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

VICOR CORP

VICR · Nasdaq · CIK 0000751978 · Technology · Electronic Components

INSIDER SIGNAL

No active buy signal

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

741 Form 4 transaction lines observed in the same window
664 sales · 77 option, withholding, award, gift or other lines

Last qualifying purchase2023-08-31 · Fendelet Quentin A. · $11.4K

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
VINCIARELLI PATRIZIOChairman & CEO
▼▼▼▼▼▼▼▼▼▼▼▼▼
Davies Philip DCorp. VP-Global Sales & Mktg.
○▼○▼○▼○▼
D'Amico AndrewDirector
○▼○▼○▼○▼
Schmidt James FCFO, Treasurer, Secretary
○▼○▼○▼
Lavie ZmiraDirector
○▼○▼
ANDERSON SAMUEL JDirector
▼○
● Purchase▼ Sale○ Other

Showing the six most active owners; 1 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: 2023-08-31 · Fendelet Quentin A..

Recent Form 4 activity

0Purchases
1,043Sales
192Other Form 4 lines
162SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING664 sale line(s) · context only
OTHER77 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
2,413,976
Previous report
2,045,907
Avg daily volume
1,089,067
Days to cover
2.2

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
2023-08-31Fendelet Quentin A.Purchase (P)Common Stock280USD 40.68USD 11,390SEC filing ↗
2023-02-28Fendelet Quentin A.Purchase (P)Common Stock571USD 39.95USD 22,811SEC filing ↗
2021-05-12Doyle AlvaroPurchase (P)Common Stock10USD 77.18USD 772SEC filing ↗

Form 4 evidence

1,235 transaction lines in the latest 365-day window; 1,768 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-02VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 310.12USD 6,202,343SEC filing ↗
2026-10-01VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 316.13USD 6,322,515SEC filing ↗
2026-10-01Davies Philip DSale (S)Common Stock3,072USD 316.37USD 971,882SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-02VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 310.12USD 6,202,343SEC filing ↗
2026-10-01VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 316.13USD 6,322,515SEC filing ↗
2026-10-01Davies Philip DSale (S)Common Stock3,072USD 316.37USD 971,882SEC filing ↗
2026-10-01Davies Philip DOption exercise / conversion (M)Common Stock3,072USD 36.09USD 110,874SEC filing ↗
2026-09-01Davies Philip DSale (S)Common Stock3,073USD 177.70USD 546,080SEC filing ↗
2026-09-01Davies Philip DOption exercise / conversion (M)Common Stock3,073USD 41.61USD 127,868SEC filing ↗
2026-08-20ANDERSON SAMUEL JOption exercise / conversion (M)Common Stock3,409USD 46.94USD 160,007SEC filing ↗
2026-08-17Lavie ZmiraSale (S)Common Stock908USD 250.00USD 227,000SEC filing ↗
2026-08-17Lavie ZmiraOption exercise / conversion (M)Common Stock908USD 44.07USD 40,016SEC filing ↗
2026-08-17ANDERSON SAMUEL JSale (S)Common Stock2,073USD 252.60USD 523,640SEC filing ↗
2026-08-03Davies Philip DSale (S)Common Stock3,072USD 211.69USD 650,312SEC filing ↗
2026-08-03Davies Philip DOption exercise / conversion (M)Common Stock3,072USD 41.61USD 127,826SEC filing ↗
2026-07-24EICHTEN ESTIA JOption exercise / conversion (M)Common Stock5,987USD 33.42USD 200,107SEC filing ↗
2026-07-23Lavie ZmiraSale (S)Common Stock1,216USD 224.72USD 273,260SEC filing ↗
2026-07-23Lavie ZmiraOption exercise / conversion (M)Common Stock1,216USD 32.89USD 39,994SEC filing ↗
2026-07-06VINCIARELLI PATRIZIOSale (S)Common Stock700USD 302.41USD 211,684SEC filing ↗
2026-07-02VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 318.88USD 6,377,615SEC filing ↗
2026-07-01VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 356.68USD 7,133,677SEC filing ↗
2026-07-01Davies Philip DSale (S)Common Stock3,073USD 356.97USD 1,096,966SEC filing ↗
2026-07-01Davies Philip DOption exercise / conversion (M)Common Stock3,073USD 33.33USD 102,419SEC filing ↗
2026-06-30VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 375.04USD 7,500,808SEC filing ↗
2026-06-29VINCIARELLI PATRIZIOSale (S)Common Stock8,760USD 366.98USD 3,214,710SEC filing ↗
2026-06-29VINCIARELLI PATRIZIOSale (S)Common Stock11,240USD 345.04USD 3,878,212SEC filing ↗
2026-06-26VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 323.05USD 6,461,089SEC filing ↗
2026-06-26D'Amico AndrewSale (S)Common Stock331USD 319.53USD 105,764SEC filing ↗
2026-06-26D'Amico AndrewOption exercise / conversion (M)Common Stock331USD 60.37USD 19,982SEC filing ↗
2026-06-25VINCIARELLI PATRIZIOSale (S)Common Stock20,000USD 330.55USD 6,611,097SEC filing ↗
2026-06-25Schmidt James FSale (S)Common Stock1,000USD 331.68USD 331,682SEC filing ↗
2026-06-25Schmidt James FOption exercise / conversion (M)Common Stock1,000USD 100.00USD 100,000SEC filing ↗
2026-06-25D'Amico AndrewSale (S)Common Stock200USD 336.82USD 67,364SEC 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 · —
TickerVICR
CIK0000751978
SectorTechnology
IndustryElectronic Components Yahoo Finance
SEC SIC3679 Electronic Components, NEC
ExchangeNasdaq

Data coverage

Local Form 4 history1,768 transaction lines from 2020-04-24 to 2026-10-02
3 P purchase lines · 1,362 S sale lines · 403 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.