---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-201791"
form_type: "8-K"
ticker: null
cik: "0001962918"
company_name: "ACELYRIN, Inc."
filed_at: "2023-08-02T23:59:59+00:00"
generated_at: "2026-06-12T15:06:24.628917+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# CFO Mardi Dier resigns; Gil Labrucherie named interim CFO

## Summary
- Mardi C. Dier resigned as CFO and CBO effective Aug 15, 2023, via mutual agreement.
- Severance: one year base salary ($500K), 50% pro-rated bonus ($62.5K), COBRA for one year, vesting acceleration on 252,607 options.
- Gil Labrucherie appointed interim CFO effective Aug 2, 2023; he previously served as CFO from July to Nov 2022.
- Labrucherie will receive $500 per hour under a consulting agreement; holds CFA and J.D. from Berkeley.
- Company will search for a permanent CFO; Labrucherie serves as principal financial and accounting officer.

## SEC filing metadata
- accession: 0001193125-23-201791
- form_type: 8-K
- cik: 0001962918
- company_name: ACELYRIN, Inc.
- filed_at: 2023-08-02T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1962918/000119312523201791/0001193125-23-201791-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1962918/000119312523201791/d457542d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-201791
- JSON: https://secwatch.observer/filing/0001193125-23-201791.json
- Plain text: https://secwatch.observer/filing/0001193125-23-201791.txt

## Key facts
- Executive change
  Gil Labrucherie was appointed as Chief Financial Officer (Interim) at ACELYRIN, Inc..
  - Action: appointed
  - Role: Chief Financial Officer (Interim)
  source text: the Company appointed Gil Labrucherie as the Company’s Chief Financial Officer on an interim basis, effective as of August 2, 2023
  evidence_url: https://www.sec.gov/Archives/edgar/data/1962918/000119312523201791/0001193125-23-201791-index.htm
- Executive change
  Mardi C. Dier resigned as Chief Financial Officer and Chief Business Officer at ACELYRIN, Inc..
  - Action: resigned
  - Role: Chief Financial Officer and Chief Business Officer
  source text: Mardi C. Dier has resigned from her position as Chief Financial Officer and Chief Business Officer of ACELYRIN, Inc. (the “Company”) through mutual agreement between the Company and Ms. Dier.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1962918/000119312523201791/0001193125-23-201791-index.htm

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