COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

Westerkirk Capital Inc.'s Holding History (CIK: 0002080423)

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

Q4 2025

Shares 12,600 Value ($000) $847 Avg Close $70.84 Range $62.00 - $85.24

Q3 2025

Shares 11,700 Value ($000) $987 Avg Close $88.37 Range $79.94 - $97.43

Q2 2025

Shares 11,700 Value ($000) $941 Avg Close $77.90 Range $71.21 - $83.68

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	12,600	$847	$70.84	$62.00 - $85.24
Q3 2025	11,700	$987	$88.37	$79.94 - $97.43
Q2 2025	11,700	$941	$77.90	$71.21 - $83.68