---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-123277"
form_type: "8-K"
ticker: "CYTK"
cik: "0001061983"
company_name: "CYTOKINETICS INC"
filed_at: "2024-11-07T23:59:59+00:00"
generated_at: "2026-05-30T03:14:23.690990+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Director Santo J. Costa resigns from Cytokinetics board

## Summary
- Santo J. Costa resigned from the Board of Directors on November 1, 2024.
- Resignation for personal reasons; no disagreement with company policies or operations.
- Board size reduced from nine to eight directors effective immediately.

## SEC filing metadata
- accession: 0000950170-24-123277
- form_type: 8-K
- ticker: CYTK
- cik: 0001061983
- company_name: CYTOKINETICS INC
- filed_at: 2024-11-07T23:59:59+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/1061983/000095017024123277/0000950170-24-123277-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1061983/000095017024123277/cytk-20241101.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-123277
- JSON: https://secwatch.observer/filing/0000950170-24-123277.json
- Plain text: https://secwatch.observer/filing/0000950170-24-123277.txt

## Source-grounded claims
- claim_id: d476569014
  claim: Santo J. Costa resigned as Director at CYTOKINETICS INC.
  evidence_excerpt: On November 1, 2024, Santo J. Costa notified Cytokinetics, Incorporated (the "Company") of his resignation from the Board of Directors of the Company (the "Board of Directors"), with immediate effect.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1061983/000095017024123277/0000950170-24-123277-index.htm

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