---
schema_version: "secwatch.filing_event.v1"
accession: "0001781162-23-000067"
form_type: "8-K"
ticker: "MNTS"
cik: "0001781162"
company_name: "Momentus Inc."
filed_at: "2023-12-06T23:59:59+00:00"
generated_at: "2026-06-07T17:18:27.563845+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Momentus engages Frank, Rimerman as new independent auditor after Armanino resignation

## Summary
- Engaged Frank, Rimerman + Co. LLP as independent registered public accounting firm effective December 2, 2023.
- Prior auditor Armanino LLP resigned on July 19, 2023, due to its exit from public company audit practice.
- No disagreements or reportable events with Armanino during fiscal years 2021-2022 or interim 2023.
- No prior consultations with Frank, Rimerman on accounting principles or audit opinions.

## SEC filing metadata
- accession: 0001781162-23-000067
- form_type: 8-K
- ticker: MNTS
- cik: 0001781162
- company_name: Momentus Inc.
- filed_at: 2023-12-06T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 4.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1781162/000178116223000067/0001781162-23-000067-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1781162/000178116223000067/mnts-20231206.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001781162-23-000067
- JSON: https://secwatch.observer/filing/0001781162-23-000067.json
- Plain text: https://secwatch.observer/filing/0001781162-23-000067.txt

## Key facts
- Auditor Changes
  Momentus Inc. engaged Frank, Rimerman + Co. LLP as its auditor.
  - Action: engagement
  - Auditor: Frank, Rimerman + Co. LLP
  source text: On December 2, 2023, Momentus Inc. (the “Company”) engaged the firm Frank, Rimerman + Co. LLP (“Frank, Rimerman”) as its new independent registered public accounting firm.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1781162/000178116223000067/0001781162-23-000067-index.htm

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