$IBKR

$80.75 +$0.47 (0.59%) Pre-market

$IBKR Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 447.9M shares outstanding

Who owns IBKR?

By type of holder

Institutions 86.4% Insiders 0.0% Everyone else 13.6%

Concentration Top 10 holders own 32.5%

BlackRock, Inc. 7.4% · Vanguard Capital Management LLC 6.3%

Institutional ownership

86.4%

+1.8 pts vs last qtr

Institutional holders

1,112

+114 vs last qtr

Net shares bought

+7.9M

by institutions in Q2 2026

New / sold out

197 / 83

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Norges Bank NEW +6.3M
Ninety One UK Ltd NEW +5.3M

Biggest sellers in Q2 2026

Cantillon Capital Management LLC −10.7M
Vanguard Portfolio Management LLC −6.3M

Who is planning to sell?

Notices of proposed sale, last 12 months

$32.3M

2 notices from 2 people

Shares covered

426.0K

0.10% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Nemser Earl H Officer $30.3M
Harris Lawrence E Director $2.02M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+64.9%

+5.71% a year

Each share's claim on the business

−39.4%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $789M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years61% 3–5 years13% 1–3 years14% Under 1 year12%

Quarterly turnover

12.2%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting IBKR on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	33.1M	7.40%	+1.8M (+5.6%)	≤2021	0.0%
Shares held by quarter Peak holding40.2M (Q2'25) Change over 8 quarters+23.6M Share of the company7.400% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	28.3M	6.33%	+169.6K (+0.6%)	≤2021	0.1%
Shares held by quarter Peak holding28.3M (Q2'26) Change over 8 quarters+28.3M Share of the company6.330% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

33.1M

% of company

7.40%

Change vs last qtr

+1.8M (+5.6%)

Held since

≤2021

Vanguard Capital Management LLC

28.3M

% of company

6.33%

Change vs last qtr

+169.6K (+0.6%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Interactive Brokers Group Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting IBKR on Form N-PORT; together they hold 28.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$1.17B	13.4M	3.00%	0.05%	June 30, 2026
V5 Vanguard 500 Index Fund Vanguard Index Funds	$1B	11.5M	2.58%	0.06%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$1.17B

% of company

3.00%

% of the fund

0.05%

As of

June 30, 2026

Vanguard 500 Index Fund

Vanguard Index Funds

Position value

$1B

% of company

2.58%

% of the fund

0.06%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Interactive Brokers Group Inc and how much of the fund the position is.

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