| 3/22/2018 | 853010000000 | RAILWAY SPRING CONTROL AND CONTROL SYSTEM
| 38 | Units | 467587.19 | N/A | ULTRA TEKNOLOJI SANAYI VE TIC.A.S. |
| 3/29/2018 | 853010000000 | "DEVICES FOR RAILWAYS OR TRAMWAYS (TRAMWAY LINE EMINÖNÜ, ZEYTINBURNU AND GÜNGÖREN STATIONS SIGNALIZATION AND ELECTRONIC TRACKING SYSTEM ADDITIONAL WORKS) (YTB: 26.10.2018-500957)"
| 58 | Units | 729836.41 | N/A | ISTANBUL BÜYÜK SEHIR BELEDIYE BASKANLIGI |
| 3/13/2018 | 853010000000 | SIGNALING SYSTEM WITH ITS EQUIPMENT FOR DUDULLU-BOSTANCI METRO LINE PROJECT / PARTIAL SHIPMENT 6 (METRO LINE RAILWAY SIGNALIZATION SYSTEM PART IMPORT
| 1 | Set | 1000233.93 | N/A | SENBAY-KOLIN-KALYON DUDULLU-BOSTANCI METRO YAPIM ORTAKLIGI |
| 3/1/2024 | 853010000000 | SIGNALING SYSTEM FOR DUDULLU BOSTANCI METRO LINE PROJECT (METRO RAILWAY LINE SIGNALING SYSTEM + EQUIPMENT) | 1 | SET | 119312 | N/A | ŞENBAY-KOLİN-KALYON DUDULLU-BOSTANCI METRO YAPIM ORTAKLIĞI |
| 3/21/2024 | 853010000000 | RAILWAY SIGNALING SYSTEM EQUIPMENT/RI | 2 | UNIT | 56296 | N/A | WEBUİLD - KOLİN ADİ ORTAKLIĞI |
| 3/20/2024 | 853010000000 | SIGNALING SYSTEM FOR DUDULLU BOSTANCI METRO LINE PROJECT (METRO RAILWAY LINE SIGNALING SYSTEM + EQUIPMENT) | 1 | SET | 52752 | N/A | ŞENBAY-KOLİN-KALYON DUDULLU-BOSTANCI METRO YAPIM ORTAKLIĞI |
| 3/20/2024 | 853010000000 | SIGNALING SYSTEM FOR DUDULLU BOSTANCI METRO LINE PROJECT (METRO RAILWAY LINE SIGNALING SYSTEM + EQUIPMENT) IS FREE | 1 | SET | 25770 | N/A | ŞENBAY-KOLİN-KALYON DUDULLU-BOSTANCI METRO YAPIM ORTAKLIĞI |