Amentum Holdings, Inc.
AMTM- Exchange
- NYSE
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0002011286
Insider trades, last 90 days
None
- No open-market purchases or sales were filed in the last 90 days.
13F holders, Q2 2026
464
- −22 vs. Q1 2026
- Total value $4.35B
Superinvestors holding AMTM
1
- At the end of Q2 2026
Price chart
Latest insider trades
View all: Latest insider tradesOpen-market purchases and sales by AMTM insiders, newest first.
| Filed (ET) | Trade date | Insider | Transaction | Shares | Avg price | Value | Shares after | Holding change | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Feb 20, 2025 | Feb 18, 2025 | Loughran BarbaraDirector | PPurchaseCommon Stock | +4.6K | $21.23 | +$97.66K | 4.6K | New position | SEC |
| Feb 14, 2025 | Feb 12, 2025 | DEMETRIOU STEVEN J.Executive Chair | PPurchaseCommon Stock | +100K | $20.81 | +$2.08M | 620.89K | +19.2% | SEC |
Top 5 13F holders, Q2 2026
View all: Top 5 13F holders, Q2 2026The largest institutional positions in AMTM at the end of Q2 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| AMERICAN SECURITIES LLC | 45,026,743 | $930.7M | 24.79% | 00.0% | Unchanged |
| Invesco Ltd. | 24,954,251 | $515.8M | 0.04% | +3,480,473+16.2% | Added |
| BlackRock, Inc. | 17,906,984 | $370.14M | 0.01% | +65,701+0.4% | Added |
| PRIMECAP MANAGEMENT CO/CA/ | 12,285,504 | $253.94M | 0.15% | +200,210+1.7% | Added |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7,948,385 | $164.29M | 0.01% | +95,434+1.2% | Added |