Landlords in Munich
This overview shows 36 landlords in Munich who rent out flats directly, and 67 student residences.

If you are not in a hurry, look at housing cooperatives, even though many are not taking anyone from outside at the moment. If you need a flat soon, your chances are better with private housing companies, because their listings change quickly. If you can get a registration notice (Registrierungsbescheid) from the city, the municipal and state housing companies are especially interesting, because the city lets some of their flats through SOWON.
Housing companies owned by the City of Munich or the Free State of Bavaria. The city lets some of their flats through SOWON, to households with a registration notice (Registrierungsbescheid).
Private housing companies that rent out their own flats. They list them on their own websites or on the portals.
At a housing cooperative you become a member and buy shares. In return you get a permanent rental contract: nobody can end it to move in themselves (Eigenbedarf).
Houses where only or mainly students live, from the Studierendenwerk to private apartment buildings.