Westfield Capital Management
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Westfield Capital Management’s Silicon Motion SIMO Stock Holding History

Westfield Capital Management’s Portfolio SIMO Stock Details SIMO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$35.5M Buy
+106,466
New +$24.7M 0.12% 193
2024
Q2 		– Sell
-374,303
Closed -$28.8M – 271
2024
Q1 		$28.8M Sell
374,303
-33,846
-8% -$2.31M 0.15% 178
2023
Q4 		$25M Buy
+408,149
New +$23.3M 0.15% 177
2023
Q3 		– Sell
-23,670
Closed -$1.7M – 248
2023
Q2 		$1.7M Hold
23,670
– – 0.01% 210
2023
Q1 		$1.55M Hold
23,670
– – 0.01% 209
2022
Q4 		$1.54M Sell
23,670
-92,455
-80% -$5.67M 0.01% 202
2022
Q3 		$7.57M Sell
116,125
-256,635
-69% -$20.1M 0.06% 184
2022
Q2 		$31.2M Sell
372,760
-697,639
-65% -$58.8M 0.25% 138
2022
Q1 		$71.5M Buy
1,070,399
+81,168
+8% +$6.33M 0.46% 77
2021
Q4 		$94M Sell
989,231
-51,518
-5% -$3.88M 0.56% 59
2021
Q3 		$71.8M Sell
1,040,749
-437,483
-30% -$30.9M 0.43% 81
2021
Q2 		$94.8M Buy
1,478,232
+26,139
+2% +$1.72M 0.57% 59
2021
Q1 		$86.2M Buy
1,452,093
+504,974
+53% +$28.7M 0.54% 65
2020
Q4 		$45.6M Buy
947,119
+303,093
+47% +$12.4M 0.27% 126
2020
Q3 		$24.3M Buy
644,026
+223,887
+53% +$8.97M 0.16% 162
2020
Q2 		$20.5M Buy
+420,139
New +$18.6M 0.14% 172
2015
Q2 		– Sell
-321,493
Closed -$8.64M – 308
2015
Q1 		$8.64M Buy
+321,493
New +$8.78M 0.05% 236

Other funds holding SIMO

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Alkeon Capital Management
Alkeon Capital Management New York $74.1B AUM 71.18% 1-Year Est. Return
HRCM
Hawk Ridge Capital Management Los Angeles, California $3.12B AUM 53.42% 1-Year Est. Return
RP
Reinhart Partners Mequon, Wisconsin $4.38B AUM 55.55% 1-Year Est. Return
PCH
Polar Capital Holdings London, United Kingdom $42.4B AUM 181.11% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
WHCM
Wolf Hill Capital Management Greenwich, Connecticut $1.2B AUM 137.35% 1-Year Est. Return

Westfield Capital Management's SIMO Position: Q2 2026 in Review

Westfield Capital Management opened a new position in Silicon Motion (SIMO) in Q2 2026: 106,466 shares worth $35.5M. The stake represents 0.12% of the portfolio and ranks #193 among its holdings. This is a return to the name: Westfield Capital Management previously reported a position in SIMO as recently as Q1 2024.

Westfield Capital Management first reported a position in SIMO in Q1 2015 and has held it in 17 quarters since. The position peaked at $94.8M in Q2 2021. 385 funds tracked by Wall St. Rank hold SIMO as of Q2 2026.

  • Westfield Capital Management held 106,466 shares of Silicon Motion worth $35.5M as of Q2 2026.
  • Silicon Motion was a new Westfield Capital Management position in Q2 2026.
  • Silicon Motion made up 0.12% of Westfield Capital Management's portfolio in Q2 2026, its #193 holding.
  • Westfield Capital Management first reported a position in Silicon Motion in Q1 2015 and has held it in 17 quarters since.
  • Westfield Capital Management's Silicon Motion position peaked at $94.8M in Q2 2021.
  • 385 funds tracked by Wall St. Rank held Silicon Motion as of Q2 2026.

Based on Westfield Capital Management's 13F filing for Q2 2026, filed 12 Aug 2026.