MIAMI INTERNATIONAL HOLDINGS, INC.

NYSE:MIAX

Security Brokers, Dealers & Flotation Companies·PRINCETON, NJ

Miami International Holdings, Inc. (MIH), trading as MIAX, is an American company formed in 2007 that operates global financial exchanges and execution services.

CEO

Gallagher Thomas P.

Financials

2 shown

Type	Period	Ended	Filed
10-K	FY 2025	12/31/25	3/6/26	→
10-Q	Q3 2025	9/30/25	11/7/25	→

Earnings Releases (8-K)

2 shown

Filed	Period
2/25/26	Feb 2026	→
11/5/25	Nov 2025	→

News (8-K)

9 shown

Filed	Type	Description
3/2/26	Other	Unregistered Sales of Equity Securities	→
2/20/26	Other	Unregistered Sales of Equity Securities	→
2/12/26	Other	Unregistered Sales of Equity Securities	→
1/21/26	Other	Other Events	→
12/15/25	Other	Unregistered Sales of Equity Securities	→
11/26/25	Other	Other Events	→
↓

Prospectuses & Registrations

7 shown

Filed	Form	Description
3/6/26	S-8	S-8	→
12/15/25	424B4	424B4	→
12/9/25	S-1	S-1	→
8/14/25	424B4	424B4	→
8/13/25	S-8	S-8	→
8/4/25	S-1/A	S-1/A	→
↓

Filing History(148 filings)

TypeDateAccessionPeriodSize

Mar 6, 2026

0001437749-26-007252FORM 4

Mar 5, 2026

11.7 KB

4/A

Mar 6, 2026

0001437749-26-007251FORM 4/A

Mar 4, 2026

12.0 KB

4/A

Mar 6, 2026

0001437749-26-007203FORM 4/A

Mar 2, 2026

23.0 KB

S-8

Mar 6, 2026

0001438472-26-000025S-8

—

216.6 KB

10-K

Mar 6, 2026

0001438472-26-00002310-K

Dec 31, 2025

22.9 MB

Mar 5, 2026

0001437749-26-007046FORM 4

Mar 4, 2026

11.7 KB

Mar 4, 2026

0001437749-26-006880FORM 4

Mar 2, 2026

26.4 KB

8-K

Mar 2, 2026

0001438472-26-0000198-K

Feb 25, 2026

142.3 KB

8-K

Feb 25, 2026

0001438472-26-0000178-K

Feb 25, 2026

4.2 MB

8-K

Feb 20, 2026

0001438472-26-0000128-K

Feb 18, 2026

140.7 KB

Feb 20, 2026

0002079445-26-000005FORM 4

Feb 18, 2026

4.9 KB

Feb 20, 2026

0002080671-26-000002FORM 4

Feb 18, 2026

4.9 KB

Feb 20, 2026

0002080506-26-000002FORM 4

Feb 18, 2026

4.9 KB

Feb 12, 2026

0002079445-26-000003FORM 4

Feb 10, 2026

4.9 KB

Feb 12, 2026

0002080477-26-000002FORM 4

Feb 10, 2026

4.9 KB

8-K

Feb 12, 2026

0001438472-26-0000108-K

Feb 9, 2026

151.3 KB

8-K

Jan 21, 2026

0001438472-26-0000088-K

Jan 20, 2026

613.8 KB

Dec 29, 2025

0002080477-25-000012FORM 4

Dec 23, 2025

5.2 KB

Dec 17, 2025

0002080506-25-000007FORM 4

Dec 16, 2025

13.2 KB

Dec 17, 2025

0002080679-25-000002FORM 4

Dec 16, 2025

13.5 KB

8-K

Dec 15, 2025

0001628280-25-0570398-K

Dec 15, 2025

153.2 KB

Dec 15, 2025

0001437749-25-037835FORM 4

Dec 12, 2025

18.0 KB

424B4

Dec 15, 2025

0001628280-25-056883424B4

—

45.5 MB

POS AM

Dec 12, 2025

0001628280-25-056735POS AM

—

121.8 KB

EFFECT

Dec 11, 2025

9999999995-25-003689

—

1.9 KB

25 filings shown

MIAMI INTERNATIONAL HOLDINGS, INC.

Financials

Earnings Releases (8-K)

News (8-K)

Prospectuses & Registrations

Filing History(148 filings)

Ownership

Other Filings

Filed	Form	Description
3/6/26	4	4	→
3/6/26	4/A	FORM 4/A	→
3/6/26	4/A	FORM 4/A	→
3/5/26	4	4	→
3/4/26	4	4	→
2/20/26	4	4	→
↓

Filed	Form	Description
12/12/25	POS AM	POS AM	→
12/11/25	EFFECT	EFFECT	→
11/26/25	DRS	DRS	→
11/26/25	SCHEDULE 13D/A	SCHEDULE 13D/A	→
8/28/25	SCHEDULE 13D/A	SCHEDULE 13D/A	→
8/21/25	SCHEDULE 13D	SCHEDULE 13D	→
↓