---
schema_version: "secwatch.filing_event.v1"
accession: "0001580808-23-000122"
form_type: "8-K"
ticker: "ATEN"
cik: "0001580808"
company_name: "A10 Networks, Inc."
filed_at: "2023-06-14T23:59:59+00:00"
generated_at: "2026-06-14T01:14:40.221679+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# A10 Networks dismisses Armanino, appoints Grant Thornton as auditor

## Summary
- Dismissed Armanino LLP as independent auditor effective June 8, 2023.
- Audit Committee engaged Grant Thornton LLP as new auditor for FY 2023 effective June 13, 2023.
- No disagreements or reportable events in the past two fiscal years or subsequent interim period.
- Grant Thornton selected after a competitive request-for-proposal process.

## SEC filing metadata
- accession: 0001580808-23-000122
- form_type: 8-K
- ticker: ATEN
- cik: 0001580808
- company_name: A10 Networks, Inc.
- filed_at: 2023-06-14T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000122/0001580808-23-000122-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000122/aten-20230608.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001580808-23-000122
- JSON: https://secwatch.observer/filing/0001580808-23-000122.json
- Plain text: https://secwatch.observer/filing/0001580808-23-000122.txt

## Key facts
- Auditor Changes
  A10 Networks, Inc. dismissed Armanino LLP as its auditor.
  - Action: dismissal
  - Auditor: Armanino LLP
  source text: On June 8, 2023, the Audit Committee of the Board of Directors of A10 Networks, Inc. (the “ Company ”) dismissed Armanino LLP (“ Armanino ”) as the Company’s independent registered public accounting firm, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000122/0001580808-23-000122-index.htm
- Auditor Changes
  A10 Networks, Inc. engaged Grant Thornton LLP as its auditor.
  - Action: engagement
  - Auditor: Grant Thornton LLP
  source text: On June 13, 2023, following a competitive request-for-proposal process, the Audit Committee approved the engagement of Grant Thornton LLP (“ Grant Thornton ”) as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000122/0001580808-23-000122-index.htm

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