Who owns Silicon Motion Technology (SIMO)
Which tracked institutional funds hold SIMO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SIMO 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 SIMO is one-sided between 2026-Q1 and 2026-Q2: 216 added or opened and 42 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
SIMO’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 0.1% of theirs — a 0.1pp gap the other way — the median holder sizes SIMO more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in SIMO 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 365 tracked filers holding SIMO, 221 increased or opened the position and 176 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 SIMO 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 71
- ALKEON CAPITAL MANAGEMENT LLC$367M
- Polar Capital Holdings Plc$310M
- D. E. Shaw & Co., Inc.$121M
- BIT Capital GmbH$116M
- FengHe Fund Management Pte. Ltd.$60M
- Ratan Capital Management LP$39M
Full exits 30
- ACADIAN ASSET MANAGEMENT LLC$145M
- LORD, ABBETT & CO. LLC$108M
- Pertento Partners LLP$46M
- ALPINE ASSOCIATES MANAGEMENT INC.$13M
- Susquehanna Portfolio Strategies, LLC$9M
- PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO$9M
Largest adds
- FMR LLC$381M
- Invesco Ltd.$334M
- HAWK RIDGE CAPITAL MANAGEMENT LP$207M
- Driehaus Capital Management LLC$205M
- TWO SIGMA INVESTMENTS, LP$203M
- REINHART PARTNERS, LLC.$174M
Largest trims
- Man Group plc$57M
- Kite Lake Capital Management (UK) LLP$38M
- FRONTIER CAPITAL MANAGEMENT CO LLC$30M
- CastleKnight Management LP$16M
- SCHRODER INVESTMENT MANAGEMENT GROUP$14M
- Strategic Wealth Partners, Ltd.$9M
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 |
|---|---|---|---|---|
| FMR LLC trimmed | 2,277,824 | $759M | 10.5% | 2026-Q2 |
| Invesco Ltd. added | 1,142,437 | $381M | 5.2% | 2026-Q2 |
| ALKEON CAPITAL MANAGEMENT LLC new | 1,100,000 | $367M | 5.1% | 2026-Q2 |
| HAWK RIDGE CAPITAL MANAGEMENT LP trimmed | 1,015,215 | $338M | 4.7% | 2026-Q2 |
| REINHART PARTNERS, LLC. trimmed | 966,060 | $322M | 4.4% | 2026-Q2 |
| Polar Capital Holdings Plc new | 931,375 | $310M | 4.3% | 2026-Q2 |
| Driehaus Capital Management LLC added | 786,074 | $262M | 3.6% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 701,105 | $234M | 3.2% | 2026-Q2 |
| Wolf Hill Capital Management, LP trimmed | 548,791 | $183M | 2.5% | 2026-Q2 |
| Bahl & Gaynor LLC added | 453,307 | $151M | 2.1% | 2026-Q2 |
| Granahan Investment Management, LLC added | 445,752 | $149M | 2.0% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC trimmed | 435,931 | $145M | 2.0% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 417,894 | $139M | 1.9% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 363,105 | $121M | 1.7% | 2026-Q2 |
| Analog Century Management LP trimmed | 362,502 | $121M | 1.7% | 2026-Q2 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP trimmed | 354,216 | $118M | 1.6% | 2026-Q2 |
| BIT Capital GmbH new | 349,195 | $116M | 1.6% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 316,350 | $105M | 1.5% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. trimmed | 299,699 | $100M | 1.4% | 2026-Q2 |
| MARSHALL WACE, LLP added | 291,836 | $97M | 1.3% | 2026-Q2 |
| MORGAN STANLEY added | 291,727 | $97M | 1.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 276,785 | $92M | 1.3% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 275,122 | $92M | 1.3% | 2026-Q2 |
| SCHWARTZ INVESTMENT COUNSEL INC trimmed | 270,000 | $90M | 1.2% | 2026-Q2 |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC trimmed | 261,815 | $87M | 1.2% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 204,951 | $69M | 0.9% | 2026-Q2 |
| HIGHLAND PEAK CAPITAL, LLC trimmed | 202,857 | $68M | 0.9% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 200,346 | $67M | 0.9% | 2026-Q2 |
| Boston Partners trimmed | 199,201 | $66M | 0.9% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 193,382 | $22M | 0.3% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 185,251 | $62M | 0.9% | 2026-Q2 |
| FengHe Fund Management Pte. Ltd. new | 181,482 | $60M | 0.8% | 2026-Q2 |
| UBS Group AG trimmed | 180,420 | $60M | 0.8% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 179,946 | $60M | 0.8% | 2026-Q2 |
| Apis Capital Advisors, LLC trimmed | 178,400 | $59M | 0.8% | 2026-Q2 |
| NEUMEIER POMA INVESTMENT COUNSEL LLC trimmed | 176,408 | $59M | 0.8% | 2026-Q2 |
| Ophir Asset Management Pty Ltd trimmed | 174,335 | $58M | 0.8% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 161,432 | $54M | 0.7% | 2026-Q2 |
| HERALD INVESTMENT MANAGEMENT Ltd trimmed | 147,700 | $49M | 0.7% | 2026-Q2 |
| AIGH Capital Management LLC trimmed | 144,000 | $48M | 0.7% | 2026-Q2 |
| SEI INVESTMENTS CO added | 142,327 | $47M | 0.7% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 138,433 | $46M | 0.6% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 129,537 | $43M | 0.6% | 2026-Q2 |
| First Eagle Investment Management, LLC trimmed | 125,737 | $42M | 0.6% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL added | 125,176 | $42M | 0.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 124,696 | $42M | 0.6% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 124,077 | $41M | 0.6% | 2026-Q2 |
| HEARTLAND ADVISORS INC trimmed | 123,895 | $41M | 0.6% | 2026-Q2 |
| Ratan Capital Management LP new | 117,623 | $39M | 0.5% | 2026-Q2 |
| Tidal Investments LLC added | 116,620 | $39M | 0.5% | 2026-Q2 |
| KNIGHTSBRIDGE ASSET MANAGEMENT, LLC added | 114,282 | $38M | 0.5% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 111,780 | $37M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 110,710 | $37M | 0.5% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP new | 106,466 | $35M | 0.5% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. new | 105,946 | $35M | 0.5% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 102,519 | $34M | 0.5% | 2026-Q2 |
| Ma Investment Partnership, LP new | 100,000 | $33M | 0.5% | 2026-Q2 |
| Stephens Investment Management Group LLC new | 99,098 | $33M | 0.5% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC trimmed | 96,303 | $32M | 0.4% | 2026-Q2 |
| Walleye Trading LLC added | 88,015 | $29M | 0.4% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 75,849 | $25M | 0.3% | 2026-Q2 |
| BlackRock, Inc. added | 75,746 | $25M | 0.3% | 2026-Q2 |
| Ceredex Value Advisors LLC new | 73,700 | $25M | 0.3% | 2026-Q2 |
| STATE STREET CORP trimmed | 73,401 | $24M | 0.3% | 2026-Q2 |
| Bank of New York Mellon Corp added | 70,280 | $23M | 0.3% | 2026-Q2 |
| SG Capital Management LLC trimmed | 66,027 | $22M | 0.3% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 64,438 | $21M | 0.3% | 2026-Q2 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 61,996 | $21M | 0.3% | 2026-Q2 |
| CastleKnight Management LP trimmed | 61,475 | $20M | 0.3% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 60,600 | $20M | 0.3% | 2026-Q2 |
| Jump Financial, LLC added | 59,818 | $20M | 0.3% | 2026-Q2 |
| M&G PLC trimmed | 58,576 | $20M | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 57,449 | $19M | 0.3% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 56,760 | $19M | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 54,681 | $18M | 0.3% | 2026-Q2 |
| THAMES CAPITAL MANAGEMENT LLC added | 52,823 | $18M | 0.2% | 2026-Q2 |
| Hood River Capital Management LLC new | 52,591 | $18M | 0.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 52,011 | $17M | 0.2% | 2026-Q2 |
| Trexquant Investment LP added | 51,863 | $17M | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 50,853 | $17M | 0.2% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 44,923 | $15M | 0.2% | 2026-Q2 |
| BERKSHIRE CAPITAL HOLDINGS INC new | 44,280 | $15M | 0.2% | 2026-Q2 |
| KORNITZER CAPITAL MANAGEMENT INC /KS | 42,985 | $14M | 0.2% | 2026-Q2 |
| UNICOM Systems, Inc. new | 41,200 | $14M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 40,490 | $13M | 0.2% | 2026-Q2 |
| Melqart Asset Management (UK) Ltd trimmed | 38,828 | $13M | 0.2% | 2026-Q2 |
| Kite Lake Capital Management (UK) LLP trimmed | 37,705 | $13M | 0.2% | 2026-Q2 |
| Prospect Capital Advisors, LLC trimmed | 36,660 | $12M | 0.2% | 2026-Q2 |
| ABN AMRO INVESTMENT SOLUTIONS trimmed | 36,600 | $12M | 0.2% | 2026-Q2 |
| Emerald Investment Advisers, LLC trimmed | 36,442 | $12M | 0.2% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO trimmed | 35,330 | $12M | 0.2% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ added | 35,217 | $12M | 0.2% | 2026-Q2 |
| Skylands Capital, LLC trimmed | 34,214 | $11M | 0.2% | 2026-Q2 |
| VAN ECK ASSOCIATES CORP added | 33,998 | $11M | 0.2% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 32,825 | $11M | 0.2% | 2026-Q2 |
| Ramirez Asset Management, Inc. added | 32,527 | $11M | 0.1% | 2026-Q2 |
| Calamos Advisors LLC added | 32,260 | $11M | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 30,687 | $10M | 0.1% | 2026-Q2 |
| NAVELLIER & ASSOCIATES INC new | 28,019 | $9M | 0.1% | 2026-Q2 |
| OVERSEA-CHINESE BANKING Corp Ltd trimmed | 25,724 | $9M | 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.