MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Position in WDC — Western Digital Corp
CIK 912938
Boston, MA
Position in WDC
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$50,180,221
+$47,778,434 QoQ
Shares Held
185,516
+1230.6% QoQ
Ownership
0.054%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
16 quarters on record
Voting authority
Sole 90.51618189266694.ToString("F0")%
Shared 5.257767524094957.ToString("F0")%
None 4.226050583238104.ToString("F0")%
Common Shares in WDC Over Time
Shares Held
Position Value (USD)
Position in Computer Hardware
Technology · as of Mar 31, 2026MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $1,956,514,518 across 7 Computer Hardware names. WDC ranks #3 (2.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | STX |
Seagate Technology Holdings plc
|
2,536,122 | $993,551,152 | |
| 2 | ANET |
Arista Networks, Inc.
|
7,227,921 | $887,444,136 | |
| 3 | WDC |
Western Digital Corp
This page
|
185,516 | $50,180,221 | |
| 4 | CRSR |
Corsair Gaming, Inc.
|
3,119,308 | $17,312,159 | |
| 5 | SNDK |
Sandisk Corp
|
11,294 | $7,175,529 | |
| 6 | QBTS |
D-Wave Quantum Inc.
|
41,479 | $598,541 | |
| 7 | IONQ |
IonQ, Inc.
|
8,768 | $252,780 |
All Filings in WDC
Export CSV
16 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $50,180,221 | 185,516 | Shares | Sole | 2026-05-14 | |
| 2025-12-31 | $2,401,787 | 13,942 | Shares | Sole | 2026-01-22 | |
| 2023-06-30 | $560,894 | 19,564 | Shares | Sole | 2023-08-09 | |
| 2023-03-31 | $530,057 | 18,616 | Shares | Sole | 2023-05-10 | |
| 2022-12-31 | $452,526 | 18,976 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $432,130 | 17,564 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $589,024 | 17,383 | Shares | Sole | 2022-08-09 | |
| 2022-03-31 | $564,538 | 15,043 | Shares | Sole | 2022-05-11 | |
| 2021-12-31 | $705,973 | 14,323 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $1,061,438 | 24,881 | Shares | Sole | 2021-11-10 | |
| 2021-06-30 | $1,503,015 | 27,940 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $1,549,830 | 30,718 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $1,119,021 | 26,728 | Shares | Sole | 2021-05-12 | |
| 2020-09-30 | $778,766 | 28,189 | Shares | Sole | 2020-11-12 | |
| 2020-06-30 | $1,009,542 | 30,252 | Shares | Sole | 2020-11-20 | |
| 2020-03-31 | $878,455 | 27,924 | Shares | Sole | 2020-11-20 | |
| No filing history on record for this holder in this stock. | ||||||