Interactive Brokers Group Ownership | Who Owns Interactive Brokers Group?

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Interactive Brokers Group Ownership Summary

Interactive Brokers Group is owned by 59.57% institutional investors, 2.82% insiders, and 37.61% retail investors. Vanguard group is the largest institutional shareholder, holding 12.06% 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

Type	Name	% Inst	% Insiders	% Retail
Stock	Interactive Brokers Group	59.57%	2.82%	37.61%
Sector	Financial Services Stocks	36.95%	15.48%	47.58%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	52.86M	12.06%	$3.64B
Blackrock	9.30M	8.69%	$1.14B
Blackrock funding, inc. /de	30.97M	7.06%	$2.13B
State street	18.65M	4.25%	$1.28B
Cantillon capital management	12.66M	2.89%	$871.41M
Kayne anderson rudnick investment management	12.17M	2.78%	$837.73M
Wellington management group llp	10.90M	2.49%	$750.11M
Greenwich wealth management	10.37M	2.36%	$713.37M
Geode capital management	10.34M	2.36%	$712.11M
Orbis allan gray	9.54M	2.18%	$656.71M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Hengistbury investment partners llp	1.14M	49.49%	$78.17M
Greenwich wealth management	10.37M	35.59%	$713.37M
Oakcliff capital partners, lp	1.03M	30.61%	$70.93M
Ancient art	1.64M	27.18%	$113.10M
Systrade	500.00K	25.41%	$34.41M
Brooktree capital management	416.87K	18.23%	$28.68M
Lansing management lp	337.99K	16.87%	$23.26M
Bares capital management	2.06M	13.08%	$141.79M
Bronte capital management pty	1.76M	12.13%	$135.43M
Rv capital	799.27K	10.07%	$55.00M

Top Buyers

Holder	Shares	% Assets	Change
Vanguard group	52.86M	0.05%	11.05M
Geode capital management	10.34M	0.05%	3.66M
State street	18.65M	0.04%	3.52M
Td asset management	2.30M	0.13%	2.20M
Wellington management group llp	10.90M	0.13%	1.63M

Top Sellers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	30.97M	0.04%	-9.27M
Agf management	-	-	-2.06M
Marshall wace, llp	3.48M	0.24%	-1.93M
Egerton capital (uk) llp	6.25M	4.54%	-1.80M
Qube research	-	-	-1.52M

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	1.30M	0.03%	1.30M	$229.32M
Systrade	500.00K	25.41%	500.00K	$34.41M
Adage capital partners gp	405.30K	0.04%	405.30K	$27.89M
Blue whale capital llp	315.58K	1.20%	315.58K	$21.72M
Chevy chase trust	227.51K	0.04%	227.51K	$15.66M

Sold Out

Holder	Change
Northwest financial advisors	-2.00
Blume capital management	-2.00
Claris advisors, llc / mo /	-2.00
Castleview partners	-3.00
Global financial private client	-4.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	704	-14.77%	261,205,947	-29.31%	59	0.84%	374	-51.43%	227	1094.74%
Jun 30, 2025	831	6.40%	376,882,120	302.56%	85	1.16%	772	91.56%	18	-92.94%
Mar 31, 2025	767	4.35%	93,565,490	0.04%	85	1.16%	393	-1.50%	254	8.09%
Dec 31, 2024	426	-29.47%	56,720,993	-37.97%	52	0.74%	229	-28.88%	143	-23.12%
Sep 30, 2024	598	5.10%	91,164,480	-2.28%	83	1.12%	319	7.77%	184	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Mid-Cap ETF	14.20M	3.22%	-25.52K
Vanguard US Total Market Shares ETF	3.27M	3.00%	53.98K
Vanguard Total Stock Mkt Idx Inv	13.01M	2.95%	-312.37K
Vanguard Mid Cap Index Institutional	9.24M	2.09%	99.63K
SPDR® S&P 500® ETF	5.26M	1.18%	64.77K
iShares Core S&P 500 ETF	5.24M	1.18%	-
Vanguard Institutional Extnd Mkt Idx Tr	4.68M	1.06%	-2.03M
Orbis Global Equity Investor	1.03M	0.94%	-413.42K
AustralianSuper Balanced Sup	958.53K	0.88%	-46.12K
American Century US Premier Lg Cp Gr	3.74M	0.86%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Oct 29, 2025	Harris Lawrence E	-	Sell	$734.50K
Oct 27, 2025	Harris Lawrence E	-	Sell	$522.98K
Oct 28, 2025	Harris Lawrence E	-	Sell	$474.02K
Oct 23, 2025	Bright Jill	-	Buy	$26.38K
Oct 23, 2025	Harris Lawrence E	-	Sell	$1.49M

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	1	5
2025 Q3	-	64
2025 Q2	-	-
2025 Q1	1	-
2024 Q4	-	-

IBKR Ownership FAQ

Who owns the most shares of Interactive Brokers Group?

Interactive Brokers Group’s largest shareholders are Vanguard group (52.86M shares, 12.06%), Blackrock (9.3M shares, 8.69%), and Blackrock funding, inc. /de (30.97M shares, 7.06%). Together, they hold 27.81% 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 49.49% of its assets in 1.14M Interactive Brokers Group shares, valued at 78.17M$.

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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