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MIAX · Miami International Holdings, Inc.
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MIAX Miami International (MIAX) Insider Trading, Ownership & Congress Trades

Financial Services · Security brokers, dealers & flotation companies · CIK 0001438472
Quote by TradingView
Congress · 1Form 144 · 10
Insider buyers, 180 days
0
Funds added, last quarter
0
13F, latest reported quarter
Conversions, 180 days
57
Codes C/M, not in net · $14.6M priced

What the filings say about MIAX

Insiders, 180 days
-$58.2M net sold
10 sellers · 21% of sales under a 10b5-1 plan
Congress, 1 year
1 bought · 0 sold
Latest: purchase, 2026-03-20
Planned sales (Form 144), 90 days
$34.5M
10 notices

Miami International insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

Over the last 180 days, MIAMI INTERNATIONAL HOLDINGS, INC. insiders sold a net $58.2M of stock across 89 Form 4 purchases and sales, with no insider buying. Source: SEC Form 4 filings, as of 2026-10-28.

Insider
Filed
Shares
Value
Since filing
Schafer Douglas M. JR
EVP and CIO
SELL
2026-10-26 SECtraded 2026-10-22
8,000
$280.5K
n/a
Context
  • 7 earlier Form 4 trades (code P or S) here by this insider (7 sales), the last on Oct 2, 2026.
  • The trade is 2.1% of the 387,414 shares held after it.
  • 1 other insider sold within 30 days.
Insider activity: EVP and CIO Schafer Douglas M. JR sold about $280.5K of MIAX under a 10b5-1 plan on Oct 22, 2026; 1 other insider sold within 30 days.
Comly Barbara J.
EVP, GC & Corporate Secretary
SELL
2026-10-26 SECtraded 2026-10-22
12,306
$431.2K
n/a
Context
  • 7 earlier Form 4 trades (code P or S) here by this insider (7 sales), the last on Sep 2, 2026.
  • The trade is 1.5% of the 839,564 shares held after it.
  • 1 other insider sold within 30 days.
Insider activity: EVP, GC & Corporate Secretary Comly Barbara J. sold about $431.2K of MIAX under a 10b5-1 plan on Oct 22, 2026; 1 other insider sold within 30 days.
Schafer Douglas M. JR
EVP and CIO
SELL
2026-10-06 SECtraded 2026-10-02
40,000
$1.3M
+9.9%
Context
  • 6 earlier Form 4 trades (code P or S) here by this insider (6 sales), the last on Sep 2, 2026.
  • The trade is 10.3% of the 387,414 shares held after it.
  • 5 other insiders sold within 30 days.
Insider activity: EVP and CIO Schafer Douglas M. JR sold about $1.3M of MIAX under a 10b5-1 plan on Oct 2, 2026; 5 other insiders sold within 30 days.
Brown Shelly
EVP, Chief Strategy Officer
SELL
2026-09-17 SECtraded 2026-09-16
21,217
$819.2K
-14.5%
Context
  • 8 earlier Form 4 trades (code P or S) here by this insider (8 sales), the last on Jul 6, 2026.
  • The trade is 6.7% of the 316,490 shares held after it.
  • 7 other insiders sold within 30 days.
Insider activity: EVP, Chief Strategy Officer Brown Shelly sold about $819.2K of MIAX under a 10b5-1 plan on Sep 16, 2026; 7 other insiders sold within 30 days.
Deitzel Edward
EVP, CRO, CCO MIAX Exchanges
SELL
2026-09-04 SECtraded 2026-09-03
11,000
$464.3K
-23.7%
Context
  • 8 earlier Form 4 trades (code P or S) here by this insider (1 buy, 7 sales), the last on Aug 4, 2026.
  • The trade is 9.2% of the 119,601 shares held after it.
  • 9 other insiders sold within 30 days.
Insider activity: EVP, CRO, CCO MIAX Exchanges Deitzel Edward sold about $464.3K of MIAX under a 10b5-1 plan on Sep 3, 2026; 9 other insiders sold within 30 days.
89 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
See all insider buying · insider selling
Showing the latest few. to see 84 more transactions and use the screener and CSV export. We store only your email; there is no password.
Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net -$58.2M over 180 days
-$25.3M over 90 days
below 95% of Financial Services
Congress
1 member bought in the last year
the lowest in Financial Services
Funds
under five funds report holding it
Revenue
+19.6% year over year
more than 61% of Financial Services
Margin
-5.1% net margin
below 60% of Financial Services
Buybacks
$17.0M repurchased, FY to 2026-06-30
below 62% of Financial Services
Short interest
9.5% of the float short (float per yahoo 2026-10-26) · 4.6 days to cover · settled 2026-09-30
more than 86% of Financial Services
What changed in the last 30 days
Oct 26EVP and CIO Schafer Douglas M. JR sold $1.6M under a 10b5-1 plan (2 trades, Oct 2 to Oct 22)
Why it matters
A 10b5-1 plan schedules trades months ahead, so this says little about what the insider thinks today.
Oct 26EVP, GC & Corporate Secretary Comly Barbara J. sold $431.2K under a 10b5-1 plan (Oct 22)
Why it matters
A 10b5-1 plan schedules trades months ahead, so this says little about what the insider thinks today.
Oct 2Officer DOUGLAS M. SCHAFER JR. filed to sell $4.0M by Oct 2 (Form 144)
Why it matters
A Form 144 is a notice of intent to sell; the sale may not happen, and it says nothing about the price.

Watch MIAX

A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.

The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
-22.0%12M
-30%-9%+12%+34%2025-102025-122026-022026-042026-062026-082026-10 2026-08-19 · Gallagher Thomas P. sold $6.2M2026-03-02 · HORIZON KINETICS ASSET MANAGEMENT LLC sold $5.0M2026-04-15 · Gallagher Thomas P. sold $4.5M2026-04-15 · Gallagher Thomas P. sold $3.0M2026-07-13 · Gallagher Thomas P. sold $3.0M2026-06-02 · Gallagher Thomas P. sold $3.0M2026-05-04 · Gallagher Thomas P. sold $2.6M2026-05-04 · Schafer Douglas M. JR sold $2.3M2026-08-04 · Gallagher Thomas P. sold $2.2M2026-08-04 · Schafer Douglas M. JR sold $2.2M2026-03-02 · STAHL MURRAY sold $2.2M2026-04-15 · Gallagher Thomas P. sold $2.2M2026-06-02 · Schafer Douglas M. JR sold $2.1M2026-08-04 · Comly Barbara J. sold $2.0M2026-09-03 · Gallagher Thomas P. sold $2.0M2026-07-02 · Schafer Douglas M. JR sold $2.0M2026-05-15 · Emmons Lance sold $2.0M2026-09-02 · Schafer Douglas M. JR sold $1.9M2026-03-17 · Schafer Douglas M. JR sold $1.9M2026-09-02 · Comly Barbara J. sold $1.8M2026-07-06 · Gallagher Thomas P. sold $1.8M2026-08-17 · Emmons Lance sold $1.5M2026-03-19 · Eckert Kurt M. sold $1.5M2026-10-02 · Schafer Douglas M. JR sold $1.3M2026-05-04 · Comly Barbara J. sold $1.3M2026-04-15 · Comly Barbara J. sold $1.3M2026-06-02 · Comly Barbara J. sold $1.2M2026-07-07 · Gallagher Thomas P. sold $1.2M2026-07-13 · Comly Barbara J. sold $1.2M2026-07-02 · Comly Barbara J. sold $1.2M2026-03-23 · Brown Shelly sold $1.0M2026-08-04 · Jayabalan Harish sold $918.0K2026-07-06 · Jayabalan Harish sold $842.4K2026-09-16 · Brown Shelly sold $819.2K2026-06-11 · Schwarzkopf Cynthia sold $813.7K2026-05-04 · Brown Shelly sold $756.5K2026-05-05 · Gallagher Thomas P. sold $755.7K2026-04-08 · Brown Shelly sold $691.5K2026-07-06 · Brown Shelly sold $674.1K2026-06-02 · Brown Shelly sold $673.9K2026-05-04 · Deitzel Edward sold $520.1K2026-08-04 · Deitzel Edward sold $503.6K2026-10-02 · DOUGLAS M. SCHAFER JR. filed to sell $4.0M2026-09-16 · SHELLY BROWN filed to sell $838.3K2026-09-03 · GALLAGHER INVESTMENTS LLC filed to sell $5.7M2026-08-19 · GALLAGHER INVESTMENTS LLC filed to sell $6.3M2026-08-17 · Lance Emmons filed to sell $1.5M2026-08-04 · BARBARA J. COMLY filed to sell $8.5M2026-08-04 · EDWARD DEITZEL filed to sell $2.1M2026-08-04 · GALLAGHER INVESTMENTS LLC filed to sell $2.3M2026-08-04 · HARISH JAYABALAN filed to sell $3.0M2026-08-04 · J. GRAY TEEKELL filed to sell $281.0K2026-07-15 · CYNTHIA SCHWARZKOPF filed to sell $619.5K2026-07-06 · SHELLY BROWN filed to sell $653.4K2026-07-06 · HARISH JAYABALAN filed to sell $816.8K2026-07-02 · KURT M. ECKERT filed to sell $246.5K2026-07-02 · DOUGLAS M. SCHAFER JR. filed to sell $5.6M
Insider sellForm 144 (planned sale)
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns MIAX: institutional holders (13F)

13F holdings, latest reported quarter
SEC 13F
No reported 13F holders

No fund above the reporting threshold listed this stock last quarter. That is a fact, not missing data.

Congress trades in MIAX

STOCK Act disclosures, US House only, filed up to 45 days after the trade
Gilbert Cisneros
Bought 2026-03-20 · disclosed 18 days later
$15,001 - $50,000
All stocks members of Congress are buying · Every member's trades

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

MIAX planned insider sales (Form 144)

Notice of intent to sell, filed before any sale
DOUGLAS M. SCHAFER JR.
Filed 2026-10-02
$4.0M
SHELLY BROWN
Filed 2026-09-16
$838.3K
GALLAGHER INVESTMENTS LLC
Filed 2026-09-03
$5.7M
GALLAGHER INVESTMENTS LLC
Filed 2026-08-19
$6.3M
Lance Emmons
Filed 2026-08-17
$1.5M
Executive pay vs shareholder return · Thomas P. Gallagher
CEO pay, headline and as actually paid, against the company's return and its chosen peers' (DEF 14A).
FY
CEO total
Actually paid
Other execs, avg
TSR
Peer TSR
2025
$21.2M
$35.1M
$4.9M
+44%
-3%
Tagged by the company under SEC Item 402(v). Returns are cumulative from the start of the disclosure period. Green where the company beat its own peer group.
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
Insiders have filed to sell, before selling.
The record shows a net $58.2M sold by insiders over 180 days, 1 House member(s) bought in 12 months, disclosed weeks after the trade, $34.5M in planned Form 144 sales. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
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Sector by SEC SIC code
MSTRCOINMORNUPSTIBKRCACCARESHOODRKTSCHWGSDAVE

MIAX financials

Revenue growth
+19.6%
XBRL, annual
Net margin
-5.1%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$1.5B
four quarters, 2025-07-01 to 2026-06-30
Net margin, TTM
+9.7%
net income over revenue, 2025-07-01 to 2026-06-30
Free cash flow, TTM
$251.5M
operating cash flow minus capex, 2025-07-01 to 2026-06-30
Debt to equity
0.00x
long-term 2026-06-30 plus current 2026-06-30; equity 2026-06-30
Cash flow to debt
188.46x
TTM operating cash flow over long-term 2026-06-30 plus current 2026-06-30
Return on equity
+18.1%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets
+8.9%
TTM net income over ending balance 2026-06-30
Return on invested capital
n/a
effective tax rate -150%, not meaningful
Return on capital employed
+9.9%
operating income (EBIT proxy) over ending balance 2026-06-30 minus current liabilities
P/E, trailing
32.83x
close 2026-10-26 over four quarters of diluted EPS, 2025-07-01 to 2026-06-30
Enterprise value
$2.6B
market value at close 2026-10-26 on 2026-07-31 shares, plus long-term 2026-06-30 plus current 2026-06-30, minus cash 2026-06-30
FCF yield
+7.6%
TTM free cash flow over market value at close 2026-10-26
PEG, trailing
n/a
prior-year trailing EPS was a loss, growth undefined
Price as of 2026-10-26. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2025-122024-122023-12
Revenue$1.4B$1.1B$1.0B
Gross profit$430.5M$275.6M$232.5M
Operating income$92.0M-$2.8M-$2.9M
Net income-$70.0M$102.1M-$20.9M
EPS (diluted)-1.001.39-0.37
Operating cash flow$167.8M$111.4M-$49.2M
Cash$433.6M$150.3M$59.3M
Long-term debt$0$32.3Mn/a
Buybacks$21.8M$12.4M$3.3M
SEC XBRL, fiscal years, as known on 2026-10-28

MIAX Stock Sonar score 6/7 axes

Find similar shapesCompare

MIAX ranks highest on financial health (94th percentile) and profitability (78th), and lowest on insider conviction (2nd), among Financial Services peers.

ProfitHealthGrowthInsidersInstitutionsRisk
Profitability
78
Inputs
  • Return on equity+18.1% · 71 pct, sector of 205
  • Return on assets+8.9% · 79 pct, sector of 266
  • Return on invested capitaleffective tax rate -150%, not meaningful
  • Return on capital employed+9.9% · 83 pct, sector of 88
Financial health
94
Inputs
  • Debt to equity0.00x · 88 pct, sector of 181
  • Cash flow to debt188.46x · 100 pct, sector of 141
Growth
61
Inputs
  • Revenue growth, YoY+19.6% · 61 pct, sector of 245
  • Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Insider conviction
2
Inputs
  • Net Form 4 buying (codes P and S), 180d-$42.6M · 5 pct, sector of 161
  • Insider buyers, 180d0 · 0 pct, sector of 165
Institutional and government
67
Inputs
  • Funds adding, latest quarterfewer than five funds report holding it
  • Congress net buyers, 365d1 · 67 pct, sector of 31
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
20
Inputs
  • Short interest, % of float+9.5% · 20 pct, sector of 390
  • Recalls per $1B revenue, 3ynot measured for this sector, almost no peer has an event
  • EPA cases per $1B revenue, 5ynot measured for this sector, almost no peer has an event
  • New text in Risk Factors, latest 10-Kneeds two 10-Ks with a Risk Factors section (not 20-F filers or stubs)
1 not measured: US patents
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

6 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

MIAX filings, in plain words

Are Miami International insiders buying or selling MIAX?

In the 180 days to 2026-10-28, Miami International insiders were net sellers, a net $58.2M across purchases and sales reported on Form 4, by 10 sellers.

Have members of Congress traded MIAX?

Yes. In the year to 2026-10-28, 1 House member disclosed buying MIAX and 0 House members disclosed selling it; the latest on record is a purchase by Gilbert Cisneros dated 2026-03-20.

Are there planned insider sales of MIAX?

Yes. 10 Form 144 notices of planned insider sales were filed in the 90 days to 2026-10-28, covering $34.5M of stock; the latest, by DOUGLAS M. SCHAFER JR., was filed 2026-10-02.

Read the full summary

In the 180 days to 2026-10-28, Miami International insiders were net sellers of MIAX, a net $58.2M across purchases and sales reported on Form 4 by 10 sellers. 21% of the 52 insider sales were made under a Rule 10b5-1 plan; the rest were not flagged as planned. In the year to 2026-10-28, 1 member of Congress disclosed buying MIAX and 0 members disclosed selling it; the latest on record is a purchase by Gilbert Cisneros dated 2026-03-20. Insiders filed 10 Form 144 notices of intent to sell in the 90 days to 2026-10-28, covering $34.5M of stock. Each figure is counted from SEC and House filings as of 2026-10-28, dated the day the filing was made public.

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