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Gresham: Leadership Change
Spiros Giannaros appointed as CEO of UK fintech firm Gresham, succeeding Mark Hepsworth who transitions to board role. Giannaros was previously at Charles River Development.
Source: discovered:fintechfutures.com
The leadership read
Gresham's incoming CEO carries a specific institutional-markets pedigree: Charles River Development built its business on order management and investment operations infrastructure for asset managers, an audience that overlaps directly with Gresham's core market in financial data control and reconciliation. The appointment signals a deliberate shift toward deeper penetration of the buy-side technology stack — not merely a succession event but a commercial repositioning, tightening the firm's alignment between product architecture and institutional client workflows that increasingly demand integrated data governance alongside execution infrastructure. This is one of twelve leadership-change signals we have tracked across sectors in the last 90 days, though the comparable set here is thin on direct fintech parallels — the wider batch skews toward media, cannabis, and mining transitions. The more instructive frame is narrower: capital-markets infrastructure firms in the UK and US have been cycling in leaders with buy-side operational backgrounds, a pattern consistent with increasing pressure from asset managers to consolidate point solutions into fewer, deeper vendor relationships. Companies reaching this stage of buy-side market penetration in fintech infrastructure face rising demand for commercial leadership with enterprise SaaS and long-cycle institutional sales experience, alongside product operations leaders who can bridge reconciliation and data-control platforms with adjacent investment-workflow tooling. The market is moving toward operators who can hold a conversation at the level of CTO and COO simultaneously on the buy side.
Market context: Against a Talent Market Index of 111.4 (Hot) (up 5.2 month-on-month), EMEA is at easing (-4.4pts) on signal share.
Gresham: 2 signals in the last 90 days; 0.1% of MitchelLake's Americas signal flow; 2 tracked across 56 days.
Also at Gresham →
More signals across EMEA
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Currys PLC →CEO Alex Baldock departing Currys in autumn 2026 to join Boots. Fredrik (successor named in statement) will take over leadership.
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Supercell →Jaakko Harlas, head of investments at Supercell, departed after 12+ years. He cited family time as reason and stated no immediate plans to join another company.
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Adyen →Adyen appointed a chief product officer and an interim chief financial officer, signaling leadership restructuring to support recent acquisition integration.
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Channel 4 →Channel 4 unveiled a new commissioning structure under new CEO Priya Dogra, replacing departing Director of Programmes Ian Katz. Louisa Compton and Kiran Nataraja received promotions into the new structure, effective November 2026.
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Revolut →Revolut appointed Philip Kelvin, co-founder of Tranch, as UK CIO. Carlos Selonke, the outgoing CIO, is transitioning to lead US banking charter expansion as regional CIO.
Leadership Change · EMEA
Costain Group PLC →Alexander Vaughan, CEO and Member of Group Executive Board, has sold 42% of his shareholding, signaling potential leadership transition or confidence concerns.
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