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MIAX research notebook

Read the disclosures. Follow the relationships. Keep the dates in view.

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SEC submissions · retrieved 2026-09-08 · 8005 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 4 · Ownership change

    Report date 2026-09-02 · 0002080878-26-000016

  2. 4 · Ownership change

    Report date 2026-09-03 · 0002080671-26-000016

  3. 4 · Ownership change

    Report date 2026-09-03 · 0002080477-26-000018

  4. 4 · Ownership change

    Report date 2026-09-02 · 0002079445-26-000017

  5. 4 · Ownership change

    Report date 2026-09-02 · 0001959770-26-000012

  6. 4 · Ownership change

    Report date 2026-08-18 · 0002080878-26-000014

  7. 4 · Ownership change

    Report date 2026-08-18 · 0002080477-26-000016

  8. 4 · Ownership change

    Report date 2026-08-17 · 0001628280-26-057950

  9. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001628280-26-054575

  10. 8-K · Current report

    Report date 2026-08-05 · 0001438472-26-000040 · Items 2.02,9.01

  11. 8-K · Current report

    Report date 2026-07-20 · 0001628280-26-049014 · Items 8.01

  12. 8-K · Current report

    Report date 2026-06-17 · 0001438472-26-000036 · Items 3.02

  13. 8-K · Current report

    Report date 2026-06-16 · 0001438472-26-000032 · Items 5.07

  14. 8-K · Current report

    Report date 2026-06-15 · 0001438472-26-000030 · Items 5.02

  15. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001628280-26-032565

  16. 8-K · Current report

    Report date 2026-05-06 · 0001628280-26-031291 · Items 2.02,9.01

  17. DEF 14A · Proxy statement

    Report date 2026-06-16 · 0001628280-26-027312

  18. 8-K · Current report

    Report date 2026-04-23 · 0001628280-26-027311 · Items 5.02

  19. 8-K · Current report

    Report date 2026-04-07 · 0001438472-26-000026 · Items 5.02

  20. 8-K · Current report

    Report date 2026-03-24 · 0001628280-26-021455 · Items 5.02

  21. 10-K · Annual report

    Report date 2025-12-31 · 0001438472-26-000023

  22. 8-K · Current report

    Report date 2026-02-25 · 0001438472-26-000019 · Items 3.02

  23. 8-K · Current report

    Report date 2026-02-25 · 0001438472-26-000017 · Items 2.02,9.01

  24. 8-K · Current report

    Report date 2026-02-18 · 0001438472-26-000012 · Items 3.02

  25. 8-K · Current report

    Report date 2026-02-09 · 0001438472-26-000010 · Items 3.02

  26. 8-K · Current report

    Report date 2026-01-20 · 0001438472-26-000008 · Items 8.01,9.01

  27. 8-K · Current report

    Report date 2025-12-15 · 0001628280-25-057039 · Items 3.02,8.01

  28. 8-K · Current report

    Report date 2025-11-25 · 0001438472-25-000016 · Items 8.01,9.01

  29. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001438472-25-000011

  30. 8-K · Current report

    Report date 2025-11-05 · 0001628280-25-049650 · Items 2.02,9.01

  31. 8-K · Current report

    Report date 2025-10-03 · 0001628280-25-044597 · Items 5.02

  32. 8-K · Current report

    Report date 2025-08-18 · 0001438472-25-000003 · Items 1.02

  33. 8-K · Current report

    Report date 2025-08-15 · 0001628280-25-040532 · Items 3.02,8.01

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-09-07 · 2026 Q2: filings in this completed quarter; not a live transaction feed

Purchases and sales include open-market or private transactions. Grants, exercises and tax withholding are shown separately. Amendments and joint reports can overlap; rows are not a net-buying score. Prices retain the filing's units; consult its footnotes.

Transaction rows by code · counts, not monetary totals
Purchase: 0 transaction rows0PSale: 33 transaction rows33SGrant / award: 58 transaction rows58AExercise / conversion: 68 transaction rows68MTax / exercise payment: 11 transaction rows11FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

171 matching transaction rows. Showing 101–150.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-05-19
2026-05-21
HORIZON KINETICS ASSET MANAGEMENT LLCJ · Other (see filing)
Disposed
Common Stock2455744.00.0
2026-05-15
2026-05-18
Emmons Lance
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock35000.056.36
2026-05-11
2026-05-13
Gallagher Thomas P.M · Exercise / conversion
Acquired
Common Stock24999.012.0
2026-05-11
2026-05-13
Gallagher Thomas P.M · Exercise / conversion
Disposed
Incentive Stock Option (Right to Buy)
Derivative security
24999.00.0
2026-05-05
2026-05-07
Gallagher Thomas P.
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock15771.012.0
2026-05-05
2026-05-07
Gallagher Thomas P.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock15771.047.92
2026-05-05
2026-05-07
Gallagher Thomas P.
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
15771.00.0
2026-05-04
2026-05-05
Comly Barbara J.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock28000.047.26
2026-05-04
2026-05-05
Comly Barbara J.
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock28000.012.0
2026-05-04
2026-05-05
Comly Barbara J.
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
28000.00.0
2026-05-04
2026-05-05
Eckert Kurt M.
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock5625.012.0
2026-05-04
2026-05-05
Eckert Kurt M.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock5625.047.29
2026-05-04
2026-05-05
Eckert Kurt M.
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Stock Option (Right to Buy)
Derivative security
5625.00.0
2026-05-04
2026-05-05
Brown Shelly
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock16000.012.0
2026-05-04
2026-05-05
Brown Shelly
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock16000.047.28
2026-05-04
2026-05-05
Brown Shelly
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
16000.00.0
2026-05-04
2026-05-05
Schafer Douglas M. JR
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock48000.047.25
2026-05-04
2026-05-05
Schafer Douglas M. JR
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock48000.012.0
2026-05-04
2026-05-05
Schafer Douglas M. JR
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
48000.00.0
2026-05-04
2026-05-05
Teekell Judson Gray
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock3000.047.3
2026-05-04
2026-05-05
Gallagher Thomas P.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock54229.047.26
2026-05-04
2026-05-05
Gallagher Thomas P.
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock54229.012.0
2026-05-04
2026-05-05
Gallagher Thomas P.
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
54229.00.0
2026-05-04
2026-05-05
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock11000.012.0
2026-05-04
2026-05-05
Deitzel Edward
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock11000.047.28
2026-05-04
2026-05-05
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
11000.00.0
2026-04-15
2026-04-17
Gallagher Thomas P.
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock70001.012.0
2026-04-15
2026-04-17
Gallagher Thomas P.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock49900.043.68
2026-04-15
2026-04-17
Gallagher Thomas P.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock70001.043.36
2026-04-15
2026-04-17
Gallagher Thomas P.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock104124.043.36
2026-04-15
2026-04-17
Gallagher Thomas P.
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
70001.00.0
2026-04-15
2026-04-17
Comly Barbara J.
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock29667.043.64
2026-04-15
2026-04-17
Comly Barbara J.
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock29667.012.0
2026-04-15
2026-04-17
Comly Barbara J.
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
29667.00.0
2026-04-09
2026-04-10
Beckelman JohnM · Exercise / conversion
Acquired
Common Stock8667.012.0
2026-04-09
2026-04-10
Beckelman JohnM · Exercise / conversion
Disposed
Stock Option (Right to Buy)
Derivative security
8667.00.0
2026-04-08
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock7572.042.02
2026-04-08
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock7572.012.0
2026-04-08
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
7572.00.0
2026-04-08
2026-04-09
Brown Shelly
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock16434.012.0
2026-04-08
2026-04-09
Brown Shelly
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock16434.042.08
2026-04-08
2026-04-09
Brown Shelly
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
16434.00.0
2026-04-07
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock762.042.0
2026-04-07
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock4001.042.0
2026-04-07
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock4001.012.0
2026-04-07
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock762.012.0
2026-04-07
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
4001.00.0
2026-04-07
2026-04-09
Deitzel Edward
10b5-1 checkbox reported
M · Exercise / conversion
Disposed
Nonqualified Stock Option (Right to Buy)
Derivative security
762.00.0
2026-04-07
2026-04-09 · Amendment
Brown Shelly
10b5-1 checkbox reported
M · Exercise / conversion
Acquired
Common Stock900.012.0
2026-04-07
2026-04-09 · Amendment
Brown Shelly
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock900.042.0

Identity & relationships

Wikidata structured data · retrieved 2026-09-07 · 1611 unambiguous CIK-linked entities; coverage is incomplete

These are sourced identity and relationship claims, with incomplete coverage. Headquarters locations do not describe sales, assets or operating exposure.

SEC issuer · 0001438472MIAMI INTERNATIONAL HOLDINGS, INC.

No parent relationship is available in this import; this is not proof of independence.

No verified LEI join available.

GLEIF legal entity reference data · retrieved 2026-09-07 · 1177 checked identities; 0 unavailable records

Search names and former names
  • MIAMI INTERNATIONAL HOLDINGS INC · former SEC name · 2008-06-23 to 2008-06-23

Revenue in constant purchasing power

USD revenue expressed in 2026-07 consumer-price dollars. Each annual period uses a CPI-U average weighted by the days in its actual reporting interval. This is a purchasing-power comparison, not a company-specific price or volume measure.

Year endedReported USD revenueCPI-adjusted USD revenue
2024-12-31$1.14B$1.21B
2023-12-31$1.04B$1.14B

Bureau of Labor Statistics · retrieved 2026-09-08 · 9 selected series; gaps remain missing

Explore the CPI history ↗