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

ALPHA & OMEGA SEMICONDUCTOR Ltd

AOSL · Nasdaq · CIK 0001387467 · Technology · Semiconductors

INSIDER SIGNAL

No active buy signal

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

16 Form 4 transaction lines observed in the same window
5 sales · 11 option, withholding, award, gift or other lines

Last qualifying purchase2026-03-09 · Chang Mike F · $640.8K

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
Chang Mike FDirector,TenPercentOwner
○○○○○○
Xue BingEVP-WW Sales & Bus Development
▼▼▼
Chang Stephen ChunpingChief Executive Officer
○○
Liang YifanCFO and Corp Secretary
○○
Chen ClaudiaDirector
▼
Chien Joshua C.Director
○
● Purchase▼ Sale○ Other

—

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: 2026-03-09 · Chang Mike F.

Recent Form 4 activity

1Purchases
19Sales
45Other Form 4 lines
45SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING5 sale line(s) · context only
OTHER11 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
+22.8%
3M
-20.9%
6M
+33.2%
12M
—

Volatility & liquidity

Volatility
88.8%
Beta
—
Avg daily value
—

Valuation

Market cap
—
P/E
—

Fundamentals

Profit margin
-6.2%
ROE
-5.3%
Industry
Semiconductors

Market data

Price data up to: 2026-10-03 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2026-06-30 · Status: PASS

Short interest

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

Shares short
2,947,504
Previous report
2,922,868
Avg daily volume
594,759
Days to cover
5.0

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
2026-03-09Chang Mike FPurchase (P)Common Shares33,727USD 19.00USD 640,813SEC filing ↗

Form 4 evidence

65 transaction lines in the latest 365-day window; 389 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-24Chang Stephen ChunpingGift (G)Common Share100,947USD 0.00USD 0SEC filing ↗
2026-08-24Chang Mike FGift (G)Common Shares100,947USD 0.00USD 0SEC filing ↗
2026-08-13Chang Mike FGift (G)Common Shares3,000,000USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-24Chang Stephen ChunpingGift (G)Common Share100,947USD 0.00USD 0SEC filing ↗
2026-08-24Chang Mike FGift (G)Common Shares100,947USD 0.00USD 0SEC filing ↗
2026-08-13Chang Mike FGift (G)Common Shares3,000,000USD 0.00USD 0SEC filing ↗
2026-07-20Chien Joshua C.Award / grant (A)Common Share1,368USD 0.00USD 0SEC filing ↗
2026-07-16Xue BingSale (S)Common Share875USD 33.99USD 29,741SEC filing ↗
2026-07-13Chang Mike FGift (G)Common Shares23,754USD 0.00USD 0SEC filing ↗
2026-06-16Xue BingSale (S)Common Share4,916USD 47.09USD 231,494SEC filing ↗
2026-06-01Chang Mike FGift (G)Common Shares30,000USD 0.00USD 0SEC filing ↗
2026-05-26Chang Mike FGift (G)Common Shares39,780USD 0.00USD 0SEC filing ↗
2026-05-22Chang Mike FGift (G)Common Shares736,252USD 0.00USD 0SEC filing ↗
2026-05-22Chen ClaudiaSale (S)Common Share4,061USD 39.53USD 160,520SEC filing ↗
2026-05-21Chang Stephen ChunpingGift (G)Common Share2,000USD 0.00USD 0SEC filing ↗
2026-05-18Xue BingSale (S)Common Share4,916USD 41.00USD 201,556SEC filing ↗
2026-04-28Liang YifanGift (G)Common Shares300USD 0.00USD 0SEC filing ↗
2026-04-27Liang YifanGift (G)Common Shares300USD 0.00USD 0SEC filing ↗
2026-04-17Liang YifanSale (S)Common Shares8,625USD 35.00USD 301,875SEC filing ↗
2026-04-17Chang Stephen ChunpingSale (S)Common Share14,884USD 34.47USD 512,987SEC filing ↗
2026-04-16Xue BingSale (S)Common Share1,832USD 31.21USD 57,177SEC filing ↗
2026-04-14Liang YifanSale (S)Common Shares26,517USD 30.57USD 810,493SEC filing ↗
2026-04-14Chang Stephen ChunpingSale (S)Common Share5,594USD 31.90USD 178,449SEC filing ↗
2026-03-16Li WenjunTax withholding (F)Common Share5,607USD 21.43USD 120,158SEC filing ↗
2026-03-16Li WenjunAward / grant (A)Common Share10,000USD 0.00USD 0SEC filing ↗
2026-03-16Chang Mike FTax withholding (F)Common Shares14,419USD 21.43USD 308,999SEC filing ↗
2026-03-16Chang Mike FAward / grant (A)Common Shares22,500USD 0.00USD 0SEC filing ↗
2026-03-16Xue BingSale (S)Common Share2,408USD 21.92USD 52,783SEC filing ↗
2026-03-16Xue BingTax withholding (F)Common Share9,182USD 21.43USD 196,770SEC filing ↗
2026-03-16Xue BingAward / grant (A)Common Share15,000USD 0.00USD 0SEC filing ↗
2026-03-16Liang YifanTax withholding (F)Common Shares11,499USD 21.43USD 246,424SEC filing ↗
2026-03-16Liang YifanAward / grant (A)Common Shares22,500USD 0.00USD 0SEC filing ↗
2026-03-16Li WenjunTax withholding (F)Common Share5,539USD 21.43USD 118,701SEC 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 · —
TickerAOSL
CIK0001387467
SectorTechnology
IndustrySemiconductors Yahoo Finance
SEC SIC3674 Semiconductors & Related Devices
ExchangeNasdaq

Data coverage

Local Form 4 history389 transaction lines from 2020-03-16 to 2026-08-24
1 P purchase lines · 116 S sale lines · 272 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.