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MGM's $100M ransomware lesson for multi-unit hospitality

MGM's 2023 ransomware shutdown cost the company an estimated $100M+. What multi-unit restaurant and hospitality groups should take from it.

Stanley Cieslak Founding Head of Brokerage May 1, 2026

In September 2023, MGM Resorts watched its slot machines go dark, its hotel keys stop working and its booking system fall over — all because a ransomware crew got an MGM IT employee on the phone, impersonated a vendor, and reset some credentials. The company reported the loss at “approximately $100M” in its 8-K. Other estimates put the all-in figure substantially higher.

That number gets attention because MGM is large. But the mechanism of the loss is what restaurant and hospitality groups in 2026 need to look at — because the same playbook is being run against operators a fraction of that size, and the policy gaps are bigger at the smaller end.

The loss had four heads

A modern hospitality cyber event doesn’t show up on one line of the income statement. MGM’s loss broke down roughly into:

  • System restoration and remediation — getting back online
  • Business interruption — revenue lost during the outage
  • Customer notification and regulatory defence — millions of records implicated
  • Third-party liability — class actions filed within days

A typical mid-market BOP doesn’t respond meaningfully to any of these. The hospitality cyber endorsements sold as an add-on to a BOP often sub-limit business interruption to $50,000–$250,000 — which won’t cover a single weekend of a multi-unit operation.

What multi-unit operators need

The right cover for hospitality groups is a standalone cyber policy with BI sized to the operation, not a bolted-on endorsement. Specifically:

  • BI limit sized to weekly revenue × expected outage. Most ransomware-driven outages now run 3–10 days even with a strong response. If you do $2M a week across your units, $250k of BI is the wrong order of magnitude.
  • POS and back-office both in scope. Many forms cover one or the other. Hospitality needs both — POS goes down, you stop taking orders; back-office goes down, you stop paying staff and suppliers.
  • PCI fines and assessments. Card-data breaches at scale trigger PCI penalties that BOP cyber endorsements rarely cover.
  • Contingent BI for upstream vendors. If your reservations platform or payment processor is the one hit, you still lose revenue.

The social-engineering vector matters

The MGM attack didn’t start with a sophisticated zero-day. It started with a phone call. That’s important because most cyber forms that do cover ransomware still treat social-engineering fraud — the wire that goes to the fake vendor, the credentials that get reset by an “IT vendor” who isn’t one — as a separate, often sub-limited, peril.

For hospitality groups with finance teams handling vendor payments at scale, a primary social-engineering limit sized to the dollars actually moving is no longer optional. It belongs alongside cyber and crime, with the wording explicit.

What to do this quarter

  1. Map your operational dependencies. Reservations, POS, payroll, vendor payments — list every system and the vendor behind it.
  2. Cost out a 7-day BI scenario. Compare to your current BI limit. The gap is your exposure.
  3. Re-shop cyber separately from the BOP. Bundled cyber endorsements are convenient at small scale. At multi-unit scale they’re a false economy.
  4. Test the social-engineering control loop. The cyber underwriter will ask. Better to know the answer.

MGM survived because MGM is large enough to absorb $100M in shock. Most multi-unit operators aren’t. The lesson isn’t that a fortress is required — it’s that the insurance limits and the form wording have to actually match the modern threat. They mostly don’t yet.

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About the author

Stanley Cieslak

Founding Head of Brokerage

Stanley brings more than 20 years in wholesale and retail insurance brokerage, and has placed over $500 million in premium across his career. He has held senior roles at AmWINS, WestRope and Jencap, building exclusive insurance programs.

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