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Public ownership evidence

MeiraGTx Holdings plc Ordinary Shares (MGTX) Ownership Disclosures

Read MGTX 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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2026-10-212026-10-20Giroux RichardS56,000Not reported

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

The displayed observation date is 2026-10-20 and its public availability date is 2026-10-21. 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 0001742734-26-000022 ↗SEC 0001742771-26-000014 ↗SEC 0001092348-26-000006 ↗

Recent Form 4 activity

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2026-10-212026-10-20Giroux RichardS56,000Not reported
2026-10-072026-10-06Naylor StuartS27,659Not reported
2026-09-252026-09-23SEBULSKY ALANA100,000Not reported
2026-08-192026-08-18Forbes AlexandriaS62,000Not 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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CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2560,550$818,031None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25818,031$60,550,000None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2014,501$195,909None
Beacon Pointe Advisors, LLC2026-06-302026-08-1926,763$361,569None
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO2026-06-302026-08-1830,700$414,757None
SEI INVESTMENTS CO2026-06-302026-08-1547,600$643,076None
Quarry LP2026-06-302026-08-1545$608None
Ameritas Advisory Services, LLC2026-06-302026-08-1517$230None
DIADEMA PARTNERS LP2026-06-302026-08-158,368$113,052None
DIADEMA PARTNERS LP2026-06-302026-08-15500$6,755Call
XTX Topco Ltd2026-06-302026-08-1528,007$378,375None
Aquatic Capital Management LLC2026-06-302026-08-1587,064$1,176,235None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15142,434$1,924,283None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15142,434$1,924,283None
OSAIC HOLDINGS, INC.2026-06-302026-08-156$81None
OSAIC HOLDINGS, INC.2026-06-302026-08-15159$2,148None
Schonfeld Strategic Advisors LLC2026-06-302026-08-1512,634$170,684None
Squarepoint Ops LLC2026-06-302026-08-15162,412$2,194,186None
Trexquant Investment LP2026-06-302026-08-1565,393$883,459None
MetLife Investment Management, LLC2026-06-302026-08-1535,278$476,606None
Engineers Gate Manager LP2026-06-302026-08-1569,092$933,433None
Long Focus Capital Management, LLC2026-06-302026-08-151,080,300$14,594,853None
Legal & General Group Plc2026-06-302026-08-1517,684$238,734None
Legal & General Group Plc2026-06-302026-08-159,258$124,983None
Legal & General Group Plc2026-06-302026-08-155,838$78,813None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1548,474$654,884None
PFM Health Sciences, LP2026-06-302026-08-15455,286$6,150,914None
Opaleye Management Inc.2026-06-302026-08-153,550,000$47,960,500None
Prosight Management, LP2026-06-302026-08-1590,000$1,215,900None
J. Goldman & Co LP2026-06-302026-08-1582,800$1,118,628Call
J. Goldman & Co LP2026-06-302026-08-15601,972$8,132,642None
683 Capital Management, LLC2026-06-302026-08-152,300,000$31,073,000None
Hudson Bay Capital Management LP2026-06-302026-08-1510,190$137,667None
BROWN ADVISORY INC2026-06-302026-08-1550,000$675,500None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-152,971,752$40,148,370None
AMERIPRISE FINANCIAL INC2026-06-302026-08-154,900$66,199None
AMERIPRISE FINANCIAL INC2026-06-302026-08-1559,468$803,413None
Woodline Partners LP2026-06-302026-08-151,500,135$20,266,824None
ADAGE CAPITAL PARTNERS GP, L.L.C.2026-06-302026-08-154,400,000$59,444,000None
Ghisallo Capital Management LLC2026-06-302026-08-15200,000$2,702,000None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1551$689None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-151,500$20,265None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-154,258$57,526None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-151,831$24,737None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15188,943$2,552,620None
MANUFACTURERS LIFE INSURANCE COMPANY, THE2026-06-302026-08-1517,030$230,075None
ROYAL BANK OF CANADA2026-06-302026-08-15175$2,000None
ROYAL BANK OF CANADA2026-06-302026-08-1510,818$146,000None
ROYAL BANK OF CANADA2026-06-302026-08-151,827$25,000None
ALLIANCEBERNSTEIN L.P.2026-06-302026-08-1554,690$473,615None

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

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗MERCER GLOBAL ADVISORS INC /ADV ↗Beacon Pointe Advisors, LLC ↗PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO ↗SEI INVESTMENTS CO ↗Quarry LP ↗Ameritas Advisory Services, LLC ↗DIADEMA PARTNERS LP ↗DIADEMA PARTNERS LP ↗

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.