---
schema_version: "secwatch.filing_event.v1"
accession: "0001441683-21-000094"
form_type: "8-K"
ticker: "APPN"
cik: "0001441683"
company_name: "APPIAN CORP"
filed_at: "2021-12-07T23:59:59+00:00"
generated_at: "2026-06-28T03:07:22.400912+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Appian CFO Mark Lynch to retire March 2022; CAO appointed; guidance reaffirmed

## Summary
- Mark Lynch to retire as CFO effective March 31, 2022; will assist with transition and 10-K filing.
- Mark Matheos appointed Chief Accounting Officer effective Dec 31, 2021; salary $450K, bonus $100K, RSU $250K.
- Company reaffirms Q4 and full-year 2021 guidance previously provided on Nov 4, 2021.
- Lynch's retirement not due to any disagreement on financial statements or operations.

## SEC filing metadata
- accession: 0001441683-21-000094
- form_type: 8-K
- ticker: APPN
- cik: 0001441683
- company_name: APPIAN CORP
- filed_at: 2021-12-07T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 2.02, 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1441683/000144168321000094/0001441683-21-000094-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1441683/000144168321000094/appn-20211207.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001441683-21-000094
- JSON: https://secwatch.observer/filing/0001441683-21-000094.json
- Plain text: https://secwatch.observer/filing/0001441683-21-000094.txt

## Key facts
- Executive change
  Mark Lynch departed as Chief Financial Officer at APPIAN CORP.
  - Action: retire
  - Role: Chief Financial Officer
  source text: On December 1, 2021, Mark Lynch, Chief Financial Officer, notified the Company he plans to retire effective March 31, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1441683/000144168321000094/0001441683-21-000094-index.htm
- Executive change
  Mark Matheos was appointed as Chief Accounting Officer at APPIAN CORP.
  - Action: appointed
  - Role: Chief Accounting Officer
  source text: On December 1, 2021, the Board of Directors approved the appointment of Mark Matheos as Chief Accounting Officer, effective December 31, 2021.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1441683/000144168321000094/0001441683-21-000094-index.htm

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