6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

REPORTOF FOREIGN PRIVATE ISSUER

Pursuantto Rule 13a-16 or 15d-16

Underthe Securities Exchange Act of 1934

Forthe month of December 2025

Commission File Number: 001-35829

VermilionEnergy Inc.

(Exact name of registrant as specified in its charter)

3500,520 – 3^rd^ Avenue S.W., Calgary, Alberta T2P 0R3

(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.

Exhibit

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.

VERMILION ENERGY INC.

Date: December 10, 2025

Exhibit 99.1

Vermilion Energy Inc. Hosting Investor Day Today, December 10, 2025

CALGARY, AB, Dec. 10, 2025 /CNW/ - Vermilion Energy Inc. ("Vermilion", "We", "Our", or the "Company") (TSX: VET) (NYSE: VET) is hosting an Investor Day at 9:00 AM MT (11:00 AM ET) today, December 10, 2025. The event will feature presentations by senior management, providing insight into our repositioned global gas portfolio and our outlook for the Company. A live webcast is available for all interested participants and presentation materials have been posted on our website.

Webcast and Dial-In Details

The Investor Day presentation will take place virtually, beginning at 9:00 AM MT (11:00 AM ET). The live webcast can be accessed at https://app.webinar.net/O9BjeG7e3bG. The webcast link and presentation materials are available on Vermilion's website at https://www.vermilionenergy.com/invest-with-us/events-presentations/ under Upcoming Event Details.

Alternatively, participants can call 1-888-510-2154 (Canada and US Toll Free) or 1-437-900-0527 (International and Toronto Area). A recording of the conference call will be available for replay by calling 1-888-660-6345 (Canada and US Toll Free) or 1-289-819-1450 (International and Toronto Area) and using conference replay entry code 11314# from December 10, 2025, at 12:00 PM MT to December 17, 2025, at 12:00 PM MT. To join the conference call without operator assistance, you may register and enter your phone number at https://emportal.ink/4hEWfg4 to receive an instant automated call back.

About Vermilion

Vermilion is a global gas producer that seeks to create value through the acquisition, exploration and development of liquids-rich natural gas in Canada and conventional natural gas in Europe while optimizing low-decline oil assets. This diversified portfolio delivers outsized free cash flow through direct exposure to global commodity prices and enhanced capital allocation optionality.

Vermilion's priorities are health and safety, the environment, and profitability, in that order. Nothing is more important than the safety of the public and those who work with Vermilion, and the protection of the natural surroundings. In addition, the Company emphasizes strategic community investment in each of its operating areas.

Vermilion trades on the Toronto Stock Exchange and the New York Stock Exchange under the symbol VET.

View original content to download multimedia:https://www.prnewswire.com/news-releases/vermilion-energy-inc-hosting-investor-day-today-december-10-2025-302637432.html

SOURCE Vermilion Energy Inc.

View original content to download multimedia: http://www.newswire.ca/en/releases/archive/December2025/10/c5317.html

%CIK: 0001293135

For further information: For further information please contact: Dion Hatcher, President & CEO and/or Lars Glemser, Vice President & CFO, TEL (403) 269-4884 | IR TOLL FREE 1-866-895-8101 | investor_relations@vermilionenergy.com

| www.vermilionenergy.com

CO: Vermilion Energy Inc.

CNW 08:00e 10-DEC-25