Skip to content

MIAX · Miami International Holdings, Inc.

Financial Services · +0.3% on Oct 16

☆ Add to watchlist

Updated Oct 17 · 6 feeds behind: Insider filings, 2 days, and 5 more · Every feed →

On this page

The market view

Price chart

The interactive MIAX chart (by TradingView) loads here.

Our take

2 rules fired on MIAX

In short: none of these rules has solid or some evidence yet, so they show no clear lean on MIAX.

How each did in past tests, against similar stocks over 3 months. Past results don't predict future ones.

The 0–100 score for MIAX, and which of these rules are open on it right now
Members see one number for how strongly these rules agree on MIAX, and the day each rule fired. Better-tested rules count more, and so do different kinds of filings that point the same way.
See pricing →
Already a member? Sign in

Compare with this company’s history

Is disclosure activity unusual?

See how many different insiders or members of Congress reported purchases or sales of MIAX. Each bar covers 28 days, by disclosure date. Several trades by one person count once in each group and period.

Latest period: Sep 21, 2026–Oct 18, 2026 · UTC dates · today is excluded

Congress purchases

Sparse history

Only 1 of 6 earlier periods had activity. That is too little recurring activity to label this count unusual.

Latest 28 days
0
Earlier median
0
Earlier range
0–1
Distinct filers per 28 daysScale: 0–1
Oct 20, 2025Oct 18, 2026
Earlier periodsLatest 28 daysEarlier median 0Limited or missing history

Who appears in the latest period?

No named filers on file for this period.

Up to three filers; one example disclosure each.

Inspect this period’s filings

The history behind this view

First stored company disclosure: Apr 6, 2026. Newest disclosure across this feed: Oct 15, 2026.

Earlier periods in the comparison: 6. Outlined periods are missing data, so they are left out of the comparison. The chart scale changes with the category.

Exact counts, dates and filings for all four categories
Insider purchases · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–0.

Insider purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 2026—Unavailable
May 4, 2026–May 31, 2026—Unavailable
Jun 1, 2026–Jun 28, 20260Partial; excluded
Jun 29, 2026–Jul 26, 20260Within stored history
Jul 27, 2026–Aug 23, 20260Within stored history
Aug 24, 2026–Sep 20, 20260Within stored history
Sep 21, 2026–Oct 18, 2026Latest period0Within stored history
Insider sales · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 9; range: 6–9.

Insider sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 2026—Unavailable
May 4, 2026–May 31, 2026—Unavailable
Jun 1, 2026–Jun 28, 20263Partial; excluded
Jun 29, 2026–Jul 26, 20269Within stored history
Jul 27, 2026–Aug 23, 20269Within stored history
Aug 24, 2026–Sep 20, 20266Within stored history
Sep 21, 2026–Oct 18, 2026Latest period1Within stored history
Congress purchases · Sparse history

Only 1 of 6 earlier periods had activity. That is too little recurring activity to label this count unusual. Earlier median: 0; range: 0–1.

Congress purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 20261Within stored history
May 4, 2026–May 31, 20260Within stored history
Jun 1, 2026–Jun 28, 20260Within stored history
Jun 29, 2026–Jul 26, 20260Within stored history
Jul 27, 2026–Aug 23, 20260Within stored history
Aug 24, 2026–Sep 20, 20260Within stored history
Sep 21, 2026–Oct 18, 2026Latest period0Within stored history
Congress sales · Sparse history

Only 0 of 6 earlier periods had activity. That is too little recurring activity to label this count unusual. Earlier median: 0; range: 0–0.

Congress sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 20, 2025–Nov 16, 2025—Unavailable
Nov 17, 2025–Dec 14, 2025—Unavailable
Dec 15, 2025–Jan 11, 2026—Unavailable
Jan 12, 2026–Feb 8, 2026—Unavailable
Feb 9, 2026–Mar 8, 2026—Unavailable
Mar 9, 2026–Apr 5, 2026—Unavailable
Apr 6, 2026–May 3, 20260Within stored history
May 4, 2026–May 31, 20260Within stored history
Jun 1, 2026–Jun 28, 20260Within stored history
Jun 29, 2026–Jul 26, 20260Within stored history
Jul 27, 2026–Aug 23, 20260Within stored history
Aug 24, 2026–Sep 20, 20260Within stored history
Sep 21, 2026–Oct 18, 2026Latest period0Within stored history
How to read this comparison

The median is the middle count in up to 12 earlier, non-overlapping 28-day periods; the range runs from the smallest to the largest count. The latest period is excluded from both. A comparison needs at least 6 earlier periods, including 3 with activity. The feed’s latest disclosure must be within 7 days of the current period’s end. This freshness check does not verify complete collection.

Insiders include individuals and reporting entities; only purchase and sale codes enter this view. Congress counts reporting members, including their disclosed family transactions. The same filer can appear in purchases and sales, so these categories should not be added into a net count.

These are stored disclosures, not a complete measure of trading. Reporting delays and collection gaps can change the comparison. More activity does not identify a motive or predict a stock’s return.

Company timeline

What has been happening?

May 1, 2026–Oct 16, 2026. Select a month in a category to inspect its records.

Company filings

Insiders

Owners & lobbying

Insiders · Oct 2026

  1. Disclosed
    Douglas M. Schafer Jr · Sale

    Transaction dated Oct 2, 2026

  2. Filed
All 38 records in this snapshot
  1. Disclosed
    Douglas M. Schafer Jr · Sale

    Transaction dated Oct 2, 2026

  2. Filed
  3. Disclosed
    Shelly Brown · Sale

    Transaction dated Sep 16, 2026

  4. Filed
  5. Disclosed
    Barbara J. Comly · Sale

    Transaction dated Sep 2, 2026

  6. Disclosed
    Douglas M. Schafer Jr · Sale

    Transaction dated Sep 2, 2026

  7. Disclosed
    Edward Deitzel · Sale

    Transaction dated Sep 3, 2026

  8. Disclosed
    Judson Gray Teekell · Sale

    Transaction dated Sep 2, 2026

  9. Disclosed
    Judson Gray Teekell · Sale

    Transaction dated Sep 2, 2026

  10. Disclosed
    Thomas P. Gallagher · Sale

    Transaction dated Sep 3, 2026

  11. Filed
  12. Disclosed
    Thomas P. Gallagher · Sale

    Transaction dated Aug 19, 2026

  13. Disclosed
    Cynthia Schwarzkopf · Sale

    Transaction dated Aug 17, 2026

  14. Disclosed
    Lance Emmons · Sale

    Transaction dated Aug 17, 2026

  15. Filed
  16. Filed
  17. Filed
  18. Disclosed
    Barbara J. Comly · Sale

    Transaction dated Aug 4, 2026

  19. Disclosed
    Douglas M. Schafer Jr · Sale

    Transaction dated Aug 4, 2026

  20. Disclosed
    Edward Deitzel · Sale

    Transaction dated Aug 4, 2026

  21. Disclosed
    Harish Jayabalan · Sale

    Transaction dated Aug 4, 2026

  22. Disclosed
    Judson Gray Teekell · Sale

    Transaction dated Aug 4, 2026

  23. Disclosed
    Kurt M. Eckert · Sale

    Transaction dated Aug 4, 2026

  24. Disclosed
    Thomas P. Gallagher · Sale

    Transaction dated Aug 4, 2026

  25. Filed
  26. Filed
  27. Disclosed
    Cynthia Schwarzkopf · Sale

    Transaction dated Jul 15, 2026

  28. Disclosed
    Barbara J. Comly · Sale

    Transaction dated Jul 13, 2026

  29. Disclosed
    Thomas P. Gallagher · Sale

    Transaction dated Jul 13, 2026

  30. Disclosed
    Barbara J. Comly · Sale

    Transaction dated Jul 2, 2026

  31. Disclosed
    Douglas M. Schafer Jr · Sale

    Transaction dated Jul 2, 2026

  32. Disclosed
    Edward Deitzel · Sale

    Transaction dated Jul 6, 2026

  33. Disclosed
    Thomas P. Gallagher · Sale

    Transaction dated Jul 7, 2026

  34. Filed
  35. Filed
  36. Filed
  37. Filed
  38. Filed

Month counts include every record on file. The lists show the newest records on this page. A dash means none on file that month. Trades use disclosure dates; contract dates follow the source record. Nearby events do not establish the cause of a price move.

Who's buying and selling · last 90 days

Congress

No Congress trades on MIAX disclosed in the last 90 days.

See every Congress trade on MIAX →

Company insiders

0 buys · 17 sells (18 filed lots) · $24.6M sold

  1. ▼ SELLDouglas M. Schafer Jr EVP and CIOMIAX Miami International Holdings, Inc.$1.3Mdisclosed Oct 6 · filed 4 days after the trade
  2. ▼ SELLShelly Brown EVP, Chief Strategy OfficerMIAX Miami International Holdings, Inc.$819Kdisclosed Sep 17 · filed 1 day after the trade
  3. ▼ SELLDouglas M. Schafer Jr EVP and CIOMIAX Miami International Holdings, Inc.$1.9Mdisclosed Sep 4 · filed 2 days after the trade
  4. ▼ SELLEdward Deitzel EVP, CRO, CCO MIAX ExchangesMIAX Miami International Holdings, Inc.$464Kdisclosed Sep 4 · filed 1 day after the trade
  5. ▼ SELLThomas P. Gallagher Chairman & CEOMIAX Miami International Holdings, Inc.$2Mdisclosed Sep 4 · filed 1 day after the trade
  6. ▼ SELLBarbara J. Comly EVP, GC & Corporate SecretaryMIAX Miami International Holdings, Inc.$1.8Mdisclosed Sep 4 · filed 2 days after the trade
  7. ▼ SELLJudson Gray Teekell DirectorMIAX Miami International Holdings, Inc.$123Kdisclosed Sep 4 · filed 2 days after the trade
  8. ▼ SELLJudson Gray Teekell DirectorMIAX Miami International Holdings, Inc.$231Kdisclosed Sep 4 · filed 2 days after the trade
  9. ▼ SELLThomas P. Gallagher Chairman & CEOMIAX Miami International Holdings, Inc.$6.2Mdisclosed Aug 20 · filed 1 day after the trade
  10. ▼ SELLLance Emmons EVP and CFOMIAX Miami International Holdings, Inc.$1.5Mdisclosed Aug 19 · filed 2 days after the trade
See every insider trade on MIAX →

Big holders (Schedule 13D / 13G): 2 filings in the last 90 days · newest: T. Rowe Price Investment Management, Inc. (13G), Aug 14, 2026 ↗

Filings & events

Company filings (8-K) 25

Events the company must report to the SEC within days — results, deals, departures, restatements.

What it files 8-Ks about

  • Other events · item 8.015
  • Directors or officers joined, left or got new pay · item 5.025
  • Sold shares privately · item 3.025
  • Quarterly or yearly results · item 2.023
  • Shareholder vote results · item 5.071
  • Ended a major agreement · item 1.021

Filing red flags 1

Warning signs in the company's own SEC filings — going-concern doubts, control weaknesses, staff comment letters, late filings, restatements, Wells notices, clinical holds, dividend cuts.

Planned insider sales (Form 144) 32

Notices insiders file before they sell certain shares, such as ones they got straight from the company.

10 in the last 90 days · 32 notices on file

The notices on file don't give the sale's size; each sale shows up under company insiders once it is reported.

5% owners (13D / 13G) 9

Investors who reported owning 5% or more — 13D for owners who may push for changes, 13G for owners who just hold.

Push for changes, or just hold?

  • 13D, may push for changes: 7 filings
  • 13G, just holds: 2 filings

Filed most: Horizon Kinetics Asset Management LLC (5) · Gallagher Thomas P. (2) · T. Rowe Price Investment Management, Inc. (1) · BlackRock, Inc. (1)

Biggest named funds (13F)

The largest MIAX holdings among the well-known funds whose quarterly 13F filings we read — opens here.

Every disclosed trade on MIAX

  1. ▼ SELLDouglas M. Schafer Jr EVP and CIOMIAX Miami International Holdings, Inc.$1.3Mdisclosed Oct 6 · filed 4 days after the trade
  2. ▼ SELLShelly Brown EVP, Chief Strategy OfficerMIAX Miami International Holdings, Inc.$819Kdisclosed Sep 17 · filed 1 day after the trade
  3. ▼ SELLDouglas M. Schafer Jr EVP and CIOMIAX Miami International Holdings, Inc.$1.9Mdisclosed Sep 4 · filed 2 days after the trade
  4. ▼ SELLEdward Deitzel EVP, CRO, CCO MIAX ExchangesMIAX Miami International Holdings, Inc.$464Kdisclosed Sep 4 · filed 1 day after the trade
  5. ▼ SELLThomas P. Gallagher Chairman & CEOMIAX Miami International Holdings, Inc.$2Mdisclosed Sep 4 · filed 1 day after the trade
  6. ▼ SELLBarbara J. Comly EVP, GC & Corporate SecretaryMIAX Miami International Holdings, Inc.$1.8Mdisclosed Sep 4 · filed 2 days after the trade
  7. ▼ SELLJudson Gray Teekell DirectorMIAX Miami International Holdings, Inc.$123Kdisclosed Sep 4 · filed 2 days after the trade
  8. ▼ SELLJudson Gray Teekell DirectorMIAX Miami International Holdings, Inc.$231Kdisclosed Sep 4 · filed 2 days after the trade
  9. ▼ SELLThomas P. Gallagher Chairman & CEOMIAX Miami International Holdings, Inc.$6.2Mdisclosed Aug 20 · filed 1 day after the trade
  10. ▼ SELLLance Emmons EVP and CFOMIAX Miami International Holdings, Inc.$1.5Mdisclosed Aug 19 · filed 2 days after the trade
  11. ▼ SELLCynthia Schwarzkopf DirectorMIAX Miami International Holdings, Inc.$214Kdisclosed Aug 19 · filed 2 days after the trade
  12. ▼ SELLBarbara J. Comly EVP, GC & Corporate SecretaryMIAX Miami International Holdings, Inc.$2Mdisclosed Aug 6 · filed 2 days after the trade
  13. ▼ SELLEdward Deitzel EVP, CRO, CCO MIAX ExchangesMIAX Miami International Holdings, Inc.$504Kdisclosed Aug 6 · filed 2 days after the trade
  14. ▼ SELLKurt M. Eckert DirectorMIAX Miami International Holdings, Inc.$48.7Kdisclosed Aug 6 · filed 2 days after the trade
  15. ▼ SELLHarish Jayabalan EVP, CISO and CROMIAX Miami International Holdings, Inc.$918Kdisclosed Aug 6 · filed 2 days after the trade
  16. ▼ SELLDouglas M. Schafer Jr EVP and CIOMIAX Miami International Holdings, Inc.$2.2Mdisclosed Aug 6 · filed 2 days after the trade
  17. ▼ SELLJudson Gray Teekell DirectorMIAX Miami International Holdings, Inc.$137Kdisclosed Aug 6 · filed 2 days after the trade
  18. ▼ SELLThomas P. Gallagher Chairman & CEOMIAX Miami International Holdings, Inc.$2.2Mdisclosed Aug 6 · filed 2 days after the trade
  19. ▼ SELLCynthia Schwarzkopf DirectorMIAX Miami International Holdings, Inc.$210Kdisclosed Jul 16 · filed 1 day after the trade
  20. ▼ SELLThomas P. Gallagher Chairman & CEOMIAX Miami International Holdings, Inc.$3Mdisclosed Jul 14 · filed 1 day after the trade
  21. ▼ SELLBarbara J. Comly EVP, GC & Corporate SecretaryMIAX Miami International Holdings, Inc.$1.2Mdisclosed Jul 14 · filed 1 day after the trade
  22. ▼ SELLBarbara J. Comly EVP, GC & Corporate SecretaryMIAX Miami International Holdings, Inc.$1.2Mdisclosed Jul 7 · filed 5 days after the trade · late
  23. ▼ SELLEdward Deitzel EVP, CRO, CCO MIAX ExchangesMIAX Miami International Holdings, Inc.$462Kdisclosed Jul 7 · filed 1 day after the trade
  24. ▼ SELLThomas P. Gallagher Chairman & CEOMIAX Miami International Holdings, Inc.$1.2Mdisclosed Jul 7 · filed the same day
  25. ▼ SELLDouglas M. Schafer Jr EVP and CIOMIAX Miami International Holdings, Inc.$2Mdisclosed Jul 7 · filed 5 days after the trade · late
See all 36 trades on MIAX →
People & votes

Which members of Congress traded MIAX, sponsored bills that touch it and voted on them — opens here.