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

IMPINJ INC

PI · Nasdaq · CIK 0001114995 · Technology · Semiconductors

INSIDER SIGNAL

No active buy signal

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

55 Form 4 transaction lines observed in the same window
28 sales · 27 option, withholding, award, gift or other lines

Last qualifying purchase2024-09-16 · Gibson Daniel Patrick; SYLEBRA CAPITAL LLC; Sylebra Capital Ltd · value unavailable

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
SYLEBRA CAPITAL LLCDirector
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
DIORIO CHRIS PH.D.CHIEF EXECUTIVE OFFICER
○○○○○○○○○○○○
Baker CaryCHIEF FINANCIAL OFFICER
○○▼○○▼○○
WASHINGTON MIRONDirector
○▼
Sanghi SteveDirector
○
Rao MeeraDirector
○
● 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: 2024-09-16 · Gibson Daniel Patrick; SYLEBRA CAPITAL LLC; Sylebra Capital Ltd.

Recent Form 4 activity

0Purchases
51Sales
51Other Form 4 lines
53SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING28 sale line(s) · context only
OTHER27 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
2,701,173
Previous report
3,031,264
Avg daily volume
410,042
Days to cover
6.6

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
2024-09-16Gibson Daniel Patrick; SYLEBRA CAPITAL LLC; Sylebra Capital LtdPurchase (P)Common Stock—USD —USD —SEC filing ↗
2024-09-13Gibson Daniel Patrick; SYLEBRA CAPITAL LLC; Sylebra Capital LtdPurchase (P)Common Stock4,264,393USD 4.69USD 20,000,003SEC filing ↗
2023-11-20Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock37,513USD 82.91USD 3,110,203SEC filing ↗
2023-11-17Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock41,252USD 81.01USD 3,341,825SEC filing ↗
2023-11-16Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock35,510USD 79.61USD 2,826,951SEC filing ↗
2023-11-15Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock52,518USD 79.97USD 4,199,864SEC filing ↗
2023-11-14Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock48,311USD 79.44USD 3,837,826SEC filing ↗
2023-11-13Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock33,682USD 73.16USD 2,464,175SEC filing ↗
2023-08-31Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock79,370USD 66.11USD 5,247,151SEC filing ↗
2023-08-30Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock126,427USD 63.32USD 8,005,358SEC filing ↗
2023-08-29Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock28,579USD 63.27USD 1,808,193SEC filing ↗
2023-08-22Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock74,771USD 59.49USD 4,448,127SEC filing ↗
2023-08-21Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock48,171USD 58.45USD 2,815,595SEC filing ↗
2023-08-16Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock190,569USD 60.02USD 11,437,951SEC filing ↗
2023-08-15Gibson Daniel Patrick; Sylebra Capital LtdPurchase (P)Common Stock225,182USD 61.20USD 13,781,138SEC filing ↗

Form 4 evidence

102 transaction lines in the latest 365-day window; 1,301 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12DIORIO CHRIS PH.D.Gift (G)Common Stock10,000USD 0.00USD 0SEC filing ↗
2026-09-23DIORIO CHRIS PH.D.Option exercise / conversion (M)Common Stock3,041USD 0.00USD 0SEC filing ↗
2026-09-23DIORIO CHRIS PH.D.Tax withholding (F)Common Stock1,197USD 177.20USD 212,108SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12DIORIO CHRIS PH.D.Gift (G)Common Stock10,000USD 0.00USD 0SEC filing ↗
2026-09-23DIORIO CHRIS PH.D.Option exercise / conversion (M)Common Stock3,041USD 0.00USD 0SEC filing ↗
2026-09-23DIORIO CHRIS PH.D.Tax withholding (F)Common Stock1,197USD 177.20USD 212,108SEC filing ↗
2026-09-23Baker CaryOption exercise / conversion (M)Common Stock1,075USD 0.00USD 0SEC filing ↗
2026-09-23Baker CaryTax withholding (F)Common Stock424USD 177.20USD 75,133SEC filing ↗
2026-09-21Baker CarySale (S)Common Stock8,892USD 185.00USD 1,645,020SEC filing ↗
2026-09-15WASHINGTON MIRONSale (S)Common Stock800USD 173.26USD 138,608SEC filing ↗
2026-09-14DIORIO CHRIS PH.D.Gift (G)Common Stock10,000USD 0.00USD 0SEC filing ↗
2026-08-20DIORIO CHRIS PH.D.Option exercise / conversion (M)Common Stock3,753USD 0.00USD 0SEC filing ↗
2026-08-20DIORIO CHRIS PH.D.Tax withholding (F)Common Stock1,477USD 159.73USD 235,921SEC filing ↗
2026-08-20Baker CaryOption exercise / conversion (M)Common Stock1,739USD 0.00USD 0SEC filing ↗
2026-08-20Baker CaryTax withholding (F)Common Stock685USD 159.73USD 109,415SEC filing ↗
2026-08-17DIORIO CHRIS PH.D.Gift (G)Common Stock10,000USD 0.00USD 0SEC filing ↗
2026-08-10Baker CarySale (S)Common Stock1,429USD 185.00USD 264,365SEC filing ↗
2026-07-13DIORIO CHRIS PH.D.Gift (G)Common Stock10,000USD 0.00USD 0SEC filing ↗
2026-06-23DIORIO CHRIS PH.D.Option exercise / conversion (M)Common Stock3,040USD 0.00USD 0SEC filing ↗
2026-06-23DIORIO CHRIS PH.D.Tax withholding (F)Common Stock1,197USD 125.22USD 149,888SEC filing ↗
2026-06-23Baker CaryOption exercise / conversion (M)Common Stock1,076USD 0.00USD 0SEC filing ↗
2026-06-23Baker CaryTax withholding (F)Common Stock424USD 125.22USD 53,093SEC filing ↗
2026-06-15DIORIO CHRIS PH.D.Gift (G)Common Stock10,000USD 0.00USD 0SEC filing ↗
2026-06-09SYLEBRA CAPITAL LLCSale (S)Common Stock19,105USD 127.36USD 2,433,213SEC filing ↗
2026-06-09SYLEBRA CAPITAL LLCSale (S)Common Stock12,105USD 127.36USD 1,541,693SEC filing ↗
2026-06-08SYLEBRA CAPITAL LLCSale (S)Common Stock45,528USD 128.94USD 5,870,462SEC filing ↗
2026-06-08SYLEBRA CAPITAL LLCSale (S)Common Stock45,528USD 128.94USD 5,870,462SEC filing ↗
2026-06-05SYLEBRA CAPITAL LLCSale (S)Common Stock47,479USD 124.06USD 5,890,082SEC filing ↗
2026-06-04SYLEBRA CAPITAL LLCSale (S)Common Stock33,412USD 136.84USD 4,572,098SEC filing ↗
2026-06-03SYLEBRA CAPITAL LLCSale (S)Common Stock6,313USD 139.17USD 878,580SEC filing ↗
2026-06-02SYLEBRA CAPITAL LLCSale (S)Common Stock38,724USD 142.31USD 5,510,812SEC filing ↗
2026-06-01SYLEBRA CAPITAL LLCSale (S)Common Stock7,163USD 144.29USD 1,033,549SEC filing ↗
2026-05-29SYLEBRA CAPITAL LLCSale (S)Common Stock48,504USD 150.78USD 7,313,433SEC 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 · —
TickerPI
CIK0001114995
SectorTechnology
IndustrySemiconductors Yahoo Finance
SEC SIC3679 Electronic Components, NEC
ExchangeNasdaq

Data coverage

Local Form 4 history1,301 transaction lines from 2020-01-02 to 2026-10-12
36 P purchase lines · 757 S sale lines · 508 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.