| Operationele lease personenwagens en bedrijfswagens | TenneT TSO B.V. | Athlon Car Lease Nederland B.V. | — | 11 Aug 2026 |
| TenneT Offline Evenementen | TenneT TSO B.V. | Obsession B.V. | — | 11 Aug 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. | €35,000,000RV | 1 Jun 2026 |
| Europoort 380 kV GIS/GIL - Section 1 | TenneT TSO B.V. | Hitachi Energy The Netherlands BV | €35,000,000RV | 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 Apr 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. | €5,700,000RV | 17 Mar 2026 |
| Bloemen en attenties | TenneT TSO B.V. | PIMM Solutions B.V. | €5,700,000RV | 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 Jan 2026 |
| DevOps Team 'Scientific Development & Data teams' | TenneT TSO B.V. | VORtech B.V. | €12,040,600 | 26 Jan 2026 |
| DevOps Team 'ARTeMIS' | TenneT TSO B.V. | Sopra Steria Nederland B.V. | €10,847,200 | 26 Jan 2026 |
| DevOps Team 'Decommissioning LIBRA' | TenneT TSO B.V. | Sopra Steria Nederland B.V. | €10,958,640 | 23 Jan 2026 |
| DevOps Teams 'Customer Admission' | TenneT TSO B.V. | Sopra Steria Nederland B.V. | €36,164,856 | 22 Jan 2026 |
| DevOps Team 'FDA' (FRR Dimensioning Application) | TenneT TSO B.V. | Sopra Steria Nederland B.V. | €3,740,933 | 12 Jan 2026 |
| Global mobility | TenneT TSO B.V. | EY Belastingadviseurs B.V. | €7,200,000 | 5 Jan 2026 |
| Dynamic Security Assessment (DSA) software and services | TenneT TSO B.V. | Powertech Labs Inc | — | 22 Dec 2025 |
| Bouwrijp maken bouwterrein landstation Nederwiek 2 | TenneT TSO B.V. | JdB GWW B.V. | €781,400 | 5 Dec 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 more | €2,833,001 | 1 Jul 2025 |
| Perceel 1: Integrale projecten | TenneT TSO B.V. | ARCADIS Nederland B.V., bbn, draaijer+partners B.V. +3 more | €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 |