# Jay Sullivan

> Jay Sullivan is the CEO of Fandom, the world's largest fan platform with 350 million monthly visitors spanning wikis, gaming, movies, TV, and pop culture. A Yale-trained applied mathematician turned product visionary, Sullivan built his career shepherding the open web at Mozilla—where he served as SVP of Product, COO, and Interim CEO—before stints driving product at Groupon, Facebook's Reality Labs AI team, and Twitter's consumer and revenue products. Co-inventor of three US patents and co-founder of PhoneSpots (acquired 2007), he has spent two decades building platforms at mass scale. Since joining Fandom in February 2026, he is steering the company from a Google-traffic-dependent reference destination toward a real-time, AI-powered fan engagement platform.

- **Role:** Chief Executive Officer at Fandom
- **Organizations:** Fandom, Mozilla, Twitter (X), Facebook (Meta), Groupon, PhoneSpots (co-founder), Signal Foundation (board), WineDirect (board), San Francisco SPCA (board)
- **Nationality:** American
- **Education:** B.S. Applied Mathematics, Yale University
- **Known for:** Co-inventor of three United States patents in mobile software and personalization, Led Firefox through its ascent as SVP of Product at Mozilla, championing the open web, Served as Mozilla's Interim CEO, holding the company through a pivotal leadership transition

## Career timeline

- **1999** — Co-founded PocketThis (later PhoneSpots), a mobile personalization startup
- **2007** — PhoneSpots acquired by Call Genie, Inc.
- **2007** — Joined Mozilla as SVP of Product, leading Firefox development
- **2013–2014** — Served as Chief Operating Officer and Interim CEO at Mozilla
- **2015** — Joined Groupon as SVP Consumer Product, later Chief Product Officer
- **~2018** — Joined Facebook (Meta); led Reality Labs AI Assistant development; led privacy and integrity for Messenger and Instagram Direct
- **~2020** — Joined Twitter as General Manager, Consumer and Revenue Products, overseeing engineering, product, design, research, and data science
- **2022** — Left Twitter; began advising and investing; joined boards of Signal, WineDirect, and San Francisco SPCA
- **2026-02** — Named Chief Executive Officer of Fandom

## Achievements

- Co-inventor of three United States patents in mobile software and personalization
- Led Firefox through its ascent as SVP of Product at Mozilla, championing the open web
- Served as Mozilla's Interim CEO, holding the company through a pivotal leadership transition
- Built and shipped Reality Labs' AI Assistant at Facebook/Meta
- Led Twitter's consumer and revenue product organization across engineering, design, research, and data science
- Joined Fandom as CEO, taking charge of a platform with 350 million monthly unique visitors
- Board member at Signal Foundation, the encrypted messaging nonprofit
- Co-founded PhoneSpots in 1999—a mobile personalization pioneer acquired in 2007

## Latest updates

- **2026-02** — Named CEO of Fandom, replacing Perkins Miller who departed in October 2025.
- **2026-02** — Fandom under Sullivan is pursuing AI-powered fan engagement and a pivot away from Google-traffic dependency.
- **2022-01** — Left Twitter after serving as General Manager of Consumer and Revenue Products; joined boards of Signal, WineDirect, and San Francisco SPCA.

## Links

- Website: https://fandom.com
- LinkedIn: https://www.linkedin.com/in/sullivanjay/
- YouTube: https://www.youtube.com/watch?v=O6Vs4MLBpoc

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Profile page: https://yespress.io/jay-sullivan
Published by YesPress — https://yespress.io
Last updated: 2026-05-26