Western Digital Corporation
CH ˙ BRSE ˙ US9581021055
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityCH:12355 / Western Digital Corporation
InstitutionKoshinski Asset Management, Inc.
Latest Disclosed Ownership1,604 shares
Latest Disclosed Value $ 433,873
Koshinski Asset Management, Inc. reports 8.31% increase in ownership of 12355 / Western Digital Corporation

On April 27, 2026 - Koshinski Asset Management, Inc. filed a 13F-HR form disclosing ownership of 1,604 shares of Western Digital Corporation (CH:12355) valued at $433,873 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 1,481 shares of Western Digital Corporation. This represents a change in shares of 8.31% 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)
2026-04-27 2026-03-31 13F WESTERN DIGITAL COM 958102105 1,604 123 8.31 434 69.80 0.0270
2026-02-03 2025-12-31 13F WESTERN DIGITAL COM 958102105 1,481 1,481 255 0.0164
2024-05-08 2024-03-31 13F WESTERN DIGITAL COM 958102105 0 -4,115 -100.00 0 -100.00
2024-01-29 2023-12-31 13F WESTERN DIGITAL COM 958102105 4,115 4,115 216 0.0327
2023-01-24 2022-12-31 13F WESTERN DIGITAL COM 958102105 0 -7,075 -100.00 0 0.0000
2022-10-20 2022-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 7,075 -570 -7.46 0 0.0275
2022-07-12 2022-06-30 13F WESTERN DIGITAL COM 958102105 7,645 -105 -1.35 0 -100.00 0.0341
2022-04-20 2022-03-31 13F WESTERN DIGITAL COM 958102105 7,750 -313 -3.88 385 -26.86 0.0316
2022-01-14 2021-12-31 13F WESTERN DIGITAL COM 958102105 8,063 40 0.50 526 16.15 0.0425
2021-10-12 2021-09-30 13F WESTERN DIGITAL COM 958102105 8,023 131 1.66 453 -19.57 0.0394
2021-07-26 2021-06-30 13F WESTERN DIGITAL COM 958102105 7,892 280 3.68 562 10.63 0.0707
2021-05-06 2021-03-31 13F WESTERN DIGITAL COM 958102105 7,612 -108 -1.40 508 18.69 0.0538
2021-03-30 2020-12-31 13F/A-2 WESTERN DIGITAL COM 958102105 7,720 -34 -0.44 428 44.11 0.0542
2021-02-05 2020-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 7,655 -65 428 0.0542
2020-11-16 2020-09-30 13F WESTERN DIGITAL COM 958102105 7,754 -121 -1.54 297 -14.66 0.0399
2020-07-29 2020-06-30 13F WESTERN DIGITAL COM 958102105 7,875 -78 -0.98 348 5.14 0.0564
2020-04-30 2020-03-31 13F WESTERN DIGITAL COM 958102105 7,953 -258 -3.14 331 -35.35 0.0695
2020-01-29 2019-12-31 13F WESTERN DIGITAL COM 958102105 8,211 1,807 28.22 512 34.03 0.0881
2019-10-30 2019-09-30 13F WESTERN DIGITAL COM 958102105 6,404 358 5.92 382 33.10 0.2652
2019-07-18 2019-06-30 13F WESTERN DIGITAL COM 958102105 6,046 -1,797 -22.91 287 -23.87 0.1167
2019-05-14 2019-03-31 13F WESTERN DIGITAL COM 958102105 7,843 2,062 35.67 377 76.17 0.1010
2019-02-08 2018-12-31 13F WESTERN DIGITAL COM 958102105 5,781 -3,034 -34.42 214 -58.53 0.0526
2018-11-15 2018-09-30 13F WESTERN DIGITAL COM 958102105 8,815 2,132 31.90 516 -0.19 0.0734
2018-08-13 2018-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 6,683 183 2.82 517 -13.83 0.1578
2018-08-10 2018-06-30 13F WESTERN DIGITAL COM 958102105 6,683 183 1,006
2018-04-09 2018-03-31 13F WESTERN DIGITAL COM 958102105 6,500 272 4.37 600 21.21 0.1864
2018-01-17 2017-12-31 13F WESTERN DIGITAL COM 958102105 6,228 -1,290 -17.16 495 -23.85 0.1239
2018-01-17 2017-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 7,518 575 8.28 650 5.69 0.2132
2017-10-12 2017-09-30 13F WESTERN DIGITAL COM 958102105 7,518 575 650
2018-01-17 2017-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 6,943 -136 -1.92 615 5.31 0.2243
2017-07-10 2017-06-30 13F WESTERN DIGITAL COM 958102105 6,943 -136 615
2018-01-17 2017-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 7,079 280 4.12 584 26.41 0.2287
2017-04-10 2017-03-31 13F WESTERN DIGITAL COM 958102105 7,079 280 584
2018-01-17 2016-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 6,799 -159 -2.29 462 13.51 0.2290
2017-01-24 2016-12-31 13F WESTERN DIGITAL COM 958102105 6,799 -159 462
2018-01-17 2016-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 6,958 791 12.83 407 39.86 0.2023
2016-10-17 2016-09-30 13F WESTERN DIGITAL COM 958102105 6,958 791 407
2018-01-17 2016-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 6,167 -967 -13.55 291 -13.65 0.1587
2016-08-10 2016-06-30 13F WESTERN DIGITAL COM 958102105 6,167 -967 291
2018-01-17 2016-03-31 13F/A-1 WESTERN DIGITAL COM 958102105 7,134 568 8.65 337 -14.47 0.2176
2016-04-14 2016-03-31 13F WESTERN DIGITAL COM 958102105 7,134 568 337
2018-01-17 2015-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 6,566 -220 -3.24 394 -25.94 0.2755
2016-01-19 2015-12-31 13F WESTERN DIGITAL COM 958102105 6,566 -220 394
2018-01-17 2015-09-30 13F/A-1 WESTERN DIGITAL COM 958102105 6,786 -369 -5.16 532 -5.17 0.3394
2015-10-13 2015-09-30 13F WESTERN DIGITAL COM 958102105 6,786 -369 532
2018-01-17 2015-06-30 13F/A-1 WESTERN DIGITAL COM 958102105 7,155 -432 -5.69 561 -18.81 0.3547
2015-07-13 2015-06-30 13F WESTERN DIGITAL COM 958102105 7,155 -432 561
2015-04-15 2015-03-31 13F WESTERN DIGITAL COM 958102105 7,587 80 1.07 691 -16.85 0.4479
2018-01-17 2014-12-31 13F/A-1 WESTERN DIGITAL COM 958102105 7,507 7,507 831 0.4710
2015-02-13 2014-12-31 13F WESTERN DIGITAL COM 958102105 7,507 831
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.