| ENQEIR841 Low Carbon Inertia Service Procurement – Phase 1 | EirGrid plc | Quarry Lane Stability Ltd. (a wholly owned subsidiary of Statkraft Ireland Limited) and 3 others | | €372,000,000 |
| ENQEIR841 Low Carbon Inertia Service Procurement – Phase 1Competitive Procedure With Negotiation | EirGrid plc | Enerco Energy Limited and 2 others | | €372,000,000 |
| BusConnects Dublin Core Bus Corridors Infrastructure Works, Client Partner ServicesCompetitive Procedure With Negotiation | National Transport Authority | Jacobs Engineering Ireland Limited | | €350,000,000 |
| Provision of 100 percent Renewable electricity supply to the Health Service Executive and Health Sector in IrelandDirect Invite – Mini-Competition | The Office of Government Procurement | Energia | | €251,221,487 |
| Datacentre, Hosting and Information Security Managed Services | Central Bank of Ireland | HCL Technologies UK Ltd | | €225,000,000 |
| UEL005F-28_Provision of Electricity Supply to the ETB, Colleges and University sectors in IrelandDirect Invite – Mini-Competition | The Office of Government Procurement | Energia | | €178,425,087 |
| The provision of a Managed Service for the Provision and Operation of the Automatic Enrolment Retirement Savings SchemeCompetitive Procedure With Negotiation | Department of Social Protection | Tata Consultancy Services Limited | | €149,805,851 |
| CFT 1863161 DEVELOPMENT AGREEMENT WITH STAGE PAYMENTS - SOCIAL HOUSING RESIDENTIAL SCHEMES - DUBLIN | Clúid Housing Association | Cairn Homes Properties Limited | | €148,531,995 |
| Provision of Unmetered Electricity Supply to to the Public Sector | The Office of Government Procurement | Energia | | €125,856,176 |
| RFT for the provision of a Team of ICT Technical Resources to provide Application Maintenance Support Services to An Garda Síochána (IPS014C)Open Procedure | The Office of Government Procurement | Vantage Resources Limited | | €120,000,000 |
| Supply and Maintenance of Passport Production Equipment, Supply of Passports and Travel DocumentsCompetitive Procedure With Negotiation | Department of Foreign Affairs/An Roinn Gnóthaí Eachtracha | Smurfit Kappa Security Concepts | | €108,900,000 |
| (SRFT) IHW034F-1-010 for the provision of Windows Desktop, Notebook Computers and Associated ICT Peripherals and Services on behalf of HEAnetDirect Invite – Mini-Competition | Asiera CLG | Dell Products Unlimited Company | | €105,000,000 |
| Request for Tender for the provision of electricity supply to Government Departments and Security Services in IrelandDirect Invite – Mini-Competition | The Office of Government Procurement | Energia | | €98,844,020 |
| CFT 3030445 ISW023F-1-007 PROJ000009323 Mini-Competition for Microsoft Solution Renewals and Associated Services for HSEDirect Invite – Mini-Competition | Health Service Executive | SoftwareONE | | €85,871,072 |
| Provision of Electricity Supply to the Local Authorities in IrelandDirect Invite – Mini-Competition | The Office of Government Procurement | Energia | | €77,149,997 |
| Supply of Natural Gas to Central Government, Local Authority and Security Services SectorDirect Invite – Mini-Competition | The Office of Government Procurement | Bord Gais Energy Limited | | €76,183,220 |
| Supply & Delivery of Rail Check value | Iarnród Eireann-Irish Rail | Arcelor Mittal | | €73,085,130 |
| Provision of Facilities Management ServicesRestricted Procedure | Dublin City University | Mitie Facilities Management Limited | | €65,000,000 |
| Provision of offsite, serviced sub-acute bed facility to St James’s HospitalOpen Procedure | St James's Hospital | Carechoice Holdings Limited | | €60,000,000 |
| Request for Tenders for the Provision of Electricity Supply to Primary and Secondary SchoolsDirect Invite – Mini-Competition | The Office of Government Procurement | Electric Ireland | | €58,720,817 |
| Request for Tenders for the Provision of Electricity Supply to Government Agencies and BodiesDirect Invite – Mini-Competition | The Office of Government Procurement | Electric Ireland | | €54,868,848 |
| RFT 1618- Design and Delivery of a Sustainable Integrated Mixed Tenure Housing Development at Kilcarbery, Clondalkin, Dublin 22. | South Dublin County Council | Adwood Limited | | €51,414,648 |
| Provision of Campus and Hybrid Working Technology Managed Service for the Central Bank of IrelandOpen Procedure | Central Bank of Ireland | PlanNet21 Communications | | €50,000,000 |
| RFT 190146 - 2902 - Tallaght Apartments; Design and Build contract for the construction of 131 Apartments at Cookstown Link Road Tallaght, Co. Dublin | South Dublin County Council | J.J. Rhatigan & Company Unlimited Company | | €47,854,828 |
| RFT for the provision of Contracted Public Employment Services for people with disabilitiesOpen Procedure | Department of Social Protection | K/C.a.S.E.S. and 17 others | | €47,105,000 |