Miami International Holdings Announces Closing of Secondary Public Offering of Common Stock

Miami International Holdings (NYSE: MIAX) announced the closing of a secondary public offering of 7,762,500 shares of common stock at a public offering price of $41.00 per share on December 16, 2025.

Rhea-AI Summary

Miami International Holdings (NYSE: MIAX) announced the closing of a secondary public offering of 7,762,500 shares of common stock at a public offering price of $41.00 per share on December 16, 2025.

The amount includes 1,012,500 shares sold pursuant to the underwriters' exercise in full of their option to purchase additional shares. The offering consisted entirely of secondary shares, including shares issued upon exercise of warrants by certain selling stockholders; the company did not sell any shares and received no proceeds. J.P. Morgan, Morgan Stanley and Piper Sandler led the offering. A registration statement was declared effective on December 11, 2025.

Positive

• Offering closed for 7,762,500 secondary shares at $41.00
• Underwriters exercised full option for 1,012,500 additional shares
• Led by J.P. Morgan, Morgan Stanley and Piper Sandler

Negative

• Company did not sell any shares or receive proceeds from the Offering

Argus Dec 16 session

+1.83% close to close Open Argus

Details

News Market Reaction – MIAX

On Dec 16, the day this news came out, MIAX closed 1.83% above the previous close.

Data tracked by StockTitan Argus for the Dec 16 session.

Key Figures

Secondary shares sold: 7,762,500 shares Underwriters’ option shares: 1,012,500 shares Offering price: $41.00 per share

Secondary shares sold

7,762,500 shares

Total common stock in the secondary public offering

Underwriters’ option shares

1,012,500 shares

Additional shares from underwriters’ option exercised in full

Offering price

$41.00 per share

Public offering price for secondary common shares

Historical Context

5 past events · Latest: Dec 11

5 events

1. Dec 11

   Offering pricing

   24h Move

   +2.1%

   Pricing of fully secondary offering at $41.00 per share.

2. Dec 09

   Offering launch

   24h Move

   +0.5%

   Launch of proposed fully secondary offering with underwriter option.

3. Dec 05

   Trading metrics update

   24h Move

   -3.1%

   Record 17.1% YTD market share and strong ADV growth reported.

4. Nov 20

   Tech/risk upgrade

   24h Move

   -4.1%

   Deployment of real-time risk management system on MIAX Futures.

5. Nov 10

   Leadership changes

   24h Move

   +1.1%

   Expanded executive roles to support MIAX Futures growth plans.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

secondary public offering, warrants, registration statement, Securities and Exchange Commission, +1 more

5 terms

secondary public offering financial

"announced the closing of a secondary public offering of 7,762,500 shares"

A secondary public offering is when a company sells additional shares to the public after its initial sale, often to raise more money or allow early investors to cash out. For investors, it can impact the stock's price by increasing the number of shares available, potentially making the stock more or less valuable depending on demand.

warrants financial

"including shares issued upon the exercise of warrants sold by certain"

Warrants are special documents that give you the right to buy a company's stock at a set price before a certain date. They are often used as a way for companies to attract investors or raise money, and their value can increase if the company's stock price goes up.

View in glossary

registration statement regulatory

"A registration statement relating to these securities has been filed"

A registration statement is a formal document that companies file with a government agency to offer new shares of stock to the public. It provides essential information about the company's finances, operations, and risks, helping investors make informed decisions. Think of it as a detailed product description that ensures transparency and trust before buying into a company.

Securities and Exchange Commission regulatory

"filed with the Securities and Exchange Commission ("SEC") and was"

A national government agency that enforces rules for buying, selling and disclosing information about stocks and other investments, acting like a referee and scorekeeper for financial markets. It requires companies to share clear, regular financial and business information and investigates fraud or rule-breaking, which matters to investors because those rules and disclosures help ensure fair prices, reduce hidden risks and make it easier to compare investment choices.

prospectus regulatory

"The Offering was made only by means of a prospectus. Copies of the final prospectus"

A prospectus is a detailed document that explains a company's plans for offering new shares or investments to the public. It’s important because it provides potential investors with key information about the company’s business, risks, and how they might make money, helping them decide whether to invest. Think of it as a guidebook for understanding what you're buying into.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Underwriters Exercise Full Option to Purchase Additional Shares

PRINCETON, N.J. and MIAMI, Dec. 16, 2025 /PRNewswire/ -- Miami International Holdings, Inc. ("MIAX" or the "Company") (NYSE: MIAX), a technology-driven leader in building and operating regulated financial markets across multiple asset classes, today announced the closing of a secondary public offering of 7,762,500 shares of its common stock, which included 1,012,500 shares sold pursuant to the underwriters' exercise in full of its option to purchase additional shares, at a price to the public of $41.00 per share (the "Offering"). The Offering consisted entirely of secondary shares including shares issued upon the exercise of warrants sold by certain selling stockholders of MIAX.

The Company did not sell any shares of common stock in the Offering and did not receive any proceeds from the Offering.

J.P. Morgan, Morgan Stanley and Piper Sandler acted as lead joint bookrunning managers for the offering. Raymond James, Rosenblatt, William Blair, and Keefe, Bruyette & Woods, A Stifel Company, acted as joint bookrunning managers.

A registration statement relating to these securities has been filed with the Securities and Exchange Commission ("SEC") and was declared effective on December 11, 2025. The Offering was made only by means of a prospectus. Copies of the final prospectus relating to the Offering may be obtained for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, copies of the prospectus may be obtained from: J.P. Morgan Securities LLC, Attention: c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by email at prospectus-eq_fi@jpmchase.com and postsalemanualrequests@broadridge.com; Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, NY 10014; or Piper Sandler & Co. at, 350 North 5th Street, Suite 1000, Minneapolis, MN 55401, Attention: Prospectus Department, by telephone at (800) 747-3924, or by email at prospectus@psc.com.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About MIAX
Miami International Holdings, Inc. (NYSE: MIAX) is a technology-driven leader in building and operating regulated financial markets across multiple asset classes and geographies. MIAX operates nine exchanges across options, futures, equities and international markets including MIAX^® Options, MIAX Pearl^®, MIAX Emerald^®, MIAX Sapphire^®, MIAX Pearl Equities™, MIAX Futures™, MIAXdx™, The Bermuda Stock Exchange (BSX) and The International Stock Exchange (TISE). MIAX also owns Dorman Trading, a full-service Futures Commission Merchant.

Disclaimer and Cautionary Note Regarding Forward-Looking Statements
This press release may contain forward-looking statements, including forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements describe future expectations, plans, results, or strategies and are generally preceded by words such as "may," "future," "plan" or "planned," "will" or "should," "expected," "anticipates," "draft," "eventually" or "projected." You are cautioned that such statements are based on management's current expectations and are subject to a multitude of risks and uncertainties that could cause future circumstances, events, or results to differ materially from those projected in the forward-looking statements, including the risks that actual results may differ materially from those projected in the forward-looking statements. Additional risks and uncertainties that may cause actual results to differ materially include the risks and uncertainties listed in Miami International Holdings, Inc.'s (together with its subsidiaries, the Company) public filings with the Securities and Exchange Commission. In providing forward-looking statements, the Company is not undertaking any duty or obligation to update these statements publicly as a result of new information, future events or otherwise.

All third-party trademarks (including logos and icons) referenced by the Company remain the property of their respective owners. Unless specifically identified as such, the Company's use of third-party trademarks does not indicate any relationship, sponsorship, or endorsement between the owners of these trademarks and the Company. Any references by the Company to third-party trademarks is to identify the corresponding third-party goods and/or services and shall be considered nominative fair use under the trademark law.

MIAX Contacts:

Investors
investor.relations@miaxglobal.com 

Media
media@miaxglobal.com

 

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SOURCE MIAX

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares were sold in MIAX's December 16, 2025 secondary offering?

MIAX sold 7,762,500 secondary shares in the offering.

What price per share was set in the MIAX secondary offering (MIAX) closed Dec. 16, 2025?

The offering price was $41.00 per share.

Did Miami International Holdings (MIAX) receive proceeds from the Dec. 16, 2025 offering?

No. The company did not sell shares in the offering and received no proceeds.

How many additional shares were sold under the underwriters' option in the MIAX offering?

The underwriters exercised their full option to purchase 1,012,500 additional shares.

Who were the lead joint bookrunning managers for MIAX's secondary offering?

J.P. Morgan, Morgan Stanley and Piper Sandler acted as lead joint bookrunning managers.