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Miami International Holdings, also known as the Financial Markets Exchange Miax, raised over $345 million IPO Wall Street debut.
The $23 priced shares exceeded 33% on the first day of trading and are listed on the New York Stock Exchange under Ticker MIAX.
| Ticker | safety | last | change | change % |
|---|---|---|---|---|
| MIAX | Miami International Holdings Inc Com USD0.001 | 31.15 | 0.00 |
0.00% |
CEO Thomas Gallagher squealed his team Open the bell on the NYSE floor Thursday.
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“We are a technology-driven leader in building and operating regulated financial markets across multiple asset classes and regions. Our MIAX exchange market is made possible through unique technologies built in-house,” according to a filing with the Securities and Exchange Commission.
“We believe that the speed and performance of our unique technology, coupled with fully integrated, award-winning customer service, is different from our competitors.”
According to the company, these asset classes include US options, stocks, futures and listings. Revenue from IPOs is directed towards general corporate purposes.

On Thursday, August 14th, 2025, Thomas Gallagher, chairman and CEO of the center’s Miami International Holdings (MIAX), was held at the company’s first public offer on the New York Stock Exchange. (Getty Images/Michael Nagle via Getty Images/Bloomberg)
Total options volume across all classes rose to a record 1.1 billion contract, up 42.9% year-on-year. The total market share is 16.2%.

NYSE traders as Miami International Holdings (MIAX) are making public on Thursday, August 14, 2025, the company’s first public offering on the floor of the New York Stock Exchange. (Getty Images/Michael Nagle via Getty Images/Bloomberg)
The exchange does not list exchange sales funds, Exchange options with ETF, Includes the iShares Bitcoin Trust ETF, Ishares Ethereum Trust, Grayscale Ethereum Mini Trust, and Bitwise Ethereum ETF.
| Ticker | safety | last | change | change % |
|---|---|---|---|---|
| ibit | Ishares Bitcoin Trust -USD ACC | 67.03 | -2.81 |
-4.02% |
| Et | Grayscale Ethereum Mini Trust [ETH] | 37.48 | -1.67 |
-4.27% |
| Eta | Isshares Ethereum Trust NPV | 34.37 | -1.53 |
-4.26% |
| etwh | There is no data available | – | – |
– |
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Downtown Miami Skyline from Miami South Channel in Miami, Florida, April 5, 2021. (Aaronp/Bauer-Griffin/GC Images/Getty Images)
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A MIAX spokesperson told Fox Business that the exchange will open a state-of-the-art trading floor in Miami in September.