ALLIANT ENERGY CORP (LNT) Stock Institutional Trading Activity


ALLIANT ENERGY CORP (LNT) 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, Mairs & Power Growth Fund, and Sequoia Financial Advisors. 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 2022Renaissance Technologies LLCBuy54,500115,750$7,232
Q1 2022Mairs & Power Growth FundSell-1,153773,831$48,349
Q4 2021Renaissance Technologies LLCSell-311,65061,250$3,765
Q4 2021Mairs & Power Growth FundSell-1,911774,984$47,638
Q3 2021Renaissance Technologies LLCBuy254,900372,900$20,875
Q3 2021Mairs & Power Growth FundBuy4,814776,895$43,491
Q2 2021Renaissance Technologies LLCSell-257,200118,000$6,580
Q2 2021Mairs & Power Growth FundBuy28,123772,081$43,051
Q1 2021Mairs & Power Growth FundBuy228,737743,958$40,293
Q4 2020Mairs & Power Growth FundBuy290,297515,221$26,549
Q3 2020Mairs & Power Growth FundBuy219,306224,924$11,617
Q3 2020Renaissance Technologies LLCSell-536,104375,200$19,379
Q2 2020Renaissance Technologies LLCSell-340,100911,304$43,597
Q1 2020Renaissance Technologies LLCBuy646,3761,251,404$60,430
Q4 2019Renaissance Technologies LLCSell-1,336,776605,028$33,107
Q3 2019Renaissance Technologies LLCSell-84,2001,941,804$104,721
Q2 2019Mairs & Power Growth FundSell-1,6105,618$276
Q2 2019Renaissance Technologies LLCSell-941,3002,026,004$99,436
Q1 2019Renaissance Technologies LLCBuy285,0002,967,304$139,849
Q4 2018Renaissance Technologies LLCBuy913,1912,682,304$113,327
Q3 2018Mairs & Power Growth FundSell-3697,228$308
Q3 2018Renaissance Technologies LLCBuy508,4131,769,113$75,311
Q2 2018Mairs & Power Growth FundBuy3697,597$322
Q1 2018Renaissance Technologies LLCSell-51,1001,260,700$51,512
Q4 2017Renaissance Technologies LLCBuy392,1001,311,800$55,896
Q3 2017Mairs & Power Growth FundSell-1,5007,228$300
Q3 2017Renaissance Technologies LLCBuy419,300919,700$38,232
Q2 2017Renaissance Technologies LLCBuy456,500500,400$20,101
Q1 2017Renaissance Technologies LLCBuy20,60043,900$1,739
Q2 2016Mairs & Power Growth FundBuy4,3648,728$347

Frequently asked questions about LNT activity

  • Which institutional owners are buying LNT?

    Institutional owners buying LNT 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 LNT activity?

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

  • Is institutional interest in LNT increasing?

    Institutional interest in LNT 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.