Building an ensemble forecasting system

Bruno describes running multiple ML models in parallel, merging outputs, and improving MAPE from ~10% to ~2%.

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In this episode of Run the Numbers, CJ sits down with Bruno Annicq, CFO of Wellhub (formerly Gympass), to unpack a practical finance playbook built around cash discipline, sustainable growth, and simplicity. Bruno explains how he rebuilt forecasting using an AI-driven, probabilistic ensemble model, moving teams beyond single-scenario planning. They also dig into his EMPOWER planning framework, usable OKRs, and why tighter alignment between finance, HR, and wellbeing is becoming a durable lever for long-term performance.

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LINKS:

Bruno on LinkedIn: https://www.linkedin.com/in/bannicq/

Wellhub: https://wellhub.com/

CJ on LinkedIn: https://www.linkedin.com/in/cj-gustafson-13140948/

Mostly metrics: https://www.mostlymetrics.com

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https://youtu.be/iNHbkcG7YEo

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