What is CUSIP 45841N107?

CUSIP 45841N107 is the security identifier used in SEC filing datasets for IBKR - Interactive Brokers Group, Inc. - Common Stock.

Who owns IBKR - Interactive Brokers Group, Inc. - Common Stock based on 13F filings?

987 institutions reported positions in IBKR - Interactive Brokers Group, Inc. - Common Stock as of Q1 2026. Open the latest holders period and ownership history tables on this page for position-level details.

Security Snapshot

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

CUSIP: 45841N107

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

987

Shares (Excl. Options)

378,728,950

Price

$67.07

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Type / Class: Equity / Common Stock
Symbol: IBKR on Nasdaq
Shares outstanding: 445,757,274
Price per share: $77.49
All holders as of 31 Mar 2026: Q1 2026
Total 13F shares: 378,728,950
Total reported value: $25,370,092,458
% of total 13F portfolios: 0.04%
Share change: -148,554
Value change: +$40,000,575
Number of holders: 987
Price from insider filings: $77.49

Reported Shares, Excluding Options vs Price

Reported Value, Excluding Options

Total Investors

Key facts

IBKR - Interactive Brokers Group, Inc. - Common Stock is tracked under CUSIP 45841N107.
987 institutions reported positions in Q1 2026.
3 significant owners is listed from Schedule 13D/13G reporting.

Change

Holder count moved from 973 to 987 between Q4 2025 and Q1 2026.
Reported value moved from $24,709,048,513 to $25,370,092,458.

Research use

You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 987 institutions filings for Q1 2026.

Open SEC Evidence

Security key

45841N107

Latest holder period

Q1 2026

13F holders

987

13D/G owners

CIK / CUSIP context first

Open Q1 2026 holders IBKR full holder history Interactive Brokers Group, Inc. SEC filings Interactive Brokers Group, Inc. company facts Interactive Brokers Group, Inc. insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Recent Quarterly Holder Reports

Open recent reporting periods for CUSIP 45841N107:

Q1 2026 (987 holders) Q4 2025 (973 holders) Q3 2025 (902 holders) Q2 2025 (794 holders) Q1 2025 (738 holders) Q4 2024 (703 holders) Q3 2024 (577 holders) Q2 2024 (544 holders) Q1 2024 (486 holders) Q4 2023 (445 holders)

Significant Owners of Interactive Brokers Group, Inc. - Common Stock (IBKR) based on Schedule 13D/G filings

Filer	Ownership	Change %	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
VANGUARD CAPITAL MANAGEMENT LLC	7.3%		$2,182,476,647		32,540,281		Vanguard Capital Management	31 Mar 2026
BlackRock, Inc.	6.2%	-33%	$1,900,506,052	+$1,189,436,586	27,619,620	+167%	BlackRock, Inc.	30 Sep 2025
ORBIS INVESTMENT MANAGEMENT LTD	4.8%		$906,513,980		5,277,180		ORBIS INVESTMENT MANAGEMENT LTD	31 Dec 2024

As of 31 Mar 2026, 987 institutional investors reported holding 378,728,950 shares of Interactive Brokers Group, Inc. - Common Stock (IBKR). This represents 85% of the company’s total 445,757,274 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Interactive Brokers Group, Inc. - Common Stock (IBKR) together control 54% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution	Ownership %	Shares Held	Share Change %	Portfolio %	Holdings Value
BlackRock, Inc.	7%	31,375,037	-0.96%	0.04%	$2,104,323,725
VANGUARD CAPITAL MANAGEMENT LLC	6.3%	28,180,361	0%	0.05%	$1,890,056,812
STATE STREET CORP	4.3%	19,092,105	+1.4%	0.04%	$1,280,507,482
VANGUARD PORTFOLIO MANAGEMENT LLC	3.4%	14,984,545	0%	0.05%	$1,005,013,433
FMR LLC	2.8%	12,501,284	+160%	0.04%	$838,461,148
Cantillon Capital Management LLC	2.5%	11,245,881	-12%	5%	$754,261,239
GEODE CAPITAL MANAGEMENT, LLC	2.3%	10,443,607	+2.4%	0.04%	$699,500,890
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC	2.2%	10,016,215	-11%	2%	$671,787,557
Greenwich Wealth Management LLC	2.2%	9,924,043	+8%	27%	$665,606,000
WELLINGTON MANAGEMENT GROUP LLP	2.2%	9,774,792	+18%	0.12%	$655,595,299
Invesco Ltd.	2.2%	9,647,168	+16%	0.1%	$647,035,557
TWO SIGMA INVESTMENTS, LP	1.9%	8,312,971	+136%	0.46%	$557,550,965
JPMORGAN CHASE & CO	1.5%	6,723,652	-9.6%	0.03%	$428,229,460
Egerton Capital (UK) LLP	1.4%	6,275,179	-9.6%	4.7%	$420,876,256
BANK OF AMERICA CORP /DE/	1.4%	6,230,136	-6.6%	0.03%	$417,855,207
Orbis Allan Gray Ltd	1.4%	6,118,045	-34%	1.7%	$410,337,278
London & Capital Asset Management Ltd	1.3%	5,915,803	+0.93%	4.3%	$396,654,591
AMERICAN CENTURY COMPANIES INC	1.3%	5,744,408	-0.32%	0.2%	$385,277,445
MORGAN STANLEY	1.1%	4,765,572	+5.4%	0.02%	$319,627,063
1832 Asset Management L.P.	1%	4,454,154	-11%	0.4%	$298,740,109
BAMCO INC /NY/	0.91%	4,047,376	-13%	0.82%	$271,457,508
JACOBS LEVY EQUITY MANAGEMENT, INC	0.88%	3,931,016	-18%	1.1%	$263,653,243
BESSEMER GROUP INC	0.88%	3,922,736	+156%	0.41%	$263,097,000
NEUBERGER BERMAN GROUP LLC	0.84%	3,733,048	-19%	0.19%	$249,399,087
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.81%	3,592,551	+6.2%	0.04%	$240,952,396

Institutional Holders of Interactive Brokers Group, Inc. - Common Stock (IBKR) across Reporting Periods

Period	Reported Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Calls Notional Value	Price (Median)	Investors
2026 Q1	378,728,950	$25,370,092,458	+$40,000,575	$223,451,948	$305,171,452	$67.07	987
2025 Q4	384,071,771	$24,709,048,513	+$562,911,664	$412,432,892	$364,721,302	$64.31	973
2025 Q3	379,034,057	$26,091,480,510	+$230,005,424	$459,744,886	$459,647,274	$68.81	902
2025 Q2	377,684,641	$20,946,619,126	+$15,591,092,833	$404,313,374	$403,231,711	$55.41	794
2025 Q1	93,617,495	$15,520,224,147	-$25,218,054	$259,707,361	$308,669,649	$165.59	738
2024 Q4	93,531,681	$16,547,877,926	+$51,161,734	$212,958,018	$251,578,080	$176.67	703
2024 Q3	92,662,885	$12,915,082,297	-$105,326,680	$104,380,259	$94,207,683	$139.36	577
2024 Q2	93,419,979	$11,453,344,808	-$124,896,568	$78,414,960	$152,416,560	$122.60	544
2024 Q1	94,505,276	$10,557,400,296	+$233,974,346	$74,711,648	$105,945,764	$111.71	486
2023 Q4	92,971,729	$7,708,462,713	-$85,350,851	$61,528,380	$58,477,660	$82.90	445
2023 Q3	93,347,920	$8,078,864,966	+$104,543,173	$32,693,902	$54,030,752	$86.56	430
2023 Q2	91,602,443	$7,609,573,083	+$29,089,179	$33,704,632	$32,192,810	$83.07	416
2023 Q1	91,795,973	$7,578,323,531	-$73,056	$61,383,136	$57,484,352	$82.56	423
2022 Q4	92,161,057	$6,668,351,292	-$14,015,726	$53,256,720	$42,968,635	$72.35	394
2022 Q3	92,188,547	$5,892,477,086	+$362,489,312	$21,954,000	$24,670,000	$63.91	326
2022 Q2	86,696,712	$4,769,719,885	+$4,377,425	$11,234,000	$17,361,000	$55.01	328
2022 Q1	86,792,908	$5,719,116,795	+$60,983,603	$16,484,000	$28,256,000	$65.91	326
2021 Q4	85,439,673	$6,786,530,725	+$405,690,349	$41,825,000	$55,993,344	$79.42	329
2021 Q3	81,939,700	$5,112,239,576	+$116,084,815	$50,815,856	$47,631,468	$62.34	294
2021 Q2	80,195,225	$5,271,383,793	+$27,616,577	$94,831,502	$36,265,298	$65.73	308
2021 Q1	79,054,993	$5,773,420,090	+$147,608,040	$97,861,648	$38,644,832	$73.04	311
2020 Q4	77,353,409	$4,712,081,345	+$606,325,478	$35,691,000	$36,371,000	$60.92	271
2020 Q3	67,637,007	$3,265,410,791	-$70,142,982	$35,683,000	$21,707,000	$48.33	255
2020 Q2	69,353,504	$2,898,850,640	+$30,457,243	$31,534,471	$9,262,373	$41.77	237
2020 Q1	69,442,047	$2,995,722,845	+$16,641,420	$16,665,000	$7,298,000	$43.17	218
2019 Q4	69,419,811	$3,235,650,518	+$29,363,159	$26,933,000	$19,099,000	$46.62	239
2019 Q3	67,525,798	$3,627,801,856	+$35,953,567	$24,799,000	$17,359,000	$53.78	237
2019 Q2	66,776,002	$3,621,107,789	+$108,557,023	$22,843,000	$13,474,000	$54.20	237
2019 Q1	66,130,797	$3,431,405,385	+$103,930,107	$33,016,000	$18,346,000	$51.88	242
2018 Q4	64,143,746	$3,501,250,668	+$53,892,424	$28,464,000	$19,876,000	$54.65	239
2018 Q3	63,173,539	$3,494,437,670	+$69,098,552	$33,297,000	$32,445,000	$55.31	264
2018 Q2	61,479,733	$3,959,968,149	-$77,907,335	$43,207,000	$20,984,000	$64.41	285
2018 Q1	62,396,070	$4,195,920,155	-$79,636,875	$44,587,000	$17,396,000	$67.24	266
2017 Q4	63,947,896	$3,787,217,188	-$69,213,608	$21,373,000	$19,024,000	$59.21	250
2017 Q3	65,121,495	$2,933,896,384	+$169,952,718	$21,219,000	$16,238,000	$45.04	203
2017 Q2	61,875,348	$2,315,593,094	+$118,796,388	$11,610,000	$11,572,000	$37.42	198
2017 Q1	58,970,932	$2,047,608,646	+$289,109,494	$21,282,000	$10,643,000	$34.72	214
2016 Q4	56,270,878	$2,054,638,595	-$50,235,215	$12,073,000	$14,823,000	$36.51	216
2016 Q3	56,772,584	$2,001,698,447	-$19,819,349	$12,009,000	$10,352,000	$35.27	196
2016 Q2	57,316,998	$2,028,989,279	-$5,648,316	$18,183,000	$10,565,000	$35.40	209
2016 Q1	57,795,301	$2,272,363,379	+$199,059,997	$19,769,000	$6,401,000	$39.32	192
2015 Q4	52,511,321	$2,289,134,606	+$21,249,884	$22,766,000	$10,133,000	$43.60	204
2015 Q3	50,930,667	$2,010,212,090	+$148,943,758	$14,224,000	$12,130,000	$39.47	197
2015 Q2	47,312,778	$1,966,323,670	+$53,623,339	$8,456,000	$13,666,000	$41.56	189
2015 Q1	46,179,529	$1,570,325,307	+$56,293,626	$10,075,000	$5,885,000	$34.02	173
2014 Q4	44,740,385	$1,304,952,773	-$2,321,040	$15,943,000	$6,841,000	$29.16	150
2014 Q3	43,995,405	$1,097,570,713	+$19,944,122	$14,238,000	$11,215,000	$24.95	148
2014 Q2	43,203,544	$1,006,160,607	-$17,315,131	$11,697,000	$9,977,000	$23.29	148
2014 Q1	43,984,755	$953,251,011	+$49,685,717	$13,929,000	$9,346,000	$21.67	153