MIAX insider files to sell 6,000 common shares

MIAX insider J Gray Teekell filed a notice of intent to sell 6,000 shares of common stock through Morgan Stanley Smith Barney LLC Executive Financial Services on the NYSE, with an indicated aggregate value of $280,980.00.

Rhea-AI Filing Summary

MIAX insider J Gray Teekell filed a notice of intent to sell 6,000 shares of common stock through Morgan Stanley Smith Barney LLC Executive Financial Services on the NYSE, with an indicated aggregate value of $280,980.00. The shares relate to previously exercised stock options and are scheduled for potential sale on August 4, 2026.

The filing also lists sales under a Rule 10b5-1 trading plan, including 3,000 shares of common stock on July 2, 2026 for $120,000.00 and 3,000 shares on June 2, 2026 for $128,343.00.

Key Figures

Planned shares to be sold: 6,000 shares Aggregate value of planned sale: $280,980.00 Planned sale date: 08/04/2026 +2 more

5 metrics

Planned shares to be sold 6,000 shares Common stock listed under Securities To Be Sold

Aggregate value of planned sale $280,980.00 Value associated with 6,000 common shares

Planned sale date 08/04/2026 Date tied to 6,000 common shares on NYSE

10b5-1 sale June 2026 3,000 shares for $128,343.00 Common stock sold on 06/02/2026

10b5-1 sale July 2026 3,000 shares for $120,000.00 Common stock sold on 07/02/2026

Key Terms

Form 144, Previously Exercised Stock Options, 10b5-1 Sales, Common

4 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Previously Exercised Stock Options financial

"Previously Exercised Stock Options | Issuer"

10b5-1 Sales regulatory

"10b5-1 Sales for J GRAY TEEKELL"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Common financial

"Common | 03/28/2023 | Previously Exercised Stock Options"

FAQ

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

What does MIAX’s Form 144 filing by J Gray Teekell disclose?

The filing discloses an intent to sell 6,000 shares of MIAX common stock, tied to previously exercised stock options, with an indicated aggregate value of $280,980.00 and a potential sale date of August 4, 2026.

How many MIAX (MIAX) shares are covered by the new sale notice?

The notice covers 6,000 shares of MIAX common stock. These shares are associated with previously exercised stock options and are listed for potential sale on the NYSE with an indicated aggregate value of $280,980.00.

What 10b5-1 plan sales of MIAX (MIAX) stock are reported?

Reported 10b5-1 plan sales include 3,000 shares of MIAX common stock on July 2, 2026 for $120,000.00 and another 3,000 shares on June 2, 2026 for $128,343.00, executed under a Rule 10b5-1 trading plan.

What type of MIAX (MIAX) securities are involved in the Form 144?

The Form 144 involves common stock of MIAX. The planned sale relates to 6,000 shares that stem from previously exercised stock options, to be sold through a broker on the NYSE.

Who is the broker for the MIAX (MIAX) shares listed in the Form 144?

The broker listed is Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, handling the potential sale of 6,000 MIAX common shares on the NYSE.

Does the MIAX (MIAX) Form 144 relate to stock options?

Yes. The securities to be sold are described as previously exercised stock options, with 6,000 shares of MIAX common stock listed under this category and a potential sale date of August 4, 2026.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 08/04/2026 - 04:34 PM Accepted by SEC EDGAR 08/04/2026 - 04:33 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001959770
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Miami International Holdings, Inc.
SEC File Number	001-42805
Address of Issuer	7 Roszel Road, Suite 1A Princeton NEW JERSEY 08540
Phone	6098977300
Name of Person for Whose Account the Securities are To Be Sold	J. GRAY TEEKELL
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	6000	280980.00	94907086	08/04/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/28/2023	Previously Exercised Stock Options	Issuer			6000	03/28/2023	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for J GRAY TEEKELL 7 Roszel Road, Suite 1A Princeton NJ 08540	Common	07/02/2026	3000	120000.00
10b5-1 Sales for J GRAY TEEKELL 7 Roszel Road, Suite 1A Princeton NJ 08540	Common	06/02/2026	3000	128343.00

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the previous exercise of options during the period of 03/28/2023 through 03/27/2024.
Date of Notice	08/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/17/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ J. GRAY TEEKELL
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)