Stu Sells Oakville Tankard

The Stu Sells Oakville Tankard (also known as the OCT Championships) is an annual bonspiel on the men's and women's Ontario Curling Tour. Except for in 2020, the event has been held at the Oakville Curling Club in Oakville, Ontario. The event was formerly just on the Ontario Curling Tour, but it was promoted as a World Curling Tour event in 2013 when Stu Sells became the sponsor.

As of 2023, the purse for the event is $30,000 for the men's event and $21,000 for the women's events. A Tier 2 men's event was added in 2016 (but was discontinued), with a total purse of $16,000.

In 2020, the event was held at the KW Granite Club in Waterloo, Ontario, due to the COVID-19 pandemic delaying the opening of the Oakville Curling Club. That year, the men's event was halted before the playoffs, as one player was notified through a COVID Alert tracing app that he had come in contact with someone who had the virus. The women's playoff was held, however, as the men's and women's teams did not play at the same time.

The event was postponed and eventually cancelled in 2022 to avoid conflicting with the 2022 PointsBet Invitational.