EMERGENT BIOSOLUTIONS INC (EBS) Stock Institutional Trading Activity


EMERGENT BIOSOLUTIONS INC (EBS) 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 Ariel Appreciation 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
Q4 2025Renaissance Technologies LLCBuy58,900577,147$7,133,537
Q3 2025Renaissance Technologies LLCSell-171,400518,247$4,570,939
Q2 2025Renaissance Technologies LLCSell-70,600689,647$4,399,948
Q1 2025Renaissance Technologies LLCBuy94,400760,247$3,694,800
Q4 2024Renaissance Technologies LLCBuy140,900665,847$6,365,497
Q3 2024Renaissance Technologies LLCBuy351,200524,947$4,383,307
Q2 2024Renaissance Technologies LLCSell-717,553173,747$1,184,955
Q1 2024Renaissance Technologies LLCBuy344,000891,300$2,255
Q4 2023Renaissance Technologies LLCBuy243,300547,300$1,314
Q4 2022Renaissance Technologies LLCBuy248,900304,000$3,590
Q3 2022Renaissance Technologies LLCSell-39,90055,100$1,157
Q2 2022Renaissance Technologies LLCSell-263,00095,000$2,949
Q1 2022Renaissance Technologies LLCBuy295,900358,000$14,699
Q4 2020Renaissance Technologies LLCBuy17,99662,100$5,564
Q3 2020Renaissance Technologies LLCSell-340,52044,104$4,557
Q2 2020Renaissance Technologies LLCSell-238,377384,624$30,416
Q1 2020Renaissance Technologies LLCSell-141,100623,001$36,047
Q4 2019Renaissance Technologies LLCSell-220,210764,101$41,223
Q3 2019Renaissance Technologies LLCSell-366,200984,311$51,460
Q2 2019Renaissance Technologies LLCSell-627,8911,350,511$65,243
Q1 2019Renaissance Technologies LLCBuy382,3911,978,402$99,949
Q4 2018Renaissance Technologies LLCSell-275,3001,596,011$94,612
Q3 2018Renaissance Technologies LLCBuy3,4001,871,311$123,188
Q1 2018Renaissance Technologies LLCBuy283,0001,867,911$98,346
Q4 2017Renaissance Technologies LLCBuy432,3001,584,911$73,651
Q3 2017Renaissance Technologies LLCBuy332,2001,152,611$46,623
Q2 2017Renaissance Technologies LLCBuy117,700820,411$27,820
Q1 2017Renaissance Technologies LLCSell-180,800702,711$20,407
Q4 2016Renaissance Technologies LLCSell-294,600883,511$29,015
Q3 2016Renaissance Technologies LLCSell-96,1001,178,111$37,146

Frequently asked questions about EBS activity

  • Which institutional owners are buying EBS?

    Institutional owners buying EBS 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 EBS activity?

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

  • Is institutional interest in EBS increasing?

    Institutional interest in EBS 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.