---
schema_version: "secwatch.filing_event.v1"
accession: "0001580808-23-000180"
form_type: "8-K"
ticker: "ATEN"
cik: "0001580808"
company_name: "A10 Networks, Inc."
filed_at: "2023-09-01T23:59:59+00:00"
generated_at: "2026-06-11T00:30:36.996485+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# A10 Networks EVP Worldwide Sales & Marketing Bruening to retire; Thomas named successor

## Summary
- Matthew Bruening retires as EVP Worldwide Sales and Marketing effective Oct 1, 2023.
- Karen Thomas appointed as new EVP Worldwide Sales and Marketing effective Sept 5, 2023.
- Thomas has over 30 years sales leadership, most recently Chief Growth Officer at Alegeus Technologies.
- Bruening's retirement is not due to any disagreement with the company; he will assist transition through Oct 1.

## SEC filing metadata
- accession: 0001580808-23-000180
- form_type: 8-K
- ticker: ATEN
- cik: 0001580808
- company_name: A10 Networks, Inc.
- filed_at: 2023-09-01T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000180/0001580808-23-000180-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000180/aten-20230830.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001580808-23-000180
- JSON: https://secwatch.observer/filing/0001580808-23-000180.json
- Plain text: https://secwatch.observer/filing/0001580808-23-000180.txt

## Key facts
- Executive change
  Matthew Bruening retired as Executive Vice President, Worldwide Sales and Marketing at A10 Networks, Inc..
  - Action: retired
  - Role: Executive Vice President, Worldwide Sales and Marketing
  source text: Matthew Bruening, Executive Vice President, Worldwide Sales and Marketing of A10 Networks, Inc. (the “Company”), notified the Company of his decision to retire, effective October 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000180/0001580808-23-000180-index.htm
- Executive change
  Karen Thomas was appointed as Executive Vice President, Worldwide Sales and Marketing at A10 Networks, Inc..
  - Action: appointed
  - Role: Executive Vice President, Worldwide Sales and Marketing
  source text: The Company has hired Karen Thomas to be the Company’s next Executive Vice President, Worldwide Sales and Marketing, effective September 5, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1580808/000158080823000180/0001580808-23-000180-index.htm

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