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Interactive Brokers IBKR

Interactive Brokers is the 87th largest S&P 500 company by market cap, worth $137 billion. 9 directors have filed with the SEC in the last 12 months (who counts), 3 of them executives. 2 other officers are on file. At 30 Jun 2026, Vanguard was its largest institutional holder, with 9.3% of its listed stock.

CEO
Milan Galik
Sector
Financials
Sub-industry
Investment Banking & Brokerage
Headquarters
Greenwich, Connecticut
Founded
1977
More
Wikipedia
Market cap
$137B
Includes IBG Holdings units, 23 Oct 2026 close
Revenue
$6.2B
Fiscal year 2025
Price to sales
22.1
Market cap over revenue
Employees
3,182
10-K, 31 Dec 2025
Market cap per employee
$43M
Market cap over employees
Connections
0
S&P 500 companies sharing a director or officer

Largest institutional holders

Each fund group's share of Interactive Brokers' listed stock. The listed stock is 26% of the company; the rest is IBG Holdings units.

13F filings for the quarter to 30 Jun 2026

These five hold 26.2% of Interactive Brokers' listed stock.

Source: SEC Form 13F data sets, SEC XBRL shares outstanding 路 All holders

Board and officers

Roles filed up to 30 Sep 2026

NameTitle
Directors (9)
Milan GalikChief Executive OfficerChief Executive Officer
Jill BrightDirectorLast filed 26 Jan 2026Director
Paul Jonathan BrodyChief Financial OfficerChief Financial Officer
Lori A. ConklingDirectorDirector
Lawrence E. HarrisDirectorDirector
Earl H. NemserVice ChairmanVice Chairman
William PeterffyDirectorLast filed 26 Jan 2026Director
Richard H. RepettoDirectorLast filed 26 Jan 2026Director
Nicole YuenDirectorLast filed 26 Jan 2026Director
Officers (2)
Thomas A.J. FrankExecutive Vice PresidentLast filed 28 May 2026Executive Vice President
Denis MendoncaChief Accounting OfficerLast filed 28 May 2026Chief Accounting Officer

Source: SEC insider filings (Forms 3, 4 and 5), Interactive Brokers' Form 4 filings 路 All directors and officers

Interactive Brokers' market cap since December 2008

Weekly, up to 23 Oct 2026

Show equal percentage changes as equal steps.
201020122014201620182020202220242026$137B

Source: Yahoo Finance closing prices, SEC XBRL shares outstanding

Workforce

Headcount at 31 Dec 2025

Employees
3,182
As of December 31, 2025, we had 3,182 employees worldwide.IBG, Inc.
Interactive Brokers Form 10-K

Source: Interactive Brokers Form 10-K

Insider trades

Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.

Trades from 30 Sep 2025 to 30 Sep 2026

Directors and officers sold $36.7 million of stock in 11 sales and bought $44,364 in 9 purchases in the 12 months to 30 Sep 2026.

DatePersonTitleTypeSharesValue
1 Sep 2026BuyLori A. ConklingDirectorDirectorBuy25$2K
3 Aug 2026BuyLori A. ConklingDirectorDirectorBuy25$2K
1 Jul 2026BuyLori A. ConklingDirectorDirectorBuy25$2K
1 Jun 2026BuyLori A. ConklingDirectorDirectorBuy25$2K
1 May 2026BuyLori A. ConklingDirectorDirectorBuy25$2K
28 Apr 2026SaleLawrence E. HarrisDirectorDirectorSale26,000$2.0M
1 Apr 2026BuyLori A. ConklingDirectorDirectorBuy25$2K
2 Mar 2026BuyLori A. ConklingDirectorDirectorBuy25$2K
25 Feb 2026BuyLori A. ConklingDirectorDirectorBuy50$4K
27 Jan 2026SaleEarl H. NemserVice ChairmanVice ChairmanSale60,200$4.5M

Showing 10 of 20 trades

Source: SEC insider transactions data sets, Interactive Brokers' Form 4 filings

Trades by members of Congress and officials

Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.

Trades from 20 Oct 2023 to 20 Oct 2026

4 people disclosed 7 purchases and 5 sales of Interactive Brokers stock since October 2023.

DateMember or officialTypeAmount
20 Jul 2026Donald J Trump (President)President 路 BoughtPurchase$50,001 to $100,000$50K to $100K
13 Apr 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
24 Feb 2026Rohit Khanna (House, D-CA)House, D-CA 路 SoldSale$1,001 to $15,000$1K to $15K
29 Jan 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
23 Jan 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
14 Oct 2025Lisa McClain (House, R-MI)House, R-MI 路 SoldSale$1,001 to $15,000$1K to $15K
13 Aug 2025Lisa McClain (House, R-MI)House, R-MI 路 BoughtPurchase$1,001 to $15,000$1K to $15K
24 Jun 2025Lisa McClain (House, R-MI)House, R-MI 路 SoldSale$1,001 to $15,000$1K to $15K
17 Jun 2025Lisa McClain (House, R-MI)House, R-MI 路 BoughtPurchase$1,001 to $15,000$1K to $15K
13 Nov 2024Morgan McGarvey (House, D-KY)House, D-KY 路 SoldSale$1,001 to $15,000$1K to $15K

Showing 10 of 12 trades

Source: House, Senate and OGE disclosures via the Congress trading monitor

Not on file: no director or officer shared with another S&P 500 company and no WARN layoff notices under its own name since October 2023.