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Interactive Brokers Group Ownership | Who Owns Interactive Brokers Group?

OverviewForecastRevenueFinancialsChartTranscripts

Interactive Brokers Group Ownership Summary

Interactive Brokers Group is owned by 57.25% institutional investors, 2.87% insiders, and 39.87% retail investors. Vanguard group is the largest institutional shareholder, holding 11.73% of IBKR shares. iShares Core S&P Mid-Cap ETF is the top mutual fund, with 3.22% of its assets in Interactive Brokers Group shares.

IBKR Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockInteractive Brokers Group57.25%2.87%39.87%
SectorFinancial Services Stocks 32.03%15.42%52.55%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Vanguard group52.25M11.73%$3.36B
Blackrock9.30M8.69%$1.14B
Blackrock funding, inc. /de31.68M7.11%$2.04B
State street18.65M4.25%$1.28B
Cantillon capital management12.76M2.87%$820.59M
Kayne anderson rudnick investment management12.17M2.78%$837.73M
Wellington management group llp10.90M2.49%$750.11M
Geode capital management10.20M2.29%$654.26M
Orbis allan gray9.54M2.18%$656.71M
Greenwich wealth management9.19M2.06%$590.69M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Hengistbury investment partners llp1.14M32.80%$73.06M
Oakcliff capital partners, lp1.03M30.61%$70.93M
Ancient art1.64M27.18%$113.10M
Greenwich wealth management9.19M26.35%$590.69M
Systrade500.00K19.62%$32.16M
Brooktree capital management400.73K17.14%$25.77M
Lansing management lp337.99K16.87%$23.26M
Bares capital management2.06M13.08%$141.79M
Rv capital752.48K11.27%$48.39M
Bronte capital management pty1.49M9.53%$95.58M

Top Buyers

HolderShares% AssetsChange
Norges bank7.05M0.05%7.05M
State street18.65M0.04%3.52M
Wellington management group llp10.90M0.13%1.63M
Bessemer group1.53M0.15%1.52M
Worldquant millennium advisors1.37M0.41%1.37M

Top Sellers

HolderShares% AssetsChange
Agf management---2.06M
Marshall wace, llp3.48M0.24%-1.93M
Jpmorgan chase7.44M0.03%-1.61M
Qube research---1.52M
Citigroup992.68K0.03%-1.44M

New Positions

HolderShares% AssetsChangeValue
Norges bank7.05M0.05%7.05M$453.15M
Bristol gate capital partners1.21M4.50%1.21M$77.93M
Adage capital partners gp405.30K0.04%405.30K$27.89M
Ofi invest asset management347.63K0.27%347.63K$19.04M
Blue whale capital llp315.58K1.20%315.58K$21.72M

Sold Out

HolderChange
Northwest financial advisors-2.00
Blume capital management-2.00
Claris advisors, llc / mo /-2.00
Castleview partners-3.00
Migdal insurance & financial-4.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Dec 31, 2025716-24.95%254,998,782-32.75%570.77%337-33.79%251-16.33%
Sep 30, 2025704-14.77%261,205,947-29.31%590.84%374-51.43%2271094.74%
Jun 30, 20258316.40%376,882,120302.56%851.16%77291.56%18-92.94%
Mar 31, 20257674.35%93,565,4900.04%851.16%393-1.50%2548.09%
Dec 31, 2024426-29.47%56,720,993-37.97%520.74%229-28.88%143-23.12%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
iShares Core S&P Mid-Cap ETF14.20M3.22%-25.52K
Vanguard US Total Market Shares ETF3.27M3.00%53.98K
Vanguard Total Stock Mkt Idx Inv13.01M2.95%-312.37K
Vanguard Mid Cap Index Institutional9.24M2.09%99.63K
SPDR® S&P 500® ETF5.26M1.18%64.77K
iShares Core S&P 500 ETF5.24M1.18%-
Vanguard Institutional Extnd Mkt Idx Tr4.68M1.06%-2.03M
Orbis Global Equity Investor1.03M0.94%-413.42K
AustralianSuper Balanced Sup958.53K0.88%-46.12K
American Century US Premier Lg Cp Gr3.74M0.86%-

Recent Insider Transactions

DateNameRoleActivityValue
Jan 27, 2026Nemser Earl H Vice ChairmanSell$2.98M
Jan 26, 2026Nemser Earl H Vice ChairmanSell$4.62M
Jan 26, 2026Nemser Earl H Vice ChairmanSell$2.36M
Jan 26, 2026Nemser Earl H Vice ChairmanSell$241.82K
Jan 27, 2026Nemser Earl H Vice ChairmanSell$1.55M

Insider Transactions Trends

DateBuySell
2026 Q1-8
2025 Q415
2025 Q3-64
2025 Q2--
2025 Q11-

IBKR Ownership FAQ

Who owns the most shares of Interactive Brokers Group?

Interactive Brokers Group’s largest shareholders are Vanguard group (52.25M shares, 11.73%), Blackrock (9.3M shares, 8.69%), and Blackrock funding, inc. /de (31.68M shares, 7.11%). Together, they hold 27.53% of Interactive Brokers Group’s total shares outstanding.

Does Blackrock own Interactive Brokers Group?

Yes, BlackRock owns 8.69% of Interactive Brokers Group, totaling 9.3M shares as of Jun 2024. This represents 0.03% of BlackRock's total assets, with a market value of 1.14B$. In the last quarter, BlackRock increased its holdings by 210.61K shares, a 2.32% change.

Who is Interactive Brokers Group’s biggest shareholder by percentage of total assets invested?

Hengistbury investment partners llp is Interactive Brokers Group’s biggest shareholder by percentage of total assets invested, with 32.80% of its assets in 1.14M Interactive Brokers Group shares, valued at 73.06M$.

Who is the top mutual fund holder of Interactive Brokers Group shares?

iShares Core S&P Mid-Cap ETF is the top mutual fund holder of Interactive Brokers Group shares, with 3.22% of its total shares outstanding invested in 14.2M Interactive Brokers Group shares.

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