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Sponsored messages and multiple ads: Tipalti, Aleph, and Fidelity Private Shares read and discussed.

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In this episode of Run the Numbers, CJ Gustafson sits down with Brian Brown, Chief Financial Officer and Treasurer at Rocket Companies, to unpack how Rocket has built a differentiated, full-stack fintech business far beyond its mortgage roots. The conversation explores Rocket’s approach to long-tail monetization, the strategic importance of mortgage servicing, and how recapture rates become a durable competitive advantage in volatile rate environments. Brian shares lessons from leading complex M&A transactions, managing a business that reacts in real time to macro signals, and building a finance organization that prioritizes storytelling, strategy, and cross-functional thinking over pure accounting prowess. The result is a wide-ranging discussion on what traditional financial services companies can teach modern SaaS and fintech leaders about metrics, brand, and disciplined execution.

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SPONSORS:

Sage Intacct is a cloud financial management platform that replaces spreadsheets, automates workflows, and keeps your books audit-ready as you scale. It unifies accounting, ERP, and real-time reporting for finance, retail, logistics, tech, and professional services. With payback in under six months and up to 250% ROI, and eight years as the customer-satisfaction leader, Sage Intacct helps you take control of your growth: https://bit.ly/3Kn4YHt

Mercury is business banking built for builders, giving founders and finance pros a financial stack that actually works together. From sending wires to tracking balances and approving payments, Mercury makes it simple to scale without friction. Join the 200,000+ entrepreneurs who trust Mercury and apply online in minutes at https://www.mercury.com

RightRev automates the revenue recognition process from end to end, gives you real-time insights, and ensures ASC 606 / IFRS 15 compliance—all while closing books faster. For RevRec that auditors actually trust, visit https://www.rightrev.com and schedule a demo.

Tipalti automates the entire payables process—from onboarding suppliers to executing global payouts—helping finance teams save time, eliminate costly errors, and scale confidently across 200+ countries and 120 currencies. More than 5,000 businesses already trust Tipalti to manage payments with built-in security and tax compliance. Visit https://www.tipalti.com/runthenumbers to learn more.

Aleph automates 90% of manual, error-prone busywork, so you can focus on the strategic work you were hired to do. Minimize busywork and maximize impact with the power of a web app, the flexibility of spreadsheets, and the magic of AI. Get a personalised demo at https://www.getaleph.com/run

Fidelity Private Shares is the all-in-one equity management platform that keeps your cap table clean, your data room organized, and your equity story clear—so you never risk losing a fundraising round over messy records. Schedule a demo at https://www.fidelityprivateshares.com and mention Mostly Metrics to get 20% off.

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LINKS:

Brian on LinkedIn: https://www.linkedin.com/in/brian-brown-3aa37a8a/

Rocket Companies: https://rocket.com/

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

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

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