| ABA Industriegebiet GmbH | — | 12-156825354631112-98 | |
| Abfallbehandlungsgesellschaft Havelland mbH | — | 12-121096296309909-25 | |
| Abfallentsorgungsverband Schwarze Elster | — | 12-121092720721795-64 | |
| Abwasseranlagen Spremberg GmbH | — | 12-121092720498505-52 | |
| Abwasserentsorgungsgesellschaft Borkwalde mbH | — | 12-121092720503769-71 | |
| Abwasserwerke Baruth GmbH | — | 12-121286756461272-98 | |
| Abwasserzweckverband "Planetal" | — | 12-121092720715283-06 | |
| Abwasserzweckverband "Teupitzsee" | — | 12-121092720721403-76 | |
| Abwasserzweckverband Gerswalde | — | 12-121092720716139-57 | |
| AGUS Akademie für Gesundheits- und Sozialberufe Oberhavel GmbH | — | 12-158199600534912-02 | |
| Ahrensfelde | — | 12-121067334613370-61 | |
| Ahrensfelde | — | — | Offen |
| AKS Aqua-Kommunal-Service GmbH | — | 12-121092720502929-69 | |
| Allgemeine Ortskrankenkasse Nordost | Potsdam | — | Offen |
| Alt Tucheband | — | 12-121014993863478-74 | |
| Alt Tucheband | — | — | Offen |
| Alt Zauche-Wußwerk | — | 12-121067961603499-33 | |
| Alt Zauche-Wußwerk/Stara Niwa-Wózwjerch | — | — | Offen |
| Altdöbern | — | 12-12992262161559-19 | |
| Altdöbern | — | — | Offen |
| Althüttendorf | — | — | Offen |
| Althüttendorf | — | 12-12992262150727-20 | |
| Altlandsberg | — | 12-121038296677972-83 | |
| Altlandsberg, Stadt | — | — | Offen |
| Am Mellensee | — | — | Offen |
| Am Mellensee | — | 12-121014993900460-96 | |
| Amt für Statistik Berlin-Brandenburg | — | 12-121172544280254-40 | |
| Amtsgericht Bad Freienwalde (Oder) | — | 12-121096894453522-25 | |
| Amtsgericht Bad Liebenwerda | — | 12-121096894455134-39 | |
| Amtsgericht Bernau bei Berlin | — | 12-121096894457526-41 | |
| Amtsgericht Brandenburg an der Havel | — | 12-121096894461010-65 | |
| Amtsgericht Cottbus | — | 12-121096894461426-78 | |
| Amtsgericht Eberswalde | — | 12-121096894457682-58 | |
| Amtsgericht Frankfurt (Oder) | — | 12-121096894458618-63 | |
| Amtsgericht Fürstenwalde/Spree | — | 12-121096894454406-89 | |
| Amtsgericht Königs Wusterhausen | — | 12-121096894455082-98 | |
| Amtsgericht Lübben (Spreewald) | — | 12-121096894458254-88 | |
| Amtsgericht Luckenwalde | — | 12-121096894455966-65 | |
| Amtsgericht Nauen | — | 12-121096894459138-55 | |
| Amtsgericht Neuruppin | — | 12-121096894458410-08 | |
| Amtsgericht Oranienburg | — | 12-121096894460334-56 | |
| Amtsgericht Perleberg | — | 12-121096894461754-64 | |
| Amtsgericht Potsdam | — | 12-121096894459606-09 | |
| Amtsgericht Prenzlau | — | 12-121096894458202-50 | |
| Amtsgericht Rathenow | — | 12-121096894461270-61 | |
| Amtsgericht Schwedt /Oder | — | 12-121096894454562-09 | |
| Amtsgericht Senftenberg | — | 12-121096894459970-81 | |
| Amtsgericht Strausberg | — | 12-121096894461166-82 | |
| Amtsgericht Zehdenick | — | 12-121096894455602-90 | |
| Amtsgericht Zossen | — | 12-121096894460386-94 | |