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Maviro Catalyst Canada Inc. / International Brotherhood Of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers And Helpers, Local 128

2025–2029 · Construction

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Maxama Protection Inc. / United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union, Local 9597

2021–2024 · Other Services

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MCA Group / Labourers' International Union of North America, Local 183

2025–2028 · Other Services

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MCA Group / Service Employees International Union, Local 2

2025–2028 · Other Services

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Mcmaster University Centre Inc / Labourers' International Union Of North America, Local 837

2022–2026 · Education ? Related Services

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Mcmaster University / International Union Of Operating Engineers, Local 772

2020–2024 · Education ? Related Services

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Mcmaster University / Service Employees International Union, Local 1. Canada

2020–2025 · Education ? Related Services

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McNally Construction Inc. / International Union of Operating Engineers, Local 793

2020–2023 · Construction

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Meadowlands Retirement Community / Labourers' International Union of North America, Local 3000

2023–2025 · Health ? Social Services

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Meadow Park (London) Inc / Ontario Nurses' Association

2024–2026 · Health ? Social Services

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Meaford Long Term Care / Ontario Nurses' Association

2021–2024 · Health ? Social Services

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Meaford Nursing Home Ltd / Ontario Nurses' Association

2024–2026 · Health ? Social Services

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MediPark Lodges Incorporated carrying on business as Valley Park Lodge / Ontario Nurses' Association

2024–2026 · Health ? Social Services

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Messer Canada Inc. / United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union (on behalf of its Local 9042-106)

2026–2028 · Trade and Finance

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Metric Contracting Services Corporation / International Union of Operating Engineers, Local 793

2025–2028 · Construction

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Metro Compactor Services Inc. / Sheet Metal Air Rail Transportation International Association Local 540

2024–2029 · Manufacturing

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Metro Hoisting & Erecting Ltd. / International Union of Operating Engineers, Local 793

2022–2025 · Construction

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Metro Ontario Inc. c.o.b. as Metro Kanata / United Food and Commercial Workers International Union, Local 175

2023–2027 · Trade and Finance

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Metropolitan Home Products Inc. / Labourers' International Union of North America, Local 183

2022–2025 · Construction

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Metropolitan Maintenance a division of 469006 Ontario Inc. / Labourers' International Union of North America, Local 1059

2021–2024 · Other Services

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Metropolitan Maintenance a Division of 469006 Ontario Inc. / Labourers' International Union of North America, Local 1059

2021–2024 · Other Services

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Metropolitan Maintenance A Division of 469006 Ontario Inc. / Labourers' International Union of North America, Local 1059

2025–2028 · Other Services

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Metropolitan Toronto Condominium Corporation # 1137 / Service Employees International Union, Local 2

2023–2026 · Other Services

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Metropolitan Toronto Condominium Corporation No. 638 / Labourers' International Union of North America, LIUNA Local 183

2023–2025 · Other Services

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Metropolitan Toronto Condominium Corporation No. 978 o/a Prominence Point Condos / Labourers' International Union of North America, Local 183

2020–2023 · Other Services

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Metropolitan Wire (Canada) Limited / United Steel, Paper And Forestry, Rubber, Manufacturing, Energy, Allied And Service Workers International Union on behalf of its Local 9042

2018–2023 · Manufacturing

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Mettler-Toledo Inc. / International Association Of Machinists And Aerospace Workers

2020–2023 · Manufacturing

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Mettler-Toledo Inc. / International Association Of Machinists And Aerospace Workers, Local 235

2022–2025 · Trade and Finance

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MHFC Inc. o/a Milton Flooring Gallery / Labourers' International Union of North America, Local 183

2022–2025 · Construction

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Mics Group Of Health Services / Ontario Nurses' Association

2025–2027 · Health ? Social Services

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