Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

MeiraGTx Holdings plc

MGTX · Nasdaq · CIK 0001735438 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

8 Form 4 transaction lines observed in the same window
6 sales · 2 option, withholding, award, gift or other lines

Last qualifying purchase2024-08-12 · EDELMAN JOSEPH; PERCEPTIVE ADVISORS LLC; PERCEPTIVE LIFE SCIENCES MASTER FUND LTD · $5.0M

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Giroux RichardCFO & COO
○▼
Forbes AlexandriaPRESIDENT & CEO
▼▼
Naylor StuartCHIEF SCI OFCR, OPHTHALMOLOGY
▼▼
Harris Keith R.Director
○
● Purchase▼ Sale○ Other

—

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2024-08-12 · EDELMAN JOSEPH; PERCEPTIVE ADVISORS LLC; PERCEPTIVE LIFE SCIENCES MASTER FUND LTD.

Recent Form 4 activity

0Purchases
10Sales
36Other Form 4 lines
30SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING6 sale line(s) · context only
OTHER2 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
5,996,760
Previous report
4,011,818
Avg daily volume
1,190,432
Days to cover
5.0

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2024-08-12EDELMAN JOSEPH; PERCEPTIVE ADVISORS LLC; PERCEPTIVE LIFE SCIENCES MASTER FUND LTDPurchase (P)Ordinary Shares1,250,000USD 4.00USD 5,000,000SEC filing ↗
2023-05-05EDELMAN JOSEPH; PERCEPTIVE ADVISORS LLC; PERCEPTIVE LIFE SCIENCES MASTER FUND LTDPurchase (P)Ordinary Shares4,347,826USD 5.75USD 25,000,000SEC filing ↗
2022-06-03Zeldin Robert KPurchase (P)Ordinary Shares5,000USD 7.90USD 39,500SEC filing ↗
2022-05-25Wollin Robert JPurchase (P)Ordinary Shares1,000USD 7.94USD 7,940SEC filing ↗
2020-11-23EDELMAN JOSEPH; PERCEPTIVE ADVISORS LLC; PERCEPTIVE LIFE SCIENCES MASTER FUND LTDPurchase (P)Ordinary Shares500,000USD 12.85USD 6,425,000SEC filing ↗

Form 4 evidence

46 transaction lines in the latest 365-day window; 236 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-06Naylor StuartSale (S)Ordinary Shares27,659USD 10.64USD 294,292SEC filing ↗
2026-08-18Forbes AlexandriaSale (S)Ordinary Shares62,000USD 13.86USD 859,320SEC filing ↗
2026-07-21Giroux RichardSale (S)Ordinary Shares56,000USD 12.51USD 700,560SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-06Naylor StuartSale (S)Ordinary Shares27,659USD 10.64USD 294,292SEC filing ↗
2026-08-18Forbes AlexandriaSale (S)Ordinary Shares62,000USD 13.86USD 859,320SEC filing ↗
2026-07-21Giroux RichardSale (S)Ordinary Shares56,000USD 12.51USD 700,560SEC filing ↗
2026-07-07Naylor StuartSale (S)Ordinary Shares27,659USD 14.80USD 409,470SEC filing ↗
2026-06-10Harris Keith R.Option exercise / conversion (M)Ordinary Shares75,000USD —USD —SEC filing ↗
2026-05-27Giroux RichardGift (G)Ordinary Shares7,000USD 0.00USD 0SEC filing ↗
2026-05-19Forbes AlexandriaSale (S)Ordinary Shares62,000USD 9.17USD 568,540SEC filing ↗
2026-04-21Giroux RichardSale (S)Ordinary Shares56,000USD 10.22USD 572,320SEC filing ↗
2026-04-17EDELMAN JOSEPH; PERCEPTIVE ADVISORS LLC; PERCEPTIVE LIFE SCIENCES MASTER FUND LTDAward / grant (A)Ordinary Shares555,555USD 9.00USD 4,999,995SEC filing ↗
2026-04-07Naylor StuartSale (S)Ordinary Shares27,661USD 9.36USD 258,907SEC filing ↗
2026-03-24Forbes AlexandriaSale (S)Ordinary Shares62,000USD 7.41USD 459,420SEC filing ↗
2026-02-21Zeldin Robert KOption exercise / conversion (M)Ordinary Shares7,500USD —USD —SEC filing ↗
2026-02-21Zeldin Robert KTax withholding (F)Ordinary Shares2,952USD 7.45USD 21,992SEC filing ↗
2026-02-21Wollin Robert JOption exercise / conversion (M)Ordinary Shares11,250USD —USD —SEC filing ↗
2026-02-21Wollin Robert JTax withholding (F)Ordinary Shares5,949USD 7.45USD 44,320SEC filing ↗
2026-02-21Naylor StuartOption exercise / conversion (M)Ordinary Shares25,000USD —USD —SEC filing ↗
2026-02-21Naylor StuartTax withholding (F)Ordinary Shares11,750USD 7.45USD 87,538SEC filing ↗
2026-02-21Giroux RichardOption exercise / conversion (M)Ordinary Shares60,000USD —USD —SEC filing ↗
2026-02-21Giroux RichardTax withholding (F)Ordinary Shares31,726USD 7.45USD 236,359SEC filing ↗
2026-02-21Forbes AlexandriaOption exercise / conversion (M)Ordinary Shares62,500USD —USD —SEC filing ↗
2026-02-21Forbes AlexandriaTax withholding (F)Ordinary Shares33,048USD 7.45USD 246,208SEC filing ↗
2026-01-17Zeldin Robert KOption exercise / conversion (M)Ordinary Shares35,000USD —USD —SEC filing ↗
2026-01-17Zeldin Robert KTax withholding (F)Ordinary Shares13,951USD 7.42USD 103,516SEC filing ↗
2026-01-17Wollin Robert JOption exercise / conversion (M)Ordinary Shares50,000USD —USD —SEC filing ↗
2026-01-17Wollin Robert JTax withholding (F)Ordinary Shares27,206USD 7.42USD 201,869SEC filing ↗
2026-01-17Naylor StuartOption exercise / conversion (M)Ordinary Shares75,000USD —USD —SEC filing ↗
2026-01-17Naylor StuartTax withholding (F)Ordinary Shares35,250USD 7.42USD 261,555SEC filing ↗
2026-01-17Giroux RichardOption exercise / conversion (M)Ordinary Shares310,000USD —USD —SEC filing ↗
2026-01-17Giroux RichardTax withholding (F)Ordinary Shares163,916USD 7.42USD 1,216,257SEC filing ↗
2026-01-17Forbes AlexandriaOption exercise / conversion (M)Ordinary Shares310,000USD —USD —SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerMGTX
CIK0001735438
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2836 Biological Products, (No Diagnostic Substances)
ExchangeNasdaq

Data coverage

Local Form 4 history236 transaction lines from 2020-01-21 to 2026-10-06
6 P purchase lines · 86 S sale lines · 144 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.