FolioLanternBeta
DIODDiodes Inc · Insider ownership research

Diodes Inc insiders sold $16.8M in the past 12 months. How much of their stake is that?

0% was sold under disclosed trading plans, 100% with no plan disclosed. The largest seller, Keh Lu (CEO, Director), sold $7.8M.Share-of-stake figures for this company are being verified and will be added when that check is finished. Why

Updated Oct 16, 2026 from SEC filings · covers Oct 17, 2025 to Oct 16, 2026
$16.8M
sold with no plan disclosed, past 12 months
0%
of sales were under disclosed trading plans, past 12 months
8 of 15
officers and directors sold shares, past 12 months
Is this normal? Less than usual: about two-thirds of the 5-year average. 8 insiders sold; the average is 8 a year. Year by year
Latest filing: Filed Aug 13 for a stock award on Aug 12. Evan Yu received an award of 2.2K shares. Filing
SEC ownership filings: 38 filed in the 12 months to Oct 16, 2026; 1,182 on record since Oct 7, 2002 · See the evidence

What stands out

Four officers sold $14.3M with no disclosed plan: Keh Lu ($7.8M), Francis Tang ($3.1M) and Brett Whitmire ($2.2M), plus 1 more. The filings don't state a reason.Keh Lu: largest such sale, Feb 20, 2026 · Francis Tang: largest such sale, May 29, 2026 · Brett Whitmire: largest such sale, May 13, 2026

A share of stake is shown for 0 of the 8 officers and directors who sold. 15 are left out

i
Left out: Keh Lu, Francis Tang, Gary Yu, Emily Yang, Brett Whitmire, Richard White, Andy Tsong, Jin Zhao, Button Chen, Evan Yu, Warren Chen, Elizabeth Bull, Robert Feiger, Huey-Jen Su and Philip Ritter (share of stake is being verified).
Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.

Keh Lu
CEO, Director
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$7.8MNo plan disclosed
Francis Tang
Chief Technology Officer
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$3.1MNo plan disclosed
Brett Whitmire
CFO
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$2.2MNo plan disclosed
Emily Yang
SVP Worldwide Sales/Marketing
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$1.2MNo plan disclosed
Gary Yu
President and CEO, Director
Not confirmed
Share of stake not shown: share of stake is being verified. Why
$716KNo plan disclosed
All 8 sellers

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

No plan disclosedOne dollar scale for every month; the tallest bar is labeled
OctNov 2025: $285K no plan disclosedNovDecJanFeb 2026: $8.9M no plan disclosed$8.9MFebMarAprMay 2026: $7.6M no plan disclosedMayJunJulAugSepOct

Recent activity

Past 30 days, Sep 17, 2026 to Oct 16, 2026

No officer or director trades were reported for the past 30 days. The most recent before that:

May 29, 20262 executives sold 18K shares ($2.0M) with no plan disclosed.
WhoSharesPrice% of total stakeTotal stake afterTrade dateFiled
Francis Tang
Chief Technology Officer
15,330$112.04n/an/aMay 29, 2026Jun 1, 2026
Richard White
Corporate Secretary
3,000$106.17n/an/aMay 29, 2026Jun 1, 2026

Outside holders, reported separately

Keh Lu reported no open-market sales in the past 12 months. Large shareholders and the funds or companies that board members represent are not part of management, so they are left out of the figures above.

Details

Common questions

Is the Diodes Inc CEO selling stock?

Yes. Keh Lu sold 117K shares ($7.8M) in the past 12 months, none of it under a trading plan disclosed in the filings.

Why are Diodes Inc insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.

Are any Diodes Inc insiders buying?

No. Officers and directors reported no purchases in the past 12 months.

The evidence

Who sold8 officers and directors: amount, % of holdings, trading plan
Who soldAmount% of holdingsTrading plan
Keh Lu
CEO, Director
$7.8M
117K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Francis Tang
Chief Technology Officer
$3.1M
28K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Brett Whitmire
CFO
$2.2M
23K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Emily Yang
SVP Worldwide Sales/Marketing
$1.2M
13K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Gary Yu
President and CEO, Director
$716K
8.5K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Jin Zhao
President, Diodes Asia
$708K
7K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Andy Tsong
SVP Worldwide Products Group
$692K
7.5K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed
Richard White
Corporate Secretary
$319K
3K shares
Not confirmed
share of stake is being verified. Why
No plan disclosed

Sold by a charitable foundation the insider reports: Lu Family Foundation, reported by Keh Lu. A foundation's shares are not the insider's own stake, so they are left out of the figures above.

The full ownership picture0 of 15 officers and directors confirmed

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

InsiderHeld Oct 16, 2025SoldHeld Oct 16, 2026Still held
Keh Lu
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Keh Lu are complete.
CEO, Director
n/a−117Kn/an/a
Vesting, gifts, unvested awards and holding lines for Keh Lu

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Keh Lu are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−14Kwithheld by the company for taxes
Francis Tang
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Francis Tang are complete.
Chief Technology Officer
n/a−28Kn/an/a
Vesting, gifts, unvested awards and holding lines for Francis Tang

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Francis Tang are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−2.1Kwithheld by the company for taxes
Gary Yu
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Gary Yu are complete.
President and CEO, Director
n/a−8.5Kn/an/a
Vesting, gifts, unvested awards and holding lines for Gary Yu

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Gary Yu are complete; balances and unit counts will be added when the check is finished.

−300gifted (net of own trusts)
−1.9Kwithheld by the company for taxes
Emily Yang
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Emily Yang are complete.
SVP Worldwide Sales/Marketing
n/a−13Kn/an/a
Vesting, gifts, unvested awards and holding lines for Emily Yang

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Emily Yang are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−2.5Kwithheld by the company for taxes
Brett Whitmire
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Brett Whitmire are complete.
CFO
n/a−23Kn/an/a
Vesting, gifts, unvested awards and holding lines for Brett Whitmire

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Brett Whitmire are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−2.8Kwithheld by the company for taxes
Richard White
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Richard White are complete.
Corporate Secretary
n/a−3Kn/an/a
Vesting, gifts, unvested awards and holding lines for Richard White

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Richard White are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Andy Tsong
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Andy Tsong are complete.
SVP Worldwide Products Group
n/a−7.5Kn/an/a
Vesting, gifts, unvested awards and holding lines for Andy Tsong

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Andy Tsong are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−1.5Kwithheld by the company for taxes
Jin Zhao
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jin Zhao are complete.
President, Diodes Asia
n/a−7Kn/an/a
Vesting, gifts, unvested awards and holding lines for Jin Zhao

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jin Zhao are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
−1.8Kwithheld by the company for taxes
Button Chen
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Button Chen are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Button Chen

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Button Chen are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Evan Yu
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Evan Yu are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Evan Yu

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Evan Yu are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Warren Chen
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Warren Chen are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Warren Chen

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Warren Chen are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Elizabeth Bull
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Elizabeth Bull are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Elizabeth Bull

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Elizabeth Bull are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Robert Feiger
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Robert Feiger are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Robert Feiger

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Robert Feiger are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Huey-Jen Su
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Huey-Jen Su are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Huey-Jen Su

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Huey-Jen Su are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)
Philip Ritter
!
Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Philip Ritter are complete.
Director
n/a0n/an/a
Vesting, gifts, unvested awards and holding lines for Philip Ritter

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Philip Ritter are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Holdings and share of stake for Diodes Inc are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

What explains the selling$16.8M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $16.8M across 207,570 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

No plan disclosed · $16.8M

Sales with no 10b5-1 plan and no tax reference in the filing. $7.8M of it is Keh Lu. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Keh Lu, Feb 20, 2026

Taxes

27,010 shares ($1.8M) were withheld by the company for taxes, which isn't a market sale.

SellerShares soldProceedsUnder a disclosed planShare of totalSales dates
Keh Lu
CEO, Director
117K$7.8M0%47%Nov 12, 2025 to Feb 20, 2026
Francis Tang
Chief Technology Officer
28K$3.1M0%19%May 12, 2026 to May 29, 2026
Brett Whitmire
CFO
23K$2.2M0%13%Feb 3, 2026 to May 13, 2026
Emily Yang
SVP Worldwide Sales/Marketing
13K$1.2M0%7%Feb 3, 2026 to May 27, 2026
Gary Yu
President and CEO, Director
8.5K$716K0%4%Feb 3, 2026 to May 27, 2026
Jin Zhao
President, Diodes Asia
7K$708K0%4%Feb 2, 2026 to May 26, 2026
Andy Tsong
SVP Worldwide Products Group
7.5K$692K0%4%Feb 13, 2026 to May 26, 2026
Richard White
Corporate Secretary
3K$319K0%2%May 29, 2026 to May 29, 2026

Sales by month

MonthSale proceedsDisclosed planTo cover taxesNo plan disclosed
Oct 2025$0$0$0$0
Nov 2025$285K$0$0$285K
Dec 2025$0$0$0$0
Jan 2026$0$0$0$0
Feb 2026$8.9M$0$0$8.9M
Mar 2026$0$0$0$0
Apr 2026$0$0$0$0
May 2026$7.6M$0$0$7.6M
Jun 2026$0$0$0$0
Jul 2026$0$0$0$0
Aug 2026$0$0$0$0
Sep 2026$0$0$0$0
Oct 2026$0$0$0$0
Is this normal? Selling year by year5 earlier years to compare with

Less than usual: about two-thirds of the 5-year average. 8 insiders sold; the average is 8 a year.

12 months endingShares soldInsiders who soldProceeds
Oct 16, 2026
Latest 12 months
208K8$16.8M
Oct 16, 2025
1 year earlier
8.7K3$484K
Oct 16, 2024
2 years earlier
109K7$7.7M
Oct 17, 2023
3 years earlier
187K11$17.1M
Oct 17, 2022
4 years earlier
212K9$21.6M
Oct 17, 2021
5 years earlier
1.06M9$84.0M

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertainty15 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Diodes Inc are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology1,182 filings on record, 38 filed in the 12-month period, and how we read them

All 1,182 Forms 3, 4 and 5 on record for Diodes Inc (SEC CIK 29002), filed from Oct 7, 2002 to Aug 13, 2026; 38 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages. 20 older filings exist only on paper and could not be read.

Probable 3-for-2 stock split on or before Dec 8, 2003 (first filing that shows post-split balances). Splits aren't reported as transactions; 4 holding lines changed by exactly this ratio, so earlier share counts are restated.

Probable 3-for-2 stock split on or before Feb 9, 2006 (first filing that shows post-split balances). Splits aren't reported as transactions; 2 holding lines changed by exactly this ratio, so earlier share counts are restated.

Probable 3-for-2 stock split on or before Aug 9, 2007 (first filing that shows post-split balances). Splits aren't reported as transactions; 6 holding lines changed by exactly this ratio, so earlier share counts are restated.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (23)No filing in 18 months; last reported balances, not in any total
NameLast filedLast reported balance
Wen-Chi SungJun 3, 202427,240 shares, last reported balance as of May 30, 2024
Peter MenardMay 30, 202418,050 shares, last reported balance as of May 29, 2024
Julie HollandFeb 5, 202474,558 shares, last reported balance as of Feb 2, 2024
Michael GiordanoMay 26, 2023488,074 shares, last reported balance as of May 24, 2023
Michael TsaiMay 31, 202250,265 shares, last reported balance as of May 26, 2022
CHEN C HNov 22, 2021545,583 shares, last reported balance as of Nov 19, 2021
Raymond SoongAug 26, 2020572,575 shares, last reported balance as of Aug 25, 2020
Clemente BeltranMay 30, 201927,378 shares, last reported balance as of May 28, 2019
Mark KingDec 6, 2017148,497 shares, last reported balance as of Nov 21, 2017
LITE-ON SEMICONDUCTOR CorpNov 30, 20177,765,778 shares, last reported balance as of Nov 30, 2017
Shiao TangOct 10, 2017134,876 shares, last reported balance as of Oct 10, 2017
John StichMay 18, 2017121,762 shares, last reported balance as of May 16, 2017
Lu-Pao HsuMay 27, 201669,400 shares, last reported balance as of May 26, 2016
Alex HuiMar 22, 201628,777 shares, last reported balance as of Mar 21, 2016
Joseph LiuJul 6, 2015513,574 shares, last reported balance as of Jul 2, 2015
Chieh ChangJul 7, 201415,986 shares, last reported balance as of Jul 2, 2014
Colin GreeneAug 22, 201323,950 shares, last reported balance as of Aug 20, 2013
Carl WertzJun 11, 201042,896 shares, last reported balance as of Jun 10, 2010
Shing MaoMar 3, 2010240,625 shares, last reported balance as of Mar 2, 2010
Tung LeeJun 1, 200948,375 shares, last reported balance as of May 28, 2009
Hans RohrerJul 30, 2008No balance on record
Steven HoJun 4, 200884,404 shares, last reported balance as of Jun 4, 2008
LU M KMay 24, 200678,750 shares, last reported balance as of May 22, 2006

Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.