SIMILARWEB LTD

Ticker: SMWB CUSIP: M84137104 Class: Foreign Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 147,063 Value ($000) $1,102 Avg Close $8.06 Range $6.84 - $9.52

Q3 2025

Shares 41,169 Value ($000) $383 Avg Close $8.95 Range $6.85 - $10.75

Q2 2025

Shares 2,860 Value ($000) $22 Avg Close $7.49 Range $6.36 - $8.59

Q2 2022

Shares 65,200 Value ($000) $538 Avg Close $10.55 Range $7.60 - $14.49

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	147,063	$1,102	$8.06	$6.84 - $9.52
Q3 2025	41,169	$383	$8.95	$6.85 - $10.75
Q2 2025	2,860	$22	$7.49	$6.36 - $8.59
Q2 2022	65,200	$538	$10.55	$7.60 - $14.49