CONSENSUS CLOUD SOLUTIONS IN

Ticker: CCSI CUSIP: 20848V105 Class: Common Stock

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

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

Q4 2025

Shares 11,497 Value ($000) $251 Avg Close $24.62 Range $20.20 - $30.00

Q1 2024

Shares 10 Value ($000) $0 Avg Close $17.92 Range $12.61 - $26.23

Q4 2023

Shares 271 Value ($000) $7 Avg Close $23.47 Range $18.33 - $28.09

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	11,497	$251	$24.62	$20.20 - $30.00
Q1 2024	10	$0	$17.92	$12.61 - $26.23
Q4 2023	271	$7	$23.47	$18.33 - $28.09