---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-316929"
form_type: "8-K"
ticker: "CTMX"
cik: "0001501989"
company_name: "CytomX Therapeutics, Inc."
filed_at: "2026-07-27T12:05:07+00:00"
generated_at: "2026-07-27T12:10:18.770650+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# CytomX appoints Charles Fuchs to Board of Directors as Class II director

## Summary
- Dr. Fuchs appointed effective July 24, 2026, as Class II director with term expiring at 2029 annual meeting.
- Receives option to purchase 118,000 shares at closing price on appointment date, vesting monthly over 3 years.
- Will receive standard non-employee director compensation and enter into indemnification agreement.
- No material transactions or arrangements between Dr. Fuchs and the Company exceeding $120,000.

## SEC filing metadata
- accession: 0001193125-26-316929
- form_type: 8-K
- ticker: CTMX
- cik: 0001501989
- company_name: CytomX Therapeutics, Inc.
- filed_at: 2026-07-27T12:05:07+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1501989/000119312526316929/0001193125-26-316929-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1501989/000119312526316929/d30807d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-316929
- JSON: https://secwatch.observer/filing/0001193125-26-316929.json
- Plain text: https://secwatch.observer/filing/0001193125-26-316929.txt

## Key facts
- Executive change
  Charles Fuchs was appointed as Director at CytomX Therapeutics, Inc..
  - Action: appointed
  - Role: Director
  source text: On July 24, 2026, Charles Fuchs, M.D., M.P.H., was appointed to the Board of Directors (the “Board”) of CytomX Therapeutics, Inc. (the “Company”), effective immediately, as a Class II director
  evidence_url: https://www.sec.gov/Archives/edgar/data/1501989/000119312526316929/0001193125-26-316929-index.htm

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