Jack's Stir Brew Coffee
Coffee · 5+ locations · NYC, Amagansett NY, Sag Harbor NY, New Canaan CT
Jack's Stir Brew built its name on organic, fair-trade coffee and a patented brewing method since 2003. Founder Jack Mazzola stepped back in 2020, and investment firm Feenix Venture Partners now holds majority control after merging the chain with a wine bar business in 2022.
The Big Picture
Jack's Stir Brew built its reputation as a scrappy, organic, fair-trade coffee shop when it opened on West 10th Street in 2003. Founder Jack Mazzola stepped away from day-to-day operations in 2020, and New York investment firm Feenix Venture Partners became majority owner in 2022 after merging the chain with wine bar operator Vin Sur Vingt to form TenEleven Hospitality. The cafés still carry Jack's name, but the company now answers to an investment firm's multi-brand portfolio, not the founder who started it.
The Dirty Details
Ownership
Feenix Venture PartnersPrivate Equity
Feenix Venture Partners is a New York investment firm founded in 2017 that provides growth capital to small and mid-sized consumer businesses through both debt and equity; its wider portfolio includes Ted's Bulletin, The Slanted Door, and Capital Tacos. Its three Ferret companies show the full range of what that can mean: majority owner of Jack's Stir Brew after a 2022 debt-to-equity conversion, a lender to Bareburger whose 2018 loan never converted, and an investor in OddFellows on undisclosed terms. The label on the check matters less than whether control ever changes hands.
See all Feenix Venture Partners companies on FerretWhat do these scores mean? Learn more.
Make a New Choice
Company data last updated July 2026
How does one person build and research all this? They don't: here's how it actually works. Verdicts are our opinions, based on the public sources cited above as of July 2026. Spotted something off? or learn more.