Micron Technology, Inc.
US ˙ NasdaqGS ˙ US5951121038

SecurityMU / Micron Technology, Inc.
InstitutionBoston Partners
Latest Disclosed Ownership2,802,923 shares
Latest Disclosed Value $ 951,387,703
Boston Partners reports 20.60% decrease in ownership of MU / Micron Technology, Inc.

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 2,802,923 shares of Micron Technology, Inc. (US:MU) valued at $946,939,506 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,530,111 shares of Micron Technology, Inc.. This represents a change in shares of -20.60% during the quarter. The current value of the position is $3,025,951,583 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F MICRON TECHNOLOGY COM 595112103 2,802,923 -727,188 -20.60 951,388 -6.43 0.4258
2026-02-13 2025-12-31 13F MICRON TECHNOLOGY COM 595112103 3,530,111 -1,775,952 -33.47 1,016,734 13.62 1.0527
2025-11-13 2025-09-30 13F MICRON TECHNOLOGY COM 595112103 5,306,063 550,284 11.57 894,884 53.41 0.9188
2025-08-12 2025-06-30 13F/A-1 MICRON TECHNOLOGY COM 595112103 4,755,779 -127,333 -2.61 583,313 38.72 0.6478
2025-08-07 2025-06-30 13F MICRON TECHNOLOGY COM 595112103 4,745,955 -137,157 582,102 0.2673
2025-05-13 2025-03-31 13F MICRON TECHNOLOGY COM 595112103 4,883,112 -440,012 -8.27 420,496 -7.55 0.5085
2025-02-11 2024-12-31 13F MICRON TECHNOLOGY COM 595112103 5,323,124 -428,193 -7.45 454,822 -23.93 0.5532
2024-11-12 2024-09-30 13F MICRON TECHNOLOGY COM 595112103 5,751,317 2,188,592 61.43 597,908 27.50 0.7057
2024-08-14 2024-06-30 13F MICRON TECHNOLOGY COM 595112103 3,562,725 -973,558 -21.46 468,937 -12.21 0.5826
2024-05-28 2024-03-31 13F/A-1 MICRON TECHNOLOGY COM 595112103 4,536,283 61,127 1.37 534,189 39.61 0.6363
2024-05-13 2024-03-31 13F MICRON TECHNOLOGY COM 595112103 4,536,283 61,127 534,189 0.2643
2024-02-07 2023-12-31 13F MICRON TECHNOLOGY COM 595112103 4,475,156 -297,396 -6.23 382,640 17.98 0.5068
2023-11-08 2023-09-30 13F MICRON TECHNOLOGY COM 595112103 4,772,552 -518,717 -9.80 324,338 -3.00 0.4490
2023-08-10 2023-06-30 13F MICRON TECHNOLOGY COM 595112103 5,291,269 825,864 18.49 334,360 23.85 0.4501
2023-05-09 2023-03-31 13F MICRON TECHNOLOGY COM 595112103 4,465,405 -81,579 -1.79 269,981 17.20 0.3712
2023-02-08 2022-12-31 13F MICRON TECHNOLOGY COM 595112103 4,546,984 713,525 18.61 230,359 19.43 0.3116
2022-11-09 2022-09-30 13F MICRON TECHNOLOGY COM 595112103 3,833,459 -963,299 -20.08 192,881 -27.69 0.2823
2022-08-10 2022-06-30 13F MICRON TECHNOLOGY COM 595112103 4,796,758 -1,689,887 -26.05 266,749 -47.11 0.3728
2022-05-10 2022-03-31 13F MICRON TECHNOLOGY COM 595112103 6,486,645 689 0.01 504,309 -16.57 0.6109
2022-02-04 2021-12-31 13F MICRON TECHNOLOGY COM 595112103 6,485,956 -756,431 -10.44 604,490 17.60 0.7281
2021-11-05 2021-09-30 13F MICRON TECHNOLOGY COM 595112103 7,242,387 449,491 6.62 514,021 -10.86 0.6512
2021-08-12 2021-06-30 13F MICRON TECHNOLOGY COM 595112103 6,792,896 508,328 8.09 576,674 4.06 0.7354
2021-05-10 2021-03-31 13F MICRON TECHNOLOGY COM 595112103 6,284,568 539,736 9.40 554,198 28.32 0.7432
2021-02-10 2020-12-31 13F/A-1 MICRON TECHNOLOGY COM 595112103 5,744,832 -1,401,655 -19.61 431,896 28.69 0.6717
2021-02-04 2020-12-31 13F MICRON TECHNOLOGY COM 595112103 5,744,832 -1,401,655 431,896 259,111.9287
2020-11-13 2020-09-30 13F/A-1 MICRON TECHNOLOGY COM 595112103 7,146,487 -407,561 -5.40 335,600 -13.74 0.6111
2020-11-09 2020-09-30 13F MICRON TECHNOLOGY COM 595112103 7,554,048 0 389,044 285,604.6398
2020-08-12 2020-06-30 13F MICRON TECHNOLOGY COM 595112103 7,554,048 -75,346 -0.99 389,044 21.29 0.7146
2020-05-13 2020-03-31 13F MICRON TECHNOLOGY COM 595112103 7,629,394 -11,676 -0.15 320,748 -21.97 0.6370
2020-02-06 2019-12-31 13F/A-1 MICRON TECHNOLOGY COM 595112103 7,641,070 7,562,741 9,655.10 411,055 12,144.71 0.5437
2020-02-05 2019-12-31 13F MICRON TECHNOLOGY COM 595112103 7,641,070 7,562,741 411,055 231,107.1266
2019-11-20 2019-09-30 13F/A-1 MICRON TECHNOLOGY COM 595112103 78,329 -8,279 -9.56 3,357 0.45 0.0045
2019-11-08 2019-09-30 13F MICRON TECHNOLOGY COM 595112103 86,608 0 3,342 0.0044
2019-08-26 2019-06-30 13F/A-1 MICRON TECHNOLOGY COM 595112103 86,608 86,608 10.57 3,342 -0.45 0.0044
2019-08-09 2019-06-30 13F MICRON TECHNOLOGY COM 595112103 86,608 86,608 3,342
2019-02-07 2018-12-31 13F MICRON TECHNOLOGY COM 595112103 0 -8,836 -100.00 0 -100.00
2018-11-14 2018-09-30 13F MICRON TECHNOLOGY COM 595112103 8,836 8,836 400 0.0005
2018-08-03 2018-06-30 13F MICRON TECHNOLOGY COM 595112103 0 -21,335 -100.00 0 -100.00
2018-05-04 2018-03-31 13F MICRON TECHNOLOGY COM 595112103 21,335 1,402 7.03 1,112 35.61 0.0013
2018-02-14 2017-12-31 13F/A-1 MICRON TECHNOLOGY COM 595112103 19,933 -701 -3.40 820 0.99 0.0010
2018-02-01 2017-12-31 13F MICRON TECHNOLOGY COM 595112103 19,933 -701 820
2017-11-02 2017-09-30 13F MICRON TECHNOLOGY COM 595112103 20,634 20,634 812 0.0010
2016-08-05 2016-06-30 13F MICRON TECHNOLOGY COM 595112103 0 -314,800 -100.00 0 -100.00
2016-05-12 2016-03-31 13F MICRON TECHNOLOGY COM 595112103 314,800 0 0.00 3,296 -26.07 0.0049
2016-02-08 2015-12-31 13F MICRON TECHNOLOGY COM 595112103 314,800 0 0.00 4,458 -5.47 0.0064
2015-11-10 2015-09-30 13F MICRON TECHNOLOGY COM 595112103 314,800 0 0.00 4,716 -20.49 0.0072
2015-08-10 2015-06-30 13F MICRON TECHNOLOGY COM 595112103 314,800 169,700 116.95 5,931 50.65 0.0085
2015-05-05 2015-03-31 13F MICRON TECHNOLOGY COM 595112103 145,100 145,100 3,937 0.0059
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.