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Public ownership evidence

Miami International Holdings, Inc. (MIAX) Ownership Disclosures

Read MIAX insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-11-052026-11-04Schafer Douglas M. JRS8,000Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-11-04 and its public availability date is 2026-11-05. Subtracting those calendar dates gives 1 day of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0002079445-26-000021 ↗SEC 0002079445-26-000021 ↗SEC 0002080878-26-000020 ↗

Recent Form 4 activity

Inspect all 17 displayed rows: Recent Form 4 activity

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2026-11-052026-11-04Schafer Douglas M. JRS8,000Not reported
2026-11-052026-11-03Schafer Douglas M. JRS40,000Not reported
2026-11-042026-11-04Comly Barbara J.S56,022Not reported
2026-11-042026-11-02Comly Barbara J.S23,339Not reported
2026-10-262026-10-22Comly Barbara J.S12,306Not reported
2026-10-262026-10-22Schafer Douglas M. JRS8,000Not reported
2026-10-062026-10-02Schafer Douglas M. JRS40,000Not reported
2026-09-172026-09-16Brown ShellyS21,217Not reported
2026-09-052026-09-02Comly Barbara J.S44,445Not reported
2026-09-052026-09-03Deitzel EdwardS11,000Not reported
2026-09-052026-09-03Gallagher Thomas P.S47,000Not reported
2026-09-052026-09-02Schafer Douglas M. JRS48,000Not reported
2026-09-052026-09-02Teekell Judson GrayS3,000Not reported
2026-09-052026-09-02Teekell Judson GrayS5,545Not reported
2026-08-212026-08-19Gallagher Thomas P.S149,700Not reported
2026-08-202026-08-17Schwarzkopf CynthiaS5,000Not reported
2026-08-202026-08-17Emmons LanceS35,000Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-03-312026-08-2912$467None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-03-312026-08-2624,500$953,540None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2522,175$824,023None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25824,023$22,175,000None
Assenagon Asset Management S.A.2026-06-302026-08-22297,832$11,067,437None
Goodwin Investment Advisory2026-06-302026-08-2028,025$1,041,409None
Coastal Bridge Advisors, LLC2026-06-302026-08-18183,761$6,828,559None
Grandeur Peak Global Advisors, LLC2026-06-302026-08-1819,018$706,709None
Jefferies Financial Group Inc.2026-06-302026-08-1810,968$407,571None
SEI INVESTMENTS CO2026-06-302026-08-15306,219$11,379,098None
SEI INVESTMENTS CO2026-06-302026-08-15843$31,280None
Sone Capital Management, LLC2026-06-302026-08-15138,903$5,161,635None
SALT Holding Corp.2026-06-302026-08-1515,173$563,829None
TORNO CAPITAL, LLC2026-06-302026-08-155,000$185,800Call
TORNO CAPITAL, LLC2026-06-302026-08-152,700$100,332Put
Quarry LP2026-06-302026-08-1540$1,486None
Nearwater Capital Markets, Ltd2026-06-302026-08-15279,000$10,367,640None
T. Rowe Price Investment Management, Inc.2026-06-302026-08-155,032,970$187,026,000None
XTX Topco Ltd2026-06-302026-08-15170,856$6,349,009None
Vinva Investment Management Ltd2026-06-302026-08-158,879$475,269None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15373,541$13,880,784None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15373,541$13,880,784None
Qube Research & Technologies Ltd2026-06-302026-08-15101,105$3,757,062None
Caption Management, LLC2026-06-302026-08-1551,000$1,895,160Call
OSAIC HOLDINGS, INC.2026-06-302026-08-15150,461$5,591,131None
OSAIC HOLDINGS, INC.2026-06-302026-08-15280$10,405None
OSAIC HOLDINGS, INC.2026-06-302026-08-157,161$266,096None
Schonfeld Strategic Advisors LLC2026-06-302026-08-15200,181$7,438,724None
MetLife Investment Management, LLC2026-06-302026-08-1544,772$1,663,728None
Engineers Gate Manager LP2026-06-302026-08-1532,087$1,192,353None
BlueCrest Capital Management Ltd2026-06-302026-08-15200,000$7,432,000None
JANE STREET GROUP, LLC2026-06-302026-08-1543,900$1,631,324Put
JANE STREET GROUP, LLC2026-06-302026-08-1570,300$2,612,348Call
Grandeur Peak Global Advisors, LLC2026-06-302026-08-1518,512$583,128None
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-1516,946$629,713None
Legal & General Group Plc2026-06-302026-08-158,589$319,168None
Legal & General Group Plc2026-06-302026-08-153,511$130,469None
Legal & General Group Plc2026-06-302026-08-157,430$276,099None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15302,400$11,237,184Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15138,100$5,131,796Put
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1530,346$1,127,657None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-153,324,697$123,545,741None
FJ Capital Management LLC2026-06-302026-08-15119,299$4,433,151None
SEVEN GRAND MANAGERS, LLC2026-06-302026-08-15550,000$20,438,000None
Hudson Bay Capital Management LP2026-06-302026-08-15190,223$7,068,687None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-15189,105$7,027,142None
TWINBEECH CAPITAL LP2026-06-302026-08-1542,572$1,581,976None
Philadelphia Financial Management of San Francisco, LLC2026-06-302026-08-15223,715$8,313,249None
North Reef Capital Management LP2026-06-302026-08-15251,354$9,340,315None
Atom Investors LP2026-06-302026-08-1513,944$518,159None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗VIRGINIA RETIREMENT SYSTEMS ET Al ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Assenagon Asset Management S.A. ↗Goodwin Investment Advisory ↗Coastal Bridge Advisors, LLC ↗Grandeur Peak Global Advisors, LLC ↗Jefferies Financial Group Inc. ↗SEI INVESTMENTS CO ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.