ILLUMINA INC

Ticker: ILMN CUSIP: 452327109 Class: COM

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

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

Q2 2021

Shares 923 Value ($000) $437 Avg Close $402.76 Range $358.04 - $473.74

Q1 2021

Shares 97,200 Value ($000) $37,331 Avg Close $407.75 Range $346.30 - $540.63

Q4 2020

Shares 96,803 Value ($000) $35,817 Avg Close $318.77 Range $280.17 - $368.03

Q3 2020

Shares 150,213 Value ($000) $46,428 Avg Close $344.57 Range $253.33 - $393.19

Q2 2020

Shares 207,000 Value ($000) $76,662 Avg Close $321.78 Range $244.30 - $367.51

Q1 2020

Shares 93,560 Value ($000) $25,553 Avg Close $279.63 Range $191.42 - $330.38

Q4 2019

Shares 69,782 Value ($000) $23,149 Avg Close $303.09 Range $272.14 - $327.46

Q3 2019

Shares 68,182 Value ($000) $20,742 Avg Close $294.76 Range $256.13 - $370.39

Q2 2019

Shares 67,852 Value ($000) $24,980 Avg Close $315.75 Range $292.17 - $358.95

Q1 2019

Shares 67,134 Value ($000) $20,858 Avg Close $291.63 Range $261.30 - $313.54

Q4 2018

Shares 46,624 Value ($000) $13,984 Avg Close $309.79 Range $263.62 - $361.78

Q3 2018

Shares 46,433 Value ($000) $17,044 Avg Close $320.46 Range $267.18 - $362.46

Q3 2016

Shares 6,765 Value ($000) $1,229 Avg Close $159.99 Range $129.04 - $177.69

Q2 2016

Shares 6,765 Value ($000) $950 Avg Close $142.06 Range $123.64 - $173.90

Q1 2016

Shares 6,765 Value ($000) $1,097 Avg Close $152.87 Range $126.82 - $183.12

Q4 2015

Shares 6,765 Value ($000) $1,299 Avg Close $161.39 Range $126.46 - $191.12

Q3 2015

Shares 6,765 Value ($000) $1,189 Avg Close $202.14 Range $156.82 - $235.77

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2021	923	$437	$402.76	$358.04 - $473.74
Q1 2021	97,200	$37,331	$407.75	$346.30 - $540.63
Q4 2020	96,803	$35,817	$318.77	$280.17 - $368.03
Q3 2020	150,213	$46,428	$344.57	$253.33 - $393.19
Q2 2020	207,000	$76,662	$321.78	$244.30 - $367.51
Q1 2020	93,560	$25,553	$279.63	$191.42 - $330.38
Q4 2019	69,782	$23,149	$303.09	$272.14 - $327.46
Q3 2019	68,182	$20,742	$294.76	$256.13 - $370.39
Q2 2019	67,852	$24,980	$315.75	$292.17 - $358.95
Q1 2019	67,134	$20,858	$291.63	$261.30 - $313.54
Q4 2018	46,624	$13,984	$309.79	$263.62 - $361.78
Q3 2018	46,433	$17,044	$320.46	$267.18 - $362.46
Q3 2016	6,765	$1,229	$159.99	$129.04 - $177.69
Q2 2016	6,765	$950	$142.06	$123.64 - $173.90
Q1 2016	6,765	$1,097	$152.87	$126.82 - $183.12
Q4 2015	6,765	$1,299	$161.39	$126.46 - $191.12
Q3 2015	6,765	$1,189	$202.14	$156.82 - $235.77