---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-220485"
form_type: "8-K"
ticker: "SPHR"
cik: "0001795250"
company_name: "Sphere Entertainment Co."
filed_at: "2025-09-26T23:59:59+00:00"
generated_at: "2026-05-17T05:35:21.081187+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Sphere Entertainment's Principal Accounting Officer Brunner to resign; CFO Langer interim

## Summary
- Gregory Brunner, SVP, Controller and PAO, resigns effective October 17, 2025.
- Resignation not due to any disagreement with auditors or management on accounting principles.
- Robert Langer, EVP, CFO and Treasurer, will serve as interim principal accounting officer effective October 17.
- Replacement search is ongoing; Langer will continue as CFO and Treasurer.

## SEC filing metadata
- accession: 0001193125-25-220485
- form_type: 8-K
- ticker: SPHR
- cik: 0001795250
- company_name: Sphere Entertainment Co.
- filed_at: 2025-09-26T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1795250/000119312525220485/0001193125-25-220485-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1795250/000119312525220485/d922743d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-220485
- JSON: https://secwatch.observer/filing/0001193125-25-220485.json
- Plain text: https://secwatch.observer/filing/0001193125-25-220485.txt

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