ILLUMINA INC

Ticker: ILMN CUSIP: 452327109 Class: COM

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

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

Q4 2025

Shares 1,989,679 Value ($000) $260,966 Avg Close $117.40 Range $88.00 - $138.80

Q3 2025

Shares 1,885,279 Value ($000) $179,045 Avg Close $99.18 Range $90.62 - $111.00

Q2 2025

Shares 1,958,499 Value ($000) $186,860 Avg Close $81.16 Range $68.70 - $96.83

Q1 2025

Shares 2,370,949 Value ($000) $188,111 Avg Close $108.24 Range $77.54 - $153.06

Q4 2024

Shares 2,455,819 Value ($000) $328,171 Avg Close $142.41 Range $125.06 - $156.66

Q3 2024

Shares 2,516,359 Value ($000) $328,158 Avg Close $123.37 Range $103.57 - $137.18

Q2 2024

Shares 2,428,760 Value ($000) $253,514 Avg Close $112.18 Range $97.36 - $134.76

Q1 2024

Shares 431,750 Value ($000) $59,288 Avg Close $134.04 Range $122.39 - $144.15

Q4 2023

Shares 407,325 Value ($000) $56,716 Avg Close $115.36 Range $86.58 - $140.01

Q3 2023

Shares 417,065 Value ($000) $57,255 Avg Close $164.42 Range $123.90 - $190.31

Q2 2023

Shares 457,548 Value ($000) $85,786 Avg Close $202.41 Range $176.67 - $227.06

Q1 2023

Shares 466,148 Value ($000) $108,403 Avg Close $204.65 Range $177.04 - $232.05

Q4 2022

Shares 520,393 Value ($000) $105,223 Avg Close $207.24 Range $174.85 - $242.09

Q3 2022

Shares 571,703 Value ($000) $109,075 Avg Close $197.84 Range $168.73 - $229.85

Q2 2022

Shares 605,308 Value ($000) $111,595 Avg Close $255.36 Range $175.10 - $361.05

Q1 2022

Shares 622,338 Value ($000) $217,445 Avg Close $337.77 Range $294.54 - $416.34

Q4 2021

Shares 664,558 Value ($000) $252,824 Avg Close $378.89 Range $331.74 - $413.42

Q3 2021

Shares 684,718 Value ($000) $277,728 Avg Close $459.88 Range $394.08 - $511.67

Q2 2021

Shares 712,848 Value ($000) $337,327 Avg Close $402.76 Range $358.04 - $473.74

Q1 2021

Shares 727,483 Value ($000) $279,397 Avg Close $407.75 Range $346.30 - $540.63

Q4 2020

Shares 791,818 Value ($000) $292,973 Avg Close $318.77 Range $280.17 - $368.03

Q3 2020

Shares 835,638 Value ($000) $258,279 Avg Close $344.57 Range $253.33 - $393.19

Q2 2020

Shares 871,698 Value ($000) $322,833 Avg Close $321.78 Range $244.30 - $367.51

Q1 2020

Shares 926,963 Value ($000) $253,172 Avg Close $279.63 Range $191.42 - $330.38

Q4 2019

Shares 948,783 Value ($000) $314,749 Avg Close $303.09 Range $272.14 - $327.46

Q3 2019

Shares 956,183 Value ($000) $290,890 Avg Close $294.76 Range $256.13 - $370.39

Q2 2019

Shares 980,933 Value ($000) $361,130 Avg Close $315.75 Range $292.17 - $358.95

Q1 2019

Shares 1,000,493 Value ($000) $310,843 Avg Close $291.63 Range $261.30 - $313.54

Q4 2018

Shares 1,008,263 Value ($000) $302,408 Avg Close $309.79 Range $263.62 - $361.78

Q3 2018

Shares 1,069,553 Value ($000) $392,590 Avg Close $320.46 Range $267.18 - $362.46

Q2 2018

Shares 1,126,843 Value ($000) $314,716 Avg Close $254.40 Range $219.67 - $285.17

Q1 2018

Shares 1,873,520 Value ($000) $442,938 Avg Close $229.19 Range $201.86 - $249.65

Q4 2017

Shares 1,887,360 Value ($000) $412,369 Avg Close $205.77 Range $192.81 - $224.44

Q3 2017

Shares 1,903,230 Value ($000) $379,123 Avg Close $186.17 Range $163.40 - $208.50

Q2 2017

Shares 2,035,420 Value ($000) $353,186 Avg Close $173.03 Range $162.61 - $184.32

Q1 2017

Shares 2,072,110 Value ($000) $353,585 Avg Close $157.56 Range $124.67 - $169.57

Q4 2016

Shares 2,079,730 Value ($000) $266,289 Avg Close $134.78 Range $116.12 - $181.79

Q3 2016

Shares 2,083,170 Value ($000) $378,429 Avg Close $159.99 Range $129.04 - $177.69

Q2 2016

Shares 2,139,920 Value ($000) $300,402 Avg Close $142.06 Range $123.64 - $173.90

Q1 2016

Shares 2,174,770 Value ($000) $352,552 Avg Close $152.87 Range $126.82 - $183.12

Q4 2015

Shares 2,174,180 Value ($000) $417,323 Avg Close $161.39 Range $126.46 - $191.12

Q3 2015

Shares 2,178,040 Value ($000) $382,943 Avg Close $202.14 Range $156.82 - $235.77

Q2 2015

Shares 2,239,397 Value ($000) $488,995 Avg Close $195.32 Range $173.81 - $217.00

Q1 2015

Shares 2,241,987 Value ($000) $416,202 Avg Close $188.35 Range $173.66 - $207.52

Q4 2014

Shares 2,241,847 Value ($000) $413,800 Avg Close $176.23 Range $141.17 - $191.99

Q3 2014

Shares 2,244,837 Value ($000) $367,974 Avg Close $167.17 Range $152.58 - $179.96

Q2 2014

Shares 2,252,780 Value ($000) $402,211 Avg Close $149.19 Range $124.21 - $175.88

Q1 2014

Shares 2,262,270 Value ($000) $336,309 Avg Close $146.95 Range $103.88 - $178.31

Q4 2013

Shares 2,048,063 Value ($000) $226,495 Avg Close $91.59 Range $70.79 - $111.87

Q3 2013

Shares 2,035,663 Value ($000) $164,543 Avg Close $76.50 Range $70.17 - $83.47

Q2 2013

Shares 2,028,200 Value ($000) $151,790 Avg Close $64.01 Range $52.31 - $75.01

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,989,679	$260,966	$117.40	$88.00 - $138.80
Q3 2025	1,885,279	$179,045	$99.18	$90.62 - $111.00
Q2 2025	1,958,499	$186,860	$81.16	$68.70 - $96.83
Q1 2025	2,370,949	$188,111	$108.24	$77.54 - $153.06
Q4 2024	2,455,819	$328,171	$142.41	$125.06 - $156.66
Q3 2024	2,516,359	$328,158	$123.37	$103.57 - $137.18
Q2 2024	2,428,760	$253,514	$112.18	$97.36 - $134.76
Q1 2024	431,750	$59,288	$134.04	$122.39 - $144.15
Q4 2023	407,325	$56,716	$115.36	$86.58 - $140.01
Q3 2023	417,065	$57,255	$164.42	$123.90 - $190.31
Q2 2023	457,548	$85,786	$202.41	$176.67 - $227.06
Q1 2023	466,148	$108,403	$204.65	$177.04 - $232.05
Q4 2022	520,393	$105,223	$207.24	$174.85 - $242.09
Q3 2022	571,703	$109,075	$197.84	$168.73 - $229.85
Q2 2022	605,308	$111,595	$255.36	$175.10 - $361.05
Q1 2022	622,338	$217,445	$337.77	$294.54 - $416.34
Q4 2021	664,558	$252,824	$378.89	$331.74 - $413.42
Q3 2021	684,718	$277,728	$459.88	$394.08 - $511.67
Q2 2021	712,848	$337,327	$402.76	$358.04 - $473.74
Q1 2021	727,483	$279,397	$407.75	$346.30 - $540.63
Q4 2020	791,818	$292,973	$318.77	$280.17 - $368.03
Q3 2020	835,638	$258,279	$344.57	$253.33 - $393.19
Q2 2020	871,698	$322,833	$321.78	$244.30 - $367.51
Q1 2020	926,963	$253,172	$279.63	$191.42 - $330.38
Q4 2019	948,783	$314,749	$303.09	$272.14 - $327.46
Q3 2019	956,183	$290,890	$294.76	$256.13 - $370.39
Q2 2019	980,933	$361,130	$315.75	$292.17 - $358.95
Q1 2019	1,000,493	$310,843	$291.63	$261.30 - $313.54
Q4 2018	1,008,263	$302,408	$309.79	$263.62 - $361.78
Q3 2018	1,069,553	$392,590	$320.46	$267.18 - $362.46
Q2 2018	1,126,843	$314,716	$254.40	$219.67 - $285.17
Q1 2018	1,873,520	$442,938	$229.19	$201.86 - $249.65
Q4 2017	1,887,360	$412,369	$205.77	$192.81 - $224.44
Q3 2017	1,903,230	$379,123	$186.17	$163.40 - $208.50
Q2 2017	2,035,420	$353,186	$173.03	$162.61 - $184.32
Q1 2017	2,072,110	$353,585	$157.56	$124.67 - $169.57
Q4 2016	2,079,730	$266,289	$134.78	$116.12 - $181.79
Q3 2016	2,083,170	$378,429	$159.99	$129.04 - $177.69
Q2 2016	2,139,920	$300,402	$142.06	$123.64 - $173.90
Q1 2016	2,174,770	$352,552	$152.87	$126.82 - $183.12
Q4 2015	2,174,180	$417,323	$161.39	$126.46 - $191.12
Q3 2015	2,178,040	$382,943	$202.14	$156.82 - $235.77
Q2 2015	2,239,397	$488,995	$195.32	$173.81 - $217.00
Q1 2015	2,241,987	$416,202	$188.35	$173.66 - $207.52
Q4 2014	2,241,847	$413,800	$176.23	$141.17 - $191.99
Q3 2014	2,244,837	$367,974	$167.17	$152.58 - $179.96
Q2 2014	2,252,780	$402,211	$149.19	$124.21 - $175.88
Q1 2014	2,262,270	$336,309	$146.95	$103.88 - $178.31
Q4 2013	2,048,063	$226,495	$91.59	$70.79 - $111.87
Q3 2013	2,035,663	$164,543	$76.50	$70.17 - $83.47
Q2 2013	2,028,200	$151,790	$64.01	$52.31 - $75.01