Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

PTC THERAPEUTICS, INC.

PTCT · Nasdaq · CIK 0001070081 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

108 Form 4 transaction lines observed in the same window
76 sales · 32 option, withholding, award, gift or other lines

Last qualifying purchase2023-12-12 · Gravier Pierre · $198.7K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
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.

Insider activity timeline

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

AprMayJunJulAugSepOct
Almstead Neil GregoryCHIEF TECHNICAL OPS OFFICER
▼○▼○▼○▼○▼○▼
SCHMERTZLER MICHAELDirector
▼▼▼▼▼▼▼▼▼▼
Boulding Mark ElliottEXEC. VP AND CLO
○▼○▼○▼○▼○▼
STEELE GLENN JR MD PHDDirector
○▼
Smith Mary L.Director
○▼
Klein Matthew B.CHIEF EXECUTIVE OFFICER
▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 2 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

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

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: 2023-12-12 · Gravier Pierre.

Recent Form 4 activity

0Purchases
205Sales
92Other Form 4 lines
87SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING76 sale line(s) · context only
OTHER32 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
9,168,333
Previous report
9,738,919
Avg daily volume
1,493,955
Days to cover
6.1

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
2023-12-12Gravier PierrePurchase (P)Common Stock7,700USD 25.81USD 198,737SEC filing ↗
2020-03-16SCHMERTZLER MICHAELPurchase (P)Common Stock10,000USD 32.48USD 324,800SEC filing ↗

Form 4 evidence

297 transaction lines in the latest 365-day window; 1,099 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-14SCHMERTZLER MICHAELSale (S)Common Stock2,500USD 59.61USD 149,037SEC filing ↗
2026-10-09Boulding Mark ElliottSale (S)Common Stock192USD 64.26USD 12,338SEC filing ↗
2026-10-09Boulding Mark ElliottOption exercise / conversion (M)Common Stock192USD 39.42USD 7,569SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-14SCHMERTZLER MICHAELSale (S)Common Stock2,500USD 59.61USD 149,037SEC filing ↗
2026-10-09Boulding Mark ElliottSale (S)Common Stock192USD 64.26USD 12,338SEC filing ↗
2026-10-09Boulding Mark ElliottOption exercise / conversion (M)Common Stock192USD 39.42USD 7,569SEC filing ↗
2026-10-07SCHMERTZLER MICHAELSale (S)Common Stock2,500USD 63.39USD 158,480SEC filing ↗
2026-10-06Boulding Mark ElliottSale (S)Common Stock435USD 64.16USD 27,910SEC filing ↗
2026-10-06Boulding Mark ElliottOption exercise / conversion (M)Common Stock435USD 39.42USD 17,148SEC filing ↗
2026-10-05Boulding Mark ElliottSale (S)Common Stock1,638USD 64.03USD 104,881SEC filing ↗
2026-10-05Boulding Mark ElliottOption exercise / conversion (M)Common Stock1,638USD 39.42USD 64,570SEC filing ↗
2026-09-30STEELE GLENN JR MD PHDSale (S)Common Stock12,000USD 65.16USD 781,920SEC filing ↗
2026-09-30STEELE GLENN JR MD PHDOption exercise / conversion (M)Common Stock12,000USD 11.23USD 134,760SEC filing ↗
2026-09-17SCHMERTZLER MICHAELSale (S)Common Stock10,000USD 67.85USD 678,533SEC filing ↗
2026-09-16SCHMERTZLER MICHAELSale (S)Common Stock10,000USD 67.12USD 671,195SEC filing ↗
2026-09-10SCHMERTZLER MICHAELSale (S)Common Stock10,000USD 67.34USD 673,400SEC filing ↗
2026-09-09SCHMERTZLER MICHAELSale (S)Common Stock10,000USD 67.84USD 678,403SEC filing ↗
2026-08-27SCHMERTZLER MICHAELSale (S)Common Stock12,500USD 71.58USD 894,784SEC filing ↗
2026-08-26SCHMERTZLER MICHAELSale (S)Common Stock12,500USD 72.94USD 911,725SEC filing ↗
2026-08-20SCHMERTZLER MICHAELSale (S)Common Stock12,500USD 71.11USD 888,858SEC filing ↗
2026-08-19SCHMERTZLER MICHAELSale (S)Common Stock12,500USD 73.32USD 916,554SEC filing ↗
2026-08-17Boulding Mark ElliottSale (S)Common Stock2,813USD 72.57USD 204,127SEC filing ↗
2026-08-17Boulding Mark ElliottOption exercise / conversion (M)Common Stock2,813USD 25.69USD 72,266SEC filing ↗
2026-08-04Klein Matthew B.Sale (S)Common Stock10,292USD 68.57USD 705,722SEC filing ↗
2026-07-28Sollie-Zetlmayer Hege ElisabethAward / grant (A)Common Stock6,000USD 0.00USD 0SEC filing ↗
2026-07-14Gravier PierreSale (S)Common Stock3,494USD 80.35USD 280,743SEC filing ↗
2026-07-09Smith Mary L.Sale (S)Common Stock15,834USD 90.00USD 1,425,060SEC filing ↗
2026-07-09Smith Mary L.Option exercise / conversion (M)Common Stock15,834USD 42.95USD 680,070SEC filing ↗
2026-07-09Almstead Neil GregorySale (S)Common Stock2,464USD 90.25USD 222,376SEC filing ↗
2026-07-09Almstead Neil GregoryOption exercise / conversion (M)Common Stock2,464USD 46.54USD 114,675SEC filing ↗
2026-07-07Almstead Neil GregorySale (S)Common Stock24,613USD 88.89USD 2,187,745SEC filing ↗
2026-07-07Almstead Neil GregoryOption exercise / conversion (M)Common Stock24,613USD 39.42USD 970,244SEC filing ↗
2026-07-06Boulding Mark ElliottSale (S)Common Stock5,079USD 85.08USD 432,118SEC 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 date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerPTCT
CIK0001070081
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history1,099 transaction lines from 2020-01-02 to 2026-10-14
2 P purchase lines · 705 S sale lines · 392 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.