Amentum Holdings, Inc.

AMTM

Exchange: NYSE
Industry: Services-Business Services, NEC
SEC CIK: 0002011286

SEC filings (opens in a new tab)

No open-market purchases or sales by Amentum Holdings, Inc. insiders were filed in the last 90 days; 464 institutions reported holding it in 13F filings for Q2 2026, worth $4.34B in total; Soros Fund Management is the only superinvestor holding it.

Q1 2025 vs. Q4 2024

How the institutions holding Amentum Holdings, Inc. changed between Q4 2024 and Q1 2025.

All holders in Q1 2025 All holders in Q4 2024

13F holders of AMTM: Q4 2024 compared with Q1 2025
Measure	Q4 2024	Of which not filed for Q1 2025	Q1 2025	Change
Holders	451	11	418	−22
Shares	165.3M	454.9K	191.7M	+26.8M (+16.3%)
Value	$3.48B	$9.79M	$3.49B	+$18.2M (+0.5%)

11 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (73)

Institutions that held Amentum Holdings, Inc. at the end of Q1 2025 but not at the end of Q4 2024.

Institutions new to AMTM in Q1 2025
Institution	Shares	Value	% of portfolio
Frontier Capital Management Co LLC	3,578,732	$65.1M	0.71%
Balyasny Asset Management LLC	1,880,887	$34.2M	0.09%
Freestone Grove Partners LP	1,164,835	$21.2M	0.22%
Ghisallo Capital Management LLC	635,569	$11.6M	1.01%
Loews Corp	572,684	$10.4M	0.08%
Davidson Kempner Capital Management LP	450,000	$8.19M	0.12%
Loomis Sayles & Co L P	435,674	$7.93M	0.01%
BW Gestao de Investimentos Ltda.	394,400	$7.18M	0.81%
Monashee Investment Management LLC	360,000	$6.55M	0.78%
Nuveen, LLC	287,801	$5.24M	0.00%
Twinbeech Capital LP	225,438	$4.10M	0.07%
Hudson Value Partners, LLC	188,283	$3.43M	1.29%
Grizzlyrock Capital, LLC	164,226	$2.99M	2.71%
Marshall Wace, LLP	147,352	$2.68M	0.00%
Eisler Capital Management Ltd.	126,889	$2.31M	0.07%
Seven Grand Managers, LLC	100,000	$1.82M	0.42%
Illinois Municipal Retirement Fund	66,507	$1.21M	0.02%
Kodai Capital Management LP	65,540	$1.19M	0.05%
Wolf Hill Capital Management, LP	63,857	$1.16M	0.11%
Two Sigma Investments, LP	54,100	$984.6K	0.00%
Engineers Gate Manager LP	53,830	$979.7K	0.02%
AWH Capital, L.P.	42,500	$773.5K	1.12%
Clear Harbor Asset Management, LLC	40,543	$737.9K	0.06%
Freestone Capital Holdings, LLC	40,027	$728.5K	0.03%
Versor Investments LP	39,400	$717.1K	0.12%
Allianz Asset Management GmbH	38,700	$704.3K	0.00%
Manufacturers Life Insurance Company, The	37,520	$682.9K	0.00%
Sig Brokerage, LP	35,052	$637.9K	0.19%
Janney Montgomery Scott LLC	33,767	$615.0K	0.00%
Wolverine Asset Management LLC	33,240	$605.0K	0.01%
ABS Direct Equity Fund LLC	32,500	$591.5K	0.79%
Cantor Fitzgerald, L. P.	31,514	$573.6K	0.02%
Gsa Capital Partners LLP	30,488	$555.0K	0.05%
Quantbot Technologies LP	28,362	$516.2K	0.02%
Carlson Capital L P	28,000	$509.6K	0.28%
Two Sigma Advisers, LP	25,500	$464.1K	0.00%
Rock Creek Group, LP	25,000	$455.0K	0.05%
Proficio Capital Partners LLC	22,977	$411.6K	0.03%
Sandia Investment Management LP	19,805	$360.5K	1.05%
Walleye Capital LLC	14,069	$256.1K	0.00%
Clear Street Markets LLC	13,062	$237.7K	0.16%
One68 Global Capital, LLC	12,000	$218.4K	0.11%
Leavell Investment Management, Inc.	11,614	$211.4K	0.01%
Prelude Capital Management, LLC	11,360	$206.8K	0.02%
Virginia Retirement Systems Et Al	10,700	$194.7K	0.00%
Lecap Asset Management Ltd	10,437	$190.0K	0.04%
Kentucky Retirement Systems	10,112	$184.0K	0.01%
Tudor Investment Corp Et Al	10,046	$182.8K	0.00%
Fortress Investment Group LLC	6,287	$114.4K	0.02%
Coldstream Capital Management Inc	1,941	$35.3K	0.00%
Quarry LP	1,670	$30.4K	0.01%
Contravisory Investment Management, Inc.	1,150	$20.9K	0.00%
Boston Private Wealth LLC	669	$12.2K	0.00%
CX Institutional	613	$11.0K	0.00%
N.E.W. Advisory Services LLC	490	$8.92K	0.00%
Rossby Financial, LCC	272	$5.96K	0.00%
Colonial Trust Advisors	302	$5.50K	0.00%
Bellevue Asset Management, LLC	186	$3.38K	0.00%
Atlantic Edge Private Wealth Management, LLC	155	$2.82K	0.00%
ORG Partners LLC	130	$2.32K	0.00%
Rakuten Securities, Inc.	70	$1.27K	0.00%
Hughes Financial Services, LLC	65	$1.16K	0.00%
NBC Securities, Inc.	70	$1.00K	0.00%
CVA Family Office, LLC	29	$528	0.00%
Rialto Wealth Management, LLC	27	$492	0.00%
Sofos Investments, Inc.	23	$419	0.00%
South State Corp.	20	$364	0.00%
Creekmur Asset Management LLC	16	$291	0.00%
Abound Wealth Management	8	$146	0.00%
Zions Bancorporation, National Association	7	$127	0.00%
Greenline Partners, LLC	7	$127	0.00%
True Wealth Design, LLC	3	$55	0.00%
Private Wealth Asset Management, LLC	2	$36	0.00%

Sold out (95)

Institutions that held Amentum Holdings, Inc. at the end of Q4 2024 and filed for Q1 2025 without it.

Institutions that sold out of AMTM in Q1 2025
Institution	Shares, Q4 2024	Value, Q4 2024
Allspring Global Investments Holdings, LLC	2,420,967	$52.4M
Wellington Management Group LLP	2,333,221	$49.1M
Mirae Asset Global ETFs Holdings Ltd.	869,596	$18.3M
Mesirow Financial Investment Management, Inc.	176,931	$3.72M
Hutchinson Capital Management	145,490	$3.06M
Point72 Asset Management, L.P.	126,382	$2.66M
Pacific Capital Partners Ltd	125,000	$2.63M
HSBC Holdings PLC	119,517	$2.53M
D. E. Shaw & Co., Inc.	119,936	$2.52M
United Capital Financial Advisers, LLC	102,313	$2.15M
Cinctive Capital Management LP	91,085	$1.92M
XTX Topco Ltd	90,065	$1.89M
AQR Capital Management LLC	84,357	$1.77M
Badgley Phelps Wealth Managers, LLC	72,233	$1.52M
Arrowstreet Capital, Limited Partnership	71,946	$1.51M
Y-Intercept (Hong Kong) Ltd	61,268	$1.29M
Algert Global LLC	56,842	$1.20M
Toroso Investments, LLC	49,457	$1.04M
Hilton Capital Management, LLC	45,849	$964.2K
Strategic Advisors LLC	45,705	$961.2K
Sumitomo Mitsui Trust Holdings, Inc.	44,085	$927.1K
A. D. Beadell Investment Counsel, Inc.	43,155	$907.0K
Standard Life Aberdeen plc	35,555	$792.9K
ProShare Advisors LLC	31,054	$653.1K
Berger Financial Group, Inc	30,158	$634.2K
Murchinson Ltd.	30,000	$630.9K
Westwood Holdings Group Inc.	28,890	$607.6K
Investment Management Corp of Ontario	28,214	$593.3K
Baker Avenue Asset Management, LP	24,740	$520.3K
Forte Capital LLC	24,234	$509.6K
Royce & Associates LP	22,500	$473.2K
Utah Retirement Systems	20,585	$432.9K
Foundations Investment Advisors, LLC	19,458	$409.2K
Squarepoint Ops LLC	18,989	$399.3K
QRG Capital Management, Inc.	18,678	$392.8K
Evergreen Capital Management LLC	18,605	$391.3K
Canada Pension Plan Investment Board	16,854	$354.4K
Mercer Global Advisors Inc	16,207	$340.8K
National Pension Service	15,555	$327.1K
Kennedy Capital Management, Inc.	15,449	$324.9K
Baird Financial Group, Inc.	14,137	$297.3K
Cannon Global Investment Management, LLC	13,500	$283.9K
Exchange Traded Concepts, LLC	13,312	$280.0K
Amundi	12,908	$277.4K
SFE Investment Counsel	12,830	$269.8K
Evercore Wealth Management, LLC	12,399	$260.8K
DRW Securities, LLC	12,311	$258.9K
Pathstone Holdings, LLC	12,128	$255.1K
Jefferies Financial Group Inc.	11,830	$248.8K
Boothbay Fund Management, LLC	11,250	$236.6K
Oppenheimer & Co Inc	10,621	$223.4K
Cetera Investment Advisers	10,591	$222.7K
Janney Capital Management LLC	10,039	$211.0K
Pekin Hardy Strauss, Inc.	9,900	$208.2K
Fifth Lane Capital, LP	9,775	$205.6K
JustInvest LLC	9,651	$203.0K
State of Wyoming	2,756	$58.0K
Point72 Asia (Singapore) Pte. Ltd.	2,748	$57.8K
Shell Asset Management Co	2,684	$56.0K
Horizon Investments, LLC	1,712	$36.0K
Harbor Capital Advisors, Inc.	1,380	$29.0K
Centerpoint Advisors, LLC	1,151	$24.0K
Federated Hermes, Inc.	949	$20.0K
R Squared Ltd	900	$18.9K
Menard Financial Group LLC	798	$16.8K
Vista Private Wealth Partners. LLC	750	$15.8K
North Star Investment Management Corp.	650	$13.7K
Natixis	578	$12.2K
Proequities, Inc.	471	$10.9K
Wingate Wealth Advisors, Inc.	434	$9.13K
Transce3nd, LLC	396	$8.33K
Hanson & Doremus Investment Management	303	$6.00K
Nelson, Van Denburg & Campbell Wealth Management Group, LLC	236	$4.96K
Longview Financial Advisors LLC	187	$3.93K
GeoWealth Management, LLC	140	$2.94K
Coppell Advisory Solutions LLC	123	$2.74K
PFG Private Wealth Management, LLC	83	$1.75K
Oarsman Capital, Inc.	61	$1.28K
Venturi Wealth Management, LLC	48	$1.01K
Sunbelt Securities, Inc.	32	$714
Bruce G. Allen Investments, LLC	30	$631
Park Place Capital Corp	15	$315
Cullen/Frost Bankers, Inc.	15	$305
Cornerstone Planning Group LLC	14	$301
Eagle Bay Advisors LLC	14	$294
Private Wealth Management Group, LLC	12	$253
Hexagon Capital Partners LLC	11	$231
SJS Investment Consulting Inc.	6	$127
St Germain D J Co Inc	6	$126
Logan Capital Management Inc	5	$105
Sierra Ocean, LLC	3	$63
DiNuzzo Private Wealth, Inc.	2	$43
First Horizon Advisors, Inc.	2	$42
TFC Financial Management	1	$22
Principia Wealth Advisory, LLC	1	$21

Not filed for Q1 2025 yet (11)

Institutions that held Amentum Holdings, Inc. at the end of Q4 2024 and haven't filed a 13F for Q1 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding AMTM in Q4 2024 that haven't filed for Q1 2025
Institution	Shares, Q4 2024	Value, Q4 2024
Nuveen Asset Management, LLC	303,885	$6.39M
Two Point Capital Management, Inc.	88,129	$2.08M
TrinityPoint Wealth, LLC	58,726	$1.24M
Hilltop National Bank	2,554	$53.7K
Global Retirement Partners, LLC	1,370	$28.8K
AlphaMark Advisors, LLC	125	$3.00K
Householder Group Estate & Retirement Specialist, LLC	113	$2.00K
Financial Gravity Companies, Inc.	23	$484
WR Wealth Planners, LLC	11	$231
Zions Bancorporation, N.A.	7	$147
Cassady Schiller Wealth Management, LLC	5	$105