Does Primecap own MU stock?

Yes. As of its Q2 2026 13F, Primecap holds 19,217,236 shares of MU (Micron Technology), worth $22.2B.

How many shares of MU does Primecap own?

As of its Q2 2026 13F, Primecap holds 19,217,236 shares of MU (Micron Technology).

As of its Q2 2026 13F, Primecap's MU position is worth $22.2B.

In Q2 2026, Primecap reduced its MU position by 2,656,968 shares (-12.2%).

Primecap already held MU in its Q4 2018 13F, the earliest on record, and has listed it in 31 quarterly 13F filings.

Position history for PRIMECAP MANAGEMENT CO/CA/'s holdings in MICRON TECHNOLOGY INC

Current Value

$22.2B

Current Shares

19.2M

Total Value Change

+$20.3B

Total Shares Change

-38.6M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	19.2M	-12.2%	$22.2B	13.1%	$1,154.11	0
2026-Q1	Decreased	21.9M	-11.8%	$7.4B	5.8%	$337.79	0
2025-Q4	Decreased	24.8M	-16.4%	$7.1B	5.4%	$285.25	0
2025-Q3	Decreased	29.7M	-5.8%	$5B	3.8%	$167.05	0
2025-Q2	Decreased	31.5M	-15.6%	$3.9B	3.1%	$122.94	0
2025-Q1	Decreased	37.3M	-0.8%	$3.2B	2.7%	$86.67	0
2024-Q4	Decreased	37.6M	-0.1%	$3.2B	2.5%	$83.84	0
2024-Q3	Increased	37.6M	+0.6%	$3.9B	2.9%	$103.06	55
2024-Q2	Decreased	37.4M	-0.5%	$4.9B	3.6%	$130.59	0
2024-Q1	Increased	37.6M	+0.3%	$4.4B	3.3%	$117.05	59
2023-Q4	Decreased	37.5M	-0.4%	$3.2B	2.5%	$84.65	0
2023-Q3	Decreased	37.6M	-1.0%	$2.6B	2.2%	$67.28	0
2023-Q2	Decreased	38M	-2.4%	$2.4B	2.0%	$62.30	0
2023-Q1	Decreased	38.9M	-2.0%	$2.4B	2.0%	$59.44	0
2022-Q4	Decreased	39.7M	-1.7%	$2B	1.8%	$49.24	0
2022-Q3	Increased	40.4M	+0.0%	$2B	2.0%	$49.14	50
2022-Q2	Decreased	40.4M	-1.0%	$2.2B	2.0%	$54.11	0
2022-Q1	Decreased	40.8M	-0.9%	$3.2B	2.4%	$76.14	0
2021-Q4	Decreased	41.2M	-4.9%	$3.8B	2.7%	$91.06	0
2021-Q3	Decreased	43.4M	-0.7%	$3.1B	2.2%	$69.31	0
2021-Q2	Decreased	43.7M	-3.9%	$3.7B	2.5%	$82.87	0
2021-Q1	Decreased	45.4M	-6.4%	$4B	2.8%	$86.02	0
2020-Q4	Decreased	48.6M	-3.7%	$3.7B	2.7%	$73.31	0
2020-Q3	Decreased	50.4M	-2.0%	$2.4B	2.0%	$45.79	0
2020-Q2	Decreased	51.5M	-3.8%	$2.7B	2.3%	$50.24	0
2020-Q1	Decreased	53.5M	-4.3%	$2.2B	2.2%	$41.01	0
2019-Q4	Decreased	55.9M	-1.3%	$3B	2.2%	$52.44	0
2019-Q3	Decreased	56.6M	-1.9%	$2.4B	1.9%	$41.78	0
2019-Q2	Decreased	57.7M	-0.1%	$2.2B	1.6%	$37.63	0
2019-Q1	Decreased	57.8M	-0.1%	$2.4B	1.8%	$40.30	0
2018-Q4	First report	57.9M	-	$1.8B	1.5%	$30.94	0