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

AEHR TEST SYSTEMS

AEHR · Nasdaq · CIK 0001040470 · Technology · Semiconductor Equipment & Materials

INSIDER SIGNAL

No active buy signal

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

133 Form 4 transaction lines observed in the same window
30 sales · 103 option, withholding, award, gift or other lines

Last qualifying purchase2024-08-02 · SLAYEN HOWARD T · $310.0K

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
ENGINEER ADILChief Operating Officer
○○▼○○○○○
SPORCK ALISTAIR NVP Contactor Business Unit
○○▼▼○○○○
ROGERS VERNONExec VP of Sales & Mktg.
○▼▼○○○○
Erickson GaynPresident and CEO
○▼○○○○
Siu ChrisCFO
○○○○○
SALAMONE ALBERTOEVP, PPBI BUSINESS
○▼○○○
● 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: 2024-08-02 · SLAYEN HOWARD T.

Recent Form 4 activity

0Purchases
73Sales
172Other Form 4 lines
168SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING30 sale line(s) · context only
OTHER103 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 provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+36.9%
3M
+56.0%
6M
+100.2%
12M
+223.7%

Volatility & liquidity

Volatility
114.7%
Beta
3.48
Avg daily value
USD 293.4M

Valuation

Market cap
USD 3.4B
P/E
—

Fundamentals

Profit margin
-14.3%
ROE
-3.2%
Industry
Semiconductor Equipment & Materials

Market data

Price data up to: 2026-10-05 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2026-05-29 · From Yahoo Finance: Market cap · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
5,220,478
Previous report
5,118,430
Avg daily volume
2,158,827
Days to cover
2.4

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
2024-08-02SLAYEN HOWARD TPurchase (P)Common Stock20,000USD 15.50USD 310,000SEC filing ↗
2024-07-19Ray-Chaudhuri Avijit K.Purchase (P)Common Stock2,591USD 18.55USD 48,063SEC filing ↗
2024-07-18Ray-Chaudhuri Avijit K.Purchase (P)Common Stock2,450USD 20.32USD 49,784SEC filing ↗
2024-01-12Ray-Chaudhuri Avijit K.Purchase (P)Common Stock3,000USD 17.87USD 53,610SEC filing ↗
2023-10-11SLAYEN HOWARD TPurchase (P)Common Stock700USD 40.20USD 28,140SEC filing ↗

Form 4 evidence

245 transaction lines in the latest 365-day window; 998 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12Siu ChrisTax withholding (F)Common Stock987USD 84.64USD 83,540SEC filing ↗
2026-10-12SPORCK ALISTAIR NTax withholding (F)Common Stock295USD 84.64USD 24,969SEC filing ↗
2026-10-12ROGERS VERNONTax withholding (F)Common Stock426USD 84.64USD 36,057SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-12Siu ChrisTax withholding (F)Common Stock987USD 84.64USD 83,540SEC filing ↗
2026-10-12SPORCK ALISTAIR NTax withholding (F)Common Stock295USD 84.64USD 24,969SEC filing ↗
2026-10-12ROGERS VERNONTax withholding (F)Common Stock426USD 84.64USD 36,057SEC filing ↗
2026-10-12RICHMOND DONALD P. IITax withholding (F)Common Stock388USD 84.64USD 32,840SEC filing ↗
2026-10-12Erickson GaynTax withholding (F)Common Stock2,675USD 84.64USD 226,412SEC filing ↗
2026-10-12ENGINEER ADILTax withholding (F)Common Stock547USD 84.64USD 46,298SEC filing ↗
2026-10-02Siu ChrisTax withholding (F)Common Stock1,164USD 107.21USD 124,792SEC filing ↗
2026-10-02SPORCK ALISTAIR NTax withholding (F)Common Stock345USD 107.21USD 36,987SEC filing ↗
2026-10-02SALAMONE ALBERTOTax withholding (F)Common Stock556USD 107.21USD 59,609SEC filing ↗
2026-10-02ROGERS VERNONTax withholding (F)Common Stock476USD 107.21USD 51,032SEC filing ↗
2026-10-02RICHMOND DONALD P. IITax withholding (F)Common Stock439USD 107.21USD 47,065SEC filing ↗
2026-10-02Erickson GaynTax withholding (F)Common Stock3,239USD 107.21USD 347,253SEC filing ↗
2026-10-02ENGINEER ADILTax withholding (F)Common Stock620USD 107.21USD 66,470SEC filing ↗
2026-10-01WIMMERS DIDIERJ (J)Common Stock1,311USD 6.67USD 8,748SEC filing ↗
2026-10-01WIMMERS DIDIERTax withholding (F)Common Stock54USD 101.60USD 5,486SEC filing ↗
2026-10-01SPORCK ALISTAIR NJ (J)Common Stock1,221USD 6.67USD 8,147SEC filing ↗
2026-10-01SPORCK ALISTAIR NTax withholding (F)Common Stock54USD 101.60USD 5,486SEC filing ↗
2026-10-01SALAMONE ALBERTOJ (J)Common Stock1,512USD 6.67USD 10,089SEC filing ↗
2026-10-01SALAMONE ALBERTOTax withholding (F)Common Stock45USD 101.60USD 4,572SEC filing ↗
2026-10-01ROGERS VERNONJ (J)Common Stock1,626USD 6.67USD 10,849SEC filing ↗
2026-10-01ROGERS VERNONTax withholding (F)Common Stock77USD 101.60USD 7,823SEC filing ↗
2026-10-01RICHMOND DONALD P. IIJ (J)Common Stock1,064USD 6.67USD 7,100SEC filing ↗
2026-10-01RICHMOND DONALD P. IITax withholding (F)Common Stock76USD 101.60USD 7,722SEC filing ↗
2026-10-01Erickson GaynJ (J)Common Stock1,053USD 6.67USD 7,026SEC filing ↗
2026-10-01Erickson GaynTax withholding (F)Common Stock499USD 101.60USD 50,698SEC filing ↗
2026-10-01ENGINEER ADILJ (J)Common Stock730USD 6.67USD 4,871SEC filing ↗
2026-10-01ENGINEER ADILTax withholding (F)Common Stock98USD 101.60USD 9,957SEC filing ↗
2026-10-01Siu ChrisJ (J)Common Stock1,089USD 6.67USD 7,266SEC filing ↗
2026-10-01Siu ChrisTax withholding (F)Common Stock194USD 101.60USD 19,710SEC filing ↗
2026-09-03WIMMERS DIDIERTax withholding (F)Common Stock317USD 76.27USD 24,178SEC 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 · —
TickerAEHR
CIK0001040470
SectorTechnology
IndustrySemiconductor Equipment & Materials Yahoo Finance
SEC SIC3825 Instruments For Meas & Testing of Electricity & Elec Signals
ExchangeNasdaq

Data coverage

Local Form 4 history998 transaction lines from 2020-01-14 to 2026-10-12
5 P purchase lines · 231 S sale lines · 762 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.