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

InterDigital, Inc.

IDCC · Nasdaq · CIK 0001405495 · Technology · Software—Application

INSIDER SIGNAL

No active buy signal

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

56 Form 4 transaction lines observed in the same window
15 sales · 41 option, withholding, award, gift or other lines

Last qualifying purchase2022-10-11 · KRITZMACHER JOHN A · $2.3K

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.

Insider activity timeline

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

AprMayJunJulAugSepOct
Pankaj RajeshChief Technology Officer
○▼▼▼▼○▼▼▼
Markley John D. Jr.Director
○○○▼○
RANKIN JEAN FDirector
○○○▼○
KRITZMACHER JOHN ADirector
○○○▼○
Armaly SamirDirector
○○○▼○
ABERLE DEREK KDirector
○○○▼○
● Purchase▼ Sale○ Other

Showing the six most active owners; 6 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: 2022-10-11 · KRITZMACHER JOHN A.

Recent Form 4 activity

0Purchases
97Sales
91Other Form 4 lines
99SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING15 sale line(s) · context only
OTHER41 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
2,824,358
Previous report
2,918,161
Avg daily volume
217,170
Days to cover
13.0

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
2022-10-11KRITZMACHER JOHN APurchase (P)Common Stock49USD 47.32USD 2,319SEC filing ↗

Form 4 evidence

188 transaction lines in the latest 365-day window; 942 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-05Pankaj RajeshSale (S)Common Stock1,500USD 334.32USD 501,480SEC filing ↗
2026-09-15Mattis Julia CTax withholding (F)Common Stock325USD 340.38USD 110,624SEC filing ↗
2026-09-15Mattis Julia CD (D)Common Stock1USD 340.38USD 279SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-05Pankaj RajeshSale (S)Common Stock1,500USD 334.32USD 501,480SEC filing ↗
2026-09-15Mattis Julia CTax withholding (F)Common Stock325USD 340.38USD 110,624SEC filing ↗
2026-09-15Mattis Julia CD (D)Common Stock1USD 340.38USD 279SEC filing ↗
2026-09-15Chen Lawrence LirenTax withholding (F)Common Stock20,896USD 340.38USD 7,112,580SEC filing ↗
2026-09-15Chen Lawrence LirenD (D)Common Stock5USD 340.38USD 1,651SEC filing ↗
2026-09-15Chen Lawrence LirenAward / grant (A)Common Stock48,070USD 0.00USD 0SEC filing ↗
2026-09-08Pankaj RajeshSale (S)Common Stock1,500USD 338.00USD 507,000SEC filing ↗
2026-08-07Gillman Joan HSale (S)Common Stock300USD 331.06USD 99,318SEC filing ↗
2026-08-05Pankaj RajeshSale (S)Common Stock1,500USD 324.88USD 487,320SEC filing ↗
2026-07-22Schmidt Joshua D.Award / grant (A)Common Stock27USD 0.00USD 0SEC filing ↗
2026-07-22RANKIN JEAN FAward / grant (A)Common Stock2USD 0.00USD 0SEC filing ↗
2026-07-22Pankaj RajeshAward / grant (A)Common Stock39USD 0.00USD 0SEC filing ↗
2026-07-22Mattis Julia CAward / grant (A)Common Stock24USD 0.00USD 0SEC filing ↗
2026-07-22Markley John D. Jr.Award / grant (A)Common Stock9USD 0.00USD 0SEC filing ↗
2026-07-22KRITZMACHER JOHN AAward / grant (A)Common Stock2USD 0.00USD 0SEC filing ↗
2026-07-22HUTCHESON STEWART DAward / grant (A)Common Stock54USD 0.00USD 0SEC filing ↗
2026-07-22Gillman Joan HAward / grant (A)Common Stock57USD 0.00USD 0SEC filing ↗
2026-07-22Chen Lawrence LirenAward / grant (A)Common Stock78USD 0.00USD 0SEC filing ↗
2026-07-22BREZSKI RICHARDAward / grant (A)Common Stock36USD 0.00USD 0SEC filing ↗
2026-07-22Armaly SamirAward / grant (A)Common Stock2USD 0.00USD 0SEC filing ↗
2026-07-22ABERLE DEREK KAward / grant (A)Common Stock2USD 0.00USD 0SEC filing ↗
2026-07-06Pankaj RajeshSale (S)Common Stock1,500USD 286.00USD 429,000SEC filing ↗
2026-06-22Markley John D. Jr.Sale (S)Common Stock400USD 300.00USD 120,000SEC filing ↗
2026-06-12RANKIN JEAN FSale (S)Common Stock365USD 276.64USD 100,974SEC filing ↗
2026-06-12KRITZMACHER JOHN ASale (S)Common Stock365USD 276.64USD 100,974SEC filing ↗
2026-06-12Armaly SamirSale (S)Common Stock470USD 276.64USD 130,021SEC filing ↗
2026-06-12ABERLE DEREK KSale (S)Common Stock522USD 276.64USD 144,406SEC filing ↗
2026-06-11RANKIN JEAN FD (D)Common Stock1USD 253.91USD 218SEC filing ↗
2026-06-11Pankaj RajeshSale (S)Common Stock1,500USD 290.00USD 435,000SEC filing ↗
2026-06-11Markley John D. Jr.D (D)Common Stock1USD 253.91USD 218SEC 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 · —
TickerIDCC
CIK0001405495
SectorTechnology
IndustrySoftware—Application Yahoo Finance
SEC SIC6794 Patent Owners & Lessors
ExchangeNasdaq

Data coverage

Local Form 4 history942 transaction lines from 2020-01-15 to 2026-10-05
1 P purchase lines · 263 S sale lines · 678 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.