Who owns Diodes (DIOD)?
114 holders named in SEC filings declare between 80.1% and 98.6% of Diodes' shares outstanding, as of Jun 30, 2026. The largest are BlackRock (16.0%), Vanguard (13.3%) and Fidelity (FMR) (9.5%); the five largest hold 49.2% together. Another 287 institutions hold small positions worth 3.0%. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 14.6% and sold 13.6% of the shares, a net purchase of 0.95%; 87 opened a position, 124 added, 119 reduced and 29 sold out. Biggest buyers: WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (+1.2M shares) and T. Rowe Price (+822,650 shares). Biggest sellers: Fidelity (FMR) (-1.3M) and Morgan Stanley (-618,845). Schedule 13D/G filings since Mar 31, 2026: Dimensional Fund Advisors LP fell below 5% (4.8% still declared) on Jun 30, 2026, FMR LLC cut its stake to 9.5% on Jun 30, 2026 and STATE STREET CORPORATION raised its stake to 5.7% on Jun 30, 2026. Directors and officers, from their latest Form 4: Keh Shew Lu (1.1%). Over time, 388 managers declared Diodes in their 13F for Q2 2026, against 233 for Q4 2019: together at most 99.8% of the shares outstanding, against 82.8%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| BlackRock | 13F | 16.0% | Jun 30, 2026 | Q4 2019 or earlier |
| Vanguard | 13F | 13.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Fidelity (FMR) | 13F | 9.5% | Jun 30, 2026 | Q4 2019 or earlier |
| State Street | 13F | 5.7% | Jun 30, 2026 | Q4 2019 or earlier |
| Dimensional | 13F | 4.8% | Jun 30, 2026 | Q4 2019 or earlier |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 13F | 3.7% | Jun 30, 2026 | Q3 2023 |
| Geode Capital | 13F | 3.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Morgan Stanley | 13F | 2.3% | Jun 30, 2026 | Q4 2019 or earlier |
| T. Rowe Price | 13F | 2.1% | Jun 30, 2026 | Q4 2019 or earlier |
| EARNEST PARTNERS LLC | 13F | 2.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Invesco | 13F | 1.9% | Jun 30, 2026 | Q4 2019 or earlier |
| American Century Companies, Inc. | 13F | 1.8% | Jun 30, 2026 | Q4 2019 or earlier |
| Charles Schwab | 13F | 1.6% | Jun 30, 2026 | Q4 2019 or earlier |
| Global Alpha Capital Management Ltd. | 13F | 1.3% | Jun 30, 2026 | Q3 2023 |
| Northern Trust | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Victory Capital Management, Inc. | 13F | 1.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Keh Shew Lu | Form 4 | 1.1% | May 26, 2026 | — |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 13F | 1.0% | Jun 30, 2026 | Q4 2025 |
| BESSEMER GROUP INC | 13F | 1.0% | Jun 30, 2026 | Q4 2022 |
| Fuller & Thaler Asset Management, Inc. | 13F | 0.96% | Jun 30, 2026 | Q1 2026 |
| OBERWEIS ASSET MANAGEMENT INC/ | 13F | 0.90% | Jun 30, 2026 | Q2 2025 |
| BNY | 13F | 0.82% | Jun 30, 2026 | Q4 2019 or earlier |
| PANAGORA ASSET MANAGEMENT INC | 13F | 0.78% | Jun 30, 2026 | Q3 2025 |
| Boston Partners | 13F | 0.78% | Jun 30, 2026 | Q3 2024 |
| Artemis Investment Management LLP | 13F | 0.76% | Jun 30, 2026 | Q2 2026 |
Diodes institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 233 | 82.8% | $2.4B | 54.9% |
| Q4 2020 | 247 | 79.4% | $2.9B | 52.0% |
| Q4 2021 | 304 | 94.3% | $4.7B | 52.3% |
| Q4 2022 | 324 | 98.2% | $3.4B | 52.1% |
| Q4 2023 | 328 | 99.0% | $3.7B | 51.0% |
| Q4 2024 | 266 | 103.7% | $3.0B | 52.7% |
| Q4 2025 | 297 | 95.7% | $2.2B | 49.5% |
| Q2 2026 | 388 | 99.8% | $5.0B | 50.4% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.