INTERACTIVE BROKERS GRO-CL A (IBKR) Institutional Ownership Changes & 13F Activity

INTERACTIVE BROKERS GRO-CL A (IBKR). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Cantillon Capital Management, Viking Global Investors, Egerton Capital UK, Ancient Art (Teton Capital), and Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2022Oakcliff Capital PartnersBuy38,000299,847$19,763
Q4 2021Ancient Art (Teton Capital)Sell-599,5931,136,000$90,221
Q4 2021Cantillon Capital ManagementSell-163,3262,162,492$171,745
Q4 2021Renaissance Technologies LLCSell-49,700478,600$38,010
Q4 2021Thunderbird PartnersBuy12,988925,664$73,516
Q4 2021Bares Capital ManagementSell-1,8835,187,311$411,976
Q3 2021Renaissance Technologies LLCSell-557,358528,300$32,934
Q3 2021Bares Capital ManagementBuy91,3955,189,194$323,494
Q3 2021Cantillon Capital ManagementSell-33,2482,325,818$144,992
Q3 2021Thunderbird PartnersBuy23,408912,676$56,896
Q2 2021Renaissance Technologies LLCBuy449,4581,085,658$71,360
Q2 2021Bares Capital ManagementSell-342,1565,097,799$335,078
Q2 2021Thunderbird PartnersSell-262,489889,268$58,452
Q2 2021Ancient Art (Teton Capital)Sell-52,3801,735,593$114,081
Q2 2021Cantillon Capital ManagementSell-38,2122,359,066$155,062
Q1 2021Thunderbird PartnersSell-380,5771,151,757$84,124
Q1 2021Oakcliff Capital PartnersSell-105,500261,847$19,125
Q1 2021Ancient Art (Teton Capital)Sell-101,9421,787,973$130,594
Q1 2021Renaissance Technologies LLCBuy88,800636,200$46,468
Q1 2021Cantillon Capital ManagementSell-81,1432,397,278$175,097
Q1 2021Bares Capital ManagementSell-56,6005,439,955$397,334
Q1 2021ARK InvestSell-1,1113,002$219
Q4 2020ARK InvestSell-162,7444,113$251
Q4 2020Renaissance Technologies LLCBuy118,400547,400$33,348
Q4 2020Oakcliff Capital PartnersSell-20,939367,347$22,379
Q4 2020Bares Capital ManagementSell-16,0655,496,555$334,850
Q4 2020Cantillon Capital ManagementSell-10,0262,478,421$150,985
Q4 2020Thunderbird PartnersBuy6001,532,334$93,350
Q3 2020Thunderbird PartnersBuy1,531,7341,531,734$74,029
Q3 2020Bares Capital ManagementSell-198,6835,512,620$266,425

Frequently asked questions about IBKR activity

  • Which institutional owners are buying IBKR?

    Institutional owners buying IBKR 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 IBKR activity?

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

  • Is institutional interest in IBKR increasing?

    Institutional interest in IBKR 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.

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