What does CUSIP 45841N107 represent in this 13F holders report?

CUSIP 45841N107 is the security identifier for IBKR - Interactive Brokers Group, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held IBKR - Interactive Brokers Group, Inc. - Common Stock in Q1 2019?

242 institutional investors reported IBKR - Interactive Brokers Group, Inc. - Common Stock for Q1 2019. Use the holders table for investor-level position and value details.

Interactive Brokers Group, Inc. - Common Stock (IBKR)

CUSIP: 45841N107

Q1 2019 13F Holders as of 31 Mar 2019

Security type / class: Equity / Common Stock
Total 13F shares: 66,130,797
Total 13F value: $3,431,405,385
Share change: +2,044,998
Put/Call ratio: 180%
SEC-reported price per share: $51.88
Number of holders: 242
Value change: +$103,930,107
Number of buys: 118
Number of sells: 106
Shares outstanding: 445,757,274

Security key

45841N107

Report period

Q1 2019

Institutions

242

Top holders

IBKR full security history Ownership snapshot Full 13F holder table Interactive Brokers Group, Inc. SEC filings Interactive Brokers Group, Inc. company facts

Broader feeds

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Ownership snapshot

Top reported holders of IBKR - Interactive Brokers Group, Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Bares Capital Management,...

Disclosed value leader

Bares Capital Management,...

Comparable rows

15/15

Latest evidence

31 Dec 2018

13F Lead comparable stake: 1.6% Showing 1-6 of 15 holder rows.

Quick read

Bares Capital Management, Inc. leads the comparable SEC ownership view at 1.6%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Bares Capital Management, Inc.'s linked filing trail.

Comparable ownership Top 5

Bares Capital Management, Inc. 1.6%

BAILLIE GIFFORD & CO 1.5%

BlackRock Finance, Inc. 1.5%

KAYNE ANDERSON RUDNICK INVESTMENT... 1.3%

VANGUARD GROUP INC 1.1%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Bares Capital Management, Inc.	13F Company 13F	1.6%	$378,696,000 6,929,471 shares	—	31 Dec 2018
BAILLIE GIFFORD & CO	13F Company 13F	1.5%	$370,654,000 6,814,747 shares	—	31 Dec 2018
BlackRock Finance, Inc.	13F Company 13F	1.5%	$355,620,000 6,507,223 shares	—	31 Dec 2018
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC	13F Company 13F	1.3%	$308,751,000 5,649,605 shares	—	31 Dec 2018
VANGUARD GROUP INC	13F Company 13F	1.1%	$259,236,000 4,743,561 shares	—	31 Dec 2018
CANTILLON CAPITAL MANAGEMENT LLC	13F Company 13F	0.59%	$144,217,000 2,638,920 shares	—	31 Dec 2018

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2019

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

242

66,130,797

Rows available

242

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2019 vs Q1 2019 Across Filers

Q1 2019 holders

242

Q1 2019 holders

242

Holder diff

Investor	Q1 2019 Shares	Q1 2019 Shares	Share Diff	Share Chg %	Q1 2019 value	Q1 2019 value	Value change	Value Chg %