Iex
New York, US · Founded 2012 · 248 employees on LinkedIn · 9 known investors
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IEX is a high-performance U.S. stock exchange offering innovative design and product offerings for equities trading with an emphasis on transparent and best-in-class performance. The company serves clients in the financial services industry including brokers and investors.
Also known as IEX · IEX Exchange · IEX Group, Inc. · Investors Exchange · Investors Exchange LLC
Founders & leadership
Iex was founded in 2012 by Ronan Ryan, Robert Park, and Bradley Katsuyama.



Investors · 9
How we know: IVP (Institutional Venture Partners)'s portfolio page · Not right? Tell us
How we know: MassMutual Ventures's portfolio page · Not right? Tell us
How we know: Sapphire Ventures's portfolio page · Not right? Tell us
How we know: Silver Lake Partners's portfolio page · Not right? Tell us
How we know: TA Associates's portfolio page · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
Company profile
researched Aug 2026IEX Group, Inc. is a financial technology company whose principal business is the Investors Exchange (IEX Exchange), a U.S. equities stock exchange headquartered in New York with its matching engine in Weehawken, New Jersey and an initial point of presence in a Secaucus, New Jersey data center. The company was founded in 2012 to mitigate the effects of high-frequency trading, began as an alternative trading system (ATS) that opened for trading on October 25, 2013, and was approved by the SEC as a national securities exchange on June 17, 2016, launching as an exchange in September 2016.
The exchange positions itself on execution quality for broker-dealers and institutional investors, offering order types (market, limit, primary peg, midpoint peg and discretionary peg), a router that accesses liquidity on IEX and away markets, market data feeds (including DEEP and downloadable historical pcap data on a T+1 basis), and a retail program. Its stated operating principles include publishing matching-engine rules, offering a limited set of order types, charging fixed fees, refusing to pay for order flow, and not offering colocation or rebates. IEX has also disclosed an options business, with a Head of Options and separate IEX Options leadership listed on its site.
Beyond the exchange, IEX operated IEX Cloud, a cloud-based financial data platform providing IEX proprietary equities data and third-party datasets via APIs; IEX Group told clients on May 31, 2024 that the business would shut down, and it closed on August 31, 2024, with assets acquired by former IEX Cloud executives who relaunched them as Blue Sky Data. IEX also previously ran a listings business, which it exited in September 2019 after listing its first company, Interactive Brokers, in October 2018.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Founder mafia
3 people who came through Iex went on to found or lead other companies.
Related companies · 7
Companies working in the same space as Iex.
Timeline · 13
launches, deals, and filingsProduct update published on the IEX site announcing the Ultra-Passive Signal.
Former IEX Cloud executives Tim Baker and Pedro Aguayo, with a silent partner, acquired the platform's infrastructure including a copy of the code and content provider agreements; terms were not disclosed. The successor platform went live in early September 2024.
IEX Group informed clients on May 31, 2024 that it would close its cloud-based data marketplace IEX Cloud; the business shut down on August 31, 2024.
IEX announced that co-founder and COO John Schwall would retire from the company by the end of 2019.
After a 13-month wait, IEX Group received SEC approval to list companies; it planned free listings for the first five years followed by a flat $50,000 annual fee.
IEX's ATS debuted a year after the company's founding and opened for trading on October 25, 2013.
IEX was founded in 2012 by Brad Katsuyama and Ronan Ryan (with co-founders Rob Park and John Schwall cited elsewhere) to mitigate the effects of high-frequency trading.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 8
primary sources listed
- Iexiextrading.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Iex do?
- IEX operates a U.S. national securities exchange built around a 38-mile fiber speed bump designed to limit high-frequency trading advantages.
- Who founded Iex?
- Iex was founded by Ronan Ryan, Robert Park, Bradley Katsuyama in 2012.
- Who are Iex's investors?
- Iex's investors include IVP (Institutional Venture Partners), Lead Edge Capital, MassMutual Ventures, Sapphire Ventures, Silver Lake Partners, TA Associates, La Caisse, Maverick Ventures and 1 more.
- Where is Iex headquartered?
- Iex is headquartered in New York, US.









