Jane Street
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Jane Street’s Similarweb SMWB Stock Holding History

Jane Street’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
-133,800
Closed -$1M – 12891
2025
Q4 		$1M Sell
133,800
-210,000
-61% -$1.69M ﹤0.01% 6113
2025
Q3 		$3.2M Buy
343,800
+236,300
+220% +$2.12M ﹤0.01% 4110
2025
Q2 		$843K Buy
107,500
+48,600
+83% +$364K ﹤0.01% 5943
2025
Q1 		$487K Buy
+58,900
New +$726K ﹤0.01% 6909

Other funds holding SMWB

N
Naspers South Africa $84.4M AUM 76.38% 1-Year Est. Return
MMH
Menora Mivtachim Holdings Ramat Gan, Israel $25.6B AUM 50.04% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
ICP
ION Crossover Partners Herzliya Pituach, Israel $74.7M AUM
UM
Ulysses Management New York $506M AUM 8.58% 1-Year Est. Return
SST
S Squared Technology New York $322M AUM 92.75% 1-Year Est. Return
SSA
Schonfeld Strategic Advisors New York $27.9B AUM 51.18% 1-Year Est. Return
YDMI
Y.D. More Investments Ramat Gan, Israel $3.21B AUM 117.29% 1-Year Est. Return
AIM
ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

Jane Street's SMWB Position: Q2 2026 in Review

Jane Street increased its Similarweb (SMWB) stake by 122% in Q2 2026, buying an estimated $1.03M and bringing the position to 513,277 shares worth $3.15M. The position accounts for ﹤0.01% of the portfolio, ranked #4435.

Jane Street first reported a position in SMWB in Q4 2021 and has held it in 9 quarters since. 69 funds tracked by Wall St. Rank hold SMWB as of Q2 2026.

  • Jane Street held 513,277 shares of Similarweb worth $3.15M as of Q2 2026.
  • Jane Street bought 282,011 Similarweb shares in Q2 2026, an estimated $1.03M.
  • Similarweb made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #4435 holding.
  • Jane Street first reported a position in Similarweb in Q4 2021 and has held it in 9 quarters since.
  • 69 funds tracked by Wall St. Rank held Similarweb as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.