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NYSE · CIK 0001438472

MIAX MIAMI INTERNATIONAL HOLDINGS, INC.

Insider trading from SEC Form 4. Last filing 6 d ago. Close $30.71 on Oct 9, 2026, +2% from the 52-week low and -46% from the high.

Last 90 days

Net insider value
-$8.7M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
7
$8.7M by 6 insiders
Insiders on file
21
with a Form 4 at this company

Price and insider trades, last year

MIAXOct 9, 2026 · close 30.71

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

Open-market buys and sells at MIAMI INTERNATIONAL HOLDINGS, INC., scored.

ScoreInsiderValueHoldingsPrice contextFiled
5WeakDouglas M. Schafer JR
EVP and CIO
sell
$1.3M
40,000 shares
-9%0% from low-42% from high
32WeakShelly Brown
EVP, Chief Strategy Officer
sell
$819k
21,217 shares
-6%-
20WeakBarbara J. Comly
EVP, GC & Corporate Secretary
sell
$1.8M
44,445 shares
-5%-
12WeakEdward Deitzel
EVP, CRO, CCO MIAX Exchanges
sell
$464k
11,000 shares
-8%-
30WeakThomas P. Gallagher
Chairman & CEO
sell
$2.0M
47,000 shares
-3%-
25WeakJudson Gray Teekell
director
sell
$353k
8,545 shares
-10%-
25WeakDouglas M. Schafer JR
EVP and CIO
sell
$1.9M
48,000 shares
-11%-
39WeakMurray Stahl
director
buy
$100k
2,439 shares
+0%+39% from low-16% from high
25WeakMurray Stahl
director
buy
$84
2 shares
+0%+37% from low0% from high
53ModerateMurray Stahl
director
buy
$1.2M
34,470 shares
+1%+15% from low0% from high
25WeakMurray Stahl
director
buy
$167
4 shares
+0%+34% from low-2% from high
55ModerateLance Emmons
EVP and CFO
buy
$126
4 shares
-0% from low0% from high
25WeakEdward Deitzel
EVP, CRO, CCO MIAX Exchanges
buy
$2,300
100 shares
+0%-
62NotableThomas P. Gallagher
Chairman & CEO
buy
$276k
12,000 shares
--
47ModerateHarish Jayabalan
EVP, CISO and CRO
buy
$58k
2,500 shares
+63%-
38WeakKenneth W. Lozier
director
buy
$23k
1,000 shares
--
50ModerateMark I. Massad
director
buy
$184k
8,000 shares
--
50ModerateJohn Smollen
EVP Traded Products & Relation
buy
$115k
5,000 shares
+225%-
45ModerateJamil Nazarali
director
buy
$58k
2,500 shares
--
38WeakPaul Stahlin
director
buy
$23k
1,000 shares
--
49ModerateLisa Moore
director
buy
$127k
5,500 shares
--

Congressional trades

1 trade in MIAX disclosed by members of Congress under the STOCK Act. All congressional trades.

MemberTradeAssetReported rangeTrade / filing dateSource
PurchaseMIAX
Miami International Holdings, Inc. Common Stock
$15k to $50kMar 20 / Apr 7
18 days after the trade
Clerk

Transactions

The last 100 rows filed, every code.

DateInsiderTransactionSharesPriceValueHoldings afterFiled
Oct 2, 2026Douglas M. Schafer JR
EVP and CIO
MOption exercise
Common Stock10b5-1
+40,000$12.00$480k427,4146 d ago
Oct 2, 2026Douglas M. Schafer JR
EVP and CIO
SOpen-market sale
Common Stock10b5-1
-40,000$33.34$1.3M387,4146 d ago
Oct 2, 2026Douglas M. Schafer JR
EVP and CIO
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative10b5-1
-40,000$0.00$0155,3346 d ago
Sep 25, 2026Harish Jayabalan
EVP, CISO and CRO
MOption exercise
Common Stock
+8,333$12.00$100k86,39813 d ago
Sep 25, 2026Harish Jayabalan
EVP, CISO and CRO
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-8,333$0.00$08,33313 d ago
Sep 16, 2026Shelly Brown
EVP, Chief Strategy Officer
SOpen-market sale
Common Stock10b5-1
-21,217$38.61$819k316,49025 d ago
Sep 11, 2026Shelly Brown
EVP, Chief Strategy Officer
FTax withholding
Common Stock
-16,283$42.54$693k337,70731 d ago
Sep 3, 2026Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
MOption exercise
Common Stock10b5-1
+11,000$12.00$132k130,60138 d ago
Sep 2, 2026Judson Gray Teekell
director
SOpen-market sale
Common Stockindirect: By estate of Byrum W. Teekell10b5-1
-5,545$41.58$231k81,00038 d ago
Sep 2, 2026Barbara J. Comly
EVP, GC & Corporate Secretary
MOption exercise
Common Stock10b5-1
+44,445$12.00$533k884,00938 d ago
Sep 2, 2026Douglas M. Schafer JR
EVP and CIO
MOption exercise
Common Stock10b5-1
+43,334$12.00$520k430,74838 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Common Stockindirect: By Gallagher Investments, LLC10b5-1
+47,000$12.00$564k1,470,27538 d ago
Sep 3, 2026Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
SOpen-market sale
Common Stock10b5-1
-11,000$42.21$464k119,60138 d ago
Sep 2, 2026Douglas M. Schafer JR
EVP and CIO
MOption exercise
Common Stock10b5-1
+4,666$12.00$56k435,41438 d ago
Sep 2, 2026Barbara J. Comly
EVP, GC & Corporate Secretary
SOpen-market sale
Common Stock10b5-1
-44,445$40.49$1.8M839,56438 d ago
Sep 2, 2026Judson Gray Teekell
director
SOpen-market sale
Common Stock10b5-1
-3,000$40.89$123k69,25138 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
SOpen-market sale
Common Stockindirect: By Gallagher Investments, LLC10b5-1
-47,000$42.43$2.0M1,423,27538 d ago
Sep 2, 2026Barbara J. Comly
EVP, GC & Corporate Secretary
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative10b5-1
-44,445$0.00$044,44438 d ago
Sep 3, 2026Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative10b5-1
-11,000$0.00$066,00038 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Common Stock10b5-1
+16,666$12.00$200k760,60538 d ago
Sep 2, 2026Douglas M. Schafer JR
EVP and CIO
SOpen-market sale
Common Stock10b5-1
-48,000$40.48$1.9M387,41438 d ago
Sep 2, 2026Douglas M. Schafer JR
EVP and CIO
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative10b5-1
-43,334$0.00$0038 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Common Stock10b5-1
+8,333$12.00$100k768,93838 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Common Stock10b5-1
+13,140$15.22$200k782,07838 d ago
Sep 2, 2026Douglas M. Schafer JR
EVP and CIO
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative10b5-1
-4,666$0.00$0195,33438 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Common Stock10b5-1
+4,464$22.40$100k786,54238 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Nonqualified Stock Option (Right to Buy)derivativeindirect: By Gallagher Investments, LLC10b5-1
-47,000$0.00$0188,00038 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Incentive Stock Option (Right to Buy)derivative10b5-1
-16,666$0.00$0038 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Incentive Stock Option (Right to Buy)derivative10b5-1
-8,333$0.00$0038 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Incentive Stock Option (Right to Buy)derivative10b5-1
-13,140$0.00$0038 d ago
Sep 3, 2026Thomas P. Gallagher
Chairman & CEO
MOption exercise
Incentive Stock Option (Right to Buy)derivative10b5-1
-4,464$0.00$08,92838 d ago
Dec 23, 2025Thomas P. Gallagher
Chairman & CEO
GGift
Common Stock
-2,000--585,963Dec 29, 2025
Dec 16, 2025Shelly Brown
EVP, Chief Strategy Officer
MOption exercise
Common Stock
+16,666$12.00$200k328,365Dec 17, 2025
Dec 16, 2025Lance Emmons
EVP and CFO
MOption exercise
Common Stock
+22,221$13.50$300k116,377Dec 17, 2025
Dec 16, 2025Shelly Brown
EVP, Chief Strategy Officer
MOption exercise
Common Stock
+8,333$12.00$100k336,698Dec 17, 2025
Dec 16, 2025Lance Emmons
EVP and CFO
MOption exercise
Common Stock
+6,195$16.14$100k122,572Dec 17, 2025
Dec 16, 2025Shelly Brown
EVP, Chief Strategy Officer
MOption exercise
Common Stock
+8,333$12.00$100k345,031Dec 17, 2025
Dec 16, 2025Lance Emmons
EVP and CFO
MOption exercise
Common Stock
+5,040$19.84$100k127,612Dec 17, 2025
Dec 16, 2025Lance Emmons
EVP and CFO
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-22,221$0.00$00Dec 17, 2025
Dec 16, 2025Shelly Brown
EVP, Chief Strategy Officer
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-16,666$0.00$00Dec 17, 2025
Dec 16, 2025Lance Emmons
EVP and CFO
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-6,195$0.00$00Dec 17, 2025
Dec 16, 2025Shelly Brown
EVP, Chief Strategy Officer
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-8,333$0.00$00Dec 17, 2025
Dec 16, 2025Lance Emmons
EVP and CFO
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-5,040$0.00$05,040Dec 17, 2025
Dec 16, 2025Shelly Brown
EVP, Chief Strategy Officer
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-8,333$0.00$00Dec 17, 2025
Dec 12, 2025Murray Stahl
director
POpen-market purchase
Common Stockindirect: Horizon Kinetics Asset Management LLC
+2,439$41.00$100k4,560,364Dec 15, 2025
Oct 3, 2025Murray Stahl
director
POpen-market purchase
Common Stockindirect: Horizon Kinetics Asset Management LLC
+2$41.97$844,557,925Oct 6, 2025
Aug 28, 2025Murray Stahl
director
POpen-market purchase
Common Stockindirect: Horizon Kinetics Asset Management LLC
+34,470$36.10$1.2M4,557,919Sep 30, 2025
Sep 26, 2025Murray Stahl
director
POpen-market purchase
Common Stockindirect: Horizon Kinetics Asset Management LLC
+4$41.76$1674,557,923Sep 30, 2025
Sep 11, 2025John Smollen
EVP Traded Products & Relation
MOption exercise
Common Stock
+125,001$12.00$1.5M193,174Sep 15, 2025
Sep 11, 2025John Smollen
EVP Traded Products & Relation
FTax withholding
Common Stock
-52,054$37.39$1.9M141,120Sep 15, 2025
Sep 11, 2025John Smollen
EVP Traded Products & Relation
MOption exercise
Common Stock
+24,999$12.00$300k166,119Sep 15, 2025
Sep 11, 2025John Smollen
EVP Traded Products & Relation
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative
-125,001$0.00$00Sep 15, 2025
Sep 11, 2025John Smollen
EVP Traded Products & Relation
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-24,999$0.00$00Sep 15, 2025
Sep 10, 2025Shelly Brown
EVP, Strat. Planning & BD
FTax withholding
Common Stock
-16,283$36.81$599k311,699Sep 11, 2025
Sep 9, 2025Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
MOption exercise
Common Stock
+62,500$12.00$750k144,387Sep 11, 2025
Sep 9, 2025Harish Jayabalan
EVP, CISO and CRO
MOption exercise
Common Stock
+21,999$12.00$264k72,384Sep 11, 2025
Sep 9, 2025Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
FTax withholding
Common Stock
-38,090$37.30$1.4M106,297Sep 11, 2025
Sep 9, 2025Harish Jayabalan
EVP, CISO and CRO
MOption exercise
Common Stock
+3,001$12.00$36k75,385Sep 11, 2025
Sep 11, 2025Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
MOption exercise
Common Stock
+16,666$12.00$200k122,963Sep 11, 2025
Sep 9, 2025Harish Jayabalan
EVP, CISO and CRO
FTax withholding
Common Stock
-1,980$37.30$74k73,405Sep 11, 2025
Sep 9, 2025Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative
-62,500$0.00$00Sep 11, 2025
Sep 9, 2025Harish Jayabalan
EVP, CISO and CRO
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-21,999$0.00$00Sep 11, 2025
Sep 10, 2025Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
MOption exercise
Incentive Stock Option (Right to Buy)derivative
-16,666$0.00$00Sep 11, 2025
Sep 9, 2025Harish Jayabalan
EVP, CISO and CRO
MOption exercise
Nonqualified Stock Option (Right to Buy)derivative
-3,001$0.00$00Sep 11, 2025
Aug 26, 2025Shelly Brown
EVP, Strat. Planning & BD
FTax withholding
Common Stock
-11,047$33.90$374k327,982Aug 28, 2025
Aug 26, 2025Thomas P. Gallagher
Chairman & CEO
FTax withholding
Common Stockindirect: By Gallagher Investments, LLC
-192,220$33.90$6.5M1,848,274Aug 28, 2025
Aug 15, 2025Talal Jassim Al-Bahar
director
CConversion
Common Stockindirect: By Arzan AM Limited
+238,462--3,617,296Aug 19, 2025
Aug 15, 2025David A Brown
director
MOption exercise
Stock Option (Right to Buy)derivative
-18,750$0.00$00Aug 19, 2025
Aug 15, 2025John Beckelman
director
MOption exercise
Stock Option (Right to Buy)derivative
-8,667$0.00$00Aug 19, 2025
Aug 15, 2025Shelly Brown
EVP, Strat. Planning & BD
CConversion
Common Stock
+500--339,029Aug 19, 2025
Aug 15, 2025Cynthia Schwarzkopf
director
CConversion
Common Stock
+36,250--81,308Aug 19, 2025
Aug 15, 2025Kurt M. Eckert
director
CConversion
Common Stock
+46,875--167,375Aug 19, 2025
Aug 15, 2025Douglas M. Schafer JR
EVP and CIO
CConversion
Common Stock
+500--537,796Aug 19, 2025
Aug 15, 2025Thomas P. Gallagher
Chairman & CEO
CConversion
Common Stockindirect: By Gallagher Investments, LLC
+500--2,040,494Aug 19, 2025
Aug 15, 2025John Smollen
EVP Traded Products & Relation
CConversion
Common Stock
+73,173--68,173Aug 19, 2025
Aug 15, 2025Judson Gray Teekell
director
CConversion
Common Stock
+30,000--62,338Aug 19, 2025
Aug 15, 2025Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
CConversion
Common Stock
+500--81,887Aug 19, 2025
Aug 15, 2025Paul Stahlin
director
CConversion
Common Stock
+10,000--25,083Aug 19, 2025
Aug 15, 2025Mark F. Raymond
director
CConversion
Common Stock
+17,500--43,827Aug 19, 2025
Aug 15, 2025Harish Jayabalan
EVP, CISO and CRO
CConversion
Common Stock
+500--50,385Aug 19, 2025
Aug 15, 2025Barbara J. Comly
EVP, GC & Corporate Secretary
CConversion
Common Stock
+100,500--811,960Aug 19, 2025
Aug 15, 2025Paul Stahlin
director
CConversion
Common Stock
+14,083--25,083Aug 19, 2025
Aug 15, 2025Talal Jassim Al-Bahar
director
CConversion
Nonvoting Common Stockderivativeindirect: By Arzan AM Limited
-238,462$0.00$00Aug 19, 2025
Aug 15, 2025David A Brown
director
MOption exercise
Stock Option (Right to Buy)derivative
+18,750$0.00$018,750Aug 19, 2025
Aug 15, 2025Thomas P. Gallagher
Chairman & CEO
CConversion
Common Stock
+573,963--585,963Aug 19, 2025
Aug 15, 2025John Beckelman
director
MOption exercise
Stock Option (Right to Buy)derivative
+8,667$0.00$08,667Aug 19, 2025
Aug 15, 2025Harish Jayabalan
EVP, CISO and CRO
CConversion
Common Stock
+43,442--50,385Aug 19, 2025
Aug 15, 2025Shelly Brown
EVP, Strat. Planning & BD
CConversion
Common Stock
+200,475--339,029Aug 19, 2025
Aug 15, 2025Edward Deitzel
EVP, CRO, CCO MIAX Exchanges
CConversion
Common Stock
+49,194--81,887Aug 19, 2025
Aug 15, 2025Kurt M. Eckert
director
CConversion
Nonvoting Common Stockderivative
-46,875$0.00$00Aug 19, 2025
Aug 15, 2025Barbara J. Comly
EVP, GC & Corporate Secretary
CConversion
Common Stock
+130,617--811,960Aug 19, 2025
Aug 15, 2025Douglas M. Schafer JR
EVP and CIO
CConversion
Common Stock
+387,296--537,796Aug 19, 2025
Aug 15, 2025John Smollen
EVP Traded Products & Relation
CConversion
Common Stockindirect: Held by Quivetneck Capital LLC of which Mr. Smollen is a managing member
+91,666--91,666Aug 19, 2025
Aug 15, 2025Judson Gray Teekell
director
CConversion
Common Stock
+31,242--62,338Aug 19, 2025
Aug 15, 2025Mark F. Raymond
director
CConversion
Common Stock
+26,327--43,827Aug 19, 2025
Aug 15, 2025Cynthia Schwarzkopf
director
CConversion
Common Stock
+45,058--81,308Aug 19, 2025
Aug 15, 2025David A Brown
director
MOption exercise
Stock Option (Right to Buy)derivative
-7,500$0.00$00Aug 19, 2025
Aug 15, 2025Shelly Brown
EVP, Strat. Planning & BD
CConversion
Series B Preferred Stockderivative
-500$0.00$00Aug 19, 2025
Aug 15, 2025Thomas P. Gallagher
Chairman & CEO
CConversion
Common Stockindirect: By Gallagher Investments, LLC
+135,395--2,040,494Aug 19, 2025
Aug 15, 2025Harish Jayabalan
EVP, CISO and CRO
CConversion
Series B Preferred Stockderivative
-500$0.00$00Aug 19, 2025

Insiders

Everyone who has filed a Form 4 here.

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

MIAX insider trading: MIAMI INTERNATIONAL HOLDINGS, INC. | InsiderTell