| 27391 | Switzerland | Lutz | Bodenmüller AG | Steinwiesenstrasse 10, 8222 Beringen | +41 52 6851821 | www.solarlutz.ch | | |
| 27392 | Switzerland | LWS Wärmeservice GmbH | Ringstrasse 39, CH-4106, Therwil | +41 61 7331808 | www.waermeservice.ch | | |
| 27393 | Switzerland | Maag & Wetli AG | Albisstrasse 19, 8915 Hausen am Albis | +41 44 7642525 | https://www.maag-wetli.ch | | |
| 27394 | Switzerland | Magtechnique Sarl | Rue de l'Avenir 4, 2852 Courtételle | +41 32 4221911 | magtechnique.ch | | |
| 27395 | Switzerland | Mark Holzbau AG | Tur 6, 7412 Scharans | +41 81 6511719 | www.markholzbau.ch | | |
| 27396 | Switzerland | Marquart Elektroplanung+Beratung AG | St. Gallerstrasse 68, 9470, Buchs SG | +41 58 7500050 | www.maq.ch | | |
| 27397 | Switzerland | Marquart Dächer Fassadenbau AG | Gewerbestrasse 9, 8881 Tscherlach | +41 81 7351346 | https://marquart-dach.ch | | |
| 27398 | Switzerland | Marti Elektrische Anlagen AG | Kirchgasse 4, CH-3303 Jegenstorf | +41 31 7636363 | https://marti-el.ch | | |
| 27399 | Switzerland | Marti Energietechnik | Lägernstrasse 27, 8037 Zürich | +41 44 7903654 | www.martienergie.ch | | |
| 27400 | Switzerland | Maugweiler Sanitär AG | Tobeläckerstrasse 4, CH-8212 Neuhausen am Rheinfall | +41 52 6755100 | maugweiler.ch | | |
| 27401 | Switzerland | Max Schüpbach AG | Alpenstrasse 4, 3432, Lützelflüh | +41 34 4601313 | https://www.maxschuepbachag.ch | | |
| 27402 | Switzerland | MBRsolar AG | Frauenfelderstr. 12, CH-9545 Wängi | +41 52 3695070 | www.mbrsolar.ch | | |
| 27403 | Switzerland | MCR-e Sàrl | Route de Fontaines 3, 1423 Villars-Burquin | +41 24 5520900 | mcr-e.ch | | |
| 27404 | Switzerland | Meeco AG | Industriestrasse 16, 6300 Zug | +41 41 7105171 | www.meeco.net | | |
| 27405 | Switzerland | Menegardi AG | Sonnenwiesenstrasse 14, 8280 Kreuzlingen | +41 71 6800550 | www.menegardiag.ch | | |
| 27406 | Switzerland | MG Electricite Sàrl | Avenue de la Gare 8, 1964 Conthey | +41 848 111222 | www.electro-romandie.ch | | |
| 27407 | Switzerland | Mons Solar AG | Gewerbestrasse 3, CH-9444 Diepoldsau | +41 71 7758900 | www.monssolar.ch | | |
| 27408 | Switzerland | Morisset & Partner AG | Badenweilerstrasse 34, 4057 Basel | +41 61 3831326 | www.morisset-partner.ch | | |
| 27409 | Switzerland | Mösch AG | Landstrasse 15, 5073, Gipf-Oberfrick | +41 62 8651700 | www.möschag.ch | | |
| 27410 | Switzerland | MSP Construction AG | Bahnhofstrasse 17, 6403, Küssnacht am Rigi | +41 41 8177233 | https://www.msp.swiss | | |
| 27411 | Switzerland | Müller Polybau AG | Freimettigenstrasse 17, 3510 Konolfingen | +41 31 7912055 | www.mueller-polybau.ch | | |
| 27412 | Switzerland | Muller Toitures Sàrl | Chemin de la Buanderie 11, 1852 Roche | +41 21 9602666 | https://www.mullertoitures.ch | | |
| 27413 | Switzerland | Foundation Myclimate | Pfingstweidstrasse 10, 8005 Zürich | +41 44 5004350 | www.myclimate.org | | |
| 27414 | Switzerland | NAU Solar Systemtechnik GmbH | Felsenaustrasse 5, 7000 Chur | +41 81 2527212 | www.nau-gmbh.ch | | |
| 27415 | Switzerland | Neue Energien May | Badstrasse 9, CH-4573 Lohn-Ammannsegg | +41 32 6770650 | www.neue-energien-may.ch | | |
| 27416 | Switzerland | O. Kohler AG | Brühlmattenstrasse 18, 5525 Fischbach-Göslikon | +41 56 6229436 | https://kohler-ag.ch | | |
| 27417 | Switzerland | Oberhänsli AG | Bergstrasse 2, CH-9606 Bütschwil | +41 71 9828484 | www.oberhaensliag.ch | | |
| 27418 | Switzerland | P. Blaser Bedachungen und Fassaden AG | Poststrasse 13, 5707 Seengen/AG | +41 62 7772849 | www.blaser-bedachungen.ch | | |
| 27419 | Switzerland | P. Wolf AG Electrical Installations | Bordacherstrasse 39, 8108 Dällikon ZH | +41 44 8440363 | www.elektro-wolf.ch | | |
| 27420 | Switzerland | Panotron AG | Ziegelei 8, 3255 Rapperswil BE | +41 31 8796540 | www.panotron.com | | |