CELLDEX THERAPEUTICS INC (CLDX) Stock Institutional Trading Activity


CELLDEX THERAPEUTICS INC (CLDX) 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 and Viking Global Investors. 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 LLCSell-76,100118,488$3,218,134
Q3 2025Renaissance Technologies LLCBuy13,200194,588$5,033,992
Q2 2025Renaissance Technologies LLCBuy34,800181,388$3,691,246
Q1 2025Renaissance Technologies LLCBuy10,000146,588$2,660,572
Q4 2024Renaissance Technologies LLCBuy93,800136,588$3,451,579
Q2 2024Renaissance Technologies LLCSell-269,68242,788$1,583,584
Q1 2024Renaissance Technologies LLCBuy286,582312,470$13,114
Q3 2022Renaissance Technologies LLCSell-135,38825,888$728
Q2 2022Viking Global InvestorsBuy491,2072,337,854$63,029
Q1 2022Viking Global InvestorsBuy1,088,7661,846,647$62,897
Q4 2021Viking Global InvestorsSell-4,415757,881$29,285
Q3 2021Renaissance Technologies LLCSell-202,751161,276$8,707
Q3 2021Viking Global InvestorsBuy762,296762,296$41,156
Q2 2021Renaissance Technologies LLCSell-177,400364,027$12,173
Q1 2021Renaissance Technologies LLCSell-507,400541,427$11,153
Q4 2020Renaissance Technologies LLCSell-687,8481,048,827$18,375
Q3 2020Renaissance Technologies LLCBuy99,5001,736,675$25,755
Q2 2020Renaissance Technologies LLCBuy466,9881,637,175$21,283
Q1 2020Renaissance Technologies LLCBuy54,8191,170,187$1,943
Q4 2019Renaissance Technologies LLCBuy89,0831,115,368$2,487
Q3 2019Renaissance Technologies LLCBuy114,0001,026,285$2,186
Q2 2019Renaissance Technologies LLCBuy367,179912,285$2,445
Q1 2019Renaissance Technologies LLCBuy545,106545,106$2,682

Frequently asked questions about CLDX activity

  • Which institutional owners are buying CLDX?

    Institutional owners buying CLDX 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 CLDX activity?

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

  • Is institutional interest in CLDX increasing?

    Institutional interest in CLDX 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.