OMERS has reciprocal transfer agreements with the following pension plans:
- British Columbia Municipal Pension Plan
- British Columbia Public Service Pension Plan
- City of Winnipeg
- Commission administrative des regimes de retraite et d'assurances
- Electrical Safety Authority Pension Plan
- Federal Superannuation Fund
- Halifax Regional Municipality Pension Plan
- Healthcare of Ontario Pension Plan
- Hydro One Pension Plan
- Independent Electricity System Operator Pension Plan
- Manitoba Municipal Employees Pension Plan
- Newfoundland and Labrador Public Service Pension Plan
- Northern Employees Benefit Services Pension Plan
- Ontario Institute for Studies in Education Pension Plan
- Ontario Power Generation Inc. Pension Plan
- Ontario Public Service Pension Plan (Ontario Pension Board)
- Ontario Teachers' Pension Plan
- OPSEU Pension Trust (OPTrust)
- OPSEU Staff Pension Fund
- Providence Centre Pension Plan
- St. Joseph's Health Centre Pension Plan
- St. Michael's Hospital Pension Plan
- Ville de Laval Pension Plan
- Ville de Hull Pension Plan
- Workplace Safety and Insurance Board Employees' Pension Plan