Micron Technology, Inc.
MX ˙ BMV ˙ LU1650489385
SecurityMX:MU / Micron Technology, Inc.
InstitutionFlagship Harbor Advisors, Llc
Latest Disclosed Ownership13,005 shares
Latest Disclosed Value $ 4,393,518
Flagship Harbor Advisors, Llc ownership in MU / Micron Technology, Inc.

On April 28, 2026 - Flagship Harbor Advisors, Llc filed a 13F-HR form disclosing ownership of 13,005 shares of Micron Technology, Inc. (MX:MU) valued at $4,393,518 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 13,469 shares of Micron Technology, Inc.. This represents a change in shares of -3.44% during the quarter.

Flagship Harbor Advisors, Llc has a history of taking positions in derivatives of the underlying security (MU) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:MU / Micron Technology, Inc. Historical Put/Call Ratio
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)
2026-04-28 2026-03-31 13F MICRON TECHNOLOGY COM 595112103 13,005 -464 -3.44 4,394 14.28 0.1932
2026-01-21 2025-12-31 13F MICRON TECHNOLOGY Common Stock 595112103 13,469 -2,642 -16.40 3,844 42.63 0.1814
2025-11-05 2025-09-30 13F MICRON TECHNOLOGY COM 595112103 16,111 1,422 9.68 2,696 48.90 0.1173
2025-08-04 2025-06-30 13F MICRON TECHNOLOGY COM 595112103 14,689 7 0.05 1,810 41.96 0.0858
2025-04-22 2025-03-31 13F MICRON TECHNOLOGY COM 595112103 14,682 324 2.26 1,276 5.55 0.0671
2025-01-21 2024-12-31 13F MICRON TECHNOLOGY COM 595112103 14,358 -2,540 -15.03 1,208 -31.05 0.0635
2024-10-21 2024-09-30 13F MICRON TECHNOLOGY COM 595112103 16,898 1,712 11.27 1,752 -12.27 0.0962
2025-12-02 2024-06-30 13F MICRON TECHNOLOGY COM 595112103 15,186 5,744 60.83 1,997 79.42 0.1201
2024-04-16 2024-03-31 13F MICRON TECHNOLOGY COM 595112103 9,442 1,306 16.05 1,113 60.37 0.0715
2024-01-10 2023-12-31 13F MICRON TECHNOLOGY COM 595112103 8,136 -59 -0.72 694 24.60 0.0505
2023-10-17 2023-09-30 13F MICRON TECHNOLOGY COM 595112103 8,195 -1,618 -16.49 558 -10.02 0.0464
2023-07-11 2023-06-30 13F MICRON TECHNOLOGY COM 595112103 9,813 622 6.77 619 11.73 0.0512
2023-04-12 2023-03-31 13F MICRON TECHNOLOGY COM 595112103 9,191 601 7.00 555 29.14 0.0522
2023-01-13 2022-12-31 13F MICRON TECHNOLOGY COM 595112103 8,590 -1,852 -17.74 429 -17.97 0.0440
2022-10-13 2022-09-30 13F MICRON TECHNOLOGY COM 595112103 10,442 324 3.20 523 -6.44 0.0607
2022-07-13 2022-06-30 13F MICRON TECHNOLOGY COM 595112103 10,118 1,440 16.59 559 -17.31 0.0628
2022-04-13 2022-03-31 13F MICRON TECHNOLOGY COM 595112103 8,678 271 3.22 676 -13.67 0.0651
2022-02-17 2021-12-31 13F/A-1 MICRON TECHNOLOGY COM 595112103 8,407 3,316 65.13 783 80.83 0.0741
2022-02-10 2021-12-31 13F MICRON TECHNOLOGY COM 595112103 8,407 3,316 783 0.0741
2021-11-01 2021-09-30 13F MICRON TECHNOLOGY COM 595112103 5,091 0 0.00 433 0.00 0.0465
2021-07-26 2021-06-30 13F MICRON TECHNOLOGY COM 595112103 5,091 194 3.96 433 0.23 0.0464
2021-05-03 2021-03-31 13F MICRON TECHNOLOGY COM 595112103 4,897 622 14.55 432 34.58 0.0490
2021-02-08 2020-12-31 13F MICRON TECHNOLOGY COM 595112103 4,275 616 16.84 321 87.72 0.0398
2020-10-13 2020-09-30 13F MICRON TECHNOLOGY Common Stock 595112103 3,659 633 20.92 171 10.32 0.0231
2020-07-31 2020-06-30 13F MICRON TECHNOLOGY Common Stock 595112103 3,026 174 6.10 155 29.17 0.0228
2020-05-12 2020-03-31 13F MICRON TECHNOLOGY Common Stock 595112103 2,852 1,325 86.77 120 46.34 0.0240
2020-02-14 2019-12-31 13F MICRON TECHNOLOGY Common Stock 595112103 1,527 0 0.00 82 26.15 0.0144
2019-10-22 2019-09-30 13F MICRON TECHNOLOGY Common Stock 595112103 1,527 -326 -17.59 65 -8.45 0.0127
2019-07-22 2019-06-30 13F MICRON TECHNOLOGY Common Stock 595112103 1,853 -4,304 -69.90 71 -72.05 0.0147
2019-04-15 2019-03-31 13F MICRON TECHNOLOGY Common Stock 595112103 6,157 -743 -10.77 254 16.51 0.0522
2019-01-26 2018-12-31 13F MICRON TECHNOLOGY COM 595112103 6,900 -467 -6.34 218 -34.53 0.0530
2018-11-05 2018-09-30 13F MICRON TECHNOLOGY Common Stock 595112103 7,367 963 15.04 333 -0.60 0.0618
2018-08-14 2018-06-30 13F MICRON TECHNOLOGY Common Stock 595112103 6,404 6,404 335 0.0670
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2019-04-15 2019-03-31 13F MICRON TECH Listed Options Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-01-26 2018-12-31 13F MICRON TECH Listed Options Call 10 1 n/a n/a n/a
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.