Mark Fiorentino

Partner at Index Ventures

San Francisco Bay Area

Overview

Mark Fiorentino is a Partner at Index Ventures, where he has invested in companies like Loop, Mercantile, and Pomelo. With a background in finance and strategy at Stripe and private equity at GI Partners, Mark has a Bachelor's degree from the University of California, Berkeley and is a Certified Sommelier at The Court of Master Sommeliers.

Work Experience

Bain Capital Ventures

Partner
2025 - Current
Board member/lead investor: Grain (Series A), Unannounced (Series C) BCV helps technical founders build businesses around their ideas. We invest early through growth, and commit -- working closely with founders on recruiting, early customers, messaging, launch and scale. Our team brings deep domain expertise in AI, fintech, cloud infrastructure, and more, and taps the unique network and portfolio of Bain Capital.

Bain Capital Ventures invests in seed to growth-stage startups that uses tech to disrupt existing markets or create entirely new ones.

baincapitalventures.com

Index Ventures

Partner
2019 - 2025
Partner focused on early and growth stage AI application SaaS, fintech, and vertical SaaS. Nearly six years I had the pleasure of serving as a Board Member/Lead Investor on ten+ high-growth companies that have raised many subsequent rounds since we partnered: RevenueCat (Series A), Loop (Series B), Pomelo (Pre-seed), Ascend (Series A), Nuvo (Pre-seed), Mercantile (Series A), Catch (Seed), Eisen (Seed), Tofu (Seed)

Index Ventures is a venture capital firm that helps the entrepreneurs turn bold ideas into global businesses.

indexventures.com