AMENTUM HOLDINGS INC (AMTM)
Institutional ownership reported to the SEC as of Q2 2026, across 8 quarters.
429
Reporting holders
$3.4B
Reported value
66.7%
Of shares outstanding
2.1%
Held as options
-27
Holder change
Institutions report 163,045,764 shares against 244,506,413 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| Invesco Ltd. | $515.8M | 24,954,251 | 0.04% | 8q | +16.2%+$71.9M |
| BlackRock, Inc. | $370.1M | 17,906,984 | 0.01% | 8q | HELD |
| PRIMECAP MANAGEMENT CO/CA/ | $253.9M | 12,285,504 | 0.15% | 8q | +1.7%+$4.1M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $164.3M | 7,948,385 | 0.01% | 2q | +1.2%+$2.0M |
| VANGUARD CAPITAL MANAGEMENT LLC | $138.7M | 6,711,987 | 0.00% | 2q | +0.9%+$1.3M |
| FMR LLC | $117.4M | 5,679,175 | 0.01% | 8q | +1.8%+$2.1M |
| DIMENSIONAL FUND ADVISORS LP | $114.5M | 5,537,696 | 0.02% | 8q | +46.2%+$36.2M |
| STATE STREET CORP | $106.5M | 5,151,772 | 0.00% | 8q | +1.4%+$1.5M |
| FRONTIER CAPITAL MANAGEMENT CO LLC | $85.7M | 4,143,971 | 0.80% | 6q | -15.9%-$16.3M |
| Verition Fund Management LLC | $83.5M | 4,038,668 | 0.21% | 7q | +211.2%+$56.7M |
| Troluce Capital Advisors LLC | $73.7M | 3,565,399 | 7.59% | 2q | +256.5%+$53.0M |
| GEODE CAPITAL MANAGEMENT, LLC | $56.2M | 2,716,560 | 0.00% | 8q | -3.5%-$2.0M |
| GOLDMAN SACHS GROUP INC | $56.1M | 2,711,866 | 0.00% | 8q | +139.7%+$32.7M |
| MORGAN STANLEY | $55.0M | 2,662,329 | 0.00% | 8q | +19.1%+$8.8M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $47.9M | 2,318,581 | 0.06% | 5q | -16.8%-$9.6M |
| SEGRA CAPITAL MANAGEMENT, LLC | $46.3M | 2,037,890 | 9.33% | 4q | +26.4%+$9.7M |
| MILLENNIUM MANAGEMENT LLC | $44.0M | 2,127,779 | 0.02% | 8q | +237.2%+$30.9M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $43.8M | 2,120,102 | 0.01% | 8q | +2.5%+$1.1M |
| Sixth Street Partners Management Company, L.P. | $43.8M | 2,120,102 | 0.01% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $42.2M | 2,042,897 | 0.00% | 8q | -15.1%-$7.5M |
| VAN ECK ASSOCIATES CORP | $41.1M | 1,988,898 | 0.03% | 7q | +263.2%+$29.8M |
| VOYA INVESTMENT MANAGEMENT LLC | $40.8M | 1,974,191 | 0.04% | 7q | +64.6%+$16.0M |
| UBS Group AG | $31.9M | 1,545,183 | 0.00% | 8q | -9.7%-$3.4M |
| NORGES BANK | $31.3M | 1,516,193 | 0.00% | 5q | -33.9%-$16.1M |
| Permian Investment Partners, LP | $29.6M | 1,433,028 | 3.25% | 2q | -8.5%-$2.8M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $26.0M | 332,452 | 0.00% | 8q | +0.7%+$187.9K |
| 683 Capital Management, LLC | $22.7M | 1,100,000 | 1.12% | 7q | +41.9%+$6.7M |
| Public Sector Pension Investment Board | $21.9M | 1,057,642 | 0.03% | 7q | +92.4%+$10.5M |
| LOOMIS SAYLES & CO L P | $21.5M | 1,042,522 | 0.03% | 6q | -3.6%-$802.3K |
| Qube Research & Technologies Ltd | $21.4M | 1,034,395 | 0.02% | 3q | +1237.0%+$19.8M |
| NORTHERN TRUST CORP | $21.3M | 1,029,892 | 0.00% | 8q | +4.7%+$946.4K |
| CITADEL ADVISORS LLC | $20.1M | 670,684 | 0.00% | 8q | +731.7%+$17.7M |
| VANGUARD FIDUCIARY TRUST CO | $20.0M | 968,451 | 0.00% | 2q | +2.2%+$433.9K |
| CACTI ASSET MANAGEMENT LLC | $18.2M | 881,692 | 0.91% | 7q | HELD |
| Bank of New York Mellon Corp | $18.2M | 878,084 | 0.00% | 8q | -3.4%-$630.7K |
| Arvin Capital Management LP | $17.9M | 416,705 | 2.34% | 7q | -79.9%-$71.1M |
| Russell Investments Group, Ltd. | $17.4M | 840,642 | 0.02% | 8q | +17.8%+$2.6M |
| AVENIR CORP | $16.8M | 811,726 | 2.04% | 7q | -3.5%-$607.1K |
| WELLS FARGO & COMPANY/MN | $15.5M | 750,214 | 0.00% | 8q | -41.1%-$10.8M |
| PRINCIPAL FINANCIAL GROUP INC | $15.3M | 742,381 | 0.01% | 8q | HELD |
| Ancora Advisors LLC | $14.8M | 715,652 | 0.28% | 8q | +1.8%+$259.1K |
| ROYCE & ASSOCIATES LP | $14.4M | 697,368 | 0.12% | 5q | +26.8%+$3.1M |
| Point72 Asset Management, L.P. | $13.4M | 649,984 | 0.01% | 5q | -60.1%-$20.3M |
| Caption Management, LLC | $12.7M | 64,000 | 0.06% | 7q | +194.6%+$8.4M |
| EXCHANGE TRADED CONCEPTS, LLC | $12.6M | 610,572 | 0.03% | 5q | +107.0%+$6.5M |
| AQR CAPITAL MANAGEMENT LLC | $12.4M | 601,900 | 0.00% | 5q | +18.5%+$1.9M |
| FIRST TRUST ADVISORS LP | $11.3M | 547,907 | 0.01% | 4q | +140.2%+$6.6M |
| Ruane, Cunniff & Goldfarb L.P. | $11.1M | 537,213 | 0.17% | 8q | -66.9%-$22.4M |
| JANE STREET GROUP, LLC | $10.7M | 343,687 | 0.00% | 8q | +79.0%+$4.7M |
| Loews Corp | $10.3M | 500,000 | 0.08% | new | NEW |
| SHAPIRO CAPITAL MANAGEMENT LLC | $9.8M | 475,970 | 0.60% | new | NEW |
| AWH Capital, L.P. | $9.7M | 470,500 | 3.37% | 6q | +100.0%+$4.9M |
| FIRST NATIONAL BANK OF OMAHA | $9.7M | 475,992 | 0.27% | 3q | +91.9%+$4.7M |
| Legacy Advisors, LLC | $9.1M | 9,065,677 | 0.85% | 3q | HELD |
| Nuveen, LLC | $8.7M | 421,495 | 0.00% | 6q | -51.7%-$9.3M |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $8.3M | 402,130 | 0.02% | 4q | +20.5%+$1.4M |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $8.2M | 394,370 | 0.15% | 4q | +81.1%+$3.7M |
| BOOTHBAY FUND MANAGEMENT, LLC | $8.0M | 387,973 | 0.11% | 3q | +350.1%+$6.2M |
| De Lisle Partners LLP | $7.7M | 374,818 | 0.85% | 2q | -1.3%-$103.3K |
| Vident Advisory, LLC | $7.7M | 372,918 | 0.06% | 8q | -4.1%-$329.6K |
| Mawer Investment Management Ltd. | $7.6M | 369,557 | 0.05% | 2q | +10.7%+$739.3K |
| MOORE CAPITAL MANAGEMENT, LP | $7.5M | 365,096 | 0.11% | 7q | -58.2%-$10.5M |
| Legal & General Group Plc | $7.2M | 349,048 | 0.00% | 8q | +4.2%+$292.5K |
| Soviero Asset Management, LP | $6.8M | 150,000 | 2.87% | 5q | -37.5%-$4.1M |
| CenterBook Partners LP | $6.8M | 328,766 | 0.33% | 7q | +128.8%+$3.8M |
| AMERIPRISE FINANCIAL INC | $6.6M | 319,479 | 0.00% | 8q | -51.6%-$7.0M |
| GRIZZLYROCK CAPITAL, LLC | $6.6M | 318,363 | 4.60% | 6q | +10.1%+$604.6K |
| Swiss National Bank | $6.6M | 318,091 | 0.00% | 8q | +1.5%+$97.1K |
| Rovida Investment Management Ltd | $6.5M | 315,000 | 0.44% | 2q | HELD |
| Aristotle Capital Boston, LLC | $6.4M | 307,836 | 0.43% | 8q | -10.8%-$767.7K |
| TWO SIGMA INVESTMENTS, LP | $5.9M | 284,268 | 0.00% | 6q | -68.4%-$12.7M |
| RHUMBLINE ADVISERS | $5.9M | 284,060 | 0.00% | 8q | -5.4%-$335.5K |
| FIFTH THIRD BANCORP | $5.8M | 281,815 | 0.01% | 8q | +3.1%+$175.7K |
| California Public Employees Retirement System | $5.5M | 266,383 | 0.00% | 8q | -3.9%-$220.5K |
| Hudson Value Partners, LLC | $5.2M | 250,185 | 1.30% | 6q | +22.7%+$956.5K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $5.2M | 249,725 | 0.00% | 8q | +0.7%+$36.5K |
| ExodusPoint Capital Management, LP | $4.7M | 226,289 | 0.03% | new | NEW |
| RAYMOND JAMES FINANCIAL INC | $4.6M | 224,399 | 0.00% | 7q | -8.7%-$442.9K |
| Hel Ved Capital Management Ltd | $4.4M | 214,000 | 0.33% | 2q | +19.9%+$733.8K |
| D. E. Shaw & Co., Inc. | $4.0M | 191,488 | 0.00% | 2q | +189.4%+$2.6M |
| SEI INVESTMENTS CO | $3.9M | 190,069 | 0.00% | 8q | -35.5%-$2.2M |
| WEDGE CAPITAL MANAGEMENT L L P/NC | $3.9M | 187,832 | 0.06% | 2q | +14.1%+$478.8K |
| GROUP ONE TRADING LLC | $3.9M | 27,710 | 0.01% | 7q | HELD |
| Verbena Value LP | $3.8M | 186,200 | 0.64% | new | NEW |
| Telos Capital Management, Inc. | $3.8M | 185,611 | 0.34% | 8q | -2.3%-$88.7K |
| OpenArc Corporate Advisory, LLC | $3.5M | 170,291 | 0.04% | 3q | HELD |
| Brevan Howard Capital Management LP | $3.5M | 167,354 | 0.03% | 3q | +116.8%+$1.9M |
| Atom Investors LP | $3.3M | 160,876 | 0.30% | 4q | +605.1%+$2.9M |
| Gotham Asset Management, LLC | $3.2M | 156,113 | 0.01% | 4q | -70.0%-$7.5M |
| Louisiana State Employees Retirement System | $3.2M | 135,700 | 0.03% | 8q | +99.0%+$1.6M |
| BARCLAYS PLC | $3.1M | 151,780 | 0.00% | 8q | +224.2%+$2.2M |
| IMC-Chicago, LLC | $3.1M | options only | 0.00% | 3q | OPTIONS |
| OPPENHEIMER & CO INC | $3.0M | 142,974 | 0.03% | 2q | -15.3%-$535.3K |
| Bryn Mawr Trust Advisors, LLC | $2.9M | 141,443 | 0.13% | 8q | +21.0%+$507.9K |
| PRUDENTIAL FINANCIAL INC | $2.9M | 139,950 | 0.00% | 8q | HELD |
| Focus Partners Wealth | $2.9M | 138,344 | 0.00% | 8q | -94.7%-$51.0M |
| Vanguard Global Advisers, LLC | $2.8M | 137,394 | 0.00% | 2q | +123.8%+$1.6M |
| VANGUARD ASSET MANAGEMENT, Ltd | $2.6M | 127,793 | 0.00% | 2q | HELD |
| JPMORGAN CHASE & CO | $2.6M | 119,174 | 0.00% | 8q | +40.6%+$749.9K |
| SOROS FUND MANAGEMENT LLC | $2.4M | 118,276 | 0.03% | 3q | +9.9%+$220.5K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-06 | 13G | PRIMECAP MANAGEMENT CO/CA/ | 5.0% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 429 | $3.4B | 163,045,764 | 54 | 139 | 138 | 2.1% |
| Q1 2026 | 456 | $5.3B | 196,270,428 | 61 | 134 | 122 | 2.6% |
| Q4 2025 | 449 | $5.5B | 186,653,363 | 65 | 123 | 136 | 2.1% |
| Q3 2025 | 426 | $4.5B | 186,705,088 | 68 | 88 | 145 | 0.8% |
| Q2 2025 | 424 | $4.6B | 191,279,101 | 94 | 213 | 93 | 1.9% |
| Q1 2025 | 385 | $3.4B | 181,056,606 | 67 | 96 | 138 | 2.9% |
| Q4 2024 | 412 | $3.4B | 154,388,914 | 114 | 84 | 136 | 3.8% |
| Q3 2024 | 439 | $3.1B | 96,156,084 | 437 | 0 | 0 | 0.5% |