ECP ControlCo, LLC - 30 Jun 2026 SCHEDULE 13G/A Report for Constellation Energy Corp Common Stock (CEG)

Filing manager
ECP ControlCo, LLC
Reporting owner
ECP ControlCo, LLC
Security
Constellation Energy Corp Common Stock
Beneficially owned shares
14,443,227 shares
Ownership signal CIK-linked ownership evidence from parsed SEC filings. 2 signals
Large-stake signal

Form

SCHEDULE 13G/A

Passive or exempt beneficial ownership filing.

Ownership

4%

Beneficial ownership of this reported class.

Shares

14,443,227 shares

Shares beneficially owned as disclosed.

Event date

30 Jun 2026

Date tied to the ownership event or amendment.

Accepted by SEC

07 Aug 2026

EDGAR acceptance date.

How to read this large-stake filing
  • Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
  • Compare this filing with the holder history and issuer page before treating the percentage as a current position.
  • Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership
4%
Subject security Names, identifiers, and filing context for this profile. 2 source fields
Symbol
CEG
Shares outstanding
361,080,675 shares
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
SCHEDULE 13G/A
Accepted by SEC
07 Aug 2026, 16:30:06 UTC
Event date
30 Jun 2026
Prior SEC filing
14 Jan 2026
Source filing
View source filing

Key filing fact

ECP ControlCo, LLC disclosed 4% ownership in Constellation Energy Corp Common Stock (CEG) on 30 Jun 2026.

Key facts

  • ECP ControlCo, LLC filed SCHEDULE 13G/A for Constellation Energy Corp Common Stock (CEG).
  • Disclosed ownership: 4%.
  • Date of event: 30 Jun 2026.

Change

  • Previous schedule filing date: 14 Jan 2026.
  • Current filing was accepted on 07 Aug 2026, 16:30.

Research use

  • This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
  • Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

View source filing

Reporting persons

Disclosed reporting parties (17)

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name Ownership Shares owned Sole voting power Shared voting power Signature Title CIK
ECP ControlCo, LLC 4% 14,443,227 0 14,443,227 By /s/ Jennifer Gray Jennifer Gray, General Counsel
Energy Capital Partners III, LLC 2% 7,232,996 0 7,232,996 By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
Energy Capital Partners IV, LLC 0.4% 1,466,151 0 1,466,151 By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
ECP Calpine GP, LLC 1.6% 5,744,080 0 5,744,080 By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
ECP III Volt Holdings, LLC 0.02% 69,149 0 69,149 By: Energy Capital Partners III, LP, Energy Capital Partners GP III, LP, Energy Capital Partners III, LLC, ECP ControlCo, LLC, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
ECP III-A Volt Holdings, LLC 0.7% 2,327,800 0 2,327,800 By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP III-B Volt Holdings, LLC 0.1% 281,120 0 281,120 By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP III-C Volt Holdings, LP 0.3% 962,349 0 962,349 By: ECP III Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP III-D Volt Holdings, LP 0.3% 1,187,704 0 1,187,704 By: ECP III Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP Checkerspot Holdings, LP 0.7% 2,404,874 0 2,404,874 By: Volt Parent GP, LLC, Energy Capital Partners III, LLC, ECP ControlCo, LLC, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
ECP IV-A Volt Holdings, LP 0.1% 351,240 0 351,240 By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP IV-B Volt Holdings, LP 0.02% 58,863 0 58,863 By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP IV-C Volt Holdings, LP 0.1% 291,129 0 291,129 By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP IV-D Volt Holdings, LP 0.2% 764,919 0 764,919 By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray Jennifer Gray, Executive Vice President & General Counsel
ECP Calpine Fund GP, LP 1.6% 5,744,080 0 5,744,080 By: ECP Calpine GP, LLC, its general partner, By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
ECP Calpine Continuation Fund, LP 1.3% 4,702,479 0 4,702,479 By: ECP Calpine Fund GP, LP, By: ECP Calpine GP, LLC, By: ECP ControlCo, LLC, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
ECP Calpine Rollover Fund, LP 0.1% 399,812 0 399,812 By: ECP Calpine Fund GP, LP, By: ECP Calpine GP, By: LLC, ECP ControlCo, LLC, By: /s/ Jennifer Gray Jennifer Gray, General Counsel
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