Quick Takeaways
- DIOD - DIODES INC /DEL/ has 21 insiders with reported activity on this page.
- Net insider value flow over the last year: -$12,038,725.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 21 Insiders of DIODES INC /DEL/
- Symbol
- DIOD on Nasdaq
- Location
- Plano, TX
What Changed
- Buy value: ; sell value: $12,038,725.
- Net share flow: -166,200.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$12,038,725.
Buys
$0
Shares: 0
Insiders: 0
Sells
$12,038,725
Shares: 166,200
Insiders: 7
Net
-$12,038,725
Shares: -166,200
Insiders: -7
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 140,765 | $0 | $10,490,238 | -$10,490,238 |
| 3-6 | 0 | 15,435 | $0 | $1,042,615 | -$1,042,615 |
| 6-9 | 0 | 10,000 | $0 | $505,872 | -$505,872 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
DIODES INC /DEL/ executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Keh Shew Lu | Director | $40,308,482 | -$7,805,607 | -16% | Mixed | 20 Feb 2026 |
| Francis Tang | Chief Technology Officer | $12,104,254 | -$393,444 | -3.1% | Mixed | 12 May 2026 |
| Gary Yu | President and CEO, Director | $11,804,612 | -$316,465 | -2.6% | Mixed | 11 May 2026 |
| Yu-Shu Evan Yu | Former SVP, WW Power Products | $11,111,486 | Mixed | 21 Feb 2023 | ||
| C. H. Chen | Director | $10,008,806 | Mixed | 19 Nov 2021 | ||
| Andy Kuo-Ting Tsong | SVP Worldwide Products Group | $7,139,847 | -$522,612 | -6.8% | Mixed | 12 May 2026 |
| Emily Yang | SVP Worldwide Sales/Marketing | $6,751,198 | -$389,827 | -5.5% | Mixed | 24 Feb 2026 |
| Michael R. Giordano | Director | $6,636,241 | Mixed | 24 May 2023 | ||
| Jin Zhao | President, Diodes Asia | $6,500,608 | -$313,591 | -4.6% | Mixed | 12 May 2026 |
| Brett R. Whitmire | Cfo | $6,279,420 | -$2,297,179 | -27% | Mixed | 13 May 2026 |
| Michael Kuo-Chih Tsai | Director | $4,069,374 | Mixed | 26 May 2022 | ||
| Julie Holland | Former SVP, Corp. Operations | $3,435,853 | Mixed | 02 Feb 2024 | ||
| Richard D. White | Corporate Secretary | $3,096,844 | Mixed | 08 Mar 2024 | ||
| Angie Chen Button | Director | $2,162,368 | Mixed | 11 May 2026 | ||
| Wen-Chi Sung | Director | $1,960,190 | Mixed | 30 May 2024 | ||
| Warren Chen | Director | $1,950,430 | Mixed | 11 May 2026 | ||
| Peter M. Menard | Former Director | $1,298,878 | Filing P/S | 29 May 2024 | ||
| Elizabeth Bull | Director | $1,250,880 | Mixed | 11 May 2026 | ||
| Robert E. Feiger | Director | $450,492 | Mixed | 13 May 2025 | ||
| Huey-Jen Jenny Su | Director | $409,560 | Median | 11 May 2026 | ||
| Philip J. Ritter | Director | $204,780 | Median | 11 May 2026 |
Top shareholders of DIODES INC /DEL/ (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
|
Company |
15%
from 13D/G
|
7,198,574
|
$491,374,651 | — | 31 Mar 2026 | |
| FMR LLC |
13D/G
13F
|
Company |
12%
|
5,687,734
|
$472,480,097 | -$51,456,964 | 31 Mar 2026 | |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
|
Vanguard Portfolio Management · Company |
8%
|
3,656,577
|
$249,597,946 | $0 | 31 Mar 2026 | |
| STATE STREET CORP |
13D/G
13F
|
STATE STREET CORPORATION · Company |
5%
|
2,282,049
|
$189,569,810 | -$14,748,746 | 31 Mar 2026 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
|
Company |
5.1%
from 13D/G
|
2,436,359
|
$166,294,107 | — | 31 Mar 2026 | |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
|
Vanguard Capital Management · Company |
5.1%
|
2,333,662
|
$159,295,768 | $0 | 31 Mar 2026 | |
| MORGAN STANLEY |
13F
|
Company |
3.6%
|
1,664,526
|
$113,620,688 | — | 31 Mar 2026 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
3.1%
|
1,436,862
|
$98,095,640 | — | 31 Mar 2026 | |
| EARNEST PARTNERS LLC |
13F
|
Company |
2.2%
|
1,001,435
|
$68,357,953 | — | 31 Mar 2026 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
2%
|
931,131
|
$63,559,002 | — | 31 Mar 2026 | |
| Global Alpha Capital Management Ltd. |
13F
|
Company |
1.8%
|
837,654
|
$57,178,262 | — | 31 Mar 2026 | |
| Invesco Ltd. |
13F
|
Company |
1.8%
|
828,419
|
$56,547,881 | — | 31 Mar 2026 | |
| VICTORY CAPITAL MANAGEMENT INC |
13F
|
Company |
1.7%
|
791,636
|
$54,037,073 | — | 31 Mar 2026 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
1.7%
|
772,338
|
$52,719,792 | — | 31 Mar 2026 | |
| FRONTIER CAPITAL MANAGEMENT CO LLC |
13F
|
Company |
1.3%
|
592,499
|
$40,443,982 | — | 31 Mar 2026 | |
| Keh Shew Lu |
3/4/5
|
Director |
—
mixed-class rows
|
558,258
mixed-class rows
|
$40,308,482 | -$7,805,607 | 20 Feb 2026 | |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. |
13F
|
Company |
1.3%
|
582,236
|
$39,743,000 | — | 31 Mar 2026 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.2%
|
542,209
|
$37,011,186 | — | 31 Mar 2026 | |
| BESSEMER GROUP INC |
13F
|
Company |
0.97%
|
444,540
|
$30,346,000 | — | 31 Mar 2026 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
0.97%
|
443,123
|
$30,247,576 | — | 31 Mar 2026 | |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
0.97%
|
441,562
|
$30,141,022 | — | 31 Mar 2026 | |
| FULLER & THALER ASSET MANAGEMENT, INC. |
13F
|
Company |
0.94%
|
428,170
|
$29,226,855 | — | 31 Mar 2026 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.79%
|
360,133
|
$24,582,000 | — | 31 Mar 2026 | |
| Boston Partners |
13F
|
Company |
0.75%
|
343,031
|
$23,429,804 | — | 31 Mar 2026 | |
| Tributary Capital Management, LLC |
13F
|
Company |
0.75%
|
341,227
|
$23,292,155 | — | 31 Mar 2026 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.73%
|
333,424
|
$22,759,522 | — | 31 Mar 2026 | |
| VANGUARD FIDUCIARY TRUST CO |
13F
|
Company |
0.64%
|
294,029
|
$20,070,420 | — | 31 Mar 2026 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.62%
|
284,235
|
$19,401,893 | — | 31 Mar 2026 | |
| Allspring Global Investments Holdings, LLC |
13F
|
Company |
0.56%
|
254,167
|
$17,517,190 | — | 31 Mar 2026 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.57%
|
262,199
|
$16,867,263 | — | 31 Mar 2026 | |
| OBERWEIS ASSET MANAGEMENT INC/ |
13F
|
Company |
0.49%
|
224,300
|
$15,310,718 | — | 31 Mar 2026 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.49%
|
222,963
|
$15,219,454 | — | 31 Mar 2026 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.48%
|
221,015
|
$15,086,484 | — | 31 Mar 2026 | |
| UBS Group AG |
13F
|
Company |
0.47%
|
212,472
|
$14,503,339 | — | 31 Mar 2026 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.44%
|
202,781
|
$13,841,831 | — | 31 Mar 2026 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.41%
|
188,372
|
$12,858,273 | — | 31 Mar 2026 | |
| EMERALD ADVISERS, LLC |
13F
|
Company |
0.4%
|
181,053
|
$12,358,678 | — | 31 Mar 2026 | |
| Francis Tang |
3/4/5
|
Chief Technology Officer |
—
mixed-class rows
|
124,105
mixed-class rows
|
$12,104,254 | -$393,444 | 12 May 2026 | |
| Gary Yu |
3/4/5
|
President and CEO, Director |
—
mixed-class rows
|
188,671
mixed-class rows
|
$11,804,612 | -$316,465 | 11 May 2026 | |
| KENNEDY CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.38%
|
171,266
|
$11,690,617 | — | 31 Mar 2026 | |
| PANAGORA ASSET MANAGEMENT INC |
13F
|
Company |
0.37%
|
169,466
|
$11,567,749 | — | 31 Mar 2026 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.37%
|
166,848
|
$11,389,044 | — | 31 Mar 2026 | |
| ENVESTNET ASSET MANAGEMENT INC |
13F
|
Company |
0.36%
|
165,267
|
$11,281,098 | — | 31 Mar 2026 | |
| LAZARD ASSET MANAGEMENT LLC |
13F
|
Company |
0.36%
|
164,673
|
$11,240,579 | — | 31 Mar 2026 | |
| PUBLIC SECTOR PENSION INVESTMENT BOARD |
13F
|
Company |
0.36%
|
164,080
|
$11,200,101 | — | 31 Mar 2026 | |
| Yu-Shu Evan Yu |
3/4/5
|
Former SVP, WW Power Products |
—
mixed-class rows
|
138,892
mixed-class rows
|
$11,111,486 | — | 21 Feb 2023 | |
| Russell Investments Group, Ltd. |
13F
|
Company |
0.33%
|
149,947
|
$10,235,406 | — | 31 Mar 2026 | |
| C. H. Chen |
3/4/5
|
Director |
—
class O/S missing
|
123,629
|
$10,008,806 | — | 19 Nov 2021 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.31%
|
140,098
|
$9,563,064 | — | 31 Mar 2026 | |
| Allianz Asset Management GmbH |
13F
|
Company |
0.3%
|
138,332
|
$9,442,542 | — | 31 Mar 2026 |
Recent Insider Transactions by Companies or Individuals for DIODES INC /DEL/
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Brett R. Whitmire | DIOD | Diodes Incorporated Common Stock | Sale | -27.1% | $1,710,905 | $103.34 | -16,556 | 44,632 | 13 May 2026 | Direct |
| Jin Zhao | DIOD | Diodes Incorporated Common Stock | Sale | -5.52% | $282,516 | $102.36 | -2,760 | 47,220 | 12 May 2026 | Direct |
| Andy Kuo-Ting Tsong | DIOD | Diodes Incorporated Common Stock | Sale | -5.06% | $291,720 | $110.00 | -2,652 | 49,752 | 12 May 2026 | Direct |
| Francis Tang | DIOD | Diodes Incorporated Common Stock | Sale | -3.66% | $393,444 | $108.00 | -3,643 | 95,905 | 12 May 2026 | Direct |
| Angie Chen Button | DIOD | Diodes Incorporated Common Stock | Award | 42.7% | 6,000 | 20,040 | 11 May 2026 | Direct | ||
| Elizabeth Bull | DIOD | Diodes Incorporated Common Stock | Award | 33.3% | 3,000 | 12,000 | 11 May 2026 | Direct | ||
| Warren Chen | DIOD | Diodes Incorporated Common Stock | Award | 29.6% | 3,000 | 13,140 | 11 May 2026 | Direct | ||
| Huey-Jen Jenny Su | DIOD | Diodes Incorporated Common Stock | Award | 100% | 3,000 | 6,000 | 11 May 2026 | Direct | ||
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Award | 2.74% | 3,000 | 112,671 | 11 May 2026 | Direct | ||
| Philip J. Ritter | DIOD | Diodes Incorporated Common Stock | Award | 3,000 | 3,000 | 11 May 2026 | Direct | |||
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -2.95% | $150,551 | $69.89 | -2,154 | 70,878 | 24 Feb 2026 | Direct |
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Sale | -1.79% | $140,000 | $70.00 | -2,000 | 109,671 | 24 Feb 2026 | Direct |
| Keh Shew Lu | DIOD | Diodes Incorporated Common Stock | Sale | -26.3% | $4,353,257 | $67.74 | -64,266 | 180,131 | 20 Feb 2026 | Texastac Investments, LP |
| Keh Shew Lu | DIOD | Diodes Incorporated Common Stock | Sale | -17.2% | $3,167,846 | $67.78 | -46,734 | 225,152 | 20 Feb 2026 | Lu Grandchildren's Trust |
| Brett R. Whitmire | DIOD | Diodes Incorporated Common Stock | Sale | -8.87% | $423,979 | $71.22 | -5,953 | 61,188 | 13 Feb 2026 | Direct |
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -1.35% | $71,891 | $71.89 | -1,000 | 73,032 | 13 Feb 2026 | Direct |
| Andy Kuo-Ting Tsong | DIOD | Diodes Incorporated Common Stock | Sale | -5.89% | $230,892 | $70.46 | -3,277 | 52,404 | 13 Feb 2026 | Direct |
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Sale | -2.53% | $176,465 | $60.85 | -2,900 | 111,671 | 03 Feb 2026 | Direct |
| Brett R. Whitmire | DIOD | Diodes Incorporated Common Stock | Sale | -1.22% | $50,506 | $60.85 | -830 | 67,141 | 03 Feb 2026 | Direct |
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -1.27% | $57,808 | $60.85 | -950 | 74,032 | 03 Feb 2026 | Direct |
| Andy Kuo-Ting Tsong | DIOD | Diodes Incorporated Common Stock | Tax liability | -2.69% | -1,541 | 55,681 | 02 Feb 2026 | Direct | ||
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Tax liability | -1.16% | -1,340 | 114,571 | 02 Feb 2026 | Direct | ||
| Jin Zhao | DIOD | Diodes Incorporated Common Stock | Sale | -1.04% | $31,075 | $59.19 | -525 | 49,980 | 02 Feb 2026 | Direct |
| Jin Zhao | DIOD | Diodes Incorporated Common Stock | Tax liability | -3.53% | -1,846 | 50,505 | 02 Feb 2026 | Direct | ||
| Brett R. Whitmire | DIOD | Diodes Incorporated Common Stock | Tax liability | -3.96% | -2,806 | 67,971 | 02 Feb 2026 | Direct | ||
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Tax liability | -3.22% | -2,497 | 74,982 | 02 Feb 2026 | Direct | ||
| Francis Tang | DIOD | Diodes Incorporated Common Stock | Tax liability | -2.04% | -2,068 | 99,548 | 02 Feb 2026 | Direct | ||
| Keh Shew Lu | DIOD | Diodes Incorporated Common Stock | Tax liability | -11.8% | -12,350 | 92,275 | 02 Feb 2026 | Direct | ||
| Andy Kuo-Ting Tsong | DIOD | Diodes Incorporated Common Stock - Performance Stock Units | Award | 77.9% | 18,000 | 41,100 | 01 Feb 2026 | Direct | ||
| Andy Kuo-Ting Tsong | DIOD | Diodes Incorporated Common Stock | Award | 45.9% | 18,000 | 57,222 | 01 Feb 2026 | Direct | ||
| Gary Yu | DIOD | Diodes Incorporated Common Stock - Performance Stock Units | Award | 56.1% | 32,000 | 89,000 | 01 Feb 2026 | Direct | ||
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Award | 38.1% | 32,000 | 115,911 | 01 Feb 2026 | Direct | ||
| Jin Zhao | DIOD | Diodes Incorporated Common Stock - Performance Stock Units | Award | 77.9% | 18,000 | 41,100 | 01 Feb 2026 | Direct | ||
| Jin Zhao | DIOD | Diodes Incorporated Common Stock | Award | 50.1% | 18,000 | 53,926 | 01 Feb 2026 | Direct | ||
| Brett R. Whitmire | DIOD | Diodes Incorporated Common Stock - Performance Stock Units | Award | 95.2% | 22,000 | 45,100 | 01 Feb 2026 | Direct | ||
| Brett R. Whitmire | DIOD | Diodes Incorporated Common Stock | Award | 45.1% | 22,000 | 70,777 | 01 Feb 2026 | Direct | ||
| Emily Yang | DIOD | Diodes Incorporated Common Stock - Performance Stock Units | Award | 77.9% | 18,000 | 41,100 | 01 Feb 2026 | Direct | ||
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Award | 30.3% | 18,000 | 77,479 | 01 Feb 2026 | Direct | ||
| Francis Tang | DIOD | Diodes Incorporated Common Stock - Performance Stock Units | Award | 53.7% | 13,000 | 37,200 | 01 Feb 2026 | Direct | ||
| Francis Tang | DIOD | Diodes Incorporated Common Stock | Award | 14.7% | 13,000 | 101,616 | 01 Feb 2026 | Direct | ||
| Keh Shew Lu | DIOD | Diodes Incorporated Common Stock | Sale | -0.85% | $99,419 | $47.46 | -2,095 | 244,397 | 12 Nov 2025 | Texastac Investments, LP |
| Keh Shew Lu | DIOD | Diodes Incorporated Common Stock | Sale | -1.42% | $185,086 | $47.40 | -3,905 | 271,886 | 12 Nov 2025 | Lu Grandchildren's Trust |
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -1.65% | $56,360 | $56.36 | -1,000 | 59,479 | 28 Aug 2025 | Direct |
| Brett R. Whitmire | DIOD | Diodes Incorporated Common Stock | Sale | -3.94% | $111,790 | $55.90 | -2,000 | 48,777 | 27 Aug 2025 | Direct |
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -1.63% | $53,217 | $53.22 | -1,000 | 60,479 | 19 Aug 2025 | Direct |
| Andy Kuo-Ting Tsong | DIOD | Diodes Incorporated Common Stock | Tax liability | -0.81% | -320 | 39,222 | 01 Jul 2025 | Direct | ||
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Tax liability | -0.22% | -183 | 83,911 | 27 May 2025 | Direct | ||
| Keh Shew Lu | DIOD | Diodes Incorporated Common Stock | Tax liability | -2.03% | -2,166 | 104,625 | 27 May 2025 | Direct | ||
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Gift | 1,576 | 1,576 | 21 May 2025 | Custodial | |||
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Gift | -80.2% | -2,364 | 584 | 21 May 2025 | Oner Family Revocable Trust |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.