Rule 144: 33,000 MIAX Shares Tied to Option Exercise

Morgan Stanley Smith Barney LLC submitted a Rule 144 notice reporting the planned sale of 33,000 shares of Common Stock related to the exercise of stock options on 05/04/2026 with cash proceeds.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC submitted a Rule 144 notice reporting the planned sale of 33,000 shares of Common Stock related to the exercise of stock options on 05/04/2026 with cash proceeds. The filing also lists recent 10b5-1 sales by Edward Deitzel: 7,572 shares for $318,161.05 on 04/08/2026 and 4,763 shares for $200,046.00 on 04/07/2026.

Key Figures

Shares to be sold: 33,000 shares 10b5-1 sale (Apr 8): 7,572 shares 10b5-1 sale (Apr 7): 4,763 shares +2 more

5 metrics

Shares to be sold 33,000 shares exercise of stock options on 05/04/2026

10b5-1 sale (Apr 8) 7,572 shares sold 04/08/2026 for $318,161.05

10b5-1 sale (Apr 7) 4,763 shares sold 04/07/2026 for $200,046.00

Proceeds reported (Apr 8) $318,161.05 proceeds from 7,572-share sale on 04/08/2026

Proceeds reported (Apr 7) $200,046.00 proceeds from 4,763-share sale on 04/07/2026

Key Terms

Rule 144, 10b5-1, Exercise of Stock Options

3 terms

Rule 144 regulatory

"144: Securities To Be Sold | Common | 05/04/2026"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

10b5-1 regulatory

"10b5-1 Sales for EDWARD DEITZEL 7 Roszel Road"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Exercise of Stock Options financial

"Common | 05/04/2026 | Exercise of Stock Options"

FAQ

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

What does MIAX Rule 144 filing report?

The filing reports a planned sale of 33,000 shares tied to an exercise of stock options on 05/04/2026. It also lists recent 10b5-1 sales by Edward Deitzel on 04/07-04/08/2026.

Who initiated the recent 10b5-1 sales in the MIAX filing?

The filing identifies Edward Deitzel as the seller under a 10b5-1 plan, reporting 7,572 shares for $318,161.05 on 04/08/2026 and 4,763 shares for $200,046.00 on 04/07/2026.

How were proceeds described for the 33,000-share transaction?

The 33,000-share transaction is tied to an exercise of stock options and is reported as a cash transaction on 05/04/2026. No further use-of-proceeds detail is provided in the excerpt.

Does this Rule 144 filing change MIAX outstanding share counts?

The filing lists only sale and exercise activity: 33,000 shares to be sold and two recent 10b5-1 sales. It does not state total outstanding share counts or ownership percentages in the provided excerpt.

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

Accepted by SEC EDGAR 05/04/2026 - 04:31 PM EDT 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	0002080671
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	EDWARD DEITZEL
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	Officer

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	33000	1556610.00	91651482	05/04/2026	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	05/04/2026	Exercise of Stock Options	Issuer			33000	05/04/2026	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 EDWARD DEITZEL 7 Roszel Road, Suite 1A Princeton NJ 08540	Common	04/08/2026	7572	318161.05
10b5-1 Sales for EDWARD DEITZEL 7 Roszel Road, Suite 1A Princeton NJ 08540	Common	04/07/2026	4763	200046.00

144: Remarks and Signature

Remarks	The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
Date of Notice	05/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/30/2025
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/ Edward Deitzel
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)