The Ontario Sires Stakes (OSS) program is now accepting 2026 stallion registrations.

Those wishing to register a stallion with the OSS program for 2026 can do so by filling out the online stallion registration form, available on the OSS website by clicking here. For those wishing to submit a paper copy, a PDF version of the application form can be downloaded from OSS by clicking here.

If you require assistance, contact the OSS Program Coordinator, Christina Saftic, by calling 416-407-4841 or emailing [email protected].

Please note that stallions must be registered with the program prior to any mare(s) being bred to be eligible for OSS57.

The stallion registration deadline is Thursday, Jan. 15, 2026.

(With files from Ontario Racing)