Question 1

How many shares of WESTERN DIGITAL CORP does MILLENNIUM MANAGEMENT LLC own?

Accepted Answer

As of 2026-Q1, MILLENNIUM MANAGEMENT LLC holds 205.6M shares of WESTERN DIGITAL CORP (WESTERN DIGITAL CORP).

Question 2

What is MILLENNIUM MANAGEMENT LLC's WESTERN DIGITAL CORP position worth?

Accepted Answer

As of 2026-Q1, MILLENNIUM MANAGEMENT LLC's WESTERN DIGITAL CORP position is worth $1.5B.

Question 3

Is MILLENNIUM MANAGEMENT LLC buying or selling WESTERN DIGITAL CORP?

Accepted Answer

In 2026-Q1, MILLENNIUM MANAGEMENT LLC increased their WESTERN DIGITAL CORP position (+2.7% change in shares).

Question 4

When did MILLENNIUM MANAGEMENT LLC first buy WESTERN DIGITAL CORP?

Accepted Answer

Based on available 13F filings, MILLENNIUM MANAGEMENT LLC first reported a position in WESTERN DIGITAL CORP in 2024-Q4. They have held the position across 6 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	Increased	205.6M	+2.7%	$1.5B	0.6%	—	46
2025-Q4	Increased	200.1M	+10.6%	$918.1M	0.4%	—	42
2025-Q3	Increased	180.9M	+11.0%	$580.4M	0.2%	—	42
2025-Q2	Increased	163M	+328.9%	$292.8M	0.1%	—	60
2025-Q1	Decreased	38M	-33.3%	$48.9M	0.0%	—	0
2024-Q4	New	57M	—	$75.6M	0.0%	—	41

WEWESTERN DIGITAL CORP