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Ensono
Ensono is the hybrid IT services consolidator formed from Acxiom's infrastructure unit, now majority-owned by KKR and run by CEO Jeff VonDeylen.
Ensono
Ensono was formed in 2015 when private equity firms Charlesbank Capital Partners and M/C Partners acquired the IT outsourcing division of Acxiom, installing Jeff VonDeylen, a former Acxiom executive, as CEO. The transaction carved out a business managing mainframe, midrange, and cloud infrastructure for mid-market and enterprise clients. Acxiom retained no ownership stake, and Ensono began life with a portfolio of long-duration managed-services contracts attached to legacy infrastructure, giving it immediate cash-flow visibility uncommon in de novo technology platforms. The firm executes a strategy centered on acquiring and operating existing IT-outsourcing contracts, then layering hybrid-cloud migration, mainframe modernization, and public-cloud management services on top of those relationships. Asset-class exposure spans enterprise IT infrastructure, mainframe-as-a-service, multi-cloud management, and security operations. Ensono has completed bolt-on acquisitions to expand geographic reach and technical capability, including the 2018 purchase of Attenda, a UK-based managed-services provider, and the 2019 integration of Wipro's hosted data-center services business. Confirmed client relationships include the Illinois Department of Innovation & Technology and the UK's Driver and Vehicle Licensing Agency (DVLA), reflecting a posture toward regulated, mission-critical workloads. The firm operates across North America and Western Europe, with delivery centers in the United States, United Kingdom, and India. Ensono has disclosed over $700 million in annual revenue (per CRN, 2023) and employs more than 2,900 people globally. Offices include Downers Grove, Illinois; London, UK; and Pune and Chennai, India. The firm is not a family office or an asset allocator; it is a portfolio company held by private equity sponsors. May 2022: Charlesbank Capital Partners and M/C Partners sold a majority stake in Ensono to KKR, valuing the firm at approximately $1.7 billion, while CEO Jeff VonDeylen and the management team retained a significant minority position (per KKR and the firm, May 2022). Ensono is structurally distinct in that it operates as a PE-backed roll-up platform within the IT-managed-services sector rather than a standalone service provider. The 2022 majority sale to KKR introduced a new capital layer explicitly focused on accelerating M&A, positioning the firm to consolidate a fragmented infrastructure-services market. This architecture — where the management team retains equity alongside sequential private equity sponsors — creates a governance model driven by acquisition-led growth and eventual liquidity events.
General information
Firm type
Asset Manager
Year founded
2015
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Downers Grove
Corporate office
Downers Grove, IL, United States
Principals
Jeff VonDeylen
CEO
Sector focus
Frequently asked questions
Who controls Ensono investment and strategic decisions?
KKR acquired a majority stake in the company in 2022 from prior sponsors Charlesbank Capital Partners and M/C Partners, inheriting board control. CEO Jeff VonDeylen and the existing management team retained a significant minority position and lead operational and strategic execution. Investment decisions — particularly M&A targeting additional managed-services contracts — are made by management in concert with the KKR-appointed board.
How did the sponsor transition from Charlesbank to KKR change the firm?
The 2022 sale provided KKR with a platform explicitly aimed at scaling through acquisition in the fragmented IT-services market. Unlike the early-stage carve-out phase under Charlesbank, the KKR era is capital-rich and focused on accelerating mainframe-to-cloud migrations, geographic expansion in Europe, and adding adjacent technical capabilities via buy-and-build. Management retained material equity, preserving operational continuity.
What does Ensono actually do for a typical client?
Ensono assumes long-term operational responsibility for a client's existing IT infrastructure stack — mainframe, midrange servers, private data centers — and then manages a phased migration of workloads toward public cloud platforms, predominantly Microsoft Azure and AWS. The firm also provides ongoing managed services for security, mainframe optimization, and hybrid-cloud operations. Many contracts originate as legacy outsourcing agreements that Ensono acquires or inherits.
Is Ensono a public company or a private entity?
Ensono is a private company. It was carved out of Acxiom in 2015 with private equity backing, majority-owned by KKR since May 2022. There is no publicly traded security, and the firm's equity is held by KKR, management, and potentially co-investors alongside KKR.
What is Ensono's known posture on acquiring mainframe workloads?
Mainframe management is a core differentiator and a primary acquisition target for the firm. Ensono actively seeks to acquire existing mainframe services contracts and modernize those workloads in-place or via re-platforming, recognizing that the shrinking pool of mainframe-literate engineers creates sticky, high-retention revenue streams. The 2019 purchase of Wipro's hosted data-center business and the 2018 Attenda deal both broadened its mainframe and infrastructure footprint.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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