Boston Partners
SIMO icon

Boston Partners’s Silicon Motion SIMO Stock Holding History

Boston Partners’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 		$66.4M Sell
199,201
-73,596
-27% -$17.1M 0.06% 248
2026
Q1 		$30.6M Sell
272,797
-111,004
-29% -$13.5M 0.03% 321
2025
Q4 		$35.6M Sell
383,801
-155,615
-29% -$14.3M 0.04% 303
2025
Q3 		$51.1M Sell
539,416
-196,181
-27% -$15.6M 0.05% 259
2025
Q2 		$55.3M Buy
735,597
+183,458
+33% +$10.4M 0.06% 245
2025
Q1 		$27.9M Buy
552,139
+240,737
+77% +$13M 0.03% 288
2024
Q4 		$16.8M Buy
311,402
+100,033
+47% +$5.6M 0.02% 345
2024
Q3 		$12.8M Buy
211,369
+200,209
+1,794% +$13.2M 0.02% 379
2024
Q2 		$904K Buy
11,160
+3,264
+41% +$255K ﹤0.01% 600
2024
Q1 		$608K Sell
7,896
-149
-2% -$10.2K ﹤0.01% 663
2023
Q4 		$493K Buy
+8,045
New +$460K ﹤0.01% 611
2022
Q3 		– Sell
-10,008
Closed -$6K – 755
2022
Q2 		$6K Buy
+10,008
New +$843K ﹤0.01% 706
2017
Q3 		– Sell
-65,476
Closed -$3.16M – 780
2017
Q2 		$3.16M Sell
65,476
-43,023
-40% -$2.13M ﹤0.01% 581
2017
Q1 		$5.07M Buy
+108,499
New +$4.61M 0.01% 496

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

Boston Partners's SIMO Position: Q2 2026 in Review

Boston Partners reduced its Silicon Motion (SIMO) stake by 27% in Q2 2026, selling an estimated $17.1M and leaving 199,201 shares worth $66.4M. The position accounts for 0.06% of the portfolio, ranked #248.

Boston Partners first reported a position in SIMO in Q1 2017 and has held it in 14 quarters since. 385 funds tracked by Wall St. Rank hold SIMO as of Q2 2026.

  • Boston Partners held 199,201 shares of Silicon Motion worth $66.4M as of Q2 2026.
  • Boston Partners sold 73,596 Silicon Motion shares in Q2 2026, an estimated $17.1M.
  • Silicon Motion made up 0.06% of Boston Partners's portfolio in Q2 2026, its #248 holding.
  • Boston Partners first reported a position in Silicon Motion in Q1 2017 and has held it in 14 quarters since.
  • 385 funds tracked by Wall St. Rank held Silicon Motion as of Q2 2026.

Based on Boston Partners's 13F filing for Q2 2026, filed 4 Aug 2026.