DIODES INC /DEL/
DIOD · Semiconductors & Related Devices · 45.9M shares · -3%/yr ↓ buyback · EDGAR filings ↗
Reference price $104.48 · est. market cap ~$4.8B — last insider sale, 2026-05-29 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
C62Near-debt-free discrete/analog semiconductor maker recovering from the downcycle, with solid FCF but still-thin operating margins.
Strengths
- Near debt-free with strong liquidity — D/E 0.01 (17th), current ratio 3.32 (59th)
- Cyclical recovery underway — revenue +13.0% (50th), net income +50.2% (77th)
- Positive free cash flow — FCF $137.2M (65th), FCF margin 9.3%
Risks
- Thin operating margin — 2.4% (54th) — recovery still early
- Semiconductor cyclicality and competition — risk factors stress a highly competitive, cyclical industry
- Modest returns — ROE 3.5% (49th), ROA 2.7%
Notable findings
- Exec changeRecent 8-K item 5.02 8-K ↗
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC, RENAISSANCE TECHNOLOGIES LLC
- Auditor changeRecent 8-K item 4.01 8-K ↗
- Buying back stockNet buyback — share count -3%/yr over 4y
- Strong balance sheetStrong balance sheet — $398M cash & investments
- New fund positionNotable fund(s) opened this quarter: Bridgewater Associates, LP
- Insider sellingInsider selling — 27 open-market sale(s) by 8 insider(s) (cluster of 8 insiders, ~$16M, last 6mo) Form 4 ↗
- Notable holderHeld by 5 notable fund(s): FMR LLC, STATE STREET CORP, GOLDMAN SACHS GROUP INC +2 more (as of 2026-03-31)
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Gross margin
31.2%
Operating margin
2.4%
Net margin
4.5%
Return on equity
3.5%
Return on assets
2.7%
ROIC
1.5%
Revenue growth (QoQ)
3.5%
Net-income growth
50.2%
Debt / equity
0.0×
Current ratio
3.3×
Free cash flow
$137M
Tangible book value
$1.6B
Cash & investments
$398M
Stock comp / revenue
1.7%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-05-29 | Tang Francis | Sell | 15K | $112.04 |
| 2026-05-29 | White Richard Dallas | Sell | 2.0K | $107.01 |
| 2026-05-29 | White Richard Dallas | Sell | 1.0K | $104.48 |
| 2026-05-27 | Yu Gary | Sell | 3.6K | $110.08 |
| 2026-05-27 | Yang Emily | Sell | 3.0K | $110.08 |
| 2026-05-27 | Tang Francis | Sell | 5.0K | $110.08 |
| 2026-05-26 | Tang Francis | Sell | 4.1K | $108.00 |
| 2026-05-26 | Zhao Jin | Sell | 3.7K | $106.86 |
| 2026-05-26 | Yang Emily | Sell | 2.0K | $107.52 |
| 2026-05-26 | LU KEH SHEW | Tax withheld | 2.0K | $108.24 |
| 2026-05-26 | Tsong Andy | Sell | 1.6K | $106.95 |
| 2026-05-26 | Yu Gary | Tax withheld | 592 | $108.24 |
| 2026-05-20 | Yang Emily | Sell | 2.0K | $96.81 |
| 2026-05-19 | Yu Gary | Gift | 300 | — |
| 2026-05-15 | Yang Emily | Sell | 2.0K | $101.47 |
| 2026-05-13 | Whitmire Brett R | Sell | 17K | $103.34 |
| 2026-05-12 | Zhao Jin | Sell | 2.8K | $102.36 |
| 2026-05-12 | Tsong Andy | Sell | 2.7K | $110.00 |
| 2026-05-12 | Tang Francis | Sell | 3.6K | $108.00 |
| 2026-05-11 | Bull Elizabeth | Grant | 3.0K | — |
| 2026-05-11 | Su Huey-Jen Jenny | Grant | 3.0K | — |
| 2026-05-11 | Yu Gary | Grant | 3.0K | — |
| 2026-05-11 | Chen Button Angie | Grant | 6.0K | — |
| 2026-05-11 | Chen Warren | Grant | 3.0K | — |
| 2026-05-11 | RITTER PHILIP J | Grant | 3.0K | — |
| 2026-02-24 | Yang Emily | Sell | 2.2K | $69.89 |
| 2026-02-24 | Yu Gary | Sell | 2.0K | $70.00 |
| 2026-02-20 | LU KEH SHEW | Sell | 47K | $67.78 |
| 2026-02-20 | LU KEH SHEW | Sell | 64K | $67.74 |
| 2026-02-13 | Whitmire Brett R | Sell | 6.0K | $71.22 |
| 2026-02-13 | Yang Emily | Sell | 1.0K | $71.89 |
| 2026-02-13 | Tsong Andy | Sell | 3.3K | $70.46 |
| 2026-02-03 | Yang Emily | Sell | 950 | $60.85 |
| 2026-02-03 | Yu Gary | Sell | 2.9K | $60.85 |
| 2026-02-03 | Whitmire Brett R | Sell | 830 | $60.85 |
| 2026-02-02 | LU KEH SHEW | Tax withheld | 12K | $60.66 |
| 2026-02-02 | Tang Francis | Tax withheld | 2.1K | $60.66 |
| 2026-02-02 | Yu Gary | Tax withheld | 1.3K | $60.66 |
| 2026-02-02 | Yang Emily | Tax withheld | 2.5K | $60.66 |
| 2026-02-02 | Tsong Andy | Tax withheld | 1.5K | $60.66 |
| 2026-02-02 | Whitmire Brett R | Tax withheld | 2.8K | $60.66 |
| 2026-02-02 | Zhao Jin | Tax withheld | 1.8K | $60.66 |
| 2026-02-02 | Zhao Jin | Sell | 525 | $59.19 |
| 2026-02-01 | Yang Emily | Grant | 18K | — |
| 2026-02-01 | Zhao Jin | Grant | 18K | — |
| 2026-02-01 | Zhao Jin | Grant | 18K | — |
| 2026-02-01 | Yu Gary | Grant | 32K | — |
| 2026-02-01 | Yu Gary | Grant | 32K | — |
| 2026-02-01 | Yang Emily | Grant | 18K | — |
| 2026-02-01 | Whitmire Brett R | Grant | 22K | — |
| 2026-02-01 | Whitmire Brett R | Grant | 22K | — |
| 2026-02-01 | Tang Francis | Grant | 13K | — |
| 2026-02-01 | Tang Francis | Grant | 13K | — |
| 2026-02-01 | Tsong Andy | Grant | 18K | — |
| 2026-02-01 | Tsong Andy | Grant | 18K | — |
| 2025-11-12 | LU KEH SHEW | Sell | 2.1K | $47.46 |
| 2025-11-12 | LU KEH SHEW | Sell | 3.9K | $47.40 |
| 2025-08-28 | Yang Emily | Sell | 1.0K | $56.36 |
| 2025-08-27 | Whitmire Brett R | Sell | 2.0K | $55.90 |
| 2025-08-19 | Yang Emily | Sell | 1.0K | $53.22 |
| 2025-07-01 | Tsong Andy | Tax withheld | 320 | $55.30 |
| 2025-05-27 | LU KEH SHEW | Tax withheld | 2.2K | $46.61 |
| 2025-05-27 | Yu Gary | Tax withheld | 183 | $46.61 |
| 2025-05-21 | Yang Emily | Gift | 1.6K | — |
| 2025-05-21 | Yang Emily | Gift | 788 | — |
| 2025-05-21 | Yang Emily | Gift | 1.6K | — |
| 2025-05-20 | Yang Emily | Gift | 2.9K | — |
| 2025-05-20 | Yang Emily | Gift | 2.9K | — |
| 2025-05-13 | Yu Gary | Grant | 1.9K | — |
| 2025-05-13 | Yu Gary | Grant | 3.0K | — |
| 2025-05-13 | Feiger Robert E | Grant | 3.0K | — |
| 2025-05-13 | Chen Button Angie | Grant | 3.0K | — |
| 2025-05-13 | Bull Elizabeth | Grant | 3.0K | — |
| 2025-05-13 | Su Huey-Jen Jenny | Grant | 3.0K | — |
| 2025-05-13 | Chen Warren | Grant | 3.0K | — |
| 2025-05-13 | LU KEH SHEW | Grant | 3.0K | — |
| 2025-04-01 | Tsong Andy | Tax withheld | 320 | $43.08 |
| 2025-02-24 | Yang Emily | Tax withheld | 680 | $54.26 |
| 2025-02-24 | Zhao Jin | Tax withheld | 244 | $54.26 |
| 2025-02-24 | Yu Gary | Tax withheld | 518 | $54.26 |
| 2025-02-24 | Tang Francis | Tax withheld | 463 | $54.26 |
| 2025-02-24 | LU KEH SHEW | Tax withheld | 3.1K | $54.26 |
| 2025-02-24 | Whitmire Brett R | Tax withheld | 748 | $54.26 |
| 2025-02-04 | Yu Gary | Sell | 2.9K | $56.04 |
| 2025-02-04 | Whitmire Brett R | Sell | 830 | $56.04 |
| 2025-02-04 | Yang Emily | Sell | 950 | $56.04 |
| 2025-02-03 | Tang Francis | Grant | 8.0K | — |
| 2025-02-03 | Tang Francis | Tax withheld | 1.6K | $56.45 |
| 2025-02-03 | Tang Francis | Grant | 8.0K | — |
| 2025-02-03 | LU KEH SHEW | Grant | 25K | — |
| 2025-02-03 | LU KEH SHEW | Tax withheld | 9.8K | $56.45 |
| 2025-02-03 | LU KEH SHEW | Grant | 25K | — |
| 2025-02-03 | Yu Gary | Grant | 22K | — |
| 2025-02-03 | Yu Gary | Tax withheld | 2.0K | $56.45 |
| 2025-02-03 | Yu Gary | Grant | 22K | — |
| 2025-02-03 | Tsong Andy | Grant | 8.0K | — |
| 2025-02-03 | Tsong Andy | Tax withheld | 1.0K | $56.45 |
| 2025-02-03 | Tsong Andy | Grant | 8.0K | — |
| 2025-02-03 | Whitmire Brett R | Grant | 8.0K | — |
| 2025-02-03 | Whitmire Brett R | Tax withheld | 2.0K | $56.45 |
| 2025-02-03 | Whitmire Brett R | Grant | 8.0K | — |
| 2025-02-03 | Zhao Jin | Grant | 8.0K | — |
| 2025-02-03 | Zhao Jin | Tax withheld | 1.4K | $56.45 |
| 2025-02-03 | Yang Emily | Grant | 8.0K | — |
| 2025-02-03 | Zhao Jin | Grant | 8.0K | — |
| 2025-02-03 | Yang Emily | Tax withheld | 1.8K | $56.45 |
| 2025-02-03 | Yang Emily | Grant | 8.0K | — |
All non-derivative Form 4 activity (SEC), newest first.
Supply chain
Customers (1)
- Keylink International (B.V.I.) Inc.
Suppliers (3)
- Jiyuan Crystal Photoelectric Frequency Technology Ltd.
- Keylink International (B.V.I.) Inc.
- Nuvoton Technology Corporation
Named in the 10-K; linked when we track them.
Notable events (8-K)
| Date | Items | |
|---|---|---|
| 2026-05-12 | Exec/director changeShareholder voteReg FDExhibits | filing ↗ |
| 2026-05-12 | ResultsReg FDExhibits | filing ↗ |
| 2026-05-07 | ResultsReg FDOtherExhibits | filing ↗ |
| 2026-04-16 | Reg FDExhibits | filing ↗ |
| 2026-03-11 | Auditor changeExhibits | filing ↗ |
| 2026-02-12 | ResultsReg FDExhibits | filing ↗ |
| 2026-02-10 | ResultsReg FDOtherExhibits | filing ↗ |
| 2026-01-20 | Reg FDExhibits | filing ↗ |
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-05-12 | 2026-05-11 | 0001193125-26-217617 ↗ |
| 8-K | 2026-05-12 | 2026-05-07 | 0001193125-26-219765 ↗ |
| 10-Q | 2026-05-07 | 2026-03-31 | 0001193125-26-212380 ↗ |
| 8-K | 2026-05-07 | 2026-05-07 | 0001193125-26-212347 ↗ |
| 8-K | 2026-04-16 | 2026-04-16 | 0001193125-26-159248 ↗ |
| 8-K | 2026-03-11 | 2026-03-05 | 0001193125-26-102267 ↗ |
| 8-K | 2026-02-12 | 2026-02-10 | 0001193125-26-048964 ↗ |
| 10-K | 2026-02-10 | 2025-12-31 | 0001193125-26-044918 ↗ |
| 8-K | 2026-02-10 | 2026-02-10 | 0001193125-26-044898 ↗ |
| 8-K | 2026-01-20 | 2026-01-20 | 0001193125-26-016765 ↗ |
| 8-K | 2025-11-12 | 2025-11-06 | 0001193125-25-277876 ↗ |
| 8-K | 2025-11-06 | 2025-11-06 | 0001193125-25-270059 ↗ |