---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-255090"
form_type: "8-K"
ticker: "SPHR"
cik: "0001795250"
company_name: "Sphere Entertainment Co."
filed_at: "2021-08-24T23:59:59+00:00"
generated_at: "2026-06-29T08:12:09.241361+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Matthew C. Blank resigns from MSGE board effective August 23, 2021

## Summary
- Matthew C. Blank resigned as a director of MSGE effective August 23, 2021.
- Resignation was immediate; no reason disclosed in the Form 8-K.
- Blank's departure leaves a vacancy on the board; no replacement named yet.

## SEC filing metadata
- accession: 0001193125-21-255090
- form_type: 8-K
- ticker: SPHR
- cik: 0001795250
- company_name: Sphere Entertainment Co.
- filed_at: 2021-08-24T23:59:59+00:00
- event_type: leadership
- 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/1795250/000119312521255090/0001193125-21-255090-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1795250/000119312521255090/d552159d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-255090
- JSON: https://secwatch.observer/filing/0001193125-21-255090.json
- Plain text: https://secwatch.observer/filing/0001193125-21-255090.txt

## Key facts
- Executive change
  Matthew C. Blank resigned as director at Sphere Entertainment Co..
  - Action: resigned
  - Role: director
  source text: On August 23, 2021, Matthew C. Blank resigned as a director of Madison Square Garden Entertainment Corp., effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1795250/000119312521255090/0001193125-21-255090-index.htm

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