Interactive Brokers Group Ownership | Who Owns Interactive Brokers Group?

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Interactive Brokers Group Ownership Summary

Interactive Brokers Group is owned by 85.96% institutional investors, 2.83% insiders, and 11.22% retail investors. Vanguard group is the largest institutional shareholder, holding 9.32% 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	85.96%	2.83%	11.22%
Sector	Financial Services Stocks	51.64%	15.54%	32.82%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	10.07M	9.32%	$1.78B
Blackrock funding, inc. /de	40.24M	9.18%	$2.23B
Blackrock	9.30M	8.69%	$1.14B
Jpmorgan chase	3.99M	3.69%	$704.63M
State street	3.17M	2.96%	$388.55M
Cantillon capital management	12.80M	2.92%	$709.45M
Kayne anderson rudnick investment management	12.49M	2.85%	$692.08M
Greenwich wealth management	10.86M	2.48%	$602.00M
Orbis allan gray	9.74M	2.22%	$539.70M
Geode capital management	2.26M	2.09%	$399.20M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Hengistbury investment partners llp	1.14M	42.99%	$62.95M
Ancient art	1.64M	29.41%	$91.07M
Greenwich wealth management	10.86M	29.22%	$602.00M
Oakcliff capital partners, lp	1.03M	28.54%	$57.11M
Brooktree capital management	133.03K	17.43%	$23.50M
Lansing management lp	106.56K	16.58%	$18.83M
Bares capital management	3.01M	16.20%	$166.85M
Bronte capital management pty	2.40M	11.79%	$150.08M
Alden global capital	260.64K	8.89%	$14.44M
Rv capital	849.92K	8.72%	$47.09M

Top Buyers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	40.24M	0.04%	29.82M
Cantillon capital management	12.80M	4.10%	9.51M
Kayne anderson rudnick investment management	12.49M	1.65%	9.32M
Greenwich wealth management	10.86M	29.22%	8.16M
Orbis allan gray	9.74M	2.62%	6.25M

Top Sellers

Holder	Shares	% Assets	Change
Egerton capital (uk) llp	1.85M	3.78%	-1.53M
Voya investment management	257.43K	0.05%	-825.13K
Junto capital management lp	-	-	-477.04K
Morgan stanley	1.42M	0.01%	-412.19K
Abrams bison investments	-	-	-408.00K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	1.30M	0.03%	1.30M	$229.32M
Peak6	738.98K	0.08%	738.98K	$40.95M
London & capital asset management	448.73K	1.89%	448.73K	$24.86M
Nearwater capital markets	440.00K	0.39%	440.00K	$24.38M
Rovida advisors	340.00K	2.97%	340.00K	$18.83M

Sold Out

Holder	Change
Northwest financial advisors	-2.00
Claris advisors, llc / mo /	-2.00
Castleview partners	-3.00
Migdal insurance & financial	-4.00
Global financial private client	-4.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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	-
Jun 30, 2024	565	9.28%	93,247,817	0.68%	87	1.16%	293	12.69%	182	7.69%

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
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%	-
American Century Ultra® Inv	3.74M	0.86%	-
Invesco S&P MidCap Momentum ETF	3.73M	0.85%	8.16K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Sep 25, 2025	Brody Paul Jonathan	Chief Financial Officer	Sell	$276.93K
Sep 26, 2025	Brody Paul Jonathan	Chief Financial Officer	Sell	$1.02M
Sep 25, 2025	Brody Paul Jonathan	Chief Financial Officer	Sell	$75.42K
Sep 25, 2025	Brody Paul Jonathan	Chief Financial Officer	Sell	$574.16K
Sep 26, 2025	Brody Paul Jonathan	Chief Financial Officer	Sell	$104.58K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	53
2025 Q2	-	-
2025 Q1	1	-
2024 Q4	-	-
2024 Q3	-	-

IBKR Ownership FAQ

Who owns the most shares of Interactive Brokers Group?

Interactive Brokers Group’s largest shareholders are Vanguard group (10.07M shares, 9.32%), Blackrock funding, inc. /de (40.24M shares, 9.18%), and Blackrock (9.3M shares, 8.69%). Together, they hold 27.18% 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 42.99% of its assets in 1.14M Interactive Brokers Group shares, valued at 62.95M$.

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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