STOCK TITAN

MIAMI INTERNATIONAL (MIAX) director sells 2,700 shares in planned trade

(Moderate)
(Negative)
Form Type
4

Rhea-AI Filing Summary

MIAMI INTERNATIONAL HOLDINGS, INC. director Judson Gray Teekell reported an open-market sale of 2,700 shares of Common Stock at $40.00 per share. After this transaction, he directly owns 59,338 shares. The trade was executed under a pre-established Rule 10b5-1 Plan adopted on December 17, 2025, indicating the sale was pre-planned rather than opportunistic.

Positive

  • None.

Negative

  • None.
Insider Teekell Judson Gray
Role Director
Sold 2,700 shs ($108K)
Type Security Shares Price Value
Sale Common Stock 2,700 $40.00 $108K
Holdings After Transaction: Common Stock — 59,338 shares (Direct)
Footnotes (1)
  1. F1. This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the reporting person on December 17, 2025.
Shares sold 2,700 shares Open-market sale on April 2, 2026
Sale price $40.00 per share Price for the 2,700 shares sold
Shares held after sale 59,338 shares Direct ownership following the reported transaction
Net shares sold 2,700 shares Net-sell direction in transaction summary
Rule 10b5-1 Plan regulatory
"This transaction was effected pursuant to a previously established Rule 10b5-1 Plan"
A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.
open-market sale financial
"transaction_action": "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
Form 4 regulatory
"INSIDER FILING DATA (Form 4)"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
Common Stock financial
"security_title": "Common Stock""
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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

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FAQ

What insider transaction did MIAX director Judson Gray Teekell report?

Director Judson Gray Teekell reported selling 2,700 shares of MIAX Common Stock in an open-market transaction at $40.00 per share. The filing shows this was a routine disposal executed under a pre-established Rule 10b5-1 trading plan.

How many MIAX shares does Judson Gray Teekell hold after this Form 4 sale?

After selling 2,700 shares, Judson Gray Teekell directly holds 59,338 shares of MIAX Common Stock. This context from the Form 4 indicates the sale represents only a small portion of his overall reported direct holdings.

At what price were the MIAX shares sold in Teekell’s Form 4 transaction?

The 2,700 MIAX shares were sold at $40.00 per share in an open-market transaction. This price information in the Form 4 helps quantify the total value of the reported sale for investors reviewing insider trading activity.

Was the MIAX insider sale by Judson Gray Teekell under a Rule 10b5-1 plan?

Yes. A footnote states the transaction was effected under a previously established Rule 10b5-1 Plan adopted on December 17, 2025. Such pre-planned programs automate trades and generally reduce the significance of the trade’s timing signal.

Does the Form 4 for MIAX indicate any derivative security exercises?

No derivative transactions are listed in this Form 4. The filing reports only a single non-derivative open-market sale of 2,700 shares of Common Stock, with derivativeSummary showing no remaining derivative positions disclosed here.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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*
Teekell Judson Gray

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/02/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock04/02/2026S(1)2,700D$4059,338D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 17, 2025.
Remarks:
/s/Alessandra Maria Corona Henriques, Attorney-in-Fact04/03/2026
** Signature of Reporting PersonDate
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)