Position in WDC
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$251,913,557
+$224,028,557 QoQ
Shares Held
931,323
+475.4% QoQ
Ownership
0.270%
of shares outstanding
% of Portfolio
0.36%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2020
21 quarters on record
Voting authority
Sole 0.ToString("F0")%
Shared 100.ToString("F0")%
None 0.ToString("F0")%
Common Shares in WDC Over Time
Shares Held
Position Value (USD)
Derivatives in WDC
reported options exposure · as of Mar 31, 2026CallValue
$5,923,731
CallShares
21,900
PutValue
$4,273,742
PutShares
15,800
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Computer Hardware
Technology · as of Mar 31, 2026MARSHALL WACE, LLP holds $883,326,782 across 18 Computer Hardware names. WDC ranks #2 (28.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | SNDK |
Sandisk Corp
|
564,586 | $358,704,067 | |
| 2 | WDC |
Western Digital Corp
This page
|
931,323 | $251,913,557 | |
| 3 | SMCI |
Super Micro Computer, Inc.
|
7,188,017 | $163,671,146 | |
| 4 | ANET |
Arista Networks, Inc.
|
397,000 | $48,743,660 | |
| 5 | LOGI |
Logitech International S.A.
|
359,586 | $32,765,475 | |
| 6 | DDD |
3D Systems Corp
|
3,185,695 | $5,989,105 | |
| 7 | STX |
Seagate Technology Holdings plc
|
14,425 | $5,651,138 | |
| 8 | QBTS |
D-Wave Quantum Inc.
|
340,363 | $4,911,438 |
All Filings in WDC
Export CSV
32 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $4,273,742 | 15,800 | Put | Other | 2026-05-15 | |
| 2026-03-31 | $5,923,731 | 21,900 | Call | Other | 2026-05-15 | |
| 2026-03-31 | $251,913,557 | 931,323 | Shares | Other | 2026-05-15 | |
| 2025-12-31 | $4,616,836 | 26,800 | Call | Other | 2026-02-13 | |
| 2025-12-31 | $7,338,702 | 42,600 | Put | Other | 2026-02-13 | |
| 2025-12-31 | $27,885,000 | 161,868 | Shares | Other | 2026-02-13 | |
| 2025-09-30 | $38,706,863 | 322,396 | Shares | Other | 2025-11-13 | |
| 2025-09-30 | $204,102 | 1,700 | Put | Other | 2025-11-13 | |
| 2025-09-30 | $24,012 | 200 | Call | Other | 2025-11-13 | |
| 2025-06-30 | $27,176,553 | 424,700 | Put | Other | 2025-08-13 | |
| 2025-06-30 | $2,986,541 | 46,672 | Shares | Other | 2025-08-13 | |
| 2025-03-31 | $1,366,534 | 33,800 | Shares | Other | 2025-05-15 | |
| 2024-12-31 | $22,370,304 | 496,326 | Shares | Other | 2025-02-13 | |
| 2024-09-30 | $14,913,327 | 288,920 | Shares | Other | 2024-11-14 | |
| 2024-06-30 | $40,627,528 | 709,386 | Shares | Other | 2024-08-14 | |
| 2024-03-31 | $9,037,691 | 175,218 | Shares | Other | 2024-05-15 | |
| 2023-12-31 | $20,657,422 | 521,859 | Shares | Other | 2024-02-14 | |
| 2023-09-30 | $8,960,208 | 259,793 | Shares | Other | 2023-11-14 | |
| 2023-06-30 | $2,266,941 | 79,071 | Shares | Other | 2023-08-14 | |
| 2023-03-31 | $22,459,062 | 788,779 | Shares | Other | 2023-05-15 | |
| 2022-12-31 | $705,570 | 29,587 | Shares | Other | 2023-02-14 | |
| 2022-09-30 | $533,200 | 21,672 | Shares | Other | 2022-11-14 | |
| 2022-06-30 | $797,451 | 23,534 | Shares | Other | 2022-08-15 | |
| 2022-03-31 | $535,566 | 14,271 | Shares | Other | 2022-05-16 | |
| 2021-12-31 | $8,270,777 | 167,800 | Put | Other | 2022-02-14 | |
| 2021-12-31 | $4,585,401 | 93,030 | Shares | Other | 2022-02-14 | |
| 2021-12-31 | $2,922,867 | 59,300 | Call | Other | 2022-02-14 | |
| 2021-09-30 | $183,440 | 4,300 | Put | Sole | 2021-11-15 | |
| 2021-09-30 | $265,263 | 6,218 | Shares | Sole | 2021-11-15 | |
| 2021-09-30 | $12,798 | 300 | Call | Sole | 2021-11-15 | |
| 2021-03-31 | $11,246,690 | 222,912 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $6,063,472 | 144,827 | Shares | Sole | 2021-02-16 | |
| No filing history on record for this holder in this stock. | ||||||