---
schema_version: "secwatch.filing_event.v1"
accession: "0001206774-22-001546"
form_type: "8-K"
ticker: "GERN"
cik: "0000886744"
company_name: "GERON CORP"
filed_at: "2022-06-15T23:59:59+00:00"
generated_at: "2026-06-25T01:47:39.773851+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Geron CMO Aleksandra Rizo resigns; Faye Feller named new CMO

## Summary
- Dr. Aleksandra Rizo resigns as EVP and CMO, effective July 8, 2022, to join a private discovery-stage biotech.
- Rizo will remain as Senior Medical and Regulatory Advisor, assisting with IMerge Phase 3 trial data and potential NDA.
- Dr. Faye Feller promoted to EVP and CMO effective July 9; she joined Geron in 2019 from Janssen.
- Feller previously served as Study Responsible Physician for imetelstat's IMbark Phase 2 trial at Janssen.

## SEC filing metadata
- accession: 0001206774-22-001546
- form_type: 8-K
- ticker: GERN
- cik: 0000886744
- company_name: GERON CORP
- filed_at: 2022-06-15T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/886744/000120677422001546/0001206774-22-001546-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/886744/000120677422001546/geron4073661-8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001206774-22-001546
- JSON: https://secwatch.observer/filing/0001206774-22-001546.json
- Plain text: https://secwatch.observer/filing/0001206774-22-001546.txt

## Key facts
- Executive change
  Faye Feller was appointed as Executive Vice President and Chief Medical Officer at GERON CORP.
  - Action: appointed
  - Role: Executive Vice President and Chief Medical Officer
  source text: Effective as of July 9, 2022, Faye Feller, M.D., will assume the duties and responsibilities of Executive Vice President and Chief Medical Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/886744/000120677422001546/0001206774-22-001546-index.htm
- Executive change
  Aleksandra Rizo resigned as Executive Vice President and Chief Medical Officer at GERON CORP.
  - Action: resigned
  - Role: Executive Vice President and Chief Medical Officer
  source text: On June 9, 2022, Aleksandra Rizo, M.D., Ph.D., notified Geron Corporation (the “Company” or “Geron”) of her decision to resign from her position as Executive Vice President and Chief Medical Officer of the Company, with her last day of employment being July 8, 2022
  evidence_url: https://www.sec.gov/Archives/edgar/data/886744/000120677422001546/0001206774-22-001546-index.htm

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