AMENTUM HOLDINGS INC (AMTM) Institutional Ownership Changes & 13F Activity
AMENTUM HOLDINGS INC (AMTM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Fmr Llc, Frontier Capital Management Co Llc, Mirae Asset Global Etfs Holdings Ltd., Cooper Creek Partners Management Llc, and Aqr Capital Management Llc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Advisors Asset Management, Inc. | Sell | -31,064 | -100.0% | 0 | $0.00 | Q4 2025 | Aug 26, 2026 |
| Ensign Peak Advisors, Inc | Sell | -20,600 | -68.7% | 9,386 | $272.19K | Q4 2025 | Aug 18, 2026 |
| Algert Global Llc | Sell | -49,077 | -22.1% | 172,533 | $5.00M | Q4 2025 | Aug 11, 2026 |
| National Philanthropic Trust | Sell | -6,390 | -18.9% | 27,437 | $795.67K | Q4 2025 | May 15, 2026 |
| Strategic Wealth Partners, Ltd. | Buy | +898 | — | 898 | $26.04K | Q4 2025 | May 12, 2026 |
| Union Savings Bank | Buy | +2 | — | 2 | $58.00 | Q4 2025 | Mar 06, 2026 |
| Anchor Investment Management, Llc | Buy | +87 | — | 87 | $2.52K | Q4 2025 | Feb 26, 2026 |
| Td Capital Management Llc | Buy | +18 | — | 18 | $522.00 | Q4 2025 | Feb 26, 2026 |
| Hahn Capital Management Llc | Buy | +61,962 | — | 61,962 | $1.80M | Q4 2025 | Feb 25, 2026 |
| Midfirst Bank | Buy | +33 | — | 33 | $957.00 | Q4 2025 | Feb 25, 2026 |
| Bell Investment Advisors, Inc | Buy | +60 | — | 60 | $1.74K | Q4 2025 | Feb 24, 2026 |
| Mv Capital Management, Inc. | Sell | -1 | -2.8% | 35 | $1.01K | Q4 2025 | Feb 23, 2026 |
| Sunbelt Securities, Inc. | Buy | +1 | — | 1 | $29.00 | Q4 2025 | Feb 20, 2026 |
| Corient Private Wealth Llc | Buy | +36,872 | — | 36,872 | $1.07M | Q4 2025 | Feb 19, 2026 |
| Vident Advisory, Llc | Buy | +382,540 | — | 382,540 | $11.09M | Q4 2025 | Feb 18, 2026 |
| Raymond James Financial Inc | Buy | +168,045 | — | 168,045 | $4.87M | Q4 2025 | Feb 18, 2026 |
| State Of Tennessee, Department Of Treasury | Buy | +46,262 | — | 46,262 | $1.66M | Q4 2025 | Feb 18, 2026 |
| Mercer Global Advisors Inc | Buy | +15,502 | — | 15,502 | $452.63K | Q4 2025 | Feb 18, 2026 |
| Mackenzie Financial Corp | Buy | +15,479 | — | 15,479 | $452.64K | Q4 2025 | Feb 18, 2026 |
| Vermillion & White Wealth Management Group, Llc | Buy | +1,905 | — | 1,905 | $55.24K | Q4 2025 | Feb 18, 2026 |
| Newedge Advisors, Llc | Buy | +598 | — | 598 | $17.34K | Q4 2025 | Feb 18, 2026 |
| Garton & Associates Financial Advisors Llc | Buy | +107 | — | 107 | $3.10K | Q4 2025 | Feb 18, 2026 |
| Fmr Llc | Buy | +6,707,304 | — | 6,707,304 | $194.51M | Q4 2025 | Feb 17, 2026 |
| Frontier Capital Management Co Llc | Buy | +5,772,976 | — | 5,772,976 | $167.42M | Q4 2025 | Feb 17, 2026 |
| Mirae Asset Global Etfs Holdings Ltd. | Buy | +1,961,927 | — | 1,961,927 | $56.90M | Q4 2025 | Feb 17, 2026 |
| Cooper Creek Partners Management Llc | Buy | +1,553,074 | — | 1,553,074 | $45.04M | Q4 2025 | Feb 17, 2026 |
| Aqr Capital Management Llc | Buy | +1,452,049 | — | 1,452,049 | $42.11M | Q4 2025 | Feb 17, 2026 |
| Fil Ltd | Buy | +1,429,384 | — | 1,429,384 | $41.45M | Q4 2025 | Feb 17, 2026 |
| Exoduspoint Capital Management, Lp | Buy | +1,184,186 | — | 1,184,186 | $34.34M | Q4 2025 | Feb 17, 2026 |
| Bank Of America Corp | Buy | +1,157,427 | — | 1,157,427 | $33.57M | Q4 2025 | Feb 17, 2026 |
Frequently asked questions about AMTM activity
Which institutional owners are buying AMTM?
Institutional owners buying AMTM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in AMTM activity?
"Buy" means an investor increased their reported position in AMTM compared to the prior reporting period. This reflects growing exposure to AMENTUM HOLDINGS INC (AMTM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in AMTM increasing?
Institutional interest in AMTM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related AMTM Institutional Insights
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