William Blair & Company
SMWB icon

William Blair & Company’s Similarweb SMWB Stock Holding History

William Blair & Company’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
-71,044
Closed -$532K – 2000
2025
Q4 		$532K Sell
71,044
-31,579
-31% -$255K ﹤0.01% 1124
2025
Q3 		$954K Sell
102,623
-5,460
-5% -$48.9K ﹤0.01% 929
2025
Q2 		$847K Buy
108,083
+20,688
+24% +$155K ﹤0.01% 945
2025
Q1 		$723K Sell
87,395
-10,458
-11% -$129K ﹤0.01% 972
2024
Q4 		$1.39M Buy
97,853
+72,674
+289% +$803K ﹤0.01% 808
2024
Q3 		$223K Buy
25,179
+3,607
+17% +$28.5K ﹤0.01% 1399
2024
Q2 		$168K Sell
21,572
-90
-0.4% -$701 ﹤0.01% 1447
2024
Q1 		$195K Buy
21,662
+3,621
+20% +$26.8K ﹤0.01% 1411
2023
Q4 		$96.2K Sell
18,041
-126,995
-88% -$665K ﹤0.01% 1511
2023
Q3 		$940K Sell
145,036
-46,764
-24% -$306K ﹤0.01% 861
2023
Q2 		$1.26M Sell
191,800
-48,544
-20% -$295K ﹤0.01% 775
2023
Q1 		$1.62M Sell
240,344
-46,121
-16% -$295K 0.01% 704
2022
Q4 		$1.84M Sell
286,465
-83,001
-22% -$475K 0.01% 655
2022
Q3 		$2.17M Buy
369,466
+55,919
+18% +$463K 0.01% 603
2022
Q2 		$2.59M Buy
313,547
+3,684
+1% +$38.9K 0.01% 573
2022
Q1 		$4.01M Buy
309,863
+1,502
+0.5% +$21.4K 0.01% 522
2021
Q4 		$5.52M Buy
+308,361
New +$5.66M 0.02% 460

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

William Blair & Company's SMWB Position: Q1 2026 in Review

William Blair & Company sold out of Similarweb (SMWB) in Q1 2026, closing a stake of 71,044 shares — an estimated $532K sold.

William Blair & Company first reported a position in SMWB in Q4 2021 and held it in 17 quarters. The position peaked at $5.52M in Q4 2021. 80 funds tracked by Wall St. Rank hold SMWB as of Q1 2026.

  • William Blair & Company reported no remaining Similarweb position as of Q1 2026 after selling out during the quarter.
  • William Blair & Company sold 71,044 Similarweb shares in Q1 2026, an estimated $532K.
  • William Blair & Company first reported a position in Similarweb in Q4 2021 and held it in 17 quarters.
  • William Blair & Company's Similarweb position peaked at $5.52M in Q4 2021.
  • 80 funds tracked by Wall St. Rank held Similarweb as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.