- M&G Investment Management Limited
- M&G Luxembourg SA
- M&G Securities Limited
- Macquarie Asset Management
- Macquarie Investment Management Austria Kapitalanlage AG
- Madison Asset Management, LLC
- Madison Avenue Financial Solutions, LLC
- MAITICE GESTION
- Man Asset Management (Ireland) Limited
- Mandarine Gestion
- Mandatum Fund Management S.A.
- Manulife Investment Management
- MASTERINVEST Kapitalanlage GmbH
- Matrix Asset Advisors, Inc.
- Matthews International Capital Management, LLC
- MC Square S.A.
- MC Vermögensmanagement AG
- MEAG MUNICH ERGO KAG mbH
- Mediobanca Management Company S.A.
- Mediolanum International Funds Limited
- Melanion Capital SAS
- Mercer Global Investments Management Ltd
- Metzler Asset Management GmbH
- MFS
- MFS Investment Management Company (Lux) SARL
- Miller Value Partners, LLC
- Mint Tower Capital B.V.
- Mirabaud Asset Management (Europe) SA
- Mirova
- MONCEAU Investment Solutions
- Monega KAG mbH
- MONTAIGNE CAPITAL
- Morgan Stanley Investment Management Inc.
- MORI CAPITAL MANAGEMENT LIMITED
- Motley Fool Asset Management, LLC
- Moventum Asset Management SA
- MSIM Fund Management (Ireland) Limited
- Muzinich & Co. (Ireland) Limited
- MW GESTION
- Myria Asset Management
