Who owns DIOD (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-Q1 13F filings. 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 2025-Q4 and 2026-Q1: 130 added or opened and 32 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, FMR LLC, 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
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 2025-Q4 and 2026-Q1, across 334 tracked filers holding DIOD, 188 increased or opened the position and 138 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 2025-Q4 and 2026-Q1 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 25
- VANGUARD PORTFOLIO MANAGEMENT LLC$248M
- VANGUARD CAPITAL MANAGEMENT LLC$135M
- FULLER & THALER ASSET MANAGEMENT, INC.$29M
- VANGUARD FIDUCIARY TRUST CO$20M
- EMERALD ADVISERS, LLC$12M
- EMERALD MUTUAL FUND ADVISERS TRUST$8M
Full exits 16
- VANGUARD GROUP INC$286M
- Cinctive Capital Management LP$8M
- Pacer Advisors, Inc.$7M
- HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC$6M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$6M
- ExodusPoint Capital Management, LP$4M
Largest adds
- FMR LLC$76M
- DIMENSIONAL FUND ADVISORS LP$49M
- Invesco Ltd.$45M
- STATE STREET CORP$39M
- GEODE CAPITAL MANAGEMENT, LLC$31M
- GOLDMAN SACHS GROUP INC$31M
Largest trims
- BlackRock, Inc.$14M
- T. Rowe Price Investment Management, Inc.$5M
- AMERICAN CENTURY COMPANIES INC$3M
- Trexquant Investment LP$3M
- BARCLAYS PLC$3M
- JPMORGAN CHASE & CO$3M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC trimmed | 5,672,530 | $387M | 11.9% | 2026-Q1 |
| BlackRock, Inc. trimmed | 4,999,752 | $341M | 10.5% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,638,932 | $248M | 7.7% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,436,359 | $166M | 5.1% | 2026-Q1 |
| STATE STREET CORP trimmed | 2,282,049 | $156M | 4.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,982,166 | $135M | 4.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,664,526 | $114M | 3.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,436,862 | $98M | 3.0% | 2026-Q1 |
| EARNEST PARTNERS LLC trimmed | 1,001,435 | $68M | 2.1% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 931,131 | $64M | 2.0% | 2026-Q1 |
| Global Alpha Capital Management Ltd. trimmed | 837,654 | $57M | 1.8% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 791,636 | $54M | 1.7% | 2026-Q1 |
| Invesco Ltd. added | 788,792 | $54M | 1.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 772,338 | $53M | 1.6% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC trimmed | 592,499 | $40M | 1.2% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 582,236 | $40M | 1.2% | 2026-Q1 |
| NORTHERN TRUST CORP added | 542,209 | $37M | 1.1% | 2026-Q1 |
| BESSEMER GROUP INC added | 444,540 | $30M | 0.9% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 443,123 | $30M | 0.9% | 2026-Q1 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC trimmed | 441,562 | $30M | 0.9% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 428,170 | $29M | 0.9% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 390,807 | $27M | 0.8% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 360,138 | $25M | 0.8% | 2026-Q1 |
| Boston Partners added | 343,031 | $23M | 0.7% | 2026-Q1 |
| Tributary Capital Management, LLC trimmed | 341,227 | $23M | 0.7% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 333,424 | $23M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 294,029 | $20M | 0.6% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 284,235 | $19M | 0.6% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC added | 254,167 | $18M | 0.5% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 262,199 | $17M | 0.5% | 2026-Q1 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 224,300 | $15M | 0.5% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 222,963 | $15M | 0.5% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 221,015 | $15M | 0.5% | 2026-Q1 |
| UBS Group AG added | 212,472 | $15M | 0.4% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 202,781 | $14M | 0.4% | 2026-Q1 |
| GLENMEDE TRUST CO NA trimmed | 187,529 | $13M | 0.4% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 185,872 | $13M | 0.4% | 2026-Q1 |
| EMERALD ADVISERS, LLC trimmed | 181,053 | $12M | 0.4% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 171,266 | $12M | 0.4% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 169,466 | $12M | 0.4% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 166,848 | $11M | 0.4% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 165,267 | $11M | 0.3% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC trimmed | 164,673 | $11M | 0.3% | 2026-Q1 |
| Public Sector Pension Investment Board added | 164,080 | $11M | 0.3% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 149,947 | $10M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 140,098 | $10M | 0.3% | 2026-Q1 |
| Allianz Asset Management GmbH trimmed | 138,332 | $9M | 0.3% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 123,440 | $8M | 0.3% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 118,965 | $8M | 0.3% | 2026-Q1 |
| Bridge City Capital, LLC added | 117,734 | $8M | 0.2% | 2026-Q1 |
| EMERALD MUTUAL FUND ADVISERS TRUST trimmed | 114,097 | $8M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 106,339 | $7M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 104,569 | $7M | 0.2% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. trimmed | 100,367 | $7M | 0.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 97,605 | $7M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 96,243 | $7M | 0.2% | 2026-Q1 |
| SEI INVESTMENTS CO added | 96,100 | $7M | 0.2% | 2026-Q1 |
| Longaeva Partners L.P. new | 94,881 | $6M | 0.2% | 2026-Q1 |
| NORGES BANK added | 146,370 | $6M | 0.2% | 2026-Q1 |
| Swiss National Bank | 91,600 | $6M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 85,764 | $6M | 0.2% | 2026-Q1 |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC new | 85,000 | $6M | 0.2% | 2026-Q1 |
| Creative Planning added | 84,892 | $6M | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 82,599 | $6M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 75,426 | $5M | 0.2% | 2026-Q1 |
| PDT Partners, LLC | 72,165 | $5M | 0.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 65,577 | $4M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM added | 64,327 | $4M | 0.1% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 58,999 | $4M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 54,987 | $4M | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 53,155 | $4M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 53,094 | $4M | 0.1% | 2026-Q1 |
| EASTERLY INVESTMENT PARTNERS LLC added | 51,792 | $3M | 0.1% | 2026-Q1 |
| ESSEX INVESTMENT MANAGEMENT CO LLC new | 48,869 | $3M | 0.1% | 2026-Q1 |
| FIRST NATIONAL BANK OF OMAHA added | 47,209 | $3M | 0.1% | 2026-Q1 |
| Man Group plc added | 46,970 | $3M | 0.1% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 44,153 | $3M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 60,819 | $3M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 5,786,823 | $286M | 8.8% | 2025-Q4 stale |
| MACQUARIE GROUP LTD trimmed | 771,625 | $41M | 1.3% | 2025-Q3 stale |
| Glenmede Investment Management, LP trimmed | 222,626 | $12M | 0.4% | 2025-Q3 stale |
| Cubist Systematic Strategies, LLC added | 201,038 | $9M | 0.3% | 2025-Q1 stale |
| Assenagon Asset Management S.A. added | 154,773 | $8M | 0.3% | 2025-Q3 stale |
| Cinctive Capital Management LP added | 156,060 | $8M | 0.2% | 2025-Q4 stale |
| Pacer Advisors, Inc. added | 147,336 | $7M | 0.2% | 2025-Q4 stale |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 131,606 | $6M | 0.2% | 2025-Q4 stale |
| WINTON GROUP Ltd added | 116,920 | $6M | 0.2% | 2025-Q2 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 122,851 | $6M | 0.2% | 2025-Q4 stale |
| TWINBEECH CAPITAL LP added | 131,724 | $6M | 0.2% | 2025-Q1 stale |
| Qube Research & Technologies Ltd added | 114,085 | $5M | 0.2% | 2025-Q1 stale |
| ExodusPoint Capital Management, LP added | 91,065 | $4M | 0.1% | 2025-Q4 stale |
| TUDOR INVESTMENT CORP ET AL added | 103,222 | $4M | 0.1% | 2025-Q1 stale |
| Jain Global LLC trimmed | 76,142 | $4M | 0.1% | 2025-Q3 stale |
| California Public Employees Retirement System added | 74,939 | $4M | 0.1% | 2025-Q2 stale |
| DARK FOREST CAPITAL MANAGEMENT LP trimmed | 71,954 | $4M | 0.1% | 2025-Q2 stale |
| Numerai GP LLC added | 69,909 | $4M | 0.1% | 2025-Q2 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 71,351 | $4M | 0.1% | 2025-Q4 stale |
| Brandywine Global Investment Management, LLC new | 69,378 | $3M | 0.1% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 65,000 | $3M | 0.1% | 2025-Q4 stale |
| WELLINGTON MANAGEMENT GROUP LLP added | 57,172 | $3M | 0.1% | 2025-Q2 stale |
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.