Comparable stake leader
BlackRock, Inc.
SEC ownership of DIODES INC /DEL/
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000029002.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
11 May 2026
- Public ticker
- DIOD on Nasdaq
- Parsed ownership sources
- 13F, 13D/G, and 3/4/5
- Largest SEC-reported holder
- BlackRock, Inc.
- Latest 13D/G holder
- BlackRock, Inc.
- Latest parsed ownership date
- 11 May 2026
- Issuer CIK
- 0000029002
- Issuer location
- Plano, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of DIODES INC /DEL/ (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
11 May 2026
13F
13D/G
3/4/5
Lead comparable stake: 15%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 15%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
15%
FMR LLC
12%
VANGUARD PORTFOLIO MANAGEMENT LLC
8%
DIMENSIONAL FUND ADVISORS LP
5.1%
VANGUARD CAPITAL MANAGEMENT LLC
5.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
15%
from 13D/G
|
$491,374,651
7,198,574 shares
|
— | 31 Mar 2026 |
| FMR LLC |
13D/G
13F
Company
|
12%
|
$472,480,097
5,687,734 shares
|
-$51,456,964 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
8%
|
$249,597,946
3,656,577 shares
|
$0 | 31 Mar 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
Company
|
5.1%
from 13D/G
|
$166,294,107
2,436,359 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.1%
|
$159,295,768
2,333,662 shares
|
$0 | 31 Mar 2026 |
| STATE STREET CORP |
13D/G
13F
STATE STREET CORPORATION · Company
|
5%
|
$189,569,810
2,282,049 shares
|
-$14,748,746 | 31 Mar 2026 |
| Huey-Jen Jenny Su |
3/4/5
Director
|
0.01%
|
$409,560
6,000 shares
|
— | 11 May 2026 |
| Philip J. Ritter |
3/4/5
Director
|
0.01%
|
$204,780
3,000 shares
|
— | 11 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$16,977,094.
Buys
$0
Insiders: 0
Sells
$16,977,094
Insiders: 8
Net
-$16,977,094
Shares: -211,570
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 211,570
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 70,981 | $0 | $7,616,955 | -$7,616,955 |
| 3-6 | 0 | 130,589 | $0 | $8,854,268 | -$8,854,268 |
| 6-9 | 0 | 6,000 | $0 | $284,505 | -$284,505 |
| 9-12 | 0 | 4,000 | $0 | $221,367 | -$221,367 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to DIODES INC /DEL/. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
Keh Shew Lu
Net 12M change
-$16,977,095
Latest report
29 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Keh Shew Lu | Special Advisor | $41,198,858 | -$7,805,607 | -16% | Mixed | 26 May 2026 |
| Gary Yu | President and CEO, Director | $16,018,511 | -$716,276 | -4.3% | Mixed | 26 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 | ||
| Francis Tang | Chief Technology Officer | $9,750,648 | -$3,108,261 | -24% | Mixed | 29 May 2026 |
| Emily Yang | SVP Worldwide Sales/Marketing | $8,626,097 | -$1,331,657 | -13% | Mixed | 26 May 2026 |
| Andy Kuo-Ting Tsong | SVP Worldwide Products Group | $6,819,149 | -$691,815 | -9.2% | Mixed | 26 May 2026 |
| Michael R. Giordano | Director | $6,636,241 | Mixed | 24 May 2023 | ||
| Jin Zhao | President, Diodes Asia | $6,318,875 | -$707,800 | -10% | Mixed | 26 May 2026 |
| Richard D. White | Corporate Secretary | $6,302,113 | -$318,500 | -4.8% | Mixed | 29 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 | ||
| 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 |
Recent insider transactions for DIODES INC /DEL/
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Francis Tang | DIOD | Diodes Incorporated Common Stock | Sale | -17.7% | $1,717,621 | $112.04 | -15,330 | 71,438 | 29 May 2026 | Direct |
| Richard D. White | DIOD | Diodes Incorporated Common Stock | Sale | -27.1% | $318,500 | $106.17 | -3,000 | 8,071 | 29 May 2026 | Direct |
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -4.62% | $330,240 | $110.08 | -3,000 | 61,878 | 27 May 2026 | Direct |
| Francis Tang | DIOD | Diodes Incorporated Common Stock | Sale | -5.45% | $550,400 | $110.08 | -5,000 | 86,768 | 27 May 2026 | Direct |
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Sale | -3.25% | $399,811 | $110.08 | -3,632 | 108,147 | 27 May 2026 | Direct |
| Keh Shew Lu | DIOD | Diodes Incorporated Common Stock | Tax liability | -2.13% | -1,970 | 90,305 | 26 May 2026 | Direct | ||
| Jin Zhao | DIOD | Diodes Incorporated Common Stock | Sale | -7.81% | $394,209 | $106.86 | -3,689 | 43,531 | 26 May 2026 | Direct |
| Andy Kuo-Ting Tsong | DIOD | Diodes Incorporated Common Stock | Sale | -3.18% | $169,203 | $106.96 | -1,582 | 48,170 | 26 May 2026 | Direct |
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -2.99% | $215,040 | $107.52 | -2,000 | 64,878 | 26 May 2026 | Direct |
| Francis Tang | DIOD | Diodes Incorporated Common Stock | Sale | -4.31% | $446,796 | $108.00 | -4,137 | 91,768 | 26 May 2026 | Direct |
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Tax liability | -0.53% | -592 | 111,779 | 26 May 2026 | Direct | ||
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -2.9% | $193,620 | $96.81 | -2,000 | 66,878 | 20 May 2026 | Direct |
| Gary Yu | DIOD | Diodes Incorporated Common Stock | Gift | -0.27% | -300 | 112,371 | 19 May 2026 | Direct | ||
| Emily Yang | DIOD | Diodes Incorporated Common Stock | Sale | -2.82% | $202,930 | $101.46 | -2,000 | 68,878 | 15 May 2026 | Direct |
| 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 |
* marks a reported price that did not pass the local price check.