WDC — WESTERN DIGITAL CORP

Ownership history in CSS LLC/IL · 25 quarters on record

This page tracks every 13F SEC filing in which CSS LLC/IL reported a position in WESTERN DIGITAL CORP (WDC). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position

0.3% (2025 Q4)

Avg. % of fund

0.05%

First filed

2016 Q2

Last filed

2025 Q4

Quarters held

25

Quarter	Action	Shares	Change	Chg %	% of Fund	Mkt Value	Price (EOQ)
2025 Q4	ADDED	39,823	+1,070	+2.8%	0.30%	$6.9M	$172.19
2025 Q3	ADDED	38,753	+28,753	+287.5%	0.21%	$4.7M	$119.91
2025 Q3	REDUCED	10,000	-3,480	-25.8%	0.07%	$1.6M	$119.91
2025 Q2	REDUCED	13,480	-1,120	-7.7%	0.04%	$863K	$63.83

% of Fund (quarterly) WDC price (monthly, adj. close)

Other funds also holding WDC

As of 2025 Q4 — sorted by position size

Central Asset Investments & Management Holdings (HK) Ltd 3Y 7Y 14.98% Maple Rock Capital Partners Inc. 3Y 7Y 13.55% Wolf Hill Capital Management, LP 3Y 11.23% 53 HOUSE LLP 3Y 7Y 10.0% Atalan Capital Partners, LP 3Y 7Y 8.65% Alta Park Capital, LP 3Y 7Y 8.16% Amanah Holdings Trust 7.95% Trivest Advisors Ltd 3Y 6.88% Grand Alliance Asset Management Ltd 6.39% Rivermont Capital Management LP 3Y 6.31%

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