# EDGAR Filing Document

**Accession Number:** 0001707921
**File Stem:** 0001493152-26-002269
**Filing Date:** 2026-1
**Character Count:** 47263
**Document Hash:** 3d30ca531bc839053410459d9354fd34
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-26-002269.hdr.sgml**: 20260114

**ACCESSION NUMBER**: 0001493152-26-002269

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260114

**DATE AS OF CHANGE**: 20260114

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Constellation Energy Corp
- **CENTRAL INDEX KEY:** 0001868275
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 871210716
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-93590
- **FILM NUMBER:** 26533613

**BUSINESS ADDRESS:**
- **STREET 1:** 1310 POINT STREET
- **CITY:** BALTIMORE
- **STATE:** MD
- **ZIP:** 21231
- **BUSINESS PHONE:** 833-883-0162

**MAIL ADDRESS:**
- **STREET 1:** 1310 POINT STREET
- **CITY:** BALTIMORE
- **STATE:** MD
- **ZIP:** 21231

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Constellation Newholdco, Inc.
- **DATE OF NAME CHANGE:** 20210617
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ECP ControlCo, LLC
- **CENTRAL INDEX KEY:** 0001707921

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G

**BUSINESS ADDRESS:**
- **STREET 1:** 40 BEECHWOOD ROAD
- **CITY:** SUMMIT
- **STATE:** NJ
- **ZIP:** 07901
- **BUSINESS PHONE:** (973) 671-6100

**MAIL ADDRESS:**
- **STREET 1:** 40 BEECHWOOD ROAD
- **CITY:** SUMMIT
- **STATE:** NJ
- **ZIP:** 07901

## Ex-99

**Exhibit 99**

**JOINT FILING AGREEMENT**

In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13G. Each of them is responsible for the timely filing of such statement and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate.

IN WITNESS WHEREOF, the undersigned hereby execute this Joint Filing Agreement as of January 14, 2026.

---

| | |
|:---|:---|
| **ECP ControlCo, LLC** | **ECP ControlCo, LLC** |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |
| **Energy Capital Partners III, LLC** | **Energy Capital Partners III, LLC** |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |
| **Energy Capital Partners IV, LLC** | **Energy Capital Partners IV, LLC** |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |
| **ECP Calpine GP, LLC** | **ECP Calpine GP, LLC** |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |
| **ECP III Volt Holdings, LLC** | **ECP III Volt Holdings, LLC** |
| By: Energy Capital Partners III, LP, its member | By: Energy Capital Partners III, LP, its member |
| By: Energy Capital Partners GP III, LP, its general partner | By: Energy Capital Partners GP III, LP, its general partner |
| By: Energy Capital Partners III, LLC, its general partner | By: Energy Capital Partners III, LLC, its general partner |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |

---

---

| | |
|:---|:---|
| **ECP III-A Volt Holdings, LLC** | **ECP III-A Volt Holdings, LLC** |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |
| **ECP III-B Volt Holdings, LLC** | **ECP III-B Volt Holdings, LLC** |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |
| **ECP III-C Volt Holdings, LP** | **ECP III-C Volt Holdings, LP** |
| By: ECP III Volt Holdings GP, LLC, its general partner | By: ECP III Volt Holdings GP, LLC, its general partner |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |
| **ECP III-D Volt Holdings, LP** | **ECP III-D Volt Holdings, LP** |
| By: ECP III Volt Holdings GP, LLC, its general partner | By: ECP III Volt Holdings GP, LLC, its general partner |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |
| **ECP Checkerspot Holdings, LP** | **ECP Checkerspot Holdings, LP** |
| By: Volt Parent GP, LLC, its general partner | By: Volt Parent GP, LLC, its general partner |
| By: Energy Capital Partners III, LLC, its managing member | By: Energy Capital Partners III, LLC, its managing member |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |
| **ECP IV-A Volt Holdings, LP** | **ECP IV-A Volt Holdings, LP** |
| By: ECP IV Volt Holdings GP, LLC, its general partner | By: ECP IV Volt Holdings GP, LLC, its general partner |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |

---

---

| | |
|:---|:---|
| **ECP IV-B Volt Holdings, LP** | **ECP IV-B Volt Holdings, LP** |
| By: ECP IV Volt Holdings GP, LLC, its general partner | By: ECP IV Volt Holdings GP, LLC, its general partner |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |
| **ECP IV-C Volt Holdings, LP** | **ECP IV-C Volt Holdings, LP** |
| By: ECP IV Volt Holdings GP, LLC, its general partner | By: ECP IV Volt Holdings GP, LLC, its general partner |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |
| **ECP IV-D Volt Holdings, LP** | **ECP IV-D Volt Holdings, LP** |
| By: ECP IV Volt Holdings GP, LLC, its general partner | By: ECP IV Volt Holdings GP, LLC, its general partner |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | Executive Vice President & General Counsel |
| **ECP Calpine Fund GP, LP** | **ECP Calpine Fund GP, LP** |
| By: ECP Calpine GP, LLC, its general partner | By: ECP Calpine GP, LLC, its general partner |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |
| **ECP Calpine Continuation Fund, LP** | **ECP Calpine Continuation Fund, LP** |
| By: ECP Calpine Fund GP, LP, its general partner | By: ECP Calpine Fund GP, LP, its general partner |
| By: ECP Calpine GP, LLC, its managing member | By: ECP Calpine GP, LLC, its managing member |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |
| **ECP Calpine Rollover Fund, LP** | **ECP Calpine Rollover Fund, LP** |
| By: ECP Calpine Fund GP, LP, its general partner | By: ECP Calpine Fund GP, LP, its general partner |
| By: ECP Calpine GP, LLC, its managing member | By: ECP Calpine GP, LLC, its managing member |
| By: ECP ControlCo, LLC, its managing member | By: ECP ControlCo, LLC, its managing member |
| By: | */s/ Jennifer Gray* |
| Name: | Jennifer Gray |
| Title: | General Counsel |

---

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**Issuer:** Constellation Energy Corp

**Title of Class of Securities:** Common Stock

**CUSIP Number:** 21037T109

**Date of Event Which Requires Filing of this Statement:** 01/07/2026

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [x] Rule 13d-1(c)

- [ ] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>ECP ControlCo, LLC | Names of Reporting Persons<br>ECP ControlCo, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>22043724.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>22043724.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>22043724.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>22043724.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>6.1% | Percent of Class Represented by Amount in Row (9)<br>6.1% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** Limited Liability Company

---

| 1. | Names of Reporting Persons<br>Energy Capital Partners III, LLC | Names of Reporting Persons<br>Energy Capital Partners III, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>11183651.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>11183651.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>11183651.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>11183651.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>3.1% | Percent of Class Represented by Amount in Row (9)<br>3.1% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** Limited Liability Company

---

| 1. | Names of Reporting Persons<br>Energy Capital Partners IV, LLC | Names of Reporting Persons<br>Energy Capital Partners IV, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>2266957.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>2266957.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2266957.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2266957.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.6% | Percent of Class Represented by Amount in Row (9)<br>0.6% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** Limited Liability Company

---

| 1. | Names of Reporting Persons<br>ECP Calpine GP, LLC | Names of Reporting Persons<br>ECP Calpine GP, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>8593116.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>8593116.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>8593116.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>8593116.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>2.4% | Percent of Class Represented by Amount in Row (9)<br>2.4% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** Limited Liability Company

---

| 1. | Names of Reporting Persons<br>ECP III Volt Holdings, LLC | Names of Reporting Persons<br>ECP III Volt Holdings, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>106918.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>106918.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>106918.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>106918.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.03% | Percent of Class Represented by Amount in Row (9)<br>0.03% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** Limited Liability Company

---

| 1. | Names of Reporting Persons<br>ECP III-A Volt Holdings, LLC | Names of Reporting Persons<br>ECP III-A Volt Holdings, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>3599243.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>3599243.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>3599243.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>3599243.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>1.0% | Percent of Class Represented by Amount in Row (9)<br>1.0% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** Limited Liability Company

---

| 1. | Names of Reporting Persons<br>ECP III-B Volt Holdings, LLC | Names of Reporting Persons<br>ECP III-B Volt Holdings, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>434667.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>434667.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>434667.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>434667.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.1% | Percent of Class Represented by Amount in Row (9)<br>0.1% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** Limited Liability Company

---

| 1. | Names of Reporting Persons<br>ECP III-C Volt Holdings, LP | Names of Reporting Persons<br>ECP III-C Volt Holdings, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1487983.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1487983.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1487983.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1487983.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.4% | Percent of Class Represented by Amount in Row (9)<br>0.4% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP III-D Volt Holdings, LP | Names of Reporting Persons<br>ECP III-D Volt Holdings, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1836426.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1836426.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1836426.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1836426.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.5% | Percent of Class Represented by Amount in Row (9)<br>0.5% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP Checkerspot Holdings, LP | Names of Reporting Persons<br>ECP Checkerspot Holdings, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>3718414.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>3718414.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>3718414.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>3718414.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>1.0% | Percent of Class Represented by Amount in Row (9)<br>1.0% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP IV-A Volt Holdings, LP | Names of Reporting Persons<br>ECP IV-A Volt Holdings, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>543086.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>543086.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>543086.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>543086.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.1% | Percent of Class Represented by Amount in Row (9)<br>0.1% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP IV-B Volt Holdings, LP | Names of Reporting Persons<br>ECP IV-B Volt Holdings, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>91013.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>91013.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>91013.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>91013.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.03% | Percent of Class Represented by Amount in Row (9)<br>0.03% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP IV-C Volt Holdings, LP | Names of Reporting Persons<br>ECP IV-C Volt Holdings, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>450142.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>450142.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>450142.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>450142.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.1% | Percent of Class Represented by Amount in Row (9)<br>0.1% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP IV-D Volt Holdings, LP | Names of Reporting Persons<br>ECP IV-D Volt Holdings, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1182716.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1182716.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1182716.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1182716.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.3% | Percent of Class Represented by Amount in Row (9)<br>0.3% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP Calpine Fund GP, LP | Names of Reporting Persons<br>ECP Calpine Fund GP, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>8593116.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>8593116.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>8593116.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>8593116.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>2.4% | Percent of Class Represented by Amount in Row (9)<br>2.4% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP Calpine Continuation Fund, LP | Names of Reporting Persons<br>ECP Calpine Continuation Fund, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>7270971.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>7270971.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7270971.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>7270971.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>2.0% | Percent of Class Represented by Amount in Row (9)<br>2.0% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>ECP Calpine Rollover Fund, LP | Names of Reporting Persons<br>ECP Calpine Rollover Fund, LP |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>618188.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>618188.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>618188.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>618188.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.2% | Percent of Class Represented by Amount in Row (9)<br>0.2% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

**Item 1(a). Name of Issuer:**
Constellation Energy Corp

**Item 1(b). Address of Issuer's Principal Executive Offices:**
1310 Point Street, Baltimore, Maryland 21231

**Item 2(a). Name of Person Filing:**
Each of the following is hereinafter individually referred to as a "Reporting Person" and collectively as the "Reporting Persons." This statement is filed on behalf of:

ECP ControlCo, LLC

Energy Capital Partners III, LLC

Energy Capital Partners IV, LLC

ECP Calpine GP, LLC

ECP III Volt Holdings, LLC

ECP III-A Volt Holdings, LLC

ECP III-B Volt Holdings, LLC

ECP III-C Volt Holdings, LP

ECP III-D Volt Holdings, LP

ECP Checkerspot Holdings, LP

ECP IV-A Volt Holdings, LP

ECP IV-B Volt Holdings, LP

ECP IV-C Volt Holdings, LP

ECP IV-D Volt Holdings, LP

ECP Calpine Fund GP, LP

ECP Calpine Continuation Fund, LP

ECP Calpine Rollover Fund, LP

**Item 2(b). Address of Principal Business Office:**
The principal business office address for each of the Reporting Persons is c/o ECP ControlCo, LLC, 40 Beechwood Road, Summit, NJ 07901.

**Item 2(c). Citizenship:**
Each of the Reporting Persons is organized under the laws of the State of Delaware.

**Item 2(d). Title of Class of Securities:**
Common Stock

**Item 2(e). CUSIP Number:**
21037T109

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

The information contained on the cover pages to this Schedule 13G is incorporated by reference into this Item 4.
The ownership information presented herein represents beneficial ownership of Common Stock as of the date of this filing, based upon 362,355,476 shares of Common Stock outstanding as of January 7, 2026, as disclosed by the Issuer.
The number of securities reported as beneficially owned herein includes: 106,918 shares of Common Stock held by ECP III Volt Holdings, LLC; 3,599,243 shares of Common Stock held by ECP III-A Volt Holdings, LLC; 434,667 shares of Common Stock held by ECP III-B Volt Holdings, LLC; 1,487,983 shares of Common Stock held by ECP III-C Volt Holdings, LP; 1,836,426 shares of Common Stock held by ECP III-D Volt Holdings, LP; 3,718,414 shares of Common Stock held by ECP Checkerspot Holdings, LP; 543,086 shares of Common Stock held by ECP IV-A Volt Holdings, LP; 91,013 shares of Common Stock held by ECP IV-B Volt Holdings, LP; 450,142 shares of Common Stock held by ECP IV-C Volt Holdings, LP; 1,182,716 shares of Common Stock held by ECP IV-D Volt Holdings, LP; 703,957 shares of Common Stock held by ECP Calpine Fund GP, LP.; 7,270,971 shares of Common Stock held by ECP Calpine Continuation Fund, LP; and 618,188 shares of Common Stock held by ECP Calpine Rollover Fund, LP.
ECP ControlCo, LLC is the managing member of each of Energy Capital Partners III, LLC, Energy Capital Partners IV, LLC and ECP Calpine GP, LLC.
Energy Capital Partners III, LLC, as a result of its indirect control over each of the following entities, may be deemed to share beneficial ownership of the securities held of record by each of ECP III Volt Holdings, LLC, ECP III-A Volt Holdings, LLC, ECP III-B Volt Holdings, LLC, ECP III-C Volt Holdings, LP, ECP III-D Volt Holdings, LP, and ECP Checkerspot Holdings, LP.
Energy Capital Partners IV, LLC, as a result of its indirect control over each of the following entities, may be deemed to share beneficial ownership of the securities held of record by each of ECP IV-A Volt Holdings, LP, ECP IV-B Volt Holdings, LP, ECP IV-C Volt Holdings, LP, and ECP IV-D Volt Holdings, LP.
ECP Calpine GP, LLC, as a result of its direct control over ECP Calpine Fund GP, LP and indirect control over each of the following entities, may be deemed to share beneficial ownership of the securities held of record by each of ECP Calpine Continuation Fund, LP and ECP Calpine Rollover Fund, LP. ECP Calpine Fund GP, LP in its capacity as the general partner of ECP Calpine Continuation Fund, LP and ECP Calpine Rollover Fund, LP may also be deemed to share beneficial ownership of the securities held of record by each of ECP Calpine Continuation Fund, LP and ECP Calpine Rollover Fund, LP.
ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC.
As a result of the relationships described herein, each of ECP ControlCo, LLC and the individuals named herein may be deemed to share beneficial ownership of the securities that may be deemed to be beneficially owned by each of Energy Capital Partners IV, LLC, Energy Capital Partners III, LLC and ECP Calpine GP, LLC. Each of them disclaims any such beneficial ownership.

**(b) Percent of class:**

See the information contained on the cover pages to this Schedule 13G.

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

See the information contained on the cover pages to this Schedule 13G.

**(ii) Shared power to vote or to direct the vote:**

See the information contained on the cover pages to this Schedule 13G.

**(iii) Sole power to dispose or to direct the disposition of:**

See the information contained on the cover pages to this Schedule 13G.

**(iv) Shared power to dispose or to direct the disposition of:**

See the information contained on the cover pages to this Schedule 13G.

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**ECP ControlCo, LLC**

**Date:** 01/14/2026

**By:** By /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**Energy Capital Partners III, LLC**

**Date:** 01/14/2026

**By:** By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**Energy Capital Partners IV, LLC**

**Date:** 01/14/2026

**By:** By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**ECP Calpine GP, LLC**

**Date:** 01/14/2026

**By:** By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**ECP III Volt Holdings, LLC**

**Date:** 01/14/2026

**By:** By: Energy Capital Partners III, LP, Energy Capital Partners GP III, LP, Energy Capital Partners III, LLC, ECP ControlCo, LLC, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**ECP III-A Volt Holdings, LLC**

**Date:** 01/14/2026

**By:** By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP III-B Volt Holdings, LLC**

**Date:** 01/14/2026

**By:** By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP III-C Volt Holdings, LP**

**Date:** 01/14/2026

**By:** By: ECP III Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP III-D Volt Holdings, LP**

**Date:** 01/14/2026

**By:** By: ECP III Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP Checkerspot Holdings, LP**

**Date:** 01/14/2026

**By:** By: Volt Parent GP, LLC, Energy Capital Partners III, LLC, ECP ControlCo, LLC, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**ECP IV-A Volt Holdings, LP**

**Date:** 01/14/2026

**By:** By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP IV-B Volt Holdings, LP**

**Date:** 01/14/2026

**By:** By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP IV-C Volt Holdings, LP**

**Date:** 01/14/2026

**By:** By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP IV-D Volt Holdings, LP**

**Date:** 01/14/2026

**By:** By: ECP IV Volt Holdings GP, LLC, its general partner, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, Executive Vice President & General Counsel

**ECP Calpine Fund GP, LP**

**Date:** 01/14/2026

**By:** By: ECP Calpine GP, LLC, its general partner, By: ECP ControlCo, LLC, its managing member, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**ECP Calpine Continuation Fund, LP**

**Date:** 01/14/2026

**By:** By: ECP Calpine Fund GP, LP, By: ECP Calpine GP, LLC, By: ECP ControlCo, LLC, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel

**ECP Calpine Rollover Fund, LP**

**Date:** 01/14/2026

**By:** By: ECP Calpine Fund GP, LP, By: ECP Calpine GP, LLC, By: ECP ControlCo, LLC, By: /s/ Jennifer Gray

**Name & Title:** Jennifer Gray, General Counsel