John Collison

Overview

John Collison is an Irish entrepreneur and the co-founder and president of Stripe, the payments company he built with his older brother Patrick after both left American universities without degrees. He was 17 when the brothers’ first business was sold, 26 when a Stripe fundraising round made him Forbes’ youngest self-made billionaire, and he has since paired the Stripe presidency with a second life in Irish aviation as an investor in Weston Airport (A Touch of Business; TechCrunch).

Collison was born in 1990 and grew up in Dromineer, a village on Lough Derg in County Tipperary, where his father Denis had trained in electronic engineering and his mother Lily in microbiology (A Touch of Business). The household’s expensive satellite internet connection was, in his later telling, a window onto commerce far beyond rural Ireland — and a daily lesson in the mismatch the brothers would build Stripe to fix: software could reach anyone in the world, but getting those customers to pay online was far more cumbersome (A Touch of Business).

A first sale at 17, and its fine print

John attended Castletroy College in Limerick, where his interests ran beyond programming to debating, piano and pilot training, and in 2009 he completed the Irish Leaving Certificate with ten A grades, including eight A1 grades, before entering Harvard that September (A Touch of Business). But his business career had started two years earlier: in early 2007 he and Patrick started an e-commerce software company in Limerick, and on Y Combinator’s suggestion their project joined a similar effort by Harjeet and Kulveer Taggar, becoming associated with Auctomatic, software that helped professional sellers manage listings, inventory and sales on marketplaces such as eBay (A Touch of Business).

The Auctomatic story is usually told in one line — sold for $5 million when John was 17 — and the detail matters. The acquisition was announced on March 26, 2008 and closed on May 22, 2008, on terms of approximately $2 million in nominal cash, subject to adjustments, plus $3 million in buyer stock at an agreed reference price, so the $5 million headline described a combined transaction rather than a cash payment personally received by John (A Touch of Business). John was a principal shareholder and had helped originate the brothers’ earlier business, but the merger agreement named Patrick and the two Taggars as founders, not John — a distinction this profile preserves rather than flattening into a simple “co-founder” label (A Touch of Business). While Patrick took a role with the buyer, John stayed in Ireland to finish secondary school (A Touch of Business).

Building Stripe, and staying private

The brothers’ next project began while both were at university — Patrick at MIT, John at Harvard — and John later dated its start precisely: “The first lines of code we wrote were in October 2009” (A Touch of Business). Businesses could build a website, they found, but accepting payments meant awkward integrations and multiple financial intermediaries; the project steadily became more important than their studies, and John ultimately left Harvard without completing a degree (A Touch of Business). John and Patrick co-founded Stripe in 2010, with about $2 million in early financing reported in March 2011 and a public launch later that year (A Touch of Business).

Stripe then widened from a payment tool into financial infrastructure: Stripe Connect for platforms and marketplaces in 2012, Atlas for forming US businesses in 2016, Terminal for in-person payments in 2018, and Stripe Climate in October 2020 (A Touch of Business). The brothers kept distinct roles throughout — Patrick as chief executive, John as president — and were jointly named Ireland’s EY Entrepreneur of the Year in 2015 (A Touch of Business). After a 2016 round valuing Stripe at $9.2 billion, Forbes called John, then 26, the world’s youngest self-made billionaire, a designation that reflected an estimate of his stake in a private company rather than money held in cash (A Touch of Business). The valuation arc continued upward to $95 billion in March 2021, when Stripe raised $600 million and John, as president and co-founder, spoke for the company on European expansion (TechCrunch). It then reset: in November 2022 Stripe cut about 14% of its workforce, roughly 1,100 positions, with Patrick’s message saying he and John accepted responsibility for overestimating the internet economy’s near-term growth, and in March 2023 the company raised about $6.5 billion at a $50 billion valuation to fund employee liquidity and equity-award taxes (A Touch of Business). Later expansion reached stablecoins: Stripe agreed in October 2024 to acquire Bridge for about $1.1 billion, closing the deal on February 4, 2025 (A Touch of Business). John was also an early believer in a different kind of marketplace: he and Patrick were named among the investors in Alt’s $31 million seed and Series A rounds (Crunchbase News).

Year	Stripe milestone	Valuation context
2010–2011	Founded; public launch	About $2 million early financing reported March 2011
2016	Atlas launches	$9.2 billion round; Forbes youngest-billionaire designation
2021	European expansion push	$95 billion after a $600 million round
2023	Liquidity round for employees	About $50 billion after raising $6.5 billion
2025	Bridge acquisition closes	$91.5 billion at the time of the Weston interview

Aviation, Weston Airport and the building debate

Alongside Stripe, John pursued an interest dating back to his school years: aviation. He learned to fly at 17, piloted a four-seat, twin-engine, propeller-driven aircraft from Europe to the United States in 2017, and still regularly flies his own plane (The Currency). In August 2021 he joined an investor group that acquired a majority interest in Weston Airport near Dublin (A Touch of Business). The consortium bought the 240-acre site from Galway builder Brian Connelly at an “agricultural value” of €50,000 per acre, or €12 million in total, and has since invested millions more in the restaurant, car park, fencing, fire equipment and taxiways (The Currency). Weston already handles 34,000 aircraft movements a year, making it the second busiest airport in Ireland by that measure, much of it pilot training through the resident National Flight Centre, and Collison wants it to become Dublin’s dedicated hub for light aviation — “a launchpad, not just for planes but for careers in aviation” (The Currency). A proposal to convert a hangar into an operational base for the state’s search-and-rescue helicopter service remains under appeal with An Bord Pleanála (The Currency).

His infrastructure interest also became a public argument: in an October 2025 essay for The Irish Times, John contended that overlapping institutions, planning procedures and weak mechanisms for public trade-offs were holding back Irish building, including housing, transport and energy projects, disclosing his support for the Progress Ireland think tank (A Touch of Business). He began hosting the Stripe-produced podcast Cheeky Pint in June 2025, interviewing founders and technology leaders (A Touch of Business). As of late 2026 Stripe remained privately held, with a February 2026 employee tender offer implying a $159 billion valuation and 2025 payment volume of $1.9 trillion belonging to its business customers, not to Stripe as revenue (A Touch of Business).

What this profile does not claim

• John is not described as a contractual co-founder of Auctomatic: the merger agreement named Patrick and the Taggars as founders, though John originated the brothers’ venture and held a principal stake.
• The $5 million Auctomatic figure is not presented as cash John received: it combined about $2 million in cash with $3 million in buyer stock.
• No net-worth figure is claimed for John, since Forbes and Bloomberg estimates vary by date and were not verified in fully-read ranking sources.
• Early-life details rest on a single detailed biography that cites contemporary Irish Times school profiles; where that biography is the only source, this profile says so in its frontmatter rather than implying broader corroboration.