마이크론 테크놀로지, Inc.
MX ˙ BMV ˙ LU1650489385
SecurityMX:MU / Micron Technology, Inc.
InstitutionBanco Santander, S.A.
Latest Disclosed Ownership203,010 shares
Latest Disclosed Value $ 68,584,899
Banco Santander, S.A. reports 11.71% decrease in ownership of MU / Micron Technology, Inc.

On May 8, 2026 - Banco Santander, S.A. filed a 13F-HR form disclosing ownership of 203,010 shares of Micron Technology, Inc. (MX:MU) valued at $68,584,899 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 229,933 shares of Micron Technology, Inc.. This represents a change in shares of -11.71% during the quarter.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F MICRON TECHNOLOGY COM 595112103 203,010 -26,923 -11.71 68,585 4.51 0.3241
2026-02-13 2025-12-31 13F MICRON TECHNOLOGY COM 595112103 229,933 146,274 174.85 65,625 368.85 0.4914
2025-11-12 2025-09-30 13F MICRON TECHNOLOGY COM 595112103 83,659 12,607 17.74 13,998 59.84 0.1243
2025-08-01 2025-06-30 13F MICRON TECHNOLOGY COM 595112103 71,052 -12,943 -15.41 8,757 19.99 0.0832
2025-05-09 2025-03-31 13F MICRON TECHNOLOGY COM 595112103 83,995 -141,676 -62.78 7,298 -61.57 0.0805
2025-02-07 2024-12-31 13F MICRON TECHNOLOGY COM 595112103 225,671 61,293 37.29 18,992 11.41 0.2285
2024-11-12 2024-09-30 13F MICRON TECHNOLOGY COM 595112103 164,378 46,203 39.10 17,048 9.68 0.2009
2024-07-29 2024-06-30 13F MICRON TECHNOLOGY COM 595112103 118,175 23,376 24.66 15,544 39.09 0.1926
2024-05-10 2024-03-31 13F MICRON TECHNOLOGY COM 595112103 94,799 46,488 96.23 11,176 171.11 0.1347
2024-02-09 2023-12-31 13F MICRON TECHNOLOGY COM 595112103 48,311 -27,013 -35.86 4,123 -19.56 0.0487
2023-11-08 2023-09-30 13F MICRON TECHNOLOGY COM 595112103 75,324 -20,280 -21.21 5,124 -15.07 0.0726
2023-08-14 2023-06-30 13F MICRON TECHNOLOGY COM 595112103 95,604 46,446 94.48 6,034 103.41 0.0791
2023-05-10 2023-03-31 13F MICRON TECHNOLOGY COM 595112103 49,158 -2,952 -5.66 2,966 13.90 0.0444
2023-02-13 2022-12-31 13F MICRON TECHNOLOGY COM 595112103 52,110 -1,703 -3.16 2,604 -3.41 0.0391
2022-11-08 2022-09-30 13F MICRON TECHNOLOGY COM 595112103 53,813 2,400 4.67 2,696 -5.14 0.0360
2022-07-28 2022-06-30 13F MICRON TECHNOLOGY COM 595112103 51,413 15,370 42.64 2,842 1.25 0.0379
2022-05-09 2022-03-31 13F MICRON TECHNOLOGY COM 595112103 36,043 14,953 70.90 2,807 42.92 0.0301
2022-02-09 2021-12-31 13F MICRON TECHNOLOGY COM 595112103 21,090 -350 -1.63 1,964 29.04 0.0106
2021-11-08 2021-09-30 13F MICRON TECHNOLOGY COM 595112103 21,440 9,964 86.82 1,522 56.10 0.0082
2021-07-29 2021-06-30 13F MICRON TECHNOLOGY COM 595112103 11,476 -48,659 -80.92 975 -81.62 0.0054
2021-05-10 2021-03-31 13F MICRON TECHNOLOGY COM 595112103 60,135 -7,089 -10.55 5,305 4.99 0.0374
2021-02-12 2020-12-31 13F MICRON TECHNOLOGY COM 595112103 67,224 19,256 40.14 5,053 124.38 0.0362
2020-11-09 2020-09-30 13F MICRON TECHNOLOGY COM 595112103 47,968 5,415 12.73 2,252 2.74 0.0296
2020-08-05 2020-06-30 13F MICRON TECHNOLOGY COM 595112103 42,553 -731,267 -94.50 2,192 -93.26 0.0284
2020-05-11 2020-03-31 13F MICRON TECHNOLOGY COM 595112103 773,820 -2,478 -0.32 32,546 -22.04 0.3726
2020-02-07 2019-12-31 13F MICRON TECHNOLOGY COM 595112103 776,298 337,568 76.94 41,749 122.08 0.3856
2019-11-06 2019-09-30 13F MICRON TECHNOLOGY COM 595112103 438,730 438,730 18,799 0.1828
2019-05-13 2019-03-31 13F MICRON TECHNOLOGY COM 595112103 0 -9,791 -100.00 0 -100.00
2019-02-12 2018-12-31 13F MICRON TECHNOLOGY COM 595112103 9,791 3,364 52.34 311 6.87 0.0039
2018-11-13 2018-09-30 13F MICRON TECHNOLOGY COM 595112103 6,427 -6,128 -48.81 291 -55.78 0.0033
2018-08-14 2018-06-30 13F MICRON TECHNOLOGY COM 595112103 12,555 -720,650 -98.29 658 -98.28 0.0077
2018-05-14 2018-03-31 13F MICRON TECHNOLOGY COM 595112103 733,205 724,108 7,959.85 38,229 10,121.66 0.4472
2018-02-14 2017-12-31 13F MICRON TECHNOLOGY COM 595112103 9,097 0 0.00 374 45.53 0.0054
2017-11-13 2017-09-30 13F MICRON TECHNOLOGY COM 595112103 9,097 -70,000 -88.50 257 -85.82 0.0042
2017-08-11 2017-06-30 13F MICRON TECHNOLOGY COM 595112103 79,097 -5,000 -5.95 1,812 -14.93 0.0356
2017-05-12 2017-03-31 13F MICRON TECHNOLOGY COM 595112103 84,097 1,600 1.94 2,130 25.81 0.0549
2017-02-17 2016-12-31 13F/A-1 MICRON TECHNOLOGY COM 595112103 82,497 82,497 1,693 0.0446
2017-02-14 2016-12-31 13F MICRON TECHNOLOGY COM 595112103 82,497 1,693
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.