Western Digital Corporation
MX ˙ BMV ˙ US9581021055
SecurityMX:WDC / Western Digital Corporation
InstitutionMascoma Wealth Management LLC
Latest Disclosed Ownership4 shares
Latest Disclosed Value $ 1,082
Mascoma Wealth Management LLC ownership in WDC / Western Digital Corporation

On April 30, 2026 - Mascoma Wealth Management LLC filed a 13F-HR form disclosing ownership of 4 shares of Western Digital Corporation (MX:WDC) valued at $1,082 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 4 shares of Western Digital Corporation.

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)
2026-04-30 2026-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 4 0 0.00 1 0.0002
2026-02-04 2025-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 4 4 1 0.0001
2025-04-24 2025-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 0 -13 -100.00 0 0.0000
2025-02-10 2024-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 13 13 1 0.0002
2022-01-21 2021-12-31 13F WESTERN DIGITAL COM Stock 958102105 0 -90 -100.00 0 -100.00
2021-10-06 2021-09-30 13F WESTERN DIGITAL COM Stock 958102105 90 90 5 0.0019
2021-07-06 2021-06-30 13F WESTERN DIGITAL COM Stock 958102105 0 -90 -100.00 0 -100.00
2021-04-26 2021-03-31 13F WESTERN DIGITAL COM Stock 958102105 90 90 6 0.0026
2019-11-21 2019-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 0 -90 -100.00 0 -100.00
2019-07-29 2019-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 90 0 0.00 4 0.00 0.0025
2019-04-23 2019-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 90 0 0.00 4 33.33 0.0027
2019-01-28 2018-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 90 0 0.00 3 -40.00 0.0023
2018-11-08 2018-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 90 0 0.00 5 -28.57 0.0033
2018-08-13 2018-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 90 0 0.00 7 -12.50 0.0049
2018-04-24 2018-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 90 -70 -43.75 8 -42.86 0.0053
2018-02-05 2017-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 160 0 0.00 14 0.00 0.0086
2017-11-07 2017-09-30 13F WESTERN DIGITAL CORP COM Stock 958102105 160 0 0.00 14 0.00 0.0093
2017-07-13 2017-06-30 13F WESTERN DIGITAL CORP COM Stock 958102105 160 0 0.00 14 7.69 0.0094
2017-04-18 2017-03-31 13F WESTERN DIGITAL CORP COM Stock 958102105 160 0 0.00 13 18.18 0.0093
2017-01-30 2016-12-31 13F WESTERN DIGITAL CORP COM Stock 958102105 160 160 11 0.0081
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.