---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-068794"
form_type: "8-K"
ticker: "ASMB"
cik: "0001426800"
company_name: "ASSEMBLY BIOSCIENCES, INC."
filed_at: "2023-12-07T23:59:59+00:00"
generated_at: "2026-06-07T16:06:17.474909+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Assembly Bio appoints Gilead's Cihlar to board and moves HQ to South San Francisco

## Summary
- Appointed Tomas Cihlar, Ph.D., Gilead's SVP of Virology, to the Board effective December 7, 2023, per Investor Rights Agreement.
- Dr. Cihlar will not receive compensation for his Board service.
- Corporate headquarters relocated to Two Tower Place, 7th Floor, South San Francisco, CA 94080 effective December 1, 2023.
- The appointment stems from the October 15, 2023 Investor Rights Agreement with Gilead.

## SEC filing metadata
- accession: 0000950170-23-068794
- form_type: 8-K
- ticker: ASMB
- cik: 0001426800
- company_name: ASSEMBLY BIOSCIENCES, INC.
- filed_at: 2023-12-07T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1426800/000095017023068794/0000950170-23-068794-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1426800/000095017023068794/asmb-20231201.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-068794
- JSON: https://secwatch.observer/filing/0000950170-23-068794.json
- Plain text: https://secwatch.observer/filing/0000950170-23-068794.txt

## Key facts
- Executive change
  Tomas Cihlar was appointed as Board Member at ASSEMBLY BIOSCIENCES, INC..
  - Action: appointed
  - Role: Board Member
  source text: On December 7, 2023, the Board of Directors (the "Board") of Assembly Biosciences, Inc. (the "Company") appointed Tomas Cihlar, Ph.D., a designee of Gilead Sciences, Inc. ("Gilead"), to serve on the Board.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1426800/000095017023068794/0000950170-23-068794-index.htm

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