WESTFIELD CAPITAL MANAGEMENT CO LP
Position in SIMO — Silicon Motion Technology CORP
CIK 1177719
BOSTON, MA
Position in SIMO
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$35,488,311
+$6,689,439 QoQ
Shares Held
106,466
-71.6% QoQ
Ownership
0.314%
of shares outstanding
% of Portfolio
0.12%
of 13F equity value
Holder Rank
#55
of 383 holders
Holding Since
Jun 2020
15 quarters on record
Voting authority
Sole 95%
Shared 0%
None 5%
Common Shares in SIMO Over Time
Shares Held
Position Value (USD)
Position in Semiconductors
Technology · as of Jun 30, 2026WESTFIELD CAPITAL MANAGEMENT CO LP holds $3,892,895,572 across 19 Semiconductors names. SIMO ranks #17 (0.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | NVDA |
Nvidia Corp
|
8,079,926 | $1,616,712,393 | |
| 2 | AVGO |
Broadcom Inc.
|
1,556,522 | $587,976,185 | |
| 3 | MU |
Micron Technology Inc
|
228,203 | $263,412,440 | |
| 4 | TSM |
Taiwan Semiconductor Manufacturing Co Ltd
|
510,999 | $244,037,792 | |
| 5 | AMD |
Advanced Micro Devices Inc
|
403,081 | $234,153,783 | |
| 6 | SMTC |
Semtech Corp
|
1,133,268 | $183,419,425 | |
| 7 | MCHP |
Microchip Technology Inc
|
1,639,111 | $149,486,923 | |
| 8 | ALAB |
Astera Labs, Inc.
|
249,299 | $120,416,402 |
All Filings in SIMO
Export CSV
15 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $35,488,311 | 106,466 | Shares | Sole | 2026-08-12 | |
| 2024-03-31 | $28,798,872 | 374,303 | Shares | Sole | 2024-05-10 | |
| 2023-12-31 | $25,007,289 | 408,149 | Shares | Sole | 2024-02-09 | |
| 2023-06-30 | $1,700,926 | 23,670 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $1,550,858 | 23,670 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $1,538,313 | 23,670 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $7,570,188 | 116,125 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $31,200,012 | 372,760 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $71,524,061 | 1,070,399 | Shares | Sole | 2022-05-16 | |
| 2021-09-30 | $71,790,866 | 1,040,749 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $94,754,671 | 1,478,232 | Shares | Sole | 2021-08-10 | |
| 2021-03-31 | $86,239,803 | 1,452,093 | Shares | Sole | 2021-05-14 | |
| 2020-12-31 | $45,603,779 | 947,119 | Shares | Sole | 2021-02-12 | |
| 2020-09-30 | $24,331,302 | 644,026 | Shares | Sole | 2020-11-13 | |
| 2020-06-30 | $20,490,179 | 420,139 | Shares | Sole | 2020-08-13 | |
| No filing history on record for this holder in this stock. | ||||||