Question 1

How many shares of WDC does CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM own?

Accepted Answer

As of 2026-Q2, CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds 529,792 shares of WDC (WESTERN DIGITAL CORP).

Question 2

What is CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's WDC position worth?

Accepted Answer

As of 2026-Q2, CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's WDC position is worth $338.4M.

Question 3

Is CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM buying or selling WDC?

Accepted Answer

In 2026-Q2, CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM increased their WDC position (+1.0% change in shares).

Question 4

When did CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM first buy WDC?

Accepted Answer

Based on available 13F filings, CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM first reported a position in WDC in 2024-Q3. They have held the position across 31 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	529,792	+1.0%	$338.4M	0.3%	$638.52	37
2026-Q1	Decreased	524,436	-3.7%	$141.9M	0.2%	$270.33	0
2025-Q4	Increased	544,524	+5.8%	$93.8M	0.1%	$172.09	32
2025-Q3	Increased	514,643	+5.2%	$61.8M	0.1%	$119.84	31
2025-Q2	Decreased	489,216	-1.3%	$31.3M	0.0%	$63.80	0
2025-Q1	Increased	495,736	+0.6%	$20M	0.0%	$40.23	28
2024-Q4	Decreased	492,846	-2.0%	$29.4M	0.0%	$44.85	0
2024-Q3	Decreased	502,893	-1.0%	$34.3M	0.0%	$51.37	0