---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-187202"
form_type: "8-K"
ticker: "TSLX"
cik: "0001508655"
company_name: "Sixth Street Specialty Lending, Inc."
filed_at: "2022-07-01T23:59:59+00:00"
generated_at: "2026-06-24T21:40:14.443301+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Sixth Street Specialty Lending appoints Anton Brett as Chief Compliance Officer; Ian Simmonds remains CFO

## Summary
- Ian Simmonds stepped down as Chief Compliance Officer effective June 30, 2022, but continues as CFO.
- Anton Brett appointed Chief Compliance Officer and Secretary, effective June 30, 2022.
- Brett is a Vice President at Sixth Street; prior roles include Scopia Capital and law firms Willkie Farr & Gallagher and Kobre & Kim.

## SEC filing metadata
- accession: 0001193125-22-187202
- form_type: 8-K
- ticker: TSLX
- cik: 0001508655
- company_name: Sixth Street Specialty Lending, Inc.
- filed_at: 2022-07-01T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1508655/000119312522187202/0001193125-22-187202-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1508655/000119312522187202/d376461d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-187202
- JSON: https://secwatch.observer/filing/0001193125-22-187202.json
- Plain text: https://secwatch.observer/filing/0001193125-22-187202.txt

## Key facts
- Executive change
  Anton Brett was appointed as Chief Compliance Officer and Secretary at Sixth Street Specialty Lending, Inc..
  - Action: appointed
  - Role: Chief Compliance Officer and Secretary
  source text: Anton Brett was appointed by the Board of the Company to the position of Chief Compliance Officer and Secretary of the Company
  evidence_url: https://www.sec.gov/Archives/edgar/data/1508655/000119312522187202/0001193125-22-187202-index.htm
- Executive change
  Ian Simmonds changed role as Chief Compliance Officer at Sixth Street Specialty Lending, Inc..
  - Action: stepped down
  - Role: Chief Compliance Officer
  source text: Ian Simmonds would step down from his position as Chief Compliance Officer of the Company
  evidence_url: https://www.sec.gov/Archives/edgar/data/1508655/000119312522187202/0001193125-22-187202-index.htm

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