---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-226903"
form_type: "8-K"
ticker: "KPTI"
cik: "0001503802"
company_name: "Karyopharm Therapeutics Inc."
filed_at: "2023-09-01T23:59:59+00:00"
generated_at: "2026-06-11T00:29:28.013166+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Karyopharm adds Dr. Zhen Su as independent director; board expands to nine

## Summary
- Board increased to nine members; Dr. Su elected as Class III director, term through 2025 annual meeting.
- Dr. Su receives option for 68,000 shares at $1.28 (closing price on grant date), vesting over three years.
- Cash retainer of $50,000 for board service plus $10,000 for committee, prorated from effective date.
- Standard indemnification agreement and no related-party transactions requiring disclosure.
- Appointed to Commercialization and Portfolio Committee.

## SEC filing metadata
- accession: 0001193125-23-226903
- form_type: 8-K
- ticker: KPTI
- cik: 0001503802
- company_name: Karyopharm Therapeutics Inc.
- filed_at: 2023-09-01T23:59:59+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/1503802/000119312523226903/0001193125-23-226903-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1503802/000119312523226903/d539927d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-226903
- JSON: https://secwatch.observer/filing/0001193125-23-226903.json
- Plain text: https://secwatch.observer/filing/0001193125-23-226903.txt

## Key facts
- Executive change
  Zhen Su was elected as Independent Director at Karyopharm Therapeutics Inc..
  - Action: elected
  - Role: Independent Director
  source text: elected Zhen Su, M.D., M.B.A, as an independent director of the Company to fill the newly created vacancy.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1503802/000119312523226903/0001193125-23-226903-index.htm

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