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Granahan Investment Management’s Silicon Motion SIMO Stock Holding History

Granahan Investment 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 		$149M Buy
445,752
+250,500
+128% +$58M 5.29% 2
2026
Q1 		$21.9M Sell
195,252
-33,877
-15% -$4.11M 1.06% 27
2025
Q4 		$21.2M Buy
229,129
+21,371
+10% +$1.96M 0.91% 33
2025
Q3 		$19.7M Buy
207,758
+77,667
+60% +$6.17M 0.81% 36
2025
Q2 		$9.78M Buy
+130,091
New +$7.39M 0.4% 65
2024
Q4 		– Sell
-66,933
Closed -$4.07M – 202
2024
Q3 		$4.07M Sell
66,933
-118,675
-64% -$7.82M 0.16% 140
2024
Q2 		$15M Sell
185,608
-30,092
-14% -$2.35M 0.6% 50
2024
Q1 		$16.6M Buy
+215,700
New +$14.7M 0.58% 55
2022
Q2 		– Sell
-143,273
Closed -$9.57M – 187
2022
Q1 		$9.57M Sell
143,273
-26,927
-16% -$2.1M 0.24% 94
2021
Q4 		$16.2M Sell
170,200
-19,326
-10% -$1.46M 0.33% 85
2021
Q3 		$13.1M Buy
189,526
+42,831
+29% +$3.02M 0.25% 96
2021
Q2 		$9.4M Buy
146,695
+15,902
+12% +$1.05M 0.18% 118
2021
Q1 		$7.77M Buy
+130,793
New +$7.44M 0.16% 111

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

Granahan Investment Management's SIMO Position: Q2 2026 in Review

Granahan Investment Management increased its Silicon Motion (SIMO) stake by 128% in Q2 2026, buying an estimated $58M and bringing the position to 445,752 shares worth $149M. The position accounts for 5.29% of the portfolio, ranked #2.

Granahan Investment Management first reported a position in SIMO in Q1 2021 and has held it in 13 quarters since. 385 funds tracked by Wall St. Rank hold SIMO as of Q2 2026.

  • Granahan Investment Management held 445,752 shares of Silicon Motion worth $149M as of Q2 2026.
  • Granahan Investment Management bought 250,500 Silicon Motion shares in Q2 2026, an estimated $58M.
  • Silicon Motion made up 5.29% of Granahan Investment Management's portfolio in Q2 2026, its #2 holding.
  • Granahan Investment Management first reported a position in Silicon Motion in Q1 2021 and has held it in 13 quarters since.
  • 385 funds tracked by Wall St. Rank held Silicon Motion as of Q2 2026.

Based on Granahan Investment Management's 13F filing for Q2 2026, filed 14 Aug 2026.