---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-002193"
form_type: "8-K"
ticker: null
cik: "0001673772"
company_name: "RAPT Therapeutics, Inc."
filed_at: "2025-01-06T23:59:59+00:00"
generated_at: "2026-05-28T10:54:32.087598+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# RAPT Therapeutics appoints Lori Lyons-Williams as Board Chair; Rieflin resigns

## Summary
- William Rieflin resigned from Board effective Jan 3, 2025; no disagreement with company.
- He continues as consultant; Board size reduced to six directors.
- Lori Lyons-Williams appointed Chair of the Board on Jan 5, 2025.
- Linda Kozick appointed to Audit Committee in connection with changes.

## SEC filing metadata
- accession: 0000950170-25-002193
- form_type: 8-K
- cik: 0001673772
- company_name: RAPT Therapeutics, Inc.
- filed_at: 2025-01-06T23:59:59+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/1673772/000095017025002193/0000950170-25-002193-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1673772/000095017025002193/rapt-20250103.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-002193
- JSON: https://secwatch.observer/filing/0000950170-25-002193.json
- Plain text: https://secwatch.observer/filing/0000950170-25-002193.txt

## Key facts
- Executive change
  Lori Lyons-Williams was appointed as Chair of the Board at RAPT Therapeutics, Inc..
  - Action: appointed
  - Role: Chair of the Board
  source text: On January 5, 2025, the Board appointed Lori Lyons-Williams as Chair of the Board to succeed Mr. Rieflin.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1673772/000095017025002193/0000950170-25-002193-index.htm
- Executive change
  William Rieflin resigned as director at RAPT Therapeutics, Inc..
  - Action: resigned
  source text: On January 3, 2025, William Rieflin resigned from the Board of Directors (the “Board”) of RAPT Therapeutics, Inc. (the “Company”), effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1673772/000095017025002193/0000950170-25-002193-index.htm

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