Who owns Silicon Motion Technology Corporation?
Institutional ownership of SIMO from SEC Form 13F filings across 246 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
246
13F holders
$3.75B
value, 2026 filers
39.4%
of shares outstanding (13.2M sh)
85
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of SIMO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 2.3M | $759.3M | 0.0% | 6.8% | -33.0% |
| 2 | ACADIAN ASSET MANAGEMENT LLC | 1.3M | $438,527 | 0.5% | 3.9% | +1.7% |
| 3 | Invesco Ltd. | 1.1M | $380.8M | 0.0% | 3.4% | +173.1% |
| 4 | TWO SIGMA INVESTMENTS, LP | 701,105 | $233.7M | 0.2% | 2.1% | +155.3% |
| 5 | LAZARD ASSET MANAGEMENT LLC | 435,931 | $145.3M | 0.2% | 1.3% | -44.3% |
| 6 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 417,894 | $139.3M | 0.1% | 1.2% | -1.8% |
| 7 | LORD, ABBETT & CO. LLC | 377,899 | $125,965 | 0.4% | 1.1% | -60.7% |
| 8 | D. E. Shaw & Co., Inc.NEW | 363,105 | $121.0M | 0.1% | 1.1% | new |
| 9 | Robeco Institutional Asset Management B.V. | 299,699 | $99.9M | 0.1% | 0.9% | -52.5% |
| 10 | MARSHALL WACE, LLP | 291,836 | $97.3M | 0.1% | 0.9% | +5.5% |
| 11 | MORGAN STANLEY | 291,727 | $97.2M | 0.0% | 0.9% | +38.3% |
| 12 | BANK OF AMERICA CORP /DE/ | 276,785 | $92.3M | 0.0% | 0.8% | +13.3% |
| 13 | VOYA INVESTMENT MANAGEMENT LLC | 275,122 | $91.7M | 0.1% | 0.8% | -28.0% |
| 14 | SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | 261,815 | $87.3M | 1.5% | 0.8% | -42.6% |
| 15 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 204,951 | $68.7M | 0.0% | 0.6% | -2.5% |
| 16 | Russell Investments Group, Ltd. | 200,346 | $66.6M | 0.1% | 0.6% | -1.5% |
| 17 | ALLIANCEBERNSTEIN L.P.NEW | 193,382 | $21.7M | 0.0% | 0.6% | new |
| 18 | WELLINGTON MANAGEMENT GROUP LLP | 185,251 | $61.7M | 0.0% | 0.6% | -39.1% |
| 19 | UBS Group AG | 180,420 | $60.1M | 0.0% | 0.5% | -54.0% |
| 20 | MILLENNIUM MANAGEMENT LLC | 179,946 | $60.0M | 0.0% | 0.5% | -54.5% |
| 21 | SEI INVESTMENTS CO | 142,327 | $47.4M | 0.0% | 0.4% | +30.5% |
| 22 | Qube Research & Technologies Ltd | 138,433 | $46.1M | 0.0% | 0.4% | -60.6% |
| 23 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 129,537 | $43.2M | 0.0% | 0.4% | -17.8% |
| 24 | BLAIR WILLIAM & CO/IL | 125,176 | $41.7M | 0.1% | 0.4% | +21.3% |
| 25 | GOLDMAN SACHS GROUP INC | 124,696 | $41.6M | 0.0% | 0.4% | +341.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.