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Parallax Volatility Advisers, L.P.

Position in WDC — Western Digital Corp

CIK 1521001 San Francisco, CA

Position in WDC

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$3,033,281
-$15,485,005 QoQ
Shares Held
4,749
-93.1% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.15%
of 13F equity value
Holder Rank
#716
of 1,846 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in WDC Over Time

Shares Held

Position Value (USD)

Derivatives in WDC

reported options exposure · as of Jun 30, 2026
CallValue
$63,872,000
CallShares
100,000
PutValue
$0
PutShares
0

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, 2026

Parallax Volatility Advisers, L.P. holds $57,799,254 across 9 Computer Hardware names. WDC ranks #4 (5.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
4 WDC
Western Digital Corp
This page
4,749 $3,033,281

All Filings in WDC

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $63,872,000 100,000
2026-06-30 $3,033,281 4,749
2026-03-31 $39,599,736 146,400
2026-03-31 $18,518,286 68,462
2026-03-31 $27,049 100
2025-12-31 $39,914,959 231,700
2025-12-31 $16,747,572 97,217
2025-12-31 $6,408,444 37,200
2025-09-30 $4,445,941 37,031
2025-09-30 $18,333,162 152,700
2025-09-30 $38,707,344 322,400
2025-06-30 $5,439,277 85,002
2025-06-30 $12,266,883 191,700
2025-06-30 $10,852,704 169,600
2025-03-31 $4,871,815 120,500
2025-03-31 $3,710,665 91,780
2025-03-31 $11,498,292 284,400
2024-12-31 $17,179,400 288,100
2024-12-31 $3,568,854 59,850
2024-12-31 $29,814 500
2024-09-30 $4,408,184 64,551
2024-09-30 $2,335,516 34,200
2024-09-30 $20,015,785 293,100
2024-06-30 $18,540,934 244,700
2024-06-30 $7,861,674 103,757
2024-06-30 $5,728,216 75,600
2024-03-31 $5,927,799 86,867
2024-03-31 $4,435,596 65,000
2023-12-31 $5,561,697 106,200
2023-12-31 $4,074,388 77,800
2023-09-30 $3,677,778 80,600
2023-09-30 $4,339,413 95,100
2023-06-30 $1,847,191 48,700
2023-06-30 $2,522,345 66,500
2023-03-31 $17,267,947 458,400
2023-03-31 $12,129,754 322,000
2023-03-31 $4,037,211 107,173
2022-12-31 $8,360,744 265,000
2022-12-31 $20,781,970 658,700
2022-09-30 $16,610,282 510,300
2022-09-30 $14,618,220 449,100
2022-06-30 $16,291,217 363,400
2022-06-30 $16,542,265 369,000
2022-06-30 $6,267,859 139,814
2022-03-31 $22,524,490 453,666
2022-03-31 $43,255,028 871,200
2022-03-31 $8,445,454 170,100
2021-12-31 $77,026,055 1,181,200
2021-12-31 $11,635,291 178,428
2021-12-31 $6,155,824 94,400