Miami International Holdings (MIAX)Soros Fund Management reduced its stake -22K shares

133K

Shares reported · -22K vs prior quarter

0.07%

Disclosed portfolio weight

$5.16M

Reported value

Holdings as of

Mar 31, 2026

Filed

May 15, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Mar 20, 2026CongressDisclosed purchase of MIAX — reported range $15,001 - $50,000
2. Mar 24, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On March 24, 2026, Lee Becker informed the board of directors (the “Board”) of Miami International Holdings, Inc. (the “Company”) that he does not intend to stand for reelection at the 2026 Annual Meeting of Shareholders (the “Annual Meeting”).”
3. Apr 7, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On April 9, 2026, Miami International Holdings, Inc. (the “Company”) announced the passing of Murray Stahl, a valued member of the Company’s Board of Directors.”
4. Apr 23, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On April 23, 2026, the board of directors (the “Board”) of Miami International Holdings, Inc. (the “Company”), upon recommendation from the Nominating and Corporate Governance Committee of the Board, elected Eric Sites as a director to the Board to fill an existing vacancy, effective as of April 24, 2026, until the 2026 Annual Meeting of Shareholders or until his successor has been duly elected and qualified or…”
5. May 6, 2026Company filing · Form 8-K · ResultsReported its results

What came next

1. Jun 15, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On June 15, 2026, the Compensation Committee (the “Compensation Committee”) of the Board of Directors (the “Board”) of Miami International Holdings, Inc. (the “Company”) approved and adopted the Miami International Holdings, Inc. Senior Executive Annual Bonus Plan (the “Bonus Plan”) to be effective for performance periods beginning January 1, 2026 for executive officers and other employees as designated by the…”
2. Jun 17, 2026Company filing · Form 8-K · Unregistered sharesSold new shares without registering them
3. Aug 5, 2026Company filing · Form 8-K · ResultsReported its results

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Miami International Holdings

For Miami International Holdings, OQRO holds 2 insider filings (SEC Form 4 or Form 144) and 2 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its MIAX page.

How this filing works

• SEC Form 13F

Other disclosures at Miami International Holdings

• SEC Form 4Oct 7, 2026
• SEC Form 144Oct 2, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 11, 2026
• SEC Form 13F-HRMay 15, 2026
• House Clerk periodic transaction reportApr 7, 2026

Everything OQRO holds on this company is on its MIAX page.