Bedrift M - Mosterhamn
- Møllevik AS
- Moongroove AS
- Mapcon AS
- Møyro AS
- Manacon AS
- Maok Lidal
- Moster Maskin AS
- Moster Holding AS
- Moster Båtlag
- Moster Elektro AS
- Moster Amfi
- Moster Amfi AS
- Moster Indremisjon
- Moster Ungdomsklubb
- Moster Håndverksted
- Myro Mek AS
- Mosterhamn Veteranbåtlag
- Moster Drill
- Moster Hårdesign AS
- Mostrahuset Totland
- Moster Skulekorps
- Moster Sogelag
- Moster Eiendom AS
- Moster Båtlag
- Moster Idrettslag
- Mosterhamn Veteranbåtlag
- Mosterhamn Legekontor
- Morten Ersland
- Mats Mæland
- Moster Rør AS
- Moster 2024 AS
- Moster Legekontor
- Morten Aunrønning
- Martins Dainis
- Moster skule
- Marik Holding AS
- Moster Grendapark
- Moster Grendautval
- Michael Deegan McGurk
- Moster Cafe AS Konkursbo
- Moster Cafe AS Konkursbo
- Moster Skule SFO
- Moster Elektro Velferdsklubb
- Moster Bil AS (SjekkPunkt)
- Moster Bmx Klubb
- Martin Lønning Invest AS
- Miracle Connect Norge
- Miracle Connect Norge
- Moster Treningsstudio Kristoffer Mæland
- Miljøpartiet Dei Grøne Bømlo
- Mosterhamn Post i Butikk