MGTX · Insider trading · 13F holders · Congress trades
MeiraGTx Holdings plc (MGTX)
Who is buying and selling MGTX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 12
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $1.7M
- Congress trades, 12 months
- 0
MGTX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 3 MGTX insiders filed 3 sales worth $1.7M on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
- 12 13F filers hold MGTX among their 50 largest positions, worth $633.1M combined, including Joseph Edelman. The biggest bets by portfolio weight are Sanofi (30.9%), Johnson & Johnson (9.6%) and Knoll Capital Management, LLC (7.9%). In their latest 13Fs, 0 managers opened a new position and 2 added to one.
- No member of Congress has disclosed a trade in MGTX.
- MGTX last closed at $9.71 on Oct 29, 2026.
MGTX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 3 MGTX insiders filed 3 sales worth $1.7M on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 20, 2026 | Giroux Richard | CFO & COO | Sale10b5-1 | 56,000 | $9.95 | $557K | SEC |
| Oct 6, 2026 | Naylor Stuart | CHIEF SCI OFCR, OPHTHALMOLOGY | Sale10b5-1 | 27,659 | $10.64 | $294K | SEC |
| Aug 18, 2026 | Forbes Alexandria | PRESIDENT & CEO, Director | Sale10b5-1 | 62,000 | $13.86 | $859K | SEC |
Who owns MGTX? Hedge funds and superinvestors
12 13F filers hold MGTX among their 50 largest positions, worth $633.1M combined, including Joseph Edelman. The biggest bets by portfolio weight are Sanofi (30.9%), Johnson & Johnson (9.6%) and Knoll Capital Management, LLC (7.9%). In their latest 13Fs, 0 managers opened a new position and 2 added to one.
Superinvestors holding MGTX: Joseph Edelman 2.3%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| SanofiCorporation | 30.9% | $164.8M | 12,197,737 | +0.0% shares | Q2 2026 |
| Joseph EdelmanHedge fund | 2.3% | $145.7M | 10,786,658 | +4.5% shares | Q2 2026 |
| Rubric Capital Management LPHedge fund | 1.1% | $122.9M | 9,100,000 | +30.0% shares | Q2 2026 |
| Johnson & JohnsonCorporation | 9.6% | $73.1M | 6,641,064 | +0.0% shares | Q3 2026 |
| Opaleye Management Inc.Hedge fund | 4.3% | $48.0M | 3,550,000 | +67.2% shares | Q2 2026 |
| 683 Capital Management, LLCHedge fund | 3.0% | $31.1M | 2,300,000 | -6.1% shares | Q2 2026 |
| Knoll Capital Management, LLCHedge fund | 7.9% | $16.9M | 1,250,000 | +0.0% shares | Q2 2026 |
| Long Focus Capital Management, LLCHedge fund | 0.6% | $14.6M | 1,080,300 | — | Q2 2026 |
| Heights Capital Management, IncAsset manager | 2.7% | $11.5M | 850,000 | — | Q2 2026 |
| Privium Fund Management B.V.Asset manager | 0.5% | $2.6M | 196,112 | -7.5% shares | Q2 2026 |
| Prosight Management, LPHedge fund | 0.2% | $1.2M | 90,000 | -96.6% shares | Q2 2026 |
| AlphaCentric Advisors LLCMutual fund manager | 0.6% | $736K | 54,469 | — | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 1, Q2 2026: 11). Screen MGTX in the grand portfolio →
MGTX stock trades by members of Congress
No member of Congress has disclosed a trade in MGTX.
Analysis mentioning MGTX
Posts from the blog that cover MeiraGTx Holdings plc, newest first.
MGTX questions and answers
Are insiders buying MGTX stock?
Between Aug 1, 2026 and Oct 29, 2026, 3 MGTX insiders filed 3 sales worth $1.7M on SEC Form 4, and no open-market purchases; 3 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own MGTX?
12 13F filers hold MGTX among their 50 largest positions, worth $633.1M combined, including Joseph Edelman. The biggest bets by portfolio weight are Sanofi (30.9%), Johnson & Johnson (9.6%) and Knoll Capital Management, LLC (7.9%). In their latest 13Fs, 0 managers opened a new position and 2 added to one.
Has Congress traded MGTX?
No member of Congress has disclosed a trade in MGTX.
Who is the largest holder of MGTX?
Among 13F filers, Sanofi reports the largest MGTX position, $164.8M (12,197,737 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Sanofi's: 30.9% of its portfolio.
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