| KEYSTONE CREATIVE STUDIOS | — | FM0652638 | 2015-02-10 | Active | |
| KEYSTONE CREEK PROPERTIES LTD. | — | BC0894353 | 2010-11-02 | Inactive | |
| KEYSTONE CUSTOM BUILD LTD. | — | BC1279780 | 2020-12-16 | Active | |
| KEYSTONE CUSTOMS BROKERAGE LTD. | — | BC1590153 | 2026-05-11 | Active | |
| KEYSTONE DATA ALLIANCE LTD. | — | BC0742868 | 2005-12-12 | Inactive | |
| KEYSTONE DENTAL CENTRE | — | FM0228840 | 1997-10-23 | Inactive | |
| KEYSTONE DESIGN | — | FM0179067 | 1995-05-09 | Active | |
| KEYSTONE DESIGNS | — | FM0083586 | 1987-12-18 | Active | |
| KEYSTONE DESIGNS | — | FM0142989 | 1993-04-29 | Active | |
| KEYSTONE DEVELOPMENT (BLACK FOREST) LTD. | — | BC0855942 | 2009-07-02 | Inactive | |
| KEYSTONE DEVELOPMENT COMPANY LIMITED | — | BC0004495 | — | Inactive | |
| KEYSTONE DEVELOPMENT SERVICES INC. | — | BC0650905 | 2002-07-11 | Inactive | |
| KEYSTONE DEVELOPMENTS LIMITED | — | BC0223559 | 1980-12-31 | Inactive | |
| KEYSTONE DEVELOPMENTS LTD. | — | BC0232359 | 1981-04-15 | Inactive | |
| KEYSTONE DEVELOPMENTS LTD. | — | BC0079040 | — | Inactive | |
| KEYSTONE DISTRIBUTION GROUP INC. | — | BC1281726 | 2020-12-30 | Inactive | |
| KEYSTONE DISTRIBUTION INC. | — | BC1060554 | 2016-01-05 | Inactive | |
| KEYSTONE DISTRIBUTION MANAGEMENT LTD. | — | BC0415386 | 1991-11-15 | Inactive | |
| KEYSTONE DISTRIBUTORS LTD. | — | BC0164463 | 1977-08-05 | Inactive | |
| KEYSTONE DRYWALL LTD. | — | BC1474653 | 2024-04-07 | Active | |
| KEYSTONE DRYWALL SYSTEMS LTD. | — | A0021466 | 1983-12-15 | Inactive | |
| KEYSTONE EDUCATION | — | FM0635835 | 2014-06-05 | Active | |
| KEYSTONE EDUCATION CENTER | — | FM0507055 | 2009-07-14 | Active | |
| KEYSTONE EDUCATION CENTER | — | FM0502299 | 2009-05-12 | Inactive | |
| KEYSTONE EDUCATION INC. | — | BC1006030 | 2014-06-22 | Active | |
| KEYSTONE ELDERCARE SOLUTIONS | — | FM0598023 | 2013-01-01 | Inactive | |
| KEYSTONE ELDERCARE SOLUTIONS | — | FM0542947 | 2010-11-15 | Inactive | |
| KEYSTONE ELDERCARE SOLUTIONS | — | FM1013778 | 2023-04-13 | Active | |
| KEYSTONE ELDERCARE SOLUTIONS LTD. | — | BC1200834 | 2019-03-12 | Active | |
| KEYSTONE ELECTRIC LTD. | — | BC0655698 | 2002-10-02 | Active | |
| KEYSTONE ENGINEERING & PRODUCTS CO. LTD. | — | BC0051064 | 1961-07-24 | Inactive | |
| KEYSTONE ENGINEERING INC. | — | A0137384 | 2025-06-12 | Active | |
| KEYSTONE ENGINEERING INC. | — | BC0431720 | 1992-09-02 | Inactive | |
| KEYSTONE ENTERPRISES INC. | — | BC0485464 | 1994-12-05 | Active | |
| KEYSTONE ENTERPRISES LIMITED | — | BC0081089 | 1968-08-06 | Inactive | |
| KEYSTONE ENTERPRISES LTD. | — | BC0334618 | 1987-10-09 | Inactive | |
| KEYSTONE ENTERTAINMENT INC. | — | BC0870101 | 2010-01-01 | Inactive | |
| KEYSTONE ENTERTAINMENT INC. | — | BC1235813 | 2020-01-01 | Inactive | |
| KEYSTONE ENTREPRENEURIAL SERVICES LTD. | — | BC0262636 | 1983-04-13 | Inactive | |
| KEYSTONE ENVIRONMENTAL CONSULTANTS INC. | — | BC0521212 | 1996-06-04 | Inactive | |
| KEYSTONE ENVIRONMENTAL GROUP LTD. | — | BC0521215 | 1996-06-04 | Inactive | |
| KEYSTONE ENVIRONMENTAL LTD. | — | BC0446192 | 1993-04-30 | Inactive | |
| KEYSTONE ENVIRONMENTAL LTD. | — | A0057286 | 2002-07-12 | Active | |
| KEYSTONE ENVIRONMENTAL PRAIRIE DIVISION LTD. | — | A0139697 | 2025-12-09 | Active | |
| KEYSTONE EQUINE TRADING | — | FM0251125 | 1998-12-15 | Active | |
| KEYSTONE EQUIPMENT CO. LTD. | — | BC0197635 | 1979-09-27 | Inactive | |
| KEYSTONE EXCAVATING LTD. | — | BC1136903 | 2017-10-08 | Inactive | |
| KEYSTONE EXERCISE INC. | — | A0112246 | 2020-01-17 | Active | |
| KEYSTONE EXPERIENCES LTD. | — | BC1235133 | 2020-01-01 | Active | |
| KEYSTONE EXPERIENCES LTD. | — | BC0385462 | 1990-04-10 | Inactive | |
| KEYSTONE EXPRESS MARKET | — | FM0564555 | 2011-08-28 | Active | |
| KEYSTONE EXTRAS | — | FM0212799 | 1997-01-16 | Active | |
| KEYSTONE FARM | — | FM0473571 | 2008-03-25 | Active | |
| KEYSTONE FARM LTD. | — | BC1320586 | 2021-08-19 | Active | |
| KEYSTONE FENCING & GATE LTD. | — | BC1340098 | 2021-12-28 | Active | |
| KEYSTONE FILM PRODUCTIONS (WEST) INC./PRODUCTIONS DE FILMS KEYSTONE (OUEST) INC. | — | A0039969 | 1994-11-22 | Inactive | |
| KEYSTONE FINANCE INC. | — | A0098891 | 2016-05-12 | Inactive | |
| KEYSTONE FINANCE LTD. | — | BC0237336 | 1981-06-17 | Inactive | |
| KEYSTONE FINANCE LTD. | — | BC0055501 | 1963-01-14 | Inactive | |
| KEYSTONE FINANCIAL PUBLISHING CORP. | — | BC0566272 | 1998-06-10 | Active | |
| KEYSTONE FINE CABINETRY LTD. | — | BC0925719 | 2011-11-22 | Inactive | |
| KEYSTONE FINE WINES | — | FM0487508 | 2008-10-03 | Active | |
| KEYSTONE FISHERY LTD. | — | BC1066244 | 2016-02-26 | Active | |
| KEYSTONE FORD SALES LTD. | — | A0082535 | 2011-02-11 | Inactive | |
| KEYSTONE FOREST PRODUCTS LTD. | — | BC0109222 | 1972-05-24 | Active | |
| KEYSTONE FORESTRY SERVICES LTD. | — | BC0517741 | 1996-04-19 | Inactive | |
| KEYSTONE FOTO LIMITED | — | BC0977277 | 2013-08-07 | Active | |
| KEYSTONE GATE ADVISORY CORPORATION | — | BC1129062 | 2017-08-02 | Inactive | |
| KEYSTONE GATE MANAGEMENT (CANADA) INC. | — | BC0827598 | 2008-06-12 | Inactive | |
| KEYSTONE GENERAL CONTRACTORS | — | FM0792874 | 2019-11-25 | Active | |
| KEYSTONE GENERAL CONTRACTORS | — | FM0791349 | 2019-11-02 | Inactive | |
| KEYSTONE GENERAL PARTNER INC. | — | BC1454492 | 2023-12-12 | Active | |
| KEYSTONE GLOBAL SERVICES INC. | — | BC0964742 | 2013-03-12 | Active | |
| KEYSTONE GOLD MINING COMPANY LIMITED LIABILITY | — | QD0000815 | — | Inactive | |
| KEYSTONE GOLD, INC. | — | A0045749 | 1997-09-10 | Inactive | |
| KEYSTONE GRAVEL SALES LTD. | — | BC1199924 | 2019-03-05 | Active | |
| KEYSTONE GROUP - ABBOTT REALTY LTD. | — | BC0374762 | 1989-10-23 | Inactive | |
| KEYSTONE HARDSCAPE AND EXCAVATION LTD. | — | BC1361582 | 2022-05-06 | Inactive | |
| KEYSTONE HARDSCAPING | — | FM0839425 | 2021-03-30 | Active | |
| KEYSTONE HEALTH | — | FM0810899 | 2020-07-14 | Active | |
| KEYSTONE HEALTH SOLUTIONS | — | FM0477849 | 2008-05-14 | Active | |
| KEYSTONE HEAVY LIFT CORPORATION | — | BC0229703 | 1981-03-18 | Inactive | |
| KEYSTONE HELICOPTERS LTD. | — | BC0174892 | 1978-05-08 | Inactive | |
| KEYSTONE HOLDING CORP. | — | BC0692155 | 2004-04-06 | Active | |
| KEYSTONE HOLDINGS LIMITED | — | BC0010199 | — | Inactive | |
| KEYSTONE HOLDINGS LTD. | — | BC0383198 | 1990-03-02 | Inactive | |
| KEYSTONE HOLDINGS LTD. | — | BC0069240 | — | Inactive | |
| KEYSTONE HOLDINGS LTD. | — | BC0191365 | 1979-05-23 | Inactive | |
| KEYSTONE HOME INSPECTIONS | — | FM0724312 | 2017-07-21 | Active | |
| KEYSTONE HOUSE INSPECTIONS INC. | — | BC0784622 | 2007-03-06 | Inactive | |
| KEYSTONE HVAC LTD. | — | BC1086142 | 2016-08-16 | Active | |
| KEYSTONE I DISTRIBUTION AND COMPANY, LIMITED PARTNERSHIP | — | XP0136737 | 1992-11-13 | Active | |
| KEYSTONE I PRODUCTION MANAGEMENT AND COMPANY, LIMITED PARTNERSHIP | — | XP0137579 | 1992-12-04 | Active | |
| KEYSTONE II DISTRIBUTION AND COMPANY, LIMITED PARTNERSHIP | — | XP0136738 | 1992-11-13 | Active | |
| KEYSTONE II PRODUCTION MANAGEMENT & COMPANY, LIMITED PARTNERSHIP | — | XP0137731 | 1992-12-08 | Active | |
| KEYSTONE IMAGE | — | FM0388480 | 2005-01-20 | Active | |
| KEYSTONE IMMIGRATION CONSULTANCY LTD. | — | A0137662 | 2025-07-02 | Active | |
| KEYSTONE IMPORTS LTD. | — | BC0784288 | 2007-03-01 | Inactive | |
| KEYSTONE INDUSTRIES LIMITED | — | BC0026550 | — | Inactive | |
| KEYSTONE INDUSTRIES, INC. | — | BC0578370 | 1999-01-15 | Inactive | |
| KEYSTONE INFORMATION TECHNOLOGY | — | FM1070585 | 2025-03-13 | Active | |
| KEYSTONE INFRASTRUCTURE CONSULTING LTD. | — | BC1598527 | 2026-07-07 | Active | |
| KEYSTONE INITIATIVES | — | FM0436645 | 2006-10-30 | Active | |
| KEYSTONE INNOVATIONS LTD. | — | BC1244409 | 2020-03-13 | Inactive | |
| KEYSTONE INSPECTION & ENGINEERING INC. | — | BC0586469 | 1999-06-02 | Inactive | |
| KEYSTONE INSPECTION AND ENGINEERING SERVICES | — | FM0189621 | 1995-11-15 | Active | |
| KEYSTONE INSPECTIONS | — | FM0710890 | 2017-02-22 | Active | |
| KEYSTONE INSURANCE BROKERS LTD. | — | BC0385090 | 1990-04-04 | Active | |
| KEYSTONE INTERIORS INC. | — | BC1326488 | 2021-09-29 | Active | |
| KEYSTONE INTERNET SERVICES LTD. | — | BC0363083 | 1989-04-06 | Active | |
| KEYSTONE INVESTMENTS INC. | — | BC1070531 | 2016-04-01 | Active | |
| KEYSTONE INVESTMENTS INC. | — | BC0330932 | 1987-07-27 | Inactive | |
| KEYSTONE INVESTMENTS LIMITED | — | BC0017810 | — | Inactive | |
| KEYSTONE INVESTMENTS LTD. | — | BC0219292 | 1980-10-29 | Inactive | |
| KEYSTONE ISOLATION TECHNOLOGIES LTD. | — | BC1466069 | 2024-02-15 | Active | |
| KEYSTONE J & K SERVICE INCORPORATION | — | BC0495560 | 1995-04-28 | Inactive | |
| KEYSTONE KIDS FOUNDATION | — | S0045815 | 2003-03-12 | Inactive | |
| KEYSTONE LANDSCAPE LTD. | — | BC0769800 | 2006-09-22 | Inactive | |
| KEYSTONE LANDSCAPING | — | FM0249343 | 1998-11-10 | Active | |
| KEYSTONE LAW GROUP | — | FM1016813 | 2023-05-16 | Active | |
| KEYSTONE LAW GROUP LAW CORPORATION | — | BC1005924 | 2014-06-20 | Active | |
| KEYSTONE LEGACY ENDOWMENT FOUNDATION | — | S0084474 | 2026-01-29 | Active | |
| KEYSTONE LEGAL RESEARCH | — | FM0537667 | 2010-09-02 | Active | |
| KEYSTONE LINES | — | FM0108446 | 1990-06-05 | Active | |
| KEYSTONE LIVING | — | FM0635951 | 2014-06-07 | Active | |
| KEYSTONE LOGGING LTD. | — | BC0199782 | 1979-11-08 | Inactive | |
| KEYSTONE LOGGING SUPPLIES LTD. | — | BC1190649 | 2018-12-18 | Active | |
| KEYSTONE LUBRICATING COMPANY | — | A0002650 | — | Inactive | |
| KEYSTONE LUMBER COMPANY LIMITED | — | QE0002329 | — | Inactive | |
| KEYSTONE MACHINE | — | FM0358569 | 2003-10-30 | Active | |
| KEYSTONE MACHINE WORKS LIMITED | — | BC0056473 | — | Inactive | |
| KEYSTONE MANAGEMENT INC. | — | BC0123776 | 1973-12-17 | Inactive | |
| KEYSTONE MANAGEMENT SOLUTIONS | — | FM0499106 | 2009-03-30 | Active | |
| KEYSTONE MANTEL MASTER | — | FM0192621 | 1996-01-19 | Active | |
| KEYSTONE MARK ENTERPRISES INC. | — | BC1603170 | 2026-08-09 | Active | |
| KEYSTONE MARKET | — | FM0580966 | 2012-04-12 | Active | |
| KEYSTONE MARKETING | — | FM0034179 | 1980-06-13 | Active | |
| KEYSTONE MARKETING LTD. | — | BC0219771 | 1980-11-04 | Inactive | |
| KEYSTONE MASONRY | — | FM0885989 | 2022-07-15 | Active | |
| KEYSTONE MASONRY | — | FM0666091 | 2015-07-23 | Active | |
| KEYSTONE MASONRY CONSTRUCTION INC. | — | BC1076388 | 2016-05-19 | Inactive | |
| KEYSTONE MASONRY LTD. | — | BC0216210 | 1980-09-15 | Inactive | |
| KEYSTONE MASONRY LTD. | — | BC1479067 | 2024-05-02 | Active | |
| KEYSTONE MASSAGE & HEALING LTD. | — | BC1503162 | 2024-09-23 | Active | |
| KEYSTONE MASSAGE THERAPY & HEALING CENTER | — | FM0482342 | 2008-07-17 | Active | |
| KEYSTONE MATERIALS LIMITED PARTNERSHIP | — | FM0075158 | 1987-01-28 | Active | |
| KEYSTONE MECHANICAL | — | FM0648111 | 2014-12-03 | Active | |
| KEYSTONE MECHANICAL | — | FM0445877 | 2007-03-12 | Active | |
| KEYSTONE MECHANICAL LTD. | — | BC0138346 | 1975-06-09 | Inactive | |
| KEYSTONE MERCHANDISING | — | FM0428505 | 2006-07-07 | Active | |
| KEYSTONE METALS & MINERALS INC. | — | A0140422 | 2026-01-29 | Active | |
| KEYSTONE MILLWORK LTD. | — | BC0556363 | 1997-12-23 | Inactive | |
| KEYSTONE MINES LIMITED | — | QE0001060 | — | Inactive | |
| KEYSTONE MINING COMPANY LIMITED (NON-PERSONAL LIABILITY) | — | QE0003017 | — | Inactive | |
| KEYSTONE MINING COMPANY LIMITED (NON-PERSONAL LIABILITY) | — | BC0006744 | — | Inactive | |
| KEYSTONE MINISTRIES | — | XS0019401 | 1984-07-30 | Active | |
| KEYSTONE MOBILE RADIO SERVICES LTD. | — | BC0257145 | 1982-11-25 | Inactive | |
| KEYSTONE MOBILE RV SERVICES | — | FM0724311 | 2017-07-21 | Active | |
| KEYSTONE MODULAR SERVICES | — | FM0509030 | 2009-08-14 | Active | |
| KEYSTONE MONTESSORI PRE-SCHOOL LTD. | — | BC0589248 | 1999-07-20 | Inactive | |
| KEYSTONE MOTORS LTD. | — | BC1602049 | 2026-07-30 | Inactive | |
| KEYSTONE MOUNTAIN RESOURCES LTD. | — | BC0480660 | 1994-09-20 | Inactive | |
| KEYSTONE MSB MASONRY | — | FM0553561 | 2011-04-01 | Inactive | |
| KEYSTONE MSB MASONRY | — | FM0576061 | 2012-02-09 | Active | |
| KEYSTONE MUSIC | — | FM0632483 | 2014-04-24 | Active | |
| KEYSTONE MUSIC STUDIO | — | FM0153446 | 1993-12-09 | Active | |
| KEYSTONE NATIONAL SCHOOL | — | FM0619410 | 2013-10-25 | Active | |
| KEYSTONE NUTRITION | — | FM0765916 | 2019-01-17 | Active | |
| KEYSTONE OF LIFE FOUNDATION | — | S0011930 | 1975-10-28 | Active | |
| KEYSTONE OSTEOPATHY INC. | — | BC1475389 | 2024-04-11 | Active | |
| KEYSTONE PACIFIC MANAGEMENT INC. | — | BC0960993 | 2013-01-26 | Active | |
| KEYSTONE PACIFIC TRANSPORT & SUPPLY | — | FM0758527 | 2018-10-09 | Active | |
| KEYSTONE PAINTERS | — | FM0553846 | 2011-04-05 | Active | |
| KEYSTONE PARTNERS CONSULTING | — | FM1048613 | 2024-06-11 | Active | |
| KEYSTONE PARTNERS CONSULTING INC. | — | BC1486402 | 2024-06-13 | Active | |
| KEYSTONE PERFORMANCE WAREHOUSE LTD. | — | BC0338018 | 1987-12-21 | Inactive | |
| KEYSTONE PICTURES INC. | — | BC0714565 | 2005-01-24 | Inactive | |
| KEYSTONE PLACER MINES LTD. (NON-PERSONAL LIABILITY) | — | BC0043164 | — | Inactive | |
| KEYSTONE PLANNING | — | FM0231803 | 1997-12-19 | Active | |
| KEYSTONE PLASTERING | — | FM0468645 | 2008-01-23 | Active | |
| KEYSTONE PLUMBING & MECHANICAL LTD. | — | BC0244548 | 1981-10-27 | Inactive | |
| KEYSTONE PLUMBING AND HEATING LTD. | — | BC1592293 | 2026-05-26 | Active | |
| KEYSTONE PLUMBING INC. | — | BC0839100 | 2008-11-07 | Inactive | |
| KEYSTONE PORTFOLIO MANAGEMENT SERVICES INC. | — | BC1049648 | 2015-09-21 | Active | |
| KEYSTONE POSSIBILITIES LTD. | — | BC1408830 | 2023-04-02 | Active | |
| KEYSTONE POWER SYSTEMS INC. | — | BC1584912 | 2026-04-02 | Active | |
| KEYSTONE POWERLINE SERVICES INC. | — | BC1043526 | 2015-07-22 | Active | |
| KEYSTONE PRECAST LTD. | — | BC0462005 | 1994-01-07 | Active | |
| KEYSTONE PRESS (1949) LTD. | — | BC0024481 | — | Inactive | |
| KEYSTONE PRIVATE WEALTH INC. | — | A0118982 | 2021-07-12 | Active | |
| KEYSTONE PROCESSING | — | FM0541501 | 2010-10-26 | Active | |
| KEYSTONE PRODUCTION MANAGEMENT LTD. | — | BC0432955 | 1992-09-25 | Inactive | |
| KEYSTONE PROFESSIONAL SERVICES GROUP | — | FM0392869 | 2005-03-16 | Active | |
| KEYSTONE PROJECTS LTD. | — | BC0360135 | 1989-02-20 | Active | |
| KEYSTONE PROPERTY INSPECTIONS | — | FM0537538 | 2010-09-01 | Inactive | |
| KEYSTONE PROPERTY INSPECTIONS | — | FM0551818 | 2011-03-12 | Active | |
| KEYSTONE PROPERTY MANAGEMENT | — | FM0560819 | 2011-07-05 | Active | |
| KEYSTONE PROPERTY MANAGEMENT | — | FM0200018 | 1996-05-28 | Active | |
| KEYSTONE PROPERTY MANAGEMENT LTD. | — | BC0916470 | 2011-07-26 | Inactive | |
| KEYSTONE PROPERTY MANAGEMENT LTD. | — | BC1053296 | 2015-10-26 | Active | |