---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-23-022701"
form_type: "8-K"
ticker: "MNTS"
cik: "0001781162"
company_name: "Momentus Inc."
filed_at: "2023-05-03T23:59:59+00:00"
generated_at: "2026-06-16T01:26:01.317705+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Momentus accelerates CFO Eric Williams' designation as principal financial and accounting officer

## Summary
- On May 1, 2023, Board designated Eric R. Williams as principal financial and accounting officer, effective immediately.
- Transition from Interim CFO Dennis Mahoney to Williams accelerated ahead of schedule (previously after Q1 2023 10-Q filing).
- Williams remains CFO; Mahoney's interim role ends.

## SEC filing metadata
- accession: 0001140361-23-022701
- form_type: 8-K
- ticker: MNTS
- cik: 0001781162
- company_name: Momentus Inc.
- filed_at: 2023-05-03T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1781162/000114036123022701/0001140361-23-022701-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1781162/000114036123022701/brhc20052428_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-23-022701
- JSON: https://secwatch.observer/filing/0001140361-23-022701.json
- Plain text: https://secwatch.observer/filing/0001140361-23-022701.txt

## Key facts
- Executive change
  Dennis Mahoney changed role as Interim Chief Financial Officer at Momentus Inc..
  - Action: transitioned
  - Role: Interim Chief Financial Officer
  source text: This designation accelerated the transition of responsibilities from the Company’s Interim Chief Financial Officer, Dennis Mahoney, to Mr. Williams, which had previously been scheduled to occur after the filing of the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1781162/000114036123022701/0001140361-23-022701-index.htm
- Executive change
  Eric R. Williams changed role as Chief Financial Officer at Momentus Inc..
  - Action: designated
  - Role: Chief Financial Officer
  source text: On May 1, 2023, the Board of Directors of Momentus Inc. (the “Company”) designated Eric R. Williams, the Company’s Chief Financial Officer, as the Company’s principal financial officer and principal accounting officer, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1781162/000114036123022701/0001140361-23-022701-index.htm

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