Exhibit 99.18

Disclosure of Transactions in Own Shares

Paris, September 29, 2025 – In accordance with the authorizations given by the shareholders’ general meeting on May 23, 2025, to trade on its shares and pursuant to applicable law on share repurchase, TotalEnergies SE (LEI: 529900S21EQ1BO4ESM68) declares the following purchases of its own shares (FR0000120271) from September 22 to September 26, 2025:

Transaction Date	Total daily volume (number of shares)	Daily weighted average purchase price of shares (EUR/share)	Amount of transactions (EUR)	Market (MIC Code)
22/09/2025	399,580	51.662336	20,643,236.22	XPAR
22/09/2025	186,658	51.695270	9,649,335.71	CEUX
22/09/2025	29,392	51.696225	1,519,455.45	TQEX
22/09/2025	25,706	51.669160	1,328,207.43	AQEU
23/09/2025	606,047	52.399672	31,756,664.02	XPAR
23/09/2025	357,250	52.420198	18,727,115.74	CEUX
23/09/2025	60,000	52.422857	3,145,371.42	TQEX
23/09/2025	30,000	52.311584	1,569,347.52	AQEU
24/09/2025	716,031	53.173122	38,073,603.72	XPAR
24/09/2025	286,525	53.115876	15,219,026.37	CEUX
24/09/2025	66,000	53.241429	3,513,934.31	TQEX
24/09/2025	41,300	53.241556	2,198,876.26	AQEU
25/09/2025	603,009	53.256856	32,114,363.48	XPAR
25/09/2025	301,174	53.254246	16,038,794.28	CEUX
25/09/2025	67,667	53.267973	3,604,483.93	TQEX
25/09/2025	54,112	53.259788	2,881,993.65	AQEU
26/09/2025	570,839	54.066827	30,863,453.46	XPAR
26/09/2025	264,581	54.072714	14,306,612.74	CEUX
26/09/2025	66,089	54.074662	3,573,740.34	TQEX
26/09/2025	43,937	54.070879	2,375,712.21	AQEU
Total	4,775,897	52.995977	253,103,328.25

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

Media Relations: +33 1 47 44 46 99 l mailto:presse@totalenergies.com l @TotalEnergiesPR

Investor Relations: +33 1 47 44 46 46 l ir@totalenergies.com

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Disclaimer:

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

This document may contain forward-looking statements (including forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995), notably with respect to the financial condition, results of operations, business activities and strategy of TotalEnergies. This document may also contain statements regarding the perspectives, objectives, areas of improvement and goals of TotalEnergies, including with respect to climate change and carbon neutrality (net zero emissions). An ambition expresses an outcome desired by TotalEnergies, it being specified that the means to be deployed do not depend solely on TotalEnergies. These forward-looking statements 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”, “aims” or similar terminology. Such forward-looking statements included in this document are based on economic data, estimates and assumptions prepared in a given economic, competitive and regulatory environment and considered to be reasonable by TotalEnergies as of the date of this document.

These forward-looking statements are not historical data and should not be interpreted as assurances that the perspectives, objectives, or goals announced will be achieved. They may prove to be inaccurate in the future, 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 occurrence of risk factors, such as, notably, the price fluctuations in crude oil and natural gas, the evolution of the demand and price of petroleum products, the changes in production results and reserves estimates, the ability to achieve cost reductions and operating efficiencies without unduly disrupting business operations, changes in laws and regulations including those related to the environment and climate, currency fluctuations, technological innovations, meteorological conditions and events, as well as socio-demographic, economic and political developments, changes in market conditions, loss of market share and changes in consumer preferences, or pandemics such as the COVID-19 pandemic. Additionally, certain financial information is based on estimates particularly in the assessment of the recoverable value of assets and potential impairments of assets relating thereto.

Readers are cautioned not to consider forward-looking statements as accurate, but as an expression of the Company’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 or any stakeholder to update or revise, particularly as a result of new information or future events, any forward-looking information or statement, objectives or trends contained in this document. In addition, the Company has not verified, and is under no obligation to verify any third-party data contained in this document or used in the estimates and assumptions or, more generally, forward-looking statements 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 instruments issued by TotalEnergies is provided in the most recent version of the Universal Registration Document which is filed by TotalEnergies SE with the French Autorité des Marchés Financiers and the annual report on Form 20-F filed with the United States Securities and Exchange Commission (“SEC”).

Cautionary Note to U.S. Investors – U.S. investors are urged to consider closely the disclosure in the Form 20-F of TotalEnergies SE, File N° 1-10888, available from us at 2, place Jean Millier – Arche Nord Coupole/Regnault - 92078 Paris-La Défense Cedex, France, or at the Company website totalenergies.com. You can also obtain this form from the SEC by calling 1-800-SEC-0330 or on the SEC’s website sec.gov.