MICRON TECHNOLOGY INC (MU) Stock Institutional Trading Activity


MICRON TECHNOLOGY INC (MU) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Appaloosa Management, Cullen Value Fund, Donald Smith & Co., and Parnassus Endeavor Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2018Renaissance Technologies LLCSell-6,502,400228,536$11,916
Q1 2018Greenlight CapitalSell-57,1003,347,000$174,513
Q1 2018Appaloosa ManagementBuy7,905,00035,405,000$1,846,017
Q4 2017Donald Smith & Co.Sell-1,300,17010,809,677$444,494
Q4 2017Sound Shore ManagementBuy3,079,2483,079,248$126,619
Q4 2017Parnassus Endeavor FundSell-1,100,0003,900,000$160,368
Q4 2017Greenlight CapitalSell-1,617,8003,404,100$139,976
Q4 2017Appaloosa ManagementBuy10,446,00127,500,000$1,130,800
Q3 2017Donald Smith & Co.Sell-1,239,40312,109,847$476,280
Q3 2017Parnassus Endeavor FundSell-1,775,0005,000,000$196,650
Q3 2017Greenlight CapitalBuy2,371,9005,021,900$197,511
Q3 2017Renaissance Technologies LLCBuy5,886,2006,730,936$264,728
Q3 2017Appaloosa ManagementBuy4,153,99917,053,999$670,734
Q2 2017Donald Smith & Co.Sell-432,99413,349,250$398,609
Q2 2017Parnassus Endeavor FundSell-2,495,1936,775,000$202,302
Q2 2017Greenlight CapitalBuy1,050,0002,650,000$79,129
Q2 2017Appaloosa ManagementBuy6,210,00012,900,000$385,194
Q1 2017Donald Smith & Co.Sell-996,77613,782,244$398,307
Q1 2017Parnassus Endeavor FundSell-18,977,4299,270,193$266,413
Q1 2017Atlantic Investment ManagementBuy153,122153,122$4,425
Q1 2017Greenlight CapitalSell-10,771,9801,600,000$46,240
Q1 2017Appaloosa ManagementBuy3,440,0006,690,000$193,341
Q4 2016Donald Smith & Co.Sell-468,98614,779,020$323,956
Q4 2016Parnassus Endeavor FundBuy189,46628,247,622$619,188
Q4 2016Renaissance Technologies LLCBuy792,436844,736$18,517
Q4 2016Appaloosa ManagementBuy3,250,0003,250,000$71,240
Q3 2016Donald Smith & Co.Sell-1,82615,248,006$271,110
Q3 2016Parnassus Endeavor FundBuy133,61328,058,156$498,874
Q3 2016Renaissance Technologies LLCSell-3,930,50052,300$930
Q2 2016Donald Smith & Co.Buy629,19315,249,832$209,838

Frequently asked questions about MU activity

  • Which institutional owners are buying MU?

    Institutional owners buying MU include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MU activity?

    "Buy" means an investor increased their reported position in MU compared to the prior reporting period. This reflects growing exposure to MICRON TECHNOLOGY INC (MU) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MU increasing?

    Institutional interest in MU can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.