| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Lindsay Goldberg Employee Co-Inv. IV L.P. | 10%+ Owner | C/O GOLDBERG LINDSAY & CO. LLC, 630 FIFTH AVENUE, 30TH FLOOR, NEW YORK | Lindsay Goldberg Employee Co-Inv. IV L.P. By: Lindsay Goldberg GP IV LLC, its General Partner /s/ James C. Pickel, Jr., Vice President | 12 May 2025 | 0002037350 |
| LG Co-Inv. A L.P. | 10%+ Owner | C/O GOLDBERG LINDSAY & CO. LLC, 630 FIFTH AVENUE, 30TH FLOOR, NEW YORK, | LG CO-INV. A L.P. By: Lindsay Goldberg GP IV LLC, its General Partner, /s/ James C. Pickel, Jr., Vice President By: Lindsay Goldberg GP V LLC, its General Partner, /s/ James C. Pickel, Jr., Vice President | 12 May 2025 | 0002037394 |
| Lindsay Goldberg V L.P. | 10%+ Owner | C/O GOLDBERG LINDSAY & CO. LLC, 630 FIFTH AVENUE, 30TH FLOOR, NEW YORK, | LINDSAY GOLDBERG V L.P. By: Lindsay Goldberg GP V LLC, its General Partner /s/ James C. Pickel, Jr., Vice President | 12 May 2025 | 0001743020 |
| Lindsay Goldberg Maverick Co-Inv. L.P. | 10%+ Owner | C/O GOLDBERG LINDSAY & CO. LLC, 630 FIFTH AVENUE, 30TH FLOOR, NEW YORK, | LINDSAY GOLDBERG MAVERICK CO-INV. L.P. By: Lindsay Goldberg GP V LLC, its General Partner /s/ James C. Pickel, Jr., Vice President | 12 May 2025 | 0002037408 |
| LG Amentum Holdings GP LLC | 10%+ Owner | C/O GOLDBERG LINDSAY & CO. LLC, 630 FIFTH AVENUE, 30TH FLOOR, NEW YORK, | LG AMENTUM HOLDINGS GP LLC /s/ James C. Pickel, Jr., Vice President | 12 May 2025 | 0002037417 |
| LG Amentum Holdings LP | 10%+ Owner | C/O GOLDBERG LINDSAY & CO. LLC, 630 FIFTH AVENUE, 30TH FLOOR, NEW YORK, | LG AMENTUM HOLDINGS LP By: LG Amentum Holdings GP LLC, its General Partner /s/ James C. Pickel, Jr., Vice President | 12 May 2025 | 0002037445 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | AMTM | Common Stock | Other | +1,132,839 | +2.6% | 45,026,743 | 08 May 2025 | See Footnotes | F1, F2, F3 |
| Id | Content |
|---|---|
| F1 | Represents securities received in a pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration. |
| F2 | Mr. Goldberg is the Managing Member of Goldberg 2014 LLC and the Manager of Goldberg 2020 LLC. Goldberg 2014 LLC is the Active Member (and thereby, the manager) of LG GP Holding IV LLC, which is the managing member of Lindsay Goldberg GP IV LLC, which is the general partner of each of Lindsay Goldberg IV L.P., Lindsay Goldberg IV - A L.P., Lindsay Goldberg IV - PCF L.P., Lindsay Goldberg Co-Inv. IV L.P. and Lindsay Goldberg Employee Co-Inv. IV L.P (together, the "LG Fund IV Partnerships"). Goldberg 2020 LLC is the Manager of LG GP Holding V LLC, which is the managing member of Lindsay Goldberg GP V LLC, which is the general partner of each of Lindsay Goldberg V L.P. and Lindsay Goldberg Maverick Co-Inv. L.P. (together, the "LG Fund V Partnerships"). |
| F3 | Each of Lindsay Goldberg GP IV LLC and Lindsay Goldberg GP V LLC are the general partners of LG Co-Inv. A LP. Each of the LG Fund IV Partnerships, the LG Fund V Partnerships and LG Co-Inv. A LP are members of LG Amentum Holdings GP LLC, which is the general partner of LG Amentum Holdings LP. Each of the Reporting Persons other than LG Amentum Holdings LP may be deemed to share beneficial ownership of the Common Shares directly held by LG Amentum Holdings LP. |
Due to limitations of the electronic filing system, Goldberg 2014 LLC, Goldberg 2020 LLC, LG GP Holding IV LLC, LG GP Holding V LLC, Lindsay Goldberg GP IV LLC, Lindsay Goldberg GP V LLC, Lindsay Goldberg IV L.P., Lindsay Goldberg IV - A L.P., Lindsay Goldberg IV - PCF L.P. and Lindsay Goldberg Co-Inv. IV L.P. are filing a separate Form 4. Mr. Goldberg is filing his own Form 4.