Amentum Holdings, Inc.
AMTM · Services-Business Services, NEC · 244.3M shares · +0%/yr ↓ buyback · EDGAR filings ↗
Reference price $21.23 · est. market cap ~$5.2B — last insider purchase, 2025-02-18 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
C64gen composite 44pct→64
Notable findings
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Strong balance sheetStrong balance sheet — $437M cash & investments
- Notable holderHeld by 5 notable fund(s): FMR LLC, STATE STREET CORP, GOLDMAN SACHS GROUP INC +2 more (as of 2026-03-31)
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Gross margin
10.5%
Operating margin
3.3%
Net margin
0.5%
Return on equity
1.5%
Return on assets
0.6%
ROIC
4.5%
Revenue growth (QoQ)
-0.4%
Debt / equity
0.9×
Current ratio
1.3×
Free cash flow
$516M
Tangible book value
-$3.2B
Cash & investments
$437M
Stock comp / revenue
0.1%
Leadership & compensation
| Name | Role | Latest total comp |
|---|---|---|
| John Heller | Chief Executive Officer | $21M FY2025 |
| Bruning Jill L | Chief Technology Officer | — |
| Burton Darren | Chief People Officer | — |
| Sean Mullen | Chief Growth Officer | $3M FY2025 |
| St. Mary Michele T | Chief Legal Officer & GC | — |
| Stephen A. Arnette | Chief Operating Officer | $4M FY2025 |
| Travis B. Johnson | Chief Financial Officer | $5M FY2025 |
| DEMETRIOU STEVEN J. | Executive Chair | — |
| Steven J. Demetriou Executive | Executive Chair | $5M FY2025 |
| Alan E. Goldberg | Director | $315K FY2025 |
| Amentum Joint Venture GP LLC | Director | — |
| Barbara L. Loughran | Director | $340K FY2025 |
| Benjamin Dickson | Director | $415K FY2025 |
| Brooks Vincent K | Director | — |
| Christopher M.T. Thompson | Director | $315K FY2025 |
| Connor Wentzell | Director | $315K FY2025 |
| EBERHART RALPH E | Director | — |
| General Ralph E. Eberhart | Director | $315K FY2025 |
| General Vincent K. Brooks | Director | $315K FY2025 |
| John Vollmer | Director | $315K FY2025 |
| Russell Triedman | Director | $340K FY2025 |
| S. Leslie Ireland | Director | $315K FY2025 |
| Sandra E. Rowland | Director | $340K FY2025 |
Officers & directors from SEC filings (Form 4 + DEF 14A proxy); compensation is the latest reported fiscal year.
Insider transactions · last 6 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-05-06 | Heller John E. | Option exercise | 18K | — |
| 2026-05-06 | Heller John E. | Tax withheld | 8.2K | $24.89 |
| 2026-05-06 | Mullen Sean Thomas | Option exercise | 9.1K | — |
| 2026-05-06 | Mullen Sean Thomas | Tax withheld | 2.8K | $24.89 |
| 2026-05-06 | Johnson Travis Barton | Option exercise | 14K | — |
| 2026-05-06 | Johnson Travis Barton | Tax withheld | 4.1K | $24.89 |
| 2026-05-06 | Bruning Jill L | Option exercise | 9.1K | — |
| 2026-05-06 | Bruning Jill L | Tax withheld | 2.7K | $24.89 |
| 2026-05-06 | Arnette Stephen A | Option exercise | 14K | — |
| 2026-05-06 | Arnette Stephen A | Tax withheld | 3.3K | $24.89 |
| 2026-03-04 | Bruning Jill L | Gift | 30K | — |
| 2026-03-02 | Arnette Stephen A | Option exercise | 2.8K | — |
| 2026-03-02 | Arnette Stephen A | Tax withheld | 750 | $30.70 |
| 2026-02-17 | St. Mary Michele T | Option exercise | 7.1K | — |
| 2026-02-17 | St. Mary Michele T | Tax withheld | 2.3K | $30.05 |
| 2026-02-06 | IRELAND SUSAN LESLIE | Grant | 5.1K | — |
| 2026-02-06 | Rowland Sandra E. | Option exercise | 12K | — |
| 2026-02-06 | Rowland Sandra E. | Grant | 5.1K | — |
| 2026-02-06 | Brooks Vincent K | Option exercise | 12K | — |
| 2026-02-06 | Brooks Vincent K | Grant | 5.1K | — |
| 2026-02-06 | EBERHART RALPH E | Option exercise | 12K | — |
| 2026-02-06 | EBERHART RALPH E | Grant | 5.1K | — |
| 2026-02-06 | Loughran Barbara | Grant | 5.1K | — |
| 2026-02-06 | Thompson Christopher M.T. | Grant | 5.1K | — |
| 2026-02-06 | Vollmer John C. | Option exercise | 12K | — |
| 2026-02-06 | Vollmer John C. | Grant | 5.1K | — |
| 2026-01-28 | Heller John E. | Option exercise | 52K | — |
| 2026-01-28 | Heller John E. | Tax withheld | 20K | $35.71 |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 10-Q | 2026-05-12 | 2026-04-03 | 0001628280-26-034156 ↗ |
| 8-K | 2026-05-11 | 2026-05-11 | 0001628280-26-033648 ↗ |
| 8-K | 2026-04-28 | 2026-04-24 | 0002011286-26-000011 ↗ |
| 8-K | 2026-02-10 | 2026-02-06 | 0001628280-26-006679 ↗ |
| 10-Q | 2026-02-10 | 2026-01-02 | 0001628280-26-006676 ↗ |
| 8-K | 2026-02-09 | 2026-02-09 | 0001628280-26-006491 ↗ |
| DEF 14A | 2025-12-19 | 2026-02-06 | 0001104659-25-123111 ↗ |
| 10-K | 2025-11-25 | 2025-10-03 | 0001628280-25-053993 ↗ |
| 8-K | 2025-11-24 | 2025-11-24 | 0001628280-25-053839 ↗ |
| 10-Q | 2025-08-06 | 2025-06-27 | 0002011286-25-000163 ↗ |
| 8-K | 2025-08-05 | 2025-08-05 | 0002011286-25-000158 ↗ |
| 10-Q | 2025-05-07 | 2025-03-28 | 0002011286-25-000141 ↗ |