GENERAC HOLDINGS INC (GNRC) Stock Institutional Trading Activity


GENERAC HOLDINGS INC (GNRC) 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 Matrix Advisors Value Fund, Renaissance Technologies LLC, Ariel Appreciation Fund, Disciplined Growth Investors, and Mairs & Power Growth 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
Q3 2019Mairs & Power Growth FundSell-51,410634,405$49,699
Q3 2019Olstein Capital ManagementBuy21,000124,000$9,714
Q3 2019Renaissance Technologies LLCBuy144,900157,100$12,307
Q3 2019Ariel Appreciation FundBuy43,643473,837$37,120
Q2 2019Mairs & Power Growth FundBuy6,983685,815$47,602
Q2 2019Renaissance Technologies LLCSell-333,50012,200$847
Q2 2019Olstein Capital ManagementSell-39,000103,000$7,149
Q2 2019Ariel Appreciation FundBuy105,671430,194$29,860
Q1 2019Mairs & Power Growth FundBuy2,992678,832$34,777
Q1 2019Olstein Capital ManagementBuy2,000142,000$7,275
Q1 2019Renaissance Technologies LLCBuy163,100345,700$17,710
Q1 2019Ariel Appreciation FundBuy324,523324,523$16,625
Q4 2018Mairs & Power Growth FundSell-67,825675,840$33,589
Q4 2018Renaissance Technologies LLCBuy133,000182,600$9,075
Q3 2018Mairs & Power Growth FundSell-30,390743,665$41,950
Q3 2018Renaissance Technologies LLCSell-233,00049,600$2,798
Q3 2018Olstein Capital ManagementBuy5,000140,000$7,897
Q2 2018Mairs & Power Growth FundSell-77,780774,055$40,042
Q2 2018Olstein Capital ManagementBuy135,000135,000$6,984
Q1 2018Mairs & Power Growth FundSell-29,890851,835$39,108
Q1 2018Renaissance Technologies LLCBuy4,800282,600$12,974
Q4 2017Mairs & Power Growth FundSell-85,740881,725$43,663
Q4 2017Renaissance Technologies LLCBuy166,400277,800$13,757
Q3 2017Mairs & Power Growth FundSell-45,881967,465$44,436
Q3 2017Renaissance Technologies LLCSell-121,400111,400$5,117
Q2 2017Mairs & Power Growth FundBuy42,5401,013,346$36,612
Q2 2017Renaissance Technologies LLCBuy79,300232,800$8,411
Q1 2017Mairs & Power Growth FundBuy111,190970,806$36,192
Q4 2016Mairs & Power Growth FundSell-11,740859,616$35,021
Q3 2016Mairs & Power Growth FundBuy40,580871,356$31,630

Frequently asked questions about GNRC activity

  • Which institutional owners are buying GNRC?

    Institutional owners buying GNRC 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 GNRC activity?

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

  • Is institutional interest in GNRC increasing?

    Institutional interest in GNRC 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.