| $350,000–1 million | MAIZ HOLDING COMPANY | BERKELEY, CA | Mechanics Bank |
| $350,000–1 million | MAL WARWICK & ASSOCIATES, INC. | BERKELEY, CA | Mechanics Bank |
| $150,000–350,000 | MAMAS MEATBALL & MISTURA RESTAURANT | SAN LUIS OBISPO, CA | Mechanics Bank |
| $150,000–350,000 | MANCEBO HOLSTEINS, LP | TULARE, CA | Mechanics Bank |
| $350,000–1 million | MANCHESTER FARMS INC | COLUMBIA, SC | Mechanics Bank |
| $350,000–1 million | MANCHESTER FARMS INC. | Columbia, SC | Mechanics Bank |
| $1–2 million | MANSFIELD ENGINEERED COMPONENTS INC. | Mansfield, OH | Mechanics Bank |
| $1–2 million | MANSFIELD ENGINEERED COMPONENTS, INC | MANSFIELD, OH | Mechanics Bank |
| $350,000–1 million | MANSFIELD MEMORIAL HOMES | MANSFIELD, OH | Mechanics Bank |
| $150,000–350,000 | MANUEL PEREA TRUCKING INC | GONZALES, CA | Mechanics Bank |
| $150,000–350,000 | MANUEL PEREA TRUCKING INC | Gonzales, CA | Mechanics Bank |
| $150,000–350,000 | MANZANOS HARVESTING, INC. | EL CENTRO, CA | Mechanics Bank |
| $150,000–350,000 | MANZO CONSTRUCTION INC | Hollister, CA | Mechanics Bank |
| $150,000–350,000 | MANZO CONSTRUCTION INCORPORATED | HOLLISTER, CA | Mechanics Bank |
| $150,000–350,000 | MARANATHA GARDENING & LANDSCAPE INC. | BAKERSFIELD, CA | Mechanics Bank |
| $150,000–350,000 | MARANATHA PETROLEUM INC. | Bakersfield, CA | Mechanics Bank |
| $1–2 million | MARE ISLAND DRY DOCK LLC | VALLEJO, CA | Mechanics Bank |
| $350,000–1 million | MARIN BAKING LLC | SAN RAFAEL, CA | Mechanics Bank |
| $350,000–1 million | MARIN BAKING LLC | San Rafael, CA | Mechanics Bank |
| $350,000–1 million | MARIN RECYCLING AND RESOURCE RECOVERY ASSOCIATION | SAN RAFAEL, CA | Mechanics Bank |
| $2–5 million | MARIN SANITARY SERVICE | SAN RAFAEL, CA | Mechanics Bank |
| $150,000–350,000 | MARIPOSA PALM CANYON INC | PALM SPRINGS, CA | Mechanics Bank |
| $150,000–350,000 | MARIPOSA PALM CANYON INC. | Palm Springs, CA | Mechanics Bank |
| $350,000–1 million | MARK ANTONY HISTORIC PROPERTY LLC | ASHLAND, OR | Mechanics Bank |
| $150,000–350,000 | MARK J POWERS INC DBA SERVPRO OF SANTA MARIA | Santa Maria, CA | Mechanics Bank |
| $2–5 million | MARK SCOTT CONSTRUCTION INC. | Pleasant Hill, CA | Mechanics Bank |
| $2–5 million | MARK SCOTT CONSTRUCTION, INC. | PLEASANT HILL, CA | Mechanics Bank |
| $150,000–350,000 | MARKARIAN AG SERVICES INC | FRESNO, CA | Mechanics Bank |
| $350,000–1 million | MARKON COOPERATIVE | SALINAS, CA | Mechanics Bank |
| $1–2 million | MARKON COOPERATIVE INC | Salinas, CA | Mechanics Bank |
| $150,000–350,000 | MART & RAF, INC | MERCED, CA | Mechanics Bank |
| $150,000–350,000 | MARTIN SIGN CO. INC. | San Francisco, CA | Mechanics Bank |
| $150,000–350,000 | MARTIN SIGN CO., INC. | San Francisco, CA | Mechanics Bank |
| $350,000–1 million | MARVIN COLLINS CONSTRUCTION | HERCULES, CA | Mechanics Bank |
| $350,000–1 million | MARX ENTERPRISE INC | OJAI, CA | Mechanics Bank |
| $150,000–350,000 | MARX TOWING INC. | Gilroy, CA | Mechanics Bank |
| $150,000–350,000 | MARX TOWING, INC. | Gilroy, CA | Mechanics Bank |
| $150,000–350,000 | MASON TILLMAN ASSOCIATES LTD | Oakland, CA | Mechanics Bank |
| $150,000–350,000 | MASON TILLMAN ASSOCIATES, LTD | OAKLAND, CA | Mechanics Bank |
| $1–2 million | MATERRA LLC | Bakersfield, CA | Mechanics Bank |
| $1–2 million | MATERRA LLC | BAKERSFIELD, CA | Mechanics Bank |
| $150,000–350,000 | MATTHEWS, HUTTON & WARREN, CPAS | PARADISE, CA | Mechanics Bank |
| $1–2 million | MATTHIAS VILLEGAS JR FLC | GONZALES, CA | Mechanics Bank |
| $150,000–350,000 | MAVERICK TIRE SUPPLY, INC. | PITTSBURG, CA | Mechanics Bank |
| $150,000–350,000 | MAVERICKS CATERING INC | CONCORD, CA | Mechanics Bank |
| $350,000–1 million | MAX'S SF OPERA CAFE INC. | San Francisco, CA | Mechanics Bank |
| $150,000–350,000 | MAX'S SF OPERA CAFE, INC. | San Francisco, CA | Mechanics Bank |
| $150,000–350,000 | MAYBECK HIGH SCHOOL | BERKELEY, CA | Mechanics Bank |
| $150,000–350,000 | MCABEE TRUCKING, INC. | HOLLISTER, CA | Mechanics Bank |
| $1–2 million | MCCAMPBELL ANALYTICAL INC | PITTSBURG, CA | Mechanics Bank |
| $150,000–350,000 | MCCONNELL'S FINE ICE CREAMS LLC | SANTA BARBARA, CA | Mechanics Bank |
| $350,000–1 million | MCG SERVICES CORPORATION | San Rafael, CA | Mechanics Bank |
| $350,000–1 million | MCG SERVICES CORPORATION | SAN RAFAEL, CA | Mechanics Bank |
| $350,000–1 million | MCK ENTERPRISES | OXNARD, CA | Mechanics Bank |
| $350,000–1 million | MCK ENTERPRISES INC DBA VALLEY SPUDS | Oxnard, CA | Mechanics Bank |
| $150,000–350,000 | MCMILLAN STUDY GUIDES INC. | San Luis Obispo, CA | Mechanics Bank |
| $150,000–350,000 | MCMILLAN STUDY GUIDES, INC | SAN LUIS OBISPO, CA | Mechanics Bank |
| $150,000–350,000 | MD MANOUEL INSURANCE AGENCY, INC | FRESNO, CA | Mechanics Bank |
| $350,000–1 million | MEDIAJEL INC | Walnut Creek, CA | Mechanics Bank |
| $350,000–1 million | MEDIAJEL, INC. | WALNUT CREEK, CA | Mechanics Bank |
| $350,000–1 million | MEDIALOCATE INC | Pacific Grove, CA | Mechanics Bank |
| $350,000–1 million | MEDIALOCATE, INC | PACIFIC GROVE, CA | Mechanics Bank |
| $2–5 million | MEE MEMORIAL HOSPITAL | KING CITY, CA | Mechanics Bank |
| $350,000–1 million | MEGABYTE SYSTEMS, INC. | Rocklin, CA | Mechanics Bank |
| $350,000–1 million | MELIA HOMES INC | IRVINE, CA | Mechanics Bank |
| $350,000–1 million | MELIN ENTERPRISES INC. | Merced, CA | Mechanics Bank |
| $350,000–1 million | MELIN ENTERPRISES, INC. | MERCED, CA | Mechanics Bank |
| $350,000–1 million | MELLEMA DAIRY & CATTLE | Visalia, CA | Mechanics Bank |
| $350,000–1 million | MENDOZA BERRY FARMS | Salinas, CA | Mechanics Bank |
| $150,000–350,000 | MENDOZA'S AUTO SALES | Modesto, CA | Mechanics Bank |
| $350,000–1 million | MENTIS | NAPA, CA | Mechanics Bank |
| $350,000–1 million | MENTIS | Napa, CA | Mechanics Bank |
| $1–2 million | MERCED COUNTY COMMUNITY ACTION BOARD | Merced, CA | Mechanics Bank |
| $1–2 million | MERCHANTS FORCE INC. | COSTA MESA, CA | Mechanics Bank |
| $1–2 million | MESA HARVESTING COMPANY | SANTA MARIA, CA | Mechanics Bank |
| $350,000–1 million | MESA VIEW PRODUCE, INC. | SANTA MARIA, CA | Mechanics Bank |
| $350,000–1 million | MESQUITE CATTLE FEEDERS, INC. | BRAWLEY, CA | Mechanics Bank |
| $150,000–350,000 | METRO READY MIX LP | BAKERSFIELD, CA | Mechanics Bank |
| $350,000–1 million | MG CONSTRUCTORS AND ENGINEERS INC. | MORGAN HILL, CA | Mechanics Bank |
| $350,000–1 million | MG PARTNERS, INC. | CAMARILLO, CA | Mechanics Bank |
| $350,000–1 million | MICHAEL CASTRO CONSTRUCTION, INC. | Freedom, CA | Mechanics Bank |
| $350,000–1 million | MICHAEL CASTRO CONSTRUCTION, INC. | FREEDOM, CA | Mechanics Bank |
| $150,000–350,000 | MICHAEL J GUNSON, DDS, MD, PMC | SANTA BARBARA, CA | Mechanics Bank |
| $150,000–350,000 | MIDGIE'S GOOD CREAM LP DBA RE:THINK ICE CREAM | Napa, CA | Mechanics Bank |
| $150,000–350,000 | MIGUEL A RAMOS DBA RAMOS FARMS | WATSONVILLE, CA | Mechanics Bank |
| $150,000–350,000 | MIKE COLE FARMS | SANTA MARGARITA, CA | Mechanics Bank |
| $2–5 million | MIKE'S FARM LABOR, INC. | SOMIS, CA | Mechanics Bank |
| $150,000–350,000 | MIKE'S FENCING INC. | Bakersfield, CA | Mechanics Bank |
| $150,000–350,000 | MIKE'S GRANDE BURGER | Oroville, CA | Mechanics Bank |
| $150,000–350,000 | MIKES FENCING, INC. | Bakersfield, CA | Mechanics Bank |
| $150,000–350,000 | MILK MAID DAIRY | VISALIA, CA | Mechanics Bank |
| $150,000–350,000 | MILK TIME DAIRY | MADERA, CA | Mechanics Bank |
| $150,000–350,000 | MILKY WAY DAIRY, LLC | MARICOPA, AZ | Mechanics Bank |
| $350,000–1 million | MILKY WAY FARMS, LLC | Brawley, CA | Mechanics Bank |
| $350,000–1 million | MILKY WAY TRUCKING LLC | SAN JACINTO, CA | Mechanics Bank |
| $350,000–1 million | MILL CONSTRUCTION COMPANY | SALINAS, CA | Mechanics Bank |
| $150,000–350,000 | MILLENNIUM DESIGN & CONSULTINGINC. | Danville, CA | Mechanics Bank |
| $150,000–350,000 | MILPAS RENTAL INC | SANTA BARBARA, CA | Mechanics Bank |
| $150,000–350,000 | MILPAS RENTAL INC | Santa Barbara, CA | Mechanics Bank |
| $1–2 million | MINTURN NUT CO INC | LE GRAND, CA | Mechanics Bank |