| 4021 | Seng Yew Scaffolding & Engineering Pte. Ltd. 200903506W | 启用 |
| 4022 | Sing Ming Engineering 52928328W | 启用 |
| 4023 | Sanyi Engineering Pte. Ltd. 200822488D | 启用 |
| 4024 | Scare Crow Contractor 52937677J | 启用 |
| 4025 | Sin Hong Ji Engineering Pte. Ltd. 200818698E | 启用 |
| 4026 | Shanghoe Engineering Pte. Ltd. 200815726Z | 启用 |
| 4027 | Shinneo Project Services 53134307C | 启用 |
| 4028 | Steeltech Engineering And Constructions 53050975W | 启用 |
| 4029 | S Lite (m & E) Engineering 53047728M | 启用 |
| 4030 | Sierra Engineering Pte. Ltd. 200907399C | 启用 |
| 4031 | Sun Zhen Builders Pte. Ltd. 200903651C | 启用 |
| 4032 | Sin Hua Engineering Pte. Ltd. 200809199C | 启用 |
| 4033 | S&c Equipment Services 53047064X | 启用 |
| 4034 | Soonly Hwa Build Iron Structure Furniture Contractor 52937224W | 启用 |
| 4035 | S & L Plasterceil Decor 52907253W | 启用 |
| 4036 | Sin Yah Aluminium Works 52876765L | 启用 |
| 4037 | Spring Nature Services 53138662K | 启用 |
| 4038 | South Asia Metal Works 52629000E | 启用 |
| 4039 | Sheng Lee Hardware & Trading 52261100A | 启用 |
| 4040 | Sante Machinery Pte Ltd 199802669G | 启用 |
| 4041 | Summer Pond & Landscaping Pte. Ltd. 200307000D | 启用 |
| 4042 | See Construction & Trading 42653200K | 启用 |
| 4043 | Steeltech's Engineering Contractors Pte. Ltd. 200802813C | 启用 |
| 4044 | Soon Li Construction 51324700M | 启用 |
| 4045 | Spring Engineering Pte. Ltd. 200206633C | 启用 |
| 4046 | Sock Kweng Construction Pte Ltd 200108065D | 启用 |
| 4047 | Singapore Jinggong Steel Structure Pte. Ltd. 200805088W | 启用 |
| 4048 | Siong Fu Construction Pte. Ltd. 200506257D | 启用 |
| 4049 | Sunator Construction & Engineering Pte. Ltd. 200307119H | 启用 |
| 4050 | Stag Asia (s) Pte. Ltd. 200608377Z | 启用 |