Sandler O’Neill + PartnersGlobal Exchange and Brokerage Conference

June 3, 2015

DisclaimerThe following information contains certain forward-looking statements that reflect the Company's current views with respect to certain current and future events and financial performance. These forward-looking statements are and will be, as the case may be, subject to many risks, uncertainties and factors relating to the Company's operations and business environment which may cause the Company's actual results to be materially different from any future results, expressed or implied, in these forward-looking statements. Any forward-looking statements are based upon information available to the Company on the date of this presentation. The Company does not undertake to publicly update or revise its forward-looking statements even if experience or future changes make it clear that any statements expressed or implied therein will not be realized. Additional information on risk factors that could potentially affect the Company's financial results may be found in the Company's filings with the Securities and Exchange Commission.

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Agenda

• Company Overview– Our business today– Diversified enterprise– Our key differentiators– Comparative growth– Financial strength

• Appendix– Cost comparison– Best execution– Competition charts– Brokerage growth charts– Recognized industry leader

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Our Business Today

We are the largest U.S. electronic broker as measured by revenue trades

Broad global reach - Access to 100+ markets in 24 countries

Recognized industry leader - Barron’s #1 electronic broker 4 years straight

Highly efficient, scalable business model - $1.4M revenue / employee (4)(5)

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302,000client accounts(3)

18%YoY (3)

account growth

$5.0Bequity capital(1)

648,000daily avg.

revenue trades (1)(2)

63%brokerage pretax

profit(1)(4)

Our company began as a market maker in 1977. We launched our brokerage business in 1993.

Today, brokerage accounts for 86%(1)(4) of Group pretax income.

(1) 1Q15 (2) DARTs are based on client orders (3) 4/30/15 (4) Excludes CHF client losses and GLOBAL impact (5) 1Q15 annualized

Diversified Enterprise

5

Net Revenues1Q2015

Our clients reside in nearly 200 countries

Client Equity$65.2B at 4/30/15

Accounts by Region4/30/15

Individual traders and investors

38%

Financial advisors

27%

Proprietary trading groups

18%

Hedge and mutual funds

7%

Introducing brokers

10%

Other8%

U.S.42%

Asia22%

Europe & Africa28%U.S.

47%International53%

Our Key Differentiators

6

Low Cost & Best Execution

Low execution costs:Stocks $0.0005 to $0.005/ shareOptions $0.15 to $0.70/ contract (1)

Margin rates range from 0.75% to 1.61% (1)

IB achieves the industry’s best price improvement because we do not sell client order flow to internalizers (1)

Breadth of Product

Clients can trade on 100+ market centers in 24 countries and 21 currencies

Electronic market access to stocks, options, futures, forex, bonds, funds, ETFs and CFDs from a single IB Universal AccountTM

Superior Trading Technology

Sophisticated market-maker designed technology

Multiple desktop and mobile trading platforms

Advanced trading tools

60+ order types and algos

API solutions

(1) For additional information see www.interactivebrokers.com

Market Leading Growth

7

Client Accounts Total DARTs Client Equity* Equity per Account*

1Q13 vs 1Q14

1Q14 vs 1Q15

1Q13 vs 1Q14

1Q14 vs 1Q15

1Q13 vs 1Q14

1Q14 vs 1Q15

1Q13 vs 1Q14

1Q14 vs 1Q15

IBKR 16% 18% 25% 11% 38% 25% 19%$195K

6%$206K

ETFC 4% 3% 34% -14% 23% 11% 22%$57K

8%$62K

SCHW 1% 4% 13% -7% 11% 9% 10%$202K

5%$211K

AMTD 5% 5% 30% -3% 19% 13% 14%$99K

7%$106K

* Note that many of IBKR’s clients’ deposits and assets are not in USD and accordingly these numbers are affected by the strength of the USD, our reporting currency.

Financial Strength

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Solid balance sheetMarch 31, 2015: $43 billion total assets, 99% liquid

Low financial leverage

Distributing capital from market making segment

Quarterly dividend of $0.10/share started June 2011 (represents ~10% post-tax return of MM capital)Special dividends paid: $1.00/share in Dec. 2012; $1.79/share in Dec. 2010

Highly Liquid

Low Financial Leverage

Appendix

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$25K $200K $1.5M $3.5M 100 Shares1 Stock Option

1 E-mini S&P 500 Future

Interactive Brokers 1.61% 1.36% 0.98% 0.75% $1.00 $1.00 $0.85

E-Trade 7.94% 6.14% 3.89% 3.89% $7.99 $8.74 $2.99

Fidelity 7.58% 6.58% 3.75% 3.75% $7.95 $8.70 N/A

optionsXpress 8.25% 7.00% 6.00% 6.00% $8.95 $12.95 $3.50

Schwab 8.00% 6.88% 6.25% 6.00% $8.95 $9.70 N/A

TD Ameritrade 8.50% 7.25% 6.25% 6.25% $9.99 $10.74 $2.25

thinkorswim 8.50% 7.25% 6.25% 6.25% $9.99 $10.74 $2.25

US Margin Loan Rates Comparison* US Commission Rates Comparison*

Low Commissions and Financing Rates

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Rated Lowest Margin Rates and Low Cost Broker11 years in a row by Barron’s

* Rates were obtained on March 2, 2015 from each firm’s website. Some of the firms listed may have additional fees and some firms may reduce or waive commissions or fees, depending on account activity or total account value. Supporting documentation for any claims and statistical information will be provided upon request.

Interactive Brokers has lower commission rates for larger volumes and comparable rates worldwide. Services vary by firm.

% Profit % Loss Total Accounts

Spread Markups

Interactive Brokers 45.5% 54.5% 30,398 NO

OANDA 32.5% 67.5% 20,747 YES

Gain Capital 30.0% 70.0% 12,199 YES

IBFX/TradeStation 32.5% 67.5% 1,947 YES

FXCM 33.0% 67.0% 27,520 YES

CitiFX 37.0% 63.0% 601 YES

MB Trading 29.0% 71.0% 2,700 YES

Percentage of profitable and unprofitable accounts as reported to the NFA - Q1 2015

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Data provided by forexmagnates.com, includes the impact of any commissions

The same philosophy and technology that enable our clients to achievesuperior forex trading results also drive our clients’ trading and investing of stocks, options, futures and

bonds worldwide on over 100 market centers.

Forex – Our Clients are More Profitable

IB34%

ETFC16%

SCHW26%

AMTD24%

Effect of IB’s Low Margin Rates

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Dec. 2007Total industry(1)

margin = $29 Billion

Mar. 2015Total industry(1)

margin = $51 Billion

(1) Total industry includes IB, AMTD, SCHW & ETFC

IB6%

ETFC25%

SCHW40%

AMTD29%

Best Price Execution

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Unlike other routers, IB SmartRoutingSM dynamically routes and re-routes all or parts of the order for optimal execution.

We do NOT sell order flow to internalizers.

The Transaction Auditing Group, Inc., (TAG), a third-party provider of transaction analysis, has determined that Interactive Brokers’ U.S. stock and options price executions were significantly better than the industry’s during 2014.

(1) Net Dollar Improvement per Share Definition: ((# of Price Improved Shares * Price Improvement Amount) - (# of Price Disimproved Shares * Price Disimprovement Amount)) / Total Number of Executed Shares

*For more information, visit www.interactivebrokers.com

Net Dollar Price Improvement vs. Best Bid/Offer(1) – 2nd Half 2014

The IB SmartRoutingSM Advantage

US Stocks(per 100 shares)

US Options(per contract)

Interactive Brokers $0.55 $0.99

Industry $0.47 $0.49

IB Advantage $0.08 $0.50

Execution Price Improvement Comparison*

300%

-5%

-5%

-100%

-50%

0%50%

100%

150%

200%

250%

300%

350%Pretax Profits - Normalized to 4Q08

Interactive Brokers (1) Schwab TD Ameritrade

Comparative Growth

14(1) Brokerage segment only. 4Q13 excludes unusual item ($64M Singapore loss)

1Q15 excludes unusual item ($121M CHF event loss)

Making strong progress towards our goal of being the largest broker by profits

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4

6

8

10

12

14

16

100

150

200

250

300

350

Accoun

t Add

s (000

's)

Accoun

ts (0

00's)

Client Accounts

Accounts Account adds

$100

$120

$140

$160

$180

$200

$220

0

10

20

30

40

50

60

70

Equity per Accou

nt (0

00's)

Client Equ

ity $B

Client Equity

Equity Equity per account

20%22%24%26%28%30%32%34%36%38%40%

02468

101214161820

Margin as % of C

lient Equ

ity

Client M

argin ($B)

Margin

Margin Margin as % of Client Equity

‐40%

‐30%

‐20%

‐10%

0%

10%

20%

30%

40%

0

100

200

300

400

500

600

700

800

Year‐over‐year growth

Total Client DAR

Ts (0

00's) DARTs

Total client DARTs YoY Growth

Brokerage Growth

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64.2%57.0%

47.7%37.6%

56.2% 51.4%

18.3%

19.8%

22.2%

27.5%

15.5%16.8%

4.2%

3.6% 15.7%18.0%

16.8% 19.3%

0.5%0.6%

5.6% 7.3%7.4% 6.3%

12.8%19.0%

8.8% 9.6%4.1% 6.2%

Dec 2010 Apr 2015 Dec 2010 Apr 2015 2010 YTD4/30/15

Introducing brokers

Hedge and mutual funds

Proprietary trading groups

Financial advisors

Individual traders andinvestors

Client Accounts Client Equity Commissions

157.9K 302K $22.1B $65.2B $386.8M $208.8M

Client Segment Shift

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9.5% 7.8% 13.5% 10.4% 17.8% 10.5%

15.9% 22.0% 15.8% 21.2%15.3% 23.6%

27.2%28.2%

15.1%19.6% 21.3% 23.1%

47.4% 42.0%55.6% 48.8% 45.6% 42.8%

Other Asia Europe & Africa U.S.

Client Geographic Shift

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Client Accounts Client Equity Commissions

302K157.9K $22.1B $65.2B $386.8M $208.8M

Based on country of legal residence

Recognized Industry Leader

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Winner 2015 “Best Cross-Asset Trading Solution”Winner 2014 “Best Broker-Dealer Overall”Winner 2014 “Best Broker-Dealer Options”

Winner 2014 Stock BrokerageWinner 2014 Futures BrokerageWinner 2014 Forex Brokerage1st Runner Up 2014 Institutional Platform1st Runner Up 2014 Options Analysis Software

IB’s multiple trading platforms, extensive suite of advanced trading tools, algos and order types continue to earn awards, year after year

* Supporting documentation for any claims and statistical information will be provided upon request.For additional information, please see www.interactivebrokers.com

Best for Options TradersBest Trading Experience & TechnologyBest for International TradersBest Range of Offerings

Best for Frequent TradersBest Portfolio Analysis & ReportsLow Cost for 11th

consecutive yearBest Overall

Rated – BEST ONLINE BROKER, AGAIN!

FOR THE FOURTH CONSECUTIVE YEAR!