| 1 | TUAN CUONG JSC | 2005 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Pham Thi Bich | Producing building materials from clay | Private economic |
| 2 | MAY HONG CO., LTD. | 2004 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Thi Luong | Scrap recycling | Private economic |
| 3 | DAT PHAT MANUFACTURING AND TRADING COMPANY LTD. | 2005 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Van Chinh | Wholesale of metals and metal ores | Private economic |
| 4 | SANG THUY COMPANY LTD. | 2005 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Van Thinh | Producing iron, steel, cast iron | Private economic |
| 5 | Cuong Dung CO., LTD. | 2005 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Van Van | Cast iron and steel | Private economic |
| 6 | HOANG PHAT STEEL INVESTMENT CO., LTD. | 2022 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Thi Luong | Wholesale of metals and metal ores | Private economic |
| 7 | VINA ROOF CONSTRUCTION DEVELOPMENT CO., LTD. | 2023 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Dang Hang Ny | Building houses to live in | Private economic |
| 8 | TAN DAI THANG STEEL TRADING CO., LTD. | 2022 | Ma Ong Industrial Cluster, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Thi Hoa | Wholesale of metals and metal ores | Private economic |
| 9 | CONG HONG STEEL PRODUCTION AND TRADING CO., LTD. | 2023 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Dinh Thanh | Wholesale of metals and metal ores | idpvn.com |
| 10 | DAI LOC STEEL MANUFACTURING AND TRADING CO., LTD. | 2019 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Pham Ngoc Anh | Producing iron, steel, cast iron | idpvn.com |
| 11 | HUNG THINH - Ton Viet NhatSTEEL MANUFACTURING AND TRADING CO., LTD. | 2018 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Khac Hung | Wholesale of metals and metal ores | idpvn.com |
| 12 | MINH LONG STEEL TRADING AND MANUFACTURING CO., LTD. | 2010 | Lot 11, Ma Ong Industrial Cluster, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Pham Dang Quang | Wholesale of other machinery, equipment and spare parts | idpvn.com |
| 13 | NINH TRANG STEEL TRADING AND MANUFACTURING CO., LTD. | 2015 | Lot 247A, Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Van Hoan | Wholesale of metals and metal ores | idpvn.com |
| 14 | ATS STEEL IMPORT & TRADING CO., LTD. | 2022 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Anh Thang | Wholesale of metals and metal ores | idpvn.com |
| 15 | AN PHAT BN STEEL CO., LTD. | 2022 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Thi Huong | Wholesale of metals and metal ores | idpvn.com |
| 16 | MINH HONG STEEL TRADING CO., LTD. | 2022 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Pham Thi Hong | Wholesale of metals and metal ores | idpvn.com |
| 17 | TAN TAM STEEL TRADING AND PRODUCTION CO., LTD. | 2022 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Van Tan | Producing iron, steel, cast iron | idpvn.com |
| 18 | Chu Nghia IMPORT AND TRADING CO., LTD. | 2016 | Ma Ong Industrial Complex, Chua Dan Street, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Phan Van Diem | Wholesale of other machinery, equipment and spare parts | idpvn.com |
| 19 | VU THUY CO., LTD. | 2017 | CCN Ma Ong (For hire Minh Trang Trading and Production Co., Ltd), Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Dao Van Chuyen | Wholesale of solid, liquid, gaseous fuels and related products | idpvn.com |
| 20 | HOANG GIA THAI CONSTRUCTION AND SERVICES CO., LTD. | 2014 | Lot 247A, Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Van Thi | Forging, stamping, pressing and rolling metal; metal powder smelting | idpvn.com |
| 21 | NAM THANG STEEL MECHANICAL ENTERPRISE (TN) | 2002 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Pham Van Thang | Forging, stamping, pressing and rolling metal; metal powder smelting | idpvn.com |
| 22 | TAN CUONG PRIVATE ENTERPRISE | 2005 | Ma Ong Industrial Cluster, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Van Thi | Producing iron, steel, cast iron | idpvn.com |
| 23 | BINH MINH COOPERATION | 2005 | Office Lot No. 16 Ma Ong Industrial Cluster, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Tran Thi Minh Trang | Producing iron, steel, cast iron | idpvn.com |
| 24 | POWERFUL MECHANICAL COOPERATION | 2004 | Ma Ong Industrial Complex, Dinh Bang Ward, Tu Son City, Bac Ninh, Vietnam | Do Van Thuan | Cast iron and steel | idpvn.com |
