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

GRAIL, Inc.

GRAL · Nasdaq · CIK 0001699031 · Healthcare · Diagnostics & Research

INSIDER SIGNAL

No active buy signal

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

35 Form 4 transaction lines observed in the same window
22 sales · 13 option, withholding, award, gift or other lines

Last qualifying purchase2024-10-09 · DING CHUN R · $209.3K

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
Ofman Joshua J.Chief Executive Officer
○○▼○▼▼
SUMME GREGORY LDirector
○○○
MIZELL STEVENDirector
○○○
CHASE WILLIAM JDirector
○○○
Freidin AaronChief Financial Officer
▼▼▼
Partridge Andrew JohnChief Growth Officer
▼▼
● 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: 2024-10-09 · DING CHUN R.

Recent Form 4 activity

0Purchases
48Sales
21Other Form 4 lines
39SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING22 sale line(s) · context only
OTHER13 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
8,009,746
Previous report
8,565,314
Avg daily volume
1,933,327
Days to cover
4.1

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
2024-10-09DING CHUN RPurchase (P)Common Stock16,200USD 12.92USD 209,304SEC filing ↗
2024-10-03DING CHUN RPurchase (P)Common Stock35,000USD 12.71USD 444,850SEC filing ↗
2024-10-02DING CHUN RPurchase (P)Common Stock20,000USD 13.37USD 267,400SEC filing ↗
2024-10-01DING CHUN RPurchase (P)Common Stock7,629USD 13.52USD 103,144SEC filing ↗

Form 4 evidence

69 transaction lines in the latest 365-day window; 142 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15SUMME GREGORY LAward / grant (A)Common Stock237USD 135.46USD 32,104SEC filing ↗
2026-10-15Ofman Joshua J.Sale (S)Common Stock20,000USD 136.85USD 2,736,945SEC filing ↗
2026-10-15MIZELL STEVENAward / grant (A)Common Stock148USD 135.46USD 20,048SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15SUMME GREGORY LAward / grant (A)Common Stock237USD 135.46USD 32,104SEC filing ↗
2026-10-15Ofman Joshua J.Sale (S)Common Stock20,000USD 136.85USD 2,736,945SEC filing ↗
2026-10-15MIZELL STEVENAward / grant (A)Common Stock148USD 135.46USD 20,048SEC filing ↗
2026-10-15CHASE WILLIAM JAward / grant (A)Common Stock153USD 135.46USD 20,725SEC filing ↗
2026-10-05Partridge Andrew JohnSale (S)Common Stock7,873USD 146.39USD 1,152,528SEC filing ↗
2026-10-05Freidin AaronSale (S)Common Stock23,619USD 146.39USD 3,457,585SEC filing ↗
2026-09-21Ofman Joshua J.Sale (S)Common Stock61,452USD 97.74USD 6,006,281SEC filing ↗
2026-09-21Ofman Joshua J.Option exercise / conversion (M)Common Stock26,452USD 14.00USD 370,328SEC filing ↗
2026-09-21Freidin AaronSale (S)Common Stock4,100USD 93.34USD 382,682SEC filing ↗
2026-08-27Ofman Joshua J.Sale (S)Common Stock5,000USD 85.02USD 425,100SEC filing ↗
2026-08-27Freidin AaronSale (S)Common Stock7,900USD 85.01USD 671,579SEC filing ↗
2026-07-15SUMME GREGORY LAward / grant (A)Common Stock427USD 74.36USD 31,752SEC filing ↗
2026-07-15MIZELL STEVENAward / grant (A)Common Stock268USD 74.36USD 19,928SEC filing ↗
2026-07-15CHASE WILLIAM JAward / grant (A)Common Stock276USD 74.36USD 20,523SEC filing ↗
2026-06-18SUMME GREGORY LAward / grant (A)Common Stock5,491USD 63.74USD 349,996SEC filing ↗
2026-06-18MIZELL STEVENAward / grant (A)Common Stock5,491USD 63.74USD 349,996SEC filing ↗
2026-06-18Krevans SarahAward / grant (A)Common Stock5,491USD 63.74USD 349,996SEC filing ↗
2026-06-18CHASE WILLIAM JAward / grant (A)Common Stock5,491USD 63.74USD 349,996SEC filing ↗
2026-06-04Partridge Andrew JohnSale (S)Common Stock1,491USD 61.08USD 91,070SEC filing ↗
2026-06-03Ofman Joshua J.Award / grant (A)Common Stock3,154USD 61.13USD 192,804SEC filing ↗
2026-06-01Ofman Joshua J.Award / grant (A)Common Stock27,901USD 64.40USD 1,796,824SEC filing ↗
2026-04-15SUMME GREGORY LAward / grant (A)Common Stock631USD 49.79USD 31,417SEC filing ↗
2026-04-15MIZELL STEVENAward / grant (A)Common Stock396USD 49.79USD 19,717SEC filing ↗
2026-04-15CHASE WILLIAM JAward / grant (A)Common Stock408USD 49.79USD 20,314SEC filing ↗
2026-04-08RAGUSA ROBERT PSale (S)Common Stock123,502USD 49.92USD 6,165,220SEC filing ↗
2026-04-08Ofman Joshua J.Sale (S)Common Stock61,665USD 49.92USD 3,078,317SEC filing ↗
2026-04-08Freidin AaronSale (S)Common Stock45,806USD 49.92USD 2,286,636SEC filing ↗
2026-03-09RAGUSA ROBERT PSale (S)Common Stock7,461USD 47.89USD 357,296SEC filing ↗
2026-03-09Ofman Joshua J.Sale (S)Common Stock2,937USD 47.89USD 140,650SEC filing ↗
2026-03-09Freidin AaronSale (S)Common Stock2,492USD 47.89USD 119,340SEC 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 · —
TickerGRAL
CIK0001699031
SectorHealthcare
IndustryDiagnostics & Research Yahoo Finance
SEC SIC8071 Services-Medical Laboratories
ExchangeNasdaq

Data coverage

Local Form 4 history142 transaction lines from 2024-06-24 to 2026-10-15
4 P purchase lines · 77 S sale lines · 61 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.