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

DIODES INC /DEL/

DIOD · Nasdaq · CIK 0000029002 · Technology · Semiconductors

INSIDER SIGNAL

No active buy signal

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

26 Form 4 transaction lines observed in the same window
16 sales · 10 option, withholding, award, gift or other lines

Last qualifying purchase2022-04-14 · Tang Francis · $140.0K

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
Tang FrancisChief Technology Officer
▼▼▼▼
Yu GaryPresident and CEO
○○○▼
Yang EmilySVP Worldwide Sales/Marketing
▼▼▼▼
Zhao JinPresident, Diodes Asia
▼▼
Tsong AndySVP Worldwide Products Group
▼▼
White Richard DallasCorporate Secretary
▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 8 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: 2022-04-14 · Tang Francis.

Recent Form 4 activity

0Purchases
29Sales
29Other Form 4 lines
36SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING16 sale line(s) · context only
OTHER10 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
+10.6%
3M
+0.1%
6M
+39.8%
12M
—

Volatility & liquidity

Volatility
67.1%
Beta
1.90
Avg daily value
USD 54.6M

Valuation

Market cap
USD 4.4B
P/E
51.8×

Fundamentals

Profit margin
4.5%
ROE
3.5%
Industry
Semiconductors

Market data

Price data up to: 2026-10-01 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap, P/E · Status: PASS

Short interest

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

Shares short
2,531,495
Previous report
2,386,213
Avg daily volume
515,129
Days to cover
4.9

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
2022-04-14Tang FrancisPurchase (P)Diodes Incorporated Common Stock2,000USD 70.00USD 140,000SEC filing ↗

Form 4 evidence

58 transaction lines in the latest 365-day window; 842 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-12Yu EvanAward / grant (A)Diodes Incorporated Common Stock2,250USD 0.00USD 0SEC filing ↗
2026-05-29White Richard DallasSale (S)Diodes Incorporated Common Stock3,000USD 106.17USD 318,500SEC filing ↗
2026-05-29Tang FrancisSale (S)Diodes Incorporated Common Stock15,330USD 112.04USD 1,717,573SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-12Yu EvanAward / grant (A)Diodes Incorporated Common Stock2,250USD 0.00USD 0SEC filing ↗
2026-05-29White Richard DallasSale (S)Diodes Incorporated Common Stock3,000USD 106.17USD 318,500SEC filing ↗
2026-05-29Tang FrancisSale (S)Diodes Incorporated Common Stock15,330USD 112.04USD 1,717,573SEC filing ↗
2026-05-27Yu GarySale (S)Diodes Incorporated Common Stock3,632USD 110.08USD 399,811SEC filing ↗
2026-05-27Yang EmilySale (S)Diodes Incorporated Common Stock3,000USD 110.08USD 330,240SEC filing ↗
2026-05-27Tang FrancisSale (S)Diodes Incorporated Common Stock5,000USD 110.08USD 550,400SEC filing ↗
2026-05-26LU KEH SHEWTax withholding (F)Diodes Incorporated Common Stock1,970USD 108.24USD 213,233SEC filing ↗
2026-05-26Zhao JinSale (S)Diodes Incorporated Common Stock3,689USD 106.86USD 394,207SEC filing ↗
2026-05-26Yu GaryTax withholding (F)Diodes Incorporated Common Stock592USD 108.24USD 64,078SEC filing ↗
2026-05-26Yang EmilySale (S)Diodes Incorporated Common Stock2,000USD 107.52USD 215,040SEC filing ↗
2026-05-26Tsong AndySale (S)Diodes Incorporated Common Stock1,582USD 106.96USD 169,211SEC filing ↗
2026-05-26Tang FrancisSale (S)Diodes Incorporated Common Stock4,137USD 108.00USD 446,796SEC filing ↗
2026-05-20Yang EmilySale (S)Diodes Incorporated Common Stock2,000USD 96.81USD 193,620SEC filing ↗
2026-05-19Yu GaryGift (G)Diodes Incorporated Common Stock300USD 0.00USD 0SEC filing ↗
2026-05-15Yang EmilySale (S)Diodes Incorporated Common Stock2,000USD 101.47USD 202,940SEC filing ↗
2026-05-13Whitmire Brett RSale (S)Diodes Incorporated Common Stock16,556USD 103.34USD 1,710,897SEC filing ↗
2026-05-12Zhao JinSale (S)Diodes Incorporated Common Stock2,760USD 102.36USD 282,514SEC filing ↗
2026-05-12Tsong AndySale (S)Diodes Incorporated Common Stock2,652USD 110.00USD 291,720SEC filing ↗
2026-05-12Tang FrancisSale (S)Diodes Incorporated Common Stock3,643USD 108.00USD 393,444SEC filing ↗
2026-05-11Yu GaryAward / grant (A)Diodes Incorporated Common Stock3,000USD 0.00USD 0SEC filing ↗
2026-05-11Su Huey-Jen JennyAward / grant (A)Diodes Incorporated Common Stock3,000USD 0.00USD 0SEC filing ↗
2026-05-11RITTER PHILIP JAward / grant (A)Diodes Incorporated Common Stock3,000USD 0.00USD 0SEC filing ↗
2026-05-11Chen WarrenAward / grant (A)Diodes Incorporated Common Stock3,000USD 0.00USD 0SEC filing ↗
2026-05-11Chen Button AngieAward / grant (A)Diodes Incorporated Common Stock6,000USD 0.00USD 0SEC filing ↗
2026-05-11Bull ElizabethAward / grant (A)Diodes Incorporated Common Stock3,000USD 0.00USD 0SEC filing ↗
2026-02-24Yu GarySale (S)Diodes Incorporated Common Stock2,000USD 70.00USD 140,000SEC filing ↗
2026-02-24Yang EmilySale (S)Diodes Incorporated Common Stock2,154USD 69.89USD 150,543SEC filing ↗
2026-02-20LU KEH SHEWSale (S)Diodes Incorporated Common Stock111,000USD 67.76USD 7,521,009SEC filing ↗
2026-02-13Yang EmilySale (S)Diodes Incorporated Common Stock1,000USD 71.89USD 71,890SEC filing ↗
2026-02-13Whitmire Brett RSale (S)Diodes Incorporated Common Stock5,953USD 71.22USD 423,973SEC 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 · —
TickerDIOD
CIK0000029002
SectorTechnology
IndustrySemiconductors Yahoo Finance
SEC SIC3674 Semiconductors & Related Devices
ExchangeNasdaq

Data coverage

Local Form 4 history842 transaction lines from 2020-01-02 to 2026-08-12
1 P purchase lines · 434 S sale lines · 407 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.