- M&G Luxembourg SA
- M&G Securities Limited
- Macquarie Investment Management Austria Kapitalanlage AG
- MainFirst Affiliated Fund Managers SA
- Man Asset Management (Ireland) Limited
- Man Fund Management Netherlands BV
- Mandarine Gestion
- MASTERINVEST Kapitalanlage GmbH
- Matthews Asia Funds
- MDO Management Company SA
- MEAG Luxembourg S.à r.I.
- MEAG Luxembourg Sàrl
- MEAG MUNICH ERGO KAG mbH
- Mediolanum International Funds Limited
- Mercer Global Investments Management Ltd
- Metropole Gestion
- Metzler Asset Management GmbH
- Metzler Ireland Limited
- MFS Investment Management Company (Lux) SARL
- Mint Tower Capital B.V.
- Mirabaud Asset Management (Europe) SA
- MK LUXINVEST S.A.
- Monega KAG mbH
- Montanaro Asset Management Ltd
- Montlake Management Limited
- Morgan Stanley Real Estate Investment GmbH
- MORI CAPITAL MANAGEMENT LIMITED
- Moventum Asset Management SA
- MSIM Fund Management (Ireland) Limited
- MultiConcept Fund Management SA
- Muzinich & Co. (Ireland) Limited
