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
Q1 2018Renaissance Technologies LLCSell-15,296448,320$13,360
Q4 2017Renaissance Technologies LLCBuy7,000463,616$11,289
Q3 2017Renaissance Technologies LLCSell-607456,616$13,927
Q2 2017Renaissance Technologies LLCSell-19,493457,223$12,688
Q1 2017Renaissance Technologies LLCSell-3,738476,716$8,366
Q4 2016Renaissance Technologies LLCBuy20,638480,454$9,201
Q3 2016Renaissance Technologies LLCBuy73,600459,816$9,445
Q2 2016Renaissance Technologies LLCBuy80,500386,216$7,863
Q1 2016Renaissance Technologies LLCBuy14,800305,716$4,702
Q4 2015Renaissance Technologies LLCBuy72,200290,916$5,021
Q3 2015Renaissance Technologies LLCSell-31,926218,716$2,933
Q2 2015Renaissance Technologies LLCBuy5,124250,642$2,651
Q1 2015Renaissance Technologies LLCBuy9,865245,518$3,201
Q4 2014Renaissance Technologies LLCSell-23,611235,653$2,451
Q3 2014Renaissance Technologies LLCSell-26,877259,264$2,854
Q2 2014Renaissance Technologies LLCSell-91,375286,141$3,491
Q1 2014Renaissance Technologies LLCSell-148,800377,516$6,637
Q4 2013Renaissance Technologies LLCBuy30,100526,316$11,162
Q3 2013Renaissance Technologies LLCBuy2,673496,216$2,863
Q2 2013Renaissance Technologies LLCBuy493,543493,543$3,238

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.