Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
323 institutional managers reported holding DIOD for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 64%. 63 opened new positions; 38 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 7.20M | 15.60% | $491.8M | unchanged | ≤2013 |
| Vanguard Group | 6.00M | 13.00% | $409.9M | trimmed -2.6% | ≤2013 |
| FMR (Fidelity) | 5.69M | 12.33% | $388.6M | trimmed -9.8% | 2019 Q4 |
| Dimensional Fund Advisors | 2.44M | 5.28% | $166.5M | added +2.3% | ≤2013 |
| State Street | 2.28M | 4.95% | $155.9M | trimmed -3.6% | ≤2013 |
| Morgan Stanley | 1.66M | 3.61% | $113.7M | trimmed -7.1% | ≤2013 |
| Geode Capital | 1.44M | 3.11% | $98.2M | added +6.4% | ≤2013 |
| Earnest Partners LLC | 1.00M | 2.17% | $68.4M | trimmed -1.7% | 2019 Q4 |
| Goldman Sachs | 931.1k | 2.02% | $63.6M | added +41.8% | ≤2013 |
| Global Alpha Capital Management LTD. | 837.7k | 1.82% | $57.2M | trimmed -2% | 2023 Q3 |
| Invesco | 828.4k | 1.80% | $56.6M | added +379% | ≤2013 |
| Victory Capital Management INC | 791.6k | 1.72% | $54.1M | added +55.3% | 2015 Q1 |
| Charles Schwab Investment Management | 772.3k | 1.67% | $52.8M | trimmed -3.1% | ≤2013 |
| Frontier Capital Management CO LLC | 592.5k | 1.28% | $40.5M | trimmed -4.3% | 2023 Q3 |
| Nomura Asset Management International INC. | 582.2k | 1.26% | $39.8M | trimmed -1.6% | 2025 Q4 |
| Northern Trust | 542.2k | 1.18% | $37.0M | added +3.8% | ≤2013 |
| Bessemer Group INC | 444.5k | 0.96% | $30.4M | added +5.9% | 2022 Q4 |
| Arrowstreet Capital | 443.1k | 0.96% | $30.3M | trimmed -27.8% | 2025 Q3 |
| William Blair Investment Management, LLC | 441.6k | 0.96% | $30.2M | trimmed -6.5% | 2023 Q3 |
| Fuller & Thaler Asset Management, INC. | 428.2k | 0.93% | $29.3M | opened | 2026 Q1 |
| Bank OF America CORP /DE/ | 390.8k | 0.85% | $26.7M | added +11.3% | ≤2013 |
| Royal Bank OF Canada | 360.1k | 0.78% | $24.6M | trimmed -4.7% | ≤2013 |
| Boston Partners | 343.0k | 0.74% | $23.4M | added +853.7% | 2024 Q1 |
| Tributary Capital Management, LLC | 341.2k | 0.74% | $23.3M | trimmed -1.4% | 2020 Q2 |
| Ameriprise Financial INC | 333.4k | 0.72% | $22.8M | trimmed -6.3% | ≤2013 |
| UBS | 298.2k | 0.65% | $20.4M | added +122.9% | ≤2013 |
| BNY Mellon | 284.2k | 0.62% | $19.4M | trimmed -3.7% | ≤2013 |
| Allspring Global Investments Holdings, LLC | 254.2k | 0.55% | $17.4M | added +8% | 2021 Q4 |
| Oberweis Asset Management INC/ | 224.3k | 0.49% | $15.3M | added +47.7% | 2025 Q2 |
| Principal Financial Group INC | 223.0k | 0.48% | $15.2M | added +0.9% | ≤2013 |
| Two Sigma | 221.0k | 0.48% | $15.1M | trimmed -5.3% | 2025 Q1 |
| D. E. Shaw | 202.8k | 0.44% | $13.9M | trimmed -35.7% | ≤2013 |
| AQR Capital | 188.4k | 0.41% | $12.9M | added +31.2% | 2017 Q2 |
| Glenmede Trust CO NA | 187.5k | 0.41% | $12.8M | trimmed -8.4% | 2017 Q4 |
| Emerald Advisers, LLC | 181.1k | 0.39% | $12.4M | opened | 2026 Q1 |
| Kennedy Capital Management LLC | 171.3k | 0.37% | $11.7M | trimmed -1.6% | 2020 Q2 |
| Panagora Asset Management INC | 169.5k | 0.37% | $11.6M | added +339% | 2025 Q3 |
| Balyasny Asset Management | 166.8k | 0.36% | $11.4M | added +3548.5% | 2022 Q3 |
| Envestnet Asset Management INC | 165.3k | 0.36% | $11.3M | added +16.2% | ≤2013 |
| Lazard Asset Management LLC | 164.7k | 0.36% | $11.3M | trimmed -18.4% | 2025 Q2 |
| Public Sector Pension Investment Board | 164.1k | 0.36% | $11.2M | added +2.2% | ≤2013 |
| Russell Investments Group, LTD. | 149.9k | 0.33% | $10.2M | added +125.9% | 2016 Q4 |
| Rhumbline Advisers | 140.1k | 0.30% | $9.6M | added +1.3% | ≤2013 |
| Allianz Asset Management GmbH | 138.3k | 0.30% | $9.5M | trimmed -11.1% | 2021 Q3 |
| Prudential Financial INC | 123.4k | 0.27% | $8.4M | added +131.9% | ≤2013 |
| American Century Companies INC | 119.0k | 0.26% | $8.1M | trimmed -47.9% | 2017 Q4 |
| Bridge City Capital, LLC | 117.7k | 0.26% | $8.0M | added +1.2% | 2017 Q2 |
| Emerald Mutual Fund Advisers Trust | 114.1k | 0.25% | $7.8M | opened | 2026 Q1 |
| Legal & General Group PLC | 106.3k | 0.23% | $7.3M | trimmed -10.2% | 2014 Q3 |
| Nuveen | 104.6k | 0.23% | $7.1M | added +3.1% | 2019 Q2 |
Largest 50 of 323 shown; the full ranked, searchable register is at boothcheck.com/holders/DIOD. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.