WESTERN DIGITAL CORP

Ticker: WDC CUSIP: 958102105 Class: EQTY

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2025

Shares 68,783 Value ($000) $11,849 Avg Close $151.55 Range $112.43 - $188.77

Q3 2025

Shares 22,978 Value ($000) $2,759 Avg Close $81.60 Range $62.82 - $122.49

Q2 2025

Shares 63,151 Value ($000) $4,041 Avg Close $47.46 Range $28.72 - $64.21

Q1 2025

Shares 43,029 Value ($000) $1,740 Avg Close $47.25 Range $38.95 - $54.41

Q4 2024

Shares 40,486 Value ($000) $2,414 Avg Close $50.08 Range $44.29 - $55.80

Q3 2024

Shares 39,348 Value ($000) $2,687 Avg Close $50.34 Range $39.73 - $60.52

Q2 2024

Shares 33,599 Value ($000) $2,546 Avg Close $55.25 Range $49.12 - $61.40

Q1 2024

Shares 37,252 Value ($000) $2,542 Avg Close $43.62 Range $36.87 - $52.17

Q2 2019

Shares 32,255 Value ($000) $1,534 Avg Close $32.78 Range $25.73 - $40.13

Q1 2019

Shares 40,181 Value ($000) $1,931 Avg Close $32.38 Range $25.03 - $38.16

Q4 2018

Shares 60,401 Value ($000) $2,233 Avg Close $33.07 Range $23.85 - $41.99

Q3 2018

Shares 60,475 Value ($000) $3,540 Avg Close $46.86 Range $37.47 - $56.00

Q2 2018

Shares 10,129 Value ($000) $784 Avg Close $58.47 Range $52.75 - $64.87

Q1 2018

Shares 9,811 Value ($000) $905 Avg Close $61.52 Range $53.81 - $73.88

Q4 2017

Shares 28,863 Value ($000) $2,295 Avg Close $58.49 Range $52.57 - $64.05

Q3 2017

Shares 51,642 Value ($000) $4,462 Avg Close $59.93 Range $53.45 - $65.37

Q2 2017

Shares 51,552 Value ($000) $4,568 Avg Close $59.68 Range $54.65 - $64.49

Q1 2017

Shares 65,399 Value ($000) $5,397 Avg Close $51.29 Range $46.27 - $57.21

Q4 2016

Shares 5,966 Value ($000) $405 Avg Close $40.87 Range $34.90 - $48.23

Q2 2016

Shares 42,781 Value ($000) $2,022 Avg Close $28.61 Range $22.97 - $33.66

Q1 2016

Shares 31,675 Value ($000) $1,496 Avg Close $30.76 Range $25.11 - $39.62

Q4 2015

Shares 11,000 Value ($000) $661 Avg Close $43.55 Range $37.34 - $55.67

Q4 2013

Shares 600 Value ($000) $50 Avg Close $45.88 Range $38.72 - $52.56

Q3 2013

Shares 600 Value ($000) $38 Avg Close $40.38 Range $36.69 - $43.65

Q2 2013

Shares 600 Value ($000) $37 Avg Close $35.69 Range $30.03 - $40.17

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	68,783	$11,849	$151.55	$112.43 - $188.77
Q3 2025	22,978	$2,759	$81.60	$62.82 - $122.49
Q2 2025	63,151	$4,041	$47.46	$28.72 - $64.21
Q1 2025	43,029	$1,740	$47.25	$38.95 - $54.41
Q4 2024	40,486	$2,414	$50.08	$44.29 - $55.80
Q3 2024	39,348	$2,687	$50.34	$39.73 - $60.52
Q2 2024	33,599	$2,546	$55.25	$49.12 - $61.40
Q1 2024	37,252	$2,542	$43.62	$36.87 - $52.17
Q2 2019	32,255	$1,534	$32.78	$25.73 - $40.13
Q1 2019	40,181	$1,931	$32.38	$25.03 - $38.16
Q4 2018	60,401	$2,233	$33.07	$23.85 - $41.99
Q3 2018	60,475	$3,540	$46.86	$37.47 - $56.00
Q2 2018	10,129	$784	$58.47	$52.75 - $64.87
Q1 2018	9,811	$905	$61.52	$53.81 - $73.88
Q4 2017	28,863	$2,295	$58.49	$52.57 - $64.05
Q3 2017	51,642	$4,462	$59.93	$53.45 - $65.37
Q2 2017	51,552	$4,568	$59.68	$54.65 - $64.49
Q1 2017	65,399	$5,397	$51.29	$46.27 - $57.21
Q4 2016	5,966	$405	$40.87	$34.90 - $48.23
Q2 2016	42,781	$2,022	$28.61	$22.97 - $33.66
Q1 2016	31,675	$1,496	$30.76	$25.11 - $39.62
Q4 2015	11,000	$661	$43.55	$37.34 - $55.67
Q4 2013	600	$50	$45.88	$38.72 - $52.56
Q3 2013	600	$38	$40.38	$36.69 - $43.65
Q2 2013	600	$37	$35.69	$30.03 - $40.17