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PRIMECAP MANAGEMENT CO/CA/

Position in MU — Micron Technology Inc

CIK 763212 PASADENA, CA

Position in MU

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$22,182,263,342
+$14,792,282,263 QoQ
Shares Held
19,217,236
-12.1% QoQ
Ownership
1.70%
of shares outstanding
% of Portfolio
13.12%
of 13F equity value
Holder Rank
#10
of 3,891 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 98% Shared 0% None 2%

Common Shares in MU Over Time

Shares Held

Position Value (USD)

Position in Semiconductors

Technology · as of Jun 30, 2026

PRIMECAP MANAGEMENT CO/CA/ holds $41,979,934,431 across 16 Semiconductors names. MU ranks #1 (52.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 MU
Micron Technology Inc
This page
19,217,236 $22,182,263,342

All Filings in MU

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $22,182,263,342 19,217,236
2026-03-31 $7,389,981,079 21,874,204
2025-12-31 $7,076,722,683 24,794,936
2025-09-30 $4,961,947,384 29,655,435
2025-06-30 $3,878,169,217 31,465,876
2025-03-31 $3,239,325,931 37,280,768
2024-12-31 $3,164,118,157 37,596,461
2024-09-30 $3,902,800,200 37,631,860
2024-06-30 $4,922,557,732 37,425,361
2024-03-31 $4,433,779,475 37,609,462
2023-12-31 $3,199,525,548 37,491,511
2023-09-30 $2,560,574,435 37,638,901
2023-06-30 $2,399,109,673 38,014,731
2023-03-31 $2,350,239,198 38,949,937
2022-12-31 $1,986,185,058 39,739,597
2022-09-30 $2,025,749,762 40,434,127
2022-06-30 $2,234,429,540 40,420,216
2022-03-31 $3,180,138,563 40,828,586
2021-12-31 $3,838,774,469 41,210,676
2021-09-30 $3,077,277,283 43,354,146
2021-06-30 $3,709,569,309 43,652,263
2021-03-31 $4,007,255,835 45,428,589
2020-12-31 $3,650,008,471 48,550,259
2020-09-30 $2,367,136,622 50,407,509
2020-06-30 $2,651,460,262 51,464,679
2020-03-31 $2,248,839,222 53,467,409