MEDIFAST INC (MED) Stock Institutional Trading Activity


MEDIFAST INC (MED) 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, Miller Value Partners, Engaged Capital, and Polen Capital Management. 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 2020Renaissance Technologies LLCSell-39,305893,910$55,869
Q4 2019Polen Capital ManagementBuy7735,636$618
Q4 2019Miller Value PartnersBuy244,609924,124$101,266
Q4 2019Renaissance Technologies LLCBuy10,600933,215$102,262
Q4 2019Engaged CapitalBuy1,149,1341,160,376$127,154
Q3 2019Polen Capital ManagementBuy184,863$504
Q3 2019Miller Value PartnersBuy679,515679,515$70,418
Q3 2019Renaissance Technologies LLCBuy232,300922,615$95,611
Q2 2019Polen Capital ManagementBuy3864,845$622
Q2 2019Renaissance Technologies LLCSell-160,085690,315$88,567
Q1 2019Polen Capital ManagementBuy4,4594,459$569
Q1 2019Engaged CapitalSell-253,30711,242$1,434
Q1 2019Renaissance Technologies LLCSell-139,600850,400$108,469
Q4 2018Renaissance Technologies LLCBuy31,600990,000$123,770
Q3 2018Renaissance Technologies LLCSell-34,200958,400$212,334
Q1 2018Renaissance Technologies LLCBuy36,200992,600$92,758
Q4 2017Engaged CapitalSell-525,000264,549$18,468
Q4 2017Renaissance Technologies LLCSell-700956,400$66,766
Q3 2017Renaissance Technologies LLCBuy1,000957,100$56,823
Q2 2017Renaissance Technologies LLCBuy2,100956,100$39,649
Q1 2017Engaged CapitalBuy17,084789,549$35,032
Q1 2017Renaissance Technologies LLCBuy2,500954,000$42,329
Q4 2016Engaged CapitalBuy35,000772,465$32,158
Q4 2016Renaissance Technologies LLCBuy4,300951,500$39,611
Q3 2016Renaissance Technologies LLCSell-6,400947,200$35,795
Q2 2016Renaissance Technologies LLCBuy125,700953,600$31,726
Q1 2016Renaissance Technologies LLCBuy81,600827,900$24,994
Q4 2015Renaissance Technologies LLCBuy157,800746,300$22,673
Q3 2015Renaissance Technologies LLCBuy43,575588,500$15,807
Q3 2015Engaged CapitalBuy1,199737,465$19,808

Frequently asked questions about MED activity

  • Which institutional owners are buying MED?

    Institutional owners buying MED 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 MED activity?

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

  • Is institutional interest in MED increasing?

    Institutional interest in MED 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.