE, OPERATION AND ENGINEERING II (CMOE-II) SUPPORT SERVICES.

Sep 18, 2026 National Aeronautics and Space Administration $36.9M CENTER MAINTENANCE, OPERATION AND ENGINEERING II (CMOE-II) SUPPORT SERVICES.

Sep 17, 2026 Department of State $18.2M COLOMBIAN NATIONAL POLICE (CNP) AVIATION (ARAVI) SUPPORT SERVICES.

Sep 14, 2026 Federal Bureau of Investigation $11.5M BACKGROUND INVESTIGATION SERVICES

Aug 19, 2026 Federal Emergency Management Agency $16.6M TO ADD FUNDING IN THE AMOUNT OF $16,617,676.50.

Jul 16, 2026 Federal Aviation Administration $15.2M PERFORM THE NON-TIME CRITICAL REMOVAL ACTION TO ADDRESS A SOURCE AREA AT THE FAA WILLIAM J HUGHES TECHNICAL CENTER SUPERFUND AREA 41 (AVGAS FUEL FARM AND PHOTO LAB) UNDERGROUND STORAGE TANK (UST) AREA

Jul 9, 2026 Department of the Navy $15M OPTION YEAR 5 FIXED PRICE FUNDING RECURRING SERVICES CLIN 0015

Jun 15, 2026 Defense Logistics Agency $21M SERVICES TO PERFORM WAREHOUSING AND DISTRIBUTION OPERATIONS, SCHEDULED AND UNSCHEDULED EQUIPMENT MAINTENANCE

Apr 30, 2026 Department of the Air Force $10.7M IRAQ T-6A SUSTAINMENT

Apr 8, 2026 Departmental Offices $37.4M THIS TASK ORDER IS ISSUED TO PROVIDE LAW ENFORCEMENT AND SEIZURE SERVICES TO THE TREASURY EXECUTIVE OFFICE OF ASSET FORFEITURE. THIS IS THE BASE LEVEL TASK ORDER FOR ORDERING PERIOD 3 UNDER THE SUBJECT IDIQ CONTRACT.

Show all 24

Mar 24, 2026 Department of the Air Force $25.5M LAUNCH AND RANGE SUPPORT SERVICES VIA THE SPACE FORCE RANGE CONTRACT FA2521-25-D-0006.

Mar 12, 2026 Department of the Army $44.3M REFER TO THE ATTACHMENTS ISSUED UNDER SOLICITATION NO. W912UM25RA003. UNLESS THIS TASK ORDER STATES OTHERWISE, ALL CLAUSES AND PROVISIONS OF THE BASE CONTRACT APPLY TO THE PERFORMANCE OF THE WORK SPECIFIED IN THE PWS.

Mar 12, 2026 U.S. Immigration and Customs Enforcement $453M THE PURPOSE OF THIS CONTRACT IS TO PROVIDE DETENTION, TRANSPORTATION AND MEDICAL SERVICES AT THE CAMP EAST MONTANA TEMPORARY DETENTION CENTER IN EL PASO, TX.

Jan 30, 2026 Department of the Navy $18.3M MBOS OY7 RECURRING FUNDS TASK ORDER

Jan 16, 2026 Department of the Air Force $22.4M REMOTELY PILOTED AIRCRAFT ORGANIZATIONAL-LEVEL MAINTENANCE SUPPORT FOR THE MQ-9 REAPER WEAPONS SYSTEMS AT OUTSIDE CONTIGUOUS UNITED STATES LOCATION DP-75.

Jan 13, 2026 Defense Logistics Agency $43.8M TASK ORDER FOR SUPPORT OF WAREHOUSING AND STORAGE AT VARIOUS LOCATIONS

Jan 8, 2026 Departmental Offices $18.2M THIS TASK ORDER IS ISSUED TO PROVIDE LAW ENFORCEMENT AND SEIZURE SERVICES TO THE TREASURY EXECUTIVE OFFICE OF ASSET FORFEITURE. THIS IS THE BASE LEVEL TASK ORDER

Dec 19, 2025 Department of the Air Force $19.6M REMOTELY PILOTED AIRCRAFT ORGANIZATIONAL-LEVEL MAINTENANCE SUPPORT FOR THE MQ-9 REAPER WEAPONS SYSTEMS AT OUTSIDE CONTIGUOUS UNITED STATES LOCATION DP-44.

Dec 17, 2025 Department of the Army $43.3M AWARD OF ORDERING PERIOD 5 TASK ORDER FOR THE OPERATION AND MAINTENANCE OF HAWTHORNE ARMY DEPOT

Nov 26, 2025 Department of the Air Force $10.8M THIS CONTRACT IS FOR NON-PERSONAL SERVICES TO PROVIDE SUPPORT FOR OPERATIONS, MAINTENANCE, SUSTAINMENT, AND INTEGRATION OF SERVICES OF ALL SYSTEMS/ACTIVITIES REQUIRED FOR MISSION OPERATIONS AT THE WESTERN RANGE.

Nov 26, 2025 Department of the Air Force $39.4M SUPPORT FOR OPERATIONS, MAINTENANCE, SUSTAINMENT, AND INTEGRATION SERVICES OF ALL SYSTEMS/ACTIVITIES REQUIRED FOR MISSION OPERATIONS AT THE EASTERN RANGE IN ACCORDANCE WITH THE REQUIREMENTS IN THE PERFORMANCE WORK STATEMENT, ATTACHMENT 1.

Nov 25, 2025 Department of the Air Force $21.5M REMOTELY PILOTED AIRCRAFT ORGANIZATIONAL-LEVEL MAINTENANCE SUPPORT FOR THE MQ-9 REAPER WEAPONS SYSTEMS AT OUTSIDE CONTIGUOUS UNITED STATES LOCATION DP-58.

Nov 24, 2025 Department of the Air Force $21.1M SPACE FORCE RANGE CONTRACT (SFRC) ENTERPRISE PROGRAM MANAGEMENT IN ACCORDANCE WITH THE REQUIREMENTS IN THE PERFORMANCE WORK STATEMENT, ATTACHMENT 1.

Nov 20, 2025 National Aeronautics and Space Administration $21.7M KENNEDY PROPELLANT AND LIFE SUPPORT SERVICES (KPLSS) II FY26 CUSTOMER FUNDING.

24 awards, $998M in the last 12 monthsOriginal awards ↗

Lobbying

Last four quarters

$100KQ4 2025

$90KQ1 2026

$90KQ2 2026

$90KQ3 2026

Unchanged from Q2 2026. Reported by the company to the Senate each quarter.Original report ↗

Read from LDA.gov between Sep 23, 2026 and Oct 21, 2026. Senate Office of Public Records cannot vouch for the data or analyses derived from these data after the data have been retrieved from LDA.gov.