FONAR CORP (FONR) Stock Institutional Trading Activity


FONAR CORP (FONR) 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. 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
Q4 2025Renaissance Technologies LLCBuy7,100315,716$5,859,689
Q3 2025Renaissance Technologies LLCSell-6,900308,616$4,647,757
Q2 2025Renaissance Technologies LLCBuy11,100315,516$4,720,119
Q1 2025Renaissance Technologies LLCSell-9,300304,416$4,264,868
Q4 2024Renaissance Technologies LLCSell-19,800313,716$4,749,660
Q3 2024Renaissance Technologies LLCSell-10,700333,516$5,399,624
Q2 2024Renaissance Technologies LLCBuy35,375344,216$5,507,456
Q1 2024Renaissance Technologies LLCBuy5,704308,841$6,597
Q4 2023Renaissance Technologies LLCSell-4,779303,137$5,929
Q3 2023Renaissance Technologies LLCSell-11,700307,916$4,742
Q2 2023Renaissance Technologies LLCSell-9,200319,616$5,465
Q1 2023Renaissance Technologies LLCSell-9,600328,816$5,327
Q4 2022Renaissance Technologies LLCSell-7,200338,416$5,668
Q3 2022Renaissance Technologies LLCSell-37,100345,616$4,890
Q2 2022Renaissance Technologies LLCSell-3,400382,716$5,813
Q1 2022Renaissance Technologies LLCSell-18,500386,116$7,162
Q4 2021Renaissance Technologies LLCSell-27,200404,616$6,061
Q3 2021Renaissance Technologies LLCSell-58,000431,816$6,676
Q2 2021Renaissance Technologies LLCSell-3,000489,816$8,660
Q1 2021Renaissance Technologies LLCSell-300492,816$8,915
Q4 2020Renaissance Technologies LLCBuy40,400493,116$8,560
Q3 2020Renaissance Technologies LLCSell-22,775452,716$9,453
Q2 2020Renaissance Technologies LLCSell-33,725475,491$10,161
Q1 2020Renaissance Technologies LLCSell-35,500509,216$7,445
Q4 2019Renaissance Technologies LLCBuy13,064544,716$10,725
Q3 2019Renaissance Technologies LLCBuy13,436531,652$10,989
Q2 2019Renaissance Technologies LLCBuy21,000518,216$11,147
Q1 2019Renaissance Technologies LLCBuy5,700497,216$10,178
Q4 2018Renaissance Technologies LLCSell-3,700491,516$9,948
Q3 2018Renaissance Technologies LLCBuy46,896495,216$12,331

Frequently asked questions about FONR activity

  • Which institutional owners are buying FONR?

    Institutional owners buying FONR 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 FONR activity?

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

  • Is institutional interest in FONR increasing?

    Institutional interest in FONR 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.