Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionCoastline Trust Co
Latest Disclosed Ownership150 shares
Latest Disclosed Value $ 40,574
Coastline Trust Co ownership in WDC / Western Digital Corporation

On April 3, 2026 - Coastline Trust Co filed a 13F-HR form disclosing ownership of 150 shares of Western Digital Corporation (MX:WDC) valued at $40,574 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 150 shares of Western Digital Corporation. This represents a change in shares of 0.00% 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)
2026-04-03 2026-03-31 13F WESTERN DIGITAL COM 958102105 150 0 0.00 41 60.00 0.0040
2026-01-05 2025-12-31 13F WESTERN DIGITAL COM 958102105 150 0 0.00 26 38.89 0.0024
2025-10-21 2025-09-30 13F WESTERN DIGITAL COM 958102105 150 0 0.00 18 100.00 0.0019
2025-07-17 2025-06-30 13F WESTERN DIGITAL COM 958102105 150 0 0.00 10 50.00 0.0011
2025-04-28 2025-03-31 13F WESTERN DIGITAL COM 958102105 150 0 0.00 6 -25.00 0.0008
2025-02-13 2024-12-31 13F WESTN DIGITAL COM 958102105 150 0 0.00 9 -20.00 0.0010
2024-11-06 2024-09-30 13F WESTN DIGITAL COM 958102105 150 150 10 0.0012
2023-02-09 2022-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 0 -10,123 -100.00 0 -100.00
2022-11-03 2022-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 10,123 0 0.00 330 -27.15 0.0528
2022-07-22 2022-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 10,123 -540 -5.06 453 -14.37 0.0670
2022-05-04 2022-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 10,663 -343 -3.12 529 -26.32 0.0643
2022-02-10 2021-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 11,006 731 7.11 718 23.79 0.0819
2021-11-09 2021-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 10,275 580 5.98 580 -15.94 0.0722
2021-08-10 2021-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 9,695 -1,680 -14.77 690 -9.09 0.0854
2021-05-10 2021-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 11,375 -2,449 -17.72 759 -0.91 0.0978
2021-02-12 2020-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 13,824 -2,460 -15.11 766 28.74 0.1021
2020-10-15 2020-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 16,284 5,740 54.44 595 27.96 0.0894
2020-08-07 2020-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 10,544 -210 -1.95 465 3.79 0.0734
2020-06-10 2020-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 10,754 -120 -1.10 448 -35.17 0.0809
2020-01-15 2019-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 10,874 0 0.00 691 6.47 0.0958
2019-10-18 2019-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 10,874 -1,000 -8.42 649 14.87 0.0955
2019-07-18 2019-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 11,874 2,040 20.74 565 19.70 0.0821
2019-04-25 2019-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 9,834 3,990 68.28 472 118.52 0.0705
2019-01-15 2018-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 5,844 -15,387 -72.47 216 -82.62 0.0372
2018-10-17 2018-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 21,231 1,395 7.03 1,243 -19.02 0.1781
2018-07-27 2018-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 19,836 2,740 16.03 1,535 -2.72 0.2315
2018-04-16 2018-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 17,096 5,920 52.97 1,578 77.50 0.2425
2018-01-17 2017-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 11,176 -2,060 -15.56 889 -22.29 0.1337
2017-11-17 2017-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 13,236 1,880 16.56 1,144 13.72 0.1995
2017-08-10 2017-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 11,356 -45 -0.39 1,006 6.91 0.1823
2017-04-19 2017-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 11,401 -55 -0.48 941 20.80 0.1757
2017-01-17 2016-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 11,456 -240 -2.05 779 13.89 0.1530
2016-10-20 2016-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 11,696 1,946 19.96 684 48.37 0.1338
2016-07-18 2016-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 9,750 2,430 33.20 461 33.24 0.0931
2016-04-15 2016-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 7,320 1,365 22.92 346 -3.35 0.0738
2016-01-15 2015-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 5,955 1,025 20.79 358 -8.44 0.0786
2015-10-30 2015-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 4,930 -135 -2.67 391 -1.51 0.0890
2015-07-22 2015-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 5,065 -3,050 -37.58 397 -46.28 0.0830
2015-04-17 2015-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 8,115 -35 -0.43 739 -18.07 0.1517
2015-01-21 2014-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 8,150 -175 -2.10 902 11.36 0.1884
2014-10-20 2014-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 8,325 -1,025 -10.96 810 -6.14 0.2123
2014-07-23 2014-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 9,350 -500 -5.08 863 -4.54 0.2239
2014-05-09 2014-03-31 13F WESTERN DIGITAL COMMON STOCK 958102105 9,850 -650 -6.19 904 2.61 0.2403
2014-02-14 2013-12-31 13F WESTERN DIGITAL COMMON STOCK 958102105 10,500 -595 -5.36 881 25.32 0.2393
2013-11-12 2013-09-30 13F WESTERN DIGITAL COMMON STOCK 958102105 11,095 -1,975 -15.11 703 -13.42 0.2067
2013-08-06 2013-06-30 13F WESTERN DIGITAL COMMON STOCK 958102105 13,070 13,070 812 0.2503
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.