---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-23-013235"
form_type: "8-K"
ticker: "XLO"
cik: "0001840233"
company_name: "Xilio Therapeutics, Inc."
filed_at: "2023-08-03T23:59:59+00:00"
generated_at: "2026-06-12T09:21:51.507501+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Xilio Therapeutics promotes Christopher Frankenfield to COO; $500k salary, 150k option grant

## Summary
- Christopher Frankenfield promoted from Chief Legal & Admin Officer to COO effective Aug 3, 2023.
- New annual base salary of $500,000; target bonus set at 50% of base salary.
- Granted option to purchase 150,000 shares of common stock, vesting monthly over 4 years.
- Frankenfield previously served as Chief Legal & Admin Officer since Aug 2022 and at Blueprint Medicines.

## SEC filing metadata
- accession: 0001558370-23-013235
- form_type: 8-K
- ticker: XLO
- cik: 0001840233
- company_name: Xilio Therapeutics, Inc.
- filed_at: 2023-08-03T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1840233/000155837023013235/0001558370-23-013235-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1840233/000155837023013235/xlo-20230803x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-23-013235
- JSON: https://secwatch.observer/filing/0001558370-23-013235.json
- Plain text: https://secwatch.observer/filing/0001558370-23-013235.txt

## Key facts
- Executive change
  Christopher Frankenfield changed role as Chief Operating Officer at Xilio Therapeutics, Inc..
  - Action: promoted
  - Role: Chief Operating Officer
  source text: On August 3, 2023, the board of directors (the “Board”) of Xilio Therapeutics, Inc. (the “Company”) promoted Christopher Frankenfield, the Company’s Chief Legal and Administrative Officer, to the position of Chief Operating Officer, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1840233/000155837023013235/0001558370-23-013235-index.htm

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