Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionMeeder Asset Management Inc
Latest Disclosed Ownership15,231 shares
Latest Disclosed Value $ 4,119,834
Meeder Asset Management Inc reports 7.19% increase in ownership of 12355 / Western Digital Corporation

On May 7, 2026 - Meeder Asset Management Inc filed a 13F-HR form disclosing ownership of 15,231 shares of Western Digital Corporation (CH:12355) valued at $4,119,834 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 14,209 shares of Western Digital Corporation. This represents a change in shares of 7.19% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F WESTERN DIGITAL COM 958102105 15,231 1,022 7.19 4,120 68.33 0.1147
2026-02-11 2025-12-31 13F WESTERN DIGITAL COM 958102105 14,209 13,814 3,497.22 2,448 5,106.38 0.1319
2025-10-24 2025-09-30 13F WESTERN DIGITAL COM 958102105 395 -39 -8.99 47 74.07 0.0027
2025-08-07 2025-06-30 13F WESTERN DIGITAL COM 958102105 434 434 28 0.0017
2025-05-07 2025-03-31 13F WESTERN DIGITAL COM 958102105 0 -361 -100.00 0 -100.00
2025-02-12 2024-12-31 13F WESTERN DIGITAL COM 958102105 361 361 22 0.0015
2024-11-07 2024-09-30 13F WESTERN DIGITAL COM 958102105 0 -285 -100.00 0 -100.00
2024-08-08 2024-06-30 13F WESTERN DIGITAL COM 958102105 285 285 22 0.0015
2024-05-07 2024-03-31 13F WESTERN DIGITAL COM 958102105 0 -6,135 -100.00 0 -100.00
2024-01-25 2023-12-31 13F WESTERN DIGITAL COM 958102105 6,135 0 0.00 321 15.05 0.0250
2023-11-13 2023-09-30 13F WESTERN DIGITAL COM 958102105 6,135 0 0.00 280 20.26 0.0221
2023-08-11 2023-06-30 13F WESTERN DIGITAL COM 958102105 6,135 0 0.00 233 0.43 0.0169
2023-05-15 2023-03-31 13F WESTERN DIGITAL COM 958102105 6,135 6,135 231 0.0184
2023-02-14 2022-12-31 13F WESTERN DIGITAL COM 958102105 0 -430 -100.00 0 -100.00
2022-11-14 2022-09-30 13F WESTERN DIGITAL COM 958102105 430 -197 -31.42 14 -50.00 0.0008
2022-08-08 2022-06-30 13F WESTERN DIGITAL COM 958102105 627 -6,230 -90.86 28 -91.76 0.0016
2022-05-10 2022-03-31 13F WESTERN DIGITAL COM 958102105 6,857 6,366 1,296.54 340 962.50 0.0125
2022-05-10 2022-03-31 13F WESTERN DIGITAL COM 958102105 4,560 226
2022-02-11 2021-12-31 13F WESTERN DIGITAL Common Stock 958102105 491 32 6.97 32 23.08 0.0032
2021-11-08 2021-09-30 13F WESTERN DIGITAL COM 958102105 459 -161 -25.97 26 -40.91 0.0014
2021-08-09 2021-06-30 13F WESTERN DIGITAL COM 958102105 620 154 33.05 44 41.94 0.0021
2021-04-28 2021-03-31 13F WESTERN DIGITAL COM 958102105 466 217 87.15 31 121.43 0.0016
2021-02-09 2020-12-31 13F WESTERN DIGITAL COM 958102105 249 -51 -17.00 14 27.27 0.0031
2020-11-02 2020-09-30 13F WESTERN DIGITAL COM 958102105 300 -85 -22.08 11 -35.29 0.0007
2020-08-11 2020-06-30 13F WESTERN DIGITAL COM 958102105 385 -936 -70.86 17 -69.09 0.0011
2020-05-15 2020-03-31 13F Western Digital Common Stock 958102105 1,321 90 7.31 55 -29.49 0.0043
2020-02-13 2019-12-31 13F Western Digital Common Stock 958102105 1,231 15 1.23 78 6.85 0.0048
2019-10-17 2019-09-30 13F Western Digital Common Stock 958102105 1,216 -2,021 -62.43 73 -52.60 0.0049
2019-08-05 2019-06-30 13F Western Digital Common Stock 958102105 3,237 210 6.94 154 6.21 0.0107
2019-04-16 2019-03-31 13F Western Digital Common Stock 958102105 3,027 0 0.00 145 29.46 0.0114
2019-01-17 2018-12-31 13F Western Digital Common Stock 958102105 3,027 -32,517 -91.48 112 -94.61 0.0100
2018-11-02 2018-09-30 13F Western Digital Common Stock 958102105 35,544 26,530 294.32 2,079 -99.70 0.1560
2018-07-24 2018-06-30 13F Western Digital Common Stock 958102105 9,014 4,289 90.77 697,774 159,939.91 0.0601
2018-05-03 2018-03-31 13F Western Digital Common Stock 958102105 4,725 -20,502 -81.27 436 -78.28 0.0405
2018-02-02 2017-12-31 13F Western Digital Common Stock 958102105 25,227 17,252 216.33 2,007 191.29 0.1705
2017-10-20 2017-09-30 13F Western Digital Common Stock 958102105 7,975 -2,887 -26.58 689 -28.38 0.0750
2017-07-13 2017-06-30 13F Western Digital Common Stock 958102105 10,862 4,479 70.17 962 82.54 0.0917
2017-05-12 2017-03-31 13F Western Digital Common Stock 958102105 6,383 6,050 1,816.82 527 2,295.45 0.0472
2017-01-11 2016-12-31 13F Western Digital Common Stock 958102105 333 -908 -73.17 22 -69.44 0.0021
2016-10-19 2016-09-30 13F Western Digital Common Stock 958102105 1,241 -5,329 -81.11 72 -76.85 0.0061
2016-07-22 2016-06-30 13F Western Digital Common Stock 958102105 6,570 -4,480 -40.54 311 -40.42 0.0291
2016-05-12 2016-03-31 13F Western Digital Common Stock 958102105 11,050 857 8.41 522 -14.71 0.0491
2016-01-15 2015-12-31 13F Western Digital Common Stock 958102105 10,193 -3,949 -27.92 612 -45.55 0.0553
2015-10-15 2015-09-30 13F Western Digital Common Stock 958102105 14,142 14,092 28,184.00 1,124 28,000.00 0.1100
2015-07-20 2015-06-30 13F Western Digital Common Stock 958102105 50 -63,027 -99.92 4 -99.93 0.0004
2015-04-29 2015-03-31 13F Western Digital Common Stock 958102105 63,077 63,077 0.00 5,741 0.6155
2015-01-27 2014-12-31 13F Western Digital Common Stock 958102105 0 -105,007 -100.00 0 -100.00
2014-10-15 2014-09-30 13F Western Digital Common Stock 958102105 105,007 -73,965 -41.33 10,220 -38.13 1.4978
2014-07-18 2014-06-30 13F Western Digital Common Stock 958102105 178,972 0 0.00 16,519 0.53 2.4486
2014-04-22 2014-03-31 13F Western Digital Common Stock 958102105 178,972 0 0.00 16,432 9.44 2.6994
2014-01-28 2013-12-31 13F Western Digital Common Stock 958102105 178,972 18,082 11.24 15,015 47.19 2.5647
2013-10-15 2013-09-30 13F Western Digital Common Stock 958102105 160,890 0 0.00 10,201 2.11 1.9390
2013-07-16 2013-06-30 13F Western Digital Common Stock 958102105 160,890 160,890 9,990 1.9829
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.