- Organisation
- London Stock Exchange Group
- Predecessor
- approximately 30 data systems, 1,200 datasets and multiple product stacks and data models
- Destination
- Microsoft Fabric lakehouse platform
- Workload
- enterprise data engineering, analytics and governed data access
- Stage
- Operational phased implementation
- Retirement status
- Consolidation is underway; complete source-system retirement is not stated.
- Confidence
- High
- Next trigger
- A dated cutover, formal retirement statement or material later implementation milestone.
Programme context
LSEG is consolidating approximately 30 data systems and 1,200 datasets, representing about 33 petabytes, into a Microsoft Fabric lakehouse platform.
Why this matters: This record identifies a named Irish or UK organisation, a bounded predecessor state, a destination platform, an affected workload and a source-stated operational stage.
Migration timeline
| Date or stage | Milestone | What changed | Evidence status |
|---|---|---|---|
| Predecessor state | Distributed data estate | LSEG had about 30 systems, 1,200 datasets and multiple data models. | Source stated |
| Operational phase | Fabric lakehouse adopted | Data workloads began consolidating into Microsoft Fabric. | Source stated |
| 18 November 2025 | Dated publication | Microsoft published the operational phased case. | Source stated |
Workload migration matrix
| Workload | Predecessor | Destination | Status by 27 Jul 2026 |
|---|---|---|---|
| enterprise data engineering, analytics and governed data access | approximately 30 data systems, 1,200 datasets and multiple product stacks and data models | Microsoft Fabric lakehouse platform | Operational phased implementation |
Implementation and architecture
- The target architecture uses a Microsoft Fabric lakehouse.
- The reported data estate is approximately 33 petabytes.
- The programme standardises access across multiple product and data-model boundaries.
Known unknowns and contradictions
- Exact cutover dates for individual systems are not stated.
- The number of fully retired source systems is not stated.
- The publication does not support estate-wide completion.
No missing fact is inferred to broaden the source-supported platform-change claim.
PlatformTrace analysis
The dated source supports an operational phased consolidation into Microsoft Fabric. It does not state that all source systems, product stacks or distribution models have been retired.
Performance, cost, uptime and operational outcomes remain attributed source claims unless independently stated otherwise.
Evidence ledger
- London Stock Exchange Group — Microsoft customer story, 18 November 2025
Dated first-party source describing the scale, source-system count and Microsoft Fabric lakehouse programme.
Approval: Issue #47 standing publication authority and the completed 27 July 2026 five-lane central filter.
Corrections and updates
27 July 2026 — Initial long-form Verified dossier published from the completed five-lane Ireland/UK intake and corrected central filter. Later milestones will be appended rather than silently replacing this state.