Pennsylvania 1310 Point Street Baltimore Maryland 21231-3380(833)883-0162 Pennsylvania 200 Energy Way Kennett Square Pennsylvania 19348-2473(833)883-0162☐0001868275 0001168165 False 0001868275 2025-01-10 2025-01-10 0001868275 ceg:ConstellationEnergyGenerationLLCMember 2025-01-10 2025-01-10

| UNITED STATES SECURITIES AND EXCHANGE COMMISSION |
| Washington, D.C. 20549 |
| FORM | 8-K |
| CURRENT REPORT |
| Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 |
| January 10, 2025 |
| Date of Report (Date of earliest event reported) |

Commission File Number |  | Name of Registrant; State or Other Jurisdiction of Incorporation; Address of Principal Executive Offices; and Telephone Number |  | IRS Employer Identification Number
001-41137 |  | CONSTELLATION ENERGY CORPORATION |  | 87-1210716
|  | (a Pennsylvania corporation) 1310 Point Street Baltimore, Maryland 21231-3380 (833) 883-0162 |  |
333-85496 |  | CONSTELLATION ENERGY GENERATION, LLC |  | 23-3064219
|  | (a Pennsylvania limited liability company) 200 Energy Way Kennett Square, Pennsylvania 19348-2473 (833) 883-0162 |  |

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:
Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
CONSTELLATION ENERGY CORPORATION: |  |  |  |
Common Stock, without par value |  | CEG |  | The Nasdaq Stock Market LLC

Indicate by check mark whether any of the registrants are emerging growth companies as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐

If an emerging growth company, indicate by check mark if any of the registrants have elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Section 7 - Regulation FD
Item 7.01. Regulation FD Disclosure
On January 10, 2025, Constellation Energy Corporation (Nasdaq: CEG) (“Constellation”) and Calpine Corporation (“Calpine”) issued a joint press release announcing that they have entered into a definitive agreement under which Constellation will acquire Calpine in a cash and stock transaction (the “Transaction”). The press release is attached to this Current Report on Form 8-K as Exhibit 99.1, is incorporated by reference and is being furnished to, but not filed with, the U.S. Securities and Exchange Commission (“SEC”).
Constellation has scheduled a conference call for 8:30 AM ET on January 10, 2025 to discuss the Transaction. To access the call by phone, please follow the registration link available on the Investor Relations page of Constellation’s website: https://investors.constellationenergy.com. The call will also be webcast and archived on the Investor Relations page of Constellation’s website. Media representatives are invited to participate on a listen-only basis. The materials being presented on the call are attached as Exhibit 99.2, are incorporated by reference and are being furnished to, but not filed with, the SEC.
The information required by Item 1.01, including a copy of the definitive agreement relating to the Transaction, will be filed in a separate Current Report on Form 8-K.
Section 9 – Financial Statements and Exhibits
Item 9.01. Financial Statements and Exhibits
(d) Exhibits.

Exhibit No. |  | Description
99.1 |  | Press release
99.2 |  | Investor presentation
101 |  | Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.
104 |  | The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.

* * * * *
This combined Current Report on Form 8-K is being furnished separately by Constellation Energy Corporation and Constellation Energy Generation, LLC (collectively, the “Registrants”). Information contained herein relating to any individual Registrant has been furnished by such Registrant on its own behalf. Neither Registrant makes any representation as to information relating to the other Registrant.
This Current Report on Form 8-K contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks and uncertainties. Words such as “could,” “may,” “expects,” “anticipates,” “will,” “targets,” “goals,” “projects,” “intends,” “plans,” “believes,” “seeks,” “estimates,” “predicts,” and variations on such words, and similar expressions that reflect the Registrants’ current views with respect to future events and operational, economic, and financial performance, are intended to identify such forward-looking statements. These forward-looking statements include, but are not limited to, statements regarding the proposed transaction between Constellation and Calpine, the expected closing of the proposed transaction and the timing thereof, the financing of the proposed transaction and the pro forma combined company and its operations, strategies and plans, enhancements to investment-grade credit profile, synergies, opportunities and anticipated future performance and capital structure, and expected accretion to earnings per share and free cash flow. Information adjusted for the proposed transaction should not be considered a forecast of future results. Although the Registrants believe these forward-looking statements are reasonable, statements made regarding future results are not guarantees of future performance and are subject to numerous assumptions, uncertainties and risks that are difficult to predict. Forward-looking statements are based on current expectations, estimates and assumptions that involve a number of risks and uncertainties that could cause actual results to differ materially from those projected.
Actual outcomes and results may differ materially from the results stated or implied in the forward-looking statements included in this Current Report on Form 8-K due to a number of factors, including, but not limited to: the occurrence of any event, change or other circumstances that could give rise to the termination of the merger agreement; the risk that Constellation or Calpine may be unable to obtain governmental and regulatory approvals required for the proposed transaction, or required governmental and regulatory approvals may delay the proposed transaction or result in the imposition of conditions that could cause the parties to abandon the proposed transaction; the risk that the parties may not be able to satisfy the conditions to the proposed transaction in a timely manner or at all; the risk

that problems may arise in successfully integrating the businesses of the companies, which may result in the combined company not operating as effectively and efficiently as expected; and the risk that the combined company may be unable to achieve synergies or other anticipated benefits of the proposed transaction or it may take longer than expected to achieve those synergies or benefits. Other unpredictable or unknown factors not discussed in this Current Report on Form 8-K could also have material adverse effects on forward-looking statements.
The factors that could cause actual results to differ materially from the forward-looking statements made by the Registrants include those factors discussed herein, as well as the items discussed in (1) the Registrants' 2023 Annual Report on Form 10-K in (a) Part I, ITEM 1A. Risk Factors, (b) Part II, ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations, and (c) Part II, ITEM 8. Financial Statements and Supplementary Data: Note 19, Commitments and Contingencies; (2) the Registrants' Third Quarter 2024 Quarterly Report on Form 10-Q in (a) Part II, ITEM 1A. Risk Factors, (b) Part I, ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations, and (c) Part I, ITEM 1. Financial Statements: Note 13, Commitments and Contingencies; and (3) other factors discussed in filings with the SEC by the Registrants.
Investors are cautioned not to place undue reliance on these forward-looking statements, whether written or oral, which apply only as of the date of this Current Report on Form 8-K. Neither Registrant undertakes any obligation to publicly release any revision to its forward-looking statements to reflect events or circumstances after the date of this Current Report on Form 8-K.

SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, each Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| CONSTELLATION ENERGY CORPORATION
| /s/ Daniel L. Eggers
| Daniel L. Eggers
| Executive Vice President and Chief Financial Officer
| CONSTELLATION ENERGY GENERATION, LLC
| /s/ Daniel L. Eggers
| Daniel L. Eggers
| Executive Vice President and Chief Financial Officer

January 10, 2025

EXHIBIT INDEX

Exhibit No. |  | Description
99.1 |  | Press release
99.2 |  | Investor presentation
101 |  | Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.
104 |  | The cover page from this Current Report on Form 8-K, formatted as Inline XBRL.