Position in WDC
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$255,683,446
+$3,769,889 QoQ
Shares Held
400,306
-57.0% QoQ
Ownership
0.111%
of shares outstanding
% of Portfolio
0.31%
of 13F equity value
Holder Rank
#87
of 1,836 holders
Holding Since
Dec 2020
23 quarters on record
Voting authority
Sole 0%
Shared 100%
None 0%
Common Shares in WDC Over Time
Shares Held
Position Value (USD)
Derivatives in WDC
reported options exposure · as of Jun 30, 2026CallValue
$8,814,336
CallShares
13,800
PutValue
$22,099,712
PutShares
34,600
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 Jun 30, 2026MARSHALL WACE, LLP holds $1,265,931,984 across 20 Computer Hardware names. WDC ranks #2 (20.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | SNDK |
Sandisk Corp
|
209,217 | $475,702,968 | |
| 2 | WDC |
Western Digital Corp
This page
|
400,306 | $255,683,446 | |
| 3 | SMCI |
Super Micro Computer, Inc.
|
6,118,753 | $213,408,023 | |
| 4 | IONQ |
IonQ, Inc.
|
2,327,425 | $123,958,654 | |
| 5 | STX |
Seagate Technology Holdings plc
|
103,612 | $99,985,580 | |
| 6 | LOGI |
Logitech International S.A.
|
412,299 | $38,772,597 | |
| 7 | DELL |
Dell Technologies Inc.
|
32,142 | $13,867,986 | |
| 8 | DDD |
3D Systems Corp
|
3,931,656 | $11,873,599 |
All Filings in WDC
Export CSV
38 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $255,683,446 | 400,306 | Shares | Other | 2026-08-13 | |
| 2026-06-30 | $22,099,712 | 34,600 | Put | Other | 2026-08-13 | |
| 2026-06-30 | $8,814,336 | 13,800 | Call | Other | 2026-08-13 | |
| 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 | $29,595,913 | 496,326 | Shares | Other | 2025-02-13 | |
| 2024-09-30 | $19,730,331 | 288,920 | Shares | Other | 2024-11-14 | |
| 2024-06-30 | $53,750,220 | 709,386 | Shares | Other | 2024-08-14 | |
| 2024-03-31 | $11,956,866 | 175,218 | Shares | Other | 2024-05-15 | |
| 2023-12-31 | $27,329,770 | 521,859 | Shares | Other | 2024-02-14 | |
| 2023-09-30 | $11,854,355 | 259,793 | Shares | Other | 2023-11-14 | |
| 2023-06-30 | $2,999,163 | 79,071 | Shares | Other | 2023-08-14 | |
| 2023-03-31 | $29,713,339 | 788,779 | Shares | Other | 2023-05-15 | |
| 2022-12-31 | $933,469 | 29,587 | Shares | Other | 2023-02-14 | |
| 2022-09-30 | $705,424 | 21,672 | Shares | Other | 2022-11-14 | |
| 2022-06-30 | $1,055,028 | 23,534 | Shares | Other | 2022-08-15 | |
| 2022-03-31 | $708,554 | 14,271 | Shares | Other | 2022-05-16 | |
| 2021-12-31 | $10,942,239 | 167,800 | Put | Other | 2022-02-14 | |
| 2021-12-31 | $6,066,486 | 93,030 | Shares | Other | 2022-02-14 | |
| 2021-12-31 | $3,866,953 | 59,300 | Call | Other | 2022-02-14 | |
| 2021-09-30 | $242,691 | 4,300 | Put | Sole | 2021-11-15 | |
| 2021-09-30 | $350,943 | 6,218 | Shares | Sole | 2021-11-15 | |
| 2021-09-30 | $16,931 | 300 | Call | Sole | 2021-11-15 | |
| 2021-06-30 | $3,579,849 | 50,300 | Put | Sole | 2021-08-13 | |
| 2021-06-30 | $7,116 | 100 | Call | Sole | 2021-08-13 | |
| 2021-06-30 | $6,919,288 | 97,222 | Shares | Sole | 2021-08-13 | |
| 2021-03-31 | $14,879,371 | 222,912 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $8,021,973 | 144,827 | Shares | Sole | 2021-02-16 | |
| No filing history on record for this holder in this stock. | ||||||