COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

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

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

Q4 2025
Shares 19,737 Value ($000) $1,327 Avg Close $70.84 Range $62.00 - $85.24
Q3 2025
Shares 1,061 Value ($000) $90 Avg Close $88.37 Range $79.94 - $97.43
Q1 2025
Shares 3,264 Value ($000) $259 Avg Close $76.08 Range $68.41 - $83.03
Q4 2024
Shares 6,886 Value ($000) $493 Avg Close $75.52 Range $68.26 - $82.49
Q4 2021
Shares 4,263 Value ($000) $337 Avg Close $83.91 Range $75.09 - $101.05
Q1 2021
Shares 581 Value ($000) $478 Avg Close $86.33 Range $74.31 - $95.28
Q4 2020
Shares 200 Value ($000) $185 Avg Close $87.68 Range $78.10 - $95.12