6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF

THE SECURITIES EXCHANGE ACT OF 1934

April 29^th^, 2026

Commission File Number 001-10888

TotalEnergies SE

(Translation of registrant’s name intoEnglish)

2, place Jean Millier

La Défense 6

92400 Courbevoie

France

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  x        Form 40-F  ¨

On April 29, 2026, TotalEnergies SE (the “Company”) issued a press release announcing the completion of its previously announced acquisition of 50% of Energetický a průmyslový holding (“EPH”) flexible power generation platform in Western Europe and the issuance to EPH of around 95.4 million ordinary shares of the Company in consideration for the acquisition. The shares are issued in reliance on Regulation S under the Securities Act of 1933, as amended. The press release is furnished herewith as Exhibit 99.1.

The information in this current report on Form 6-K (other than Exhibit 99.1 hereto) shall be deemed to be incorporated by reference into the Registration Statement on Form F-3 (Nos. 333-278983, 333-278983-01, 333-278983-02, 333-278983-03 and 333-278983-04), as amended, of TotalEnergies SE, TotalEnergies Capital International, TotalEnergies Capital USA LLC. and TotalEnergies Capital and the Registration Statement on Form S-8 (Nos. 333-286845 and 333-280516) of TotalEnergies SE, and to be part thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

This communication is for information purposesonly and does not constitute an offer to sell or a solicitation of an offer to buy any securities. Any securities referred to herein havenot been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States except pursuantto an applicable exemption from registration requirements.

EXHIBIT INDEX

SIGNATURES

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

Exhibit 99.1

Europe: TotalEnergies finalizes the acquisitionof 50% of a

portfolio of flexible power generation assets from EPH

Paris,April 29, 2026 – TotalEnergies announces the completion of the acquisition agreed on 16 November 2025 of 50% ofEPH’s flexible power generation platform in Western Europe*. Approved by all competent authorities and by the Boards of Directorsof both TotalEnergies and EPH, this transaction leads to the creation of* TTEP, the 2^nd^ largest flexgen playerin Europe, headquartered in Amsterdam.

The company, TTEP, owns and operates, through its subsidiaries, flexible natural gas and biomass-based power plants and BESS assets across Italy, the **United Kingdom, Ireland,**the Netherlands and France, for a total capacity of 14 GW installed or in construction. Its production reached close to 30 TWh of electricity in 2025.

TotalEnergies and EPH have agreed on tolling contracts with TTEP, allowing both partners to market their own share of production. Furthermore, TTEP has a 5 GW projects portfolio and will serve as the preferred investment vehicle for both shareholders to develop their flexible power generation activities and large-scale battery storage solutions across the five countries concerned.

The transaction becomes effective on April 29,2026. Pursuant to the powers delegated to it by the Shareholders’ Meeting of May 24, 2024, the TotalEnergies SE Board of Directorshas approved the issuance of around 95.4 million shares to EPH, representing approximately 4.2% of TotalEnergies’ share capital,making EPH one of the Company’s main shareholders.

***

About TotalEnergies

TotalEnergies is a global integrated energy company that produces and markets energies: oil and biofuels, natural gas, biogas and low-carbon hydrogen, renewables and electricity. Our more than 100,000 employees are committed to provide as many people as possible with energy that is more reliable, more affordable and more sustainable. Active in about 120 countries, TotalEnergies places sustainability at the heart of its strategy, its projects and its operations.

TotalEnergies Contacts

MediaRelations:+33 (0)1 47 44 46 99l presse@totalenergies.com l @TotalEnergiesPR

InvestorRelations: +33 (0)1 47 44 46 46 l ir@totalenergies.com

Cautionary Note

Theterms “TotalEnergies”, “TotalEnergies company” or “Company” in this document are used to designateTotalEnergies SE and the consolidated entities that are directly or indirectly controlled by TotalEnergies SE. Likewise, the words “we”, “us” and “our” may also be used to refer to these entities or to their employees. The entities in which TotalEnergiesSE directly or indirectly owns a shareholding are separate legal entities. This

document may contain forward-looking information and statements*(including forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995), notablywith respect to the anticipated production, capacity and future development of the assets of the joint venture. These forward-lookingstatements may generally be identified by the use of the future or conditional tense or forward-looking words such as “will”, “should”, “could”, “would”, “may”, “likely”, “might”, “envisions”, “intends”, “anticipates”, “believes”, “considers”, “plans”, “expects”, “thinks”, “targets”, “commits”, “aims” or similar terminology. Such forward-looking statementsincluded in this document are based on a number of economic data, estimates and assumptions prepared in a given economic, competitiveand regulatory environment and considered to be reasonable by TotalEnergies as of the date of this document. These forward-looking statementsare not historical data and should not be interpreted as assurances that the perspectives, objectives or goals announced will be achieved.They are uncertain and may evolve or be modified with a significant difference between the actual results and those initially estimated,due to the uncertainties notably related to the economic, financial, competitive and regulatory environment, or due to the occurrenceof risk factors described from time to time in the Company’s regulatory filings, including its Universal Registration Document filedwith the French Autorité des Marchés Financiers, its Annual Report on Form 20 F filed with the United States Securitiesand Exchange Commission (“SEC”) and its other reports filed or furnished with the SEC. Readers are cautioned not to considerforward-looking statements as certain, but as an expression of the Corporation’s views only as of the date this document is published.TotalEnergies SE and its subsidiaries have no obligation, make no commitment and expressly disclaim any responsibility to investors orany stakeholder to update or revise, particularly as a result of new information or future events, any forward-looking information orstatement, objectives or trends contained in this document. In addition, the Corporation has not verified, and is under no obligationto verify any third-party data contained in this document or used in the estimates and assumptions or, more generally, forward-lookingstatements published in this document. The information on risk factors that could have a significant adverse effect on TotalEnergies’business, financial condition, including its operating income and cash flow, reputation, outlook or the value of financial instrumentsissued by TotalEnergies is provided in the most recent version of the Universal Registration Document which is filed by TotalEnergiesSE with the French Autorité des Marchés Financiers and the annual report on Form 20-F filed with the SEC.*

Important Note

This press release is for information purposesonly and does not constitute an offer to sell or a solicitation of an offer to buy any securities. Any securities referred to herein havenot been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States except pursuantto an applicable exemption from registration requirements.