Assertion Partly supported AI assessment confidence: 85% certainty 4/5 debate potential 1/5

Hieatt: 91 of Top 100 Global Banks Rely on Mainframes

Edward Hieatt · Unlocking Legacy Systems: Modernizing Mainframes via AI with Mechanical Orchard · Jun 13, 2025 · at 2:58

Edward Hieatt, Chief Customer Officer at Mechanical Orchard, details the heavy reliance of major financial institutions on legacy mainframe architectures.

0:00 / 0:05exact quote · 5.4s

720p mp4 · rendered on demand · StarZero watermark

“91 of the top hundred banks in the world by size do as well for core banking, right?”

quote is from the automated transcript, cleaned for reading: filler sounds and stutters are removed, nothing is rephrased. names can be misheard (the analysis reads context, assessments check outside sources). how →

The claim, plainly

91 of the top 100 banks in the world by size use mainframes for core banking operations.

a quote alone can be ambiguous, so this restates it with the references and context of the conversation around it resolved. AI-written; the tape below the player is the source.

Assessment

In conversational remarks, Edward Hieatt cited that '91 of the top hundred banks in the world by size' use mainframes for core banking. Industry data and vendor reports (including IBM, BMC Software, Atos, and Software AG) widely cite the canonical benchmark as '92 of the top 100 banks' using IBM mainframes for core banking and mission-critical workloads, while other analyst benchmarks place the figure at 85 of 100 (Capgemini, 2024) or 45 of 50 (IBM). The specific figure of '91' appears in vendor data as '91 of the top 100 IBM mainframe clients' using Linux on IBM Z (IBM, 2018). Because the claim accurately reflects the overwhelming reliance of top global banks on mainframes but slightly misquotes the standard industry figure of 92 (a discrepancy of ~1%), it resolves as partially true under the guideline for small numeric misses on conversational estimates.

Enterprise IT publications and vendor reports from IBM, BMC Software, and Atos cite that 92 of the world's top 100 banks run mainframes for core banking operations.
A 2024 Capgemini report found that 85 of the top 100 banks rely on mainframes for mission-critical workloads, and IBM frequently reports 45 of the top 50 banks rely on mainframes.
The exact figure '91' was cited in May 2018 by then-VP of IBM Z Software Barry Baker regarding '91 of the top 100 IBM mainframe clients' running Linux on IBM Z, but not for all top 100 global banks.

Checked against

[1] atos.net [2] share.org [3] precisely.com [4] bmc.com [5] softwareag.com [6] ibm.com [7] thenewstack.io [8] zdnet.com

"91 of the" top banks mainframe "92 of the world's top 100 banks" IBM "92 of the top 100 banks" mainframe "45 of the top 50 banks" mainframe "91 of the top 100 banks" mainframe "91 of the top 100" mainframe -podcast -"Edward Hieatt" -"Mechanical Orchard" IBM mainframe "top 100 banks"

assessed as of 2026-09-02

This assessment is an AI reading of a public statement, made against the cited references with the confidence shown. It can be wrong. The quote, the tape and the references are all on this page; if something is off, use report an error below. full disclaimer →

Mentioned

core banking top hundred banks in the world

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