Place it in its market
Seven layers of its region's market — rates, credit, stress, liquidity, regime, breadth and sectors — with historical precedents. Public example: Apple and ASML.
See how Context works →On the price, the facts of the public record■Insider buy□Insider sell◇Significant stake declared (13D)●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Oct 2, 2026Reported sale · Form 4Douglas M. Schafer JR, EVP and CIO · $1.3MOpen the filing ↗
- Oct 2, 2026Notice of sale · Form 144DOUGLAS M. SCHAFER JR. · Officer · $4.1MOpen the filing ↗
- Sep 16, 2026Reported sale · Form 4Shelly Brown, EVP, Chief Strategy Officer · $819.2KOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record26311 flagged findings
Reported transactions (Form 4)80since Jun 16, 2026 · and 40 other holdings
Corporate events (8-K)12since Aug 15, 2025
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
Miami International Holdings, Inc. (MIH), trading as MIAX, is an American company formed in 2007 that operates global financial exchanges and execution services.
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-08-07share offering or dilution eventfreshOpen filing ↗“…basis based on the number of shares of the Company’s common stock then issuable pursuant to the pre-funded warrant. In…”
+1 more passage from the same document
- “…In August 2025, the ERP participant exchanged an additional 575,071 shares of the Company’s voting common stock it purchased from…”
- 2026-08-07capital return (buybacks/dividends)freshOpen filing ↗“…2029 Senior Secured Term Loan. The right to put warrants terminated upon completion of the IPO in August 2025. (6) The change in…”
+1 more passage from the same document
- “…2029 Senior Secured Term Loan. The right to put warrants terminated upon completion of the IPO in August 2025. (7) The change in…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 263)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Oct 6, 26Form 4 ↗Insider transaction
- Oct 2, 26Form 144 ↗Notice of proposed sale
- Sep 16, 26Form 144 ↗Notice of proposed sale
- Sep 3, 26Form 144 ↗Notice of proposed sale
- Aug 19, 26Form 144 ↗Notice of proposed sale
- Aug 17, 26Form 144 ↗Notice of proposed sale
- Aug 14, 26SCHEDULE 13G ↗Passive stake · T. Rowe Price Investment Management, Inc. · 5.3% · event on Jun 30, 26
- Aug 7, 2610-Q ↗Quarterly report
263 filings on record, the oldest from May 27, 22.
Listing the 25 most recent filings of the 263 on record.
75
- Jun 22, 26Sold unregistered shares8-K 3.02 ↗
4 senior executive changes2026show all 4hide
- Jun 17, 26A senior executive left or was appointed8-K 5.02 ↗
- Apr 27, 26A senior executive left or was appointed8-K 5.02 ↗
- Apr 9, 26A senior executive left or was appointed8-K 5.02 ↗
- Mar 26, 26A senior executive left or was appointed8-K 5.02 ↗
4 sales of unregistered shares2025 – 2026show all 4hide
- Mar 2, 26Sold unregistered shares8-K 3.02 ↗
- Feb 20, 26Sold unregistered shares8-K 3.02 ↗
- Feb 12, 26Sold unregistered shares8-K 3.02 ↗
- Dec 15, 25Sold unregistered shares+1 more in the same filing8-K 3.02 ↗
- Oct 8, 25A senior executive left or was appointed8-K 5.02 ↗
- Aug 19, 25A material agreement was terminated8-K 1.02 ↗
- Aug 15, 25Sold unregistered shares+1 more in the same filing8-K 3.02 ↗
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13D: stake and stated purpose
Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.
- HORIZON KINETICS ASSET MANAGEMENT LLC7.8%May 19, 26SCHEDULE 13D/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 4 earlier filings
- Thomas P. Gallagher4.9%Aug 26, 25SCHEDULE 13D/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- T. Rowe Price Investment Management, Inc.5.3%Jun 30, 26SCHEDULE 13G ↗
- BlackRock, Inc.5.1%Jun 30, 26SCHEDULE 13G ↗
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Oct 2, DOUGLAS M. SCHAFER JR. filed notice of intent to sell up to $4.0M. That is about 0.12% of shares outstanding. It is filed under a scheduled plan (10b5-1), arranged in advance.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $1.3M on Oct 2, per their Form 4. That is 33% of the shares announced so far, and the window is still open.
View notice (Form 144) ↗+9 more recent notices · 9 with a later sale
- Oct 2, 26Sell$1.3MDouglas M. Schafer JREVP and CIO↗
- Sep 16, 26Sell$819KShelly BrownEVP, Chief Strategy Officer↗
- Sep 3, 26Sell$2.0MThomas P. GallagherChairman & CEO↗
- Sep 3, 26Sell$464KEdward DeitzelEVP, CRO, CCO MIAX Exchanges↗
- Sep 2, 26Sell$231KJudson Gray Teekell↗
- Sep 2, 26Sell$123KJudson Gray Teekell↗
- Sep 2, 26Sell$1.9MDouglas M. Schafer JREVP and CIO↗
- Sep 2, 26Sell$1.8MBarbara J. ComlyEVP, GC & Corporate Secretary↗
- Aug 19, 26Sell$6.2MThomas P. GallagherChairman & CEO↗
- Aug 17, 26Sell$1.5MLance EmmonsEVP and CFO↗
- Aug 17, 26Sell$214KCynthia Schwarzkopf↗
- Aug 4, 26Sell$137KJudson Gray Teekell↗
There are 6 more transactions in this stretch.
Stock compensation, tax and giftsshow the 22 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Oct 2, 26Compensation$480KDouglas M. Schafer JREVP and CIO↗
- Sep 25, 26Compensation$100KHarish JayabalanEVP, CISO and CRO↗
- Sep 11, 26Tax$693KShelly BrownEVP, Chief Strategy Officer↗
- Sep 3, 26Compensation$564KThomas P. GallagherChairman & CEO↗
- Sep 3, 26Compensation$200KThomas P. GallagherChairman & CEO↗
- Sep 3, 26Compensation$100KThomas P. GallagherChairman & CEO↗
- Sep 3, 26Compensation$200KThomas P. GallagherChairman & CEO↗
- Sep 3, 26Compensation$100KThomas P. GallagherChairman & CEO↗
- Sep 3, 26Compensation$132KEdward DeitzelEVP, CRO, CCO MIAX Exchanges↗
- Sep 2, 26Compensation$520KDouglas M. Schafer JREVP and CIO↗
- Sep 2, 26Compensation$56KDouglas M. Schafer JREVP and CIO↗
- Sep 2, 26Compensation$533KBarbara J. ComlyEVP, GC & Corporate Secretary↗
- Aug 18, 26Tax$6.4MThomas P. GallagherChairman & CEO↗
- Aug 18, 26Tax$1.8MBarbara J. ComlyEVP, GC & Corporate Secretary↗
- Aug 17, 26Compensation$60KCynthia Schwarzkopf↗
- Aug 4, 26Compensation$576KDouglas M. Schafer JREVP and CIO↗
- Aug 4, 26Compensation$580KThomas P. GallagherChairman & CEO↗
- Aug 4, 26Compensation$170KHarish JayabalanEVP, CISO and CRO↗
- Aug 4, 26Compensation$89KHarish JayabalanEVP, CISO and CRO↗
- Aug 4, 26Compensation$132KEdward DeitzelEVP, CRO, CCO MIAX Exchanges↗
- Aug 4, 26Compensation$13KKurt M. Eckert↗
- Aug 4, 26Compensation$533KBarbara J. ComlyEVP, GC & Corporate Secretary↗
The full record holds 266 transactions and goes back to Aug 13, 25.
Its sector and its market
Miami International Holdings, Inc. among Financials companies
The profile shows what is on record. Context and Radar place the company among those of its sector and region.
Browse its neighbours
Other Financials companies
With an account you also get
- The four engines — growth, trend, risk and context — each with its word and its score.
- The risk band and the sector phase.
- The company's fundamentals and accounts.
- Watchlist: your list of companies, with the «since you follow it» figure.
The research continues
The profile tells the story. The market sets the scene.
From Miami International Holdings, Inc., the path continues in the other areas. Each one is shown with its own example, named in its step.
See what deserves a closer look
Every morning Radar screens the covered companies through a lens and explains why each candidate made the list. Public example: the lists from Aug 11, 2026.
See how Radar works →Keep the why
Follow Miami International Holdings, Inc. in the Watchlist and review what changed since you added it: context, notices and filings. Written theses are coming soon. Public example: Apple.
See an example review →
Coverage
What sits behind this page.
Where each figure comes from and how far it reaches.
- Prices
- End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
- Series quality
- 250 clean closes in the period.
- SEC records
- 263 documents on file, from May 27, 2022 to Oct 6, 2026.
- Company description
- Wikipedia, read on Sep 3, 2026.
- This page
- Generated on Oct 19, 2026; refreshed through the day.
Start at your own pace
Explore first. Go deeper with access.
Every company's public profile is open. The full reading — context, Radar, watchlist — is inside, in an invitation-only beta.
Compare plans →- No account
This profile for every company we cover: closing prices with the record's facts on the curve, the SEC file in plain language, insider trades included, and links to its sector and exchange.
- Pro
What matters today, with its reason, is free with an account. Pro adds, in the profile, each company's notices and their explanation and the analysis of its insiders; in Radar, all the lenses, which notice each candidate carries, filters by notice type and «no dilution», and the cycle cohort filter; and in Watchlist, more companies and notice changes with their reason.
- Pro+
Adds the Lab: test a hypothesis on comparable cohorts before reusing it; and bring your lenses to Radar.
Are the prices real time?
No. It is one close per session, from the provider and with the date shown on the profile; it does not update during the trading day.
Which SEC documents appear here?
Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
Why does a European company show no SEC records?
It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.
Before forming a view on a company,
read what is on record.
One close per session. The record in plain language. Its sector and its market one link away. Your judgment when deciding.