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Portolan Capital Management’s Similarweb SMWB Stock Holding History

Portolan Capital Management’s Portfolio SMWB Stock Details SMWB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-492,861
Closed -$3.69M – 172
2025
Q4 		$3.69M Sell
492,861
-686,139
-58% -$5.53M 0.2% 116
2025
Q3 		$11M Buy
1,179,000
+451,408
+62% +$4.04M 0.59% 57
2025
Q2 		$5.7M Buy
727,592
+357,401
+97% +$2.68M 0.36% 78
2025
Q1 		$3.06M Buy
370,191
+87,288
+31% +$1.08M 0.23% 91
2024
Q4 		$4.01M Buy
+282,903
New +$3.13M 0.27% 99
2024
Q3 		– Sell
-1,367,259
Closed -$10.6M – 147
2024
Q2 		$10.6M Sell
1,367,259
-673,343
-33% -$5.24M 0.87% 43
2024
Q1 		$18.4M Buy
2,040,602
+128,330
+7% +$948K 1.4% 25
2023
Q4 		$10.2M Sell
1,912,272
-636,360
-25% -$3.33M 0.89% 37
2023
Q3 		$16.5M Sell
2,548,632
-136,242
-5% -$891K 1.54% 19
2023
Q2 		$17.6M Buy
2,684,874
+385,800
+17% +$2.34M 1.56% 18
2023
Q1 		$15.5M Buy
2,299,074
+1,410,890
+159% +$9.03M 1.48% 19
2022
Q4 		$5.71M Buy
+888,184
New +$5.09M 0.57% 65

Other funds holding SMWB

N
Naspers South Africa $253M AUM 25.32% 1-Year Est. Return
MMH
Menora Mivtachim Holdings Ramat Gan, Israel $21.1B AUM 40.03% 1-Year Est. Return
YDMI
Y.D. More Investments Ramat Gan, Israel $2.55B AUM 104.35% 1-Year Est. Return
ICP
ION Crossover Partners Herzliya Pituach, Israel $36.9M AUM
UM
Ulysses Management New York $802M AUM 5.35% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
SST
S Squared Technology New York $264M AUM 73.25% 1-Year Est. Return
CP
CenterBook Partners Greenwich, Connecticut $1.86B AUM 24.52% 1-Year Est. Return
AFT
Alpha Family Trust Los Angeles, California $206M AUM 35.6% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Portolan Capital Management's SMWB Position: Q1 2026 in Review

Portolan Capital Management sold out of Similarweb (SMWB) in Q1 2026, closing a stake of 492,861 shares — an estimated $3.69M sold.

Portolan Capital Management first reported a position in SMWB in Q4 2022 and held it in 12 quarters. The position peaked at $18.4M in Q1 2024. 79 funds tracked by Wall St. Rank hold SMWB as of Q1 2026.

  • Portolan Capital Management reported no remaining Similarweb position as of Q1 2026 after selling out during the quarter.
  • Portolan Capital Management sold 492,861 Similarweb shares in Q1 2026, an estimated $3.69M.
  • Portolan Capital Management first reported a position in Similarweb in Q4 2022 and held it in 12 quarters.
  • Portolan Capital Management's Similarweb position peaked at $18.4M in Q1 2024.
  • 79 funds tracked by Wall St. Rank held Similarweb as of Q1 2026.

Based on Portolan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.