| Ibm Canada Limited CA-E-2N4R-2WND | Federal corporation | Active | Markham | $12.5B |
| Bgis Global Integrated Solutions Canada CA-E-1V9H-76W6 | Licensed business | Cancelled | Toronto | $2.6B |
| Veritaaq Technology House INC. CA-E-442Y-AS2F | Federal corporation | Active | Markham | $1.0B |
| Feast Interactive Inc. CA-E-8CQH-GMDQ | Federal corporation | Active | Markham | $600.7M |
| Lwtab Communications INC. CA-E-7Y8Z-61NG | Federal corporation | Active | Markham | $506.9M |
| Hyundai Auto Canada Corp. CA-E-PFFM-DKRE | Federal corporation | Active | MARKHAM | $326.0M |
| Honda Canada Foundation CA-E-CS3D-1QBD | Registered charity | Active | Markham | $258.8M |
| Xplore Inc. CA-E-41DE-92G4 | Federal corporation | Active | Markham | $120.5M |
| The Cross-cultural Community Services Association CA-E-9TYD-641H | Registered charity | Former | MARKHAM | $98.6M |
| ISM Information Systems Management Corporation CA-E-V8Q6-QH28 | Federal corporation | Inactive | MARKHAM | $75.8M |
| HeartZap Services Inc. CA-E-DGG0-KGTM | Federal corporation | Active | Markham | $67.2M |
| Toshiba Tec Canada Business Solutions INC. CA-E-GT9J-Z117 | Federal corporation | Active | Markham | $48.5M |
| Toshiba Of Canada Limited CA-E-0TFG-1B5X | Federal corporation | Active | MARKHAM | $44.8M |
| LRDG Ltd. CA-E-HGME-0GAM | Federal corporation | Active | Markham | $39.0M |
| Saint Elizabeth Health Care CA-E-RMGV-TM0T | Registered charity | Current | MARKHAM | $36.0M |
| Aligned Vision Group Inc. CA-E-EYZG-M6YG | Federal corporation | Active | Markham | $34.3M |
| Gordon Food Service Canada Ltd. CA-E-X9ZB-TE45 | Federal corporation | Active | Markham | $28.9M |
| Islamic Society Of Markham CA-E-4K6S-SQMJ | Registered charity | Former | MARKHAM | $6.7M |
| York Region Educational Services CA-E-JSTM-JHNY | Registered charity | Active | Markham | $5.1M |
| Project Abraham CA-E-VSQK-QK52 | Registered charity | Active | Markham | $3.0M |
| Canadian Academy Of Geriatric Psychiatry CA-E-KNAP-C1DA | Registered charity | Active | MARKHAM | $2.9M |
| Chapel Place Presbyterian Church CA-E-PAS6-F185 | Registered charity | Current | MARKHAM | $973K |
| Parya Trillium Foundation CA-E-BHGM-ZXE2 | Registered charity | Active | MARKHAM | $867K |
| Islamic Centre of Markham CA-E-MK58-GAE9 | Registered charity | Active | Markham | $606K |
| Toronto Christian Community Church CA-E-Z5C8-JWYZ | Registered charity | Active | MARKHAM | $412K |
| Liberation75 Inc. CA-E-VE7X-HTW0 | Registered charity | Active | Markham | $387K |
| Relieve Humanity International CA-E-6SBE-KM5Q | Registered charity | Active | Markham | $265K |
| Markham Peoples Community Church CA-E-G7FY-MQ4G | Registered charity | Active | Markham | $254K |
| Rhenish Church Of Canada CA-E-8PMS-1YVN | Registered charity | Active | MARKHAM | $227K |
| Markham Christian Community Church CA-E-DKR8-83HM | Registered charity | Active | MARKHAM | $220K |
| Social Services Network For The York Region CA-E-C3G8-PBT1 | Registered charity | Active | Markham | $197K |
| Cornerstone Christian Community Church CA-E-EES2-0EPV | Registered charity | Active | Markham | $159K |
| The Olive Branch Community Church CA-E-5KW8-1V0Y | Registered charity | Active | MARKHAM | $157K |
| CNIW Foundation CA-E-K1SZ-X9N2 | Registered charity | Active | Markham | $149K |
| New Tang Dynasty Charities CA-E-G86R-MD41 | Registered charity | Active | Markham | $114K |
| Across U-hub CA-E-MQCB-ZC89 | Registered charity | Active | Markham | $75K |
| Peel Region Educational Services CA-E-7TAB-KBC7 | Registered charity | Active | Markham | $73K |
| A Rose for Grandma Wellness Hub CA-E-0X2X-9HNB | Registered charity | Active | Markham | $65K |
| Shaolin Luohan Temple CA-E-7T44-7DSM | Registered charity | Active | MARKHAM | $58K |
| Saint Elizabeth Foundation CA-E-YCA4-JP5Q | Registered charity | Active | MARKHAM | $52K |
| Toronto Region Educational Services CA-E-X75J-J94F | Registered charity | Active | Markham | $51K |
| Mahamevna Bhavana Asapuwa Toronto CA-E-AJYW-Y8G5 | Registered charity | Active | MARKHAM | $42K |
| New York Theological Education (canada) Center INC. CA-E-8NHE-THG9 | Registered charity | Active | Markham | $33K |
| Restore Method of Care Canada CA-E-Z4M5-N93F | Registered charity | Active | Markham | $20K |
| Islamic Heritage Of Canada CA-E-PJ5T-FTP7 | Registered charity | Active | MARKHAM | $16K |
| Liver Canada CA-E-SVFX-9NJP | Registered charity | Active | Markham | $15K |
| Hope Bible Church Markham CA-E-KDRD-NPTE | Registered charity | Active | markham | $15K |
| Taskeen Wellness CA-E-RP2B-FTNC | Registered charity | Active | Markham | $11K |
| Cancer Education Research Foundation (CERF) CA-E-2HYK-KYNF | Registered charity | Active | Markham | $9K |
| Rahmah Foundation Canada CA-E-GKQZ-6N91 | Registered charity | Active | Markham | $4K |
| Kingdom ON The Rock Ministries CA-E-KPPQ-KQ7W | Registered charity | Active | MARKHAM | $4K |
| The Classic Cuisine CA-E-VVWD-SP15 | Licensed business | Cancelled | Toronto | — |