Interactive Brokers Group Ownership | Who Owns Interactive Brokers Group?

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Interactive Brokers Group Ownership Summary

Interactive Brokers Group is owned by 28.21% institutional investors, 2.80% insiders, and 69.00% 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

Type	Name	% Inst	% Insiders	% Retail
Stock	Interactive Brokers Group	28.21%	2.80%	69.00%
Sector	Financial Services Stocks	37.04%	15.58%	47.38%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	52.25M	11.73%	$3.36B
Blackrock	9.30M	8.69%	$1.14B
Blackrock funding, inc. /de	31.38M	7.04%	$2.10B
State street	19.09M	4.29%	$1.28B
Fmr	12.50M	2.81%	$838.46M
Cantillon capital management	11.25M	2.52%	$754.26M
Geode capital management	10.44M	2.34%	$699.50M
Kayne anderson rudnick investment management	10.02M	2.25%	$671.79M
Greenwich wealth management	9.92M	2.23%	$665.61M
Wellington management group llp	9.77M	2.19%	$655.60M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Oakcliff capital partners, lp	1.03M	30.50%	$69.13M
Hengistbury investment partners llp	1.05M	29.35%	$70.48M
Greenwich wealth management	9.92M	27.17%	$665.61M
Systrade	500.00K	22.50%	$33.53M
Ancient art	1.29M	18.80%	$86.20M
Brooktree capital management	272.25K	14.48%	$18.26M
Rv capital	757.92K	13.36%	$51.11M
Bares capital management	2.06M	13.08%	$141.79M
Lansing management lp	290.19K	12.93%	$19.46M
Crocodile capital partners gmbh	227.23K	8.62%	$12.04M

Top Buyers

Holder	Shares	% Assets	Change
Fmr	12.50M	0.04%	7.69M
Norges bank	7.05M	0.05%	7.05M
Two sigma investments, lp	8.31M	0.45%	4.79M
Capital world investors	3.03M	0.03%	3.03M
Vanguard fiduciary trust	2.49M	0.04%	2.49M

Top Sellers

Holder	Shares	% Assets	Change
Orbis allan gray	6.12M	1.73%	-3.16M
Marshall wace, llp	877.77K	0.06%	-2.33M
Agf management	-	-	-2.06M
Cantillon capital management	11.25M	5.01%	-1.51M
Trivest advisors	-	-	-1.32M

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	7.05M	0.05%	7.05M	$453.15M
Capital world investors	3.03M	0.03%	3.03M	$203.28M
Vanguard fiduciary trust	2.49M	0.04%	2.49M	$166.97M
Viking global investors lp	1.39M	0.26%	1.39M	$93.52M
Vanguard global advisers	978.50K	0.04%	978.50K	$65.63M

Sold Out

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

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	616	-39.19%	125,621,455	-67.26%	28	0.38%	340	-30.89%	178	-48.70%
Dec 31, 2025	716	-24.95%	254,998,782	-32.75%	57	0.77%	337	-33.79%	251	-16.33%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Mid-Cap ETF	14.20M	3.22%	-25.52K
Vanguard Total Stock Mkt Idx Inv	13.42M	3.01%	47.20K
Vanguard US Total Market Shares ETF	3.27M	3.00%	53.98K
Vanguard 500 Index Investor	11.34M	2.55%	-113.15K
iShares Core S&P 500 ETF	5.76M	1.29%	16.90K
Fidelity Magellan	5.69M	1.28%	355.30K
Fidelity 500 Index	5.69M	1.28%	19.82K
State Street® SPDR® S&P 500® ETF	5.31M	1.19%	-5.70K
SPDR® S&P 500® ETF	5.26M	1.18%	64.77K
Vanguard Institutional Extnd Mkt Idx Tr	4.68M	1.06%	-2.03M

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 01, 2026	Conkling Lori A	-	Buy	$1.99K
Apr 28, 2026	Harris Lawrence E	-	Sell	$2.00M
Apr 01, 2026	Conkling Lori A	-	Buy	$1.71K
Feb 25, 2026	Conkling Lori A	-	Buy	$3.66K
Mar 02, 2026	Conkling Lori A	-	Buy	$1.73K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	1	1
2026 Q1	2	8
2025 Q4	1	5
2025 Q3	-	64
2025 Q2	-	-

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 (31.38M shares, 7.04%). Together, they hold 27.46% 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?

Oakcliff capital partners, lp is Interactive Brokers Group’s biggest shareholder by percentage of total assets invested, with 30.50% of its assets in 1.03M Interactive Brokers Group shares, valued at 69.13M$.

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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