BLACKLINE INC

Ticker: BL CUSIP: 09239B109 Class: Common Stock

Select Equity Group, L.P.'s Holding History (CIK: 0001592643)

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

Q4 2025

Shares 274,540 Value ($000) $15,179 Avg Close $55.08 Range $48.74 - $59.57

Q3 2025

Shares 267,022 Value ($000) $14,179 Avg Close $54.03 Range $47.94 - $58.32

Q2 2025

Shares 209,711 Value ($000) $11,874 Avg Close $51.65 Range $40.82 - $59.43

Q1 2025

Shares 98,506 Value ($000) $4,770 Avg Close $54.76 Range $46.88 - $66.25

Q4 2024

Shares 21,862 Value ($000) $1,328 Avg Close $59.63 Range $53.55 - $65.10

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	274,540	$15,179	$55.08	$48.74 - $59.57
Q3 2025	267,022	$14,179	$54.03	$47.94 - $58.32
Q2 2025	209,711	$11,874	$51.65	$40.82 - $59.43
Q1 2025	98,506	$4,770	$54.76	$46.88 - $66.25
Q4 2024	21,862	$1,328	$59.63	$53.55 - $65.10