---
schema_version: "secwatch.filing_event.v1"
accession: "0001447362-23-000009"
form_type: "8-K"
ticker: "CSTL"
cik: "0001447362"
company_name: "CASTLE BIOSCIENCES INC"
filed_at: "2023-01-20T23:59:59+00:00"
generated_at: "2026-06-20T12:22:12.921284+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Castle Biosciences adopts retirement policy accelerating equity vesting for eligible employees

## Summary
- Policy covers VP-level and above employees retiring after age 60 with 5+ years of service.
- Accelerates vesting of time- and performance-based equity awards scheduled to vest within set periods (up to 24 months for CEO).
- Extends post-retirement exercise period to 12 months for vested time-based awards.
- Requires 90-day retirement notice (180 days for CEO) and full release of claims.
- Effective January 13, 2023; designed to encourage long-term retention of senior leaders.

## SEC filing metadata
- accession: 0001447362-23-000009
- form_type: 8-K
- ticker: CSTL
- cik: 0001447362
- company_name: CASTLE BIOSCIENCES INC
- filed_at: 2023-01-20T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1447362/000144736223000009/0001447362-23-000009-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1447362/000144736223000009/cstl-20230113.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001447362-23-000009
- JSON: https://secwatch.observer/filing/0001447362-23-000009.json
- Plain text: https://secwatch.observer/filing/0001447362-23-000009.txt

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