Only open-market buys / sells (codes P/S) are a conviction signal; grants, option exercises, tax-withholding, and gifts are compensation mechanics, shown but greyed. The trailing 12-month tallies run to today but the store covers filings through 2026-06-30 only (SEC bulk data sets publish quarterly), so recent activity may be absent.
| Date | Insider | Role | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-06 | Arnette Stephen A | Officer | −Tax w/h | 3,314 | $24.89 | $82,485 |
| 2026-05-06 | Arnette Stephen A | Officer | +Exercise | 13,609 | — | — |
| 2026-05-06 | Bruning Jill L | Officer | −Tax w/h | 2,731 | $24.89 | $67,975 |
| 2026-05-06 | Bruning Jill L | Officer | +Exercise | 9,072 | — | — |
| 2026-05-06 | Johnson Travis Barton | Officer | +Exercise | 13,609 | — | — |
| 2026-05-06 | Johnson Travis Barton | Officer | −Tax w/h | 4,097 | $24.89 | $101,974 |
| 2026-05-06 | Mullen Sean Thomas | Officer | +Exercise | 9,072 | — | — |
| 2026-05-06 | Mullen Sean Thomas | Officer | −Tax w/h | 2,762 | $24.89 | $68,746 |
| 2026-05-06 | Heller John E. | Director,Officer | −Tax w/h | 8,184 | $24.89 | $203,700 |
| 2026-05-06 | Heller John E. | Director,Officer | +Exercise | 18,145 | — | — |
| 2026-03-04 | Bruning Jill L | Officer | −Gift | 30,000 | — | — |
| 2026-03-02 | Arnette Stephen A | Officer | +Exercise | 2,808 | — | — |
| 2026-03-02 | Arnette Stephen A | Officer | −Tax w/h | 750 | $30.70 | $23,025 |
| 2026-02-17 | St. Mary Michele T | Officer | −Tax w/h | 2,308 | $30.05 | $69,355 |
| 2026-02-17 | St. Mary Michele T | Officer | +Exercise | 7,080 | — | — |
| 2026-02-06 | Vollmer John C. | Director | +Exercise | 11,564 | — | — |
| 2026-02-06 | Vollmer John C. | Director | +Grant | 5,062 | — | — |
| 2026-02-06 | Thompson Christopher M.T. | Director | +Grant | 5,062 | — | — |
| 2026-02-06 | Loughran Barbara | Director | +Grant | 5,062 | — | — |
| 2026-02-06 | EBERHART RALPH E | Director | +Exercise | 11,564 | — | — |
| 2026-02-06 | EBERHART RALPH E | Director | +Grant | 5,062 | — | — |
| 2026-02-06 | Brooks Vincent K | Director | +Exercise | 11,564 | — | — |
| 2026-02-06 | Brooks Vincent K | Director | +Grant | 5,062 | — | — |
| 2026-02-06 | Rowland Sandra E. | Director | +Grant | 5,062 | — | — |
| 2026-02-06 | Rowland Sandra E. | Director | +Exercise | 11,564 | — | — |
| 2026-02-06 | IRELAND SUSAN LESLIE | Director | +Grant | 5,062 | — | — |
| 2026-01-28 | Heller John E. | Director,Officer | −Tax w/h | 19,768 | $35.71 | $705,915 |
| 2026-01-28 | Heller John E. | Director,Officer | +Exercise | 51,979 | — | — |
| 2025-12-17 | Mullen Sean Thomas | Officer | +Exercise | 9,298 | — | — |
| 2025-12-17 | Mullen Sean Thomas | Officer | −Tax w/h | 4,194 | $28.67 | $120,242 |
| 2025-12-05 | Burton Darren | Officer | −Tax w/h | 1,392 | $28.88 | $40,201 |
| 2025-12-05 | Burton Darren | Officer | +Exercise | 2,721 | — | — |
| 2025-11-17 | DEMETRIOU STEVEN J. | Director,Officer | −Tax w/h | 17,077 | $21.49 | $366,985 |
| 2025-11-17 | DEMETRIOU STEVEN J. | Director,Officer | +Grant | 111,355 | — | — |
| 2025-11-17 | DEMETRIOU STEVEN J. | Director,Officer | +Exercise | 43,396 | — | — |
| 2025-11-17 | Arnette Stephen A | Officer | +Grant | 46,769 | — | — |
| 2025-11-17 | Arnette Stephen A | Officer | +Exercise | 1,178 | — | — |
| 2025-11-17 | Arnette Stephen A | Officer | −Tax w/h | 287 | $21.49 | $6,168 |
| 2025-11-17 | St. Mary Michele T | Officer | +Grant | 22,271 | — | — |
| 2025-11-17 | Johnson Travis Barton | Officer | +Grant | 100,220 | — | — |
| 2025-11-17 | Burton Darren | Officer | +Grant | 22,271 | — | — |
| 2025-11-17 | Bruning Jill L | Officer | +Grant | 17,817 | — | — |
| 2025-11-17 | Heller John E. | Director,Officer | +Grant | 155,897 | — | — |
| 2025-11-17 | Mullen Sean Thomas | Officer | +Grant | 17,817 | — | — |
| 2025-11-16 | Arnette Stephen A | Officer | +Exercise | 5,053 | — | — |
| 2025-11-16 | Arnette Stephen A | Officer | +Exercise | 4,596 | — | — |
| 2025-11-16 | Arnette Stephen A | Officer | −Tax w/h | 897 | $22.07 | $19,797 |
| 2025-11-16 | Arnette Stephen A | Officer | +Exercise | 3,681 | — | — |
| 2025-11-16 | Arnette Stephen A | Officer | −Tax w/h | 1,231 | $22.07 | $27,168 |
| 2025-11-16 | Arnette Stephen A | Officer | −Tax w/h | 1,120 | $22.07 | $24,718 |
| 2025-11-15 | Arnette Stephen A | Officer | +Exercise | 5,758 | — | — |
| 2025-11-15 | Arnette Stephen A | Officer | −Tax w/h | 1,403 | $22.07 | $30,964 |
| 2025-11-06 | Arnette Stephen A | Officer | −Tax w/h | 3,093 | $21.79 | $67,396 |
| 2025-11-06 | Arnette Stephen A | Officer | +Exercise | 12,701 | — | — |
| 2025-11-06 | DEMETRIOU STEVEN J. | Director,Officer | +Exercise | 90,727 | — | — |
| 2025-11-06 | DEMETRIOU STEVEN J. | Director,Officer | −Tax w/h | 28,818 | $21.79 | $627,944 |
| 2025-11-06 | Mullen Sean Thomas | Officer | −Tax w/h | 1,621 | $21.79 | $35,322 |
| 2025-11-06 | Mullen Sean Thomas | Officer | +Exercise | 4,838 | — | — |
| 2025-11-06 | Heller John E. | Director,Officer | −Tax w/h | 17,868 | $21.79 | $389,344 |
| 2025-11-06 | Heller John E. | Director,Officer | +Exercise | 39,617 | — | — |
| 2025-11-06 | Bruning Jill L | Officer | −Tax w/h | 1,457 | $21.79 | $31,748 |
| 2025-11-06 | Bruning Jill L | Officer | +Exercise | 4,838 | — | — |
| 2025-11-06 | Johnson Travis Barton | Officer | +Exercise | 12,097 | — | — |
| 2025-11-06 | Johnson Travis Barton | Officer | −Tax w/h | 3,642 | $21.79 | $79,359 |
| 2025-05-08 | Amentum Joint Venture LP | Director | −Other | 2,433,022 | — | — |
| 2025-05-08 | Lindsay Goldberg IV L.P. | TenPercentOwner | +Other | 1,132,839 | — | — |
| 2025-05-08 | GOLDBERG ALAN E | Director,TenPercentOwner | +Other | 1,132,839 | — | — |
| 2025-05-08 | Lindsay Goldberg V L.P. | TenPercentOwner | +Other | 1,132,839 | — | — |
| 2025-04-07 | Amentum Joint Venture GP LLC | Director | +Grant | 2,433,022 | — | — |
| 2025-03-13 | JACOBS ENGINEERING GROUP INC /DE/ | TenPercentOwner | −Other | 19,464,174 | — | — |
| 2025-03-05 | EBERHART RALPH E | Director | +Exercise | 3,447 | — | — |
| 2025-03-05 | Rowland Sandra E. | Director | +Exercise | 3,447 | — | — |
| 2025-03-05 | Brooks Vincent K | Director | +Exercise | 3,447 | — | — |
| 2025-03-05 | Vollmer John C. | Director | +Exercise | 3,447 | — | — |
| 2025-03-05 | IRELAND SUSAN LESLIE | Director | +Exercise | 3,447 | — | — |
| 2025-03-04 | Arnette Stephen A | Officer | +Exercise | 521 | — | — |
| 2025-03-04 | Arnette Stephen A | Officer | −Tax w/h | 152 | $18.71 | $2,844 |
| 2025-03-03 | Arnette Stephen A | Officer | −Tax w/h | 365 | $19.64 | $7,169 |
| 2025-03-03 | Arnette Stephen A | Officer | +Exercise | 1,230 | — | — |
| 2025-02-18 | Loughran Barbara | Director | +Buy | 4,600 | $21.23 | $97,658 |
| 2025-02-12 | DEMETRIOU STEVEN J. | Director,Officer | +Buy | 100,000 | $20.81 | $2M |
| 2024-12-17 | Amentum Joint Venture GP LLC | Director,TenPercentOwner | −Other | 90,021,804 | — | — |
| 2024-12-17 | GOLDBERG ALAN E | Director,TenPercentOwner | +Other | 43,893,904 | — | — |
| 2024-12-17 | Heller John E. | Director,Officer | +Other | 91,794 | — | — |
| 2024-12-17 | Vollmer John C. | Director | +Other | 391,341 | — | — |
| 2024-09-23 | JACOBS SOLUTIONS INC. | TenPercentOwner | −Other | 124,084,108 | — | — |
| 2024-09-18 | DEMETRIOU STEVEN J. | Director,Officer | +Other | 520,893 | — | — |
| 2024-09-18 | Arnette Stephen A | Officer | +Other | 20,786 | — | — |
| 2024-09-18 | EBERHART RALPH E | Director | +Other | 26,439 | — | — |
| 2024-09-18 | Brooks Vincent K | Director | +Other | 6,966 | — | — |
Source: the SEC bulk insider (Form 3/4/5) data sets — non-derivative transactions in the issuer's common stock, most recent first, covering filings through 2026-06-30. Insiders file within 2 business days of a transaction, but the bulk sets publish quarterly, so this store lags live filings; option/derivative lines are excluded. Codes: P buy · S sell · A grant · M/X/C exercise · F tax · G gift.
Model-derived estimate for research. See the Disclaimer.
