DEMETRIOU STEVEN J. (CIK 1173003) reported 9 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-05-14). Recent activity: Buy ACA (1,087 shares), Buy AMTM (43,396 shares), Sell AMTM (17,077 shares), Buy AMTM (111,355 shares), Buy AMTM (90,727 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-14 | Arcosa, Inc. (ACA) | Director | Buy | 1,087 | $0 |
| 2025-11-19 | Amentum Holdings, Inc. (AMTM) | Executive Chair | Buy | 43,396 | $0 |
| 2025-11-19 | Amentum Holdings, Inc. (AMTM) | Executive Chair | Sell | 17,077 | $366,985 |
| 2025-11-19 | Amentum Holdings, Inc. (AMTM) | Executive Chair | Buy | 111,355 | $0 |
| 2025-11-10 | Amentum Holdings, Inc. (AMTM) | Executive Chair | Buy | 90,727 | $0 |
| 2025-11-10 | Amentum Holdings, Inc. (AMTM) | Executive Chair | Sell | 28,818 | $627,944 |
| 2025-05-15 | Arcosa, Inc. (ACA) | Director | Buy | 1,581 | $0 |
| 2025-02-14 | Amentum Holdings, Inc. (AMTM) | Executive Chair | Buy | 520,893 | $0 |
| 2025-02-14 | Amentum Holdings, Inc. (AMTM) | Executive Chair | Buy | 100,000 | $2.1M |
Source: SEC Form 4 filings · as of 2026-05-14