Insider Shelly Brown Files Form 4 for Miami International Holdings

TL;DR

**Insider Shelly Brown filed a Form 4 for Miami International Holdings, signaling a change in ownership.**

AI Summary

This Form 4 filing indicates that Shelly Brown, a reporting insider, filed a statement of changes in beneficial ownership of securities on March 24, 2026, for Miami International Holdings, Inc. The filing itself does not detail any specific transactions (buys or sells) but rather serves as a notification that a change in ownership occurred on March 23, 2026. For investors, this matters because Form 4s are crucial for tracking insider activity, which can signal management's confidence (or lack thereof) in the company's future, potentially influencing stock price.

Why It Matters

This filing signals that an insider's ownership stake in Miami International Holdings, Inc. has changed, which can be an important indicator for investors.

Risk Assessment

Risk Level: low — This filing is a routine disclosure of insider activity and does not inherently indicate a high risk, as no specific transaction details are provided within the summary.

Analyst Insight

A smart investor would retrieve the full Form 4 document to analyze the specific transactions made by Shelly Brown, such as whether shares were bought or sold, the quantity, and the price, to gauge insider sentiment towards Miami International Holdings, Inc.

Key Players & Entities

• Brown Shelly (person) — Reporting insider
• Miami International Holdings, Inc. (company) — Issuer of securities
• 0002080506 (person) — Shelly Brown's CIK
• 0001438472 (company) — Miami International Holdings, Inc.'s CIK
• 2026-03-24 (date) — Filing Date
• 2026-03-23 (date) — Period of Report

Forward-Looking Statements

• Further details regarding the specific transactions (e.g., buy/sell, number of shares, price) will be available within the full Form 4 document. (Form 4 document) — high confidence, target: 2026-03-24

FAQ

Key Financial Figures

• $38.98 — roughout the day at prices ranging from $38.98 to $39.80. The price reported above ref
• $39.80 — he day at prices ranging from $38.98 to $39.80. The price reported above reflects the

Filing Documents

• wk-form4_1774387722.html (4)
• wk-form4_1774387722.xml (4) — 4KB
• 0001628280-26-020862.txt ( ) — 5KB

From the Filing

SEC FORM 4 SEC Form 4 FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5    Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). X Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10. 1. Name and Address of Reporting Person * Brown Shelly (Last) (First) (Middle) C/O MIAMI INTERNATIONAL HOLDINGS, INC. 7 ROSZEL ROAD, SUITE 1A (Street) PRINCETON NEW JERSEY 08540 (City) (State) (Zip) UNITED STATES (Country) 2. Issuer Name and Ticker or Trading Symbol MIAMI INTERNATIONAL HOLDINGS, INC. [ MIAX ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) EVP, Chief Strategy Officer 2a. Foreign Trading Symbol 3. Date of Earliest Transaction (Month/Day/Year) 03/23/2026 6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person 4. If Amendment, Date of Original Filed (Month/Day/Year) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/23/2026 S (1) 25,932 D $ 39.33 (2) 299,197 D Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Explanation of Responses: 1. This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the reporting person on December 22, 2025. 2. This transaction was executed in multiple trades throughout the day at prices ranging from $38.98 to $39.80. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares and prices at which the transaction was effected. Remarks: /s/Alessandra Maria Corona Henriques, Attorney-in-Fact 03/24/2026 ** Signature of Reporting Person Date Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. * If the form is filed by more than one reporting person, see Instruction 4 (b)(v). ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number. * Form 4: SEC 1474 (03-26)

View Full Filing

View this 4 filing on SEC EDGAR