Micron Technology, Inc.
US ˙ NasdaqGS ˙ US5951121038

SecurityMU / Micron Technology, Inc.
InstitutionWestpac Banking Corp
Latest Disclosed Ownership14,957 shares
Latest Disclosed Value $ 5,053,073
Westpac Banking Corp reports 20.02% decrease in ownership of MU / Micron Technology, Inc.

On May 11, 2026 - Westpac Banking Corp filed a 13F-HR form disclosing ownership of 14,957 shares of Micron Technology, Inc. (US:MU) valued at $5,053,073 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 18,700 shares of Micron Technology, Inc.. This represents a change in shares of -20.02% during the quarter. The current value of the position is $16,147,128 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 14,957 -3,743 -20.02 5,053 -5.32 0.1760
2026-02-10 2025-12-31 13F MICRON TECHNOLOGY COM 595112103 18,700 -4,386 -19.00 5,337 38.19 0.3371
2025-11-14 2025-09-30 13F/A-1 MICRON TECHNOLOGY INC USD 0.1 COM 595112103 23,086 16,509 251.01 3,863 376.79 0.2394
2025-11-12 2025-09-30 13F MICRON TECHNOLOGY INC USD 0.1 COM 595112103 23,086 16,509 3,863 0.0969
2025-08-11 2025-06-30 13F MICRON TECHNOLOGY COM 595112103 6,577 -755 -10.30 811 27.16 0.0542
2025-05-13 2025-03-31 13F MICRON TECHNOLOGY COM 595112103 7,332 -1,718 -18.98 637 -16.29 0.0469
2025-02-12 2024-12-31 13F MICRON TECHNOLOGY COM 595112103 9,050 -6,044 -40.04 762 -51.37 0.0505
2024-11-08 2024-09-30 13F MICRON TECHNOLOGY COM 595112103 15,094 8,114 116.25 1,565 70.48 0.1049
2024-08-14 2024-06-30 13F/A-1 MICRON TECHNOLOGY COM 595112103 6,980 -435 -5.87 918 5.03 0.0728
2024-08-13 2024-06-30 13F MICRON TECHNOLOGY COM 595112103 132 -7,283 918 0.0316
2024-05-09 2024-03-31 13F MICRON TECHNOLOGY COM 595112103 7,415 -171 -2.25 874 35.09 0.0666
2024-02-08 2023-12-31 13F MICRON TECHNOLOGY COM 595112103 7,586 450 6.31 647 33.40 0.0534
2023-11-13 2023-09-30 13F MICRON TECHNOLOGY COM 595112103 7,136 740 11.57 485 20.35 0.0363
2023-08-10 2023-06-30 13F MICRON TECHNOLOGY COM 595112103 6,396 -256,907 -97.57 404 -97.46 0.0285
2023-05-04 2023-03-31 13F MICRON TECHNOLOGY COM 595112103 263,303 -27,694 -9.52 15,888 9.23 0.2136
2023-02-06 2022-12-31 13F MICRON TECHNOLOGY COM 595112103 290,997 47,457 19.49 14,544 19.20 0.2150
2022-11-08 2022-09-30 13F MICRON TECHNOLOGY COM 595112103 243,540 -111,053 -31.32 12,201 -37.75 0.1860
2022-08-10 2022-06-30 13F MICRON TECHNOLOGY COM 595112103 354,593 82,104 30.13 19,602 -7.65 0.2554
2022-05-11 2022-03-31 13F MICRON TECHNOLOGY COM 595112103 272,489 17,112 6.70 21,224 -10.78 0.2435
2022-02-08 2021-12-31 13F MICRON TECHNOLOGY COM 595112103 255,377 -14,137 -5.25 23,788 24.35 0.2464
2021-10-27 2021-09-30 13F MICRON TECHNOLOGY COM 595112103 269,514 32,730 13.82 19,130 -4.93 0.2045
2021-08-11 2021-06-30 13F MICRON TECHNOLOGY COM 595112103 236,784 21,829 10.16 20,122 6.12 0.2020
2021-05-13 2021-03-31 13F MICRON TECHNOLOGY COM 595112103 214,955 -15,705 -6.81 18,961 9.34 0.2092
2021-02-11 2020-12-31 13F MICRON TECHNOLOGY COM 595112103 230,660 -67,099 -22.53 17,341 24.02 0.1968
2020-11-10 2020-09-30 13F MICRON TECHNOLOGY COM 595112103 297,759 -101,663 -25.45 13,983 -32.05 0.1895
2020-08-12 2020-06-30 13F MICRON TECHNOLOGY COM 595112103 399,422 -8,007 -1.97 20,578 20.09 0.3067
2020-05-14 2020-03-31 13F MICRON TECHNOLOGY COM 595112103 407,429 -900 -0.22 17,136 -21.96 0.2953
2020-02-11 2019-12-31 13F MICRON TECHNOLOGY COM 595112103 408,329 -77,179 -15.90 21,960 5.55 0.2827
2019-11-13 2019-09-30 13F MICRON TECHNOLOGY COM 595112103 485,508 -51,868 -9.65 20,804 0.32 0.2893
2019-08-01 2019-06-30 13F MICRON TECHNOLOGY COM 595112103 537,376 81,781 17.95 20,737 10.13 0.3167
2019-05-14 2019-03-31 13F MICRON TECHNOLOGY COM 595112103 455,595 196,461 75.81 18,830 129.01 0.3108
2019-02-07 2018-12-31 13F MICRON TECHNOLOGY COM 595112103 259,134 -33,789 -11.54 8,222 -37.94 0.1401
2018-11-13 2018-09-30 13F MICRON TECHNOLOGY COM 595112103 292,923 9,990 3.53 13,249 -10.71 0.2271
2018-07-18 2018-06-30 13F MICRON TECHNOLOGY COM 595112103 282,933 -101 -0.04 14,837 0.54 0.2851
2018-05-01 2018-03-31 13F MICRON TECHNOLOGY COM 595112103 283,034 101,154 55.62 14,757 97.34 0.2947
2018-01-18 2017-12-31 13F MICRON TECHNOLOGY COM 595112103 181,880 -11,970 -6.17 7,479 -1.92 0.1699
2017-10-30 2017-09-30 13F MICRON TECHNOLOGY COM 595112103 193,850 3,238 1.70 7,624 33.97 0.1679
2017-08-09 2017-06-30 13F MICRON TECHNOLOGY COM 595112103 190,612 -4,060,629 -95.52 5,692 -95.37 0.1253
2017-05-18 2017-03-31 13F/A-1 MICRON TECHNOLOGY COM 595112103 4,251,241 3,840,791 935.75 122,861 1,152.14 0.9847
2017-05-11 2017-03-31 13F MICRON TECHNOLOGY COM 595112103 3,656,771 113,251
2017-02-09 2016-12-31 13F MICRON TECHNOLOGY COM 595112103 410,450 140,238 51.90 9,813 104.25 0.0925
2016-11-10 2016-09-30 13F MICRON TECHNOLOGY COM 595112103 270,212 -315,272 -53.85 4,804 -37.87 0.0519
2016-08-10 2016-06-30 13F MICRON TECHNOLOGY COM 595112103 585,484 31,413 5.67 7,732 -14.30 0.0846
2016-05-13 2016-03-31 13F MICRON TECHNOLOGY COM 595112103 554,071 -411,295 -42.61 9,023 -34.00 0.0981
2016-02-11 2015-12-31 13F MICRON TECHNOLOGY COM 595112103 965,366 398,854 70.41 13,670 61.12 0.1512
2015-11-16 2015-09-30 13F/A-1 MICRON TECHNOLOGY COM 595112103 566,512 -83,910 -12.90 8,485 -30.76 0.0934
2015-11-12 2015-09-30 13F MICRON TECHNOLOGY COM 595112103 566,512 8,485
2015-08-12 2015-06-30 13F MICRON TECHNOLOGY COM 595112103 650,422 -4,649,229 -87.73 12,254 -91.57 0.1198
2015-05-12 2015-03-31 13F MICRON TECHNOLOGY COM 595112103 5,299,651 1,338,556 33.79 145,428 4.87 1.2634
2015-02-11 2014-12-31 13F MICRON TECHNOLOGY COM 595112103 3,961,095 377,975 10.55 138,678 12.97 1.3193
2014-11-12 2014-09-30 13F MICRON TECHNOLOGY COM 595112103 3,583,120 93,598 2.68 122,758 6.76 1.1964
2014-08-11 2014-06-30 13F MICRON TECHNOLOGY COM 595112103 3,489,522 -702,970 -16.77 114,980 15.91 1.1077
2014-05-12 2014-03-31 13F MICRON TECHNOLOGY COM 595112103 4,192,492 285,801 7.32 99,194 16.74 1.0564
2014-02-13 2013-12-31 13F MICRON TECHNOLOGY COM 595112103 3,906,691 3,843,144 6,047.72 84,971 7,555.05 0.9721
2013-11-12 2013-09-30 13F MICRON TECHNOLOGY COM 595112103 63,547 -8,565 -11.88 1,110 18.84 0.0139
2013-08-14 2013-06-30 13F MICRON TECHNOLOGY COM 595112103 72,112 72,112 935 0.0143
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.