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Constellation Energy8-K: Acquisition completed

Constellation Energy completes acquisition of Calpine Corporation, initiating post-merger integration.

What happened

Constellation Energy has finalized its acquisition of Calpine, making it a wholly-owned subsidiary.

Source

SEC EDGARApr 17, 2026

Current report (Form 8-K)

Constellation Energy 8-K

Filing excerpt

On January 7, 2026, Constellation Energy Corporation (Nasdaq: CEG) (“CEG Parent”) and Constellation Energy Generation, LLC, a Pennsylvania limited liability company (“Constellation”) completed the previously announced transactions contemplated by the Agreement and Plan of Merger, dated January 10, 2025 (the “Merger Agreement”), by and among Calpine Corporation, a Delaware corporation (“Calpine”)...

sec.gov/Archives/edgar/data/1168165/000110465926045036/tm2611747d1_8k...Read the full source

Other signals in this filing (2)

Extracted by Autobound

From the Signal API record
Signal
8-K: Acquisition completed

What this signalsIntegration work after a deal often opens needs for new systems and services.

Form
8-K
Filed
Apr 17, 2026

The full record

From the Signal API record

Details

CIK
1168165
Accession number
0001104659-26-045036
Timeframe
Immediate
Filing year
2026
Why it matters
Active integration needs
Signal category
Strategic

Topics and mentions

Vendors

  • PricewaterhouseCoopers LLP
  • Deloitte & Touche LLP

Extraction

Confidence
High
Relevance
90%
Sentiment
Neutral
Detected
Apr 21, 2026
signal_type
sec-8k
signal_subtype
acquisitionCompleted

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The API returns more than this page shows

This page shows a preview. The full sec-8k record in the Signal API and MCP can also have these 8 fields. Some fields are empty for some signals.

Company

  • linkedin_urlValue in the API
  • industriesValue in the API
  • employee_count_lowValue in the API
  • employee_count_highValue in the API
  • revenueValue in the API
  • descriptionValue in the API

Signal

  • signal_nameValue in the API
  • associationValue in the API
Show the full JSONThe record on this page and the API request

GET /v1/signals/f79e92c5-8e94-40d9-be4a-2ffff4176f00 returns this record as JSON. POST /v1/companies/enrich returns every signal for constellationenergy.com.

{
  "signal_id": "f79e92c5-8e94-40d9-be4a-2ffff4176f00",
  "signal_type": "sec-8k",
  "signal_subtype": "acquisitionCompleted",
  "detected_at": "2026-04-21T07:28:42.778+00:00",
  "company": {
    "name": "Constellation Energy",
    "domain": "constellationenergy.com"
  },
  "data": {
    "detail": "Constellation Energy has finalized its acquisition of Calpine, making it a wholly-owned subsidiary. This event triggers a critical post-merger integration phase, which typically involves consolidating disparate financial, IT, and operational systems, creating significant budget and evaluation opportunities for consulting and technology vendors.",
    "metrics": {
      "timeframe": "immediate"
    },
    "summary": "Constellation Energy completes acquisition of Calpine Corporation, initiating post-merger integration.",
    "excerpts": "On January 7, 2026, Constellation Energy Corporation (Nasdaq: CEG) (“CEG Parent”) and Constellation Energy Generation, LLC, a Pennsylvania limited liability company (“Constellation”) completed the previously announced transactions contemplated by the Agreement and Plan of Merger, dated January 10, 2025 (the “Merger Agreement”), by and among Calpine Corporation, a Delaware corporation (“Calpine”)...",
    "relevance": 0.9,
    "sentiment": "neutral",
    "confidence": "high",
    "source_url": "https://www.sec.gov/Archives/edgar/data/1168165/000110465926045036/tm2611747d1_8ka.htm",
    "filing_date": "2026-04-17",
    "filing_year": 2026,
    "sales_relevance": "Active integration needs",
    "signal_category": "strategic",
    "vendors_mentioned": [
      "PricewaterhouseCoopers LLP",
      "Deloitte & Touche LLP"
    ]
  }
}

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