This presentation from AWS re:Invent 2025 showcases the migration and modernization journey of the London Stock Exchange Group (LSEG) as they transitioned to the cloud. The session provides a detailed blueprint for achieving cloud success, highlighting the key strategies, technologies, and best practices employed by LSEG during their transformation.
Drivers for Cloud Adoption
Increasing business agility and scalability to meet growing market demands
Improving operational efficiency and reducing infrastructure maintenance overhead
Enhancing data and application security through cloud-native security features
Accelerating innovation and time-to-market for new products and services
Migration Approach
Adopted a phased, "lift-and-shift" approach to migrate existing on-premises workloads to the cloud
Leveraged AWS Server Migration Service (SMS) and AWS Database Migration Service (DMS) to automate and streamline the migration process
Implemented a "cloud-first" strategy for all new application development and deployments
Modernization Initiatives
Refactored legacy applications to take advantage of cloud-native services and architectures
Migrated to managed database services, such as Amazon RDS and Amazon DynamoDB, to reduce operational overhead
Adopted a microservices-based approach, utilizing AWS Lambda and Amazon ECS for improved scalability and flexibility
Implemented DevOps practices, including CI/CD pipelines and infrastructure-as-code (IaC) using AWS CodePipeline and AWS CloudFormation
Security and Compliance
Leveraged AWS Identity and Access Management (IAM) to enforce granular access controls and role-based permissions
Implemented comprehensive data encryption, both at rest and in transit, using AWS Key Management Service (KMS)
Achieved compliance with industry regulations and standards, such as PCI-DSS and GDPR, through the use of AWS Artifact and AWS Config
Operational Efficiency
Utilized Amazon CloudWatch for centralized monitoring and logging of cloud resources
Automated infrastructure provisioning and scaling using AWS Auto Scaling and AWS Lambda
Optimized costs through the use of AWS Savings Plans and Reserved Instances
Business Impact
Reduced infrastructure maintenance and operational costs by 35% in the first year
Improved application performance and availability, leading to a 20% increase in customer satisfaction
Accelerated time-to-market for new products and services by 40%, enabling LSEG to stay ahead of the competition
Enabled the development of innovative, data-driven solutions leveraging cloud-native services and machine learning
Key Takeaways
Adopt a phased, "lift-and-shift" approach to cloud migration, followed by a continuous modernization strategy
Leverage managed services and cloud-native architectures to reduce operational overhead and improve scalability
Implement robust security and compliance measures to protect sensitive data and meet industry regulations
Automate infrastructure provisioning and scaling to improve operational efficiency and cost optimization
Empower teams to innovate and deliver new products and services faster through cloud-enabled capabilities
Conclusion
The LSEG case study presented at AWS re:Invent 2025 provides a comprehensive blueprint for organizations looking to successfully migrate and modernize their IT infrastructure in the cloud. By adopting a strategic, multi-phased approach and leveraging the breadth of AWS services, LSEG was able to achieve significant improvements in business agility, operational efficiency, and innovation.
These cookies are used to collect information about how you interact with this website and allow us to remember you. We use this information to improve and customize your browsing experience, as well as for analytics.
If you decline, your information won’t be tracked when you visit this website. A single cookie will be used in your browser to remember your preference.
