WESTERN DIGITAL CORP

Ticker: WDC CUSIP: 958102105 Class: EQTY

Robeco Institutional Asset Management B.V.'s Holding History (CIK: 0001418773)

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

Q4 2025

Shares 1,376,751 Value ($000) $237,173 Avg Close $151.55 Range $112.43 - $188.77

Q3 2025

Shares 782,748 Value ($000) $93,977 Avg Close $81.60 Range $62.82 - $122.49

Q2 2025

Shares 361,709 Value ($000) $23,146 Avg Close $47.46 Range $28.72 - $64.21

Q1 2025

Shares 125,971 Value ($000) $5,093 Avg Close $47.25 Range $38.95 - $54.41

Q4 2024

Shares 17,568 Value ($000) $1,048 Avg Close $50.08 Range $44.29 - $55.80

Q3 2024

Shares 26,402 Value ($000) $1,803 Avg Close $50.34 Range $39.73 - $60.52

Q2 2024

Shares 116,494 Value ($000) $8,827 Avg Close $55.25 Range $49.12 - $61.40

Q1 2024

Shares 44,589 Value ($000) $3,043 Avg Close $43.62 Range $36.87 - $52.17

Q4 2023

Shares 37,439 Value ($000) $1,961 Avg Close $34.87 Range $26.82 - $40.07

Q3 2023

Shares 17,809 Value ($000) $813 Avg Close $31.42 Range $27.45 - $35.31

Q2 2023

Shares 168,374 Value ($000) $6,386 Avg Close $27.71 Range $24.07 - $31.23

Q1 2023

Shares 269,192 Value ($000) $10,140 Avg Close $29.22 Range $23.31 - $34.06

Q4 2022

Shares 377,103 Value ($000) $11,898 Avg Close $26.28 Range $22.39 - $30.85

Q3 2022

Shares 400,784 Value ($000) $13,045 Avg Close $33.07 Range $23.76 - $38.36

Q2 2022

Shares 224,134 Value ($000) $10,048 Avg Close $40.01 Range $32.99 - $47.63

Q1 2022

Shares 144,268 Value ($000) $7,163 Avg Close $40.89 Range $33.02 - $52.23

Q4 2021

Shares 107,753 Value ($000) $7,025 Avg Close $43.29 Range $37.27 - $50.63

Q3 2021

Shares 219,722 Value ($000) $12,400 Avg Close $47.33 Range $41.77 - $54.33

Q2 2021

Shares 223,571 Value ($000) $15,911 Avg Close $53.87 Range $48.26 - $58.87

Q1 2021

Shares 150,179 Value ($000) $10,025 Avg Close $46.58 Range $36.61 - $54.95

Q4 2020

Shares 123,700 Value ($000) $6,852 Avg Close $33.07 Range $26.57 - $42.13

Q3 2020

Shares 187,623 Value ($000) $6,857 Avg Close $29.61 Range $25.25 - $35.68

Q2 2020

Shares 569,521 Value ($000) $25,142 Avg Close $32.27 Range $28.18 - $37.56

Q1 2020

Shares 617,171 Value ($000) $25,687 Avg Close $43.55 Range $20.36 - $53.51

Q4 2019

Shares 672,180 Value ($000) $42,663 Avg Close $40.69 Range $34.40 - $46.90

Q3 2019

Shares 788,041 Value ($000) $46,997 Avg Close $41.27 Range $34.56 - $47.73

Q2 2019

Shares 836,109 Value ($000) $39,758 Avg Close $32.78 Range $25.73 - $40.13

Q1 2019

Shares 761,925 Value ($000) $36,619 Avg Close $32.38 Range $25.03 - $38.16

Q4 2018

Shares 648,527 Value ($000) $24,012 Avg Close $33.07 Range $23.85 - $41.99

Q3 2018

Shares 571,029 Value ($000) $33,485 Avg Close $46.86 Range $37.47 - $56.00

Q2 2018

Shares 512,956 Value ($000) $39,757 Avg Close $58.47 Range $52.75 - $64.87

Q1 2018

Shares 461,018 Value ($000) $42,591 Avg Close $61.52 Range $53.81 - $73.88

Q4 2017

Shares 291,231 Value ($000) $23,172 Avg Close $58.49 Range $52.57 - $64.05

Q3 2017

Shares 120,634 Value ($000) $10,424 Avg Close $59.93 Range $53.45 - $65.37

Q2 2017

Shares 33,952 Value ($000) $3,010 Avg Close $59.68 Range $54.65 - $64.49

Q1 2017

Shares 32,026 Value ($000) $2,645 Avg Close $51.29 Range $46.27 - $57.21

Q4 2016

Shares 25,417 Value ($000) $1,727 Avg Close $40.87 Range $34.90 - $48.23

Q3 2016

Shares 31,353 Value ($000) $1,834 Avg Close $33.13 Range $28.62 - $40.10

Q2 2016

Shares 633,031 Value ($000) $29,918 Avg Close $28.61 Range $22.97 - $33.66

Q1 2016

Shares 608,461 Value ($000) $28,744 Avg Close $30.76 Range $25.11 - $39.62

Q4 2015

Shares 607,996 Value ($000) $36,509 Avg Close $43.55 Range $37.34 - $55.67

Q3 2015

Shares 949,313 Value ($000) $75,414 Avg Close $50.91 Range $43.42 - $56.60

Q2 2015

Shares 880,398 Value ($000) $69,042 Avg Close $60.27 Range $50.11 - $64.90

Q1 2015

Shares 930,402 Value ($000) $84,675 Avg Close $65.44 Range $57.41 - $72.02

Q4 2014

Shares 994,020 Value ($000) $110,037 Avg Close $62.96 Range $52.21 - $72.28

Q3 2014

Shares 1,192,375 Value ($000) $116,041 Avg Close $62.41 Range $58.43 - $64.97

Q2 2014

Shares 1,361,462 Value ($000) $125,662 Avg Close $55.43 Range $50.48 - $59.36

Q1 2014

Shares 1,302,691 Value ($000) $119,613 Avg Close $53.80 Range $50.34 - $57.78

Q4 2013

Shares 1,397,213 Value ($000) $117,226 Avg Close $45.88 Range $38.72 - $52.56

Q3 2013

Shares 89,380 Value ($000) $5,667 Avg Close $40.38 Range $36.69 - $43.65

Q2 2013

Shares 31,939 Value ($000) $1,984 Avg Close $35.69 Range $30.03 - $40.17

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,376,751	$237,173	$151.55	$112.43 - $188.77
Q3 2025	782,748	$93,977	$81.60	$62.82 - $122.49
Q2 2025	361,709	$23,146	$47.46	$28.72 - $64.21
Q1 2025	125,971	$5,093	$47.25	$38.95 - $54.41
Q4 2024	17,568	$1,048	$50.08	$44.29 - $55.80
Q3 2024	26,402	$1,803	$50.34	$39.73 - $60.52
Q2 2024	116,494	$8,827	$55.25	$49.12 - $61.40
Q1 2024	44,589	$3,043	$43.62	$36.87 - $52.17
Q4 2023	37,439	$1,961	$34.87	$26.82 - $40.07
Q3 2023	17,809	$813	$31.42	$27.45 - $35.31
Q2 2023	168,374	$6,386	$27.71	$24.07 - $31.23
Q1 2023	269,192	$10,140	$29.22	$23.31 - $34.06
Q4 2022	377,103	$11,898	$26.28	$22.39 - $30.85
Q3 2022	400,784	$13,045	$33.07	$23.76 - $38.36
Q2 2022	224,134	$10,048	$40.01	$32.99 - $47.63
Q1 2022	144,268	$7,163	$40.89	$33.02 - $52.23
Q4 2021	107,753	$7,025	$43.29	$37.27 - $50.63
Q3 2021	219,722	$12,400	$47.33	$41.77 - $54.33
Q2 2021	223,571	$15,911	$53.87	$48.26 - $58.87
Q1 2021	150,179	$10,025	$46.58	$36.61 - $54.95
Q4 2020	123,700	$6,852	$33.07	$26.57 - $42.13
Q3 2020	187,623	$6,857	$29.61	$25.25 - $35.68
Q2 2020	569,521	$25,142	$32.27	$28.18 - $37.56
Q1 2020	617,171	$25,687	$43.55	$20.36 - $53.51
Q4 2019	672,180	$42,663	$40.69	$34.40 - $46.90
Q3 2019	788,041	$46,997	$41.27	$34.56 - $47.73
Q2 2019	836,109	$39,758	$32.78	$25.73 - $40.13
Q1 2019	761,925	$36,619	$32.38	$25.03 - $38.16
Q4 2018	648,527	$24,012	$33.07	$23.85 - $41.99
Q3 2018	571,029	$33,485	$46.86	$37.47 - $56.00
Q2 2018	512,956	$39,757	$58.47	$52.75 - $64.87
Q1 2018	461,018	$42,591	$61.52	$53.81 - $73.88
Q4 2017	291,231	$23,172	$58.49	$52.57 - $64.05
Q3 2017	120,634	$10,424	$59.93	$53.45 - $65.37
Q2 2017	33,952	$3,010	$59.68	$54.65 - $64.49
Q1 2017	32,026	$2,645	$51.29	$46.27 - $57.21
Q4 2016	25,417	$1,727	$40.87	$34.90 - $48.23
Q3 2016	31,353	$1,834	$33.13	$28.62 - $40.10
Q2 2016	633,031	$29,918	$28.61	$22.97 - $33.66
Q1 2016	608,461	$28,744	$30.76	$25.11 - $39.62
Q4 2015	607,996	$36,509	$43.55	$37.34 - $55.67
Q3 2015	949,313	$75,414	$50.91	$43.42 - $56.60
Q2 2015	880,398	$69,042	$60.27	$50.11 - $64.90
Q1 2015	930,402	$84,675	$65.44	$57.41 - $72.02
Q4 2014	994,020	$110,037	$62.96	$52.21 - $72.28
Q3 2014	1,192,375	$116,041	$62.41	$58.43 - $64.97
Q2 2014	1,361,462	$125,662	$55.43	$50.48 - $59.36
Q1 2014	1,302,691	$119,613	$53.80	$50.34 - $57.78
Q4 2013	1,397,213	$117,226	$45.88	$38.72 - $52.56
Q3 2013	89,380	$5,667	$40.38	$36.69 - $43.65
Q2 2013	31,939	$1,984	$35.69	$30.03 - $40.17