---
schema_version: "secwatch.filing_event.v1"
accession: "0001962918-24-000075"
form_type: "8-K/A"
ticker: null
cik: "0001962918"
company_name: "ACELYRIN, Inc."
filed_at: "2024-05-28T23:59:59+00:00"
generated_at: "2026-06-01T08:23:10.054210+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# ACELYRIN names Mina Kim CEO; Kim gets $640k base, 1.2M option grant; ex-CEO Lin severance disclosed

## Summary
- Mina Kim appointed CEO effective May 9, 2024, and to Board; Shao-Lee Lin stepped down as CEO and Board member.
- Lin receives severance: 18 months base salary, equity vesting acceleration, pro-rated 2024 bonus, up to 24 months health premiums.
- Kim's annual base salary $640,000, target bonus 55% of base, and option to purchase 1,195,856 shares under 2023 EIP.
- Ron Oyston steps down as Chief People Officer effective Aug 15, 2024; gets 12 months salary continuation, COBRA, equity vesting.
- Kim previously served as Chief Legal and Administrative Officer; background includes Zymergen, Atara, Sunrun.

## SEC filing metadata
- accession: 0001962918-24-000075
- form_type: 8-K/A
- cik: 0001962918
- company_name: ACELYRIN, Inc.
- filed_at: 2024-05-28T23:59:59+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/1962918/000196291824000075/0001962918-24-000075-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1962918/000196291824000075/slrn-20240508.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001962918-24-000075
- JSON: https://secwatch.observer/filing/0001962918-24-000075.json
- Plain text: https://secwatch.observer/filing/0001962918-24-000075.txt

## Key facts
- Executive change
  Ron Oyston departed as Chief People Officer at ACELYRIN, Inc..
  - Action: step down
  - Role: Chief People Officer
  source text: the Company and Ron Oyston mutually agreed that Mr. Oyston will step down from his position as Chief People Officer, effective August 15, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1962918/000196291824000075/0001962918-24-000075-index.htm
- Executive change
  Mina Kim was appointed as Director at ACELYRIN, Inc..
  - Action: appointed
  - Role: Director
  source text: and was appointed as a member of the Board of Directors of the Company
  evidence_url: https://www.sec.gov/Archives/edgar/data/1962918/000196291824000075/0001962918-24-000075-index.htm
- Executive change
  Mina Kim was appointed as Chief Executive Officer at ACELYRIN, Inc..
  - Action: appointed
  - Role: Chief Executive Officer
  source text: Effective May 9, 2024, Mina Kim was appointed as the Chief Executive Officer of the Company
  evidence_url: https://www.sec.gov/Archives/edgar/data/1962918/000196291824000075/0001962918-24-000075-index.htm
- Executive change
  Shao-Lee Lin, M.D., Ph.D. departed as Chief Executive Officer at ACELYRIN, Inc..
  - Action: stepped down
  - Role: Chief Executive Officer
  source text: By mutual agreement of Shao-Lee Lin, M.D., Ph.D. and the Company, Dr. Lin stepped down from her position as Chief Executive Officer and as a member of the Board, effective on May 8, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1962918/000196291824000075/0001962918-24-000075-index.htm

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