6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

REPORTOF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 21, 2026

Commission File Number: 000-55539

TRILLIONENERGY INTERNATIONAL INC.

(Translation of registrant’s name into English)

Suite700, 838 West Hastings StreetVancouver, BC, V6C 0A6(Address of principal executive offices)

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

☒ Form 20-F   ☐ Form 40-F

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

On April 21, 2026, Trillion Energy International Inc. issued the news release filed herewith as Exhibit 99.1, to ring the opening bell at the CSE exchange and updates on corporate events.

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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.

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Exhibit 99.1

TrillionEnergy to Ring Opening Bell at the Canadian Securities Exchange; Updates on Corporate Events

April21, 2026 – Vancouver, B.C. – Trillion Energy International Inc. (“Trillion” or the “Company”) (CSE: TCF) (OTCQB: TRLEF) (Frankfurt: Z62) is pleased to announce that it has been invited to ring the Opening Bell at the Canadian Securities Exchange (the “CSE”) for Thursday, April 23, 2026 - marking the Company’s five year anniversary on the exchange. The ceremony will take place at 9:30 a.m. ET and will be broadcast on the Company’s and the CSE’s official social media channels.

“Ringingthe Opening Bell at the CSE marks an exciting turning point for Trillion,” said Scott Lower, President of Trillion Energy. “Over the past several months, we have repositioned the Company around a single focused asset, our 29% earn-in interest in theM47 oil exploration block in southeastern Türkiye, divesting our legacy natural gas interests and completing an independent NI 51-101resource evaluation of the M47 block. We are pleased to share this milestone with our shareholders and the broader investment community.”

ShareConsolidation Effective Date

Further to the Company’s news release dated April 17, 2026, the Company confirms that its previously announced 5:1 consolidation of its issued and outstanding common shares (the “Consolidation”) will take effect at the open of markets on Friday, April24, 2026.

When the Consolidation is put into effect, a total of approximately 41,624,457 post-Consolidation Common Shares will be issued and outstanding, assuming there are no other changes in the issued capital of the Company. The aggregate number of Common Shares held by such holder will be rounded down to the nearest whole Common Share. All outstanding convertible instruments (including debentures, options and warrants) will be adjusted on the equivalent ratio. The CSE trading symbol will continue as “TCF” with a new CUSIP 89624B500 / ISIN CA89624B5009. The Company’s OTCQB symbol will temporarily change to “TRLED” for 20 trading days, after which it is expected to revert to “TRLEF”.

Registered shareholders will receive a letter of transmittal from the Company’s transfer agent, Odyssey Trust Company, with instructions regarding exchanging share certificates. Shares held in book-entry form through a broker or other intermediary will be adjusted automatically. Shareholders with questions regarding the Consolidation are encouraged to contact their broker or Odyssey Trust Company directly.

AboutTrillion Energy International Inc.

Trillion Energy International Inc. is a Canadian oil exploration company focused on Türkiye. The Company has an agreement to earn a 29% working interest in the M47 oil exploration block (C3 and C4 licences) located in the Cudi-Gabar petroleum province of Southeastern Türkiye. The earn-in includes funding a total of US$15 million for 2026 and 2027 work commitments. More information may be found on www.sedarplus.ca and on the Company’s website at www.trillionenergy.com.

Requests for further information should be directed to:

Scott Lower, President

Trillion Energy International Inc.

Suite 700, 838 West Hastings Street

Vancouver, B.C., V6C 0A6

Corporate offices: 1-778-819-1585

e-mail: info@trillionenergy.com

Website: www.trillionenergy.com

CautionaryStatement Regarding Forward-Looking Information

Thisnews release contains “forward-looking information” within the meaning of applicable Canadian securities laws, includingbut not limited to: statements regarding the bell-ringing ceremony date, time and format; the Company’s strategic direction andfocus on the M47 Concession; the Company’s earn-in obligations and work program commitments; and the business and affairs of theCompany generally. Forward-looking information is based on a number of assumptions including, without limitation: the availability ofthe CSE venue and livestream; JOC partner approvals; prevailing oil prices and foreign exchange rates; access to capital; and the availabilityof required services and equipment. Forward-looking information is subject to known and unknown risks, uncertainties and other factors,many of which are beyond the Company’s control, that may cause actual results to differ materially, including: commodity pricerisk; drilling and operational risk; regulatory risk in Türkiye; JOC partner risk; access to financing; and currency risk. Readersare cautioned not to place undue reliance on forward-looking information. The forward-looking information contained in this news releaseis made as of the date hereof and the Company disclaims any obligation to update any forward-looking information, whether as a resultof new information, future events or results or otherwise, except as expressly required by applicable securities law.

*Neitherthe Canadian Securities Exchange nor its regulation services provider accepts responsibility for the adequacy or accuracy of this newsrelease.*