| Operationele lease personenwagens en bedrijfswagens | TenneT TSO B.V. | Athlon Car Lease Nederland B.V. | — | 11 ago 2026 |
| TenneT Offline Evenementen | TenneT TSO B.V. | Obsession B.V. | — | 11 ago 2026 |
| Publicatie van opdracht onderhandse onderhouds tender Tensec 2.0 | TenneT TSO B.V. | Honeywell Building Solutions | 10.000.000 € | 21 jul 2026 |
| Lead Forward Programme & Emerging Leadership Programme | TenneT TSO B.V. | Leeuwendaal Advies B.V. | 1.640.900 € | 2 jul 2026 |
| Europoort 380 kV GIS/GIL - Section 2 | TenneT TSO B.V. | GE Nederland B.V. | 35.000.000 €RV | 1 jun 2026 |
| Europoort 380 kV GIS/GIL - Section 1 | TenneT TSO B.V. | Hitachi Energy The Netherlands BV | 35.000.000 €RV | 1 jun 2026 |
| MidFour | TenneT TSO B.V. | Kuijpers Projecten B.V. | — | 7 may 2026 |
| Integraal Ontwerpteam De Hes Kantoorlocatie | TenneT TSO B.V. | Mecanoo architecten b.v. | 2.897.500 € | 7 may 2026 |
| 181412 - Engineering Services - HVDC Landstations IJmuiden Ver Alpha, Beta & Gamma - Civiel Bouwkundig | TenneT TSO B.V. | ARCADIS Nederland B.V. | 5.450.000 € | 10 abr 2026 |
| Supply of Synchronous Condensers AHSC01/EWSC01/NDSC01 | TenneT TSO B.V. | Siemens Energy B.V. | — | 24 mar 2026 |
| Promotieartikelen | TenneT TSO B.V. | Keiretsu Europe B.V. | 5.700.000 €RV | 17 mar 2026 |
| Bloemen en attenties | TenneT TSO B.V. | PIMM Solutions B.V. | 5.700.000 €RV | 17 mar 2026 |
| Supply of Advanced Power Flow Control | TenneT TSO B.V. | Acciona Industrial NL B.V. | 30.000.000 € | 11 mar 2026 |
| DevOps Team 'Java Development team for EPN Toolchain' | TenneT TSO B.V. | FLORIJN App & Web Solutions B.V. | 7.802.000 € | 26 ene 2026 |
| DevOps Team 'Scientific Development & Data teams' | TenneT TSO B.V. | VORtech B.V. | 12.040.600 € | 26 ene 2026 |
| DevOps Team 'ARTeMIS' | TenneT TSO B.V. | Sopra Steria Nederland B.V. | 10.847.200 € | 26 ene 2026 |
| DevOps Team 'Decommissioning LIBRA' | TenneT TSO B.V. | Sopra Steria Nederland B.V. | 10.958.640 € | 23 ene 2026 |
| DevOps Teams 'Customer Admission' | TenneT TSO B.V. | Sopra Steria Nederland B.V. | 36.164.856 € | 22 ene 2026 |
| DevOps Team 'FDA' (FRR Dimensioning Application) | TenneT TSO B.V. | Sopra Steria Nederland B.V. | 3.740.933 € | 12 ene 2026 |
| Global mobility | TenneT TSO B.V. | EY Belastingadviseurs B.V. | 7.200.000 € | 5 ene 2026 |
| Dynamic Security Assessment (DSA) software and services | TenneT TSO B.V. | Powertech Labs Inc | — | 22 dic 2025 |
| Bouwrijp maken bouwterrein landstation Nederwiek 2 | TenneT TSO B.V. | JdB GWW B.V. | 781.400 € | 5 dic 2025 |
| WGA ERD verzekering | TenneT TSO B.V. | NN Group | 15.000.000 € | 10 nov 2025 |
| SouthWest 380kV East - Steel Road Plates - TenneT TSO B.V. | TenneT TSO B.V. | Martens en Van Oord Aannemingsbedrijf B.V. | 38.491.200 € | 14 oct 2025 |
| Wide Area Monitoring System (WAMS) | TenneT TSO B.V. | Electric Power Group, LLC | 10.900.000 € | 13 oct 2025 |
| Always Energy | TenneT TSO B.V. | Fitter Nederland B.V. | 7.200.000 € | 10 jul 2025 |
| Perceel 2: Specialistische technische ingenieurs- en adviesdiensten DC/CC | TenneT TSO B.V. | Arup B.V., HaskoningDHV Nederland B.V., Iv Industrie +3 más | 2.833.001 € | 1 jul 2025 |
| Perceel 1: Integrale projecten | TenneT TSO B.V. | ARCADIS Nederland B.V., bbn, draaijer+partners B.V. +3 más | 13.833.001 € | 1 jul 2025 |
| Pre- en In-employment screening | TenneT TSO B.V. | Levent Group B.V. | 5.700.000 € | 25 jun 2025 |
| Offshore Grid NL - Client Representative Services at Sea | TenneT TSO B.V. | Akira Energy B.V., Taylor Hopkinson Limited | — | 23 jun 2025 |