PEGASYSTEMS INC

Ticker: PEGA CUSIP: 705573103 Class: Common Stock

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q4 2021

Shares 1,189,235 Value ($000) $132,980 Avg Close $59.21 Range $50.60 - $65.88

Q3 2021

Shares 1,264,248 Value ($000) $160,686 Avg Close $66.53 Range $62.23 - $71.28

Q2 2021

Shares 1,281,078 Value ($000) $178,313 Avg Close $63.04 Range $57.17 - $71.83

Q1 2021

Shares 981,383 Value ($000) $112,211 Avg Close $65.38 Range $54.53 - $74.40

Q2 2018

Shares 5,770 Value ($000) $316 Avg Close $30.65 Range $26.60 - $33.98

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2021	1,189,235	$132,980	$59.21	$50.60 - $65.88
Q3 2021	1,264,248	$160,686	$66.53	$62.23 - $71.28
Q2 2021	1,281,078	$178,313	$63.04	$57.17 - $71.83
Q1 2021	981,383	$112,211	$65.38	$54.53 - $74.40
Q2 2018	5,770	$316	$30.65	$26.60 - $33.98