Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Amentum Holdings, Inc.

CIK 0002011286AMTM· quarter ending 2026-06-30

Shares outstanding

244,506,413

as of 2026-08-07 · 10-Q cover page, filed 2026-08-11

Held by 13F filers

219,117,499

89.6% of shares outstanding

Holders

464

-22 vs 2026-03-31 · 59 new, 81 exited

Value

$4.3B

shares +3.8% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-11, as of 2026-08-07)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	AMTM · NYSE	244,506,413	219,117,499	89.6%	464	023939101

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	023939101	COM	464	219,117,499	244,506,413	89.6%	$4.3B	12 call / 9 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (250 of 464 · 023939101)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	AMERICAN SECURITIES LLC	45,026,743	18.42%	$930.7M	—
2	Invesco Ltd.	24,954,251	10.21%	$515.8M	+3,480,473 (+16.2%)
3	BlackRock, Inc.	17,906,984	7.32%	$370.1M	+65,701 (+0.4%)
4	PRIMECAP MANAGEMENT CO/CA/	12,285,504	5.02%	$253.9M	+200,210 (+1.7%)
5	Legacy Advisors, LLC	9,065,677	3.71%	$9.1M	+1,399 (+0.0%)
6	VANGUARD PORTFOLIO MANAGEMENT LLC	7,948,385	3.25%	$164.3M	+95,434 (+1.2%)
7	VANGUARD CAPITAL MANAGEMENT LLC	6,711,987	2.75%	$138.7M	+61,108 (+0.9%)
8	FMR LLC	5,679,175	2.32%	$117.4M	+100,789 (+1.8%)
9	DIMENSIONAL FUND ADVISORS LP	5,537,696	2.26%	$114.5M	+1,750,276 (+46.2%)
10	STATE STREET CORP	5,151,772	2.11%	$106.5M	+72,731 (+1.4%)
11	FRONTIER CAPITAL MANAGEMENT CO LLC	4,143,971	1.69%	$85.7M	-786,239 (-15.9%)
12	Troluce Capital Advisors LLC	3,565,399	1.46%	$73.7M	+2,565,399 (+256.5%)
13	GEODE CAPITAL MANAGEMENT, LLC	2,716,560	1.11%	$56.2M	-97,855 (-3.5%)
14	GOLDMAN SACHS GROUP INC	2,711,866	1.11%	$56.1M	+1,580,428 (+139.7%)
15	MORGAN STANLEY	2,662,329	1.09%	$55.0M	+427,416 (+19.1%)
16	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	2,318,581	0.95%	$47.9M	-466,553 (-16.8%)
17	THOMPSON SIEGEL & WALMSLEY LLC	2,281,945	0.93%	$47.2M	+756,061 (+49.5%)
18	MILLENNIUM MANAGEMENT LLC	2,127,779	0.87%	$44.0M	+1,496,724 (+237.2%)
19	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	2,120,102	0.87%	$43.8M	+52,172 (+2.5%)
20	Thrivent Financial for Lutherans	2,105,802	0.86%	$43.5M	+5,345 (+0.3%)
21	BANK OF AMERICA CORP /DE/	2,042,897	0.84%	$42.2M	-362,144 (-15.1%)
22	SEGRA CAPITAL MANAGEMENT, LLC	2,037,890	0.83%	$42.1M	+425,164 (+26.4%)
23	Verition Fund Management LLC	2,019,334	0.83%	$41.7M	+721,388 (+55.6%)
24	VAN ECK ASSOCIATES CORP	1,988,898	0.81%	$41.1M	+1,441,254 (+263.2%)
25	VOYA INVESTMENT MANAGEMENT LLC	1,974,191	0.81%	$40.8M	+774,700 (+64.6%)
26	UBS Group AG	1,545,183	0.63%	$31.9M	-165,592 (-9.7%)
27	NORGES BANK	1,516,193	0.62%	$31.3M	NEW
28	Permian Investment Partners, LP	1,433,028	0.59%	$29.6M	-133,972 (-8.5%)
29	683 Capital Management, LLC	1,100,000	0.45%	$22.7M	+325,000 (+41.9%)
30	LOOMIS SAYLES & CO L P	1,042,522	0.43%	$21.5M	-38,814 (-3.6%)
31	Qube Research & Technologies Ltd	1,034,395	0.42%	$21.4M	+957,026 (+1237.0%)
32	NORTHERN TRUST CORP	1,029,892	0.42%	$21.3M	+45,787 (+4.7%)
33	VANGUARD FIDUCIARY TRUST CO	968,451	0.40%	$20.0M	+20,991 (+2.2%)
34	CACTI ASSET MANAGEMENT LLC	881,692	0.36%	$18.2M	—
35	Bank of New York Mellon Corp	878,084	0.36%	$18.2M	-30,515 (-3.4%)
36	Russell Investments Group, Ltd.	840,642	0.34%	$17.4M	+126,814 (+17.8%)
37	AVENIR CORP	811,726	0.33%	$16.8M	-29,373 (-3.5%)
38	WELLS FARGO & COMPANY/MN	750,214	0.31%	$15.5M	+113,540 (+17.8%)
39	PRINCIPAL FINANCIAL GROUP INC	742,381	0.30%	$15.3M	-2,347 (-0.3%)
40	Ancora Advisors LLC	715,652	0.29%	$14.8M	+12,533 (+1.8%)
41	ROYCE & ASSOCIATES LP	697,368	0.29%	$14.4M	+147,590 (+26.8%)
42	HRT FINANCIAL LP	671,847	0.27%	$13.9M	NEW
43	CITADEL ADVISORS LLC	670,684	0.27%	$13.9M	+590,046 (+731.7%)
44	Point72 Asset Management, L.P.	649,984	0.27%	$13.4M	-980,579 (-60.1%)
45	AQR CAPITAL MANAGEMENT LLC	601,900	0.25%	$12.4M	+94,057 (+18.5%)
46	FIRST TRUST ADVISORS LP	547,907	0.22%	$11.3M	+319,824 (+140.2%)
47	Ruane, Cunniff & Goldfarb L.P.	537,213	0.22%	$11.1M	-1,085,769 (-66.9%)
48	Public Sector Pension Investment Board	528,821	0.22%	$10.9M	-20,976 (-3.8%)
49	Loews Corp	500,000	0.20%	$10.3M	NEW
50	FIRST NATIONAL BANK OF OMAHA	475,992	0.19%	$9.7M	+227,988 (+91.9%)
51	SHAPIRO CAPITAL MANAGEMENT LLC	475,970	0.19%	$9.8M	NEW
52	AWH Capital, L.P.	470,500	0.19%	$9.7M	+235,250 (+100.0%)
53	Nuveen, LLC	421,495	0.17%	$8.7M	-450,300 (-51.7%)
54	Arvin Capital Management LP	416,705	0.17%	$8.6M	-1,654,495 (-79.9%)
55	HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC	402,130	0.16%	$8.3M	+68,330 (+20.5%)
56	SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC	394,370	0.16%	$8.2M	+176,590 (+81.1%)
57	BOOTHBAY FUND MANAGEMENT, LLC	387,973	0.16%	$8.0M	+301,781 (+350.1%)
58	De Lisle Partners LLP	374,818	0.15%	$7.7M	-5,000 (-1.3%)
59	Vident Advisory, LLC	372,918	0.15%	$7.7M	-15,944 (-4.1%)
60	Mawer Investment Management Ltd.	369,557	0.15%	$7.6M	+35,767 (+10.7%)
61	MOORE CAPITAL MANAGEMENT, LP	365,096	0.15%	$7.5M	-508,514 (-58.2%)
62	Legal & General Group Plc	349,048	0.14%	$7.2M	+14,152 (+4.2%)
63	JANE STREET GROUP, LLC	343,687	0.14%	$7.1M	+151,708 (+79.0%)
64	SUSQUEHANNA INTERNATIONAL GROUP, LLP	332,452	0.14%	$6.9M	+2,403 (+0.7%)
65	CenterBook Partners LP	328,766	0.13%	$6.8M	+185,068 (+128.8%)
66	AMERIPRISE FINANCIAL INC	319,479	0.13%	$6.6M	-10,266 (-3.1%)
67	GRIZZLYROCK CAPITAL, LLC	318,363	0.13%	$6.6M	+29,250 (+10.1%)
68	Swiss National Bank	318,091	0.13%	$6.6M	+4,700 (+1.5%)
69	Rovida Investment Management Ltd	315,000	0.13%	$6.5M	—
70	Aristotle Capital Boston, LLC	307,836	0.13%	$6.4M	-37,140 (-10.8%)
71	EXCHANGE TRADED CONCEPTS, LLC	305,286	0.12%	$6.3M	+10,278 (+3.5%)
72	TWO SIGMA INVESTMENTS, LP	284,268	0.12%	$5.9M	-615,909 (-68.4%)
73	RHUMBLINE ADVISERS	284,060	0.12%	$5.9M	-16,233 (-5.4%)
74	FIFTH THIRD BANCORP	281,815	0.12%	$5.8M	+8,499 (+3.1%)
75	MANUFACTURERS LIFE INSURANCE COMPANY, THE	273,618	0.11%	$1.1M	+232,701 (+568.7%)
76	California Public Employees Retirement System	266,383	0.11%	$5.5M	-10,669 (-3.9%)
77	SG Americas Securities, LLC	262,993	0.11%	$5.4M	-11,609 (-4.2%)
78	Hudson Value Partners, LLC	250,185	0.10%	$5.2M	+46,275 (+22.7%)
79	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	249,725	0.10%	$5.2M	+1,768 (+0.7%)
80	CSM Advisors, LLC	243,814	0.10%	$5.0M	+162,573 (+200.1%)
81	ExodusPoint Capital Management, LP	226,289	0.09%	$4.7M	NEW
82	RAYMOND JAMES FINANCIAL INC	224,399	0.09%	$4.6M	-21,425 (-8.7%)
83	Hel Ved Capital Management Ltd	214,000	0.09%	$4.4M	+35,500 (+19.9%)
84	D. E. Shaw & Co., Inc.	191,488	0.08%	$4.0M	+125,317 (+189.4%)
85	SEI INVESTMENTS CO	190,069	0.08%	$3.9M	-104,599 (-35.5%)
86	WEDGE CAPITAL MANAGEMENT L L P/NC	187,832	0.08%	$3.9M	+23,166 (+14.1%)
87	Verbena Value LP	186,200	0.08%	$3.8M	NEW
88	Telos Capital Management, Inc.	185,611	0.08%	$3.8M	-4,290 (-2.3%)
89	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	183,223	0.07%	$3.8M	-1,332 (-0.7%)
90	North Growth Management Ltd.	173,000	0.07%	$3.6M	+1,000 (+0.6%)
91	OpenArc Corporate Advisory, LLC	170,291	0.07%	$3.5M	-61 (-0.0%)
92	Brevan Howard Capital Management LP	167,354	0.07%	$3.5M	+90,158 (+116.8%)
93	NEW YORK STATE TEACHERS RETIREMENT SYSTEM	161,992	0.07%	$3.3M	-3,337 (-2.0%)
94	Atom Investors LP	160,876	0.07%	$3.3M	+138,061 (+605.1%)
95	Gotham Asset Management, LLC	156,113	0.06%	$3.2M	-364,928 (-70.0%)
96	PRICE T ROWE ASSOCIATES INC /MD/	152,081	0.06%	$3.1M	+6,828 (+4.7%)
97	BARCLAYS PLC	151,780	0.06%	$3.1M	+104,965 (+224.2%)
98	Soviero Asset Management, LP	150,000	0.06%	$3.1M	-90,000 (-37.5%)
99	OPPENHEIMER & CO INC	142,974	0.06%	$3.0M	-25,898 (-15.3%)
100	Bryn Mawr Trust Advisors, LLC	141,443	0.06%	$2.9M	+24,572 (+21.0%)
101	PRUDENTIAL FINANCIAL INC	139,950	0.06%	$2.9M	-480 (-0.3%)
102	Focus Partners Wealth	138,344	0.06%	$2.9M	-2,466,567 (-94.7%)
103	Vanguard Global Advisers, LLC	137,394	0.06%	$2.8M	+76,006 (+123.8%)
104	VANGUARD ASSET MANAGEMENT, Ltd	127,793	0.05%	$2.6M	—
105	BESSEMER GROUP INC	126,107	0.05%	$2.6M	+155 (+0.1%)
106	South Dakota Investment Council	121,837	0.05%	$2.5M	-1,200 (-1.0%)
107	JPMORGAN CHASE & CO	119,174	0.05%	$2.6M	+34,402 (+40.6%)
108	SOROS FUND MANAGEMENT LLC	118,276	0.05%	$2.4M	+10,670 (+9.9%)
109	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	117,135	0.05%	$2.4M	-3,730 (-3.1%)
110	ALGERT GLOBAL LLC	102,220	0.04%	$2.1M	+1,210 (+1.2%)
111	TWINBEECH CAPITAL LP	99,727	0.04%	$2.1M	NEW
112	Strategic Global Advisors, LLC	99,103	0.04%	$2.0M	+3,385 (+3.5%)
113	Quantinno Capital Management LP	99,067	0.04%	$2.0M	-46,507 (-31.9%)
114	STATE OF WISCONSIN INVESTMENT BOARD	98,425	0.04%	$2.0M	-3,558 (-3.5%)
115	GAMCO INVESTORS, INC. ET AL	97,120	0.04%	$2.0M	+1,789 (+1.9%)
116	LPL Financial LLC	96,430	0.04%	$2.0M	+7,630 (+8.6%)
117	ROYAL BANK OF CANADA	92,041	0.04%	$1.9M	-139,701 (-60.3%)
118	Mraz, Amerine & Associates, Inc.	90,200	0.04%	$1.9M	+18,215 (+25.3%)
119	Pine Valley Investments Ltd Liability Co	89,488	0.04%	$1.8M	+10,213 (+12.9%)
120	Holocene Advisors, LP	89,037	0.04%	$1.8M	-34,160 (-27.7%)
121	Illinois Municipal Retirement Fund	85,809	0.04%	$1.8M	+2,402 (+2.9%)
122	Balyasny Asset Management L.P.	85,389	0.03%	$1.8M	+67,044 (+365.5%)
123	ALLIANCEBERNSTEIN L.P.	79,944	0.03%	$2.1M	+6,138 (+8.3%)
124	Dynamic Technology Lab Private Ltd	76,540	0.03%	$1.6M	+33,295 (+77.0%)
125	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	76,516	0.03%	$1.6M	-2,642 (-3.3%)
126	GABELLI FUNDS LLC	76,283	0.03%	$1.6M	+6,500 (+9.3%)
127	OSAIC HOLDINGS, INC.	76,280	0.03%	$1.6M	+49,217 (+181.9%)
128	NEW YORK STATE COMMON RETIREMENT FUND	75,151	0.03%	$1.6M	-427,336 (-85.0%)
129	Cascade Investment Advisors, Inc.	72,340	0.03%	$1.5M	NEW
130	Police & Firemen's Retirement System of New Jersey	71,268	0.03%	$1.5M	+991 (+1.4%)
131	Jupiter Topco LLC	69,400	0.03%	$1.4M	NEW
132	Ridge Creek Global, Inc	68,418	0.03%	$1.4M	-2,130 (-3.0%)
133	Louisiana State Employees Retirement System	67,500	0.03%	$1.4M	-700 (-1.0%)
134	NATIXIS	67,073	0.03%	$1.4M	NEW
135	Treasurer of the State of North Carolina	64,959	0.03%	$1.3M	-3,200 (-4.7%)
136	Caption Management, LLC	64,000	0.03%	$1.3M	+42,278 (+194.6%)
137	State of New Jersey Common Pension Fund D	61,033	0.02%	$1.3M	-9,202 (-13.1%)
138	Kerrisdale Advisers, LLC	59,845	0.02%	$1.2M	+30,655 (+105.0%)
139	WINTON GROUP Ltd	58,393	0.02%	$1.2M	+2,893 (+5.2%)
140	FOX RUN MANAGEMENT, L.L.C.	56,706	0.02%	$1.2M	+22,767 (+67.1%)
141	DELPHI MANAGEMENT INC /MA/	55,469	0.02%	$1.1M	+17,596 (+46.5%)
142	Creative Planning	54,404	0.02%	$1.1M	-10,376 (-16.0%)
143	Advisors Asset Management, Inc.	53,517	0.02%	$1.1M	+3,489 (+7.0%)
144	State of Tennessee, Department of Treasury	53,132	0.02%	$1.1M	+6,870 (+14.9%)
145	Crestwood Advisors Group, LLC	53,002	0.02%	$1.1M	-3,815 (-6.7%)
146	XTX Topco Ltd	52,938	0.02%	$1.1M	+29,151 (+122.6%)
147	WOLVERINE ASSET MANAGEMENT LLC	51,942	0.02%	$1.1M	—
148	VICTORY CAPITAL MANAGEMENT INC	50,740	0.02%	$1.0M	+915 (+1.8%)
149	State of Alaska, Department of Revenue	50,689	0.02%	$1.0M	-25,172 (-33.2%)
150	HAHN CAPITAL MANAGEMENT LLC	49,705	0.02%	$1.0M	-1,415 (-2.8%)
151	ENVESTNET ASSET MANAGEMENT INC	49,420	0.02%	$1.0M	-12,189 (-19.8%)
152	INTECH INVESTMENT MANAGEMENT LLC	48,767	0.02%	$1.0M	NEW
153	NATIXIS ADVISORS, LLC	48,328	0.02%	$998K	-6,078 (-11.2%)
154	WEXFORD CAPITAL LP	47,870	0.02%	$989K	+12,384 (+34.9%)
155	Bridgewater Associates, LP	47,223	0.02%	$976K	+30,171 (+176.9%)
156	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	45,464	0.02%	$940K	-2,378 (-5.0%)
157	Hikari Tsushin, Inc.	45,403	0.02%	$938K	—
158	AMALGAMATED BANK	44,063	0.02%	$911K	-14,288 (-24.5%)
159	ARIZONA STATE RETIREMENT SYSTEM	43,751	0.02%	$904K	+210 (+0.5%)
160	First National Advisers, LLC	43,079	0.02%	$890K	+30,337 (+238.1%)
161	Cerity Partners LLC	42,875	0.02%	$886K	+426 (+1.0%)
162	Paragon Capital Management LLC	42,651	0.02%	$882K	-507 (-1.2%)
163	Entropy Technologies, LP	42,286	0.02%	$874K	+15,391 (+57.2%)
164	JONES FINANCIAL COMPANIES LLLP	41,502	0.02%	$840K	+3,826 (+10.2%)
165	Zurcher Kantonalbank (Zurich Cantonalbank)	40,963	0.02%	$847K	—
166	Lido Advisors, LLC	40,309	0.02%	$833K	-10,036 (-19.9%)
167	HARBOR CAPITAL ADVISORS, INC.	39,501	0.02%	$816K	NEW
168	Vanguard Investments Australia, Ltd.	39,488	0.02%	$816K	—
169	TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	37,772	0.02%	$781K	—
170	YOUSIF CAPITAL MANAGEMENT, LLC	37,746	0.02%	$780K	-106 (-0.3%)
171	COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	36,500	0.01%	$754K	-1,504 (-4.0%)
172	AXQ CAPITAL, LP	35,915	0.01%	$742K	NEW
173	Wilmington Savings Fund Society, FSB	35,425	0.01%	$732K	+6,287 (+21.6%)
174	OREGON PUBLIC EMPLOYEES RETIREMENT FUND	35,000	0.01%	$723K	-100 (-0.3%)
175	NISA INVESTMENT ADVISORS, LLC	34,922	0.01%	$722K	-1,307 (-3.6%)
176	Universal- Beteiligungs- und Servicegesellschaft mbH	33,813	0.01%	$699K	-828 (-2.4%)
177	CAPTRUST FINANCIAL ADVISORS	33,730	0.01%	$697K	+1,801 (+5.6%)
178	TOWER BRIDGE ADVISORS	33,261	0.01%	$688K	-2,437 (-6.8%)
179	Lebenthal Global Advisors, LLC	33,000	0.01%	$682K	NEW
180	Cambridge Investment Research Advisors, Inc.	32,970	0.01%	$682K	+13,741 (+71.5%)
181	Old West Investment Management, LLC	32,875	0.01%	$680K	+11,108 (+51.0%)
182	NEUBERGER BERMAN GROUP LLC	32,120	0.01%	$664K	+11,569 (+56.3%)
183	Clear Harbor Asset Management, LLC	31,780	0.01%	$657K	-1,995 (-5.9%)
184	CITIGROUP INC	31,486	0.01%	$651K	-9,185 (-22.6%)
185	MARCO INVESTMENT MANAGEMENT LLC	31,391	0.01%	$649K	NEW
186	Williams Jones Wealth Management, LLC.	31,209	0.01%	$645K	-1,306 (-4.0%)
187	DBA TRADING, LLC	31,196	0.01%	$814K	—
188	Blackstone Inc.	31,027	0.01%	$641K	NEW
189	Steadtrust LLC	30,400	0.01%	$628K	-15,000 (-33.0%)
190	Maryland State Retirement & Pension System	29,838	0.01%	$617K	—
191	Legal Advantage Investments, Inc.	28,900	0.01%	$597K	—
192	GROUP ONE TRADING LLC	27,710	0.01%	$573K	NEW
193	Corient Private Wealth LP	27,543	0.01%	$569K	-1,990 (-6.7%)
194	Jain Global LLC	27,519	0.01%	$569K	NEW
195	BLAIR WILLIAM & CO/IL	27,278	0.01%	$564K	-22,020 (-44.7%)
196	Pictet Asset Management Holding SA	26,893	0.01%	$556K	—
197	National Philanthropic Trust	26,844	0.01%	$555K	-222 (-0.8%)
198	Ameritas Advisory Services, LLC	26,747	0.01%	$553K	NEW
199	SIT INVESTMENT ASSOCIATES INC	26,202	0.01%	$542K	—
200	SECURITY NATIONAL BANK OF SO DAK	25,964	0.01%	$537K	-165 (-0.6%)
201	LEAVELL INVESTMENT MANAGEMENT, INC.	24,660	0.01%	$510K	+8,023 (+48.2%)
202	OPPENHEIMER ASSET MANAGEMENT INC.	24,597	0.01%	$508K	-3,557 (-12.6%)
203	Feynman Point Asset Management LLC	24,075	0.01%	$498K	NEW
204	Peak Asset Management, LLC	24,000	0.01%	$496K	—
205	Pathstone Holdings, LLC	23,947	0.01%	$495K	+2,153 (+9.9%)
206	SECURITY NATIONAL BANK OF SIOUX CITY IOWA /IA/	23,326	0.01%	$482K	+5,565 (+31.3%)
207	US BANCORP \DE\	22,681	0.01%	$469K	-1,596 (-6.6%)
208	DOVER ADVISORS, LLC	22,219	0.01%	$644K	+1,058 (+5.0%)
209	HSBC HOLDINGS PLC	22,218	0.01%	$460K	NEW
210	Tidal Investments LLC	22,071	0.01%	$456K	+7,741 (+54.0%)
211	DEUTSCHE BANK AG\	21,821	0.01%	$451K	+1,967 (+9.9%)
212	Grantham, Mayo, Van Otterloo & Co. LLC	21,601	0.01%	$446K	NEW
213	NEVILLE RODIE & SHAW INC	21,486	0.01%	$444K	-324 (-1.5%)
214	Gryphon Financial Partners LLC	21,057	0.01%	$435K	+2,174 (+11.5%)
215	GUIDANCE CAPITAL, INC	20,853	0.01%	$433K	+1,382 (+7.1%)
216	STEPHENS INC /AR/	20,516	0.01%	$424K	-2,879 (-12.3%)
217	BANK OF MONTREAL /CAN/	20,485	0.01%	$423K	+519 (+2.6%)
218	Summit Trail Advisors, LLC	20,229	0.01%	$418K	+6,267 (+44.9%)
219	LATHROP INVESTMENT MANAGEMENT CO	19,526	0.01%	$404K	-518 (-2.6%)
220	VIRGINIA RETIREMENT SYSTEMS ET Al	19,400	0.01%	$401K	—
221	MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC	19,129	0.01%	$395K	+1,542 (+8.8%)
222	WEATHERLY ASSET MANAGEMENT L. P.	18,650	0.01%	$385K	+8,960 (+92.5%)
223	COMMONWEALTH EQUITY SERVICES, LLC	18,240	0.01%	$377K	+760 (+4.3%)
224	HANCOCK WHITNEY CORP	18,236	0.01%	$377K	NEW
225	TOTH FINANCIAL ADVISORY CORP	18,226	0.01%	$377K	-4,129 (-18.5%)
226	ASO GROUP Ltd	17,724	0.01%	$366K	—
227	State of Wyoming	17,667	0.01%	$365K	+9,365 (+112.8%)
228	Shay Capital LLC	17,500	0.01%	$362K	NEW
229	CLIFFORD SWAN INVESTMENT COUNSEL LLC	17,495	0.01%	$362K	-1,719 (-8.9%)
230	Vanguard Personalized Indexing Management, LLC	17,111	0.01%	$354K	+621 (+3.8%)
231	CIBC Asset Management Inc	17,104	0.01%	$354K	-1,331 (-7.2%)
232	SIMPLEX TRADING, LLC	17,003	0.01%	$351K	NEW
233	Machina Capital S.A.S.	16,681	0.01%	$345K	+8,399 (+101.4%)
234	Elo Mutual Pension Insurance Co	16,030	0.01%	$331K	NEW
235	TEACHER RETIREMENT SYSTEM OF TEXAS	15,882	0.01%	$328K	+6,150 (+63.2%)
236	Sanctuary Advisors, LLC	15,732	0.01%	$325K	NEW
237	Heritage Wealth Advisors	15,532	0.01%	$321K	-817 (-5.0%)
238	TRUIST FINANCIAL CORP	15,323	0.01%	$317K	-1,067 (-6.5%)
239	Caitong International Asset Management Co., Ltd	15,239	0.01%	$315K	+12,302 (+418.9%)
240	Moran Wealth Management, LLC	15,076	0.01%	$312K	-4,509 (-23.0%)
241	FIRST MANHATTAN CO. LLC.	14,242	0.01%	$294K	+125 (+0.9%)
242	HighTower Advisors, LLC	14,108	0.01%	$292K	-4,505 (-24.2%)
243	Walleye Capital LLC	13,836	0.01%	$286K	+10,009 (+261.5%)
244	FRANKLIN RESOURCES INC	13,587	0.01%	$281K	+1,740 (+14.7%)
245	PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO	13,525	0.01%	$280K	—
246	Intrinsic Value Partners, LLC	13,399	0.01%	$277K	-500 (-3.6%)
247	Sterling Capital Management LLC	13,388	0.01%	$277K	-1,020 (-7.1%)
248	Granite Investment Partners, LLC	13,248	0.01%	$274K	—
249	Formidable Asset Management, LLC	13,065	0.01%	$270K	-408 (-3.0%)
250	First Bank & Trust	13,029	0.01%	$269K	-389 (-2.9%)

Exited since 2026-03-31 (81 filers; largest 25 shown)

TORONTO DOMINION BANK	−1,565,223
BRIGHTLINE CAPITAL MANAGEMENT, LLC	−1,396,000
COOPER CREEK PARTNERS MANAGEMENT LLC	−929,334
Penn Capital Management Company, LLC	−694,352
CI INVESTMENTS INC.	−420,068
Hyperion Capital Advisors LP	−303,576
Oak Thistle LLC	−71,759
JANUS HENDERSON GROUP PLC	−69,400
K2 PRINCIPAL FUND, L.P.	−60,000
Marex Group plc	−53,043
MIRABELLA FINANCIAL SERVICES LLP	−52,498
MAVERICK CAPITAL LTD	−46,335
CWM, LLC	−42,637
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.	−40,393
Walleye Trading LLC	−28,548
STIFEL FINANCIAL CORP	−21,935
Massar Capital Management, LP	−21,056
ARISTEIA CAPITAL, L.L.C.	−20,605
ALLSTATE CORP	−19,471
Modera Wealth Management, LLC	−18,402
EntryPoint Capital, LLC	−17,978
Aigen Investment Management, LP	−16,916
MACKENZIE FINANCIAL CORP	−16,270
BCS Private Wealth Management, Inc.	−14,624
DAVENPORT & Co LLC	−13,558

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
PRIMECAP MANAGEMENT CO/CA/	SCHEDULE 13G	2026-08-06	2026-06-30	12,285,504	5.03%
Invesco Ltd.	SCHEDULE 13G/A	2026-05-07	2026-04-30	24,529,939	10.1%
The Vanguard Group	SCHEDULE 13G/A	2026-03-26	2026-03-13	0	0%
Jacobs Solutions Inc.	SCHEDULE 13G/A	2025-03-13	2025-03-13	0	0%
Jacobs Engineering Group Inc.	SCHEDULE 13G/A	2025-03-13	2025-03-13	0	0%
BlackRock, Inc.	SCHEDULE 13G/A	2025-02-05	2024-12-31	16,774,241	6.9%
LG Co-Inv. A L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg Co-Inv. IV L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Goldberg 2020 LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
ASP Manager Corp.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18.04%
ASP Amentum Investco LP	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18.04%
American Securities LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18.04%
LG Amentum Holdings GP LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
LG Amentum Holdings LP	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Alan E. Goldberg	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
LG GP Holding IV LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
LG GP Holding V LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Goldberg 2014 LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg Employee Co-Inv. IV L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg GP IV LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg GP V LLC	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg IV - A L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg IV L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg IV - PCF L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg Maverick Co-Inv. L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Lindsay Goldberg V L.P.	SCHEDULE 13D	2024-12-23	2024-12-17	43,893,904	18%
Amentum Joint Venture LP	SCHEDULE 13D/A	2024-12-19	2024-12-17	0	0%
Amentum Joint Venture GP LLC	SCHEDULE 13D/A	2024-12-19	2024-12-17	0	0%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.