---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-021051"
form_type: "8-K"
ticker: "FUN"
cik: "0001999001"
company_name: "Six Flags Entertainment Corporation/NEW"
filed_at: "2026-01-23T23:59:59+00:00"
generated_at: "2026-05-16T08:33:57.725410+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Six Flags amends Dendur cooperation agreement to permit up to 14.99% economic exposure via cash-settled derivatives

## Summary
- Amendment raises Dendur's beneficial ownership cap from 6% to 14.99% for aggregate economic exposure.
- Dendur may now acquire cash-settled derivative securities decoupled from common stock.
- No other changes to the March 10, 2025 Cooperation Agreement.
- Amendment effective January 21, 2026; filed as Exhibit 10.1.

## SEC filing metadata
- accession: 0001193125-26-021051
- form_type: 8-K
- ticker: FUN
- cik: 0001999001
- company_name: Six Flags Entertainment Corporation/NEW
- filed_at: 2026-01-23T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1999001/000119312526021051/0001193125-26-021051-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1999001/000119312526021051/d62033d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-021051
- JSON: https://secwatch.observer/filing/0001193125-26-021051.json
- Plain text: https://secwatch.observer/filing/0001193125-26-021051.txt

## Key facts
- Material Agreements
  Six Flags Entertainment Corporation/NEW amended Amendment with Dendur Capital LP and certain of its affiliates (effective 2026-01-21).
  - Action: amendment
  - Counterparty: Dendur Capital LP and certain of its affiliates
  - Effective: 2026-01-21
  source text: On January 21, 2026, Six Flags Entertainment Corporation (the " Company ") entered into an amendment (the " Amendment ") to the cooperation agreement (the " Cooperation Agreement ") with Dendur Capital LP and certain of its affiliates (together, " Dendur "), dated March 10, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1999001/000119312526021051/0001193125-26-021051-index.htm

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