| 1981 | Queensbay Traders Ltd
T12UF1325C | Active |
| 1982 | Quest Business Advisory Pte. Ltd.
200403702E | Active |
| 1983 | Qualify Tech Pte. Ltd.
200401288G | Active |
| 1984 | Quantum Leap Pte. Ltd.
200400724D | Active |
| 1985 | Quentech Services Pte. Ltd.
200404768D | Active |
| 1986 | Qingdao Wubin International Co., Ltd
T12UF1016K | Active |
| 1987 | Quinhin Pty Ltd (as Trustee For The Hindle Family Trust)
T12UF2576H | Active |
| 1988 | Quality@works
53086528M | Active |
| 1989 | Qi Ji Catering Pte. Ltd.
200400212R | Active |
| 1990 | Qinli Corporation Pte. Ltd.
200401556K | Active |
| 1991 | Quantum Asset Management Pte. Ltd.
200402602N | Active |
| 1992 | Quali Source International Private Limited
200401666W | Active |
| 1993 | Qi Ji Cafe Pte. Ltd.
200313034W | Active |
| 1994 | Qlk Holdings Pte. Ltd.
200311828M | Active |
| 1995 | Quad Energy Pte. Ltd.
200311585M | Active |
| 1996 | Qi Ji Retail Services Pte. Ltd.
200502526M | Active |
| 1997 | Qi Ji Bistro Pte. Ltd.
200313039M | Active |
| 1998 | Qualitas Capital Sdn Bhd
T11UF3791F | Active |
| 1999 | Quadro Associated S.a.
T11UF4608K | Active |
| 2000 | Qingdao Tongli Construction Group Co., Ltd.
T11UF3152C | Active |
| 2001 | Quantum Learning Network Singapore (pte.) Ltd.
200707098Z | Active |
| 2002 | Qiang Sheng Management Consultants (pte.) Ltd.
200804889H | Active |
| 2003 | Quezon Pte Ltd
199700114Z | Active |
| 2004 | Questek Components International Pte Ltd
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| 2005 | Quantum Chemical Technologies (s'pore) Pte Ltd
199702775G | Active |
| 2006 | Qb House Pte Ltd
200105016C | Active |
| 2007 | Quality Institute Of Learning
53228430E | Active |
| 2008 | Queen Supply
53143406X | Active |
| 2009 | Qsoft Infocomm Technology Pte Ltd
200104778E | Active |
| 2010 | Quick Distribution Pte. Ltd.
200722259D | Active |