| MAR-ED ENTERPRISES | — | FM0092572 | 1988-11-28 | Active | |
| MAR-EL HOLDINGS LTD. | — | BC0125264 | 1974-02-15 | Inactive | |
| MAR-EL PROJECTS LTD. | — | BC0418808 | 1992-01-21 | Inactive | |
| MAR-ELE BOUTIQUE LTD. | — | BC0097389 | 1970-12-18 | Inactive | |
| MAR-EX EQUIPMENT | — | FM0323635 | 2002-05-23 | Active | |
| MAR-FERNE HOLDINGS LTD. | — | BC0073903 | 1967-04-20 | Inactive | |
| MAR-FLEK HOLDINGS LTD. | — | BC0229873 | 1981-03-19 | Inactive | |
| MAR-FRAN HOLDINGS LTD. | — | BC0241428 | 1981-08-26 | Inactive | |
| MAR-FRED CONTRACTING LTD. | — | BC1224273 | 2019-09-23 | Active | |
| MAR-FRED HOLDINGS | — | FM0010782 | 1972-10-06 | Active | |
| MAR-GAIL CERAMICS | — | FM0024011 | 1976-09-23 | Inactive | |
| MAR-GAL ENTERPRISES LTD. | — | BC0190072 | 1979-04-27 | Inactive | |
| MAR-GAS SALES & SERVICE | — | FM0072479 | 1986-09-24 | Active | |
| MAR-GEN SERVICES LTD. | — | BC0248013 | 1982-01-22 | Inactive | |
| MAR-GLEN VENTURES LTD. | — | A0050456 | 1999-10-14 | Inactive | |
| MAR-IND MARINE-INDUSTRIAL SURVEY-DESIGN-DRAFTING CONTROLS | — | FM0046983 | 1983-04-14 | Inactive | |
| MAR-J MANAGEMENT LTD. | — | BC0165530 | 1977-09-07 | Inactive | |
| MAR-JAC ENTERPRISES LTD. | — | BC0351319 | 1988-09-12 | Inactive | |
| MAR-JAC HOLDINGS LTD. | — | BC0136502 | — | Inactive | |
| MAR-JAL INDUSTRIES LTD. | — | BC0184326 | 1978-12-20 | Inactive | |
| MAR-JAN HOLDINGS LTD. | — | BC0124314 | 1974-01-15 | Inactive | |
| MAR-JO ENTERPRISES | — | FM0153000 | 1993-11-30 | Active | |
| MAR-JO HOLDINGS | — | FM0296000 | 2001-02-21 | Active | |
| MAR-JO WELDING & MECHANICAL SERVICES LTD. | — | BC0453194 | 1993-08-19 | Inactive | |
| MAR-JON BRIDGE RIVER GOLD MINES LIMITED (NON-PERSONAL LIABILITY) | — | BC0013979 | — | Inactive | |
| MAR-KAM INTERNATIONAL INC. | — | BC0145914 | 1976-02-26 | Inactive | |
| MAR-KAR INVESTMENTS LTD. | — | BC0223282 | 1980-12-29 | Inactive | |
| MAR-KATH ENTERPRISES LIMITED | — | BC0196901 | 1979-09-13 | Inactive | |
| MAR-KAY HOLDINGS LTD. | — | BC0067579 | 1965-12-30 | Inactive | |
| MAR-KEE DEVELOPMENTS LIMITED | — | BC0410752 | 1991-08-14 | Inactive | |
| MAR-KEI ENTERPRISES LTD. | — | BC0234990 | 1981-05-20 | Inactive | |
| MAR-KEL PAINTING & PAPER | — | FM0180377 | 1995-06-01 | Active | |
| MAR-KEN OPTICS LTD. | — | BC0211048 | 1980-06-06 | Inactive | |
| MAR-KERR ENTERPRISES LTD. | — | BC0205605 | 1980-02-29 | Inactive | |
| MAR-KEY MORTGAGE FINANCIAL CORP. | — | BC0261278 | 1983-03-11 | Inactive | |
| MAR-KING HOLDINGS LTD. | — | BC0208815 | 1980-04-25 | Inactive | |
| MAR-KUT TECHNICAL SERVICES | — | FM0119991 | 1991-06-12 | Active | |
| MAR-KWEST CONSULTANTS LTD. | — | BC0120743 | 1973-08-06 | Inactive | |
| MAR-LA DESIGN | — | FM0109700 | 1990-07-16 | Active | |
| MAR-LA-PAK FOREST GREENS LTD. | — | BC0169088 | 1977-12-15 | Inactive | |
| MAR-LAMB ENTERPRISES LTD. | — | BC0423871 | 1992-04-09 | Inactive | |
| MAR-LAND DESIGN LTD. | — | BC0206610 | 1980-03-18 | Inactive | |
| MAR-LAND PROPERTIES LTD. | — | BC0229493 | 1981-03-16 | Inactive | |
| MAR-LEE CHINA & GIFT SHOP LTD. | — | BC0096590 | — | Inactive | |
| MAR-LEE CONSTRUCTION LTD. | — | BC0097227 | — | Inactive | |
| MAR-LEE ENTERPRISES LTD. | — | BC0091157 | — | Inactive | |
| MAR-LEE INVESTMENTS LTD. | — | BC0186558 | 1979-02-13 | Inactive | |
| MAR-LEEN FASHIONS | — | FM0044112 | 1982-09-28 | Active | |
| MAR-LEN BOOKKEEPING | — | FM0222605 | 1997-06-25 | Active | |
| MAR-LEN ENTERPRISES | — | FM0166257 | 1994-08-30 | Active | |
| MAR-LEN MANAGEMENT | — | FM0323163 | 2002-05-15 | Active | |
| MAR-LIL ESTATES LTD. | — | BC0080241 | — | Inactive | |
| MAR-LIN HOLDINGS INC. | — | BC0123798 | 1973-12-19 | Inactive | |
| MAR-LINA HOLDINGS COMPANY LTD. | — | BC1245783 | 2020-03-30 | Active | |
| MAR-LO ENTERPRISES LTD. | — | BC0058017 | — | Inactive | |
| MAR-LOG ENTERPRISES LTD. | — | BC0184252 | 1978-12-19 | Inactive | |
| MAR-LOU ENTERPRISES LTD. | — | BC0220586 | 1980-11-19 | Inactive | |
| MAR-LYN BEVERAGES | — | FM0078615 | 1987-05-26 | Active | |
| MAR-LYN INVESTMENTS INC. | — | BC0167445 | 1977-10-28 | Inactive | |
| MAR-LYN LANDS CORP. | — | BC0171488 | 1978-02-21 | Inactive | |
| MAR-LYN SALES & SERVICES LTD. | — | BC0345223 | 1988-05-11 | Inactive | |
| MAR-LYN'S DREAM | — | FM0379509 | 2004-08-31 | Active | |
| MAR-LYNN HANDYMAN SERVICES | — | FM0386646 | 2004-12-17 | Active | |
| MAR-LYNN VENTURES INC. | — | A0044576 | 1997-02-27 | Inactive | |
| MAR-LYNNE ENTERPRISES LTD. | — | BC0073020 | 1967-02-21 | Inactive | |
| MAR-MAC FOREST PRODUCTS LTD. | — | BC0203911 | 1980-01-31 | Inactive | |
| MAR-MAY HOLDINGS LTD. | — | A0032893 | 1991-02-14 | Inactive | |
| MAR-MIC CONTRACTING LTD. | — | BC0088011 | 1969-07-10 | Inactive | |
| MAR-MIN HOLDINGS LTD. | — | BC0357244 | 1988-12-30 | Inactive | |
| MAR-MOUNT DEVELOPMENTS LIMITED | — | BC0217213 | 1980-09-30 | Inactive | |
| MAR-NAD ENTERPRISES LTD. | — | BC0305590 | 1986-03-05 | Inactive | |
| MAR-NET CARRIERS LTD. | — | BC0301747 | 1985-12-13 | Inactive | |
| MAR-NIK ELECTRONICS | — | FM0036901 | 1981-03-10 | Active | |
| MAR-OAK INDUSTRIES LTD. | — | BC0299078 | 1985-10-15 | Inactive | |
| MAR-PAC MARKETING CORPORATION | — | BC0287612 | 1985-01-24 | Inactive | |
| MAR-PAT FISHING LTD. | — | BC0118481 | 1973-05-15 | Inactive | |
| MAR-PAT INVESTMENTS LTD. | — | BC0201360 | 1979-12-11 | Inactive | |
| MAR-PEN CONSTRUCTION AND MANAGEMENT LTD. | — | BC0345187 | 1988-05-11 | Inactive | |
| MAR-POL FASHIONS LTD. | — | BC0075370 | 1967-07-31 | Inactive | |
| MAR-PRO ENTERPRISES | — | FM0063563 | 1985-09-05 | Active | |
| MAR-RAY HOLDINGS LTD. | — | BC0149323 | 1976-06-01 | Inactive | |
| MAR-REN INVESTMENTS LTD. | — | BC0217200 | 1980-09-30 | Inactive | |
| MAR-RIK HOLDINGS | — | FM0288858 | 2000-10-04 | Active | |
| MAR-RISA HOLDINGS INC. | — | A0125147 | 2022-11-01 | Inactive | |
| MAR-RISA HOLDINGS INC. | — | A0109100 | 2019-03-17 | Inactive | |
| MAR-RITE INDUSTRIES LTD. | — | BC0056124 | — | Inactive | |
| MAR-RO INDUSTRIES LTD. | — | BC0200985 | 1979-12-04 | Inactive | |
| MAR-ROB HOLDINGS | — | FM0025857 | 1978-02-08 | Active | |
| MAR-ROB HOLDINGS LTD. | — | BC0214349 | 1980-08-11 | Inactive | |
| MAR-ROY INVESTMENTS LTD. | — | BC0049046 | 1960-11-10 | Inactive | |
| MAR-S CONSULTING INC. | — | BC0672740 | 2003-07-03 | Inactive | |
| MAR-S ONLINE ENTERPRISES | — | FM0475170 | 2008-04-12 | Active | |
| MAR-S PRODUCTS | — | FM0255425 | 1999-03-11 | Active | |
| MAR-SHAWN ENTERPRISES LTD. | — | BC0243346 | 1981-10-02 | Inactive | |
| MAR-SHEL AGENCIES LTD. | — | BC0045654 | — | Inactive | |
| MAR-SHEL HOLDINGS LTD. | — | BC0048023 | — | Inactive | |
| MAR-SON FISHING LTD. | — | BC0247424 | 1982-01-06 | Inactive | |
| MAR-SPEN INVESTMENTS LTD. | — | BC0485188 | 1994-11-30 | Inactive | |
| MAR-STAT COMPUTER SOLUTIONS | — | FM0067224 | 1986-02-21 | Active | |
| MAR-TECH HOLDINGS LIMITED | — | BC0572284 | 1998-09-24 | Inactive | |
| MAR-TECH INSPECTIONS LTD. | — | BC0361287 | 1989-03-08 | Inactive | |
| MAR-TECH MUNICIPAL PIPE SERVICES LTD. | — | A0015262 | 1979-05-16 | Inactive | |
| MAR-TECH MUNICIPAL PIPE SERVICES LTD. | — | BC0185445 | — | Inactive | |
| MAR-TECH TRAFFIC CONTROL LTD. | — | BC0835683 | 2008-09-24 | Inactive | |
| MAR-TECH UNDERGROUND SERVICES | — | FM0239009 | 1998-05-04 | Active | |
| MAR-TECH UNDERGROUND SERVICES LTD. | — | BC0565940 | 1998-06-04 | Active | |
| MAR-TECH WATER SYSTEMS (2000) LTD. | — | BC0599901 | 2000-01-21 | Inactive | |
| MAR-TEN BUILDING LTD. | — | BC0086967 | 1969-05-28 | Inactive | |
| MAR-TER HOLDINGS LTD. | — | BC0061562 | — | Inactive | |
| MAR-TERR ENVIRO RESEARCH LTD. | — | BC0185807 | 1979-01-30 | Inactive | |
| MAR-TINA HOLDINGS INC. | — | BC0144659 | 1976-01-22 | Inactive | |
| MAR-TING ENTERPRISES LTD. | — | BC0287025 | 1985-01-08 | Inactive | |
| MAR-TINI DESIGN COMPANY | — | FM0787185 | 2019-09-11 | Active | |
| MAR-VAL-LEEN-LOG HOMES LTD. | — | BC0153924 | 1976-10-20 | Inactive | |
| MAR-VALLAS WARES LIMITED | — | BC0034774 | — | Inactive | |
| MAR-VAN HOLDINGS INC. | — | BC0201695 | 1979-12-18 | Inactive | |
| MAR-VAN HOLDINGS LTD. | — | BC0081959 | — | Inactive | |
| MAR-VEL INVESTMENTS LTD. | — | BC0270854 | 1983-11-16 | Inactive | |
| MAR-VIC HOLDINGS LTD. | — | BC0218700 | 1980-10-22 | Inactive | |
| MAR-VIC HOLDINGS LTD. | — | BC0444213 | 1993-04-05 | Active | |
| MAR-VILLE SERVICE LTD. | — | BC0080871 | 1968-07-23 | Inactive | |
| MAR-VINE TRUCKING LTD. | — | BC0085481 | 1969-03-26 | Inactive | |
| MAR-VO ENTERPRISES LTD. | — | BC0153903 | 1976-10-20 | Inactive | |
| MAR-WAY ENTERPRISES LTD. | — | BC0154562 | 1976-11-08 | Inactive | |
| MAR-WAYNE ENTERPRISES | — | FM0427234 | 2006-06-19 | Active | |
| MAR-WELL SERVICES LTD. | — | BC0185778 | 1979-01-29 | Inactive | |
| MAR-WEN HOLDINGS LTD. | — | BC1178535 | 2018-09-06 | Active | |
| MAR-WES HOLDINGS LTD. | — | BC0130696 | 1974-08-15 | Inactive | |
| MAR-WEST CONTRACT SERVICES LTD. | — | BC0078353 | 1968-02-29 | Inactive | |
| MAR-WEST RESOURCES LTD. | — | BC0194487 | 1979-07-26 | Inactive | |
| MAR-WIL INVESTMENTS LTD. | — | BC0046884 | 1960-01-26 | Inactive | |
| MAR-WILL CONSTRUCTION 2007 LTD. | — | BC0794862 | 2007-06-20 | Inactive | |
| MAR-WILL CONSTRUCTION LTD. | — | A0034040 | 1991-07-30 | Inactive | |
| MAR-WILL SUPPLIES | — | FM0027828 | 1978-09-11 | Active | |
| MAR-ZAN CONCRETE LTD. | — | BC0377252 | 1989-11-29 | Inactive | |
| MAR/10 BREWS LTD. | — | BC0509976 | 1995-12-13 | Inactive | |
| MARA + NATHA ARCHITECTURE | — | FM0434347 | 2006-09-27 | Active | |
| MARA + NATHA ARCHITECTURE LTD. | — | BC1008148 | 2014-07-15 | Active | |
| MARA - RIANDA SCHOOL | — | FM0336539 | 2002-12-11 | Active | |
| MARA ACCESSORIES | — | FM0244229 | 1998-07-30 | Active | |
| MARA ADVISORY CORP. | — | BC1311514 | 2021-06-21 | Active | |
| MARA APARTMENTS LTD. | — | BC0042788 | — | Inactive | |
| MARA APPLIANCES LTD. | — | BC1014434 | 2014-09-24 | Active | |
| MARA BAUM CONSULTING ULC | — | BC1310609 | 2021-06-16 | Active | |
| MARA BROS. HOMES INC. | — | BC0582619 | 1999-03-31 | Inactive | |
| MARA BUSINESS GROUP | — | FM0368909 | 2004-03-30 | Active | |
| MARA CAMPING & RV | — | FM0378860 | 2004-08-20 | Active | |
| MARA CAPITAL LTD. | — | BC1036165 | 2015-05-11 | Active | |
| MARA CENTRE OF HOMEOPATHY LTD. | — | BC0593112 | 1999-09-27 | Inactive | |
| MARA CLOTHING CO. | — | FM0764975 | 2019-01-08 | Active | |
| MARA COMMUNITY CHURCH (INTER-DENOMINATIONAL) | — | S0021475 | 1986-06-27 | Active | |
| MARA CONSTRUCTION CO. LTD. | — | BC0167015 | 1977-10-18 | Inactive | |
| MARA CONSTRUCTION LTD. | — | BC0052172 | — | Inactive | |
| MARA CONSULTANTS LTD. | — | BC0385604 | 1990-04-12 | Inactive | |
| MARA CONSULTING INC. | — | BC1056222 | 2015-11-23 | Inactive | |
| MARA CONSULTING SERVICES LTD. | — | BC0529920 | 1996-10-28 | Inactive | |
| MARA CREEK GIFTS | — | FM0209189 | 1996-11-01 | Active | |
| MARA CULINARY DELIGHTS | — | FM0519766 | 2010-01-18 | Active | |
| MARA DEVELOPMENTS LTD. | — | C0290098 | 1985-03-22 | Inactive | |
| MARA ELECTRIC | — | FM0130303 | 1992-05-25 | Active | |
| MARA ENTERPRISES | — | FM0128521 | 1992-03-26 | Active | |
| MARA ENTERPRISES CORPORATION | — | BC0432514 | 1992-09-18 | Inactive | |
| MARA ENTERPRISES LTD. | — | BC0077602 | — | Inactive | |
| MARA ENTERPRISES LTD. | — | BC0757565 | 2006-05-12 | Inactive | |
| MARA ESTATE LIMITED | — | BC0005282 | — | Inactive | |
| MARA EVE & COMPANY | — | FM0490085 | 2008-11-13 | Active | |
| MARA FINANCIAL COMMUNICATIONS CORP. | — | A0067587 | 2006-04-03 | Inactive | |
| MARA FOODLINER | — | FM0609102 | 2013-06-07 | Active | |
| MARA FOOT NURSE | — | FM0792552 | 2019-11-20 | Active | |
| MARA FORMING | — | FM0678149 | 2016-01-09 | Active | |
| MARA GARDEN DESIGN | — | FM0500127 | 2009-04-15 | Active | |
| MARA GLOUBERMAN COACHING | — | FM1019034 | 2023-06-14 | Active | |
| MARA HEIGHTS ESTATES LTD. | — | BC0105259 | — | Inactive | |
| MARA HEIGHTS ROAD SOCIETY | — | S0064589 | 2015-09-04 | Active | |
| MARA HERON HOLDINGS LTD. | — | BC1298857 | 2021-04-08 | Active | |
| MARA HI LINE CONTRACTORS LTD. | — | BC0057050 | 1963-06-18 | Inactive | |
| MARA HILLS GOLF RESORT | — | FM0882763 | 2022-06-07 | Active | |
| MARA HOLDINGS LTD. | — | BC0852040 | 2009-05-15 | Inactive | |
| MARA HOLDINGS LTD. | — | BC1348261 | 2022-02-15 | Active | |
| MARA HOME AND HEALTH SERVICES INC. | — | A0143476 | 2026-08-28 | Active | |
| MARA INDUSTRIES (2013) INC. | — | BC0968614 | 2013-04-26 | Inactive | |
| MARA INDUSTRIES (2015) INC. | — | BC1035052 | 2015-04-29 | Active | |
| MARA INDUSTRIES INCORPORATED | — | BC0909997 | 2011-05-09 | Inactive | |
| MARA INDUSTRIES LTD. | — | BC0055006 | 1962-11-19 | Inactive | |
| MARA INDUSTRIES LTD. | — | A0011830 | — | Inactive | |
| MARA INVESTMENTS INC. | — | BC0125986 | 1974-03-12 | Inactive | |
| MARA JADE INC. | — | BC1123330 | 2017-06-16 | Active | |
| MARA JEMS | — | FM0046829 | 1983-04-06 | Active | |
| MARA JEWELLERS INC. | — | BC1598315 | 2026-07-04 | Active | |
| MARA JONES & CO. LIMITED | — | QE0001404 | — | Inactive | |
| MARA LAKE ELECTRIC | — | FM0445321 | 2007-03-05 | Active | |
| MARA LAKE ELECTRIC LTD. | — | BC0261429 | 1983-03-15 | Inactive | |
| MARA LAKE ESTATES LTD. | — | BC0753966 | 2006-04-05 | Active | |
| MARA LAKE ESTATES LTD. | — | BC0102652 | 1971-09-03 | Inactive | |
| MARA LAKE HOLDINGS LTD. | — | BC0090319 | 1969-11-12 | Inactive | |
| MARA LAKE INVESTMENTS LTD. | — | BC1096463 | 2016-11-14 | Active | |
| MARA LAKE LOGGING CO. LTD. | — | BC0028562 | — | Inactive | |
| MARA LAKE MARINE | — | FM1042085 | 2024-03-26 | Active | |
| MARA LAKE MINES LTD. (N.P.L.) | — | BC0087774 | — | Inactive | |
| MARA LAKE MINING COMPANY LIMITED (NON-PERSONAL LIABILITY) | — | A0000876 | — | Inactive | |