Who owns Diodes (DIOD)
Which tracked institutional funds hold DIOD, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See DIOD company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on DIOD is one-sided between 2026-Q1 and 2026-Q2: 158 added or opened and 41 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
DIOD’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes DIOD more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in DIOD divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 367 tracked filers holding DIOD, 212 increased or opened the position and 173 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in DIOD between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 23
- Artemis Investment Management LLP$38M
- Alyeska Investment Group, L.P.$19M
- LOOMIS SAYLES & CO L P$13M
- SCALAR GAUGE MANAGEMENT, LLC$10M
- WELLINGTON MANAGEMENT GROUP LLP$10M
- Andar Capital Management HK Ltd$9M
Full exits 26
- FRONTIER CAPITAL MANAGEMENT CO LLC$40M
- BESSEMER GROUP INC$30M
- T. Rowe Price Investment Management, Inc.$7M
- Longaeva Partners L.P.$6M
- NORGES BANK$6M
- JANE STREET GROUP, LLC$6M
Largest adds
- BlackRock, Inc.$463M
- VANGUARD PORTFOLIO MANAGEMENT LLC$161M
- WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC$154M
- STATE STREET CORP$129M
- PRICE T ROWE ASSOCIATES INC /MD/$103M
- FMR LLC$92M
Largest trims
- GOLDMAN SACHS GROUP INC$26M
- TWO SIGMA INVESTMENTS, LP$6M
- D. E. Shaw & Co., Inc.$6M
- BANK OF AMERICA CORP /DE/$5M
- KENNEDY CAPITAL MANAGEMENT LLC$4M
- BALYASNY ASSET MANAGEMENT L.P.$3M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 7,345,758 | $804M | 16.9% | 2026-Q2 |
| FMR LLC trimmed | 4,380,124 | $479M | 10.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 3,742,338 | $410M | 8.6% | 2026-Q2 |
| STATE STREET CORP added | 2,605,247 | $285M | 6.0% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 2,200,506 | $241M | 5.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,994,456 | $218M | 4.6% | 2026-Q2 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC added | 1,682,686 | $184M | 3.9% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,647,832 | $180M | 3.8% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,045,681 | $114M | 2.4% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 976,111 | $107M | 2.2% | 2026-Q2 |
| EARNEST PARTNERS LLC trimmed | 964,595 | $106M | 2.2% | 2026-Q2 |
| Invesco Ltd. added | 889,222 | $97M | 2.0% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 806,886 | $88M | 1.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 728,885 | $80M | 1.7% | 2026-Q2 |
| Global Alpha Capital Management Ltd. trimmed | 578,999 | $63M | 1.3% | 2026-Q2 |
| NORTHERN TRUST CORP added | 574,559 | $63M | 1.3% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 507,594 | $56M | 1.2% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 480,789 | $53M | 1.1% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 443,716 | $49M | 1.0% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 413,750 | $45M | 0.9% | 2026-Q2 |
| Bank of New York Mellon Corp added | 378,480 | $41M | 0.9% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 358,368 | $39M | 0.8% | 2026-Q2 |
| Boston Partners added | 357,679 | $39M | 0.8% | 2026-Q2 |
| Artemis Investment Management LLP new | 351,347 | $38M | 0.8% | 2026-Q2 |
| EMERALD ADVISERS, LLC added | 345,473 | $38M | 0.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 338,980 | $37M | 0.8% | 2026-Q2 |
| Tributary Capital Management, LLC trimmed | 328,249 | $36M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 323,459 | $35M | 0.7% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 308,948 | $34M | 0.7% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 246,161 | $27M | 0.6% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 233,396 | $24M | 0.5% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 224,127 | $25M | 0.5% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 223,146 | $24M | 0.5% | 2026-Q2 |
| EMERALD MUTUAL FUND ADVISERS TRUST added | 221,380 | $24M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 195,305 | $21M | 0.4% | 2026-Q2 |
| GLENMEDE TRUST CO NA trimmed | 180,071 | $20M | 0.4% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 178,514 | $19M | 0.4% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 172,253 | $19M | 0.4% | 2026-Q2 |
| Alyeska Investment Group, L.P. new | 172,185 | $19M | 0.4% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 164,880 | $18M | 0.4% | 2026-Q2 |
| MetLife Investment Management, LLC added | 162,547 | $18M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 157,870 | $17M | 0.4% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 155,747 | $17M | 0.4% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 136,505 | $15M | 0.3% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC trimmed | 135,612 | $15M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 135,343 | $15M | 0.3% | 2026-Q2 |
| G2 Investment Partners Management LLC added | 129,930 | $14M | 0.3% | 2026-Q2 |
| UBS Group AG trimmed | 123,662 | $14M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 122,810 | $13M | 0.3% | 2026-Q2 |
| Nuveen, LLC added | 121,386 | $13M | 0.3% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 117,665 | $13M | 0.3% | 2026-Q2 |
| LOOMIS SAYLES & CO L P new | 117,481 | $13M | 0.3% | 2026-Q2 |
| Legal & General Group Plc added | 108,160 | $12M | 0.2% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 98,146 | $11M | 0.2% | 2026-Q2 |
| Creative Planning added | 94,687 | $10M | 0.2% | 2026-Q2 |
| SCALAR GAUGE MANAGEMENT, LLC new | 93,000 | $10M | 0.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 92,395 | $10M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 90,000 | $10M | 0.2% | 2026-Q2 |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC added | 90,000 | $10M | 0.2% | 2026-Q2 |
| Bridge City Capital, LLC trimmed | 86,531 | $9M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 84,693 | $9M | 0.2% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 83,166 | $9M | 0.2% | 2026-Q2 |
| Andar Capital Management HK Ltd new | 80,000 | $9M | 0.2% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 78,903 | $9M | 0.2% | 2026-Q2 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC new | 77,730 | $9M | 0.2% | 2026-Q2 |
| WEDGE CAPITAL MANAGEMENT L L P/NC added | 75,885 | $8M | 0.2% | 2026-Q2 |
| Allianz Asset Management GmbH trimmed | 75,434 | $7M | 0.2% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 72,420 | $8M | 0.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 72,302 | $8M | 0.2% | 2026-Q2 |
| Jupiter Topco LLC new | 64,530 | $7M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 62,330 | $4M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 62,272 | $7M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 53,444 | $6M | 0.1% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P added | 49,142 | $5M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 48,901 | $5M | 0.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 48,715 | $5M | 0.1% | 2026-Q2 |
| ESSEX INVESTMENT MANAGEMENT CO LLC trimmed | 46,732 | $5M | 0.1% | 2026-Q2 |
| PDT Partners, LLC trimmed | 46,218 | $5M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 46,014 | $5M | 0.1% | 2026-Q2 |
| Prospect Capital Advisors, LLC added | 44,550 | $5M | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 44,470 | $5M | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP added | 42,422 | $5M | 0.1% | 2026-Q2 |
| Edgestream Partners, L.P. added | 41,879 | $5M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 38,453 | $4M | 0.1% | 2026-Q2 |
| GREAT LAKES ADVISORS, LLC trimmed | 37,584 | $4M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 37,185 | $4M | 0.1% | 2026-Q2 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC added | 36,780 | $4M | 0.1% | 2026-Q2 |
| CREDIT AGRICOLE S A added | 34,600 | $4M | 0.1% | 2026-Q2 |
| FIRST NATIONAL BANK OF OMAHA trimmed | 34,531 | $4M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 34,138 | $4M | 0.1% | 2026-Q2 |
| Legato Capital Management LLC added | 33,885 | $4M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 33,426 | $4M | 0.1% | 2026-Q2 |
| OAK ASSOCIATES LTD /OH/ | 33,020 | $4M | 0.1% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 30,924 | $3M | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 30,117 | $3M | 0.1% | 2026-Q2 |
| EASTERLY INVESTMENT PARTNERS LLC trimmed | 29,646 | $3M | 0.1% | 2026-Q2 |
| J. Goldman & Co LP added | 26,573 | $3M | 0.1% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 26,531 | $3M | 0.1% | 2026-Q2 |
| Illinois Municipal Retirement Fund added | 25,399 | $3M | 0.1% | 2026-Q2 |
| Oliver Luxxe Assets LLC trimmed | 24,258 | $3M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.