Marshall Wace’s Western Digital WDC Stock Holding History

Marshall Wace’s Portfolio WDC Stock Details WDC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$5.92M	Sell	21,900 -4,900	-18%	-$1.28M	0.01%	1219
2025 Q4	$4.62M	Buy	26,800 +26,600	+13,300%	+$4.03M	﹤0.01%	1191
2025 Q3	$24K	Buy	+200	New	+$16.3K	﹤0.01%	2778
2022 Q1	–	Sell	-78,454	Closed	-$3.87M	–	4084
2021 Q4	$3.87M	Buy	78,454 +78,057	+19,662%	+$3.39M	0.01%	1567
2021 Q3	$17K	Buy	397 +265	+201%	+$12.6K	﹤0.01%	2958
2021 Q2	$7K	Buy	+132	New	+$7.14K	﹤0.01%	2588

Other funds holding WDC

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Marshall Wace's WDC Position: Q1 2026 in Review

Marshall Wace increased its Western Digital (WDC) stake by 475% in Q1 2026, buying an estimated $201M and bringing the position to 931,323 shares worth $252M. The position accounts for 0.25% of the portfolio, ranked #54.

Marshall Wace first reported a position in WDC in Q1 2014 and has held it in 36 quarters since. 1,406 funds tracked by Wall St. Rank hold WDC as of Q1 2026.

Marshall Wace held 931,323 shares of Western Digital worth $252M as of Q1 2026.
Marshall Wace bought 769,455 Western Digital shares in Q1 2026, an estimated $201M.
Western Digital made up 0.25% of Marshall Wace's portfolio in Q1 2026, its #54 holding.
Marshall Wace first reported a position in Western Digital in Q1 2014 and has held it in 36 quarters since.
1,406 funds tracked by Wall St. Rank held Western Digital as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.