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

QUEST DIAGNOSTICS INC

DGX · NYSE · CIK 0001022079 · Healthcare · Diagnostics & Research

INSIDER SIGNAL

No active buy signal

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

29 Form 4 transaction lines observed in the same window
7 sales · 22 option, withholding, award, gift or other lines

Last qualifying purchaseNo qualifying purchase is present in the local Form 4 history.

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
KUPPUSAMY KARTHIKSVP, Clinical Solutions
○▼○
PREVOZNIK MICHAEL ESVP & General Counsel
○○▼
Davis J. E.CEO and President
▼▼
MAIN TIMOTHY LDirector
○○
Lassiter Wright IIIDirector
○○
Gregg Vicky BDirector
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 10 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.—

Recent Form 4 activity

0Purchases
30Sales
96Other Form 4 lines
71SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING7 sale line(s) · context only
OTHER22 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
3,417,577
Previous report
3,600,559
Avg daily volume
1,268,667
Days to cover
2.7

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

No qualifying code P equity purchase is present in the local Form 4 history.

Form 4 evidence

126 transaction lines in the latest 365-day window; 719 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-01Davis J. E.Sale (S)Common Stock10,000USD 242.72USD 2,427,200SEC filing ↗
2026-08-28PREVOZNIK MICHAEL ESale (S)Common Stock22,677USD 243.12USD 5,513,168SEC filing ↗
2026-08-28PREVOZNIK MICHAEL EOption exercise / conversion (M)Common Stock22,677USD 112.17USD 2,543,679SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-01Davis J. E.Sale (S)Common Stock10,000USD 242.72USD 2,427,200SEC filing ↗
2026-08-28PREVOZNIK MICHAEL ESale (S)Common Stock22,677USD 243.12USD 5,513,168SEC filing ↗
2026-08-28PREVOZNIK MICHAEL EOption exercise / conversion (M)Common Stock22,677USD 112.17USD 2,543,679SEC filing ↗
2026-08-28PREVOZNIK MICHAEL EGift (G)Common Stock1,000USD 0.00USD 0SEC filing ↗
2026-07-28DELANEY MARK ESale (S)Common Stock1,600USD 235.18USD 376,288SEC filing ↗
2026-07-22SAMAD SAMAward / grant (A)Common Stock102USD 206.81USD 21,095SEC filing ↗
2026-07-22Plewman PatrickL (L)Common Stock46USD 206.81USD 9,513SEC filing ↗
2026-07-22MAIN TIMOTHY LL (L)Common Stock21USD 206.81USD 4,343SEC filing ↗
2026-07-22Lassiter Wright IIIL (L)Common Stock6USD 206.81USD 1,241SEC filing ↗
2026-07-22KUPPUSAMY KARTHIKL (L)Common Stock37USD 206.81USD 7,652SEC filing ↗
2026-07-22Gregg Vicky BAward / grant (A)Common Stock72USD 206.81USD 14,890SEC filing ↗
2026-07-22DELANEY MARK EL (L)Common Stock34USD 206.81USD 7,032SEC filing ↗
2026-07-22CARTER ROBERT BL (L)Common Stock11USD 206.80USD 2,275SEC filing ↗
2026-06-04KUPPUSAMY KARTHIKSale (S)Common Stock8,147USD 200.00USD 1,629,400SEC filing ↗
2026-06-04KUPPUSAMY KARTHIKOption exercise / conversion (M)Common Stock8,147USD 124.22USD 1,012,040SEC filing ↗
2026-06-01Davis J. E.Sale (S)Common Stock10,000USD 194.14USD 1,941,400SEC filing ↗
2026-05-20WENTWORTH TIMOTHY CAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20RING TIMOTHY MAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20PFEIFFER GARY MAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20MORRISON DENISE MAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20MAIN TIMOTHY LAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20Lassiter Wright IIIAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20Gregg Vicky BAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20Doi TraceyAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20Diaz LuisAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-05-20CARTER ROBERT BAward / grant (A)Common Stock1,142USD 0.00USD 0SEC filing ↗
2026-04-20SAMAD SAMAward / grant (A)Common Stock108USD 194.70USD 21,028SEC filing ↗
2026-04-20Plewman PatrickL (L)Common Stock49USD 194.70USD 9,540SEC filing ↗
2026-04-20Lassiter Wright IIIL (L)Common Stock6USD 194.70USD 1,168SEC filing ↗
2026-04-20KUPPUSAMY KARTHIKL (L)Common Stock39USD 194.70USD 7,593SEC 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 · —
TickerDGX
CIK0001022079
SectorHealthcare
IndustryDiagnostics & Research Yahoo Finance
SEC SIC8071 Services-Medical Laboratories
ExchangeNYSE

Data coverage

Local Form 4 history719 transaction lines from 2020-01-02 to 2026-09-01
0 P purchase lines · 190 S sale lines · 529 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.