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	$604K	Buy	231,266 +45,058	+24%	+$188K	﹤0.01%	7605
2025 Q4	$1.39M	Buy	186,208 +34,086	+22%	+$275K	﹤0.01%	5461
2025 Q3	$1.41M	Buy	152,122 +99,853	+191%	+$894K	﹤0.01%	5587
2025 Q2	$410K	Buy	52,269 +35,210	+206%	+$264K	﹤0.01%	7304
2025 Q1	$141K	Buy	+17,059	New	+$210K	﹤0.01%	8645
2024 Q3	–	Sell	-10,690	Closed	-$83.1K	–	10344
2024 Q2	$83.1K	Sell	10,690 -10,233	-49%	-$79.7K	﹤0.01%	8801
2024 Q1	$188K	Buy	+20,923	New	+$155K	﹤0.01%	8222
2022 Q1	–	Sell	-11,432	Closed	-$205K	–	10972
2021 Q4	$205K	Buy	+11,432	New	+$210K	﹤0.01%	8791

Other funds holding SMWB

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

Ulysses Management New York $802M AUM 5.35% 1-Year Est. Return

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

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 New York $240B AUM 35.51% 1-Year Est. Return

Jane Street's SMWB Position: Q1 2026 in Review

Jane Street increased its Similarweb (SMWB) stake by 24% in Q1 2026, buying an estimated $188K and bringing the position to 231,266 shares worth $604K. The position accounts for ﹤0.01% of the portfolio, ranked #7605.

Jane Street first reported a position in SMWB in Q4 2021 and has held it in 8 quarters since. The position peaked at $1.41M in Q3 2025. 79 funds tracked by Wall St. Rank hold SMWB as of Q1 2026.

Jane Street held 231,266 shares of Similarweb worth $604K as of Q1 2026.
Jane Street bought 45,058 Similarweb shares in Q1 2026, an estimated $188K.
Similarweb made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #7605 holding.
Jane Street first reported a position in Similarweb in Q4 2021 and has held it in 8 quarters since.
Jane Street's Similarweb position peaked at $1.41M in Q3 2025.
79 funds tracked by Wall St. Rank held Similarweb as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.