§ PROFESSIONAL SERVICES
USD · Professional ServicesAMTM
AMENTUM HOLDINGS INC
USDSector · Professional ServicesBeta · 1.27
§ 01 · PRICE
Price action
1D5D1M6MYTD1YMAX
§ 03 · SIGNAL STACK · WHAT THE INPUTS SAY
13F FLOW
216 increased/new, 163 decreased/exited (13F)
AC 13F Analysis
§ 04 · FUNDAMENTALS · THE BOOKS
| P/E | 67.3 | P/B | 1.40 |
| EPS (TTM) | 0.40 |
§ 05 · WHO OWNS IT
Top institutional holders
| Fund | Shares | % port | Δ Q/Q |
|---|---|---|---|
| AMERICAN SECURITIES LLC | 45.0M | 29.9% | ±0% |
| BlackRock, Inc. | 17.8M | 0.0% | +2% |
| PRIMECAP MANAGEMENT CO/CA/ | 12.1M | 0.2% | −0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.9M | n/a | n/a |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.7M | n/a | n/a |
| Fidelity Management | 5.6M | 0.0% | −17% |
◇ AC INTELLIGENCE
Top institutional owners for AMTM as of the most recent 13F reporting period (Q1 2026 · Period ended Mar 31). Δ Q/Q reflects share-count change vs. the prior filing — positive green means adding, negative red means trimming. Cross-reference with the ownership-mix bars below to see which strategy cohort is driving the flow.
§ 06 · WHO OWNS IT · BY STRATEGY
OTHER7.8% · 0 holders
OTHER33.3% · 370 holders
DEALER / BANK25.8% · 49 holders
PASSIVE / INDEX19.6% · 9 holders
QUALITY / COMPOUNDER11.1% · 22 holders
INCOME / DEFENSIVE1.4% · 25 holders
TACTICAL / MACRO0.5% · 6 holders
SYSTEMATIC / QUANT0.4% · 6 holders
ACTIVIST0.0% · 1 holder
DEEP VALUE0.0% · 1 holder
◇ AC INTELLIGENCE
Ownership mix by behavioral cohort. Top bars indicate which style of capital dominates the float — passive indexing, quality compounders, dealer/bank, systematic quant, etc. Big quality-compounder share means concentrated active conviction; heavy passive share means flows are dictated by index rebalances, not fundamentals.
§ 07 · INSIDER ACTIVITY · LAST 180 DAYS
NO INSIDER FILINGS
◇ AC INTELLIGENCE
No Form 4 filings on record for AMTM in the last 180 days.
§ 08 · COVERAGE · OUR RECENT NOTES
No notes mention AMTM yet.