---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-026367"
form_type: "8-K"
ticker: "TLN"
cik: "0001622536"
company_name: "Talen Energy Corp"
filed_at: "2025-05-19T23:59:59+00:00"
generated_at: "2026-05-21T01:44:13.164270+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Talen extends Susquehanna Unit 2 outage to June; cost estimate rises to $35M

## Summary
- Planned refueling outage on Unit 2 now expected to finish first week of June, extended from mid-May.
- Incremental maintenance cost increased from ~$20M to ~$35M due to rework in extraction steam system.
- CEO says efficiency gains from improved asset performance will recoup added costs in roughly two years.
- 2025 financial guidance remains unchanged despite outage delay and higher expenses.

## SEC filing metadata
- accession: 0001628280-25-026367
- form_type: 8-K
- ticker: TLN
- cik: 0001622536
- company_name: Talen Energy Corp
- filed_at: 2025-05-19T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1622536/000162828025026367/0001628280-25-026367-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1622536/000162828025026367/tln-20250519.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-026367
- JSON: https://secwatch.observer/filing/0001628280-25-026367.json
- Plain text: https://secwatch.observer/filing/0001628280-25-026367.txt

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