---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-006491"
form_type: "8-K"
ticker: "AMTM"
cik: "0002011286"
company_name: "Amentum Holdings, Inc."
filed_at: "2026-02-09T23:59:59+00:00"
generated_at: "2026-05-16T03:57:08.209482+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Amentum Q1 revenue $3.24B, net income $44M, EPS $0.18; reaffirms FY2026 guidance

## Summary
- Revenue $3.24B, down 5% YoY; net income $44M up 267% YoY.
- Adjusted EBITDA $263M, margin 8.1% (+40 bps YoY); adjusted EPS $0.54, up 6%.
- Backlog $47.2B; book-to-bill 1.0x (LTM 1.1x).
- Moody's upgraded credit rating to Ba3 from Ba1.
- Company reaffirms fiscal 2026 outlook; CEO cites strong bookings in nuclear, space, and digital infrastructure.

## SEC filing metadata
- accession: 0001628280-26-006491
- form_type: 8-K
- ticker: AMTM
- cik: 0002011286
- company_name: Amentum Holdings, Inc.
- filed_at: 2026-02-09T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2011286/000162828026006491/0001628280-26-006491-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2011286/000162828026006491/amtm-20260209.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-006491
- JSON: https://secwatch.observer/filing/0001628280-26-006491.json
- Plain text: https://secwatch.observer/filing/0001628280-26-006491.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.