Quarterlytics / Financial Services / Investment - Banking & Investment Services / Interactive Brokers Group

Interactive Brokers Group

ibkr · NASDAQ Financial Services
Claim this profile
Ticker ibkr
Exchange NASDAQ
Sector Financial Services
Industry Investment - Banking & Investment Services
Employees 501-1000
← All annual reports
FY2017 Annual Report · Interactive Brokers Group
Sign in to download
Loading PDF…
2017 ANNUAL REPORT

819480.indd   17

2/21/18   3:39 PM

A YEAR OF 
MILESTONES

This year, Interactive Brokers...

...celebrated the 40th anniversary 

of our founding. 

...commemorated 10 years as a 

publicly traded company.

... achieved several record setting 

financial accomplishments.

2012   

2017 

Equity Capital

$4.8 billion

$6.4 billion

Customers migrate to 
our platform because 
of our technology, the 
quality of executions, 
compelling prices, 
and our refusal to sell 
our customers’ orders 
to high frequency 
traders.

Accounts

210,000
In over 170 countries

483,000
In over 200 countries

Daily Average 
Revenue Trades

413,000

688,000

Client Equity

$33 billion

$125 billion

Brokerage  
Pretax Profit

$342 million

$860 million

819480.indd   2

2/21/18   3:39 PM

We are laser-focused on 
, whether they are 
We are laser-focused on lowering client trading costs, whether they are 
commissions, margin rates or execution expense. 
commissions, margin rates or execution expense. 

US Margin Loan Rates Comparison11
US Margin Loan Rates Comparison

Commission Rates Comparison11
Commission Rates Comparison

$25K

$300K

$1.5M

$3.5M

Equity Trades

Option Trades

Futures Trades

Interactive Brokers22
Interactive Brokers

N/A

N/A

Interactive Brokers has lower commission rates for larger volumes and comparable rates worldwide. Each firm’s information reflects the standard online trades pricing obtained from their 
Interactive Brokers has lower commission rates for larger volumes and comparable rates worldwide. Each firm’s information reflects the standard online trades pricing obtained from their 
respective websites. Competitor pricing and offers subject to change without notice.
respective websites. Competitor pricing and offers subject to change without notice.

2017 marked the 
2017 marked the 
seventh consecutive 
seventh consecutive 
year that Barron’s 
year that Barron’s 
selected us as the 
selected us as the 
low-cost online 
low-cost online 
broker.44
broker.

Execution Price Improvement Comparison33
Execution Price Improvement Comparison

European Stocks 
per 100 shares

IB Advantage

$0.05

$0.20

€0.78

1.   Rates were obtained on February 5, 2018 from each firm’s website, and are subject to change without notice. The IB equity and futures commission rates shown are the average of the 
Rates were obtained on February 5, 2018 from each firm’s website, and are subject to change without notice. The IB equity and futures commission rates shown are the average of the 
1.   
client commissions for trades executed in January 2018 and are subject to minimums and maximums as shown on the IB website. Some of the firms listed may have additional fees and 
client commissions for trades executed in January 2018 and are subject to minimums and maximums as shown on the IB 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. Services vary by firm. 
some firms may reduce or waive commissions or fees, depending on account activity or total account value. Services vary by firm. 

IB calculates the interest charged on margin loans using the applicable rates for each interest rate tier listed on its website. For additional information, see ibkr.com/interest. Under 
2.  2.  IB calculates the interest charged on margin loans using the applicable rates for each interest rate tier listed on its website. For additional information, see ibkr.com/interest. Under 
some commission plans, overnight carrying fees may apply. Options and futures are risky and are not suitable for all investors. Please review “Characteristics and Risks of Standardized 
some commission plans, overnight carrying fees may apply. Options and futures are risky and are not suitable for all investors. Please review “Characteristics and Risks of Standardized 
Options” and the CFTC Future Trading Risk Disclosure. You can obtain a copy by calling 312 542-6901 before trading these respective products.
Options” and the CFTC Future Trading Risk Disclosure. You can obtain a copy by calling 312 542-6901 before trading these respective products.

Based on independent measurements, the Transaction Auditing Group, Inc., (TAG), a third-party provider of transaction analysis, has determined that Interactive Brokers’ US stock and 
3.  3.  Based on independent measurements, the Transaction Auditing Group, Inc., (TAG), a third-party provider of transaction analysis, has determined that Interactive Brokers’ US stock and 
options price executions were significantly better than the industry’s during the first half of 2017.
options price executions were significantly better than the industry’s during the first half of 2017.

4.4. Low Cost Rated by Barron’s - Low cost broker 2002 through 2016 according to Barron’s online broker reviews. Barron’s is a registered trademark of Dow Jones & Co. Inc. 

For additional information, see ibkr.com/info

819480.indd   3

2/28/18   11:47 AM

NEW PRODUCTS, NEW MARKETS
NEW PRODUCTS, NEW MARKETS

With the launch of the 
With the launch of the 
Interactive Brokers Debit Mastercard®, , 
we have established an integrated, 
we have established an integrated, 
one-account financial management 
one-account financial management 
solution for our clients. 
solution for our clients. 

NOW, FROM A SINGLE PLATFORM, CLIENTS MAY: 

● Borrow at our margin rates, which 
 at our margin rates, which 
range between 1.72% and 2.92%11, far 
, far 
range between 1.72% and 2.92%

below most conventional lenders.
below most conventional lenders.

● Earn 0.92% APR

 0.92% APR22 on qualifying idle 
 on qualifying idle 

cash balances, and generate extra 
cash balances, and generate extra 

income by lending fully paid shares.
income by lending fully paid shares.

● Spend up to the amount of the eligible equity available 
 up to the amount of the eligible equity available 

in your brokerage account.
in your brokerage account.

Use the debit card at merchants worldwide, or select it 
● Use the debit card at merchants worldwide, or select it 

as the default payment source on Apple Pay®, and use 
as the default payment source on Apple Pay®, and use 

your iPhone® to make secure purchases. 
your iPhone® to make secure purchases. 

● Invest in stocks, options, futures, forex and bonds on  
 in stocks, options, futures, forex and bonds on  

over 120 global market centers at low cost11..
over 120 global market centers at low cost

1.  Supporting documentation for any claims and statistical information 
will be provided upon request. For complete information about the 
Interactive Brokers Debit Mastercard rates, go to ibkr.com/debitcard.

2.  Credit interest rate as of 2/5/2018. USD credit interest is paid 

on balances over USD 10,000 in accounts with Net Asset Value 
exceeding USD 100,000. For more information, see ibkr.com/interest.

Margin borrowing is only for sophisticated investors with high risk tolerance. You may lose more than your initial investment.

SEAMLESS ACCESS TO CHINA’S MARKETS 

Our clients are already trading the 222 China A large-cap companies
222 China A large-cap companies
that MSCI will add to its Emerging Market Index in 2018.

Interactive Brokers’ clients were able to trade China A shares beginning in late 2016, after we provided 

access to the emerging industries of the world’s second-largest economy.

819480.indd   4

2/28/18   11:47 AM

Meeting Customer Needs

BANK DEPOSIT SWEEP PROGRAM

IBKR’s Insured Bank Deposit Sweep Program lets clients supplement their existing $250,000 
IBKR’s Insured Bank Deposit Sweep Program lets clients supplement their existing $250,000 

SIPC coverage with up to $2,500,000 of FDIC insurance on eligible cash balances.
SIPC coverage with up to $2,500,000 of FDIC insurance on eligible cash balances.

FOREX AUTO-SWAP PROGRAM

Eligible clients who carry large forex positions can participate, at no cost, in the 
Eligible clients who carry large forex positions can participate, at no cost, in the 

Interbank forex swaps market, instead of the higher-cost retail deposit market.
Interbank forex swaps market, instead of the higher-cost retail deposit market.

BITCOIN FUTURES

Bitcoin futures began trading in December 2017 on both the Cboe
Bitcoin futures began trading in December 2017 on both the Cboe

Futures Exchange and the CME. Interactive Brokers was ready on 
Futures Exchange and the CME. Interactive Brokers was ready on 

the first day of trading at each exchange.
the first day of trading at each exchange.

TRADING IN BITCOIN FUTURES IS ESPECIALLY RISKY AND IS ONLY FOR CLIENTS  
WITH A HIGH RISK TOLERANCE AND THE FINANCIAL ABILITY TO SUSTAIN LOSSES.
For more information about the risks of trading Bitcoin products, go to ibkr.com/bitcoin.

We have remained 
as entrepreneurial in 
our approach to new 
markets as we were 
40 years ago.

819480.indd   5

2/28/18   11:47 AM

PROPRIETARY TECHNOLOGY 
DRIVES INNOVATION

Automation through 
best-in-class software 
engineering is 
our competitive 
advantage.

819480.indd   6

2/28/18   11:47 AM

  introduced in 2017 included:
New New technology initiatives introduced in 2017 included:

IBOT

Trade and manage your account wherever you are simply and easily 
● Trade and manage your account wherever you are simply and easily 

using text or voice.
using text or voice.

IBot is now integrated with several popular chatbot and voice assistants, 
● IBot is now integrated with several popular chatbot and voice assistants, 

so clients can access these benefits no matter what platform they use.
so clients can access these benefits no matter what platform they use.

NEW CLIENT PORTAL

Access all the features and services of your account from anywhere.
● Access all the features and services of your account from anywhere.

One login takes you to all our web tools and a streamlined view of your account.
● One login takes you to all our web tools and a streamlined view of your account.

NEW ORDER MANAGEMENT SYSTEM (OMS) 
FOR ADVISORS AND INSTITUTIONAL CLIENTS

The new OMS features an intuitive, easy-to-use interface that moves  
● The new OMS features an intuitive, easy-to-use interface that moves  

seamlessly between desktop and mobile devices.
seamlessly between desktop and mobile devices.

A new pre-trade compliance tool was added to support the trading and 
● A new pre-trade compliance tool was added to support the trading and 

regulatory requirements of our growing institutional investor client base.
regulatory requirements of our growing institutional investor client base.

ENHANCED TRADING ALGORITHMS

Adaptive Algo – a tool to achieve a fast fill at the best all-in price,  
● Adaptive Algo – a tool to achieve a fast fill at the best all-in price,  

 capabilities.
using IB’s SmartRoutingSMSM capabilities.
using IB’s SmartRouting

Accumulate/Distribute – a tool to achieve the best price for large volume orders.
● Accumulate/Distribute – a tool to achieve the best price for large volume orders.

We provide our customers with state-of-the-art 
technology and algorithms at the lowest cost1 in 
the electronic trading industry (for free).

1. Supporting documentation for any claims and statistical information will 
be provided upon request. For more information go to ibkr.com/info

819480.indd   7

2/28/18   11:47 AM

 819480.indd   8

2/28/18   11:47 AM

ELECTRONIC BROKERAGE IS NOW THE
 IS NOW THE
DRIVING FORCE OF OUR BUSINESS
DRIVING FORCE OF OUR BUSINESS

The majority of our options market-making operation, which was founded in 1977 under the Timber Hill 

name, was transferred to Two Sigma Securities, LLC in September 2017. Widely considered an industry 

pioneer in electronic trading, Timber Hill and its technology became the foundation of our electronic 

brokerage business, providing a key competitive edge. Capital freed up from the transaction will be 

used to strengthen and power our electronic brokerage business.

We are the  

largest public U.S. 

electronic broker as 

measured by Daily 

Average Revenue  

Trades (DARTs)

We are the 

 fastest organically 

growing electronic 

broker in the  

United States

We execute more  

than 1 million trades  

per day at over 

120 market centers 

worldwide

Our positive growth 
outlook is supported by 
domestic RIAs departing 
traditional institutions to 
launch their own firms, and 
by an emerging investor 
class worldwide.

819480.indd   9

2/28/18   11:47 AM

INTERACTIVE BROKERS 
INTERACTIVE BROKERS 
ASSET MANAGEMENT
ASSET MANAGEMENT
Combining the attributes of active stock selection with the low cost of passive ETFs 
Combining the attributes of active stock selection with the low cost of passive ETFs 
to deliver a broad range of 
to deliver a 

 to our customers.
 of separate account investment choices to our customers.

In 2017 we launched:
In 2017 we launched:

SMART BETA

Ten proprietary portfolios that invest in diversified baskets of 
Ten proprietary portfolios that invest in diversified baskets of 

securities, and charge an annual management fee of 0.08%.
securities, and charge an annual management fee of 0.08%.

IB ASSET ALLOCATION

Six automated strategies that offer diversified ETF portfolios 
Six automated strategies that offer diversified ETF portfolios 

across asset classes, and charge 0.09% per year.
across asset classes, and charge 0.09% per year.

ACTIVELY MANAGED PORTFOLIOS

Several actively managed portfolio choices, vetted by our due 
Several actively managed portfolio choices, vetted by our due 

diligence team, were added to our marketplace.
diligence team, were added to our marketplace.

Management fees range from 0.25% to 1.5% per year for 
● Management fees range from 0.25% to 1.5% per year for 

standard and performance-based structures.
standard and performance-based structures.

Incentive compensation varies between 2% and 12%.
● Incentive compensation varies between 2% and 12%.

These portfolios are a key component 
These portfolios are a key component 

of our strategy to create a global money 
of our strategy to create a global money 

management platform that meets the needs 
management platform that meets the needs 

of individuals and RIAs.
of individuals and RIAs.

Making investing  
easy, transparent  
and inexpensive is  
our mission.

Note:  Currently, only US residents can open accounts with Interactive Brokers Asset Management. 
In addition to the above management fees, clients investing in any of our portfolios will also incur 

commissions for all transactions in their accounts.  All trading is through our affiliated broker-dealer, 

Interactive Brokers LLC, who collects these commissions.  Our disclosures, agreements, Form ADV 

disclosure brochure, and various risk disclosures are available on our website at these 

locations: site.ibkram.com/help/disclosures and site.ibkram.com/agreements

819480.indd   10

2/28/18   11:47 AM

xWE WERE ONCE AGAIN 
INDUSTRY LEADER 
RECOGNIZED AS AN INDUSTRY LEADER 

2017 BARRON’S AWARDS1:

Interactive Brokers earned an overall rating of 4.5

Rated 4.5 for Best for Options Traders

Rated 4.2 for Lowest Cost

Rated 4.9 for Best Portfolio Analysis and Reports

Rated 4.7 for Best Trading Experience and Technology

Rated of 4.5 for Best for Frequent Traders

Rated 4.7 for Range of Offerings

2017 STOCKBROKERS.COM:

Rated #1 for Commissions and Fees

Rated #1 for International Trading

Rated #1 for Active Trading

                    Earned a 5 star rating for Options Trading

Earned a 5 star rating for Order Execution

Earned a 5 star rating for Active Trading

Earned a “Best in Class” rating for Offering of Investments

Earned a “Best in Class” rating for Mobile Trading

2017 FUND TECHNOLOGY AND WSL INSTITUTIONAL AWARDS:

Best Broker-Dealer Futures

Best Broker-Dealer Options

2017 HFM WEEK US HEDGE FUND SERVICES AWARDS:

Best Prime Broker Technology

2017 CTA SERVICES AWARDS:

Best FCM Technology - US

Best FCM Technology - Europe

Member NYSE, FINRA, SIPC. Supporting documentation for any claims and statistical information will be provided upon request. 

1.  Barron’s is a registered trademark of Dow Jones & Company, Inc. 

For more information, see ibkr.com/awards

819480.indd   11

2/28/18   11:47 AM

xINDUSTRY-LEADING GROWTH
INDUSTRY-LEADING 

CLIENT ACCOUNTS
(Thousands)

19%
Growth*

CLIENT EQUITY
(Billions)

29%
Growth*

TOTAL CLIENT DARTs
(Thousands)

9%
Growth*

500

400

300

200

100

0

$140

$120

$100

$80

$60

$40

$20

$0

700

600

500

400

300

200

100

0

483 

385

331

281

239

20132013

20142014

20152015

20162016

20172017

$124.8

$85.5

$67.4

$45.7

$56.7

20132013

20142014

20152015

20162016

20172017

647

660

688

566

486

* Four-year compound annual growth rate

20132013

20142014

20152015

20162016

20172017

819480.indd   12

2/28/18   11:47 AM

   FINANCIAL STRENGTH
FINANCIAL 

GROWING BALANCE SHEET

99% of our balance sheet is comprised of liquid assets.
99% of our balance sheet is comprised of liquid assets.

Liquid Assets

Total Assets

S
N
O

I

L

L

I

B

$70

$60

$50

$40

$30

$20

$10

$0

$37.9

$$37.437.4

$43.4

$$43.043.0

$48.7

$$48.348.3

$61.2

$54.7

$$54.254.2

$$60.860.8

20132013

20142014

20152015

20162016

20172017

STRONG CAPITAL BASE

Over $4B of capital in excess of regulatory requirements. 
Over $4B of capital in excess of regulatory requirements. 

$6.4B of equity. 
$6.4B of equity. 

Equity

No long-term debt.
No long-term debt.

$5.1

$5.2

$5.3

$6.4

$5.8

S
N
O

I

L

L

I

B

$7

$6

$5

$4

$3

$2

$1

$0

20132013

20142014

20152015

20162016

20172017

819480.indd   13

2/28/18   11:47 AM

   February 18, 2018

Dear Shareholders:

Ever since we started our business, almost 41 years ago, we have been 
convinced that by focusing primarily on automation, building and optimally 
combining application software modules, we would be able to offer superior 
services at lower cost than traditional and discount brokers.

Our conviction and focus have not changed.  
Our ability to automate allows us to take on the challenges of continuously expanding our user functionality, 
product offering, execution venues, geographically diversified customer base, and to comply with more and 
different regulatory regimes. 

We believe that free market capitalism tends to maximize the sum total of economic outcomes of all 
participants, and we strive to make our platform an ever more important node in this evolving, global network. 
Realizing that vision will continue to be a never-ending effort in which we need all the cooperation and help  
our customers and shareholders can give us.

The reason we went public 11 years ago was not to raise capital. By that time we had more than sufficient 
capital from retained earnings and we still do not expect to need any outside capital in the future. We went 
public to raise our profile and as an adjunct to our marketing efforts, in the hope of gaining more customers 
who would help us become better at servicing them.  
This is still our goal today.

Passive investors and shareholders who are not our customers benefit from our hard work, but they also 
crowd out potential customer-investors with whom we are happy to share our success. For this reason we ask 
you to become a customer and experience our platform before becoming a shareholder of Interactive Brokers. 
You may discover that we are not the broker for you and decide not to buy our shares; or, as we hope, you  
may choose to become a positive, contributing force in our growth.

Most of our users are not familiar with all the features of our platform and we introduce new ones all the time. 
We ask all of our existing and prospective customers to join us on our platform; explore, discover and experiment 
with what we provide; give us your suggestions and tell everyone what you think of Interactive Brokers.

Looking ahead, we have every reason to believe that we will be able to continue to extend the capabilities  
of our platform, and that this will drive our growth and maintain and possibly even increase our momentum 
in 2018 and beyond.

Thank you for your attention.

Sincerely,

Thomas Peterffy
Founder and CEO

819480.indd   14

2/28/18   11:47 AM

Interactive  Brokers  Group,  Inc.  

2017  

Financial  Information  
Form  10-­K  

(This page has been left blank intentionally.)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K
ANNUAL REPORT PURSUANT TO  SECTION 13  OR  15(d) OF  THE  SECURITIES
EXCHANGE ACT OF 1934

For the  year ended December 31, 2017

Commission File Number: 001-33440

INTERACTIVE BROKERS GROUP, INC.

(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

30-0390693
(I.R.S. Employer
Identification No.)

One Pickwick Plaza
Greenwich, Connecticut 06830
(Address of principal executive office)

(203) 618-5800
(Registrant’s telephone number, including area code)

Securities registered  pursuant  to Section 12(b) of the Act:

Title of each class

Name  of the each exchange on which registered

Common Stock, par  value $.01  per  share

The NASDAQ Stock Market LLC
(NASDAQ Global Select Market)

Securities registered  pursuant  to Section 12(g) of the Act: None

Indicate by  check mark  whether the registrant is  a  well-known seasoned issuer, as defined in Rule 405 of the securities
act.  Yes (cid:1) No  (cid:2)

Indicate by check mark whether the registrant is  not  required to file reports pursuant to Section 13 or 15(d) of the
act. Yes (cid:2) No  (cid:1)

Indicate by  check mark  whether the registrant (1)  has filed all reports required to be filed by Section 13 or 15(d) of the
Securities Exchange Act of 1934  during the  preceding 12 months (or for such shorter period that the registrant was required to
file  such reports), and (2) has  been  subject  to  such  filing requirements for the past 90 days. Yes (cid:1) No (cid:2)

Indicate by  check mark if disclosure  of delinquent  filers pursuant to Item 405 of Regulation S-K is not contained herein, and
will  not be contained,  to the best  of  registrant’s knowledge, in definitive proxy or information statements incorporated by
reference in Part III of  this Form  10-K  or  any  amendment to this Form 10-K. (cid:2)

Indicate by  check mark whether the registrant has  submitted electronically and posted on its corporate Web site, if any, every
Interactive Data File required to  be submitted  and  posted pursuant to Rule 405 of Regulation S-T during the preceding
12 months (or for such  shorter period  that  the registrant was required to submit and post such files). Yes (cid:1) No (cid:2)

Indicate by  check mark whether the registrant is  a  large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller
reporting company, or an  emerging growth company. See the definitions of ‘‘large accelerated filer,’’ ‘‘accelerated filer,’’
‘‘smaller  reporting  company,’’ and ‘‘emerging growth  company’’ in Rule 12b-2 of the Exchange Act. (Check one):
Large  accelerated  filer (cid:1)

Accelerated filer  (cid:2)

Non-accelerated filer  (cid:2)
(Do not check if a
smaller reporting company)

Smaller reporting company  (cid:2)
Emerging growth company (cid:2)

If  an  emerging growth company, indicate  by  check mark if the registrant has elected not to use the extended transition period
for complying with any new or revised financial  accounting standards provided pursuant to Section 13(a) of the Exchange
Act.  (cid:2)

Indicate by  check mark whether the registrant is  a  shell company (as defined in Rule 12b-2 of the Exchange
Act). Yes (cid:2) No  (cid:1)

The aggregate market value  of the voting  and  non-voting common equity stock held by non-affiliates of the registrant was
approximately $2,544,471,315 computed  by  reference  to the $37.42 closing sale price of the common stock on the NASDAQ
Global  Select Market, on  June 30, 2017,  the  last business day of the registrant’s most recently completed second fiscal quarter.

As of February 23, 2018,  there  were 71,475,755  shares of the issuer’s Class A common stock, par value $0.01 per share,
outstanding and 100  shares  of the issuer’s Class  B common stock, par value $0.01 per share, outstanding.

Documents Incorporated  by  Reference: Portions of Registrant’s definitive proxy statement for its 2018 annual meeting of
shareholders are incorporated  by reference  in  Part  III of this Form 10-K.

ANNUAL REPORT ON FORM 10-K FOR THE YEAR  ENDED DECEMBER 31, 2017

Table of Contents

Cautionary Note Regarding Forward  Looking  Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PART I

ITEM  1.
ITEM  1A.
ITEM  1B.
ITEM  2.
ITEM  3.
ITEM  4.

PART II

ITEM  5.

ITEM  6.
ITEM  7.

ITEM  7A.
ITEM  8.
ITEM  9.

ITEM  9A.
ITEM  9B.

PART III

ITEM  10.
ITEM  11.
ITEM  12.

ITEM  13.
ITEM  14.

PART IV

Business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unresolved Staff Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Legal Proceedings and Regulatory Matters . . . . . . . . . . . . . . . . . . . . . . . .
Mine Safety Disclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Market for Registrant’s Common Equity, Related  Stockholder Matters and
Issuer Purchases of Equity Securities . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selected Financial  Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Management’s Discussion and  Analysis  of  Financial Condition  and Results

of Operations

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quantitative and Qualitative Disclosures about Market  Risk . . . . . . . . . . .
Financial Statements  and Supplementary  Data . . . . . . . . . . . . . . . . . . . . .
Changes in and Disagreements with Accountants on Accounting and

Financial Disclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Directors, Executive  Officers and Corporate Governance . . . . . . . . . . . . . .
Executive Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security Ownership of  Certain Beneficial Owners and Management and

Related Stockholder Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transactions with  Related  Persons, Promoters and Certain Control Persons .
Principal Accountant  Fees and Services . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

2
22
33
34
34
36

37
41

43
77
84

133
133
137

137
137

137
137
137

ITEM  15.
ITEMS 15  (a)(1)
and 15 (a)(2)

SIGNATURES

Exhibits and Financial Statement Schedules . . . . . . . . . . . . . . . . . . . . . . .

138

Index to Financial Statements and Financial Statement Schedule . . . . . . . .

141

i

CAUTIONARY NOTE REGARDING  FORWARD-LOOKING STATEMENTS

We  have included or incorporated by reference in  this  Annual Report  on Form 10-K, and from time  to
time our management may make statements that may constitute ‘‘forward-looking statements’’ within
the meaning of the safe harbor provisions  of the Private Securities Litigation Reform  Act of 1995.
Forward-looking statements are not historical facts,  but instead represent only our beliefs regarding
future events, many of which, by their  nature, are inherently uncertain  and outside our control. These
statements include statements other  than historical information or statements of current condition and
may relate to our future plans and objectives and results,  among  other  things, and  may also include  our
belief regarding the effect of various legal proceedings,  as set forth under ‘‘Legal Proceedings’’ in
Part I, Item 3 of this Annual Report on Form 10-K, as  well as  statements about the objectives and
effectiveness of our liquidity policies,  statements  about trends in or growth opportunities  for our
businesses, in ‘‘Management’s Discussion and  Analysis  of Financial Condition and  Results of
Operations’’ in Part II, Item 7 of this Annual  Report  on Form 10-K. By identifying  these statements  for
you in this manner, we are alerting you  to the possibility that our actual results  may differ, possibly
materially, from the anticipated results indicated in these forward-looking statements. Important  factors
that could cause actual results to differ  from those in the forward-looking statements include, among
others, those  discussed below and under ‘‘Risk Factors’’  in Part I,  Item  1A of this Annual Report on
Form 10-K and ‘‘Management’s Discussion  and Analysis of Financial Condition and Results of
Operations’’ in Part II, Item 7 of this Annual  Report  on Form 10-K.

Factors that could cause actual results  to  differ materially from any  future results,  expressed  or implied,
in these forward-looking statements include,  but are  not limited to, the following:

(cid:127) general economic conditions in the  markets where we  operate;

(cid:127) increased industry competition and downward  pressures  on bid/offer  spreads in the  remaining

market making business we still operate and electronic brokerage commissions;

(cid:127) risks inherent to the electronic market  making and brokerage businesses;

(cid:127) implied versus actual price volatility levels of the  products in  which we  continue to make

markets;

(cid:127) the general level of interest rates;

(cid:127) failure to protect or enforce our intellectual property rights in our proprietary  technology;

(cid:127) our ability to keep up with rapid technological change;

(cid:127) system failures and disruptions;

(cid:127) non-performance of third-party vendors;

(cid:127) conflicts of interest and other risks  due to our ownership and holding company structure;

(cid:127) the loss of key executives and failure to recruit  and  retain qualified  personnel;

(cid:127) the risks associated with the expansion  of our business;

(cid:127) our possible inability to integrate any businesses we acquire;

(cid:127) compliance with laws and regulations, including those  relating to the  securities industry;  and

(cid:127) other factors discussed under ‘‘Risk Factors’’ in Part I, Item 1A of  this Annual Report  on

Form 10-K or elsewhere in this Annual  Report on Form 10-K.

We  undertake no obligation to publicly update or revise any forward-looking statements to reflect
events or circumstances that may arise after the date of this  Annual  Report on Form 10-K.

1

ITEM 1. BUSINESS

Overview

PART I

Interactive Brokers Group, Inc. (‘‘IBG, Inc.’’ or  the ‘‘Company’’) is an automated global  electronic
broker and market maker (although,  we  have substantially  exited  the options market making business—
see Note 2—Discontinued Operations  and  Costs Associated with Exit or Disposal Activities to the
audited consolidated financial statements in Part  II Item 8  of  this Annual  Report on Form  10-K).  We
custody and service accounts for hedge and mutual funds,  registered investment advisors, proprietary
trading groups, introducing brokers and  individual  investors. We specialize in routing orders while
striving to achieve best executions and  processing trades  in securities, futures, foreign  exchange
instruments, bonds and mutual funds on more  than 120  electronic exchanges and market  centers
around the world. In the United States (‘‘U.S.’’),  we conduct our business primarily  from our
headquarters in Greenwich, Connecticut and from Chicago, Illinois. Abroad,  we conduct our business
through offices located in Canada, the  United Kingdom, Switzerland,  Liechtenstein, India, China (Hong
Kong and Shanghai), Japan and Australia.  As of December 31, 2017 we had 1,228  employees
worldwide.

IBG, Inc. is a holding company and our  primary  assets are our  ownership  of  approximately  17.4% of
the membership interests of IBG LLC (the ‘‘Group’’), the  current holding company  for our businesses.
We  are the sole managing member of IBG  LLC. On May  3, 2007, IBG, Inc.  priced its initial public
offering (the ‘‘IPO’’) of shares of common stock. In connection  with the  IPO, IBG, Inc. purchased
10.0% of the membership interests in  IBG LLC and began to consolidate IBG LLC’s  financial  results
into its financial statements.

When we use the terms ‘‘we,’’ ‘‘us,’’ and ‘‘our,’’ we mean IBG LLC  and its  subsidiaries  for periods
prior to the IPO, and IBG, Inc. and its  subsidiaries (including IBG LLC) for periods  from and  after
the IPO. Unless otherwise indicated, the  term ‘‘common stock’’ refers  to  the Class A common  stock  of
IBG, Inc.

We  are a successor to the market making  business founded by our Chairman and  Chief  Executive
Officer, Mr. Thomas Peterffy, on the floor of  the American Stock Exchange in  1977. Since our
inception, we have focused on developing proprietary  software to automate broker-dealer functions.
During  that time, we have been a pioneer in  developing  and  applying technology as a financial
intermediary to increase liquidity and transparency in  the capital markets in  which we  operate.  The
proliferation of electronic exchanges  in the  last 27  years  has provided us  with the opportunity to
integrate our software with an increasing  number of exchanges and  market centers into one
automatically functioning, computerized platform  that requires minimal human intervention. Over four
decades of developing our automated trading platforms and our automation of many middle and back
office functions have allowed us to become one of the  lowest cost  providers of broker-dealer services
and significantly increase the volume of  trades we handle.

Our activities are divided into two principal business segments: (1)  electronic brokerage and (2) market
making (being discontinued):

(cid:127) As a direct market access broker, we serve  the customers  of both traditional brokers and prime
brokers. We provide our customers with an  advanced order management,  trade execution and
portfolio management platform at a very  low cost. Our customers can  simultaneously access
many  financial markets worldwide and  trade across multiple asset classes  (stocks,  options,
futures, foreign exchange (‘‘forex’’), bonds  and  mutual  funds) denominated in 23  different
currencies, on one screen, from a single account based in any  major currency.  Our large
financial advisor and broker-dealer customers may  ‘‘white  brand’’ our trading interface
(i.e., make our trading interface available to their customers  without  referencing our  name),  or

2

they can select from among our modular functionalities,  such as order  routing,  trade reporting
or clearing on specific products or exchanges where they  may not have up-to-date technology  to
offer their customers a comprehensive, global range of services and products. The emerging
complexity of multiple market centers provided us with the opportunity  of  building and
continuously adapting our order routing software to secure excellent execution prices  for our
customers.

(cid:127) As a market maker, we provide continuous bid and  offer  quotations  on  securities and futures
products listed on some electronic exchanges around the world. Our quotes  are driven  by
proprietary mathematical models that assimilate  market  data and  reevaluate our outstanding
quotes many times per second. In the past several years our market making business has
suffered from competitive pressures and, along  with the  rapid increase  in our electronic
brokerage business, we decided to discontinue our market making activities globally. On
March 8, 2017 we announced our intention to discontinue our  options market making activities
globally and we are currently in the process  of  winding down these operations. Additionally,  as
we previously announced, we entered  into  a definitive transaction to transfer our U.S.  options
market making operations to Two Sigma Securities, LLC. This  transaction closed on
September 29, 2017. We intend to continue conducting certain proprietary trading activities  in
stocks and related instruments to facilitate our electronic  brokerage customers’ trading in
products such as ETFs, ADRs, CFDs and other financial instruments.

Our electronic brokerage business benefits  from our scale and  volume, as well as  from our proprietary
technology, and expertise developed over  the last  40 years. Our  focus on  the development and
maintenance of our unique technology for  trading,  risk management, clearing,  settlement, banking and
regulatory compliance enables us to provide lower transaction  costs to our customers than our
competitors. In addition, we believe we gain  a competitive advantage by applying the software features
we have developed for a specific product or market to newly-introduced products and markets over
others who may have less automated facilities or  who operate only in a subset of the exchanges and
market centers on which we operate. Our  brokerage system contains unique architectural  aspects that
may impose a significant barrier to entry for firms wishing  to  compete in this business and permit  us to
compete favorably against our competitors. In addition, many  of  our regulatory and compliance
functions have been built into our integrated order routing and custodial systems.

Our internet address is www.interactivebrokers.com and the investor relations section of  our website is
located at www.interactivebrokers.com/ir.  We make available free  of  charge, on or  through the investor
relations section of our website, this Annual  Report  on Form 10-K, Quarterly  Reports on Form 10-Q,
related Interactive Data exhibits, Current  Reports on Form  8-K and amendments to those reports filed
or furnished pursuant to Section 13(a) or  15(d) of the Securities  Exchange Act of  1934, as well  as
proxy statements, registration statements, prospectus  supplements, and Section 16  filings  for our
directors and officers, as soon as reasonably  practicable  after we  electronically file such material with,
or furnish it to, the U.S. Securities and Exchange Commission  (‘‘SEC’’). Also posted on  our  website
are our Bylaws, our Amended and Restated  Certificate of Incorporation, charters for the Audit
Committee, Compensation Committee and Nominating and Corporate Governance  Committee  of  our
board of directors, our Accounting Matters Complaint  Policy, our Whistle  Blower Hotline,  our
Corporate Governance Guidelines and  our Code of Business Conduct and  Ethics governing our
directors, officers and employees. Within  the time periods required by  SEC and  the NASDAQ  Stock
Market (‘‘NASDAQ’’), we will post on  our website any amendment  to  the Code of Business Conduct
and Ethics and any waiver applicable  to  any  executive officer, director or senior  financial  officer.  In
addition, our website includes information concerning purchases and  sales  of our  equity securities  by
our  executive officers and directors, as well as disclosure relating  to  certain non-GAAP  financial
measures (as  defined in Regulation G) promulgated under the Securities  Act of 1933, as  amended (the
‘‘Securities Act’’) and the Securities Exchange Act of 1934,  as amended  (the ‘‘Exchange  Act’’) that we
may make public orally, telephonically,  by webcast, by broadcast  or by similar means  from time  to  time.

3

Our Investor Relations Department can  be contacted at Interactive Brokers Group,  Inc., Eight
Greenwich Office Park, Greenwich, Connecticut  06831, Attn: Investor  Relations, telephone:
203-618-4070, e-mail: investor-relations@interactivebrokers.com.

Our Organizational Structure and Overview  of Recapitalization  Transactions

The graphic below illustrates our current ownership structure  and reflects current ownership
percentages. The graphic below does not display  the subsidiaries  of  IBG  LLC.

Public Stockholders

IBG Holdings LLC Members

(cid:127) 100.0% owner of Class A common stock
Approximately 17.4% voting interest in IBG, Inc.
(cid:127)
(cid:127) Approximately 100% economic interest in IBG, Inc.

(cid:127) Controlled by Mr. Thomas Peterffy, as the sole voting

member and sole managing member

(cid:127) Mr. Thomas Peterffy and his affiliates own approximately

89.2% of the membership interests

Interactive Brokers 
Group, Inc. (IBG, Inc.) 
Public company 
(NASDAQ: IBKR)

(cid:127) Sole managing member
(cid:127) Approximately 17.4% of membership interests

IBG Holdings LLC

(cid:127) 100% owner of Class B common stock
(representing approximately 82.6%
voting interest in IBG, Inc.)

(cid:127) Approximately 82.6% of membership interests

IBG LLC

Operating Subsidiaries of IBG LLC

23FEB201803053142

Prior to the IPO, we had historically conducted our business through a limited  liability  company
structure. Our primary assets are our ownership of approximately 17.4% of the  membership interests of
IBG LLC, the current holding company for our businesses, and  our controlling interest and related
contractual rights as the sole managing member of IBG LLC. The remaining approximately  82.6% of
IBG LLC membership interests are held by IBG Holdings LLC (‘‘Holdings’’), a holding company  that
is owned by our founder, Chairman and  Chief  Executive Officer, Mr. Thomas  Peterffy and his affiliates,
management and other employees of IBG LLC, and certain other members.  The IBG  LLC
membership interests held by Holdings  will  be  subject to purchase by us over time in connection with

4

offerings by us of shares of our common  stock. The below table shows the amount of IBG LLC
membership interests held by IBG, Inc. and Holdings as of December 31, 2017.

Ownership % . . . . . . . . . . . . . . . . . . . . . .
Membership interests . . . . . . . . . . . . . . . . .

17.4%

82.6%

100.0%

71,479,604

340,229,444

411,709,048

IBG, Inc.

Holdings

Total

Purchases of IBG LLC membership interests, held  by Holdings, by  the Company are governed by the
exchange agreement among us, IBG LLC, Holdings  and  the historical members of IBG LLC, (the
‘‘Exchange Agreement’’), a copy of which  was filed as  an exhibit to our Quarterly  Report  on
Form 10-Q for the quarter ended September 30,  2009 and filed  with the SEC  on November  9, 2009.
The Exchange Agreement, as amended  June  6, 2012, provides that the Company  may facilitate the
redemption by Holdings of interests  held  by its members through the issuance of shares  of common
stock through a public offering in exchange  for the  interests in IBG  LLC  being  redeemed by Holdings.
The June 6, 2012 amendment (the ‘‘Amendment’’), which was  filed as an exhibit to our Form 8-K  filed
with the SEC on June 6, 2012, eliminated  from the Exchange Agreement an  alternative funding
method, which provided that upon approval  by the board  of directors  and  by  agreement of the
Company, IBG LLC and Holdings, redemptions could  be  made in  cash.

At the time of the Company’s IPO in 2007, three  hundred sixty (360) million shares of  authorized
common stock were reserved for future sales and redemptions. From 2008  through 2010, Holdings
redeemed 5,013,259 IBG LLC shares  for a  total of $114 million, which redemptions were funded using
cash on hand at IBG LLC. Upon cash redemption these IBG LLC shares were  retired.

In June 2011, with the consent of Holdings and the Company (on its  own behalf  and acting as  the sole
managing member of IBG LLC), IBG  LLC agreed  to  redeem certain membership interests from
Holdings through the sale of common stock and  to  distribute the  proceeds of such sale  to  the beneficial
owners of such membership interests. On  August  4, 2011 and November  12, 2013 the  Company filed
‘‘shelf’’  Registration Statements on Form S-3 (File Number 333-176053 and 333-192275)  with the SEC
for the issuance of additional shares  in  connection with  Holdings requesting redemption of a  portion of
its  member interests in IBG LLC. Under these shelf registration statements, the Company issued
12,643,495 shares of common stock (with  a fair value of  $362  million)  to  Holdings  in exchange for  an
equivalent number of shares of member interests in  IBG  LLC.

On July 28, 2017, the Company filed  a ‘‘shelf’’ Registration  Statement on  Form  S-3 (File
Number 333-219552) with the SEC for  the  issuance  of  additional  shares in connection with Holdings
requesting redemption of a portion of  its member interests  in IBG LLC.  Under  this  shelf registration
statement, in 2017, the Company issued  1,214,860 shares of common  stock  (with a fair value of
$49 million) to Holdings in exchange  for  an equivalent number of shares of member interests in
IBG LLC.

5

Segment Operating Results

Electronic Brokerage . . . . . . . . . Net revenues

Non-interest expenses(1)

Income before income taxes

Year Ended December 31,

2017

2016

2015

$1,405
545

$ 860

(in millions)
$1,239
483

$ 756

$1,097
561

$ 536

Pre-tax profit margin

61%

61%

49%

Market Making . . . . . . . . . . . . . Net revenues

Non-interest expenses

Income (loss) before income taxes

$

86
113

$ (27)

$ 190
146

$

44

$ 298
168

$ 130

Pre-tax profit (loss) margin

(31)%

23%

44%

Corporate(2) . . . . . . . . . . . . . . . Net revenues

Non-interest expenses
Income (loss) before income taxes

Total

. . . . . . . . . . . . . . . . . . . . Net revenues

Non-interest expenses

Income before income taxes

$ 211
(5)
$ 216

$1,702
653

$1,049

$ (33)
6
$ (39)

$1,396
635

$ 761

$ (206)
2
$ (208)

$1,189
731

$ 458

Pre-tax profit margin

62%

55%

39%

(1) Electronic brokerage non-interest expenses include an  unusual loss of  $137 million in 2015.  See

‘‘Management’s Discussion and Analysis of Financial  Condition and Results of Operations’’  in
Part II Item 7 of this Annual Report on Form 10-K.

(2) The corporate segment includes corporate  related activities, inter-segment  eliminations and net

gains and losses on positions held as  part of our overall currency  diversification strategy. Corporate
net revenues include a $93 million gain from the remeasurement of our Tax  Receivable  Agreement
liability as a result of the enactment of the  Tax Cuts and Jobs Act. See ‘‘Management’s Discussion
and Analysis of Financial Condition and Results of  Operations’’ in  Part II Item 7 and  Note 4  and
to the audited consolidated financial statements in Part  II, Item 8 of this Annual Report on
Form 10-K.

Financial information concerning our  business  segments for each of 2017,  2016, and  2015 is  set forth in
‘‘Management’s Discussion and Analysis of Financial  Condition and Results of Operations,’’  and the
audited consolidated financial statements and the notes thereto, which  are in  Part II,  Items 7 and 8  of
this  Annual Report on Form 10-K.

Electronic Brokerage—Interactive Brokers

Electronic brokerage represented 94% of net revenues and 103% of income before income taxes from
electronic brokerage and market making combined during  2017. We conduct our electronic brokerage
business through our Interactive Brokers  (‘‘IB’’) subsidiaries. As an electronic broker, we execute, clear
and settle trades globally for both institutional and individual customers.  Capitalizing  on our
proprietary technology originally developed for our market making  business,  our systems provide our
customers with the capability to monitor multiple markets around the world simultaneously and  to
execute trades electronically in these  markets at  a low cost in multiple  products and currencies from  a
single trading account.

Since launching this business in 1993, we have grown to approximately 483  thousand  institutional and
individual brokerage customers. We provide  our  customers with what  we believe to be one  of  the most

6

effective and  efficient electronic brokerage platforms in the  industry.  The  following  are key highlights
of our electronic brokerage business:

(cid:127) Low  Costs—We provide our customers with among the industry’s  lowest overall transaction  costs
in two ways. First, we offer among the  lowest execution, commission  and financing  costs in  the
industry. Second, our customers benefit from our advanced routing  of orders designed to achieve
the best available trade price. In order to illustrate this advantage, we publish  monthly  brokerage
metrics including our customers’ average net trade cost for Reg.-NMS stocks. In 2017,
customers’ total all-in cost of executing  and clearing U.S. Reg.-NMS stocks through IB, including
brokerage commissions, regulatory and  exchange fees and market impact, was 1.3 basis points of
trade money, as measured against a daily  volume-weighted average price (‘‘VWAP’’) benchmark.

(cid:127) Automated Risk Controls—Throughout the trading day, we calculate  margin requirements  for
each  of our customers on a real-time basis  across all  product classes (stocks, options, futures,
bonds, forex and mutual funds) and across  all currencies. Our customers are alerted to
approaching margin violations and if a customer’s  equity falls below what is required to support
that customer’s margin, we attempt to  automatically liquidate positions on a real-time basis to
bring the customer’s account into margin compliance. This is done to protect IB, as  well as the
customer, from excessive losses.

(cid:127) IB Universal AccountSM—From a single point of entry in one IB Universal AccountSM our

customers are able to transact in 23 currencies, across multiple classes  of  tradable,  primarily
exchange-listed products, including stocks,  options, futures,  bonds, forex and mutual funds  traded
on more than 120 exchanges and market centers in 26  countries around the world seamlessly.

(cid:127) IB SmartRoutingSM—Our customers  benefit from our advanced  order routing technology. IB
SmartRoutingSM retains control of  the customer’s order, continuously searches  for the  best
available price and, unlike most other routers, dynamically routes and re-routes all or parts of a
customer’s order to achieve optimal execution  and among the  lowest execution and commission
costs in the industry. To highlight the quality of our  price executions,  we publish  on our website
independent measurements performed  by a third party provider of transaction  analysis to
illustrate IB’s net price improvement versus the  industry.  We also offer Transaction Cost Analysis
reporting to allow  customers to track execution performance by criteria including trade date,
trade price, underlying security and exchange.

(cid:127) Flexible and Customizable System—Our platform is designed to provide an efficient customer

experience, beginning with a highly automated account opening  process and ending with a fast
trade execution, with real-time position monitoring. Our sophisticated interface provides
interactive real-time views of account  balances,  positions, profits  or  losses, buying  power  and
‘‘what-if’’ scenarios to enable our customers to more easily make informed  investment decisions
and trade efficiently. Our system is configured to remember  the user’s preferences  and is
specifically designed for multi-screen systems. When away from their main workstations,
customers are able to access their accounts  through our IB  WebTraderSM or MobileTraderSM
interfaces.

(cid:127) Interactive AnalyticsSM and IB Option AnalyticsSM—We offer our customers state-of-the-art tools,

which  include a customizable trading platform,  advanced analytic tools and over 60  sophisticated
order types and algorithms. We also provide a  real-time option analytics window which displays
values that reflect the rate of change of an option’s price  with  respect to a unit change  in each
of a number of risk dimensions.

7

(cid:127) Probability Lab(cid:3) (Patent Pending)—The Probability Lab provides customers with an intuitive,
visual method to analyze market participants’ future stock price  forecasts  based on current
option prices. This tool compares a customer’s  stock price forecast versus  that  of the market,
and scans the entire option universe for the highest Sharpe ratio multi-leg option strategies that
take advantage of the customer’s forecast.

(cid:127) IB Risk NavigatorSM—We offer free  to all customers our real-time market risk management
platform that unifies exposure across  multiple  asset  classes around the globe. The system  is
capable  of identifying overexposure to  risk  by starting at  the portfolio  level and drilling down
into successively greater detail within multiple report views.  Report  data is updated  every  ten
seconds or upon changes to portfolio composition. Predefined  reports allow the  summarization
of a portfolio from different risk perspectives, and allow views  of Exposure, Value  at Risk
(‘‘VaR’’), Delta, Gamma, Vega and Theta, profit and loss and position quantity measures  for the
different portfolio views. The system also offers the customer the ability  to  modify positions
through ‘‘what-if’’ scenarios that show hypothetical changes to the  risk  summary.

(cid:127) White Branding—Our large financial advisor and broker-dealer  customers may ‘‘white  brand’’ our

trading interface, account management and reports with their firm’s  identity. Broker-dealer
customers can also select from among our  modular functionalities, such as order  routing, trade
reporting or clearing, on specific products or exchanges where they may not have up-to-date
technology, in order to offer to their customers a complete global range  of services and
products.

(cid:127) Securities Financing Services—We offer a suite of automated Stock Borrow and Lending tools,

including our depth of availability, transparent rates, global reach  and dedicated service
representatives. Our Stock Yield Enhancement Program  allows our  customers  to  lend their
fully-paid stock shares to us in exchange for cash  collateral. In  turn, we lend  these  stocks in
exchange for collateral and earn stock lending fees. We pay our customers a rebate  on the cash
collateral generally equal to 50% of the  income we earn from lending the  shares. This allows
customers holding fully-paid long stock positions to enhance their returns.

(cid:127) Investors’ Marketplace—The Investors’ Marketplace is an expansion of our  Money Manager
Marketplace and our Hedge Fund Capital  Introduction program. This  program is  the first
electronic meeting place that brings together individual investors, financial advisors, money
managers, fund managers, research analysts, technology providers, business developers and
administrators, allowing them to interact to form connections and conduct business.

(cid:127) Trade Desk—We offer broker-assisted trading through our block  trade desk,  which is ideal  when
customers are away from their computer, or if they  just want  another  set of eyes watching their
orders and updating them on market changes.

(cid:127) Model Portfolios—Model Portfolios offer advisors an efficient and time-saving approach  to

investing customer assets. They allow advisors to create  groupings of financial instruments based
on specific investment themes, and then invest  customer  funds into these  models.

(cid:127) Portfolio Builder—Portfolio Builder allows our customers to set up an investment strategy based

on research and rankings from top buy-side  providers  and  fundamental data; use filters to define
the universe of equities that will comprise their strategy and  back-test their strategy  using  up to
three years of historical performance; work in  hypothetical mode to adjust the  strategy until  the
historical performance meets their standards; and  with the  click of a button let  the system create
the orders to invest in a strategy and track its performance in  their portfolio.

8

(cid:127) Greenwich Compliance—Greenwich Advisor Compliance Services  (‘‘Greenwich  Compliance’’)
offers direct expert registration and start-up  compliance services, as well as answers to basic
day-to-day compliance questions for experienced investors and traders looking to start their own
investment advisor firms. Greenwich Compliance professionals  have regulatory  and industry
experience, and can help investment  advisors trading on the  IB platform meet  their  registration
and  compliance needs.

(cid:127) IB  Asset Management—IB Asset Management (formerly known  as Covestor) recruits  registered
financial advisors, vets them, analyzes their investment  track records, and groups them  by  their
risk profile. Retail  investors who are interested in  having  their individual accounts robo-traded
are grouped by their risk and return preferences. Retail investors can  assign their accounts to be
traded by one or more advisors. IB  Asset  Management also offers to IB customers Smart Beta
Portfolios which combine the benefits of actively managed  fund stock selection techniques with
passive ETF low cost automation to  provide broad market exposure  and potentially  higher
returns.

(cid:127) Interactive Brokers Debit Mastercard(cid:3)—Interactive Brokers Debit Mastercard(cid:3) allows customers
to spend and borrow directly against their account  at lower rates  than credit cards, personal
loans and home equity lines of credit,  with no monthly  minimum payments  and no late fees.
Customers can use their card to make  purchases and ATM withdrawals  anywhere Debit
Mastercard(cid:3) is accepted around the world.

(cid:127) Insured Bank Deposit Sweep Program—Our Insured Bank Deposit Sweep Program  provides

eligible IB customers with up to $2,500,000 of  Federal  Deposit Insurance Corporation (‘‘FDIC’’)
insurance on their eligible cash balances in addition  to  the existing $250,000 Securities Investor
Protection Corporation (‘‘SIPC’’) coverage for total coverage of $2,750,000. Customers continue
earning the same competitive interest rates currently  applied to cash  held in IB accounts. IB
sweeps each participating customer’s eligible  credit balances daily  to  one or more banks, up to
$246,500 per bank, allowing for the accrual of interest  and  keeping within  the FDIC  protected
threshold. Cash balances above $2,750,000 remain subject to safeguarding under the SEC’s
Customer Protection Rule 15c3-3.

We  are able to provide our customers with high-speed  trade execution at low commission rates, in large
part because of our proprietary technology. As a result of our advanced  electronic  brokerage platform,
we attract sophisticated and active investors. No  single customer represented more  than 1.5%  of our
commissions in 2017.

Market Making—Timber Hill

Market making represented 6% of net  revenues from electronic brokerage and  market making
combined during 2017. We conduct our market making business primarily  through our Timber Hill
(‘‘TH’’) subsidiaries. On March 8, 2017 we announced our  intention to discontinue  our options market
making activities globally, and we are  currently in  the process  of winding down these operations.
Additionally, as previously announced, we  entered into a definitive transaction to transfer our U.S.
options market making operations to Two  Sigma Securities, LLC. This  transaction closed on
September 29, 2017. We intend to continue conducting  certain proprietary trading activities  in stocks
and related instruments to facilitate our electronic  brokerage customers’ trading in products  such as
ETFs,  ADRs, CFDs and other financial instruments. However,  we do not expect this activity to be of
sufficient size as to require reporting  these activities as a  separate  operating segment  after we
discontinue our options market making  activities.

As a market maker, we provide liquidity  by offering competitively tight  bid/offer spreads over a broad
base of tradable, exchange-listed products, including equity derivative products, equity index derivative
products, equity securities and futures.  As  principal, we commit  our own capital and derive revenues  or

9

incur losses from the difference between the  price paid when securities  are bought  and the  price
received when those securities are sold.  Historically,  our  profits have  been principally  a function of
transaction volume and price volatility  of electronic exchange-traded products rather than the direction
of price movements. Other factors, including the ratio of actual to implied volatility and  shifts in
foreign currency exchange rates, can also  have a  meaningful impact on  our  results, as  described further
in ‘‘Business Environment’’ in Part II,  Item  7 of this Annual Report  on  Form 10-K.

Our strategy is to calculate quotes at which supply and demand  for a  particular  security are  likely to be
in balance a few seconds ahead of the market and execute small trades  at tiny but favorable
differentials. Because we provide continuous bid  and offer quotations and we are continuously  both
buying and selling quoted securities, we  may  have either  a long or a short  position  in a particular
product  at a given point in time. As a  matter of practice, we will generally not take portfolio positions
in either the broad market or the financial instruments of specific  issuers in  anticipation  that  prices will
either rise or fall. Our entire portfolio is evaluated many times  per  second and continuously  rebalanced
throughout the trading day, thus minimizing the risk of our portfolio at all times. This  real-time
rebalancing of our portfolio, together  with our real-time  proprietary risk management system, enables
us to curtail risk and trade efficiently. Our quotes are  based on our proprietary model rather than
customer order flow.

As of December 31, 2017, we continue to conduct market making operations in Canada through our
subsidiary, Timber Hill Canada Company (‘‘THC’’) at the Toronto Stock  Exchange and  Canadian
Derivatives Exchange Bourse de Montreal Inc.; in India through our  subsidiary, Interactive Brokers
(India) Private Limited (‘‘IBI’’), which  is  a member of the National Stock  Exchange of India Ltd. and
the Bombay Stock Exchange; and in Hong Kong through our subsidiary, Interactive Brokers
Hong Kong Limited, a member of the cash and derivatives markets of the  Hong Kong Exchange. All
other options market making operations we previously conducted were discontinued during 2017. We
expect to continue assessing whether and when to discontinue the remaining operations.

Most of the above trading activities take place on exchanges,  and all securities  and commodities that
we trade are cleared by exchange owned or authorized clearing houses.

Technology

Our proprietary technology is the key  to  our success. We believe that integrating  our  system with
electronic exchanges and market centers  results in transparency, liquidity and efficiencies of scale.
Together with the IB SmartRoutingSM system and our low commissions, this approach  reduces overall
transaction costs to our customers and,  in  turn, increases our transaction  volume and profits. Over the
past 40 years, we have developed an integrated trading system  and communications network  and have
positioned our company as an efficient  conduit for the global flow of risk  capital across  asset and
product  classes on electronic exchanges around  the world, permitting  us to have one of the  lowest cost
structures in the industry. We believe that developing, maintaining and continuing to enhance our
proprietary technology provides us and  our customers with the  competitive advantage  of being able  to
adapt quickly to the changing environment of  our industry and to take advantage of opportunities
presented by new exchanges, products  or  regulatory changes before our competitors.

Our proprietary technology infrastructure  enables us to provide our customers with  the ability to
execute trades at among the lowest commission costs in the industry. Customer trades are  both
automatically captured and reported  in real time  in our system. Our  customers  trade on  more than 120
exchanges and market centers in 26 countries around the world.  These exchanges and market  centers
are all partially or fully electronic, meaning  that a customer can buy  or sell a product  traded on that
exchange via an electronic link from  his  or her computer  terminal  through our system  to  the exchange.
We  offer our products and services through a global  communications network that is designed to
provide secure, reliable and timely access  to the  most current  market  information.  We provide our
customers with a variety of means to connect to our brokerage systems, including dedicated
point-to-point data lines, virtual private  networks and the Internet.

10

Specifically, our customers receive worldwide electronic  access connectivity through our Trader
Workstation (our real-time Java-based trading  platform), our proprietary Application Programming
Interface (‘‘API’’), and/or industry standard  Financial Information Exchange (‘‘FIX’’)  connectivity.
Customers who want a professional quality trading application with a sophisticated  user interface utilize
our  Trader Workstation, which can be accessed through a desktop or variety of mobile devices.
Customers interested in developing program trading applications in MS-Excel, Java, Visual Basic  or
C++ utilize our API. Large institutions with FIX  infrastructure prefer to use our  FIX solution  for
seamless integration of their existing order  gathering  and  reporting applications.

While many brokerages, including some  online brokerages,  rely on manual  procedures  to  execute many
day-to-day functions, we employ proprietary technology  to  automate,  or  otherwise facilitate,  many of
the following functions:

(cid:127) account opening process;

(cid:127) order routing and best execution;

(cid:127) seamless trading across all types of  securities and currencies around the world from one  account;

(cid:127) order types and analytical tools offered  to  customers;

(cid:127) delivery of customer information, such as confirmations, customizable  real-time account

statements and audit trails;

(cid:127) customer service; and

(cid:127) risk management through automated  real-time credit  management of all  new orders and margin

monitoring.

Research and Development

One  of our core strengths is our expertise  in the rapid development and deployment of automated
technology for the financial markets. Our  core software technology  is developed internally, and  we do
not generally rely on outside vendors for software development  or maintenance. To achieve optimal
performance from our systems, we are  continuously  rewriting and  upgrading our software.  Use  of  the
best available technology not only improves our performance  but also  helps us attract and retain
talented developers. Our software development  costs are  low  because  the  employees who  oversee the
development of the software are often  the same employees who design the  application,  evaluate its
performance, and participate along with our quality assurance  professionals  in our robust quality
assurance testing procedures. The involvement  of  our  developers  in each  of  these  processes enables us
to add  features and further refine our  software rapidly.

Our internally-developed, fully integrated trading and risk management systems are unique and transact
across all product classes on more than  120 electronic exchanges and market centers and in
23 currencies around the world. These systems have  the flexibility to assimilate  new exchanges and new
product  classes without compromising transaction speed  or fault  tolerance. Fault tolerance,  or the
ability to maintain system performance  despite  exchange  malfunctions or hardware failures,  is crucial to
ensuring best executions for our customers. Our systems are  designed to detect exchange malfunctions
and quickly take corrective actions by re-routing pending orders.

Our company is technology-focused,  and  our management team is hands-on and technology-savvy. Most
members of the management team write  detailed program specifications for  new applications. The
development queue is prioritized and  highly  disciplined. Progress on programming  initiatives is
generally tracked on a bi-weekly basis  by  a steering committee consisting of  senior executives. This
enables us to prioritize key initiatives and achieve rapid results. All new business  starts  as a software
development project. We generally do  not engage in any business  that we cannot  automate and
incorporate into our platform prior to  entering  into  the business.

11

The rapid software development and  deployment cycle is achieved by our ability to leverage a highly
integrated, object-oriented development environment. The software  code is modular, with each  object
providing a specific function and being reusable in multiple  applications. New software releases are
tracked and tested with proprietary automated testing  tools.  We are not  hindered  by  disparate and
often limiting legacy systems assembled  through acquisitions. Virtually all of our software has been
developed and maintained with a unified  purpose.

For over 40 years, we have built and  continuously refined our automated and integrated, real-time
systems for world-wide trading, risk management, clearing  and cash management, among others. We
have also assembled a proprietary connectivity network between us  and exchanges around the world.
Efficiency and speed in performing prescribed functions are always crucial requirements for our
systems. As a result, our trading systems  are able to assimilate  market  data, recalculate  and distribute
streaming quotes for tradable products in  all product classes many times per second.

Risk Management Activities

The core of our risk management philosophy  is the utilization of our fully integrated computer systems
to perform critical, risk-management  activities  on a  real-time basis. In  our  market making business, our
real-time integrated risk management  system  seeks to ensure  that our  overall  positions  are continuously
hedged at all times, curtailing risk. In our electronic  brokerage business, integrated risk management
seeks to ensure that each customer’s  positions  are continuously credit checked and brought into
compliance if equity falls short of margin  requirements, curtailing  bad  debt losses.

We  actively manage our global currency  exposure  on a  continuous basis by maintaining our equity in  a
basket of currencies we call the GLOBAL.  We  define the GLOBAL  as consisting  of fractions of a
U.S. dollar, Euro, Japanese yen, British  pound,  Hong  Kong  dollar, Canadian dollar, Indian  rupee,
Swiss franc, Chinese renminbi, Australian  dollar, Mexican peso, Swedish  krona, Norwegian krone, and
Danish  krone. We currently transact  business and are  required to manage  balances in each of these
14 currencies. The currencies comprising the  GLOBAL and their relative  proportions can change over
time. For example, in light of our decision to wind down our options market  making activities  globally,
we removed the Singapore dollar (SGD) and realigned the relative weight of the  U.S. dollar  (USD)
versus the other currency components to better reflect  our businesses  going  forward. The new
composition went into effect as of the close of  business on March  31, 2017. Additional information
regarding our currency diversification strategy is set forth in  ‘‘Quantitative  and Qualitative Disclosures
about Market Risk’’ in Part II, Item 7A  of this Annual Report  on Form 10-K.

Electronic Brokerage

We  calculate margin requirements for  each of our  customers on a real-time  basis across all product
classes (stocks, options, futures, forex,  bonds and mutual funds) and  across all currencies. Recognizing
that our customers are experienced investors, we expect  our customers  to manage  their positions
proactively and we provide tools to facilitate  our  customers’ position management.  However, if a
customer’s equity falls below what is required to support that customer’s margin, we will automatically
liquidate positions on a real-time basis  to  bring the customer’s account into margin  compliance. We do
this  to protect us,  as well as the customer, from  excessive  losses. These systems further  contribute to
our  low-cost structure. The entire credit  management process is completely automated.

As a safeguard, all liquidations are displayed on custom  built liquidation monitoring screens that are
part of the toolset our technical staff  uses to monitor  performance  of our  systems at all times the
markets around the world are open.  In  the event our systems absorb erroneous market data from
exchanges, which prompts liquidations,  risk specialists on  our technical staff have the  capability  to  halt
liquidations that meet specific criteria.  The  liquidation  halt function  is highly restricted.

12

Our customer interface includes color coding on  the account screen  and pop-up warning  messages  to
notify customers that they are approaching their margin  limits. This feature allows customers to take
action, such as entering margin reducing trades, to avoid  having  us liquidate their  positions.  These tools
and real-time margining allow our customers to understand  their  trading risk at  any moment of the day
and help us maintain low commissions.

Market Making

We  employ certain hedging and risk management techniques to protect us from  a severe market
dislocation. Our risk management policies are developed and implemented  by  our  Chairman and our
steering committee, which is comprised  of  senior executives of our various companies. Our strategy is
to calculate quotes a few seconds ahead of the market and execute small trades at a tiny  but favorable
differential as a result. This strategy  is  made possible by our proprietary  pricing model, which evaluates
and monitors the risks inherent in our portfolio, assimilates market data  and  reevaluates the
outstanding quotes in our portfolio many  times  per  second. Our model  automatically rebalances our
positions throughout each trading day to manage risk exposures both on our  options  and futures
positions and the underlying securities,  and it  will  price the increased risk that a position would add  to
the overall portfolio into the bid and  offer prices we post. Under  risk  management policies
implemented and monitored primarily  through our computer systems, reports  to  management, including
risk profiles, profit and loss analysis and trading  performance, are prepared on  a real-time basis as well
as daily and periodical bases. Although our market making is completely  automated, the trading
process and our risk are monitored by  a  team  of individuals who,  in real-time,  observe  various risk
parameters of our consolidated positions.  Our assets and liabilities are marked-to-market  daily  for
financial reporting purposes and re-valued continuously  throughout the  trading day  for risk
management and asset/liability management purposes.

Operational Controls

We  have automated the full cycle of controls  surrounding our  businesses. Key automated  controls
include the following:

(cid:127) Our technical operations team continuously monitors  our network and the proper  functioning of
each  of our nodes  (exchanges and market centers, internet service  providers (‘‘ISPs’’), leased
customer lines and our own data centers) around the  world.

(cid:127) Our real-time credit manager software provides pre and post-execution controls by:

(cid:127) testing every customer order to ensure that the customer’s account holds  enough equity  to
support the execution of the order, rejecting  the order if equity is insufficient or directing
the order to an execution destination  without  delay if equity is sufficient;  and

(cid:127) continuously updating a customer account’s equity and margin requirements and,  if the
account’s equity falls below its minimum margin  requirements, automatically issuing
liquidating orders in a smart sequence  designed to minimize the impact on the  account’s
equity.

(cid:127) Our market making system continuously evaluates securities and futures products in which we
provide bid and offer quotes and changes  our  bids  and  offers in such a way as  to  maintain  an
overall hedge and  a low-risk profile.  The  speed of communicating with exchanges and  market
centers is maximized through continuous software and network  engineering maintenance,
thereby allowing us to achieve real-time controls  over market exposure.

(cid:127) Our clearing system captures trades in real-time and performs automated reconciliation of trades
and positions, corporate action processing, customer account transfer, options exercise, securities
lending and inventory management, allowing  us to effectively manage operational risk.

13

(cid:127) Our accounting system operates with  automated data feeds from clearing  and banking systems,

allowing us to produce financial statements for  all  parts of our  business every day  by  mid-day  on
the day  following trade date.

(cid:127) Software developed to interface with the  accounting and market making systems performs daily

profit and loss reconciliations, which provide tight financial controls over market  making
functions.

Transaction Processing

Our transaction processing is automated over  the full life  cycle of  a trade. Our fully  automated smart
router  system searches for the best possible combination  of prices available at the time a customer
order is placed and immediately seeks  to  execute  that order  electronically or send it  where the  order
has the highest possibility of execution  at the best price. Our market making software  generates and
disseminates to exchanges and market  centers continuous bid and offer  quotes on  tradable,
exchange-listed products.

At the moment a trade is executed, our systems  capture and  deliver this information back to the
source, either to the customer via the  brokerage system or  the market making system,  in most  cases
within a fraction of a second. Simultaneously,  the trade record is  written into our clearing  system,
where  it flows through a chain of control  accounts  that allow us to reconcile trades, positions and
money until the final settlement occurs.  Our integrated software  tracks other important activities,  such
as dividends, corporate actions, options  exercises, securities lending, margining, risk management  and
funds  receipt and disbursement.

IB SmartRoutingSM

IB SmartRoutingSM searches for the best destination price in view  of  the displayed  prices, sizes and
accumulated statistical information about the behavior  of  market  centers  at the time an order is placed,
and IB SmartRoutingSM immediately seeks to execute that order electronically.  Unlike other smart
routers, IB SmartRoutingSM never relinquishes control of the order,  and  constantly searches  for the  best
price. It continuously evaluates fast-changing  market  conditions  and dynamically re-routes  all  or parts
of the order seeking to achieve optimal  execution. IB SmartRoutingSM represents each leg of a spread
order independently and enters each  leg  at the  best possible venue. IB SmartRouting AutorecoverySM
re-routes a customer’s U.S. options order  in the  case of an exchange malfunction, and we undertake
the risk of double executions. In addition,  IB SmartRoutingSM checks each new order to see if it could
be executed against any of its pending orders. As the  system gains  more users, this feature becomes
more important for customers in a world  of multiple exchanges,  market  centers and penny priced
orders because it increases the possibility of best executions for our customers ahead of  customers of
other brokers. As a result of this feature,  our customers have a greater  chance of executing limit orders
and can do so sooner than those who  use other routers.

Clearing and Margining

Our activities in the U.S. are entirely  self-cleared. We are a clearing  member  of OCC (the Options
Clearing Corporation), the Chicago Mercantile Exchange Clearing  House (‘‘CMECH’’),  The Depository
Trust & Clearing Corporation and ICE Clear U.S.

In addition, we are fully or partially self-cleared in Canada, the United  Kingdom, Switzerland, France,
Germany, Belgium, Austria, the Netherlands, Norway, Sweden, Denmark, Finland, India, Hong Kong,
and Australia.

14

Customers

We  established our electronic brokerage  subsidiary, Interactive Brokers  LLC (‘‘IB LLC’’), in  1993 to
enhance the use of our global network of trading interfaces, exchange  and  clearinghouse  memberships,
and regulatory registrations assembled  over the prior  17 years to serve our  market  making business. We
realized that electronic access to market centers  worldwide through our network  could  easily be utilized
by the very same floor traders and trading desk professionals who, in the  coming years, would be
displaced by the conversion of exchanges from open  outcry  to  electronic systems.

We  currently service approximately 483  thousand cleared customer accounts. Our  customers  reside in
over 200 countries and territories around  the  world. Our  target customer  is one that requires  the latest
in trading technology, worldwide access and expects low overall transaction costs. Our  customers  are
mainly comprised of ‘‘self-service’’ individuals,  former floor traders, trading desk professionals,
electronic retail brokers, hedge funds,  financial advisors  who are comfortable with  technology, as  well
as introducing brokers and banks that  require global access.

Our customers primarily fall into two groups based on services provided: cleared customers  and
non-cleared customers, the latter also known as  trade execution customers. By  offering portfolio
margining and other institutional services,  we have  been able to persuade  many of our trade execution
hedge fund customers to utilize our cleared business solution, which benefits the  hedge funds  in terms
of cost savings. Prime brokers may offer  increased leverage over  Regulation T credit  limitations and the
Financial Industry Regulatory Authority (‘‘FINRA’’) margin requirements through offshore entities and
joint back office arrangements. Through portfolio  margining, we are able to offer  similar leverage with
lower margin requirements that reflect the  reduced risk of a hedged portfolio.

(cid:127) Cleared Customers: We provide trade execution  and clearing services to our cleared customers
who are generally attracted to our low commissions,  low financing rates, high  interest paid  and
best price execution. From small market making groups and individual market makers, our
cleared customer base has expanded over the  years  to  include  institutional and individual traders
and investors, financial advisors and  introducing  brokers.

(cid:127) Trade Execution Customers: We offer trade  execution  for  customers who choose  to  clear with
another prime broker or a custodian  bank; these customers  are  able to take advantage of our
low commissions for trade execution  as well  as our best price  execution.

Our non-cleared customers include online  brokers and the  customer trading units  of  commercial banks.
These customers are attracted by our IB SmartRoutingSM technology as well as our direct access to
stock, options, futures, forex and bond  markets  worldwide.

Our customers receive worldwide electronic  access connectivity in one of  three ways: the  Trader
Workstation via desktop or mobile device, our  proprietary API, and/or industry standard FIX
connectivity.

Employees and Culture

We  take pride in our technology-focused  company culture and embrace it as one of our fundamental
strengths. We remain committed to improving  our technology and  we try to minimize corporate
hierarchy to facilitate efficient communication among employees. We have assembled what we believe is
a highly talented group of employees.  As we grow, we expect to continue to provide significant rewards
for our  employees who provide substantial  value to us and the world’s financial markets.

As of December 31, 2017, we had 1,228  employees,  of  which 1,213 own  shares of the  Company either
vested, unvested or both, all of whom  were employed  on a full-time basis. None of our employees are
covered by collective bargaining agreements. We believe that our  relations with our employees are
good.

15

Competition

Electronic Brokerage

The market for electronic brokerage  services  is rapidly evolving and highly competitive. We believe that
we fit neither within the definition of a  traditional  broker nor that of a traditional prime broker.  Our
primary competitors include the prime  brokerage  and electronic  brokerage arms of major commercial
and investment banks and brokers, such as Goldman Sachs,  Morgan  Stanley  and JP Morgan; and
offerings to target professional traders by large retail online brokers. We also encounter competition to
a lesser extent from full commission brokerage firms, including Merrill Lynch and  Morgan Stanley, as
well as other financial institutions, most  of which  provide online brokerage  services.  The electronic
brokerage businesses of many of our competitors  are relatively insignificant in the  totality  of  their
firms’ business.

Market Making

The competitive environment for market makers  has evolved considerably in  the past several years,
most notably with  the rise in high frequency traders (‘‘HFTs’’), which transact significant trading  volume
on electronic exchanges by using complex  algorithms and high-speed execution software  that  analyzes
market conditions. HFTs that are not  registered market makers  operate with fewer regulatory
restrictions and are able to move more quickly and trade more  cheaply. This issue has been an area of
focus amongst regulators who examine  the practices of HFTs and their impact on  market structure.

As previously described we are in the process of discontinuing our options  market making activities
globally.

Regulation

Our securities and derivatives businesses  are  extensively regulated by U.S. federal  and state regulators,
foreign regulatory  agencies, numerous  exchanges and  self-regulatory organizations  of which our
subsidiaries are members. In the current era of heightened  regulation of financial institutions, we
expect to incur increasing compliance  costs,  along with  the industry as a whole. Our approach has  been
to build many of our regulatory and compliance functions into our integrated market making,  order
routing and custodial systems.

Overview

As a registered U.S. broker-dealer, IB LLC and Timber Hill LLC  (‘‘TH LLC’’) are subject to the rules
and regulations of the Exchange Act, and  as members of various exchanges, we  are also subject to such
exchanges’ rules and requirements. Additionally,  IB LLC is subject to the Commodity Exchange Act
and rules promulgated by the Commodity Futures  Trading  Commission (‘‘CFTC’’) and the various
commodity exchanges of which it is a  member.  We are also subject to the requirements  of  various
self-regulatory organizations such as  FINRA and  the National Futures Association  (‘‘NFA’’). Our
foreign affiliates are similarly regulated  under the laws  and institutional framework of the  countries in
which  they operate.

U.S. broker-dealers and futures commission merchants are subject  to  laws, rules and regulations that
cover all aspects of the securities and derivatives business, including:

(cid:127) sales methods;

(cid:127) trade practices;

(cid:127) use and safekeeping of customers’ funds  and  securities;

16

(cid:127) capital structure;

(cid:127) risk management;

(cid:127) record-keeping;

(cid:127) financing of customers’ purchases;  and

(cid:127) conduct of directors, officers and employees.

In addition, the businesses that we may conduct are  limited by our  agreements with and our oversight
by regulators. Participation in new business  lines,  including trading of  new products or participation on
new exchanges or in new countries often  requires governmental and/or  exchange approvals, which may
take significant time and resources. As a  result, we may be prevented from entering new businesses
that may be profitable in a timely manner,  or at  all.

As certain of our subsidiaries are members of FINRA, we  are subject to certain  regulations regarding
changes in control of our ownership. FINRA  Rule 1017  generally provides that FINRA approval must
be obtained in connection with any transaction resulting in a change in control of  a member firm.
FINRA defines control as ownership of  25% or more of  the firm’s equity by a single entity or  person
and would include a change in control of a parent company. As a result of these  regulations, our future
efforts to sell shares or raise additional capital may be delayed or prohibited  by  FINRA.

Net Capital Rule

The SEC, FINRA, CFTC and various  other  regulatory  agencies within the U.S. have stringent rules
and regulations with respect to the maintenance of specific  levels of net capital by regulated entities.
Generally, a broker-dealer’s capital is  net worth plus qualified subordinated debt less deductions  for
certain types of assets. The Net Capital  Rule requires that  at least a minimum part  of a broker-dealer’s
assets be maintained in a relatively liquid  form.

If these net capital rules are changed  or  expanded, or if there is an unusually  large charge  against our
net capital, our operations that require the  intensive use of capital would  be  limited.  A large operating
loss or charge against our net capital could  adversely affect our  ability  to  expand  or even  maintain
these current levels of business, which  could  have a material  adverse effect  on our business and
financial condition.

The U.S. regulators impose rules that  require  notification when net capital falls below certain
predefined criteria. These rules also dictate  the ratio  of debt-to-equity  in the regulatory capital
composition of a broker-dealer, and constrain the ability of  a  broker-dealer  to  expand its business
under certain circumstances. If a firm  fails to maintain  the required  net capital, it may be subject to
suspension or revocation of registration by the  applicable regulatory agency, and  suspension or
expulsion by these regulators could ultimately lead to the firm’s liquidation. Additionally, the Net
Capital Rule and certain FINRA rules impose requirements that may have the  effect  of prohibiting a
broker-dealer from distributing or withdrawing  capital and requiring prior notice  to  U.S. regulators  and
approval from FINRA for certain capital  withdrawals.

As of December 31, 2017, aggregate  excess regulatory capital for all of the  operating companies  was
$4.5 billion.

IB LLC and TH LLC are subject to the  Uniform Net Capital  Rule (Rule 15c3-1) under  the Exchange
Act and IB LLC to the CFTC’s minimum financial  requirements (Regulation 1.17) under  the
Commodities Exchange Act; and THE is  subject to the Swiss  Financial  Market Supervisory Authority
eligible equity requirement. Additionally,  Interactive Brokers  Hong Kong Limited (‘‘IBHK’’)  is subject
to the Hong Kong Securities and Futures Commission financial resource  requirement;  Interactive
Brokers Australia Pty Limited (‘‘IBA’’)  is  subject  to  the Australian  Securities  Exchange liquid capital

17

requirement;  Timber Hill (Lichtenstein)  AG is subject to the  Financial  Market Authority Liechtenstein
eligible capital requirements; Timber Hill  Canada Company (‘‘THC’’)  and Interactive Brokers
Canada Inc. (‘‘IBC’’) are subject to the Investment Industry  Regulatory Organization of Canada risk
adjusted capital requirement; Interactive Brokers (U.K.)  Limited (‘‘IBUK’’) is subject to the U.K.
Financial Conduct Authority financial  resources requirement; Interactive Brokers  (India) Private
Limited (‘‘IBI’’) is subject to the National Stock Exchange of India net capital ‘‘requirements; and
Interactive Brokers Securities Japan,  Inc.  (‘‘IBSJ’’) is subject to the Japanese Financial Supervisory
Agency capital requirements.

The following table summarizes capital,  capital requirements and excess regulatory capital:

IB LLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TH  LLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other regulated operating companies . . . . . . . . .

Net Capital/
Eligible Equity

Requirement

Excess

$3,548
279
614
773

$5,214

(in millions)
$495
1
92
121

$709

$3,053
278
522
652

$4,505

As of December 31, 2017, all of the operating companies  were  in compliance with their  respective
regulatory capital requirements. For additional  information regarding our net capital requirements
see Note 14 to the audited consolidated  financial statements in  Part II, Item 8 of this Annual  Report
on Form 10-K.

Protection of Customer Assets

To conduct customer activities, IB LLC  is  obligated under  rules  mandated by its primary regulators, the
SEC and the CFTC, to segregate cash or  qualified securities  belonging  to  customers.  In accordance
with the Securities Exchange Act of 1934, IB  LLC is required to maintain separate  bank  accounts for
the exclusive benefit of customers. In accordance  with the Commodity Exchange Act, IB LLC is
required to segregate all monies, securities  and property  received from commodities  customers in
specially designated accounts. IBC, IBUK,  IBHK, IBSJ, IBI and  IBA are subject to similar
requirements within their respective jurisdictions.

To further enhance the protection of  our customers’ assets, in 2011,  IB LLC sought  and received
approval from FINRA to perform the customer reserve computation on a daily basis, instead  of once
per  week. IB LLC has been performing  daily  computations since  December 2011,  along with  daily
adjustments of the money set aside in  safekeeping for our customers.

Supervision and Compliance

Our Compliance Department supports  and seeks to ensure proper operations of our market making
and electronic brokerage businesses. The philosophy of the  Compliance Department, and our company
as a whole, is to build automated systems  to  try  to  eliminate manual  steps in the compliance process
and then to augment these systems with experienced staff members  who apply their judgment where
needed. We have built automated systems  to handle  wide-ranging compliance  issues such as trade  and
audit trail reporting, financial operations reporting, enforcement of short sale  rules,  enforcement of
margin rules and pattern day trading  restrictions, review of employee correspondence, archival of
required records, execution quality and  order routing reports, approval and documentation of new
customer accounts, and anti-money laundering and anti-fraud  surveillance. In light of  our automated
operations and our automated compliance systems,  we have  a  smaller and more  efficient Compliance
Department than many traditional securities firms. Nonetheless, we have increased the staffing in our
Compliance Department over the past  several  years  to  meet the increased regulatory  burdens faced  by
all industry participants.

18

Our electronic brokerage and market  making companies have Chief Compliance Officers who report to
the Company’s CEO, General Counsel and its Audit  and  Compliance Committee. In the U.S., these
Chief Compliance Officers, plus certain  other senior staff members, are FINRA  and NFA registered
principals with supervisory responsibility over the various  aspects  of  our businesses. Similar roles are
undertaken by staff in certain non-U.S.  locations  as well. Staff  members  in the Compliance Department
and in other departments of the firm are also registered with  FINRA,  NFA or other regulatory
organizations.

Patriot Act and Increased Anti-Money  Laundering (‘‘AML’’) and ‘‘Know Your  Customer’’ Obligations

Registered broker-dealers traditionally  have  been subject  to  a  variety of rules that require that they
‘‘know their customers’’ and monitor  their  customers’  transactions for  potential suspicious activities.
With the passage of the Uniting and Strengthening America by  Providing Appropriate Tools Required
to Intercept and Obstruct Terrorism Act  of 2001  (the  ‘‘Patriot Act’’), broker-dealers are subject  to  even
more stringent requirements. Likewise, the SEC,  CFTC, foreign  regulators, and the various exchanges
and self-regulatory organizations, of which IB companies are  members, have passed numerous AML
and customer due  diligence rules. Significant criminal and civil penalties can be imposed  for violations
of the Patriot Act,  and significant fines  and regulatory  penalties can  also be imposed for  violations of
other governmental and self-regulatory organization AML rules.

As required by the Patriot Act and other rules, we  have established  comprehensive anti-money
laundering and customer identification procedures,  designated AML compliance  officers, trained our
employees and conducted independent  audits of our programs. Our anti-money laundering screening is
conducted using a mix of automated and manual reviews and has been  structured  to  comply with
regulations in various jurisdictions. We  collect required  information  through our new account  opening
process and screen accounts against databases for  the purposes of identity verification and for review of
negative information and appearance  on  government lists,  including the  Office of Foreign  Assets and
Control,  Specially Designated Nationals  and Blocked  Persons  lists. Additionally, we have developed
methods for risk control and continue to add upon specialized processes, queries  and automated
reports designed to identify money laundering, fraud and other suspicious activities.

Dodd-Frank Reform Act

The Dodd-Frank Wall Street Reform and Consumer Protection  Act  imposes  strict reporting and
disclosure requirements on the financial services  industry. We have enhanced  the evidence of our
supervisory review of controls over financial reporting and Management continues to monitor
accounting and regulatory rulemaking  developments for  their potential  effect on  our  financial
statements and internal controls over financial reporting.

Business Continuity Planning

Federal regulators and industry self-regulatory organizations have passed a series  of  rules in the past
several years requiring regulated firms  to  maintain business continuity plans that describe what actions
firms would take in the event of a disaster (such as  a fire, natural  disaster or terrorist incident) that
might significantly disrupt operations. We have  developed  business continuity plans that describe steps
that we and our employees would take  in  the event  of various  scenarios. We  have built a backup site
for certain key operations at our Chicago facilities that would  be  utilized in  the event of a significant
outage at our Greenwich headquarters.  In addition, we have strengthened the  infrastructure at our
Greenwich headquarters and have built redundancy of systems so that certain  operations  can be
handled from multiple offices. We continually evaluate opportunities  to  further our business continuity
planning efforts.

19

Foreign Regulation

Our international subsidiaries are subject to extensive regulation in the  various jurisdictions where they
have operations. The most significant  of  our international subsidiaries are: IBC and THC, registered to
do business in Canada as an investment  dealer and securities  dealer, respectively; IBUK, registered to
do business in the U.K. as a broker; THE, registered to do business in  Switzerland  as a securities
dealer; IBI, registered to do business  in  India as  a stock broker;  IBHK, registered to do business in
Hong Kong as a securities dealer; IBA,  registered to do business in  Australia as a  securities dealer  and
futures broker; and IBSJ, registered  in Japan as a  financial  instruments firm  with the Kanto Regional
Finance Bureau and the Financial Supervisory Agency.

In Canada, both THC and IBC are subject to the Investment Industry  Regulatory Organization of
Canada (‘‘IIROC’’) risk adjusted capital requirement. In the United Kingdom, IBUK is  subject to the
U.K Financial Conduct Authority financial resources requirement. In  Switzerland,  THE  is subject to
the Swiss Financial Market Supervisory Authority eligible  equity requirement.  In India,  IBI is subject to
the National Stock Exchange and Bombay Stock Exchange capital requirements. In Hong  Kong, the
Securities and Futures Commission (‘‘SFC’’)  regulates our  subsidiary, IBHK, as  a securities  dealer. The
compliance requirements of the SFC include, among other things, net capital  requirements and
stockholders’ equity requirements. The SFC regulates the activities of the officers,  directors, employees
and other persons affiliated with IBHK and requires the registration of  such persons. In Australia, IBA
is subject to the Australian Securities  Exchange liquid capital requirement. In Japan, IBSJ  is subject  to
the Financial Supervisory Agency, the  Osaka  Securities  Exchange and the Tokyo Stock  Exchange capital
requirements.

Executive Officers and Directors of Interactive Brokers Group,  Inc.

The following table sets forth the names,  ages and positions of our  current  directors and executive
officers:

Name

Age

Position

Thomas Peterffy . . . . . . . . . .
Earl H. Nemser . . . . . . . . . . .
Milan Galik . . . . . . . . . . . . . .
Paul J. Brody . . . . . . . . . . . . .
Thomas A. Frank . . . . . . . . . .
Lawrence E. Harris . . . . . . . .
Wayne Wagner . . . . . . . . . . . .
Richard Gates . . . . . . . . . . . .
Gary Katz . . . . . . . . . . . . . . .

73 Chairman of the Board of Directors and Chief Executive Officer
71 Vice Chairman and Director
President and Director
51
57 Chief Financial Officer, Treasurer, Secretary  and  Director
62 Executive Vice President and Chief Information Officer
61 Director
79 Director
46 Director
57 Director

Thomas Peterffy—Mr. Peterffy has been at the forefront of applying  computer technology to automate
trading and brokerage functions since he emigrated from Hungary  to  the United States in 1965.  In
1977, after purchasing a seat on the American Stock Exchange and trading  as an individual marker
maker in equity options, Mr. Peterffy was among the first  to apply a  computerized mathematical model
to continuously value equity option prices. By 1986, Mr. Peterffy developed and employed a  fully
integrated, automated market making system for  stocks,  options and futures. As  this  pioneering system
extended around the globe, online brokerage functions were  added and, in 1993,  Interactive  Brokers
was formed.

Earl H. Nemser—Mr. Nemser has been our Vice Chairman since November 2006. Mr. Nemser has been
the Vice Chairman of the Company since 1988 and also serves as a director  and/or officer for various
subsidiaries of IBG LLC. Mr. Nemser  has served  as Special  Counsel to the law firm Dechert LLP since
January 2005. Prior to such time Mr. Nemser served  as Partner at the  law  firms  of Swidler Berlin
Shereff Friedman, LLP from 1995 to December 2004 and Cadwalader,  Wickersham & Taft  LLP prior
to 1995. Mr. Nemser received a Bachelor of  Arts degree in economics  from New York University  in
1967 and a Juris Doctor, magna cum laude,  from Boston  University School of Law in 1970.

20

Milan Galik—Mr. Galik joined us in 1990 as a software developer and has served as President of the
Company and IBG LLC since October 2014. Mr. Galik served as  Senior Vice President, Software
Development of IBG LLC from October  2003 to October 2014. In addition, Mr. Galik  has served as
Vice President of Timber Hill LLC since  April 1998 and serves as  a  member  of the board of directors
of the Boston Options Exchange. Mr. Galik  received  a Master of Science  degree  in electrical
engineering from the Technical University  of Budapest  in 1990.

Paul  J. Brody—Mr. Brody has been our Chief Financial Officer,  Treasurer and  Secretary since
November 2006. Mr. Brody joined the  Company in 1987 and has served as  Chief Financial Officer of
IBG LLC since December 2003. Mr.  Brody serves  as a director and/or  officer  for various subsidiaries of
IBG LLC. From 2005 to 2012, Mr. Brody  served as  a director, and for  a  portion of the time as  member
Vice Chairman, of The Options Clearing  Corporation, of  which Timber Hill  LLC and Interactive
Brokers LLC are members. He also  served as a  director of  Quadriserv Inc.,  an electronic securities
lending platform provider, from 2009 to 2015. Mr. Brody received a Bachelor of Arts degree in
economics from Cornell University in  1982.

Thomas A. Frank—Dr. Frank joined us in 1985 and has  served since July 1999 as  Executive Vice
President and Chief Information Officer of Interactive Brokers LLC. In addition, Dr. Frank  has served
as Vice President of Timber Hill LLC since December 1990. Mr. Frank has served as  a director  of  The
Options Clearing Corporation, since 2015.  Dr. Frank  received a Ph.D. in  physics  from the
Massachusetts Institute of Technology  in 1985.

Lawrence E. Harris—Dr. Harris has been a director since July 2007. He is a professor of Finance  and
Business Economics at the University  of  Southern California, where he holds the Fred V. Keenan Chair
in Finance at the Marshall School of Business. Dr. Harris also  serves as trustee of the Clipper Fund,
director of the Selected Funds, and as the research coordinator of the Institute  for Quantitative
Research in Finance. Dr. Harris formerly  served as Chief Economist of the U.S.  Securities  and
Exchange Commission. Dr. Harris earned his Ph.D. in Economics from  the  University  of  Chicago, and
is a CFA charterholder. He is an expert in the economics  of  securities market microstructure  and the
uses of transactions data in financial  research.  He has written extensively about trading rules,
transaction costs, index markets, and market regulation.  Dr. Harris is also the author of the  widely
respected textbook Trading and Exchanges: Market Microstructure  for Practitioners.

Richard Gates—Mr. Gates has been a director since April 2012.  Mr. Gates co-founded TFS Capital, a
registered investment advisor from 1997-2017 that focused on  the equity markets. During those
20 years, TFS won several awards, including the first-ever Morningstar Alternatives Fund Manager  of the
Year. While at TFS, Mr. Gates worked with  the SEC on market structure, short selling regulations,  and
other issues. In 2014, Mr. Gates co-founded Elmagin Capital LLC, an asset manager focused on the
wholesale power markets. Mr. Gates  graduated from the University of Virginia in 1994 with a
bachelor’s degree in Chemical Engineering.

Wayne Wagner—Mr. Wagner has been a director since April  2014. He is  a consultant on issues related
to investment management and securities trading.  He co-founded Plexus Group, now part of ITG, Inc.,
in 1986. Plexus provided trading evaluation and advisory services to money managers, brokerage  firms
and pension plan sponsors. He was also a  founding partner of Wilshire Associates and served as the
Chief Investment Officer of Wilshire  Asset Management.  He  participated in the design of the
operating, balancing and evaluation algorithms for the  world’s first operational index  fund  at Wells
Fargo Bank. He is recognized as instrumental in pioneering processes to reduce the costs of trading.
Mr. Wagner has authored several books  on the topic  of trading and investment management.

21

Gary Katz—Mr. Katz has been a director since January 2017.  He was the President and Chief Executive
Officer of the International Securities Exchange (‘‘ISE’’) and  a co-founder of ISE. Mr. Katz was one of
the principal developers of the unique options market structure—an auction market on an electronic
platform—used by all three options exchanges; ISE, ISE  Gemini and ISE Mercury  and was  named as
inventor or co-inventor on six patents that  the ISE received or applied for relating to its proprietary
trading system and technology. He served on the Executive Board  of  Eurex and  on the  Board of
Directors of The Options Clearing Corporation and chaired the Board’s newly formed technology
committee. Mr. Katz also served on the  Board of Directors of Direct Edge. Mr. Katz graduated  from
New York University with a master’s degree in Statistics with Distinction and a bachelor’s degree from
Queens College. Mr. Katz is currently  chairman of  the board of Farmer’s Pantry LLC, a start-up in the
consumer goods industry and additionally  serves on  the board of Long Island  Autism
Communities, Inc., a not for profit, 501(c)(3) organization  dedicated to developing supportive
integrated communities for adults with autism.

ITEM 1A. RISK FACTORS

We  face a variety of risks that are substantial and inherent  in our businesses,  including market,
liquidity, credit, operational, legal and regulatory. In addition to the risks identified elsewhere in this
Annual Report on Form 10-K, the following risk  factors apply  to  our business results of  operations and
financial condition:

Risks Related to Our Company Structure

Control by Mr. Thomas Peterffy of a majority of the combined  voting power  of our  common  stock may give
rise to conflicts of interests and could discourage a  change  of control that other stockholders may favor, which
could negatively affect our stock price, and  adversely affect stockholders  in  other ways.

Mr. Thomas Peterffy, our founder, Chairman and Chief Executive Officer, and  his affiliates beneficially
own approximately 89.2% of the economic interests and all of  the  voting interests in  Holdings, which
owns all of our Class B common stock, representing approximately 82.6% of the combined voting
power of all classes of our voting stock. As  a result,  Mr. Thomas Peterffy has the ability  to  elect  all  of
the members of our board of directors  and  thereby to control our management and affairs, including
determinations with respect to acquisitions, dispositions, material expansions or contractions of our
business, entry into new lines of business,  borrowings, issuances of common stock or  other securities,
and the declaration and payment of dividends on our common  stock.  In  addition, Mr. Thomas Peterffy
is able to determine the outcome of  all matters requiring stockholder approval and will be able to
cause  or prevent a change of control  of our company or a change  in the composition of our board of
directors and could preclude any unsolicited  acquisition  of  our  company. The concentration  of
ownership could discourage potential takeover attempts that other stockholders may  favor  and could
deprive stockholders of an opportunity  to  receive  a premium for their common stock as part  of  a sale
of our company and this may adversely  affect the market price  of our  common stock.

Moreover, because of Mr. Thomas Peterffy’s substantial ownership, we are  eligible to be and  are,
treated as a ‘‘controlled company’’ for  purposes of the  NASDAQ Marketplace Rules.  As a result, we
are not required by NASDAQ to have a majority  of  independent directors or to maintain
Compensation and Nominating and Corporate Governance Committees composed entirely of
independent directors to continue to  list the  shares of  our common  stock on The  NASDAQ Global
Select Market (‘‘NASDAQ GS’’). Our  Compensation  Committee is  comprised  of  Messrs.  Thomas
Peterffy (Chairman of the Compensation  Committee) and  Earl H. Nemser  (our Vice Chairman).
Mr. Thomas Peterffy’s membership on  the Compensation Committee  may give rise to conflicts of
interests in that Mr. Thomas Peterffy  is able to influence all matters relating to executive
compensation, including his own compensation.

22

We are dependent on IBG LLC to distribute cash  to us in amounts sufficient to pay our tax liabilities  and
other expenses.

We  are a holding company and our primary assets are  our  approximately 17.4% equity interest in
IBG LLC and our controlling interest and related rights as the  sole managing member of  IBG LLC
and, as such, we operate and control all  of the business and affairs of IBG LLC and  are able  to
consolidate IBG LLC’s financial results  into  our  financial statements. We have no independent means
of generating revenues. IBG LLC is treated as a partnership for  U.S. federal income tax  purposes and,
as such, is not subject to U.S. federal  income tax. Instead, its taxable income is  allocated on a pro rata
basis to Holdings and us. Accordingly,  we  incur  income  taxes on our proportionate share  of the net
taxable income of IBG LLC, and also  incur expenses related to our operations. We intend  to  cause
IBG LLC to distribute cash to its members in amounts at least equal to that necessary to cover their
tax liabilities, if any, with respect to the  earnings of IBG LLC.  To the extent we need funds to pay such
taxes, or for any other purpose, and IBG  LLC is unable to  provide such  funds,  it could have  a material
adverse effect on our business, financial  condition  and  results of operations.

We are required to pay Holdings for the benefit relating to additional tax depreciation or amortization
deductions we claim as a result of the tax  basis  step-up our subsidiaries received in connection with  our  IPO
and certain subsequent redemptions of  Holdings membership interests.

In connection with our IPO, we purchased  interests  in IBG LLC from Holdings for cash. In  connection
with redemptions of Holdings membership  interests,  we acquired additional  interests  in IBG LLC by
issuing shares of Class A common stock in exchange  for  an equivalent  number of  shares of member
interests in IBG LLC (the ‘‘Redemptions’’).  In  addition, IBG LLC membership  interests  held by
Holdings may be sold in the future to  us and financed by our issuances of shares  of  our  common stock.
The initial purchase and the Redemptions  did,  and  the subsequent purchases may, result in increases in
the tax basis of the tangible and intangible assets of  IBG LLC and  its  subsidiaries  that  otherwise would
not have been available. Such increase will  be  approximately  equal to the amount by which  our stock
price at the time of the purchase exceeds the income tax basis of the assets  of  IBG LLC underlying the
IBG LLC interests acquired by us. These  increases in  tax  basis will result  in increased deductions in
computing our taxable income and resulting tax  savings  for us  generally  over the 15 year  period which
commenced with the initial purchase. We  have  agreed to pay 85% of these  tax savings, if any, to
Holdings as they are realized as additional  consideration for  the IBG LLC interests that we acquire.

As a result of the IPO and the Redemptions by Holdings, the increase in  the tax  basis attributable to
our  interest in IBG LLC is $1.2 billion. The tax  savings  that  we  would actually realize as  a result of this
increase in tax basis likely would be significantly less than  this amount  multiplied  by  our effective  tax
rate due to a number of factors, including  the allocation  of a portion of the increase in  tax basis to
foreign or non-depreciable fixed assets, the  impact of the increase in the tax basis  on our ability to use
foreign tax credits  and the rules relating  to  the amortization of intangible  assets, for example. Based on
facts and assumptions as of December  31,  2017, including  that subsequent purchases of IBG LLC
interests will occur in fully taxable transactions, the potential  tax basis increase resulting  from the
historical and future purchases of the  IBG  LLC interests held by Holdings could be as much as
$14.5 billion. The Tax Receivable Agreement requires  85% of such  tax savings, if any, to be paid to
Holdings, with the balance to be retained  by  us.  The actual increase  in tax basis  depends,  among  other
factors, upon the price of shares of our  common stock at  the time of the purchase and the extent to
which  such purchases are taxable and, as  a result, could differ  materially from this amount. Our  ability
to achieve benefits from any such increase, and the  amount  of  the payments to be made  under the Tax
Receivable Agreement, depends upon  a number of factors,  as discussed above, including  the timing and
amount of our future income.

23

The tax basis of $14.5 billion assumes that (a) all remaining IBG  LLC membership interests held  by
Holdings are purchased by us and (b)  such purchases in  the future  are made at prices that reflect the
closing share  price as of December 31, 2017.  In  order  to  have a $14.5 billion tax basis, the  offering
price per share of Class A common stock  in such future public offering will need  to  exceed  the then
current cost basis per share of Class A common  stock  by approximately $44.89.

If either immediately before or immediately after any purchase or the  related issuance of our stock, the
Holdings members own or are deemed to own, in the  aggregate, more than 20% of our outstanding
common stock, then all or part of any  increase in the  tax  basis of goodwill may not be amortizable and,
thus,  our ability to realize the annual tax savings  that otherwise would have resulted if such tax  basis
were amortizable may be significantly  reduced.  Although the  Holdings  members are prohibited  under
the Exchange Agreement from purchasing  shares of Class A common stock, grants of  our common
stock to employees and directors who  are  also members or  related  to  members  of  Holdings and the
application of certain tax attribution  rules, such  as among family  members  and partners in a
partnership, could result in Holdings members  being  deemed for tax purposes to own shares of Class A
common stock.

If the Internal Revenue Services (‘‘IRS’’) successfully challenges the tax  basis increase, under certain
circumstances, we could be required to make payments to Holdings under  the Tax Receivable
Agreement in excess of our cash tax savings.

Future sales of our common stock in the public market  could lower our  stock price,  and  any  additional  capital
raised by  us through the sale of equity or  convertible securities may  dilute your  ownership in  us.

The members of Holdings have the right  to  cause  the redemption of their Holdings membership
interests over time in connection with offerings  of  shares of  our common  stock. We intend  to  sell
additional shares of common stock in  public offerings in the  future, which may include offerings of our
common stock to finance future purchases  of IBG  LLC  membership interests which,  in turn, will
finance corresponding redemptions of Holdings membership  interests.  These  offerings  and related
transactions are anticipated to occur  at  least annually into the future. The size  and occurrence of these
offerings may be affected by market conditions. We may also  issue additional shares  of common stock
or convertible debt securities to finance future  acquisitions or business combinations. We currently have
approximately 71 million outstanding shares  of common stock. Assuming no  anti-dilution  adjustments
based on combinations or divisions of  our common  stock,  the offerings referred to above could result
in the issuance by us of up to an additional approximately 340 million shares of common stock. It  is
possible, however, that such shares could  be issued in  one or a few  large transactions.

We  cannot predict the size of future issuances  of  our common stock or the  effect,  if  any, that future
issuances and sales of shares of our common  stock  may have on the market price  of  our  common
stock. Sales of substantial amounts of  our  common stock (including shares  issued in connection with an
acquisition), or the perception that such sales could occur, may cause the market price of  our common
stock to decline.

Certain provisions in our amended and  restated certificate of incorporation  may prevent efforts by our
stockholders to change our direction or management.

Provisions contained in our amended and restated certificate of incorporation could make it more
difficult for a third party to acquire us, even  if  doing  so might be beneficial  to  our  stockholders.  For
example, our amended and restated certificate of  incorporation authorizes  our  board of directors to
determine the rights, preferences, privileges  and restrictions of unissued  series of preferred stock,
without any vote or action by our stockholders. We could issue a series of  preferred stock that could
impede the completion of a merger, tender offer or other takeover attempt. These provisions may
discourage potential acquisition proposals and may delay, deter  or prevent  a change of control of us,
including through transactions, and, in particular,  unsolicited  transactions, that some or all of our
stockholders might consider to be desirable. As  a result,  efforts by  our stockholders to change our
direction or management may be unsuccessful.

24

Risks Related to Our Business

Our business may be harmed by global events beyond our  control, including overall slowdowns in  securities
trading.

Like other brokerage and financial services  firms, our business and profitability are  directly affected by
elements that are beyond our control,  such as economic and  political conditions, broad trends in
business and finance, changes in volume of  securities and futures transactions, changes in the markets
in which such transactions occur and changes in how such transactions are processed.  A weakness in
equity markets, such as a slowdown causing reduction in trading volume in U.S. or foreign  securities
and derivatives, has historically resulted in reduced  transaction revenues and would have a material
adverse effect on our business, financial  condition and results of operations.

Our business could be harmed by a systemic  market event.

Some market participants could be overleveraged.  In case of  sudden, large price  movements, such
market participants may not be able  to  meet  their  obligations to brokers who, in turn, may not be able
to meet their obligations to their counterparties. As a result, the financial system or a portion thereof
could collapse, and the impact of such an event could be catastrophic to our business.

Our future success will depend on our response  to the demand  for new services, products and technologies.

The demand for market making services, particularly services that rely on electronic communications
gateways, is characterized by:

(cid:127) rapid technological change;

(cid:127) changing customer demands;

(cid:127) the need to enhance existing services  and  products or introduce  new services and products; and

(cid:127) evolving industry standards.

New services, products and technologies  may  render our existing services, products and technologies
less  competitive. Our future success will depend, in part, on our ability  to respond to the  demand for
new services, products and technologies  on  a timely and cost-effective  basis and to adapt to
technological advancements and changing standards to address the increasingly sophisticated
requirements and varied needs of our customers and prospective customers. We cannot assure you that
we will be successful in developing, introducing  or marketing  new services, products and technologies.
In addition, we may experience difficulties that could delay or prevent the successful development,
introduction or marketing of  these services and products, and our new service and  product
enhancements may not achieve market acceptance.  Any failure on our part to anticipate  or respond
adequately to technological advancements, customer requirements or changing industry standards, or
any significant delays in the development, introduction  or availability of new services, products or
enhancements could have a material adverse effect  on our  business, financial condition and results of
operations.

Our reliance on our computer software could cause us great financial harm in the event of any disruption or
corruption of our computer software. We may  experience technology failures while developing our software.

We  rely  on our computer software to receive and properly process internal  and external  data.  Any
disruption for any reason in the proper  functioning or any  corruption of our  software or erroneous or
corrupted data may cause us to make  erroneous trades or suspend our services and could cause us
great financial harm. To maintain our  competitive advantage,  our software is under continuous
development. As we identify and enhance  our software, there is risk that software failures may occur
and result in service interruptions and  have other unintended consequences.

25

We depend on our proprietary technology, and  our future results may be impacted if we  cannot maintain
technological superiority in our industry.

Our success in the past has largely been attributable to our  sophisticated proprietary  technology that
has taken many years to develop. We  have benefited from the fact that the type  of proprietary
technology equivalent to that which we  employ  has not been widely  available to our competitors. If our
technology becomes more widely available to our  current or future competitors for any reason,  our
operating results may be adversely affected. Additionally, adoption  or  development of similar  or more
advanced technologies by our competitors may require that we devote substantial resources to the
development of more advanced technology to remain competitive. The  markets  in which  we compete
are characterized by rapidly changing technology, evolving industry standards  and changing trading
systems, practices and techniques. Although we have been at the forefront of many  of  these
developments in the past, we may not be able  to  keep up with these rapid changes in  the future,
develop new technology, realize a return  on amounts invested in  developing  new technologies or
remain competitive in the future.

The loss of our key employees would materially adversely affect our business.

Our key executives have substantial experience and have  made  significant contributions  to  our business,
and our continued success is dependent upon  the retention of our key management  executives,  as well
as the services provided by our staff of trading system, technology and  programming  specialists and  a
number of other key managerial, marketing, planning, financial, technical and operations  personnel.
The loss of such key personnel could have a material  adverse effect on  our  business.  Growth in our
business is dependent, to a large degree,  on our ability to retain and attract such  employees.

We may  not pay dividends on our common  stock at any time in the foreseeable  future.

As a holding company for our interest  in IBG  LLC,  we will be dependent upon  the ability of IBG LLC
to generate earnings and cash flows and distribute them to us  so  that we may pay  any dividends to our
stockholders. To the extent (if any) that we have  excess  cash, any decision to declare and  pay dividends
in the future will be made at the discretion  of our board of directors  and will depend on, among other
things, our results of operations, financial conditions, cash requirement, contractual restrictions and
other factors that our board of directors may  deem  relevant.  Since the  second  quarter  of  2011, we  have
declared and paid a quarterly cash dividend of $0.10 per share. Although  not  required, we currently
intend to pay quarterly dividends of $0.10  per  share to our common stockholders for the foreseeable
future.

Our future efforts to sell shares or raise  additional  capital may  be delayed or  prohibited by  regulations.

As certain of our subsidiaries are members of FINRA, we  are subject to certain  regulations regarding
changes in control of our ownership. FINRA  Rule 1017  generally provides that FINRA approval must
be obtained in connection with any transaction resulting in a change in control of  a member firm.
FINRA defines control as ownership of  25% or more of  the firm’s equity by a single entity or  person
and would include a change in control of a parent company. IBUK, THC, IBC,  and IBHK  are subject
to similar change in control regulations  promulgated by the  FCA in the United Kingdom, the IIROC in
Canada and the SFC in Hong Kong, respectively. As  a result  of  these  regulations, our future  efforts to
sell shares or raise additional capital may be delayed or prohibited.  We may be subject to similar
restrictions in other jurisdictions in which we operate.

26

Regulatory and legal uncertainties could  harm our  business.

The securities and derivatives businesses  are heavily  regulated. Firms  in financial service industries have
been subject to an increasingly regulated environment over  recent years, and penalties and fines  sought
by regulatory authorities have increased  accordingly.  This regulatory and enforcement environment has
created uncertainty with respect to various types of transactions that  historically had been entered into
by financial services firms and that were generally believed to be permissible and  appropriate.  Our
broker-dealer subsidiaries are subject to regulations in the  U.S. and abroad covering all aspects  of their
business. Regulatory bodies include,  in  the U.S., the SEC, FINRA, the Board  of Governors of the
Federal Reserve System, the Chicago  Board  Options Exchange,  the Chicago Mercantile  Exchange, the
CFTC, and the NFA; in Canada, the Investment Industry Regulatory Organization of  Canada  and
various Canadian securities commissions;  in the United Kingdom,  the Financial Conduct Authority; in
Switzerland, the Swiss Financial Market Supervisory Authority; in India, the Securities and Exchange
Board of India; in Hong Kong, the Securities and Futures Commission;  in Australia, the Australian
Securities and Investment Commission;  and  in Japan, the  Financial Supervisory Agency and the Japan
Securities Dealers Association. Our mode of operation and profitability  may be directly affected  by
additional legislation changes in rules promulgated by various domestic  and foreign  government
agencies and self-regulatory organizations  that oversee  our businesses,  and  changes in the  interpretation
or enforcement of existing laws and rules,  including the potential imposition  of transaction taxes.
Noncompliance with applicable laws or  regulations could result in  sanctions being levied against us,
including fines and censures, suspension or  expulsion from  a  certain jurisdiction or market or the
revocation or limitation of licenses. Noncompliance with  applicable  laws or regulations  could  adversely
affect our reputation, prospects, revenues  and earnings. In  addition, changes in current  laws  or
regulations or in governmental policies could adversely  affect our  business, financial condition and
results of operations.

Domestic and foreign stock exchanges, other self-regulatory  organizations and state and foreign
securities commissions can censure, fine,  issue  cease-and-desist orders, suspend or  expel  a broker-dealer
or any of its officers or employees. Our  ability to comply with  all applicable  laws  and rules is largely
dependent on our internal system to  ensure compliance, as well as our  ability  to  attract and  retain
qualified compliance personnel. We could  be subject to disciplinary or other actions in the future due
to claimed noncompliance, which could  have a  material adverse effect on our  business,  financial
condition and results of operations. To  continue to operate and to expand our services internationally,
we may have to comply with the regulatory  controls of each country  in which we conduct, or intend to
conduct business, the requirements of which may not be clearly defined.  The  varying compliance
requirements of these different regulatory  jurisdictions, which are often  unclear, may limit our ability to
continue existing international operations  and  further expand internationally.

Our direct market access clearing and non-clearing brokerage operations face intense competition.

With respect to our direct market access  brokerage business,  the market for  electronic and  interactive
bidding, offering and trading services in  connection  with equities,  options and futures is relatively new,
rapidly evolving and intensely competitive. We expect competition to continue  and intensify in the
future. Our current and potential future  competition  principally comes from  five categories of
competitors:

(cid:127) prime brokers who, in an effort to  satisfy the demands of their customers for hands-on

electronic trading facilities, universal access to markets, smart routing, better trading tools, lower
commissions and financing rates, have  embarked upon building such facilities and product
enhancements;

(cid:127) direct  market access and online options  and  futures firms;

(cid:127) direct  market access and online equity brokers;

27

(cid:127) software development firms and vendors who  create global  trading  networks and analytical tools

and make them available to brokers; and

(cid:127) traditional brokers.

In addition, we compete with financial  institutions, mutual fund  sponsors  and other organizations, many
of which provide online, direct market  access or  other  investing  services. A number of brokers provide
our  technology and execution services  to  their customers, and these brokers will  become our
competitors if they develop their own technology. Some of  our competitors  in this area have greater
name recognition, longer operating histories  and significantly greater financial, technical, marketing and
other resources than we have and offer  a wider range of services and financial products than  we do.
Some of our competitors may also have  an  ability  to  charge  lower commissions.  We  cannot assure you
that we will be able to compete effectively or efficiently with current or  future competitors. These
increasing levels of competition in the  online  trading  industry  could significantly harm this  aspect of our
business.

We are subject to potential losses as a result  of our  clearing and execution activities.

As a clearing member firm providing financing services  to  certain of our brokerage customers, we are
ultimately responsible for their financial performance in  connection with  various stock, options and
futures transactions. Our clearing operations require  a commitment of our capital  and, despite
safeguards implemented by our software,  involve risks of losses  due to the potential failure of our
customers to perform their obligations  under these transactions. If our customers default on their
obligations, we remain financially liable  for such obligations, and  although these obligations are
collateralized, we are subject to market  risk  in the liquidation of customer collateral  to  satisfy  those
obligations. There can be no assurance  that our risk management  procedures will be adequate. Any
liability arising from clearing operations could  have a material  adverse effect  on our business, financial
condition and results of operations.

As a clearing member firm of securities and commodities clearing houses in the  U.S. and abroad, we
are also exposed to clearing member credit risk.  Securities and  commodities clearing  houses  require
member firms to deposit cash and/or  government securities to a clearing fund. If a  clearing member
defaults in its obligations to the clearing house  in an  amount  larger than its own  margin and clearing
fund deposits, the shortfall is absorbed pro rata  from the deposits  of the other clearing members. Many
clearing houses of which we are members also have the  authority  to  assess their  members for  additional
funds  if the clearing fund is depleted. A large  clearing member  default could result  in a substantial cost
to us if we are required to pay such assessments.

We are exposed to risks associated with  our international  operations.

During  2017, approximately 18% of our net  revenues were generated by  our operating companies
outside the U.S. We are exposed to risks  and uncertainties inherent in  doing business in international
markets, particularly in the heavily regulated brokerage industry.  Such  risks and uncertainties include
political, economic and financial instability;  unexpected changes in  regulatory requirements, tariffs  and
other trade barriers; exchange rate fluctuations; applicable currency controls; and  difficulties in  staffing,
including reliance on newly hired local  experts, and managing  foreign operations. These  risks could
cause  a material adverse effect on our  business,  financial  condition and results of  operations.

We do not have fully redundant systems.  System failures could harm  our business.

If our systems fail to perform, we could  experience unanticipated disruptions  in operations, slower
response times or decreased customer  service and customer satisfaction. Our ability to facilitate
transactions successfully and provide  high quality customer  service also depends on the efficient and
uninterrupted operation of our computer  and communications  hardware and software systems. Our

28

service has experienced periodic system  interruptions,  which we believe will continue  to  occur from
time to time. Our systems and operations  also  are vulnerable to damage  or interruption from human
error, natural disasters, power loss, telecommunication  failures, break-ins, sabotage, computer viruses,
intentional acts of vandalism and similar  events. While we  currently maintain redundant servers  to
provide limited service during system  disruptions, we  do not  have fully redundant systems, and  our
formal  disaster recovery plan does not include restoration  of  all services. For  example, we have  backup
facilities at our disaster recovery site  that enable us, in the  case of complete failure  of  our  main
North America data center, to recover and complete  all  pending transactions, provide customers with
access to their accounts to deposit or  withdraw money, transfer positions  to other brokers  and manage
their risk by continuing trading through  the use  of  marketable orders. These backup services  are
currently limited to U.S. markets. We  do not currently have  separate backup facilities dedicated  to  our
non-U.S.  operations. It is our intention  to  provide for and progressively deploy backup facilities for our
global  facilities over time. In addition, we do  not  carry business interruption insurance to compensate
for losses that could occur to the extent  not required. Any system failure  that  causes  an interruption in
our  service or decreases the responsiveness of our service could impair our reputation, damage our
brand name and materially adversely affect  our business, financial condition  and results of operations.

Failure of third-party systems on which we  rely  could adversely affect our business.

We  rely  on certain third-party computer systems  or third-party  service providers,  including clearing
systems, exchange systems, Internet service,  communications facilities and other facilities. Any
interruption in these third-party services, or deterioration  in their performance,  could  be  disruptive to
our  business. If our arrangement with any third  party is terminated, we may not be able  to  find an
alternative source  of systems support  on  a  timely  basis or on commercially  reasonable terms. This could
have a material adverse effect on our  business, financial condition and results of operations.

Internet-related issues may reduce or slow  the growth  in the use of our services in the  future.

Critical issues concerning the commercial  use of the  Internet, such  as ease of access, security,  privacy,
reliability, cost, and quality of service, remain unresolved  and may  adversely impact the growth of
Internet use. If Internet usage continues  to  increase rapidly, the Internet infrastructure may  not  be  able
to support the demands placed on it by this growth, and its performance  and reliability may  decline.
Although our larger institutional customers use leased  data  lines  to  communicate with  us,  our  ability  to
increase the speed with which we provide services to consumers and to increase  the scope and  quality
of such services is limited by and dependent upon the speed and reliability of our customers’  access to
the Internet, which is beyond our control.  If periods of decreased performance,  outages or delays on
the Internet occur frequently or other critical issues concerning  the Internet are  not  resolved, overall
Internet usage or usage of our web based  products could increase more slowly  or decline, which  could
have a material adverse effect on our  business, financial condition and results of operations.

Our computer infrastructure may be vulnerable to security breaches.  Any such problems could jeopardize
confidential information transmitted over  the Internet, cause  interruptions in our operations or cause us to
have liability to third persons.

Our computer infrastructure is potentially  vulnerable to physical  or electronic computer  break-ins,
viruses and similar disruptive problems and security  breaches. Any such  problems  or security breaches
could cause us to have liability to one or more  third  parties, including  our  customers, and disrupt our
operations. A party able to circumvent our security measures could misappropriate proprietary
information or customer information, jeopardize the  confidential nature of information  transmitted
over the Internet or cause interruptions  in  our operations. Concerns  over  the security of  Internet
transactions and the privacy of users  could  also inhibit the growth  of  the Internet or  the electronic
brokerage industry in general, particularly  as  a means of conducting commercial transactions. To the

29

extent that our activities involve the storage and transmission of  proprietary information such as
personal financial information, security  breaches  could  expose us to a risk of financial loss, litigation
and other liabilities. Our estimated annual losses from  reimbursements to customers whose accounts
have been negatively affected by unauthorized access  have historically been less than  $500,000 annually
and effectively zero since the widespread  introduction of our Secure  Transaction Program. Our  current
insurance program may protect us against some, but  not  all, of such losses.  Any  of  these  events,
particularly if they (individually or in the  aggregate) result  in a loss  of confidence in our  company or
electronic brokerage firms in general,  could have a  material  adverse effect on our  business,  financial
condition and results of operations.

We may  not be able to protect our intellectual property rights or may be prevented from using intellectual
property necessary for our business.

We  rely  primarily on trade secret, contract, copyright, patent and trademark laws to protect our
proprietary technology. It is possible that  third parties may copy  or otherwise obtain and  use our
proprietary technology without authorization or otherwise infringe on our rights. We may also face
claims of infringement that could interfere  with our ability  to  use technology that is material to our
business operations.

In the future, we may have to rely on litigation  to  enforce our  intellectual  property rights, protect  our
trade secrets, determine the validity and  scope  of the proprietary rights of  others or defend against
claims of infringement or invalidity. Any  such litigation, whether successful or unsuccessful,  could  result
in substantial costs and the diversion of  resources  and  the attention of management,  any of  which could
negatively affect our business.

We are subject to risks relating to litigation and potential securities laws liability.

We  are exposed to substantial risks of liability under federal  and state securities  laws,  other federal  and
state laws and court decisions, as well  as rules and regulations promulgated  by  the SEC, the  CFTC, the
Federal Reserve, state securities regulators, self-regulatory  organizations and foreign regulatory
agencies. We are also subject to the  risk of  litigation and claims  that may be without  merit. We  could
incur significant legal expenses in defending ourselves against and  resolving lawsuits or  claims.  An
adverse resolution  of any future lawsuits or  claims against us  could result in a  negative perception of
our  company and cause the market price  of our common  stock  to  decline or otherwise  have an adverse
effect on our business, financial condition  and  results of operations. See ‘‘Legal  Proceedings and
Regulatory Matters’’ in Part I Item 3  of this Annual Report on  Form 10-K.

We are subject to counterparty risk whereby defaults by parties with  whom  we do  business can have an
adverse effect on our business, financial  condition and results of operations.

In our electronic brokerage business, our  customer margin credit exposure  is to a great extent mitigated
by our policy of automatically evaluating each  account throughout  the trading  day and  closing  out
positions automatically for accounts that  are found  to  be  under-margined. While this methodology is
effective in most situations, it may not be effective in situations  in which no  liquid market exists for the
relevant securities or commodities or in  which, for any reason, automatic liquidation for certain
accounts has been disabled. If no liquid  market exists  or automatic  liquidation has  been disabled, we
are subject to risks inherent in extending credit,  especially during periods of rapidly declining markets.
Any loss or expense incurred due to  defaults  by  our customers in  failing to repay  margin loans  or to
maintain adequate collateral for these loans  would cause  harm to our business, financial condition and
results of operations.

30

Any future acquisitions may result in significant transaction expenses, integration and consolidation risks and
risks associated with entering new markets, and  we may be unable to profitably operate our consolidated
company.

Although our growth strategy has not focused historically on acquisitions, we  may in the  future engage
in evaluations of potential acquisitions and  new  businesses.  We may not have  the financial  resources
necessary to consummate any acquisitions  in the  future or  the ability to obtain the necessary funds  on
satisfactory terms. Any future acquisitions may  result in significant transaction  expenses and risks
associated with entering new markets  in  addition to integration  and  consolidation  risks.  Because
acquisitions historically have not been a  core part of our growth strategy,  we have  little experience in
successfully utilizing acquisitions. We may  not  have sufficient management, financial and  other
resources to integrate any such future  acquisitions or to successfully operate  new businesses and  we
may be unable to profitably operate our expanded company.

Because our revenues and profitability  depend  on trading volume, they  are prone to significant fluctuations
and are difficult to predict.

Our revenues are dependent on the level of trading activity  on securities  and derivatives exchanges in
the U.S.  and abroad. In the past, our revenues and operating  results have  varied significantly from
period to period primarily due to the  willingness of market maker competitors  to  trade more
aggressively by decreasing their bid/offer  spreads and thereby assuming  more risk  in order to acquire
market share, to movements and trends  in the  underlying  markets, to fluctuations in  trading levels and
also due to the curtailing of our market  making activities.  As a result, period to period  comparisons  of
our  revenues  and operating results may  not  be  meaningful,  and future  revenues and profitability may
be subject to significant fluctuations or  declines.

We may  incur material trading losses from  our market making activities.

A portion of our revenues and operating profits  is derived from our  trading  as principal in  our role as
a market maker and specialist. We may  incur trading  losses  relating  to  these  activities since each
primarily involves  the purchase or sale  of  securities for  our own account. In any period, we may  incur
trading losses in a significant number  of  securities  for a variety of reasons including:

(cid:127) price changes in securities;

(cid:127) lack of liquidity in securities in which we have positions;  and

(cid:127) the required performance of our market  making and specialist  obligations.

These risks may limit or restrict our ability to either resell  securities we purchased or  to  repurchase
securities we sold. In addition, we may  experience  difficulty borrowing securities to make delivery to
purchasers to whom we sold short, or  lenders  from whom we  have borrowed. From time  to  time, we
have large position concentrations in securities of a single issuer or issuers engaged in a  specific
industry or traded in a particular market.  Such  a concentration could  result in higher  trading losses
than would occur if our positions and  activities were  less concentrated.

In our role as a market maker, we attempt to derive a profit from the  difference between the prices at
which  we buy and sell, or sell and buy,  securities.  However, competitive forces  often  require us to
match the quotes other market makers display and  to  hold varying amounts of securities  in inventory.
By  having to maintain inventory positions, we are subjected to a high degree  of risk.  We cannot assure
you that  we will be able to manage such risk successfully or  that we will not experience significant
losses from such activities, which could have a  material adverse  effect on  our business, financial
condition and results of operations.

31

Reduced spreads in securities pricing, levels  of trading activity  and trading through market makers and/or
specialists could harm our business.

Computer-generated buy/sell programs and other technological advances and regulatory changes in the
marketplace may continue to tighten  spreads  on securities transactions.  Tighter spreads and increased
competition could  make the execution of trades and  market making activities less profitable. In
addition, alternative trading systems such as  ECNs are an  alternative for  individual and  institutional
investors, as well as broker-dealers, to  avoid directing their  trades through  market  makers, and could
result in reduced revenues derived from  our market making business.

We may  incur losses in our market making activities in the event of failures of  our  proprietary pricing model.

The success of our market making business  is substantially dependent on the  accuracy  of our
proprietary pricing mathematical model, which continuously  evaluates and monitors the risks inherent
in our portfolio, assimilates market data and reevaluates  our outstanding quotes many  times per
second.  Our model is designed to automatically rebalance our positions throughout  the trading  day to
manage risk exposures on our positions in options, futures and the underlying securities.  In  the event of
a flaw in our pricing model and/or a failure in the  related  software, our  pricing  model  may lead to
unexpected and/or unprofitable trades, which may result  in material trading losses.

The valuation of the financial instruments  we hold may  result in large and occasionally  anomalous  swings in
the value of our positions and in our earnings  in  any period.

The market prices of our long and short  positions are reflected on  our books at closing prices  which
are typically the last trade price before  the official close of the primary exchange  on which  each such
security trades. Given that we manage a  globally integrated portfolio, we  may have large  and
substantially offsetting positions in securities  that  trade on  different  exchanges  that  close at  different
times of the trading day. As a result, there  may be large and occasionally anomalous  swings in the
value of our positions daily and, accordingly, in  our  earnings in  any  period. This is especially true on
the last business day of each calendar quarter.

We are exposed to losses due to lack of perfect information.

As market makers, we provide liquidity by  buying from sellers  and  selling to buyers. Quite often, we
trade with others who have different  information  than we do, and  as a  result, we  may accumulate
unfavorable positions preceding large  price movements  in companies.  Should the  frequency  or
magnitude of these events increase, our  losses will likely increase correspondingly.

Rules governing specialists and designated market makers may require us to make unprofitable trades  or
prevent us from making profitable trades.

Specialists and designated market makers  are  granted certain rights  and have certain obligations to
‘‘make a market’’ in a particular security.  They  agree  to  specific obligations to maintain a fair and
orderly  market. In acting as a specialist or  designated market maker, we are subjected  to  a high degree
of risk by having to support an orderly market. In this role, we may  at  times be required to make
trades that adversely affect our profitability.  In addition, we may at  times  be  unable to trade for our
own account in circumstances in which  it may be to our advantage to trade, and we  may be obligated
to act  as  a principal when buyers or sellers outnumber each  other. In  those instances, we  may take  a
position counter to the market, buying  or  selling  securities to support an orderly market. Additionally,
the rules of the markets which govern  our  activities as a  specialist or designated  market  maker are
subject to change. If these rules are made more stringent,  our trading revenues and profits  as specialist
or designated market maker could be  adversely affected.

32

We face competition in our market making  activities.

In our market making activities, we compete with other firms  based on our ability to provide  liquidity
at competitive prices and to attract order flow. These  firms  include registered market makers as well  as
HFTs that act as market makers. Both  types of  competitors  range from sole  proprietors with very
limited resources to a few highly sophisticated groups which have substantially greater financial  and
other resources, including research and development personnel,  than we do. These larger and  better
capitalized competitors may be better  able  to  respond to changes in the market making  industry, to
compete for skilled professionals, to finance  acquisitions,  to fund internal  growth and  to  compete for
market share generally. HFTs that are  not  registered  market  makers  have certain advantages over
registered market making firms that may allow  them  to  bypass regulatory  restrictions and trade more
quickly and cheaply than registered market  makers at some exchanges. We may  not  be  able to compete
effectively against HFTs or market makers with greater financial  resources,  and our failure  to  do  so
could materially and adversely affect our business, financial condition and  results of operations. As in
the past, we may in the future face enhanced competition, resulting in  narrowing bid/offer spreads in
the marketplace that may adversely impact  our financial performance. This is  especially likely if HFTs
continue to receive advantages in capturing order flow or if others can acquire  systems that enable
them to predict markets or process trades  more efficiently than we can.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

33

ITEM 2. PROPERTIES

Our headquarters are located in Greenwich,  Connecticut. We  also lease facilities in 19 other locations
throughout parts of the world where we conduct  our operations  as set forth below. Unless otherwise
indicated, all  properties are used by both  our market making and electronic  brokerage segments.  We
believe our present facilities, together  with  our current options to extend lease terms, are  adequate for
our  current needs.

The following table sets forth certain information with respect to our  leased facilities:

Location

North America

Greenwich, CT . . . . . . . . . . . . . . . . . . . .
Greenwich, CT . . . . . . . . . . . . . . . . . . . .
Chicago, IL . . . . . . . . . . . . . . . . . . . . . . .
Washington, D.C.
. . . . . . . . . . . . . . . . . .
West  Palm Beach, FL . . . . . . . . . . . . . . .
Montreal, Canada . . . . . . . . . . . . . . . . . .
Vancouver, Canada . . . . . . . . . . . . . . . . .
Boston, MA . . . . . . . . . . . . . . . . . . . . . .
San Francisco, CA . . . . . . . . . . . . . . . . . .
Secaucus, NJ . . . . . . . . . . . . . . . . . . . . . .

Europe

Zug, Switzerland . . . . . . . . . . . . . . . . . . .
Zug, Switzerland . . . . . . . . . . . . . . . . . . .
London, United Kingdom . . . . . . . . . . . .
Tallinn, Estonia . . . . . . . . . . . . . . . . . . . .
Budapest, Hungary . . . . . . . . . . . . . . . . .
St. Petersburg, Russia . . . . . . . . . . . . . . .
Vaduz, Liechtenstein . . . . . . . . . . . . . . . .

Asia—Pacific

Mumbai, India . . . . . . . . . . . . . . . . . . . .
Mumbai, India . . . . . . . . . . . . . . . . . . . .
Hong Kong . . . . . . . . . . . . . . . . . . . . . . .
Hong Kong . . . . . . . . . . . . . . . . . . . . . . .
Shanghai, China . . . . . . . . . . . . . . . . . . .
Sydney, Australia . . . . . . . . . . . . . . . . . . .
Tokyo, Japan . . . . . . . . . . . . . . . . . . . . . .

Space (sq. feet)

Expiration

Principal Usage

162,273
42,196
48,275
8,884
8,509
4,566
2,737
2,348
833
785

19,246
4,435
12,969
7,875
6,412
2,742
2,370

12,061
11,229
8,872
6,739
3,635
3,400
2,161

2030
2019
2026
2024
2027
2019
2021
2021
2019
2022

2018
2021
2023
2023
2018
2018
2018

2020
2022
2018
2019
2021
2023
2019

Headquarters  and  data  center
Office space
Office space
Office space
Office space
Office space
Office space
Office space
Office space
Office space

Office space and  data center
Office space
Office space
Office space
Office space
Office space
Data center

Office space
Office space
Office space
Office space
Office space
Office space
Office space

ITEM 3. LEGAL PROCEEDINGS AND REGULATORY MATTERS

The securities and commodities industry is highly  regulated and many  aspects  of our  business  involve
substantial risk of liability. In recent  years, there has been an increasing incidence of  litigation involving
the brokerage industry, including class  action suits that generally seek substantial damages, including in
some cases punitive damages. Compliance  and  trading  problems that  are reported to federal, state and
provincial regulators, exchanges or other  self-regulatory organizations by dissatisfied customers are
investigated by such regulatory bodies,  and, if pursued  by such  regulatory body or such customers, may
rise to the level of arbitration or disciplinary action.  We are also subject to periodic regulatory audits
and inspections.

Like other brokerage firms, we have been named as a  defendant in lawsuits and  from time  to  time we
have been threatened with, or named as  a  defendant in, arbitrations and  administrative proceedings.

34

The following contains information regarding potentially material  pending litigation  and pending
regulatory inquiries. We may in the future become involved in additional litigation or regulatory
proceedings in the ordinary course of  our business, including  litigation or regulatory  proceedings that
could be material to our business.

Trading Technologies Matter

On February 3, 2010, Trading Technologies  International,  Inc. (‘‘Trading Technologies’’) filed a
complaint in the U.S. District Court for the  Northern  District of Illinois,  Eastern Division,  against
IBG, Inc., IBG LLC, Holdings, and IB  LLC.  Thereafter, Trading Technologies dismissed IBG,  Inc. and
Holdings from the case, leaving only  IBG LLC and IB LLC  as defendants  (‘‘Defendants’’). The
operative complaint, as amended, alleges that  the Defendants  have infringed and  continue to infringe
twelve U.S. patents held by Trading Technologies. Trading Technologies is seeking,  among  other  things,
unspecified damages and injunctive relief  (‘‘the Litigation’’). The Defendants filed an answer  to  Trading
Technologies’ amended complaint, as  well as  related counterclaims. The Defendants deny Trading
Technologies’ claims, assert that the asserted patents are  not  infringed and are invalid, and assert
several other defenses as well. Trading Technologies  also filed patent infringement  lawsuits  against
approximately a dozen other companies in the same court. The Litigation  was consolidated with the
other lawsuits filed by Trading Technologies.

The Defendants and/or certain codefendants  filed petitions with the United States Patent and
Trademark Office (‘‘USPTO’’) for Covered  Business Method  Review (‘‘CBM  Review’’) on the asserted
patents. The District Court granted the Defendants’ motion  to  stay the Litigation pending the CBM
Reviews. The USPTO Patent Trial and  Appeal Board  found ten of the  twelve asserted patents  to  be
not patentable and two patents to be  patentable. The Defendants have filed  appeals on the claims that
were held to be patentable.

It  is difficult to predict the outcome of  the matter,  however, the  Company believes  it has  meritorious
defenses to the allegations made in the  complaint  and  intends to defend itself vigorously against  them.
However, litigation is inherently uncertain  and there can be no  guarantee  that  the Company will prevail
or that the Litigation can be settled on  favorable terms.

Class Action Matter

On December 18, 2015, a former individual  customer filed a purported class action complaint against
IB LLC, IBG, Inc., and Thomas Frank,  PhD, the Company’s Executive Vice President and  Chief
Information Officer, in the U.S. District Court for the District of Connecticut.  The  complaint alleges
that the former customer and members of the  purported class of IB LLC’s  customers  were harmed  by
alleged ‘‘flaws’’ in the computerized system used by the Company to close out (i.e., liquidate) positions
in customer brokerage accounts that have margin deficiencies. The  complaint  seeks, among other
things, undefined compensatory damages and  declaratory and  injunctive relief.

On February 19, 2016, the Company  filed a motion to dismiss the  class action  complaint.  On
September 28, 2016, the Court issued an order granting  the Company’s motion to dismiss and
dismissing the complaint in its entirety,  and without providing  plaintiff  leave to amend. On October 5,
2016, the Court entered judgment in  the Company’s favor.  On October 12, 2016,  plaintiff  filed motions
for leave to file an amended complaint  and to vacate or  amend judgment. On  November 14, 2016,
plaintiff also filed a motion to disqualify the  district judge. The Company opposed all three motions. In
memoranda of decision dated August  29, 2017  and September 5, 2017,  the  Court denied the motions.
On September 28, 2017, plaintiff appealed  the order of dismissal and subsequent judgment to the
United States Court of Appeals for the  Second Circuit.  On January 9,  2018, the  plaintiff  filed his
appellate brief. The opposition brief is currently due on April 10, 2018. We believe that the  appeal, like
the original complaint, lacks merit. Further, even if the Court’s dismissal  were to be overturned on

35

appeal, we do not believe that a purported  class action  is appropriate given the  great differences in
portfolios, markets and many other circumstances surrounding the liquidation of any particular
customer’s margin-deficient account. IB LLC and the related defendants intend to continue  to  defend
themselves vigorously against the case  and, consistent with past practice in  connection with  this  type of
unwarranted action, any potential claims  for counsel fees and expenses  incurred in  defending the  case
shall be  fully pursued against the plaintiff.

Pending Regulatory Inquiries

Our businesses are heavily regulated by  state,  federal  and foreign regulatory  agencies as  well as
numerous exchanges and self-regulatory  organizations. Most of our companies  are regulated under
some or all of the following: state securities laws, U.S.  and  foreign securities, commodities and financial
services laws and the rules of the more  than  120 exchanges,  market  centers and  self-regulatory
organizations of which one or more of  our companies may  be  members.  In  the current era  of
dramatically heightened regulatory scrutiny of financial institutions, we have  incurred sharply increased
compliance costs, along with the industry as  a whole.  Increased regulation  also creates increased
barriers  to entry, however, we have built  human  and automated infrastructure  to  handle  increased
regulatory scrutiny, which provides us with a possible advantage over  potential newcomers to the
business.

We  receive hundreds or thousands of regulatory inquiries each  year in addition to being subject to
frequent regulatory examinations. The  great majority of  these  inquiries do  not  lead to fines or  any
further action against us. Most often, regulators do not inform us  as to when  and if an  inquiry  has been
concluded. We are currently the subject  of regulatory inquiries regarding topics such as  order  audit trail
reporting, trade reporting, best execution,  short sales, margin lending,  anti-money laundering,
technology development practices, business continuity planning and other topics of recent  regulatory
interest. We are unaware of any specific  regulatory  matter that, itself, or  together  with regulatory
matters on the same specific topic, would have a material  impact on our business, financial condition
and results of operations. Nonetheless,  in  the current climate, we expect to pay  significant and
increasing regulatory fines on various  topics on  an ongoing basis,  as other regulated financial services
businesses do. The amount of any fines,  and  when and if they  will be incurred, is impossible to predict
given the nature of the regulatory process.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

36

PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY; RELATED STOCKHOLDER

MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Common Stock Information

The following table shows the high and low sale prices for the periods  indicated for our  common stock,
as reported by NASDAQ :

2016

First Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2017

First Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sales Price

High

Low

(in dollars)

$43.14
$41.40
$37.39
$39.68

$39.51
$38.23
$45.08
$62.33

$29.50
$33.75
$33.66
$31.97

$34.11
$33.01
$36.23
$44.80

The closing price of our common stock on February 22,  2018,  as reported  by  NASDAQ, was $67.52 per
share.

Holders

On February 20, 2018, there were six holders  of  record, which  does not reflect those shares  held
beneficially or those shares held in ‘‘street’’ name.  Accordingly, the number of  beneficial  owners of our
common stock exceeds this number.

Dividends and Other Restrictions

During  the second quarter of 2011, we declared  and paid a cash  dividend of  $0.10 per share and have
continued this quarterly dividend policy  through the current fiscal year end and into the first quarter of
2018. We currently intend to pay quarterly dividends of $0.10 per share to our common stockholders
for the foreseeable future.

37

Stockholder Return Performance Graph

The following graph compares cumulative  total stockholder return on our common stock, the S&P 500
Index and the NASDAQ Financial-100 Index from December 31,  2012 to December  29, 2017. The
comparison assumes $100 was invested  on  December  31, 2012 in  our common stock and  each of the
foregoing indices and assumes reinvestment of dividends before consideration  of income taxes.

600

500

400

300

200

100

-

12/31/2012

S&P 500

Nasdaq Financial 100

IBKR

4/30/2013

8/31/2013

12/31/2013

4/30/2014

8/31/2014

12/31/2014

4/30/2015

8/31/2015

12/31/2015

4/30/2016

8/31/2016

12/31/2016

4/30/2017

12/31/2017
8/31/2017
26FEB201821540609

(1) The NASDAQ Financial-100 Index  includes 100 of the  largest domestic and international financial
securities listed on The NASDAQ Stock Market based  on market capitalization.  They include
companies classified according to the  Industry  Classification Benchmark as Financials, which are
included within the NASDAQ Bank, NASDAQ  Insurance, and NASDAQ  Other Finance  Indexes.

(2) The S&P 500 Index includes 500 large cap common stocks actively traded in the U.S. The stocks

included in the S&P 500 are those of  large  publicly  held companies that  trade  on either  of the two
largest American stock markets, the New York Stock Exchange and  NASDAQ.

The stock performance depicted in the graph above is not  to  be  relied upon as indicative  of future
performance. The stock performance graph shall not be deemed  to  be  incorporated  by  reference into
any of our filings under the Securities Act or the  Exchange Act,  except  to  the extent that we
specifically incorporate the same by reference,  nor shall it  be deemed to be ‘‘soliciting material’’ or  to
be ‘‘filed’’ with the SEC or subject to  Regulations  14A or 14C or to the liabilities of Section 18 of the
Exchange Act.

Use of Proceeds from Member Redemption

Purchases of IBG LLC membership interests, held  by Holdings, by  the Company are governed by the
Exchange Agreement, a copy of which  was  filed  as an exhibit  to  our Quarterly Report  on Form 10-Q
for the quarter ended September 30, 2009 and filed  with the  SEC on  November 9, 2009. The Exchange
Agreement, as amended June 6, 2012 and July 23,  2015, provides  that the Company may  facilitate  the
redemption by Holdings of interests  held  by its members through the issuance of shares  of common
stock through a public offering in exchange  for the  interests in IBG  LLC  being  redeemed by Holdings.
On an annual basis, each holder of a  membership interest may request that Holdings  redeem the
liquefiable portion of that holder’s interest.  We  expect Holdings to use the  net proceeds  it receives
from such sales to redeem an identical  number of Holdings  membership interests from the  requesting
holders.

38

At the time of the Company’s IPO in 2007, three  hundred sixty (360) million shares of  authorized
common stock were reserved for future sales and redemptions. From 2008  through 2016, Holdings
redeemed 17,656,754 IBG LLC shares  with an approximate total value of $476  million, which
redemptions were funded using cash  on  hand at  IBG LLC and  through issuances of  common stock.

On July 28, 2017, the Company issued 1,214,860  shares of  Class  A  common stock (with a  fair value  of
$49 million) to Holdings, for sale for  the benefit of, certain  of  its  members in exchange for  membership
interests in IBG LLC equal in number to such number of  shares of common stock issued  by  the
Company. The acquired shares were  sold  for the  benefit of certain  of the members of Holdings who
elected to redeem a portion of their Holdings membership  interests  in open market transactions
pursuant to one or more Rule 10b5-1  trading plans  (collectively, the ‘‘Plans’’).  All sales made  pursuant
to the Plans are disclosed publicly in accordance  with applicable securities  laws,  rules and  regulations
through appropriate filings with the SEC,  as  applicable.

As a consequence of this transaction,  IBG, Inc.’s  interest  in IBG  LLC increased  to  approximately
17.4%, with Holdings owning the remaining  82.6%. The redemptions also resulted in  an increase in  the
Holdings interest held by Mr. Thomas  Peterffy and  his affiliates from approximately  89.1% to
approximately 89.2%.

On October 13, 2015, the Company filed  a Post-Effective Amendment to multiple Registration
Statements filed under the Securities  Act  of 1933,  as amended (the ‘‘Securities  Act’’) on  Form S-8 that
registered shares of the Company’s Class  A  common stock, $0.01 par  value,  for issuance under the
Company’s 2007 Stock Incentive Plan  (the ‘‘Plan’’): Registration No. 333-142686, filed on  May 7,  2007;
Registration No. 333-174913, filed on  June 15, 2011; and Registration  No. 333-203358, filed on
April 10, 2015.

The Plan provides  employees with two options to pay for  their withholding tax  obligations, which
become  due when restricted stock units vest  into shares: either  (1) reimburse the Company via  cash
payment, or (2) elect to have the Selling Stockholder withhold  a  portion of the vesting shares. In the
case of employees who elect to have the  IBG  LLC withhold  shares to cover  their  tax obligations,  those
shares are transferred to IBG LLC, which  in turn, sells those shares in  open market transactions to
recover the amount paid to the tax authorities on the employees’  behalf. For the  year  ended
December 31, 2017 the Company sold 596,135 shares of its  Class  A common stock withheld from
employees (with a fair value of $21 million) in  open market transactions.  The  proceeds were used to
reimburse the Company for withholding taxes  paid by the Company on the employees’ behalf.

As per General Instruction C of Form S-8, the  sale of the shares described above constitutes a  resale
or reoffer of the Company’s Class A  common stock.  The  Post-Effective Amendment contains a  reoffer
prospectus that registers 6,400,000 shares  of the  Company’s Class A common  stock which represents
the Company’s estimate of shares that  will be withheld from  employees related  to  the vesting of Plan
shares over the next nine years based  on current tax rates and historical employee elections. The
Company has re-issued 1,517,011 shares  under this reoffer prospectus supplement. The reoffer
prospectus allows for future sales by IBG LLC, on  a continuous  or delayed  basis, to the  public without
restriction.

39

Securities Authorized for Issuance under Equity  Compensation Plans

The following table provides information  about shares  of  common stock available for  future awards
under all of the Company’s equity compensation  plans as of December 31, 2017. The  Company has not
made grants of common stock outside of its equity compensation plans.

Number of securities to be
issued upon exercise of
outstanding options,
warrants and rights

Weighted-average exercise
price of outstanding options
warrants and rights

Number of securities
remaining available for
future awards under
equity compensation plans(1)

Equity compensation plans
approved by security
holders . . . . . . . . . . . . . .

Equity compensation plans
not approved by security
holders . . . . . . . . . . . . . .

Total . . . . . . . . . . . . . . . . .

N/A

N/A

—

N/A

N/A

—

—

7,048,669

—

(1) In 2017, the Company amended the  2007 Stock Incentive Plan (the ‘‘Stock  Incentive  Plan’’) to

extend its term for a ten-year period through April,  24, 2027, pending stockholders’ approval  at the
Company’s 2018 Annual Meeting. Amount represents restricted stock units  available  for future
issuance  of grants under the Company’s Stock Incentive Plan, as  amended.

40

ITEM 6. SELECTED FINANCIAL  DATA

The following tables set forth selected historical consolidated  financial and  other  data  of the Company.
They are presented for the years ended,  and as of,  December  31, 2013, 2014,  2015, 2016, and 2017.

Year Ended December 31,

2017

2016

2015

2014

2013

(in millions, except share and per share amounts)

Consolidated Statement of Comprehensive

Income Data

Revenues

Trading gains . . . . . . . . . . . . . . . . . . . . . . . $
Commissions . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . .
Other (loss) income(1) . . . . . . . . . . . . . . . .

40 $
647
908
332

Total revenues

. . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . .

Total net revenues . . . . . . . . . . . . . . . . . .

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . .
Fixed expenses . . . . . . . . . . . . . . . . . . . . . .
Customer bad debt(2) . . . . . . . . . . . . . . . . .

Total non-interest expenses . . . . . . . . . . . .

Income before income taxes . . . . . . . . . . . . . .
Income tax expense(1) . . . . . . . . . . . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . . . . .
Less net income attributable to noncontrolling
interests . . . . . . . . . . . . . . . . . . . . . . . . .

1,927
225

1,702

241
410
2

653

1,049
256

793

717

163 $
612
606
94

1,475
79

1,396

269 $
617
492
(122)

1,256
67

1,189

261 $
549
416
(111)

1,115
72

1,043

331
502
304
(9)

1,128
52

1,076

244
385
6

635

761
62

699

615

231
354
146

731

458
43

415

366

212
322
3

537

506
47

459

414

243
315
67

625

451
33

418

381

37

0.74

0.73

Net income available for common stockholders . $

76 $

84 $

49 $

45 $

Earnings per share

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . $

1.09 $

1.07 $

1.28 $

1.25 $

0.80 $

0.78 $

0.79 $

0.77 $

Comprehensive income available for common

stockholders . . . . . . . . . . . . . . . . . . . . . . . $

87 $

80 $

39 $

30 $

34

Comprehensive income attributable to

noncontrolling interests . . . . . . . . . . . . . . . . $

771 $

594 $

313 $

322 $

356

Comprehensive earnings per share

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Weighted average common shares outstanding

1.24 $

1.22 $

1.21 $

1.19 $

0.64 $

0.62 $

0.52 $

0.51 $

0.69

0.67

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . .

69,926,933

66,013,247

61,043,071

56,492,381

49,742,428

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . .

70,904,921

67,299,413

62,509,796

57,709,668

50,924,736

(1) The results for 2017  include the impact  of  the  Tax Cuts  and  Job  Act  (‘‘Tax  Act’’) which  was  enacted  on

December 22, 2017.  The  Tax Act resulted  in  additional income tax  expense of $62  million  for the  one-time
transition tax on deemed repatriation of earnings of  some  of our  foreign subsidiaries and  $115 million from
the remeasurement of the Company’s deferred tax assets  at the  reduced  corporate income tax  rate  of  21%.
Other income includes a $93 million gain from  the remeasurement of  Tax  Receivable  Agreement  liability,
payable to Holdings, which is associated with  and  offsetting  to  the  expense on  remeasurement  of  deferred  tax
assets. See Note 4 and Note  10 to the audited  consolidated  financial statements,  in Part II,  Item  8 of this
Annual Report on Form 10-K.

41

(2) The results for 2015  include an unusual loss  of  $137  million  as further described  in ‘‘Management’s

Discussion and Analysis of Financial Condition  and  Results  of  Operations’’  in  Part  II Item  7  of  this  Annual
Report on Form 10-K. In October 2013, a small  number  of the Company’s  brokerage  customers had  taken
relatively large positions in four securities listed  on  the  Singapore Exchange. In early  October,  within  a very
short timeframe,  these securities lost  over  90%  of  their  value. The  customer accounts  were margined  and  fell
into deficits totaling $64 million prior to the  time the  Company took possession of their securities  positions.

December 31,

2017

2016

2015

2014

2013

(in millions)

Consolidated Statement of Financial Condition Data . . . .
Cash, cash equivalents and short-term  investments(1) . . . $23,999 $26,053 $23,105 $17,059 $15,591
Total assets(2)(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $61,162 $54,673 $48,734 $43,385 $37,871
Total liabilities(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $54,729 $48,853 $43,390 $38,200 $32,779
707
Stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 1,090 $
Noncontrolling interests . . . . . . . . . . . . . . . . . . . . . . . . . $ 5,343 $ 4,846 $ 4,481 $ 4,419 $ 4,385

863 $

974 $

766 $

(1) Cash, cash equivalents and short-term investments represent cash and cash equivalents,  cash and

securities segregated under federal and  other regulations,  short-term investments  and securities
purchased under agreements to resell.

(2) As of December 31, 2017, approximately $60.8  billion, or  99.3%,  of  total assets  were considered
liquid and consisted primarily of cash, marketable  securities and  collateralized  receivables.

(3) As a result of the Company’s acquisition from  Holdings of IBG LLC membership  interests,  the
Company received not only an interest in  IBG  LLC but  also, for federal income tax purposes, a
step-up to the federal income tax basis of the assets of IBG LLC underlying such  additional
interest. This increased tax basis is expected  to  result in  tax  benefits as a  result of increased
amortization deductions. The Company will retain 15% of the  tax benefits actually realized. As set
forth in the Tax Receivable Agreement the Company  entered into with  Holdings, the Company  will
pay the remaining 85% of the realized tax benefits relating to any applicable  tax year to Holdings.
The deferred tax asset was $146 million, $273 million, $288  million, $279 million,  and $295 million
and the corresponding payable to Holdings  was $187 million, $285  million, $291 million,
$277 million, and $287 million as of December 31,  2017, 2016, 2015, 2014, and 2013, respectively.
See ‘‘Management’s Discussion and Analysis  of  Financial Condition  and Results of Operations’’ in
Part II Item 7 of this Annual Report on Form 10-K  for  additional details related to the  impact  of
the Tax Act on the Company.

42

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION  AND

RESULTS OF OPERATIONS

The following discussion should be read in conjunction with the  audited  consolidated financial
statements and the related notes in Item  8, included  elsewhere in this report. In addition to historical
information, the following discussion  also  contains forward-looking statements that include risks and
uncertainties. Our actual results may differ materially from those anticipated  in these forward-looking
statements as a result of certain factors,  including those set  forth under  the heading ‘‘Risk Factors’’ in
Part I, Item 1A of this Annual Report  on Form  10-K.

Business  Overview

We  are an automated global electronic  broker and  market  maker  (although,  we have substantially
exited the options market making business—see  Note 2—Discontinued Operations and Costs
Associated with Exit or Disposal Activities to the audited consolidated financial statements in Part II,
Item 8 of this Annual Report on Form  10-K).  We custody  and service  accounts for hedge  and mutual
funds,  registered investment advisers, proprietary trading groups,  introducing brokers and individual
investors. We specialize in routing orders and executing and processing trades in  securities, futures and
foreign exchange instruments on more than 120  electronic exchanges  and  market  centers around  the
world. Since our inception in 1977, we have focused on developing proprietary  software to automate
broker-dealer functions. The proliferation of  electronic exchanges in the last 27 years has provided  us
with the opportunity to integrate our  software with  an increasing number of exchanges and  market
centers into one automatically functioning, computerized platform that  requires minimal human
intervention.

In connection with our IPO priced on May  3, 2007,  IBG, Inc.  purchased 10.0% of  the membership
interests in IBG LLC, became the sole managing member of IBG LLC and  began to consolidate
IBG LLC’s financial results into its financial statements. Our primary assets  are our ownership of
approximately 17.4% of the membership interests of IBG LLC, the current  holding  company for  our
businesses, and our controlling interest  and  related contractual  rights  as the  sole  managing member of
IBG LLC. The remaining approximately  82.6% of  IBG LLC membership interests are held by
Holdings, a holding company that is owned by  our  founder, Chairman and  Chief  Executive Officer,
Mr. Thomas Peterffy and his affiliates,  management and other employees  of  IBG LLC, and certain
other members. The IBG LLC membership interests held by Holdings will  be  subject to purchase by us
over time in connection with offerings by  us of  shares of our common stock.

Business  Segments

We  report our results in two operating  business  segments, electronic brokerage and  market making
(being discontinued). These segments  are  analyzed separately as  these are the two principal business
activities from which we derive our revenues and to which we allocate resources.

Electronic Brokerage. We conduct our electronic brokerage  business  through certain Interactive
Brokers (‘‘IB’’) subsidiaries. As an electronic broker, we execute, clear and settle trades globally for
both institutional and individual customers. Capitalizing on  our proprietary technology originally
developed for our market making business,  IB’s systems  provide our  customers  with the capability to
monitor multiple markets around the  world simultaneously and  to  execute trades  electronically in these
markets at a low cost, in multiple products and  currencies from a single trading account. We  offer our
customers access to all classes of tradable, primarily exchange-listed  products, including stocks, bonds,
options, futures, forex and mutual funds traded  on more than 120  exchanges  and market centers in 26
countries and in 23 currencies seamlessly around the  world. The emerging  complexity of multiple
market centers has provided us with the  opportunity of building  and  continuously adapting our order
routing software to secure excellent execution prices.

43

Our customer base is diverse with respect to geography and segments.  Currently, more  than half of our
customers reside outside the U.S. in  over 200 countries and  territories,  with over 50%  of  new
customers coming from outside the U.S.  Approximately 64%  of  our customers’ equity  is in  institutional
accounts such as hedge funds, financial  advisors, proprietary trading desks and introducing brokers.
Specialized products and services that  we have developed  are successfully attracting these accounts.  For
example, we offer prime brokerage services,  including capital introduction and securities lending to
hedge funds; and our model portfolio  technology and automated share  allocation and  rebalancing tools
are particularly attractive to financial advisors.

We  provide a host of analytical tools  such  as IB Investors’ MarketplaceSM, which allows wealth advisors
to search  for money managers and assign  them to customer accounts based on  their investment
strategy. IB EmployeeTrackSM is widely used by compliance officers of financial institutions to
streamline the process of tracking their employees’  brokerage activities. The Probability LabSM allows
our  customers to analyze option strategies under various market assumptions.  IB Portfolio Builder
allows our customers to set up an investment strategy  based on research and  rankings from  top
research providers and fundamental  data.  IB Asset Management recruits  registered  financial  advisors,
vets them, analyzes their investment  track  records, groups them by their risk profile,  and allows retail
investors to assign their accounts to be traded by one or  more advisors.  In addition, Greenwich
Compliance offers direct expert registration and start-up  compliance services,  as well as  answers to
basic day-to-day compliance questions for experienced  investors  and traders  looking to start  their  own
investment advisor firms. Greenwich  Compliance professionals  have regulatory  and industry experience,
and they can help investment advisors  trading  on the IB platform meet their registration and
compliance needs. In 2017, we launched  the  IB Debit Mastercard(cid:3) which allows customers to spend
and borrow directly against their account  and to make purchases  and ATM withdrawals anywhere  Debit
Mastercard(cid:3) is accepted around the world. In 2017, we also launched our Insured Bank Deposit Sweep
Program, which provides customers with up to $2,500,000 of FDIC insurance  on their eligible cash
balances in addition to the existing $250,000 SIPC coverage for a maximum  coverage  of $2,750,000.

Market Making. On March 8, 2017 we announced our intention to discontinue our options market
making  activities globally and we are  currently in the process  of winding down these operations.
Additionally, as we previously announced,  we  entered into a  definitive transaction  to  transfer  our U.S.
options market making operations to Two Sigma Securities,  LLC. This  transaction  closed  on
September 29, 2017. We intend to continue conducting  certain proprietary trading activities  in stocks
and  related instruments to facilitate our electronic  brokerage customers’  trading in products  such as
ETFs, ADRs, CFDs and other financial instruments. However,  we do not expect this activity to be of
sufficient size as to require reporting  these  activities as a separate  segment after we  discontinue our
options market making activities.

We conduct our market making business primarily through our Timber Hill  subsidiaries.  As a  market
maker we provide liquidity by offering  competitively  tight bid/offer spreads over a broad base of
tradable, exchange-listed products. As principal, we commit  our own capital  and derive revenues or
incur losses from the difference between the price paid when securities  are bought  and the  price
received when those securities are sold.  Because we provide continuous bid and offer  quotations and
we are continuously both buying and selling quoted securities,  we may have  either a long  or a short
position in a particular product at a given point in time.  Our entire portfolio is evaluated many times
per second and continuously rebalanced  throughout  the trading day, thus minimizing the risk of our
portfolio at all times. This real-time rebalancing of  our portfolio, together  with our real-time
proprietary risk management system,  enables us to curtail risk.

The operating business segments are  supported by our corporate segment which provides centralized
services and executes our currency diversification  strategy.

44

Business  Environment

Against a backdrop of a still sluggish  trading environment amid historically low  market volatility, we
maintained our position as the largest U.S. electronic broker as measured by the number of customer
revenue trades and increased our Daily  Average Revenue Trades (‘‘DARTs’’) by 4%  from 2016. New
customer account growth remained robust  as total customer accounts increased 25%  from 2016 to
483 thousand. Institutional customers,  such as  hedge funds, mutual  funds, introducing brokers,
proprietary trading groups and financial advisors, comprised  approximately 48% of total accounts and
approximately 64% of total customer equity at the end of  2017. Our  customer base continues to be
geographically diverse, with customers  residing in over  200 countries and territories and over 50% of
new customers come from outside the  U.S. Average  equity per account increased 16%  from 2016 to
$258 thousand, as we continued to attract  larger  customers that seek our  superior technology and  low
costs as well as our securities finance services,  including  margin lending and short sale  support.

Electronic brokerage net interest income grew  30%, compared to 2016.  The Federal Reserve’s increases
in the Federal Funds target rate in December  2016, March 2017,  June  2017 and  December 2017,
together with higher average customer  credit and margin loan  balances, generated significantly more
net interest income than in 2016. Our low margin lending rates are tied to benchmark rates, such  as
the Federal Funds rate in the U.S. In 2017, our customers paid 0.8% to 2.9% for  their U.S. dollar
margin loans with  us. Average customer  credit  balances  rose 14% due  to  an inflow of new  accounts,
and average customer margin loan balances increased  by  41% from 2016 due  to  customers’ appetite for
increased leverage, along with expanded  prime  broker financing.

Market making segment results decreased in  2017 on  lower trading gains,  as expected,  reflecting the
winding down of our options market  making  operations.

The following is a summary of the key  profit drivers that affect our  business and  how they  compared to
2016:

Global trading volumes. According to data received from exchanges worldwide,  volumes in exchange-
listed equity-based options increased  by approximately 7% globally and 3% in the  U.S. for the year
ended December 31, 2017, compared to 2016.  During  2017  we accounted  for approximately 5.1%  (7.9%
in 2016) of the exchange-listed equity-based options volume  traded worldwide (including options on
ETFs and stock index products), and  approximately 7.7% (10.9% in  2016)  of  exchange-listed  equity-
based options volume traded in the U.S.  The decreases in  both measures were driven by our pull-back
in options market making. It is important to note that this metric is  not  directly correlated  with our
profits. See tables on pages 62-63 of this Annual Report  on Form  10-K for additional  details regarding
our trade volumes, contract and share volumes and brokerage  statistics.

Volatility. Since we typically maintain an overall  long volatility position, our market making profits are
generally  correlated with market volatility, protecting  us against a severe market dislocation in either
direction. Based on the Chicago Board Options  Exchange Volatility  Index (‘‘VIX(cid:3)’’), the average
volatility decreased to 11.1 in 2017, down  30% from the  average of 15.9 in 2016. As we  had begun to
wind down our market making activities, volatility had less of an impact in  2017 than  in 2016. Lower
volatility also impacts our electronic  brokerage segment  because it results in fewer trading opportunities
for our  customers. Despite an 8% decline  in average  DARTS per account, our total DARTs increased
4% compared to 2016.

Currency fluctuations. As a global electronic broker and market  maker trading on exchanges around
the world in multiple currencies, we are exposed to foreign  currency risk.  We actively manage this
exposure by keeping our net worth in proportion  to  a defined basket of 14 currencies we call the
‘‘GLOBAL’’ in order to diversify our risk  and  to  align  our hedging strategy with the  currencies  that  we
use in our business. Because we report  our financial  results in  U.S.  dollars, the change in  the value  of
the GLOBAL versus the U.S. dollar affects our earnings. During  2017 the value of the GLOBAL,  as
measured in U.S. dollars, increased 3.06% compared to its value as of  December 31, 2016, which  had a
positive impact on our comprehensive  earnings for 2017.

45

A discussion of our approach for managing foreign currency exposure is contained  in Part  II, Item 7A
of this Annual Report on Form 10-K  entitled  ‘‘Quantitative and Qualitative Disclosures  about Market
Risk.’’

Financial Overview

Diluted earnings per share were $1.07 for the  year  ended December 31, 2017 (‘‘current year’’),
compared to diluted earnings per share of $1.25  for the  year ended December  31, 2016 (‘‘prior year’’).
The calculation of diluted earnings per  share is detailed  in Note  4 to the audited consolidated financial
statements, in Part II, Item 8 of this Annual Report on Form 10-K.

On a comprehensive basis, which includes other comprehensive  income (‘‘OCI’’), diluted earnings per
share were $1.22 for the current year, compared  to  diluted earnings per share of $1.19  for the  prior
year.

In connection with our currency diversification strategy (i.e.,  GLOBALs) at December 31, 2017
approximately 30% of our equity was denominated  in currencies other than the U.S. dollar.  In the
current year, our currency diversification strategy increased our comprehensive  earnings by $175  million
(versus a decrease of $65 million in the  prior  year), as  the U.S. dollar value of the GLOBAL increased
by approximately 3.06%, compared to  its  value as of December 31, 2016. The effects of  our currency
diversification strategy are reported as (1) a  component  of other income in  the consolidated statement
of comprehensive income and (2) OCI  in the consolidated statement of financial condition and the
consolidated statement of comprehensive  income.  The  full effect of the  GLOBAL is captured in
comprehensive income.

In light of our decision to wind down  our  options  market  making activities globally,  we removed the
Singapore dollar (SGD) and realigned  the relative weight of  the  U.S.  dollar  (USD) versus the other
currency components to better reflect  our businesses going forward. The new  composition,  which was
effective as of the close of business on  March  31, 2017, contains 14 currencies, one fewer  than the  prior
composition.

Consolidated: For the current year, our net revenues were $1,702 million  and income before income
taxes was $1,049 million, compared to net revenues of $1,396  million and income before income taxes
of $761 million in the prior year. The  increase  in income before income taxes  in the current  year  was
mainly driven by a 30% increase in net  interest income and a 253% increase  in other income, partially
offset by a 75% decrease in trading gains. Our  pre-tax profit margin was 62%,  compared to 55%  for
the prior year.

The results for the year were negatively impacted  by the effects of the  Tax  Cuts  and Jobs  Act (the ‘‘Tax
Act’’), enacted on December 22, 2017.  The Tax Act significantly revised U.S. corporate income tax law
by, among other things, reducing the corporate income tax  rate  from  35% to 21%  and implementing a
modified territorial tax system that includes a  one-time transition  tax on deemed  repatriated  earnings
of foreign subsidiaries. As a result of  the  Tax Act, the  current year includes  a net reduction  in
consolidated earnings of approximately $84  million, of which $62  million is due to the one-time
repatriation tax and a net $22 million  is related to the remeasurement  of our  U.S. deferred tax assets
at lower enacted corporate tax rates. The impact of  the Tax  Act recognized  this  year may  differ,
possibly materially, due to, among other things, changes  in  interpretations and assumptions the
Company has made, guidance that may be issued and actions  we  may take  as a result  of the Tax Act.
The effects of the Tax Act are further detailed  in Note 10 to the audited  consolidated financial
statements, in Part II, Item 8 of this Annual Report on  Form 10-K.

46

Electronic Brokerage: For the current year, income before income taxes in our  electronic  brokerage
segment increased  $104 million, or 14%, compared  to  the prior  year, driven by higher net interest
income and commissions, partially offset by lower other income and  higher execution  and clearing,
general and administrative, and employee  compensation and  benefits expenses. Net  revenues increased
13%, mainly from a 30% increase in net  interest income,  driven  by higher Federal  Funds rates and
higher average customer credit and margin loan balances,  and a 6%  increase in commissions, primarily
driven by higher options contract and stock share volumes; partially  offset  by  a 16% decrease  in other
income, driven by a $12 million net mark-to-market loss on our U.S. government securities portfolio
(compared to a $26 million net mark-to-market gain in  the prior  year). Pre-tax  profit margin  was 61%
for both the current year and the prior  year. Customer accounts grew 25%, and  customer equity
increased 46% from the prior year. For the  current year, total DARTs  for  cleared and execution-only
customers increased 4% to 688 thousand, compared  to  660 thousand for the prior  year.

Market Making: For the current year, income before  income  taxes in our market making  segment
decreased $71 million, compared to the prior year, to a loss of $27 million. Trading gains decreased
75% on lower trading volumes, as we  wind down our options market making activities. In addition,  the
results for the current year include approximately $25 million in one-time  exit costs,  primarily consisting
of the write-down  of the value of exchange  trading rights, included  in general and  administrative
expenses, and severance costs for employee terminations, included in employee compensation and
benefits expense. These exit costs were partially offset by a $13  million net  recovery of costs  related to
the wind-down of our U.S. options market  making operations included  in other income.

On March 8, 2017, the Company announced  its intention to discontinue its options market making
activities globally. We will continue to access the phase-out of our market making operations  outside of
the U.S  substantially over the coming months. Consistent with  earlier estimates, we recognized
approximately $25 million in one-time restructuring  costs in  the current year. A substantial  portion of
these exit costs is expected to be defrayed  by continuing certain  market  making operations until the
restructuring is complete. In addition, as  a result  of  discontinuing our options market making activities,
we expect that approximately $40 million  in  annual net  expenses will be absorbed by the electronic
brokerage segment, of which approximately $11 million was absorbed during the current year. As of
December 31, 2017, on a prospective  basis, approximately 82%  of  the resources related  to  the
$40 million in annual net expenses have been transferred to the electronic brokerage segment.

We  intend to continue conducting certain  proprietary  trading activities  in stocks  and related instruments
to facilitate our electronic brokerage customers’  trading in products such as ETFs, ADRs, CFDs  and
other financial instruments. However, we do not expect this activity to be of sufficient  size as  to  require
reporting these activities as a separate segment after we discontinue our options market making
activities.

Sale of U.S. Options Market Making Operations:
making operations to Two Sigma Securities, LLC  on  September  29, 2017, during the current year we
recorded  a gain of $11 million and consulting fees of $2 million, reflecting the  recovery of costs  we
incurred during the transition of these operations to Two Sigma  Securities,  LLC. As of the end  of the
current year, we had discontinued nearly all  of  our U.S. and the majority of  our non-U.S. options
market making operations.

In connection with the sale of our U.S.  options  market

Under the agreement with Two Sigma  Securities, LLC, we  have the opportunity for future income from
an earn-out agreement, based on the  performance of  the options market making business under Two
Sigma Securities, LLC’s control. Under the  agreement,  we would earn a share of any U.S.  profits after
variable costs and other agreed-upon  costs for three years; and a separate share of any non-U.S. profits
after variable costs for four years. The agreement provides Two Sigma Securities, LLC the opportunity
to enter non-U.S.  parts of this business and, while it does not preclude us from participating in those
markets, the earn-out would be effective  only  in markets where  we did not compete.

47

Market making, by its nature, does not  produce predictable earnings. Our results in any given period
may be materially affected by volumes in the global  financial markets,  the level  of  competition and
other factors. Electronic brokerage is more  predictable, but it  is dependent  on customer activity, growth
in customer accounts and assets, interest  rates and other factors.  For a  further discussion  of the factors
that may affect our future operating results, please see  the description of risk factors  in Part I,  Item 1A
of this Annual Report on Form 10-K.

The following two tables present net  revenues and income before income  taxes for  each of our business
segments for the periods indicated.

Net revenues of each of our segments  and  our total net revenues are summarized below:

Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,405
86
211

(in millions)
$1,239
190
(33)

$1,097
298
(206)

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,702

$1,396

$1,189

Year Ended December 31,

2017

2016

2015

(1) The corporate segment includes corporate  related activities, inter-segment  eliminations,
and gains and losses on positions held  as part of our overall currency diversification
strategy.

Income before income taxes of each of our segments and our total income before income taxes  are
summarized below:

Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,

2017

2016

2015

(in millions)
$756
44
(39)

$ 860
(27)
216

$ 536
130
(208)

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,049

$761

$ 458

(1) The corporate segment includes corporate  related activities, inter-segment  eliminations,
and gains and losses on positions held  as part of our overall currency diversification
strategy.

Net Revenues

Trading Gains

Trading gains are generated in the normal  course  of our market  making business. Trading  revenues are,
in general, proportional to the trading  activity in the  markets. Trading gains accounted  for
approximately 2%, 12%, and 23% of our total  net revenues for the years ended December 31, 2017,
2016, and 2015, respectively.

Trading gains also include revenues from net dividends. Market making activities require  us to hold a
substantial inventory of equity securities.  We  derive  revenues in the form  of  dividend  income  from
these equity securities. This dividend income is largely offset  by dividend  expense incurred  when we
make payments in lieu of dividends on short positions  in securities in our portfolio. Dividend income
and expense arise from holding market making positions over dates on which dividends are  paid to

48

shareholders of record. When a stock  pays  a dividend, its market price is generally adjusted downward
to reflect the value paid to the shareholders of record, which will  not be received by those who
purchase the stock on or after the ex-dividend date. Hence,  the apparent  gains and losses due to these
price changes must be taken together  with the dividends paid and  received, respectively,  to  accurately
reflect the results of our market making  activities.

As a result of the way we have integrated  our market making  and securities lending systems, our
trading gains and our net interest income from the market making segment are  interchangeable  and
depend  on the mix of market making  positions in our portfolio. When implied  interest  rates in the
equity and equity options and futures markets exceed the  actual interest rates available  to  us, our
market making systems tend to buy stock  and  sell it forward, which  produces higher trading  gains and
lower net interest income. When these rates are inverted, our market making  systems tend to sell  stock
and buy  it forward, which produces lower  trading gains  and higher  net interest income.

Commissions

We  earn commissions from our cleared customers  for  whom we act as an executing and  clearing broker
and from our non-cleared customers for  whom we  act  as an execution-only broker. We  have a
commission structure that allows customers  to  choose  between  an all-inclusive fixed, or ‘‘bundled’’,  rate
and a tiered, or ‘‘unbundled’’, rate that  offers  lower commissions for high volume  customers. For
‘‘unbundled’’ commissions, we pass through regulatory and exchange  fees  separately  from our
commissions, adding transparency to  our fee structure.  Commissions accounted  for 38%,  44%, and 52%
of our total net revenues for the years  ended  December 31, 2017, 2016, and 2015,  respectively.

Our commissions are geographically diversified. In 2017, 2016,  and 2015  we  generated 32%, 30%,  and
26%, respectively, of commissions from  operations conducted internationally.

Interest Income and Interest Expense

We  earn interest on customer funds segregated in safekeeping accounts; on customer  borrowings on
margin, secured by marketable securities these customers hold with  us; from our investments  in U.S.
and foreign government securities; from borrowing and lending securities in the general course of our
brokerage and market making activities;  and on deposits with banks. Interest  income  accounted for
53%, 43%, and 41% of our total net  revenues for  the years ended December 31, 2017, 2016, and 2015,
respectively. Interest income is partially offset by  interest  expense.

We  pay interest on cash balances customers  hold  with us;  for borrowing  and lending  securities in  the
general course of our market making and brokerage activities;  and on our  borrowings. Interest expense
accounted for 13%, 6%, and 6% of our  total net revenues for  the years ended  December 31,  2017,
2016, and 2015, respectively.

We  have automated and integrated our securities lending system  with our trading system. As a result,
we have been able to tailor our securities  lending activity  to produce more  optimal results when  taken
together with trading gains (see description under ‘‘Trading Gains’’  above).

Net interest income accounted for approximately 40%, 38%, and 36%  of our  total net revenues for  the
years ended December 31, 2017, 2016, and 2015, respectively.

Other Income (Loss)

A primary component of other income  (loss)  is foreign  currency gains and losses from our currency
diversification strategy. A discussion  of  our approach to managing foreign currency exposure is
contained in Part II, Item 7A of this Annual Report on Form 10-K entitled ‘‘Quantitative and
Qualitative Disclosures about Market  Risk.’’

49

Other income (loss) also consists of mark-to-market gains and losses on our U.S.  government securities
portfolio; income from market data fees,  account activity fees,  risk exposure  fees  and payments for
order flow; gains and losses on financial instruments  at fair value  and on other financial instruments
that are not held for our market making  activities. In addition, 2017 includes a net gain  on the sale of
the U.S.  options market making operations. Other income (loss)  accounted for approximately 20%, 7%,
and (10%) of our total net revenues  for the  years  ended December 31, 2017,  2016, and  2015,
respectively.

Non-Interest Expenses

Execution and Clearing Expenses

Execution and clearing expenses include the costs of executing  and  clearing our market making and
electronic brokerage trades, as well as  liquidity rebates  received from various  exchanges and market
centers, regulatory fees, market data fees,  and payments for order flow. Execution fees are paid
primarily to electronic exchanges and  market  centers on which  we  trade.  Clearing fees are paid to
clearing houses and clearing agents. Market data  fees  are paid  to  third parties  to  receive streaming
price quotes and related information.  Payments for order flow are paid primarily as  part of  exchange-
mandated programs.

Employee Compensation and Benefits

Employee compensation and benefits include salaries,  bonuses  and  other  incentive compensation plans,
group insurance, contributions to benefit  programs  and other related employee  costs.

Occupancy, Depreciation and Amortization

Occupancy expenses consist primarily  of rental  payments on office  and data center leases  and related
occupancy costs, such as utilities. Depreciation and amortization expenses result  from the depreciation
of fixed assets, such as computing and communications  hardware, as well as amortization of leasehold
improvements, capitalized in-house software development  and acquired  intangible  assets.

Communications

Communications expenses consist primarily  of  the cost of  voice and  data telecommunications lines
supporting our business, including connectivity to exchanges around the world.

General and Administrative and Customer Bad Debt

General and administrative expenses  consist primarily of advertising, professional services expenses,
such as legal and audit work, and other  operating expenses. Customer bad debt expenses consist
primarily of losses incurred by customers in excess of their assets  with us, net of amounts  recovered by
us.

Income Tax Expense

We  pay U.S. federal, state and local income  taxes on our  taxable income, which  is proportional  to  the
percentage we own of IBG LLC. Also, our  subsidiaries are subject to income  tax in  the respective
jurisdictions in which they operate.

Noncontrolling Interest

We  are the sole managing member of IBG  LLC and, as such, operate and control all of the business
and affairs of IBG LLC and its subsidiaries  and  consolidate IBG LLC’s financial results into our
financial statements. As of December 31,  2017, we  held approximately 17.4% ownership interest in

50

IBG LLC. Holdings is owned by the original  members of IBG  LLC and  holds  approximately 82.6%
ownership interest in IBG LLC. We  reflect Holdings’ ownership as a noncontrolling interest in our
consolidated statement of financial condition, consolidated statement of comprehensive income,
consolidated statement of changes in  equity and consolidated  statement  of  cash flows. Our share of
IBG LLC’s net income, excluding Holdings’ noncontrolling interest, for the current  year was
approximately 17.0%, compared to approximately 16.2% for the prior  year.

Certain Trends and Uncertainties

We  believe that our current operations may be favorably or unfavorably  impacted  by  the following
trends  that may affect our financial condition and results  of  operations:

(cid:127) Our market making activities will continue to be impacted  by the following trends until  we

complete its wind-down.

(cid:127) Over the past several years, the effects  of market structure changes, competition  (in

particular, from high frequency traders) and market conditions  have, during certain periods,
exerted downward pressure on bid/offer spreads realized by market makers.

(cid:127) In recent years, in an effort to improve the quality  of their  executions as  well as to increase
efficiencies, market makers have increased the  level of  automation within their  operations,
which may allow them to compete more effectively  with us.

(cid:127) A driver of our market making profits  is the relationship between actual  and implied

volatility in the equities markets. The cost  of  maintaining our conservative risk  profile is
based on implied volatility, while our profitability, in part, is based  on  actual volatility.
Hence, our profitability is increased when actual  volatility runs  above implied volatility and
it is decreased when actual volatility falls  below implied  volatility.  Implied volatility tends to
lag actual volatility.

(cid:127) Retail broker-dealer participation in the equity markets  has fluctuated over the past  few years
due to investor sentiment, market conditions  and a  variety of other  factors.  Retail transaction
volumes may not be sustainable and are  not  predictable.

(cid:127) Scrutiny of equity and option market makers,  hedge  funds  and  soft dollar practices by regulatory
and legislative authorities has increased. New  legislation or modifications  to existing regulations
and rules could occur in the future.

(cid:127) Additional consolidation among market centers may adversely affect the  value of our

SmartRoutingSM software.

(cid:127) Benchmark interest rates have fluctuated over the past years due  to  economic conditions.

Changes in interest rates may not be  predictable.

See ‘‘Risk Factors’’ in Part I, Item 1A of this Annual Report on Form 10-K  for a  discussion of other
risks that may affect our financial condition  and  results of operations.

51

163 $
612
606
94

1,475
79

1,396

269
617
492
(122)

1,256
67

1,189

244
242
51
30
62
6

635

761
62

699
615

231
227
44
25
58
146

731

458
43

415
366

49

0.80

0.78

Results of Operations

The tables in the period comparisons below provide summaries of our  consolidated results  of
operations. The period-to-period comparisons  below  of financial results  are not necessarily indicative of
future results.

Year Ended December 31,

2017

2016

2015

(in millions, except share and per share
amounts)

Revenues

Trading gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Commissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40 $
647
908
332

Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation and benefits . . . . . . . . . . . . . . . . . . . . . .
Occupancy, depreciation  and amortization . . . . . . . . . . . . . . . . . . .
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and  administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer bad debt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total non-interest  expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income before  income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less net income attributable to  noncontrolling interests . . . . . . . . .

1,927
225

1,702

241
249
47
28
86
2

653

1,049
256

793
717

Net income available for common  stockholders . . . . . . . . . . . . . . . . . $

76 $

84 $

Earnings per share

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

1.09 $

1.07 $

1.28 $

1.25 $

Weighted average common shares outstanding

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

69,926,933

66,013,247

61,043,071

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

70,904,921

67,299,413

62,509,796

Comprehensive income

Net income available for common  stockholders . . . . . . . . . . . . . . . $

76 $

84 $

49

Other comprehensive  income
Cumulative translation  adjustment, before  income taxes . . . . . . . . .
Income taxes related to items of other  comprehensive  income . . . . .

Other comprehensive income (loss),  net  of tax . . . . . . . . . . . . . . . .

11
—

11

(4)
—

(4)

Comprehensive income available for  common stockholders . . . . . . . . . $

87 $

80 $

Comprehensive income attributable to  noncontrolling interests

Net income attributable  to noncontrolling  interests . . . . . . . . . . . . . $
Other comprehensive  income—cumulative translation  adjustment

. .

Comprehensive income attributable to  noncontrolling interests . . . . . . $

717 $
54

771 $

615 $
(21)

594 $

(10)
—

(10)

39

366
(53)

313

52

The following table sets forth our consolidated  results of operations as a percent of our total net
revenues for the indicated periods:

Year Ended
December 31,

2017

2016

2015

Revenues

Trading gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2% 12% 23%
38% 44% 52%
53% 43% 41%
7% (10)%
20%

Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

113% 106% 106%
6%
6%
13%

Total net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

100% 100% 100%

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation and benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Occupancy, depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . .
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer bad debt

14% 17% 19%
15% 17% 19%
4%
4%
3%
2%
2%
2%
4%
5%
5%
0% 12%
0%

Total non-interest expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38% 45% 61%

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net Income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less net income attributable to noncontrolling interests . . . . . . . . . . . . . . . . . .

62% 55% 39%
4%
4%
15%
47% 50% 35%
42% 44% 31%

Net income available for common stockholders . . . . . . . . . . . . . . . . . . . . . . . . .

4%

6%

4%

Year Ended December 31, 2017 (‘‘current year’’)  compared to the Year Ended  December 31, 2016

(‘‘prior year’’)

Net Revenues

Total net revenues, for the current year, increased $306 million, or  22%,  compared to the prior year,  to
$1,702 million. The increase in net revenues was primarily due to higher net interest income, other
income and commissions, partially offset by lower trading  gains. Trading volume is an  important  driver
of revenues and costs for both our electronic brokerage and  market  making segments. During  the
current year, our electronic brokerage  options  contract  and  stock share volumes increased 11% and
50% (largely driven by low-priced U.S. and Hong  Kong shares), respectively,  while futures contract
volume decreased 8%, compared to the  prior year.  Market making  trading  volumes were significantly
down as we began to wind down our  market making activities globally during the current  year.

Trading Gains

Trading gains, for  the current year, decreased $123  million,  or  75%, compared  to  the prior year, to
$40 million. Reflecting the wind-down of our options market  making activities during the current year,
our  market making operations executed  31.3 million trades compared to 64.0 million trades executed in
the prior year. In addition, market making  options and futures contract  and stock  share volumes
decreased 67%, 60%, and 45%, respectively, compared to the  prior year.

53

Trading gains were also unfavorably impacted by decreases in volatility and in the  actual-to-implied
volatility ratio as compared to the prior year. Through our announcement on March 8,  2017, the
market making segment had incurred net  losses and the segment  was not expected  to  return  to
meaningful profitability; however, the  rate of continuing losses was substantially reduced after we began
curtailing these activities.
The VIX(cid:3), which measures perceived U.S. equity market volatility, decreased 30% to an  average
of 11.1 for the current year, compared to an  average of 15.9 for the prior year. The ratio of actual to
implied volatility decreased to an average of  60% for  the current  year, compared to an average  of 83%
for the prior year. Both of these were  negative trends for  market  making performance, but had less of
an impact in the current year than in the  prior year as we curtailed our market making activities.

Included in trading gains are net dividends. Dividend  income and expense arise from  holding  market
making positions over dates on which dividends are paid to shareholders  of record.  When a stock pays
a dividend, its market price is generally adjusted downward to reflect the  value paid,  which will not be
received by those who purchase stock on or  after the ex-dividend date. Hence, the  apparent gains  and
losses due to  these price changes, reflecting  the value of dividends paid to shareholders, must be taken
together with the dividends paid and received, respectively, to accurately  reflect  the results  of  our
market making activities.

Commissions

Commissions, for the current year, increased $35 million, or 6%, compared to the  prior year, to
$647 million, driven by higher customer  trading  volumes in  options and stocks, continued customer
account growth and higher average commission  per  customer order. Cleared customer  options  contract
and stock share volumes increased 11%  and  51%, respectively, while futures contract  volume decreased
9%, compared to the prior year. Total  DARTs  for  cleared and execution-only  customers, for the current
year, increased 4% to 688 thousand, compared  to  660 thousand for the prior year.  DARTs for cleared
customers, i.e., customers for whom we  execute trades, as well as, clear  and carry  positions,  for the
current year, increased 5% to 639 thousand, compared to 609  thousand for  the prior year. Average
commission per DART for cleared customers,  for  the current year,  increased by 1% to $3.97, compared
to $3.92 for the prior year, reflecting  larger average order sizes  in stocks.

Interest Income and Interest Expense

Net interest income (interest income  less interest expense),  for the  current year, increased $156 million,
or 30%, compared to the prior year, to $683  million.  The  increase in  net interest  income  was driven by
higher  average customer credit and margin loan balances and higher  benchmark interest rates.

Net interest income on customer balances,  for the  current year, increased $141  million, compared to
the prior year, driven by a $5.5 billion increase in average customer credit balances, a portion  of  which
were invested in interest-bearing U.S. government securities, a $6.8 billion increase in  average customer
margin loans, and a 61 basis point increase in the average Federal Funds effective  rate to 1.00%,
compared to the prior year. As a result of the  increases in the  Federal Funds effective rate since
December 2016, interest expense on customer credit balances increased  from the prior year, in  part, as
certain customer credit balances that  were not eligible  to  earn interest in the  prior year became eligible
to earn interest in the current year. The  increase in benchmark  rates also drove higher interest income
earned on the investment of customer segregated  cash and on margin lending  to  customers.

We  earn income on securities loaned  and  borrowed to support  customer long  and short stock holdings
in margin accounts. In addition, our Stock Yield Enhancement  Program provides an opportunity for
customers with fully-paid stock to allow  us  to  lend  it  out. We pay customers  a rebate on the cash
collateral generally equal to 50% of the  income we earn from lending the  shares. We place cash
collateral securing the loans in the customer’s  account.

54

In the current year, average securities borrowed decreased 5%,  to  $4.0 billion and average securities
loaned increased 35%, to $3.9 billion, compared  to  the prior year. Net  interest earned from securities
lending is also affected by the level of demand for  securities positions  held by our customers and  in our
market making business. During the current year,  net fees earned by our  electronic  brokerage and
market making segments from securities lending  transactions increased $5 million, or  3%, compared to
the prior year. The increase in net interest  income  from securities  lending  transactions was attributable
to the electronic brokerage segment.  It should be noted that securities lending transactions entered into
to support customer activity may produce  interest income (expense) that is offset by interest expense
(income) related to customer balances.

The Company measures return on interest-earning assets  using  net interest margin (‘‘NIM’’). NIM is
computed by dividing the annualized net  interest income by the average  interest-earning assets for  the
period. Interest-earning assets consist of cash  and securities segregated for regulatory purposes
(including U.S. government securities  and  securities purchased under agreements to resell), customer
margin loans, securities borrowed and  other interest-earning assets (solely  firm  assets).

The following table presents net interest income information corresponding to interest-earning assets
and interest-bearing liabilities for the three years ended December 31,  2017, 2016 and 2015:

Year Ended December 31,

2017

2016

2015

(in millions)

Average interest-earning assets

Segregated cash and securities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer margin loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities borrowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other interest-earning assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$23,824
23,289
3,964
2,930

$24,134
16,506
4,155
2,495

$18,314
17,247
3,511
2,004

$54,007

$47,290

$41,076

Average interest-bearing liabilities

Customer credit balances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities loaned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$45,515
3,917

$39,980
2,897

$34,276
3,000

$49,432

$42,877

$37,276

Net Interest income

Segregated cash and securities, net . . . . . . . . . . . . . . . . . . . . . . . . .
Customer margin loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities borrowed and loaned, net . . . . . . . . . . . . . . . . . . . . . . . .
Customer credit balances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other net interest income(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

226
392
161
(123)
32

$

149
217
156
(12)
17

$

68
199
149
(11)
20

Net interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

688

$

527

$

425

Net interest margin (‘‘NIM’’) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.27%

1.11%

1.03%

Annualized Yields

Segregated cash and securities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer margin loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer credit balances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.95%
1.68%
0.27%

0.62%
1.31%
0.03%

0.37%
1.15%
0.03%

(1) Includes income from financial instruments which  has the same characteristics  as interest, but is

reported in other income.

55

Other Income

Other income, for the current year, increased $238  million,  or  253%, compared  to  the prior year, to
$332 million, mainly driven by a gain  of  $110 million from  our  currency diversification  strategy for the
current year, compared to a loss of $40  million for the prior year,  a  gain of $93  million  from the
remeasurement of our Tax Receivable  Agreement liability, payable to Holdings, as a  result of the Tax
Act, and a $13 million recovery of costs  related to the  wind-down  of our  U.S. options market making
operations, partially offset by a $12 million  net mark-to-market loss on our U.S.  government securities
portfolio in the current year, compared  to  $26 million  net mark-to-market gain in the  prior year.
Despite an increase in average medium term interest rates  during the current year,  the net
mark-to-market loss on our U.S. government securities  portfolio was only $12 million, reflecting a
reduction in the size and average duration  of  the portfolio. In general, mark-to-market  gains and  losses
on U.S. government securities are expected to reverse when, as intended, these securities  are held to
maturity. A discussion of our approach to managing foreign  currency exposure is  contained in Part II,
Item 7A of this Annual Report on Form  10-K entitled  ‘‘Quantitative  and Qualitative Disclosures about
Market Risk.

Non-Interest Expenses

Non-interest expenses, for the current  year, increased $18 million, or 3%, compared to the  prior year,
to $653 million, mainly due to a $24 million  increase in general and administrative  expenses and a
$7 million increase in employee compensation and benefits,  partially offset by a $4 million  decrease in
occupancy expenses and a $4 million  decrease in  customer bad debt, compared to the  prior year. As a
percentage of total net revenues, non-interest expenses were 38% for the current year and 45% for the
prior year.

Execution and Clearing

Execution and clearing expenses, for the  current year, decreased $3 million, or 1%, compared to the
prior year, to $241 million, driven by  lower trading volume  in our market making segment as we began
to wind down our market making activities globally. Market  making options and  futures contract and
stock share volumes decreased 67%,  60%  and 45%,  respectively, from  the prior year. This was largely
offset by higher execution and clearing  expenses in  our  electronic brokerage  segment, where  customer
options contract and stock share volumes increased 11% and  50%,  respectively. In addition, the
electronic brokerage segment received lower liquidity rebates from exchanges operating a make-or-take
pricing model, in which we are paid  for adding liquidity and charged for removing  liquidity, as trading
volume shifted away from orders that  added  liquidity  to  orders that  removed  liquidity in the  current
year compared to the prior year.

Employee Compensation and Benefits

Employee compensation and benefits expenses, for the  current year, increased $7 million, or  3%,
compared to the prior year, to $249 million, mainly due to one-time exit costs related to the wind-down
of our options market making activities  and  a 5% increase in the average number  of  employees to
1,213, for the current year, compared to 1,154  for the  prior year. Within the operating business
segments, we continued to add staff in  customer service, legal and compliance, and  software
development to support electronic brokerage and reduce staff in market making. As we  continue to
grow, our focus on automation has allowed  us  to  maintain a relatively  small staff.  As a  percentage of
total net revenues, employee compensation and benefits  expenses were 15%  for the  current year and
17% for the prior year.

56

Occupancy, Depreciation and Amortization

Occupancy, depreciation and amortization  expenses, for the current year, decreased  $4 million, or 8%,
compared to the prior year, to $47 million, mainly due to lower  office rent expenses and  equipment
related costs. As a percentage of total net  revenues, occupancy, depreciation and amortization expenses
were 3% for the current year and 4% for  the prior year.

Communications

Communications expenses, for the current year,  decreased  $2 million, or 7%,  compared to the prior
year, to $28 million, mainly due to lower costs of data lines to exchanges during the current year as we
wound down our market making activities. As  a percentage of total net revenues, communications
expenses were 2% for both the current year and the prior  year.

General and Administrative

General and administrative expenses,  for the  current year, increased $24  million, or  39%, compared  to
the prior year, to $86 million, mainly  due to a $21 million write-down of the  value of  exchange trading
rights related to the wind-down of our  U.S. options market making operations and  higher advertising
expenditures. As a percentage of total  net  revenues, general and administrative  expenses were 5%  for
the current year and 4% for the prior  year.

Customer Bad Debt

Customer bad debt expense, for the current year, decreased $4  million, or  67%, compared  to  the prior
year, to $2 million.

Income Tax Expense

Income tax expense, for the current year,  increased $194  million, or 313%, to $256 million, compared
to the prior year, primarily due to the effects  of the Tax Act, which  was  enacted on December  22, 2017.
The Tax Act significantly revised U.S. corporate income tax law by, among other things, reducing the
corporate income tax rate from 35% to 21% and implementing a modified territorial tax  system that
includes a one-time transition tax on  deemed repatriated  earnings of foreign  subsidiaries.  See  Note 10
to the audited consolidated financial statements, in Part  II,  Item 8 of this  Annual Report on
Form 10-K.

As a result of the Tax Act, the current year  results include a net reduction  of approximately  $84 million
related to the following: (1) the one-time  transition tax on deemed repatriation  of  earnings on some  of
our  foreign subsidiaries resulted in an  additional  income  tax  expense of $62  million,  to  be  paid over an
eight-year period, (2) the remeasurement  of  deferred tax assets and  liabilities  at the reduced corporate
income tax rate of 21% resulted in additional income tax expense of $115 million, and (3)  in
connection with the remeasurement of  our deferred tax asset arising from the acquisition of  interests in
IBG LLC, we also remeasured the related Tax Receivable  Agreement liability, payable to Holdings,
resulting in the recognition of a $93 million  gain, which  is reported in  other income in the consolidated
statements of comprehensive income  (see Note  4 to the audited  consolidated financial  statements in
Part II, Item 8 of this Annual Report on Form 10-K).

57

The following table presents information about our  income tax expense  for  the three years ended
December 31, 2017, 2016 and 2015.

Consolidated

Consolidated income before income taxes . . . . . . . . . . . . . . . . . . . . . . .
IBG, Inc. stand-alone income before  income  taxes . . . . . . . . . . . . . . . .
Gains (losses) on the Company’s common stock  held  by  Operating

Year Ended December 31,

2017

2016

2015

(in millions, except %)

$1,049

92(1)

$ 761
(1)

$ 458
—

Companies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—

(1)

4

Operating Companies income before  income  taxes . . . . . . . . . . . . . . .

$ 957

$ 761

$ 462

Operating Companies

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense—effect of the Tax Act . . . . . . . . . . . . . . . . . . . . . .

Net income available to members . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 957
31
62

$ 864

$ 761
30
—

$ 731

$ 462
25
—

$ 437

IBG, Inc.

Average ownership percentage in IBG LLC . . . . . . . . . . . . . . . . . . . . .

17.0% 16.2% 15.1%

Net income available to IBG, Inc. from  Operating  Companies . . . . . . . .
IBG, Inc. stand-alone income before  income  taxes . . . . . . . . . . . . . . . .

$ 147

92(1)

$ 117
(1)

$ 67
—

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense—effect of the Tax Act . . . . . . . . . . . . . . . . . . . . . .

Net income available to common stockholders . . . . . . . . . . . . . . . . . .

Consolidated income tax expense

Income tax expense attributable to Operating Companies . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
Income tax expense attributable IBG, Inc.

239

48
115

76

93
163

$

$

Consolidated income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 256

116

32
—

67

18
—

$ 84

$ 49

$ 30
32

$ 62

$ 25
18

$ 43

Consolidated effects of the Tax Act

One-time repatriation tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remeasurement of U.S. deferred tax assets . . . . . . . . . . . . . . . . . . . . . .
Remeasurement of liability under the Tax  Receivable  Agreement . . . . . .

$

62
115
(93)

$ — $ —
—
—

—
—

Total decrease in earnings resulting from the  Tax Act . . . . . . . . . . . . .

$

84

$ — $ —

(1) Includes a $93 million gain from the remeasurement of the  Tax Receivable  Agreement liability as a

result of the Tax Act, included in other income.

Our operating results, for the current year, excluding  the effects of our currency diversification strategy,
the net mark-to-market gains and losses from our  U.S. government securities  portfolio,  the one-time
net costs related to the wind-down of  our  options market making  activities, and the remeasurement
gain on our Tax Receivable Agreement  liability  due to the Tax Act, compared to the prior year,  were as
follows: net revenues were $1,500 million, up  6%;  non-interest expenses were $628 million, down 1%;
income before income taxes was $872  million, up 13%; and  pre-tax  profit margin  increased  to  58% for
the current year, from 55% for the prior year.

58

Year Ended December 31, 2016 compared  to the Year Ended December 31,  2015

Net Revenues

Total net revenues, in 2016, increased $207 million, or 17%,  compared to 2015,  to  $1,396 million. The
increase in net revenues was primarily due  to  higher other  income  (driven  by  lower losses on our
currency diversification strategy and net  mark-to-market  gains on  our U.S. government securities
portfolio), and net interest income; partially offset  by lower trading gains and commissions.  Trading
volume is an important driver of revenues  and costs  for both  our electronic brokerage and market
making segments. During 2016, our futures  contract volume increased 2%, while  options  contract and
stock share volumes each decreased  10%, compared  to  2015.

Trading Gains

Trading gains, in 2016, decreased $106 million,  or 39%, compared to 2015, to $163 million. As market
makers, we provide liquidity by buying from sellers and selling  to  buyers.  During 2016,  our market
making operations executed 64.0 million  trades compared to  65.9 million trades executed in  2015.
Market making options and futures contract and stock  share volumes decreased 8%, 5%,  and 15%,
respectively, compared to 2015.

Trading gains were unfavorably impacted by  lower trading volumes, a divergence in price  behavior
among a significant number of individual  stocks during the  first quarter  of 2016, and decreases  in
volatility and in the actual-to-implied volatility ratio as compared to 2015. The VIX(cid:3), which measures
perceived U.S. equity market volatility, decreased 5%  to  an average of 15.9  in 2016, compared to an
average of 16.7 in 2015. The ratio of actual to implied  volatility decreased to an average of  83% in
2016, compared to an average of 88%  in  2015.

Included in trading gains are net dividends.  Dividend income and expense arise from  holding  market
making positions over dates on which dividends are paid  to shareholders  of record.  When a stock pays
a dividend, its market price is generally adjusted downward to reflect the  value paid,  which will not be
received by those who purchase stock on or after  the ex-dividend date. Hence, the  apparent gains  and
losses due to  these price changes, reflecting the value of  dividends paid to shareholders, must be taken
together with the dividends paid and received, respectively, to accurately  reflect  the results  of  our
market making operations.

Commissions

Commissions, in 2016, decreased $5 million,  or 1%, compared to 2015, to  $612 million, driven by mixed
customer trading volumes and lower average commission per customer order,  but moderated by
continued customer account growth.  Cleared  customer options contract and stock share  volumes
decreased 7% and 10%, respectively,  while  futures  contract volume increased 3%, compared to 2015.
Total DARTs for cleared and execution-only customers, in 2016, increased 2% to 660  thousand,
compared to 647 thousand during 2015.  DARTs for cleared customers, i.e., customers for  whom  we
execute trades, as well as, clear and carry positions,  in 2016, increased 3% to 609  thousand, compared
to 589 thousand in 2015. Average commission per DART  for cleared customers,  in 2016, decreased by
4% to $3.92, compared to $4.07 in 2015,  reflecting smaller  average  order sizes across most  product
types.

Interest Income and Interest Expense

Net interest income (interest income  less interest expense),  in 2016, increased $102  million, or  24%,
compared to 2015, to $527 million. The increase in net  interest income  was driven  by  higher customer
cash balances and higher net fees earned from securities lending transactions.

59

Net interest income on customer balances,  in 2016, increased $100  million, compared to 2015, driven by
a $5.3 billion increase in average customer  cash  balances,  the majority of  which were invested in
interest-bearing U.S. government securities,  while average  customer margin  borrowings decreased
$1.5 billion. In addition, the average  Fed  Funds effective rate increased by approximately 26 basis
points to 0.39% in 2016, compared to 2015.

We  earn income on securities loaned  and  borrowed to support  customer long  and short stock holdings
in margin accounts. In addition, our Stock Yield Enhancement  Program provides an opportunity for
customers with fully-paid stock to allow  us  to  lend  it  out. We pay customers  a rebate on the cash
collateral generally equal to 50% of the  income we earn from lending the  shares. We place cash
collateral securing the loans in the customer’s  account.

In the market making segment, as a  result  of the way  we have integrated our market making and
securities lending systems, our trading  income and our net  interest income are interchangeable and
depend  on the mix of market making  positions in our portfolio. When implied  interest  rates in the
equity and equity options and futures markets exceed the  actual interest rates available  to  us, our
market making systems tend to buy stock  and  sell it forward, which  produces higher trading  gains and
lower net interest income. When these rates are inverted, our market making  systems tend to sell  stock
and buy  it forward, which produces lower  trading gains  and higher  net interest income.

In 2016, average securities borrowed  increased by 19%, to $4.2  billion and average securities loaned
decreased by  3%, to $2.9 billion, compared to 2015. Net interest  earned from securities lending is also
affected by the level of demand for securities positions  in our market making business and held by our
customers. During 2016, net fees earned  by our electronic  brokerage and market making  segments from
securities lending transactions increased $6 million or 4%,  compared to 2015.  The  increase in net
interest income from securities lending  transactions was attributable to the market making segment.

Other Income

Other income, in 2016, increased $216  million,  to  $94 million, compared to a  loss of $122 million  in
2015, mainly driven by $166 million lower losses  on our currency diversification strategy (loss of
$40 million in 2016, compared to a loss  of $206 million in 2015),  and $26 million net mark-to-market
gains on our U.S. government securities  portfolio  in 2016,  compared to $33 million net mark-to-market
losses in 2015 due to a decline in average medium  term interests rates during 2016;  partially  offset by
the non-recurrence of an $18 million  gain from hedging activities related to the  Swiss franc event in
2015. In general, mark-to-market gains and losses on U.S. government securities are expected  to
reverse  when, as intended, these securities  are held to maturity. A discussion of  our approach to
managing foreign currency exposure is contained in  Part II,  Item  7A of this Annual Report on
Form 10-K entitled ‘‘Quantitative and  Qualitative Disclosures about Market Risk.

Non-Interest Expenses

Non-interest expenses, in 2016, decreased $96 million, or 13%,  compared to 2015,  to  $635 million,
mainly due to the non-recurrence of  $137 million in customer  bad debt  expense due to the Swiss franc
event in 2015, as described above; partially  offset by higher  execution and clearing  expenses and fixed
expenses. As a percentage of total net revenues, non-interest expenses were  45% in 2016  and 61% in
2015.

Execution and Clearing

Execution and clearing expenses, in 2016,  increased $13  million, or 6%, compared  to  2015, to
$244 million, driven by higher trading  volume in futures in the electronic  brokerage segment  and a
reduction in liquidity rebates from exchanges  operating a make-or-take pricing model, in  which we are
paid for adding liquidity and charged  for removing  liquidity, as the options trading volume  shifted away
from orders that added liquidity to orders that removed liquidity in  2016 compared to 2015.

60

Employee Compensation and Benefits

Employee compensation and benefits expenses, in 2016, increased $15 million, or  7%, compared to
2015, to $242 million, mainly due to an  11% increase  in the number of employees  to  1,204, compared
to 1,087 as of December 31, 2015. Within the  operating business segments, we continued to add staff in
customer service, legal and compliance,  and software  development to support electronic brokerage and
reduce staff in market making. As we  continue  to  grow,  our focus  on  automation has  allowed  us  to
maintain a relatively small staff. As a percentage of total  net revenues, employee compensation and
benefits expenses were 17% in 2016 and 19% in 2015.

Occupancy, Depreciation and Amortization

Occupancy, depreciation and amortization  expenses, in  2016, increased $7 million, or 16%,  compared to
2015, to $51 million, mainly due to higher office rent  expenses during 2016  as we  continue to increase
the number of employees and expand into other regions. As  a  percentage  of  total net revenues,
occupancy, depreciation and amortization expenses were 4% for both  2016 and 2015.

Communications

Communications expenses, in 2016, increased $5 million, or  20%,  compared to 2015,  to  $30 million,
mainly due to higher costs of data lines  to exchanges during 2016.  As a percentage of total net
revenues, communications expenses were  2% for  both 2016 and 2015.

General and Administrative

General and administrative expenses,  in 2016, increased $4  million, or 7%, compared  to  2015, to
$62 million, mainly due to higher professional  services fees and  expenses related  to  legal and regulatory
matters. As a percentage of total net revenues,  general and administrative expenses  were 4% in 2016
and 5% in 2015.

Customer Bad Debt

Customer bad debt expense, in 2016, decreased $140 million, or 96%, compared  to  2015, to $6 million,
primarily due to the non-recurrence of unsecured  customer losses  of  $137 million caused by the sudden
move in the value of the Swiss franc  in 2015, as  described below.

Sudden Move in the Value of the Swiss  Franc

On January 15, 2015, in an unprecedented  action, the Swiss National Bank removed  a previously
instituted and repeatedly confirmed cap of the currency relative to the euro, causing a sudden  move in
the value of the Swiss franc. Several  of our customers  holding  currency futures and spot positions
suffered losses in excess of their deposits with us. We  took immediate action to hedge  our  exposure to
the foreign currency receivables from these customers.  As of December 31,  2017, we  have incurred
cumulative losses, net of hedging activity and debt collection  efforts, of $116  million. We continue  to
actively pursue collection of the debts. The ultimate  effect of this  incident on  our  results will depend
upon the outcome of our debt collection  efforts.

Income Tax Expense

Income tax expense, in 2016, increased  $19  million, or  44%, to $62 million, compared to 2015, as
income before taxes increased $303 million, or 66%,  during the same  period.

Our operating results, in 2016, excluding  the effects of our currency  diversification strategy, the net
mark-to-market gains and losses from  our U.S. government  securities portfolio and the Swiss franc
related customer losses in 2015 were as  follows:  net revenues  were $1,410 million, unchanged from
2015; non-interest expenses were $635 million, up 7%; income  before  income taxes was $775 million,
down 5%; and pre-tax profit margin  decreased to 55% in 2016, from 58% in 2015.

61

Trading Volumes and Brokerage Statistics

The following tables present historical  trading volumes  and brokerage statistics for our  business.
However, volumes are not the only drivers in our  business.

TRADE VOLUMES:
(in 000’s, except %)

Period

2013 . . . . . . . .
2014 . . . . . . . .
2015 . . . . . . . .
2016 . . . . . . . .
2017 . . . . . . . .

Market
Making
Trades

65,320
64,530
65,937
64,038
31,282

%
Change

Brokerage
Cleared
Trades

%
Change

Brokerage
Non
Cleared
Trades

%
Change

Total
Trades

%
Change

Avg. Trades
per U.S.
Trading Day

173,849
(1)% 206,759
2% 242,846
(3)% 259,932
(51)% 265,501

18,489
19% 18,055
17% 18,769
7% 16,515
2% 14,835

257,658
(2)% 289,344
4% 327,553
(12)% 340,485
(10)% 311,618

1,029
1,155
12%
1,305
13%
4%
1,354
(8)% 1,246

CONTRACT AND SHARE VOLUMES:
(in 000’s, except %)

TOTAL

Period

Options
(contracts)

%
Change

Futures(1)
(contracts)

%
Change

Stocks
(shares)

%
Change

2013 . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . .
2017 . . . . . . . . . . . . . . . . . . . . . . . . . .

659,673
631,265
634,388
572,834
395,885

121,776
(4)% 123,048
0% 140,668
(10)% 143,287
(31)% 124,123

95,479,739
1% 153,613,174
14% 172,742,520
2% 155,439,227
(13)% 220,247,921

61%
12%
(10)%
42%

MARKET MAKING

Period

Options
(contracts)

%
Change

Futures(1)
(contracts)

%
Change

Stocks
(shares)

%
Change

2013 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2017 . . . . . . . . . . . . . . . . . . . . . . . . . . .

404,490
344,741
335,406
307,377
102,025

18,184
(15)% 15,668
(3)% 14,975
(8)% 14,205
(67)% 5,696

12,849,729
(14)% 12,025,822
(4)% 15,376,076
(5)% 13,082,887
(60)% 7,139,622

(6)%
28%
(15)%
(45)%

BROKERAGE TOTAL

Period

Options
(contracts)

%
Change

Futures(1)
(contracts)

%
Change

Stocks
(shares)

%
Change

2013 . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . .
2017 . . . . . . . . . . . . . . . . . . . . . . . . . .

255,183
286,524
298,982
265,457
293,860

103,592
12% 107,380
4% 125,693
(11)% 129,082
11% 118,427

82,630,010
4% 141,587,352
17% 157,366,444
3% 142,356,340
(8)% 213,108,299

71%
11%
(10)%
50%

(1) Futures contract volume includes  options  on futures.

62

BROKERAGE CLEARED

Period

Options
(contracts)

%
Change

Futures(1)
(contracts)

%
Change

Stocks
(shares)

%
Change

2013 . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . .
2017 . . . . . . . . . . . . . . . . . . . . . . . . . .

180,660
225,662
244,356
227,413
253,304

101,732
25% 106,074
8% 124,206
(7)% 128,021
11% 116,858

78,829,785
4% 137,153,132
17% 153,443,988
3% 138,523,932
(9)% 209,435,662

74%
12%
(10)%
51%

(1) Futures contract volume includes  options  on futures.

BROKERAGE STATISTICS:
(in 000’s, except % and where noted)

4Q2017

4Q2016

% Change

Year over Year

Total Accounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer Equity (in billions)(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

483
$124.8

385
$ 85.5

Cleared DARTs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Customer DARTs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

681
730

591
640

Cleared Customers (in $’s, except DART per  account)

Commission per DART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DART per Avg. Account (Annualized) . . . . . . . . . . . . . . . . . . . . . . . . .
Net Revenue per Avg. Account (Annualized) . . . . . . . . . . . . . . . . . . . .

$ 3.92
363
$3,318

$ 4.01
394
$3,205

25%
46%

15%
14%

(2)%
(8)%
4%

(1) Excludes non-customers.

Business  Segments

The following sections discuss the results of our operations  by business  segment, excluding a  discussion
of corporate segment income and expense. In the  following  tables, revenues  and expenses directly
associated with each business segment are included in determining income before  income  taxes. Due to
the integrated nature of the business  segments, estimates and judgments have been made in allocating
certain revenue and expense items. Transactions between business  segments generally result  from one
subsidiary facilitating the business of  another  subsidiary  through the use of its existing trading
memberships and clearing arrangements.  In such  cases, certain revenue and expense items are
eliminated to accurately reflect the external  business conducted in each  business  segment. Rates on
transactions between business segments are designed  to  approximate full costs. In addition  to  execution
and clearing expenses, which are the  main cost driver  for both  the market making and the electronic
brokerage segments, each business segment’s operating  expenses include: (i)  employee compensation
and benefits expenses that are incurred directly in support  of each business segment, (ii) general  and
administrative expenses, which include  directly incurred  expenses for property leases,  professional  fees,
travel and entertainment, communications and information services, equipment, and (iii) indirect
support costs (including compensation  and other related operating expenses) for  administrative services
provided by corporate segment subsidiaries. Such administrative services include, but are not limited to,
computer software development and  support,  accounting, tax, legal and facilities management.

63

Electronic Brokerage

The following table sets forth the results  of  our electronic brokerage  operations  for the  indicated
periods:

Year Ended December 31,

2017

2016

2015

(in millions)

Revenues

Commissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 648
829
108

1,585
180

1,405

$ 613
537
128

1,278
39

1,239

$ 618
431
79

1,128
31

1,097

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation and benefits . . . . . . . . . . . . . . . . . . . . . . . . . . .
Occupancy, depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . .
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer bad debt

Total non-interest expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

210
122
18
15
178
2

545

181
113
21
14
148
6

483

160
97
16
12
130
146

561

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 860

$ 756

$ 536

Year Ended December 31, 2017 (‘‘current year’’)  compared to the Year Ended  December 31, 2016

(‘‘prior year’’)

Electronic brokerage total net revenues, for the  current year, increased $166 million, or  13%, compared
to the prior year, to $1,405 million, primarily  due to higher net interest income and commissions,
partially offset by lower other income.

Commissions, for the current year, increased $35 million, or 6%, compared to the  prior year, to
$648 million, driven by higher customer  trading  volumes in  options and stocks, continued customer
account growth, and higher average commission  per  customer order. Cleared customer  options  contract
and stock share volumes increased 11%  and  51%, respectively, while futures contract  volume decreased
9%, compared to the prior year. Total  DARTs  for  cleared and execution-only  customers, for the current
year, increased 4% to 688 thousand, compared  to  660 thousand for the prior year.  DARTs for cleared
customers, i.e., customers for whom we  execute trades, as well as, clear  and carry  positions,  for the
current year, increased 5% to 639 thousand, compared to 609  thousand for  the prior year. Average
commission per DART for cleared customers,  for  the current year,  increased 1% to $3.97, compared to
$3.92 for the prior year, reflecting larger average order sizes  in stocks.

Net interest income, for the current year,  increased  $151 million, or 30%, compared to the prior  year,
to $649 million driven by a $5.5 billion  increase in average customer credit balances,  a portion of which
were invested in interest-bearing U.S. government securities, a $6.8 billion increase in  average customer
margin loans, and a 61 basis point increase in the average Federal Funds effective  rate to 1.00%.  As  a
result of increases in the Federal Funds effective rate  since December 2016, interest expense  on
customer credit balances increased from the  prior year, in part, as certain customer  credit balances  that
were not eligible to earn interest in the prior year became eligible  to  earn interest in the  current year.
The increase in benchmark rates also  drove higher interest  income earned on  investment of customer
segregated cash and on margin lending to customers.

64

Other income, for the current year, decreased $20 million, or 16%, compared to the  prior year, to
$108 million, mainly driven by a $12 million net mark-to-market loss on our U.S. government  securities
portfolio in the current year, compared  to  a $26 million net mark-to-market gain in the prior year,
partially offset by higher exposure fee  and market data fee income. Despite  an increase in  average
medium term interest rates during the  current year  the net mark-to-market loss on  our U.S.
Government securities portfolio was  only $12  million, reflecting  a  reduction  in the size and  average
duration of the portfolio. In general,  mark-to-market  gains and losses on  U.S. government securities
are expected to reverse when, as intended, these securities are held to maturity.

Non-interest expenses, for the current  year, increased $62 million, or 13%, compared to the  prior year,
to $545 million. Within non-interest expenses, execution  and  clearing expenses increased  $29 million, or
16% driven by higher trading volumes  in options  and  stocks  and a reduction in liquidity rebates  from
exchanges operating a make-or-take  pricing model, in which we are paid for adding liquidity  and
charged for removing liquidity, as the options trading volume  shifted away  from orders that added
liquidity to orders that removed liquidity  in the current year.  A  10%  increase in the  number of
employees providing services to the electronic  brokerage segment  led  to  increased employee
compensation and benefits expenses  of $9  million, or 8%  and increased general and administrative
expenses of $30 million, where the latter includes software development provided by the corporate
segment on a consulting basis, which  accounted for $18 million of this increase. In addition,  general
and administrative expenses for the current  year include higher advertising expenditures and
professional services fees, compared  to  the  prior year. As  a percentage of  total net revenues,
non-interest expenses were 39% for both the  current year and the prior year.

Income before income taxes, for the  current year, increased $104  million, or  14%, compared  to  the
prior year, to $860 million. As a percentage of total net  revenues  for the  electronic brokerage segment,
income before income taxes was 61%  for both  the current year  and the prior year.

Electronic brokerage operating results, for the current year, excluding the  net mark-to-market gains and
losses from our U.S. government securities portfolio, compared to the prior year were as follows: net
revenues  were  $1,417  million,  up  17%;  income  before  income  taxes  was  $872  million,  up  19%;  and
pre-tax profit margin increased to 62% for the current year  from 60% for the  prior year.

Year Ended December 31, 2016 compared  to the Year Ended December 31,  2015

Electronic brokerage total net revenues, in 2016, increased $142 million, or  13%, compared to 2015, to
$1,239 million, primarily due to higher net  interest income  and other  income.

Commissions, in 2016, decreased $5 million, or 1%,  compared to 2015, to  $613 million, driven by mixed
customer trading volumes and lower average commission per customer order,  but moderated by
continued customer account growth.  Cleared customer  options contract and stock share  volumes
decreased 7% and 10%, respectively,  while futures contract volume increased 3% compared to 2015.
Total DARTs for cleared and execution-only customers, in  2016, increased 2% to 660  thousand,
compared to 647 thousand during 2015.  DARTs for  cleared customers, i.e., customers for  whom  we
execute trades, as well as, clear and carry positions, in  2016, increased 3% to 609  thousand, compared
to 589 thousand in 2015. Average commission  per  DART for cleared customers,  in 2016, decreased 4%
to $3.92, compared to $4.07 in 2015,  reflecting smaller  average order sizes across  product types.

Net interest income, in 2016, increased $98 million, or 25% compared  to  2015, to $498  million. The
increase in net interest income was attributable to higher net customer  interest of $100 million, driven
by a $5.3 billion increase in average customer  cash  balances, the majority  of  which were invested in
interest-bearing U.S. government securities,  while average  customer margin  borrowings decreased  by
$1.5 billion. In addition, the average  Fed  Funds effective rate increased by approximately 26 basis
points to 0.39% in 2016, compared to 2015.

65

Other income, in 2016, increased $49  million,  or 62%, compared to 2015, to $128 million, mainly
driven by $26 million net mark-to-market  gains on  our  U.S. government securities  portfolio  compared
to $33 million net mark-to-market losses in  2015 due to a decline in  average medium-term interest
rates, partially offset by the non-recurrence  of an $18  million gain from hedging  activities related  to  the
Swiss franc event in 2015. In general,  mark-to-market gains and losses on U.S. government securities
are expected to reverse when, as intended, these securities are held to maturity.

Non-interest expenses, in 2016, decreased $78 million, or 14%,  compared to 2015,  to  $483 million,
mainly due to a decrease in bad debt expense of $140  million, or 96%, compared  to  2015, to
$6 million, on the non-recurrence of $137 million  in customer bad debt expense related  to  the Swiss
franc event in 2015. Within non-interest expenses,  execution and clearing expenses increased
$21 million, or 13%, driven by higher trading volume in futures and a reduction in liquidity  rebates
from exchanges operating a make-or-take  pricing model, in  which we are paid for  adding liquidity and
charged for removing liquidity, as the options trading volume  shifted away  from orders that added
liquidity to orders that removed liquidity  in 2016 compared  to  2015. A 16% increase in the number of
employees providing services to the electronic  brokerage segment  led  to  increased employee
compensation and benefits expenses  of $16 million, or 16%,  and in general  and administrative expenses
of $18  million, where the latter includes  software development provided by the corporate segment on a
consulting basis. In addition, general and administrative expenses in 2016  include higher professional
fees and expenses related to legal and regulatory matters, compared to 2015. As a percentage  of total
net revenues, non-interest expenses were  39%  in 2016 and 51% in 2015.

Income before income taxes, in 2016, increased $220  million, or 41%, compared  to  2015, to
$756 million. As a percentage of total net  revenues for  the electronic brokerage segment, income
before income taxes was 61% in 2016 and 49% in 2015.

Electronic brokerage operating results, for 2016,  excluding the net mark-to-market gains  and losses
from our U.S. government securities portfolio and  the Swiss franc related  customer losses  in 2015 were
as follows: net revenues were $1,213 million,  up 9%; non-interest expenses were $483  million up 14%;
income before income taxes was $730  million, up 6%; and  pre-tax  profit margin  decreased to 60% in
2016 from 62% in 2015.

66

Market Making

The following table sets forth the results  of  our market making operations for the indicated  periods:

Revenues

Trading gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation and benefits . . . . . . . . . . . . . . . . . .
Occupancy, depreciation and amortization . . . . . . . . . . . . . .
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended
December 31,

2017

2016

2015

(in millions)

$ 40
89
16

145
59

86

32
25
3
7
46

$163
71
4

238
48

190

63
31
4
10
38

$269
62
10

341
43

298

72
38
4
10
44

Total non-interest expenses . . . . . . . . . . . . . . . . . . . . . . .

113

146

168

Income (loss) before income taxes . . . . . . . . . . . . . . . . . . . . .

$ (27) $ 44

$130

Year Ended December 31, 2017 (‘‘current year’’)  compared to the Year Ended  December 31, 2016

(‘‘prior year’’)

As previously described, in early 2017  we  started  the process  of winding down our options market
making operations and the market making  results described below  were mainly  impacted  by  such
pull-back.

Market making total net revenues, for the current year,  decreased  $104 million, or 55%, compared to
the prior year, to $86 million, primarily due to lower trading  gains.

Trading gains, for  the current year, decreased $123  million,  or  75% compared  to  the prior year, to
$40 million, unfavorably impacted by lower trading volumes,  as we began to wind  down our market
making activities in March 2017, and, to a lesser extent, by decreases  in volatility and in the
actual-to-implied volatility ratio, compared to the prior  year.  The VIX(cid:3), which measures perceived U.S.
equity market volatility, decreased 30%  to an average of 11.1  for the  current year, compared  to  an
average of 15.9 for the prior year. The ratio of actual to implied  volatility decreased  to  an average of
60% for the current year, compared  to  an average of 83% for the  prior year. Options and futures
contract and stock share volumes decreased  67%, 60%, and  45%, respectively, compared to the  prior
year.

Net interest income, for the current year,  increased  $7 million, or 30%, compared to the prior  year, to
$30 million. As described above, our  trading gains and our  net interest  income  are interchangeable and
depend  on the mix of market making  positions in our portfolio and on relative interest rates in  the
stock and options markets.

Other income, for the current year, increased $12  million,  compared to the prior  year,  to  $16 million
due to an $11 million one-time recovery of costs  related to the sale of  our U.S. options market  making
operations to Two Sigma Securities, LLC  and  $2 million in consulting fees related to the
reimbursement of costs incurred during  the transition of these operations to Two  Sigma
Securities, LLC.

67

Non-interest expenses, for the current  year, decreased $33 million, or  23%,  compared to the prior year,
to $113 million. Within non-interest expenses, execution  and  clearing fees decreased $31 million, or
49%, on lower trading volumes across product types. Employee compensation and benefits expenses
decreased $6 million, or 19%, driven by continued reductions in staff. General  and administrative
expenses increased $8 million, or 21%,  due to a $21  million  write-down  of  the value  of exchange
trading rights related to the wind-down of our U.S. options  market  making operations,  partially  offset
by lower consulting expenses, primarily  for internal software development. As  a percentage  of  total net
revenues, non-interest expenses were 131% for the current year  and 77% for  the prior year.

Income before income taxes, for the  current year, decreased $71 million, compared to the prior year, to
a loss of $27 million.

Year Ended December 31, 2016 compared  to the Year Ended December 31,  2015

Market making total net revenues, in 2016, decreased $108 million, or 36%,  compared to 2015, to
$190 million, primarily due to lower trading gains, partially offset by higher net  interest  income.

Trading gains, in 2016, decreased $106 million,  or 39%, compared to 2015, to $163 million, unfavorably
impacted by lower trading volumes, a  divergence  in price behavior  among a significant number  of
individual stocks during the first quarter of 2016 and decreases  in volatility and in the actual-to-implied
volatility ratio as compared to 2015. The  VIX(cid:3), which measures perceived U.S. equity market volatility,
decreased 5% to an average of 15.9 in  2016, compared to an  average of  16.7 in 2015.  The  ratio of
actual to implied volatility decreased  to  an average of  83% in  2016, compared to an  average of 88%  in
2015. Options and futures contract and  stock share volumes decreased 8%, 5%,  and 15%, respectively,
compared to 2015.

Net interest income, in 2016, increased $4  million, or 21%, compared  to 2015, to $23  million.  As
described above, our trading gains and  our net interest income are interchangeable and depend on  the
mix of market making positions in our  portfolio and on  relative  interest rates  in the stock and options
markets. In 2016, these factors produced  more net  interest income  than  in 2015.

Non-interest expenses, in 2016, decreased $22  million,  or 13%,  compared to 2015,  to  $146 million.
Within non-interest expenses, execution  and clearing fees decreased $9  million,  or 13%, on lower
trading volumes across product types.  Employee compensation  and benefits expenses decreased
$7 million, or 18%, driven by continued  reductions in  staff. General and administrative  expenses
decreased $6 million, or 14%, due to lower consulting expenses, primarily for internal  software
development. As a percentage of total net  revenues,  non-interest expenses  were 77%  in 2016 and 56%
in 2015.

Income before income taxes, in 2016, decreased $86 million, or 66%, compared to 2015, to $44 million.
As a percentage of total net revenues  for the market making segment, income before income taxes  was
23% in 2016 and 44% in 2015.

Liquidity and Capital Resources

We  maintain a highly liquid balance sheet. The majority of our assets  consist of investments  of
customer funds, collateralized receivables arising from customer-related and proprietary securities
transactions, and exchange-listed marketable securities, which are marked-to-market  daily.
Collateralized receivables consist primarily of customer  margin loans, securities  borrowed,  and, to a
lesser extent, receivables from clearing houses for  settlement  of securities transactions,  and securities
purchased under agreements to resell.  As  of December 31, 2017, total assets were  $61.2 billion  of
which  approximately $60.8 billion, or  99.3%, were considered liquid.

68

Daily monitoring of liquidity needs and  available collateral levels is  undertaken to help  ensure that an
appropriate liquidity cushion, in the form of unpledged collateral, is maintained  at all times. Our  ability
to quickly reduce funding needs by balance  sheet contraction without adversely  affecting our core
businesses and to pledge additional collateral  in support of secured borrowings is continuously
evaluated to ascertain the adequacy of our capital base.

We  actively manage our excess liquidity  and  we maintain significant borrowing facilities through the
securities lending markets and with banks. As a general practice,  we  maintain  sufficient levels  of cash
on hand  to provide us with a buffer should  we need immediately available funds  for any reason. Based
on our current level of operations, we believe our  cash  flows from operations, available  cash and
available borrowings will be adequate  to  meet our future liquidity needs for more than  the next twelve
months.

Liability balances, as of December 31,  2017, in connection with our  payables to customers and
securities loaned were higher than their  respective average monthly  balances  during the current  year
and short-term borrowings were lower  than the  average monthly  balance during the current year.

Cash and cash equivalents held by our non-U.S. operating companies as of December 31, 2017  were
$590 million ($448 million as of December 31,  2016).  These funds are primarily  intended to finance
each  individual operating company’s  local  operations, and  thus  would not be available to fund U.S.
domestic operations unless repatriated through  payment of dividends to IBG LLC. In June 2016,
December 2016, and September 2017  dividends of $40 million, $22 million,  and $32 million,
respectively, were paid to IBG LLC from two of our non-U.S. subsidiaries.  As of December 31,  2017,
we had no intention to repatriate further amounts  from non-U.S. operating companies.  With the
enactment of the Tax Act, we recognized a $62 million liability for the  one-time transition tax  on
deemed repatriation of earnings of some of our foreign  subsidiaries.  As a result, in the  event dividends
were to be paid to the Company in the  future by a non-U.S.  operating company, the Company  would
not be required to accrue and pay income  taxes on such dividends,  except for foreign taxes in the form
of dividend withholding tax, if any, imposed on  the recipient of the  distribution or dividend distribution
tax imposed on the payor of the distribution.

Historically, our consolidated equity has  consisted primarily of accumulated retained earnings, which to
date  have been sufficient to fund our operations  and growth. Our  consolidated  equity increased 10% to
$6.4 billion as of December 31, 2017 from $5.8 billion as of  December 31,  2016. This  increase is
attributable to total comprehensive income, partially offset by distributions and  dividends  paid during
2017.

Cash Flows

The following table sets forth our cash flows from  operating activities, investing  activities and financing
activities for the periods indicated:

Net cash provided by operating activities . . . . . . . . . . . . . . .
Net cash used in investing activities . . . . . . . . . . . . . . . . . . .
Net  cash used in financing activities . . . . . . . . . . . . . . . . . .
Effect of exchange rate changes on cash and cash

Year-Ended December 31,

2017

2016

2015

(in millions)
$ 544
(6)
(189)

$ 142
(26)
(374)

$ 725
(35)
(295)

equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

65

(25)

(63)

(Decrease) increase in cash and cash equivalents . . . . . . . . .

$(193) $ 324

$ 332

69

Our cash  flows from operating activities  are largely  a reflection  of the changes in  customer credit and
margin loan balances in our electronic brokerage business, and of the size  and composition of  trading
positions held by our market making subsidiaries. Our  cash  flows from investing  activities are  primarily
related to other investments, capitalized  internal  software development, purchases and sales of
memberships at exchanges where we trade,  and  strategic investments where such investments may
enable us to offer better execution alternatives to our current and prospective customers, or where we
can influence exchanges to provide competing products at better prices  using sophisticated technology.
Our cash  flows from financing activities  are  comprised of  short-term borrowings and capital
transactions. Short-term borrowings from banks are part of our daily cash management  in support of
operating activities. Capital transactions  consist primarily of quarterly  dividends  paid to common
stockholders and related distributions paid to Holdings.

Year Ended December 31, 2017: Our cash and cash equivalents decreased by $193  million to
$1.7 billion for the year ended December 31, 2017. We  raised $142  million  in net cash from operating
activities. We used net cash of $400 million in  our investing  and  financing  activities, primarily for
distributions to noncontrolling interests,  dividends paid  to our common  stockholders  and payments
made under the Tax Receivable Agreement. Investing activities  mainly consisted  of distributions
received from investments and purchases  of property, equipment  and  intangible  assets.

Year Ended December 31, 2016: Our cash and cash equivalents increased by  $324 million to
$1.9 billion for the year ended December 31, 2016. We  raised $544  million  in net cash from operating
activities. We used net cash of $195 million in  our investing  and  financing  activities, primarily for
distributions to noncontrolling interests,  dividends paid  to our common  stockholders  and payments
made under the Tax Receivable Agreement. Under investing  activities, purchases and sales of other
investments mainly consisted of transactions in marketable securities held for investment purposes  and
distributions received from investments.

Year Ended December 31, 2015: Our cash and cash equivalents increased by  $332 million to
$1,601 million for the year ended December 31, 2015.  We raised $725 million  in net cash from
operating activities. We used net cash  of  $330 million in our investing  and  financing  activities, primarily
for distributions to noncontrolling interests,  dividends paid to our common  stockholders,  and payments
made to Holdings under the Tax Receivable  Agreement. Under investing activities, purchases  and sales
of other investments mainly consisted of transactions  in marketable securities held for investment
purposes.

Regulatory Capital Requirements

Our principal operating companies are  subject to separate regulation and  capital requirements  in the
U.S. and other jurisdictions. IB LLC  and TH LLC  are registered U.S.  broker-dealers and  their primary
regulators include the SEC, the Chicago Board Options Exchange, and  FINRA. Additionally, IB LLC
is regulated by the CFTC and the Chicago  Mercantile Exchange. IB  LLC is also a  registered U.S.
futures commission merchant, as such it  is regulated by the NFA. THE is registered to do business in
Switzerland as a securities dealer and is regulated  by the Swiss  Financial  Market  Supervisory Authority.
Our various other  operating companies  are  similarly regulated.  See  the  notes to the  audited
consolidated financial statements in Part II, Item  8 of this Annual  Report  on Form 10-K for further
information regarding our regulated operating companies.

70

As of December 31, 2017, aggregate  excess regulatory capital for all of the  operating companies  was
$4.5 billion, and all of the operating  companies  were in compliance  with their respective  regulatory
capital requirements.

IB LLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TH  LLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other regulated operating companies . . . . . . . . .

Net Capital/
Eligible Equity

Requirement

Excess

$3,548
279
614
773

$5,214

(in millions)
$495
1
92
121

$709

$3,053
278
522
652

$4,505

Capital Expenditures

Our capital expenditures are comprised  of compensation costs of our software engineering staff  for
development of software for internal use and expenditures for computer, networking  and
communications hardware. These expenditure items  are reported as property, equipment, and
intangible assets. Capital expenditures  for  property, equipment, and intangible  assets were
approximately $28 million, $27 million, and $30 million for  the three  years ended December  31, 2017,
2016, and 2015, respectively. In the future,  we plan to meet capital  expenditure needs as  we continue
our  focus on technology infrastructure initiatives to further enhance our competitive position. We
anticipate that we will fund capital expenditures  with cash from operations and cash  on hand. In
response to changing economic conditions, we believe we have the  flexibility to modify  our  capital
expenditures by adjusting them (either upward or  downward) to match  our actual performance. If we
pursue any strategic acquisitions, we may incur  additional capital expenditures.

Contractual Obligations Summary

Our contractual obligations principally include obligations associated with  our outstanding indebtedness
and interest payments as of December 31,  2017.

Payable to Holdings under Tax Receivable Agreement(1) . . . .
Operating leases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transition Tax liability(2) . . . . . . . . . . . . . . . . . . . . . . . . . . .

$187
154
62

Total contractual cash obligations . . . . . . . . . . . . . . . . . . . . .

$403

(in millions)
$34
20
10

$64

$49
25
10

$84

$104
109
42

$255

Payments Due by Year

Total

2018 - 2019

2020 - 2021

Thereafter

(1) As of December 31, 2017, contractual amounts  owed under the Tax Receivable Agreement of

$187 million have been recorded in payable to affiliate in  the consolidated  financial  statements
representing management’s best estimate of the amounts currently expected  to  be  owed under  the
Tax  Receivable Agreement. Through December 31,  2017, approximately $131 million of cumulative
cash payments have been made.

(2) The Tax Act implemented a modified territorial tax system that includes  a one-time transition tax

on deemed repatriated earnings of foreign subsidiaries to be paid over  an  eight-year period. We
believe this tax will not have a material impact on our liquidity.

71

Seasonality

Our businesses are subject to seasonal  fluctuations, reflecting  varying  numbers of  market participants at
times during the year, varying numbers of trading  days from quarter-to-quarter, and declines in trading
activity due to holidays. Typical seasonal trends may be superseded  by market  or world events,  which
can have a significant impact on prices and trading volume.

Inflation

Although we cannot accurately anticipate  the effects of inflation on our operations,  we believe  that,  for
the three most recent years, inflation  has  not  had a  material  impact on our results of operations and
will not likely have a material impact in the  foreseeable future.

Investments in U.S. Government Securities

We  invest in U.S. government securities for the  purpose of satisfying U.S.  regulatory requirements. As
a broker-dealer, unlike banks, we are required to mark these  investments to market even though  we
intend to hold them to maturity. Sudden increases in interest rates will cause mark-to-market losses on
these securities, which are recovered if we  hold  them to maturity, as  currently intended.  The  impact  of
changes in interest rates is further described in ITEM  7A of  this Annual Report on Form 10-K  entitled
‘‘Quantitative and Qualitative Disclosures  about Market  Risk.’’

Strategic Investments and Acquisitions

We  regularly evaluate potential strategic  investments  and acquisitions. We hold strategic  investments in
electronic trading exchanges including: BOX Options  Exchange, LLC  and  OneChicago LLC. In
addition, on September 20, 2017, we  announced  our agreement to make a strategic  investment in Tiger
Brokers, an online stock brokerage established for global  Chinese retail and institutional clients.

We  intend to continue making acquisitions on  an opportunistic  basis, generally only when  the
acquisition candidate will, in our opinion,  enable us to acquire either technology  or customers  faster
than we could develop them on our own.

As of December 31, 2017, there were  no other definitive agreements with respect  to  any material
acquisition.

Certain Information Concerning Off-Balance-Sheet Arrangements

We  may be exposed to a risk of loss  not  reflected in  our consolidated  financial  statements  for futures
products, which represent our obligations  to settle at contracted prices, and which  may require us to
repurchase or sell in the market at prevailing  prices. Accordingly, these transactions result in
off-balance sheet risk, as our cost to liquidate  such futures contracts may exceed  the amounts reported
in our consolidated statements of financial condition.

Critical Accounting Policies

Principles of Consolidation, including Noncontrolling Interests

The consolidated financial statements include the accounts  of IBG,  Inc. and its majority and wholly
owned subsidiaries. As sole managing  member of  IBG LLC, we exert control over  the Group’s
operations. In accordance with Financial Accounting Standards Board  (‘‘FASB’’) Accounting Standards
Codification (‘‘ASC’’) ASC Topic 810, ‘‘Consolidation,’’ we consolidate the Group’s consolidated
financial statements and record as noncontrolling  interest  the interests in the Group that we do  not
own.

72

We  are the sole managing member of IBG  LLC and, as such, operate and control all of the business
and affairs of IBG LLC and its subsidiaries  and  as such, consolidate IBG  LLC’s  financial  results into
our  financial statements. We hold approximately 17.4%  ownership interest  in IBG  LLC. Holdings  is
owned by the original members of IBG  LLC and holds approximately 82.6% ownership interest in
IBG LLC. Our current share of IBG  LLC’s net income is approximately  17.4%.

Our policy is to consolidate all other entities in which  we own more than 50% unless we do  not  have
control. All inter-company balances and  transactions have been eliminated.

Use of Estimates

The preparation of financial statements  in conformity with  U.S. GAAP  requires management  to  make
estimates and assumptions that affect  the reported amounts and  disclosures in  the consolidated
financial statements and accompanying  notes.  These  estimates and  assumptions  are based  on judgment
and the best available information at  the time. Therefore, actual results could differ materially from
those estimates. Such estimates include  the allowance for doubtful accounts,  valuation of certain
investments, compensation accruals, current and  deferred income  taxes, costs associated with exit  or
disposal activities, and contingency reserves.

Valuation of Financial Instruments

Due to the nature of our operations, substantially  all of our financial  instrument assets, comprised  of
financial instruments owned, securities  purchased  under agreements  to  resell, securities borrowed,
receivable from customers, and receivables from brokers, dealers  and clearing organizations are  carried
at fair value based on published market prices  and are marked to market daily, or are  assets which  are
short-term in nature and are reported  at  amounts that approximate  fair value. Similarly, all of our
financial instrument liabilities that arise from financial instruments sold but not yet purchased,
securities sold under agreements to repurchase,  securities loaned, payables to customers, and payables
to brokers, dealers and clearing organizations are carried at  fair value based  on published market  prices
and are marked to market daily, or are liabilities which  are short-term in nature and are  reported at
amounts that approximate fair value.  Our long and  short  positions  are  mainly valued at the last
consolidated trade price at the close of regular  trading hours, in  their respective markets. Given that
we manage a globally integrated market  making portfolio, we may have offsetting positions in securities
and commodities that trade on different  exchanges that close  at  different times of the  trading day.  As a
result, there may be large and anomalous swings in the  value  of our  positions  daily  and, accordingly, in
our  earnings in any period. This is especially  true on the last business  day of each calendar quarter or
year, although such swings tend to come back into equilibrium  on the first business day  of the
succeeding calendar quarter or year.

Earnings per Share

Earnings per share (‘‘EPS’’) are computed in accordance with FASB ASC  Topic 260,  ‘‘Earnings  per
Share.’’ Basic EPS is computed by dividing the net income  available for  common  stockholders  by  the
weighted average number of shares outstanding for that period. Diluted EPS is calculated by dividing
the net income available for common stockholders by the diluted weighted average shares outstanding
for that period. Diluted EPS includes the determinants  of the basic EPS  and, in addition,  reflects the
dilutive effect of shares of common stock  estimated to be distributed in the  future under our stock-
based compensation plans, with no adjustments to net  income available for common  stockholders  for
dilutive potential common shares.

73

Stock-Based Compensation

We  follow FASB ASC Topic 718, ‘‘Compensation—Stock  Compensation’’ (‘‘ASC Topic 718’’), to account
for our  stock-based compensation plans.  ASC  Topic 718  requires all share-based payments to employees
to be recognized in the consolidated financial statements using a fair value-based method. Grants,
which  are denominated in U.S. dollars, are communicated to employees  in the year of grant,  thereby
establishing the fair value of each grant. The  fair value of awards granted to employees are generally
expensed as follows: 50% in the year  of  grant in recognition of the plans’  post-employment provisions
(as described below) and the remaining 50% over  the related vesting period utilizing the ‘‘graded
vesting’’ method permitted under ASC  Topic  718. In the case of ‘‘retirement eligible’’ employees (those
employees older than 59), 100% of awards  are expensed when granted.

Awards granted under the stock-based compensation plans are subject to the plans’ post-employment
provisions in the event an employee  ceases employment  with us.  The  plans provide  that  employees who
discontinue employment with us without cause and continue to meet  the  terms of the  plans’
post-employment provisions will be eligible to earn  50% of previously granted, but not yet  earned
awards, unless the employee is over the  age of 59,  in which  case the employee would be eligible to
receive 100% of previously granted, but  not yet earned  awards.

Contingencies

Our policy is to estimate and accrue for  potential losses that may arise  out of  litigation  and regulatory
proceedings, to the extent that such losses  are probable  and can be estimated, in accordance with FASB
ASC Topic 450, ‘‘Contingencies.’’ Significant  judgment is  required in making these estimates and  our
final liabilities may ultimately be materially different. Our  total  liability  accrued with  respect to
litigation and regulatory proceedings  is determined  on a  case-by-case basis  and represents  an estimate
of probable losses based on, among other  factors, the  progress of each case, our experience with and
industry experience with similar cases  and the opinions and  views  of  internal  and external  legal counsel.
Given the inherent difficulty of predicting the outcome of  our litigation  and regulatory matters,
particularly in cases or proceedings in which substantial  or indeterminate damages or fines are sought,
or where cases or proceedings are in  the early stages, we cannot estimate losses or  ranges of losses  for
cases or proceedings where there is only a reasonable  possibility that a loss  may be incurred.

We  have been from time to time subject to certain pending and legal  actions which  arise out of the
normal course of business. Litigation  is inherently  unpredictable, particularly  in proceedings where
claimants seek substantial or indeterminate damages, or which are in their  early stages. We cannot
predict with certainty the actual loss or  range  of loss  related to such  legal proceedings, the manner in
which  they will be resolved, the timing  of final resolution  or the ultimate settlement. Consequently, we
cannot estimate losses or ranges of losses  related to such legal  matters, even  in instances  where it is
reasonably possible that a future loss  will  be incurred. As of December 31, 2017, we, along with  certain
of our subsidiaries, have been named  parties to legal actions, which we  and/or such subsidiaries intend
to defend vigorously. Although the results of legal actions cannot  be  predicted with certainty, it is  the
opinion of management that the resolution of these actions is not expected  to  have a material adverse
effect, if any, on our business or financial condition, but may have a material impact on the results  of
operations for a given period. As of  December  31, 2017 and December 31, 2016,  reserves  provided for
potential losses related to litigation matters  were  not  material.

Income Taxes

We  account for income taxes in accordance with FASB ASC Topic 740, ‘‘Income Taxes’’  (‘‘ASC
Topic 740’’). Our income tax expense, deferred  tax assets  and liabilities, and reserves for unrecognized
tax benefits are based on enacted tax laws  and reflect management’s best assessment  of  estimated
future taxes to be paid. We are subject to income taxes in  both the U.S. and  numerous foreign
jurisdictions. Determining income tax  expense  requires significant  judgments and estimates.

74

Deferred income tax assets and liabilities  arise  from temporary differences between the tax and
financial statement recognition of the  underlying assets and liabilities.  In evaluating our ability to
recover our deferred tax assets within the  jurisdictions from  which they arise,  we consider all available
positive and negative evidence, including scheduled  reversals of deferred  tax liabilities,  projected future
taxable income, tax-planning strategies, and results of recent operations. In  projecting  future taxable
income, historical results are adjusted for  changes  in accounting policies and incorporate  assumptions
including the amount of future state, federal and foreign pre-tax operating income, the reversal of
temporary differences, and the implementation of feasible and  prudent tax-planning strategies. These
assumptions require significant judgment  about the forecasts  of  future taxable  income  and are
consistent with the plans and estimates we are using to manage the underlying businesses.  In evaluating
the objective evidence that historical  results  provide, three years of  cumulative operating  income  (loss)
are considered. Deferred income taxes have not been  provided for U.S. tax  liabilities  or for  additional
foreign taxes on the unremitted earnings of  foreign subsidiaries that  have been indefinitely reinvested.

The calculation of our tax liabilities involves dealing with uncertainties in the application of complex
tax laws and regulations in a multitude  of jurisdictions across  our global operations.  Changes in tax
laws and rates could also affect recorded deferred tax assets and liabilities in the future.  The enactment
of the Tax Act on  December 22, 2017  significantly revised the  U.S corporate income tax law  by,  among
other things, reducing the corporate income tax  rate  from 35% to 21% and implementing a  modified
territorial tax system that includes a one-time transition  tax  on deemed repatriated earnings of foreign
subsidiaries. See Note 10 to the audited consolidated financial statements  in Part  II, Item 8  of this
Annual Report on Form 10-K. We record tax liabilities in accordance with  ASC Topic 740 and adjust
these liabilities when management’s judgment  changes as a  result of  the  evaluation of new  information
not previously available. Because of the  complexity of  some of  these uncertainties, the ultimate
resolution may result in payments that  are different from the  current estimates of these tax liabilities.
These differences will be reflected as increases or decreases  to  income tax expense in the  period in
which  new information becomes available.

We  recognize that a tax benefit from an  uncertain  tax position may  be  recognized only when it  is more
likely than not that the position will  be  sustained upon examination, including resolutions of any related
appeals or litigation processes, on the  basis of the technical  merits. A tax  position  that  meets this
standard is measured at the largest amount  of benefit that will more  likely than not be realized on
settlement.

We  recognize interest related to income tax  matters  as interest income or interest expense  and
penalties related to income tax matters as income tax expense.

75

Recently Issued Accounting Pronouncements

Following is a summary of recently issued  FASB Accounting Standards Updates (‘‘ASUs’’)  that  have
affected or may affect our consolidated financial  statements:

Affects

Status

ASU 2016-01 Financial Instruments—Overall

(Subtopic 825-10): Recognition and
Measurement of Financial Assets and
Financial Liabilities.

ASU 2016-02 Leases  (Topic 842): Requires the

recognition of a right-of-use asset and  a
lease liability for leases previousely
classified as operating leases in the
statements of financial condition.

ASU 2016-08 Revenue from Contracts with Customers

(Topic  606): Principal versus Agent
Considerations (Reporting Revenue Gross
versus Net).

ASU 2016-10 Revenue from Contracts with Customers

(Topic  606): Identifying Performance
Obligations and Licensing.

ASU 2016-13 Financial Instruments—Credit Losses
(Topic  326): Measurement of Credit
Losses on Financial Instruments.

ASU 2016-15

Statement of Cash Flows (Topic 230):
Classification of Certain Cash Receipts
and Cash Payments.

Effective for fiscal years beginning after
December 15, 2017.

Effective for fiscal years beginning after
December 15,  2018.

Effective for annual reporting periods
beginning  after December 15, 2017.

Effective for annual reporting periods
beginning after December 15, 2017.

Effective for fiscal years beginning after
December 15, 2019.

Effective for fiscal years beginning after
December  15, 2017.

ASU 2016-16

Income Taxes (Topic 740): Intra-Entity
Transfers of Assets Other Than Inventory.

Effective for annual  reporting periods
beginning after December 15, 2017.

ASU 2017-01 Business Combinations (Topic 805):

Clarifying the Definition of a Business.

Effective for annual periods beginning
after December 15, 2017.

ASU 2017-04

Intangibles—Goodwill and Other
(Topic  350): Simplifying the Test for
Goodwill Impairment.

ASU 2017-05 Other Income—Gains and Losses from the

Derecognition of Nonfinancial Assets
(Subtopic 610-20): Clarifying the Scope of
Asset Derecognition Guidance and
Accounting for Partial Sales of
Nonfinancial Assets.

Effective for fiscal years beginning after
December 15,  2019.

Effective for annual reporting periods
beginning after December 15, 2017.

ASU 2017-08 Receivables—Nonrefundable Fees and Other Effective for fiscal years, and interim

Costs (Subtopic 310-20): Amending the
amortization period for certain purchased
callable debt securities held at a premium.

periods within those fiscal years, beginning
after December 15, 2018.

76

Affects

Status

ASU 2017-09 Compensation—Stock Compensation

(Topic  718): Providing clarity and reduce
both diversity in practice and cost and
complexity when applying the guidance in
Topic 718, Compensation—Stock
Compensation, to a change to the terms
or conditions of a share-based payment
award.

ASU 2017-11 Earnings Per Share (Topic 260)

Distinguishing Liabilities from Equity
(Topic  480) Derivatives and Hedging
(Topic  815): Changing the classification
analysis of certain equity-linked financial
instruments (or embedded features)  with
down round features.

ASU 2017-12 Derivatives and Hedging (Topic 815):

ASU 2018-02

Targeted Improvements to Accounting for
Hedging Activities.

Income Statement—Reporting
Comprehensive Income (Topic 220):
Reclassification of Certain Tax Effects
from Accumulated Other Comprehensive
Income.

Effective for annual periods, and interim
periods within  those annual  periods,
beginning after December 15, 2017.

Effective for fiscal years, and interim
periods within those fiscal years, beginning
after December 15, 2018.

Effective for fiscal years, and interim
periods within those fiscal years, beginning
after December  15, 2018.

Effective for fiscal years, and interim
periods within those fiscal years, beginning
after December 15, 2018.

Adoption of those ASUs that became effective during 2017  and 2018  prior to the  issuance  of  our
consolidated financial statements, did not have a material  effect on  these financial statements.

We  have reviewed the impact of FASB  ASU  Topic 606,  ‘‘Revenue  from Contracts with Customers’’
(‘‘ASC  Topic 606’’), and identified similar performance  obligations under  ASC Topic 606  as compared
with deliverables and separate units of  account previously identified, as a result we expect  the timing of
our  revenue to remain the same as compared to FASB ASC Topic 605, ‘‘Revenue Recognition.’’ We
expect to adopt ASC Topic 606 using the  modified  retrospective  method, effective January 1,  2018.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES  ABOUT MARKET  RISK

We  are exposed to various market risks. Our exposures to market risks  arise from  assumptions  built
into our pricing models, equity price  risk,  foreign currency exchange rate fluctuations  related to our
international operations, changes in interest  rates  which impact our variable-rate debt obligations, if
any, and risks relating to the extension of margin credit to our customers.

Market risk refers to the risk that a change in  the level  of  one or more  market prices,  rates,  indices,
implied volatilities (the price volatility  of the  underlying  instrument imputed from  option prices),
correlations or other market factors, such  as market liquidity, will result  in losses for a position or
portfolio. Generally, we incur trading-related  market  risk as  a result of  activities in  the market making
segment, where the substantial majority  of our Value-at-Risk (‘‘VaR’’) for market risk exposures  is
generated. In addition, we incur non-trading-related  market risk primarily from investment  activities
and from foreign currency exposure held  in the  equity of our foreign affiliates,  i.e., our non-U.S.
brokerage affiliates and information technology affiliates, and held  to  meet target balances in  our
currency diversification strategy.

77

We  use various risk management tools  in  managing our  market risk,  which are  embedded  in our
real-time market making systems. We  employ certain hedging  and risk management techniques  to
protect us from a severe market dislocation. Our  risk  management policies are developed and
implemented by our Chairman and our  steering  committee, which is comprised of senior executives of
our  various companies. Our strategy  is to calculate  quotes a few  seconds ahead  of  the market and
execute small trades at a tiny but favorable differential as a result. This is  made possible by our
proprietary pricing model, which evaluates and monitors the risks inherent in our  portfolio,  assimilates
external  market data and reevaluates  the outstanding quotes in our portfolio many times per second.
Our model automatically rebalances  our positions throughout  each trading day to manage risk
exposures on our options and futures positions and the underlying securities, and  will price the
increased risk that a position would add to the overall  portfolio  into  the bid and  offer prices we post.
Under risk management policies implemented  and  monitored primarily  through our computer systems,
reports to management, including risk profiles, profit  and loss analysis  and  trading performance, are
prepared on a real-time basis as well  as daily  and  periodical  bases. Although our market making is
completely automated, the trading process and our risk are monitored by a  team of individuals who, in
real time, observe various risk parameters of our consolidated positions. Our assets and  liabilities are
marked-to-market daily for financial reporting  purposes and  re-valued continuously  throughout the
trading day for risk management and asset/liability management purposes.

We  use a covariant VaR methodology to measure,  monitor and  review the  market risk of our market
making portfolios, with the exception of fixed income products,  and our  currency  exposures. The risk of
fixed income products, which comprise primarily U.S.  government securities, is  measured using a  stress
test.

Pricing Model Exposure

As described above, our proprietary pricing model, which  continuously evaluates and monitors  the risks
inherent in our portfolio, assimilates external  market  data and reevaluates  the outstanding quotes  in
our  entire portfolio many times per second. Certain  aspects of the model rely on  historical  prices of
securities. If the behavior of price movements  of  individual securities diverges  substantially  from what
their historical behavior would predict, we might incur trading losses.  We attempt to limit such  risks  by
diversifying our portfolio across many different options, futures and  underlying securities and avoiding
concentrations of positions based on the same underlying security. Historically, our losses  from these
events have been immaterial in comparison to our  annual trading profits.

Foreign Currency Exposure

As a result of our international market making activities and accumulated earnings  in our foreign
subsidiaries, our income and net worth  is  exposed to fluctuations in foreign exchange rates. For
example, our European operations and  some of our Asian  operations are conducted by our  Swiss
subsidiary, THE. THE is regulated by  the Swiss Financial  Market  Supervisory Authority as a  securities
dealer and its financial statements are  presented in Swiss francs. Accordingly, THE is exposed to
certain foreign exchange risks as described below:

(cid:127) THE  buys and sells futures contracts and securities denominated in  various currencies and

carries bank balances and borrows and lends such currencies in  its  regular course of business. At
the end of each accounting period, THE’s assets and liabilities are revalued into Swiss francs for
presentation in its financial statements. The resulting foreign  currency gains or losses are
reported in THE’s income statement and, as  translated into U.S.  dollars  for U.S. GAAP
purposes, in our consolidated statement of  comprehensive income, as a component of other
income.

78

(cid:127) THE’s financial statements are presented in  Swiss francs  (i.e., its functional currency)  as noted

above. At the end of each accounting period,  THE’s net worth  is translated  at the  then
prevailing exchange rate into U.S. dollars and the resulting translation gain  or loss  is reported as
OCI in our consolidated statement of  financial condition and consolidated  statement  of
comprehensive income. OCI is also produced by our other non-U.S.  subsidiaries.

Historically, we have taken the approach of not hedging the  above exposures, based  on the notion  that
the cost of constantly hedging over the years would amount to more than the random  impact  of  rate
changes on our non-U.S. dollar balances.  For instance, an increase in the value of the  Swiss franc
would be unfavorable to the earnings  of THE but would be counterbalanced to some  extent by the fact
that the translation gain or loss into U.S.  dollars  is likely  to  move in the opposite direction.

Our market making systems incorporate  cash forex to hedge our currency exposure at  little or no cost
throughout each day on a continuous  basis. The majority of currency spot  positions  held as part of our
currency diversification strategy are regularly transferred from the market making segment to the
parent holding company, IBG LLC, where they are held and  reported in  the corporate  segment. In
connection with the development of our currency  diversification strategy,  we determined  to  base  our
net worth in GLOBALs, a basket of currencies.

Because we conduct business in many countries and many currencies and because we consider ourselves
a global enterprise based in a diversified  basket of currencies rather  than  a U.S.  dollar based  company,
we actively manage our global currency  exposure by  maintaining our  equity in  GLOBALs. The
U.S. dollar value of the GLOBAL increased from  $0.949 to  $0.978, or  3.06%, as of December 31,  2017
compared to December 31, 2016. As of December 31,  2017,  approximately  30% of our equity was
denominated in currencies other than the U.S. dollar.

The table below shows a comparison  of the U.S. dollar equivalent of the  GLOBAL  as of December 31,
2017 and 2016.

As of 12/31/2016

As of  12/31/2017

GLOBAL in % of
Currency Composition FX Rate USD Equiv. Comp.

Net  Equity

GLOBAL in %  of
(in USD  millions) Composition FX  Rate USD  Equiv. Comp.

New

Net  Equity

CHANGE  in
(in USD millions) % of Comp.

USD .
EUR .
JPY .
.
GBP .
HKD .
INR .
.
CHF .
CAD .
CNH .
AUD .
MXN .
SEK .
.
SGD .
NOK .
DKK .

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

0.45
0.17
8.00
0.03
0.26
2.00
0.03
0.04
0.19
0.03
0.30
0.09
0.01
0.06
0.04

1.0000
1.0519
0.0086
1.2341
0.1290
0.0147
0.9819
0.7445
0.1434
0.7216
0.0482
0.1098
0.6905
0.1158
0.1416

0.450
0.179
0.068
0.037
0.034
0.029
0.029
0.030
0.027
0.022
0.014
0.010
0.007
0.007
0.006

0.949

47.4%
18.8%
7.2%
3.9%
3.5%
3.1%
3.1%
3.1%
2.9%
2.3%
1.5%
1.0%
0.7%
0.7%
0.6%

100.0%

$2,759
1,096
420
227
206
180
181
183
167
133
89
61
42
43
35

$5,820

Changes in the Composition of the ‘‘GLOBAL’’

0.68
0.09
4.41
0.02
0.14
1.10
0.02
0.02
0.10
0.02
0.17
0.05
0.00
0.03
0.02

1.0000
1.1998
0.0089
1.3514
0.1280
0.0157
1.0263
0.7950
0.1535
0.7802
0.0509
0.1219

0.1218
0.1612

0.680
0.108
0.039
0.027
0.018
0.017
0.021
0.016
0.015
0.016
0.009
0.006

0.004
0.003

0.978

69.5%
11.0%
4.0%
2.8%
1.8%
1.8%
2.1%
1.6%
1.6%
1.6%
0.9%
0.6%

0.4%
0.3%

$4,471
710
257
178
118
113
135
105
101
103
57
40

24
21

100.0%

$6,433

22.1%
(cid:5)7.8%
(cid:5)3.2%
(cid:5)1.1%
(cid:5)1.7%
(cid:5)1.3%
(cid:5)1.0%
(cid:5)1.5%
(cid:5)1.3%
(cid:5)0.7%
(cid:5)0.6%
(cid:5)0.4%
(cid:5)0.7%
(cid:5)0.4%
(cid:5)0.3%

0.0%

In light of our decision to discontinue our  options market  making activities globally, we removed  the
Singapore dollar (SGD) and realigned  the relative weights of the  U.S.  dollar  (USD) versus the other
currency components to better reflect  our businesses going forward. The new  composition  contains 14
currencies, one fewer than the prior composition.  The new composition was effective  as of the close of
business on March 31, 2017.

79

The effects of our currency diversification  strategy appear in two  places in the consolidated financial
statements: (1) as a component of other income in  the consolidated  statement  of comprehensive
income and (2) as OCI in the consolidated statement  of  financial  condition and the consolidated
statement of comprehensive income. The full effect of  the GLOBAL is captured in the consolidated
statement of comprehensive income.

Reported results on a comprehensive basis reflect the U.S. GAAP convention that requires  the
reporting of currency translation results  contained in OCI as part of reportable earnings.

Interest Rate Risk

We  had no variable-rate debt outstanding as of December 31,  2017.

We  pay our electronic brokerage customers interest based on benchmark overnight  interest  rates in
various currencies, on balances above $10  thousand, or  equivalent, and on accounts holding more than
$100 thousand (or equivalent) net asset  value. In a normal rate environment, we typically invest a
portion of these funds in U.S. government securities  with maturities  of  up to two years. If interest rates
were to increase rapidly and substantially, our net interest income would  not increase  proportionally
with the interest rates for the portion  of  the funds  invested  in the U.S. government securities with  fixed
yields. In addition, the mark-to-market  changes  in the value of these fixed rate securities  will be
reflected in other income, instead of net  interest  income.  Based  on customer balances and investments
outstanding as of December 31, 2017,  and assuming  reinvestment of maturing  instruments in
instruments of short-term duration, an  increase  of  0.25% over  current U.S. dollar interest rate levels
would increase our net interest income  by  approximately $11  million  over the first year and $15 million
on an annualized basis, assuming the full effect of reinvestment  at higher rates.  Our interest rate
sensitivity estimate has been updated to separate assumptions for U.S. dollar  rates from  other
currencies’ rates and to isolate the effects  of  a rate increase  on reinvestments.  We do not approximate
mark-to-market impact from interest rate  changes; if U.S. government  securities whose prices were  to
fall under these scenarios were held to  maturity, as  intended, then  the reduction in other income would
be temporary, as the securities would mature at par value.

We  also face the potential for reduced net  interest  income from customer deposits due to interest rate
spread compression in a low rate environment. Based  on customer  balances and investments
outstanding as of December 31, 2017,  and assuming  reinvestment of maturing  instruments in
instruments of short-term duration, a  decrease in U.S.  dollar interest rates of 0.25% would  decrease
our  net interest income by approximately $7 million over the first year and $16  million  on an
annualized basis, assuming the full effect of reinvestment  at lower rates.

We  also face substantial interest rate  risk  due to positions carried in  our market  making business to the
extent that long or short stock positions  may have been established for future  or forward dates on
options or futures contracts and the value of  such positions  are  impacted by interest rates. The amount
of such risk cannot be quantified, however, the reduction of market making  positions  has substantially
reduced this exposure.

Dividend Risk

We  face dividend risk in our market  making business as we derive significant revenues  and incur
significant expenses in the form of dividend income and expense,  respectively, from our inventory of
equity securities, and must make significant payments  in lieu of dividends on short  positions  in equity
securities within our portfolio. Projected future dividends are an important  component of pricing equity
options and other derivatives, and incorrect projections may lead  to  trading losses. The amount of such
risk cannot be quantified.

80

Margin Loans

We  extend margin loans to our customers, which  are subject  to  various regulatory  requirements. Margin
loans are collateralized by cash and securities in  the customers’  accounts. The risks associated with
margin credit increase during periods  of fast  market  movements or  in cases where collateral is
concentrated and market movements  occur. During such times, customers who utilize  margin loans  and
who have collateralized their obligations with  securities may find  that the securities have a rapidly
depreciating value and may not be sufficient  to  cover their obligations in the event of  a liquidation.  We
are also exposed to credit risk when our customers execute transactions, such  as short sales  of options
and equities that can expose them to  risk  beyond their invested capital.

We  expect this kind of exposure to increase  with the growth of our overall business. Because we
indemnify and hold harmless our clearing firms from certain  liabilities or  claims, the use of margin
loans and short sales may expose us to  significant off-balance-sheet risk in  the event that collateral
requirements are not sufficient to fully  cover losses that customers may incur and those  customers fail
to satisfy their obligations. As of December 31, 2017, we had  $29.8 billion  in margin loans extended to
our  customers. The amount of risk to  which we are  exposed from the margin loans  we extend  to  our
customers and from short sale transactions  by our customers is  unlimited and not quantifiable as the
risk is dependent upon analysis of a potential  significant and undeterminable  rise or  fall in stock  prices.
Our account level margin requirements meet or exceed  those  required by Regulation T of the Board of
Governors of the Federal Reserve and SEC portfolio margin  rules,  as applicable. As  a matter of
practice, we enforce real-time margin compliance monitoring  and  liquidate customers’ positions if their
equity falls below required margin requirements.

We  have a comprehensive policy implemented in  accordance with  regulatory standards  to  assess and
monitor the suitability of investors to engage in  various trading activities. To mitigate our risk, we  also
continuously monitor customer accounts to detect  excessive concentration, large orders or  positions,
patterns of day trading and other activities that indicate increased risk to us.

Our credit exposure is to a great extent  mitigated by our policy of automatically  evaluating  each
account throughout the trading day and closing  out positions automatically for  accounts that are found
to be under-margined. While this methodology is  effective in most  situations, it  may not be effective in
situations where no liquid market exists  for the relevant securities or commodities  or where,  for any
reason, automatic liquidation for certain  accounts has been  disabled.

Value-at-Risk

We  estimate VaR using an historical approach, which uses  the historical  daily price returns  of
underlying assets as well as estimates of  the end of day implied volatility  for options.  Our one-day VaR
is defined as the unrealized loss in portfolio value that, based  on historically  observed market risk
factors, would have been exceeded with  a  frequency of one percent,  based on  a calculation with a
confidence interval of 99%.

Our VaR model generally takes into  account exposures  to  equity and commodity price  risk and foreign
exchange rates.

We  use VaR as one of a range of risk  management tools. Among their  benefits, VaR  models  permit
estimation of a portfolio’s aggregate  market risk  exposure, incorporating  a range of varied market  risks
and portfolio assets. One key element  of  the VaR model is that  it reflects risk  reduction due to
portfolio diversification or hedging activities. However, VaR  has various strengths and limitations, which
include, but are not limited to: use of  historical changes  in market risk factors, which may not be
accurate predictors of future market conditions, and may not fully incorporate  the risk  of  extreme
market events that are outsized relative to observed historical market behavior or  reflect the historical
distribution of results beyond the confidence  interval; and reporting  of losses in  a single  day, which

81

does not reflect the risk of positions that  cannot be liquidated or hedged in one day. A  small
proportion of market risk generated  by trading positions is  not  included in  VaR.  The  modeling  of the
risk characteristics of some positions relies  on approximations that, under certain circumstances,  could
produce significantly different results from those produced using more precise measures.  VaR  is most
appropriate as a risk measure for trading  positions in liquid  financial markets and  will understate the
risk associated with severe events, such  as periods  of extreme  illiquidity.

The VaR calculation simulates the performance of the portfolio based on several years of  the daily
price changes of the underlying assets  and determines the VaR  as the  calculated loss that occurs  at the
99th percentile.

Since the reported VaR statistics are  estimates  based on historical data, VaR should not be viewed as
predictive of our future revenues or financial performance or of our  ability  to  monitor and  manage
risk. There can be no assurance that our  actual losses on a  particular  day will not exceed  the indicated
VaR or that such losses will not occur  more  than one time in  100 trading days. VaR  does not predict
the magnitude of losses which, should they occur, may be significantly greater than  the VaR amount.

Stress Test

We  estimate the market risk of our fixed income portfolio using a  risk analysis model provided by a
leading external vendor. For corporate  bonds, this stress test is configured to calculate  the change in
value of each fixed income security in  the portfolio over one  day in seven scenarios each  of  which
represents a parallel shift of the U.S.  Treasury yield  curve. The scenarios  are shifts of +/(cid:5)100, +/(cid:5)200
and +/(cid:5)300 basis points. For U.S. government securities, the stress test is configured to calculate the
change in value of each fixed income  security in the portfolio over one day in three scenarios each  of
which  represents a parallel shift of the  U.S. Treasury  yield curve. The scenarios are shifts of
+/(cid:5)25 basis points.

VaR and Stress Test Measures

Market Risk Category

Trading(1)

At December 31,
2017

At December 31,
2016

Average High
2017

2017

(in millions)

Equities and Currencies(2) . . . . . . .
Fixed Income(3) . . . . . . . . . . . . . .

Trading Total . . . . . . . . . . . . . . . . . .

Non-Trading(1)

Equities and Currencies . . . . . . . . .
Fixed Income, Other(4) . . . . . . . . .

Non-Trading Total . . . . . . . . . . . . . . .

$ 7
—

$ 7

$13
8

$21

$ 7
—

$ 7

$22
11

$33

$ 7
—

$ 7

$13
8

$21

$ 8
—

$ 8

$13
12

$25

(1) The product categories displayed in the table as ‘‘Trading’’ reflect activities undertaken in

the Company’s market making segment. The ‘‘Non-trading’’ category reflects  investment
activities and foreign currency exposures held in the equity of the Company’s non-market
making affiliates, i.e., its brokerage affiliates and information  technology affiliates. This
category also includes corporate segment activities in foreign exchange  designed to
achieve the Company’s currency diversification strategy.

The average and high VaR and stress test  amounts  are based  on the  four quarter ending
calculations performed in 2017.

82

(2) Equities and currencies held for market making  purposes are combined because  these

products are part of an integrated, hedged  market  making portfolio, on which the  risk is
measured using VaR.

(3) The Trading—Fixed Income category contains  primarily foreign government  securities

held in connection with market making activities  and a  small value of corporate bonds.
The risks on these products were managed separately  and  measured using the stress  test
analysis.

(4) The Non-Trading—Fixed Income,  Other  category  contains primarily U.S. government
securities held in segregated safekeeping accounts for the exclusive benefit of our
brokerage customers, on which the risk  is measured  using  a stress test analysis.

83

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Index to Consolidated Financial Statements

Report of Independent Registered Public Accounting  Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Financial  Condition as  of December  31, 2017 and 2016 . . . . . . . . . .
Consolidated Statements of Comprehensive Income for  the years ended December 31, 2017,

2016, and 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Cash Flows  for  the years ended December  31, 2017,  2016, and 2015 .
Consolidated Statements of Change in  Equity for  the years ended December 31, 2017, 2016, and

85
86

87
88

2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplementary Data—Unaudited Quarterly Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

89
90
131

84

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of
Interactive Brokers Group, Inc.
Greenwich, CT

Opinion on the Consolidated Financial Statements

We  have audited the accompanying consolidated statements of financial  condition  of  Interactive
Brokers Group, Inc. and subsidiaries  (the ‘‘Company’’) as of December 31, 2017 and 2016, the  related
consolidated statements of comprehensive  income, changes in equity,  and  cash flows, for each of the
three years in the period ended December  31, 2017 and the related notes  (collectively  referred to as
the ‘‘consolidated financial statements’’).  In  our  opinion, the consolidated financial statements present
fairly, in all material respects, the financial  position  of  the Company as  of December 31, 2017  and
2016, and the results of their operations  and  their  cash flows for each of the three years in  the period
ended December 31, 2017, in conformity with accounting  principles generally accepted in the United
States of America.

We  have also audited, in accordance  with the standards of  the Public Company Accounting Oversight
Board (United States) (PCAOB), the  Company’s  internal  control over financial reporting as  of
December 31, 2017, based on criteria established in Internal Control—Integrated Framework (2013)
issued by the Committee of Sponsoring  Organizations of the Treadway  Commission and our report
dated February 28, 2018 expressed an  unqualified opinion on the Company’s internal control  over
financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s  management. Our
responsibility is to express an opinion  on  the Company’s consolidated financial statements based on  our
audits. We are a public accounting firm registered with  the PCAOB  and are required  to  be
independent with respect to the Company in accordance  with the  U.S. federal securities  laws  and the
applicable rules and regulations of the Securities and Exchange  Commission and  the PCAOB.

We  conducted our audits in accordance  with the standards  of  the PCAOB. Those standards require
that we plan and perform the audit to  obtain reasonable assurance  about whether  the consolidated
financial statements are free of material misstatement,  whether  due to error or fraud.  Our audits
included performing procedures to assess  the  risks of material misstatement of the  consolidated
financial statements, whether due to  error or fraud, and performing procedures that respond  to  those
risks. Such procedures included examining, on a test basis, evidence regarding the  amounts and
disclosures in the consolidated financial  statements.  Our  audits also included  evaluating  the accounting
principles used and significant estimates made by management, as well as evaluating the overall
presentation of the consolidated financial  statements.  We believe  that our audits provide a reasonable
basis for our opinion.

/s/ Deloitte & Touche LLP
New York, New York
February 28, 2018

We  have served as the Company’s auditor since  1990.

85

Interactive Brokers Group, Inc. and Subsidiaries

Consolidated Statements of Financial Condition

(in millions,  except share amounts)

Assets
Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and securities—segregated for regulatory purposes . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities borrowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities purchased under agreements to resell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financial instruments owned, at fair value:

Financial instruments owned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financial instruments owned and pledged as collateral . . . . . . . . . . . . . . . . . . . . . . . . . .

Total financial instruments owned, at fair value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receivables:

Customers, less allowance for doubtful accounts  of $40  and  $97  as  of December 31,  2017

and 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brokers, dealers and clearing organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total receivables

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31,

2017

2016

$ 1,732
20,232
2,957
2,035

$ 1,925
24,017
3,629
111

1,950
1,204

3,154

2,104
1,933

4,037

29,821
823
116

30,760

292

19,409
1,040
57

20,506

448

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$61,162

$54,673

Liabilities and equity
Short-term borrowings
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities loaned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities sold under agreements to repurchase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financial instruments sold, but not yet  purchased, at  fair  value . . . . . . . . . . . . . . . . . . . . . .
Payables:

Customers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brokers, dealers and clearing organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Affiliate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accounts payable, accrued expenses and other  liabilities . . . . . . . . . . . . . . . . . . . . . . . . .
Interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total payables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

15
4,444
1,316
767

$

74
4,293
—
2,145

47,548
283
187
147
22

48,187

54,729

41,731
239
285
80
6

42,341

48,853

Commitments, contingencies and guarantees (see Note  12)
Equity
Stockholders’ equity

Common stock, $0.01 par value per share:
Class A—Authorized—1,000,000,000,  Issued—71,609,049  and  68,119,412  shares,

Outstanding—71,475,755 and 67,984,973 shares as  of December 31,  2017 and  2016 . . . . .

Class B—Authorized, Issued and Outstanding—100  shares as  of December  31, 2017  and

2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional paid-in capital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive income, net  of income taxes of $1  and  $0  as of

December 31, 2017  and 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treasury stock, at cost, 133,294  and  134,439  shares  as of  December  31, 2017 and  2016 . . . .

1

—
832
251

9
(3)

1

—
775
203

(2)
(3)

Total stockholders’  equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noncontrolling interests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,090
5,343

6,433

974
4,846

5,820

Total liabilities and equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$61,162

$54,673

See accompanying notes to the consolidated financial statements.

86

Interactive Brokers Group, Inc. and Subsidiaries

Consolidated Statements of Comprehensive Income

(in millions,  except share or per share amounts)

Revenues

Trading  gains
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

Total  revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest  expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total  net  revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation  and benefits . . . . . . . . . . . . . . . . .
Occupancy,  depreciation  and  amortization . . . . . . . . . . . . . .
Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General and administrative . . . . . . . . . . . . . . . . . . . . . . . .
Customer bad  debt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total non-interest expenses . . . . . . . . . . . . . . . . . . . . . . .

Income before  income  taxes . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less net income  attributable  to  noncontrolling  interests . . . .

Net income available  for common stockholders . . . . . . . . . . . .

Earnings per share

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Weighted average  common  shares outstanding

$

$

$

Year-Ended December 31,

2017

2016

2015

40
647
908
332

1,927
225

1,702

241
249
47
28
86
2

653

1,049
256

793
717

76

1.09

1.07

$

$

$

$

163
612
606
94

1,475
79

1,396

244
242
51
30
62
6

635

761
62

699
615

84

1.28

1.25

$

$

$

$

269
617
492
(122)

1,256
67

1,189

231
227
44
25
58
146

731

458
43

415
366

49

0.80

0.78

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

69,926,933

66,013,247

61,043,071

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

70,904,921

67,299,413

62,509,796

Comprehensive  income
Net income available  for  common stockholders . . . . . . . . . . . .

$

76

$

84

$

Other comprehensive income

Cumulative translation  adjustment,  before income taxes . .
Income taxes related  to  items  of  other  comprehensive

income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other comprehensive  income (loss),  net  of tax . . . . . . . . . . .

Comprehensive  income  available  for  common stockholders . . .

Comprehensive  income  attributable  to  noncontrolling interests

Net income attributable  to  noncontrolling interests . . . . . . .
Other comprehensive  income—cumulative  translation

adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

11

—

11

87

717

54

$

$

(4)

—

(4)

80

615

(21)

$

$

Comprehensive  income  attributable  to  noncontrolling interests .

$

771

$

594

$

49

(10)

—

(10)

39

366

(53)

313

See accompanying notes to the consolidated financial statements.

87

Interactive Brokers Group, Inc. and Subsidiaries

Consolidated Statements of Cash Flows

(in millions)

Cash flows from operating activities
Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments to  reconcile net income to net cash from operating activities

Deferred income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee stock plan compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized (gain) loss on other investments, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on remeasurement of Tax Receivable Agreement liability . . . . . . . . . . . . . . . . . . . . .
Bad debt  expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impairment loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Change in operating assets and liabilities

Cash and  securities—segregated for regulatory purposes . . . . . . . . . . . . . . . . . . . . . . . . .
Securities  borrowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities  purchased under agreements to resell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financial instruments owned, at fair value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receivables from customers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other receivables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities  loaned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities  sold under agreement to repurchase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financial instruments sold, but not yet purchased, at fair value . . . . . . . . . . . . . . . . . . . .
Payable  to  customers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other payables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year-Ended December 31,

2017

2016

2015

$

793

$

699

$

415

147
25
53
(4)
(93)
2
21

3,785
672
(1,924)
886
(10,414)
158
(3)
151
1,316
(1,378)
5,817
132

27
25
51
1
—
6
—

(2,708)
295
84
(647)
(2,365)
(342)
3
1,399
—
(454)
4,647
(177)

15
22
50
7
—
146
—

(5,905)
(264)
191
568
(144)
413
13
(305)
—
38
5,288
177

Net cash provided by operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

142

544

725

Cash flows from investing activities

Purchases of other investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distributions  received and proceeds from sales of other  investments . . . . . . . . . . . . . . . . .
Purchase  of property, equipment and intangible assets . . . . . . . . . . . . . . . . . . . . . . . . . .

Net cash used in investing activities

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cash flows from financing activities

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-term  borrowings, net
Dividends paid to stockholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distributions  to noncontrolling interests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repurchases of common stock for employee tax withholdings under stock incentive plans . . . .
Proceeds from the sale of treasury stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
Payments made under the Tax Receivable Agreement

Net cash used in financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Effect of exchange rate changes on cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . .

—
2
(28)

(26)

(59)
(28)
(272)
(21)
21
(15)

(374)

65

(17)
38
(27)

(6)

74
(26)
(219)
(26)
25
(17)

(189)

(25)

(16)
11
(30)

(35)

(34)
(25)
(227)
(25)
29
(13)

(295)

(63)

Net increase (decrease) in cash and cash equivalents
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and  cash  equivalents at beginning of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(193)
1,925

324
1,601

332
1,269

Cash and  cash  equivalents at end of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 1,732

$ 1,925

$ 1,601

Supplemental  disclosures of cash flow information

Cash paid for interest

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cash paid for taxes, net

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Non-cash financing activities

Issuance  of Common Stock in exchange of member interests in IBG LLC . . . . . . . . . . . . .

Redemption of member interests from IBG Holdings  LLC . . . . . . . . . . . . . . . . . . . . . . .

Adjustments to additional paid-in capital for changes in proportionate ownership in IBG LLC

Adjustments to noncontrolling interests for changes in proportionate ownership in IBG LLC .

Non-cash distribution to noncontrolling interests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

$

$

$

$

$

209

47

49

(49)

28

(28)

$

$

$

$

$

$

77

29

56

$

$

$

68

31

132

(56)

$ (132)

25

(25)

$

$

26

(26)

— $

(5)

$ —

See accompanying notes to the consolidated financial statements.

88

Interactive Brokers Group, Inc. and Subsidiaries

Consolidated Statements of Changes in  Equity

Three Years Ended December 31, 2017,  2016, and 2015

(in millions,  except share amounts)

Common  Stock

Issued
Shares

Par
Value

Additional
Paid-In
Capital

Accumulated
Other

Total

Non-

Treasury Retained Comprehensive Stockholders’ controlling Total
Interests Equity

Earnings

Income

Equity

Stock

8
9

.

.

.

.

.

.

.

.

.

.

.
.

.
.

.
.

.
.

.
.

.
.

.
.
Balance, December  31, 2014 .
.
.
Issuance of  common stock in  follow-on  offering .
.
.
Common stock distributed pursuant to  stock  incentive plans
.
.
Compensation  for  stock grants  vesting  in the  future .
Deferred tax benefit retained—follow-on offering .
.
.
.
Repurchases  of  common  stock for  employee  tax withholdings under stock incentive  plan .
.
.
.
.
Sales of treasury stock .
.
.
.
Dividends paid to  stockholders
.
.
.
Distributions from IBG LLC to noncontrolling  interests .
.
.
Adjustments  for  changes in proportionate  ownership  in IBG LLC .
.
.
.
.
Comprehensive  income .

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

Balance, December  31, 2015 .

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.
Issuance of  common stock in  follow-on  offering .
.
.
Common stock distributed pursuant to  stock  incentive plans
.
.
Compensation  for  stock grants  vesting  in the  future .
Deferred tax benefit retained—follow-on offering .
.
.
.
Repurchases  of  common  stock for  employee  tax withholdings under stock incentive  plan .
.
.
.
.
.
Sales of treasury stock .
.
.
Dividends paid to  stockholders
.
.
.
Distributions from IBG LLC to noncontrolling  interests .
.
.
Adjustments  for  changes in proportionate  ownership  in IBG LLC .
.
.
.
.
Comprehensive  income .

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

Balance, December  31, 2016 .

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.
Issuance of  common stock in  follow-on  offering .
.
.
Common stock distributed pursuant to  stock  incentive plans
.
.
Compensation  for  stock grants  vesting  in the  future .
Deferred tax benefit retained—follow-on offering .
.
.
.
Repurchases  of  common  stock for  employee  tax withholdings under stock incentive  plans
.
.
.
.
.
.
Sales of treasury stock .
.
.
Dividends paid to  stockholders
.
.
.
.
Distributions from IBG LLC to noncontrolling  interests .
.
.
Adjustments  for  changes in proportionate  ownership  in IBG LLC .
.
.
.
.
Comprehensive  income .

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.
.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

Balance, December  31, 2017 .

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.
.
.
.

.
.
.
.
.

.

.
.
.
.
.
.
.
.
.
.
.

.

.
.
.
.
.
.
.
.
.
.

.

.
.
.
.
.
.
.
.
.
.

.

. 58,612,245
3,021,778
.
.
2,487,127
.
.
.
.
.
.
.
.

. 64,121,150

1

1,596,200
2,402,062

.
.
.
.
.
.
.
.
.
.

. 68,119,412

1

1,214,860
2,274,777

.
.
.
.
.
.
.
.
.
.

$1

$635
39

$ (3)

$121

$ 12

9
5

4

26

718

22

8
2

25

775

18

9
2

28

(25)
25

(3)

(26)
26

(3)

(21)
21

(25)

49

145

(26)

84

203

(28)

76

(10)

2

(4)

(2)

11

$ 9

. 71,609,049

$1

$832

$ (3)

$251

See accompanying notes to the consolidated  financial  statements.

$ 766
39
—
9
5
(25)
29
(25)
—
26
39

863

22
—
8
2
(26)
26
(26)
—
25
80

974

18
—
9
2
(21)
21
(28)
—
28
87

$4,419
(39)

41

(227)
(26)
313

$5,185
—
—
50
5
(25)
29
(25)
(227)
—
352

4,481

5,344

(22)

43

(1)

(224)
(25)
594

—
—
51
2
(26)
25
(26)
(224)
—
674

4,846

5,820

(18)

44

(272)
(28)
771

—
—
53
2
(21)
21
(28)
(272)
—
858

$1,090

$5,343

$6,433

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements

1. Organization of Business

Interactive Brokers Group, Inc. (‘‘IBG, Inc.’’) is  a Delaware holding company whose primary asset is its
ownership of approximately 17.4% of the  membership interests of IBG LLC, which, in turn, owns
operating subsidiaries (collectively, ‘‘IBG  LLC’’). IBG,  Inc. together with IBG LLC and its consolidated
subsidiaries (collectively, ‘‘the Company’’), is an automated global  electronic broker and  market maker
specializing in executing and clearing  trades in securities, futures, foreign exchange instruments, bonds
and mutual funds on more than 120 electronic  exchanges and market centers around the world and
offering custody, prime brokerage, securities and  margin lending services to customers. In  the United
States of America (‘‘U.S.’’), the Company  conducts its  business  primarily from its  headquarters  in
Greenwich, Connecticut and from Chicago, Illinois. Abroad, the Company conducts its business through
offices located in Canada, the United Kingdom,  Switzerland, Liechtenstein, India, China (Hong Kong
and Shanghai), Japan, and Australia. As  of  December  31, 2017, the Company had 1,228  employees
worldwide.

IBG LLC is a Connecticut limited liability company  that conducts its business through its operating
subsidiaries (collectively, the ‘‘Operating  Companies’’): Interactive Brokers LLC (‘‘IB LLC’’);
Interactive Brokers (U.K.) Limited and  its subsidiary, Interactive Brokers (U.K.) Nominee Limited
(collectively, ‘‘IBUK’’); Interactive Brokers  (India) Private Limited (‘‘IBI’’); Timber Hill LLC
(‘‘TH LLC’’); Timber Hill Australia Pty  Limited (‘‘THA’’); Timber Hill Canada Company (‘‘THC’’);
Interactive Brokers Financial Products  S.A. (‘‘IBFP’’); Interactive Brokers Software Services (India)
Private Limited (‘‘IBSSI’’); IB Exchange  Corp. (‘‘IBEC’’)  and its subsidiaries;  Interactive  Brokers
Canada Inc. (‘‘IBC’’); Interactive Brokers Securities  Japan, Inc. (‘‘IBSJ’’); Interactive Brokers Hong
Kong Limited (‘‘IBHK’’); Interactive  Brokers Australia Pty  Limited and  its subsidiary, Interactive
Brokers Australia Nominees Pty Limited  (collectively, ‘‘IBA’’); IB Business Services (Shanghai)
Company Limited (‘‘IBBSS’’); Timber Hill Europe  AG and its subsidiary, Timber Hill (Liechtenstein)
AG (collectively, ‘‘THE’’); Interactive Brokers Hungary KFT (‘‘IBH’’); Interactive Brokers Software
Services Estonia OU (‘‘IBEST’’); Interactive Brokers  Software Services Russia (‘‘IBRUS’’);  Interactive
Brokers Corp. (‘‘IB Corp’’), Covestor, Inc.  and  its subsidiary,  Covestor Limited (collectively,
‘‘Covestor’’), and Greenwich Advisor Compliance Services Corp. (‘‘Greenwich Compliance’’).

The Company operates in two business segments:  electronic  brokerage and market making, both
supported by corporate. The Company  conducts  its  electronic brokerage business through certain
Interactive Brokers subsidiaries, which provide  electronic execution and clearing  services to customers
worldwide. The Company conducts its market making  business principally through its Timber Hill
subsidiaries on some of the world’s leading exchanges  and  market centers, primarily  in exchange-traded
equities, equity options and equity-index  options  and futures. (See Note 2—Discontinued Operations
and Costs Associated with Exit or Disposal  Activities.) Corporate enables the Company to operate
cohesively and effectively by providing  support via development services and control functions to the
business segments and also by executing  the Company’s currency diversification strategy.

Certain of the Operating Companies are members of various securities and commodities exchanges in
North America, Europe and the Asia/Pacific region and are subject  to  regulatory capital and other
requirements (see Note 14). IB LLC,  IBC, IBUK,  IBSJ, IBHK,  IBI and IBA  carry securities  accounts
for customers or perform custodial functions relating to customer securities.

90

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies

Basis of Presentation

These consolidated financial statements are presented in  U.S.  dollars  and have been prepared in
accordance with accounting principles generally accepted in the  U.S.  (‘‘U.S. GAAP’’) and  pursuant  to
the rules and regulations of the U.S.  Securities and Exchange Commission (‘‘SEC’’) regarding financial
reporting with respect to Form 10-K.

These consolidated financial statements include the accounts  of  the Company and its consolidated
subsidiaries and reflect all adjustments of a normal and  recurring nature that are, in  the opinion of
management, necessary for the fair presentation of the results for  the  periods  presented.

Principles of Consolidation, including Noncontrolling Interests

These consolidated financial statements include the accounts  of  IBG,  Inc.  and its majority  and wholly
owned subsidiaries. As sole managing member of  IBG LLC, IBG,  Inc. exerts control over IBG LLC’s
operations. In accordance with Financial Accounting Standards Board  (‘‘FASB’’) Accounting Standards
Codification (‘‘ASC’’) Topic 810, ‘‘Consolidation,’’ the Company consolidates IBG  LLC’s financial
statements and records the interests in IBG LLC that it  does not  own as  noncontrolling interests.

The Company’s policy is to consolidate  all other  entities in which it  owns more than 50% unless it does
not have control. All inter-company balances and  transactions have been eliminated.

Discontinued Operations and Costs Associated with  Exit or Disposal Activities

On March 8, 2017, the Company announced  its intention  to discontinue its options market making
activities globally. Additionally, as previously  announced, on September 29,  2017 the Company
completed the transfer of its U.S. options market making operations to Two Sigma Securities, LLC and
a gain on sale of $11 million, reflecting the recovery of exit costs, was recorded  in other income in the
consolidated statements of comprehensive  income. The Company will continue  to  phase out  its  options
market making operations outside of the  U.S. substantially over the  coming months  and expects to
report discontinued operations when  it meets  the criteria under FASB  Topic ASC 205-20,
‘‘Discontinued Operations.’’

Consistent with earlier estimates, the Company recognized  approximately $25  million in one-time
restructuring costs during the year ended  December  31, 2017. The one-time restructuring costs include
approximately $22 million of non-cash  expenditures, consisting of impairment of the  carrying value of
certain exchange trading rights and stock-based compensation, included in general  and administrative
expenses  and employee compensation  and benefits, respectively, and $3 million of  cash expenditures
primarily  related to severance costs for employee terminations, included employee  compensation and
benefits, in the consolidated statements of  comprehensive  income.

Use  of Estimates

The preparation of financial statements in  conformity with  U.S. GAAP  requires management  to  make
estimates and assumptions that affect  the reported amounts and  disclosures in  these consolidated
financial statements and accompanying  notes. These  estimates and  assumptions  are based  on judgment
and  the best available information at  the time. Therefore, actual results could differ materially from
those estimates. Such estimates include  the allowance for doubtful accounts,  valuation of certain
investments, compensation accruals, current and deferred income  taxes, costs associated with exit  or
disposal activities, and contingency reserves.

91

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Fair Value

Substantially all of the Company’s assets and liabilities, including financial instruments are carried at
fair value based on published market prices and are marked to market, or are assets and liabilities
which are short-term in nature and are carried at amounts that  approximate fair value.

The Company applies the fair value hierarchy in accordance with FASB ASC  Topic 820,  ‘‘Fair Value
Measurement’’ (‘‘ASC Topic 820’’), to prioritize  the inputs to valuation techniques  used to measure fair
value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for
identical assets and liabilities and the lowest priority to unobservable inputs. The three levels of the fair
value hierarchy are:

Level 1 Unadjusted quoted prices in active markets that are accessible at  the measurement

date for identical, unrestricted assets or  liabilities.

Level 2 Quoted prices for similar assets in  an active market, quoted  prices in markets that

are not considered to be active or financial  instruments for which  all significant
inputs are observable, either directly or  indirectly.

Level 3 Prices or valuations that require  inputs  that are both significant to fair value

measurement and unobservable.

Financial instruments owned, at fair value and financial instruments  sold, but not yet purchased,  at fair
value are generally classified as Level 1  of the  fair value hierarchy. The Company’s Level 1 financial
instruments, which are valued using quoted market prices  as published by exchanges and clearing
houses or otherwise broadly distributed in  active markets, include active listed stocks,  options, warrants
and discount certificates, and U.S. and  foreign  government securities. The Company  does not adjust
quoted prices for financial instruments  classified as  Level 1 of the  fair value hierarchy, even in the
event that the Company may hold a  large position whereby a purchase or  sale could reasonably impact
quoted prices.

Currency forward contracts are valued using broadly distributed bank  and broker prices, and  are
classified as Level 2 of the fair value  hierarchy since inputs to their valuation  can be generally
corroborated by market data. Other securities that are not  traded in active markets are also classified
in Level 2 of the fair value hierarchy.  Level 3 financial instruments are comprised of securities that
have been delisted or otherwise are no longer tradable in  active  markets and  have been valued  by  the
Company based on internal estimates.

Earnings per Share

Earnings per share (‘‘EPS’’) is computed  in accordance with FASB  ASC Topic 260, ‘‘Earnings per
Share.’’ Basic EPS is computed by dividing the net income  available for  common  stockholders  by  the
weighted average number of shares outstanding for that period. Diluted EPS is calculated by dividing
the net income available for common stockholders by the diluted weighted average shares outstanding
for that period. Diluted EPS includes the determinants  of the basic EPS  and, in addition,  reflects the
dilutive effect of shares of common stock  estimated to be distributed in the  future under the
Company’s stock-based compensation plans, with no adjustments to net  income  available for common
stockholders for dilutive potential common  shares.

92

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Stock-Based Compensation

The Company follows FASB ASC Topic 718, ‘‘Compensation—Stock  Compensation’’ (‘‘ASC
Topic 718’’), to account for its stock-based  compensation plans. ASC  Topic  718 requires all share-based
payments to employees to be recognized in the  consolidated financial statements using  a fair value-
based method. Grants, which are denominated in  U.S. dollars,  are  communicated to employees in the
year of grant, thereby establishing the  fair value of each grant. The fair value of  awards  granted to
employees are generally expensed as  follows:  50% in  the year  of  grant in recognition of the plans’
post-employment provisions (as described  below) and the remaining 50% over the related vesting
period  utilizing the ‘‘graded vesting’’ method permitted under ASC Topic 718. In the case  of
‘‘retirement eligible’’ employees (those  employees older  than 59),  100%  of awards are expensed when
granted.

Awards granted under stock-based compensation  plans are  subject to the plans’ post-employment
provisions in the event an employee  ceases  employment  with the  Company. The plans provide that
employees who discontinue employment with the  Company without cause and continue  to  meet the
terms of the plans’ post-employment provisions will be eligible to earn 50%  of previously  granted but
not yet earned awards, unless the employee  is over  the age of 59,  in which  case the employee  would be
eligible to receive  100% of previously  granted  but  not yet earned awards.

Cash and Cash Equivalents

Cash and cash equivalents consist of  deposits with  banks and all highly liquid investments, with
maturities of three months or less, that  are  not  segregated and  deposited for  regulatory purposes or to
meet margin requirements at clearing houses.

Cash and Securities—Segregated for Regulatory Purposes

As a  result of customer activities, certain  Operating Companies are obligated by rules mandated  by
their primary regulators to segregate or set aside cash or qualified securities to satisfy  such regulations,
which have been promulgated to protect customer assets. Securities  segregated  for regulatory purposes
consisted of U.S. government securities of $4.5 billion and $7.4 billion as  of  December 31, 2017 and
December 31, 2016, respectively, and securities purchased under agreements  to  resell  in the amount of
$9.2 billion and $11.0 billion as of December 31, 2017 and December 31, 2016,  respectively, which
amounts approximate fair value.

Securities Borrowed and Securities Loaned

Securities borrowed and securities loaned are recorded at the amount of the  cash collateral advanced
or received. Securities borrowed transactions require  the Company  to  provide  counterparties with
collateral, which may be in the form of cash, letters  of credit or other securities. With respect to
securities loaned, the Company receives collateral, which may be in the form of cash  or other securities
in an amount generally in excess of the fair value  of  the securities loaned. The  Company monitors  the
market value of securities borrowed and  loaned on a daily basis, with  additional collateral obtained or
refunded  as permitted contractually. It is the  Company’s  policy to net, in  the consolidated statements of
financial condition, securities borrowed and securities loaned  entered into with the  same counterparty
that meet the offsetting requirements prescribed in  FASB ASC Topic 210-20, ‘‘Balance Sheet—
Offsetting’’ (‘‘ASC Topic 210-20’’).

93

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Securities lending fees received and paid  by the Company are  included  in interest income and  interest
expense, respectively, in the consolidated statements of comprehensive  income.

Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase

Securities purchased under agreements  to  resell and securities sold under agreements to repurchase,
which are reported as collateralized financing transactions, are recorded at contract  value, which
approximates fair value. To ensure that the fair  value of the underlying collateral remains sufficient,  the
collateral is valued daily with additional  collateral obtained or excess collateral returned, as permitted
under contractual provisions. It is the Company’s  policy to net,  in the consolidated statements of
financial condition, securities purchased under agreements to resell  transactions and securities sold
under agreements to repurchase transactions entered into with the  same counterparty that meet the
offsetting requirements prescribed in ASC Topic 210-20.

Financial Instruments Owned and Financial Instruments  Sold, But Not  Yet Purchased, at Fair Value

Financial instrument transactions are accounted for on a trade date  basis. Financial instruments owned
and  financial instruments sold, but not yet purchased are stated at fair  value based upon  quoted market
prices. The Company’s financial instruments  pledged to counterparties where the counterparty has  the
right, by contract or custom, to sell or repledge the financial instruments are  reported as financial
instruments owned and pledged as collateral in the consolidated statements of financial condition.

Customer Receivables and Payables

Customer securities transactions are recorded  on a settlement  date basis and  customer commodities
transactions are recorded on a trade  date  basis. Receivables from and payables to customers  include
amounts due on cash and margin transactions, including  futures contracts transacted on behalf of
customers. Securities owned by customers, including those that collateralize margin  loans or other
similar transactions, are not reported in  the consolidated statements  of financial condition. Amounts
receivable from customers that are determined  by management to be uncollectible  are recorded as
customer bad debt expense in the consolidated  statements of comprehensive income.

Receivables from and Payables to Brokers, Dealers and Clearing Organizations

Receivables from and payables to brokers,  dealers and clearing organizations include net receivables
and  payables from unsettled trades, including  amounts related to futures and options on  futures
contracts executed on behalf of customers, amounts receivable for  securities not delivered by the
Company to the purchaser by the settlement date (‘‘fails to deliver’’)  and  cash deposits. Payables to
brokers, dealers and clearing organizations also include  amounts payable for  securities not received by
the Company from a seller by the settlement date (‘‘fails to  receive’’).

Investments

The Company makes certain strategic  investments  related  to its business and  accounts for  these
investments under the cost method of accounting or under the  equity method of accounting  as required
under FASB ASC Topic 323, ‘‘Investments—Equity Method and Joint Ventures.’’ Investments
accounted for under the equity method, including  where the investee is a limited partnership  or limited
liability  company, are recorded at the  fair value amount of the Company’s initial investment  and are

94

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

adjusted each period for the Company’s share of the investee’s  income  or loss. The Company’s  share of
the income or losses from equity method investments is included in  other  income  in the consolidated
statements of comprehensive income. The recorded  amounts of the  Company’s equity  method
investments, $23 million as of December 31,  2017 ($22 million as  of  December  31, 2016), which  are
included in other assets in the consolidated statements of financial condition,  increase or decrease
accordingly. Contributions paid to and distributions  received from equity method  investees  are recorded
as additions or reductions, respectively, to the respective investment  balance.

The Company also holds exchange memberships and investments in equity securities of certain
exchanges, as required to qualify as a clearing member,  and strategic investments in corporate stock
that do not qualify for equity method accounting. Such investments, $11 million as of December 31,
2017 ($33 million as of December 31,  2016), are recorded at cost or, if  an other-than-temporary
impairment in value has occurred, at  a value  that reflects management’s estimate of the  impairment,
and  are also included in other assets  in the  consolidated statements of financial condition. Dividends
received from cost basis investments are included in other income in the  consolidated  statements of
comprehensive income when such dividends are received.

A judgmental aspect of accounting for investments  is evaluating whether an other-than-temporary
decline in the value of an investment has occurred. The evaluation of an other-than-temporary
impairment is dependent on specific quantitative and qualitative factors  and circumstances surrounding
an investment, including recurring operating losses, credit  defaults and subsequent rounds of financing.
The Company’s equity investments do not have readily  determinable market values. All  investments are
reviewed for changes in circumstances or occurrence of  events  that suggest  the Company’s investment
may not be recoverable. If an unrealized loss  on  any  investment is considered to be
other-than-temporary, the impairment loss  is recognized in the period the determination is made.

Property, Equipment, and Intangible Assets

Property, equipment, and intangible assets, which are included  in other assets in the consolidated
statements of financial condition, consist  of leasehold improvements,  computer equipment, software
developed for the Company’s internal use,  office furniture, equipment and  acquired  technology.

Property and equipment are recorded at historical cost,  less accumulated depreciation and
amortization. Additions and improvements  that extend  the lives of  assets are capitalized, while
expenditures for repairs and maintenance are expensed as incurred. Depreciation and amortization are
computed using the straight-line method. Equipment  is depreciated over  the estimated useful  lives of
the assets, while leasehold improvements are amortized  over  the lesser of the  estimated economic
useful life of the asset or the term of the lease. Computer equipment is  depreciated over  three to five
years and office furniture and equipment are depreciated  over  five  to  seven years. Intangible assets
with a finite life are amortized on a straight  line basis  over  their  estimated useful lives of  three years,
and  tested for recoverability whenever events indicate that the carrying amounts may not be
recoverable. Qualifying costs for internally developed  software are capitalized and amortized  over the
expected useful life of the developed  software, not to exceed  three  years.  Upon retirement  or
disposition of property and equipment,  the cost and  related  accumulated  depreciation are removed
from the consolidated statements of financial condition and any  resulting gain or loss is  recorded in
other  income in the consolidated statements  of  comprehensive income.  Fully depreciated (or
amortized) assets are retired on an annual basis.

95

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Comprehensive Income and Foreign Currency Translation

The Company’s operating results are reported  in the consolidated  statements of comprehensive  income
pursuant to FASB ASC Topic 220, ‘‘Comprehensive  Income.’’

Comprehensive income consists of two components: net income and other comprehensive  income
(‘‘OCI’’). The Company’s OCI is comprised  of  gains and losses resulting  from translating foreign
currency financial  statements of non-U.S. subsidiaries, net of related income taxes, where applicable. In
general, the practice and intention of the Company  is to reinvest the earnings of its non-U.S.
subsidiaries in those operations, therefore  tax is usually not accrued  on OCI.

The Company’s non-U.S. domiciled subsidiaries have a functional currency that is other  than the U.S.
dollar. Such subsidiaries’ assets and liabilities are translated into U.S.  dollars at period-end exchange
rates, and revenues and expenses are translated  at  average  exchange  rates  prevailing during the period.
Adjustments that result from translating amounts from  a  subsidiary’s functional  currency  to  the U.S.
dollar (as described above) are reported net of tax, where applicable, in accumulated OCI in the
consolidated statements of financial condition.

Revenue Recognition

Trading Gains

Trading gains and losses are recorded  on  trade  date and are  reported on a  net basis. Trading gains and
losses are comprised of changes in the  fair value of financial instruments  owned, at  fair value  and
financial instruments sold, but not yet purchased,  at  fair value (i.e.,  unrealized gains  and losses) and
realized  gains and losses related to the Company’s market making business segment. Included in
trading gains are net gains and losses  on  stocks, U.S. and foreign government  securities, options,
futures, foreign exchange and other derivative instruments. Dividends are integral to the valuation of
stocks and interest is integral to the valuation of fixed income instruments. Accordingly, both dividends
and  interest income and expense attributable to financial instruments owned, at fair value and  financial
instruments sold, but not yet purchased,  at  fair value are reported  on  a  net basis in trading gains in  the
consolidated statements of comprehensive  income.

Commissions

Commissions earned for executing and/or  clearing transactions are accrued on  a trade date basis and
are reported as commissions in the consolidated statements of comprehensive income.

Interest  Income and Expense

The Company earns interest income  and  incurs  interest expense primarily in connection with its
electronic brokerage customer business  and  its securities lending  activities, which are recorded on an
accrual basis and are included in interest  income  and interest expense, respectively,  in the consolidated
statements of comprehensive income.

96

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Foreign Currency Gains and Losses

Foreign currency balances are assets  and  liabilities in currencies other than  the Company’s  functional
currency. At every reporting date, the  Company revalues its  foreign currency balances to its functional
currency at the spot exchange rate and records  the associated foreign currency gains and losses.  These
foreign currency gains and losses are reported  in the consolidated  statements of comprehensive  income,
as follows: (a) foreign currency gains  and losses related to the Company’s currency diversification
strategy are reported in other income; (b) foreign currency gains and losses related  to  the market
making  core-business activities are reported  in trading gains; (c) foreign currency gains  and losses
arising from currency swap transactions in the electronic  brokerage business are reported  in interest
income; and (d) all other foreign currency gains and losses are  reported in other income.

Rebates

Rebates consist of volume discounts, credits  or  payments received from  exchanges or other  market
centers related to the placement and/or removal  of  liquidity from the order flow in the  marketplace
and  are recorded on an accrual basis.  Rebates are recorded net within execution and clearing  expenses
in the  consolidated statements of comprehensive income. Rebates  received  for trades executed  on
behalf of customers that elect tiered pricing are passed, in whole or part,  to  these customers;  and such
pass-through amounts are recorded net within commissions in  the consolidated statements of
comprehensive income.

Income Taxes

The Company accounts for income taxes  in accordance  with FASB ASC  Topic 740,  ‘‘Income Taxes’’
(‘‘ASC Topic 740’’). The Company’s income tax expense,  deferred tax assets and liabilities, and reserves
for unrecognized tax benefits are based on enacted tax laws (see Note 10) and  reflect management’s
best assessment of estimated future taxes to be paid. The Company is subject to income taxes in the
U.S. and numerous foreign jurisdictions. Determining income tax expense requires significant
judgments and estimates.

Deferred income tax assets and liabilities  arise from temporary differences between the tax and
financial statements recognition of underlying assets and liabilities. In evaluating the  ability  to  recover
deferred tax assets within the jurisdictions from which they arise, the Company  considers all available
positive and negative evidence, including scheduled reversals of deferred  tax liabilities,  projected future
taxable income, tax-planning strategies, and results of  recent operations. In  projecting  future taxable
income, historical results are adjusted for  changes  in accounting policies and incorporate  assumptions
including the amount of future state, federal  and  foreign pre-tax operating income, the reversal of
temporary differences, and the implementation of feasible and  prudent tax-planning strategies. These
assumptions require significant judgment  about the  forecasts  of  future taxable  income  and are
consistent with the plans and estimates the Company is using to manage the underlying businesses.  In
evaluating the objective evidence that historical results provide, three years  of  cumulative operating
income (loss) are considered. Deferred income taxes have not been  provided  for U.S. tax liabilities or
for additional foreign taxes on the unremitted earnings of foreign subsidiaries that have  been
indefinitely reinvested.

97

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

The calculation of the Company’s tax liabilities  involves dealing with  uncertainties in the application of
complex tax laws and regulations in a  multitude of jurisdictions across the Company’s  global operations.
Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the  future.
On December 22, 2017, the Tax Cuts and Jobs Act (the ‘‘Tax Act’’)  was enacted, significantly revising
the U.S corporate income tax law by,  among  other things, reducing the  corporate income tax rate from
35% to 21% and implementing a modified  territorial tax system that  includes a one-time transition tax
on deemed repatriated earnings of foreign subsidiaries (see Note  10).

The Company records tax liabilities in accordance  with ASC Topic 740 and  adjusts  these liabilities  when
management’s judgment changes as a result of the evaluation of new  information not previously
available. Because of the complexity of some of these uncertainties, the  ultimate resolution may result
in payments that are different from the current  estimates of these  tax liabilities. These differences  will
be reflected as increases or decreases to income tax  expense in the period in  which new  information
becomes available.

The Company recognizes a tax benefit  from  an uncertain  tax position only when it  is more likely than
not that the position will be sustained upon examination, including resolutions of any related appeals or
litigation processes, on the basis of the technical merits. A tax  position  that  meets this standard is
measured at the largest amount of benefit that will  more likely  than not be realized on settlement.

The Company recognizes interest related to income tax matters as interest income or interest expense
and  penalties related to income tax matters  as income  tax expense  in the consolidated statements of
comprehensive income.

Recently Issued Accounting Pronouncements

Following is a summary of recently issued FASB Accounting Standards Updates (‘‘ASUs’’)  that  have
affected or may affect the Company’s consolidated financial statements:

Affects

Status

ASU 2016-01 Financial Instruments—Overall

(Subtopic 825-10): Recognition and
Measurement of Financial Assets and
Financial Liabilities.

ASU 2016-02 Leases  (Topic 842): Requires the

recognition of a right-of-use asset and  a
lease liability for leases previously
classified as operating leases in the
statements of financial condition.

ASU 2016-08 Revenue from Contracts with Customers

(Topic  606): Principal versus Agent
Considerations (Reporting Revenue Gross
versus Net).

ASU 2016-10 Revenue from Contracts with Customers

(Topic  606): Identifying Performance
Obligations and Licensing.

Effective for fiscal years beginning after
December 15, 2017.

Effective for fiscal years beginning after
December 15,  2018.

Effective for annual reporting periods
beginning  after December 15, 2017.

Effective for annual reporting periods
beginning after December 15, 2017.

98

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Affects

Status

ASU 2016-13 Financial Instruments—Credit Losses
(Topic  326): Measurement of Credit
Losses on Financial Instruments.

ASU 2016-15

Statement of Cash Flows (Topic 230):
Classification of Certain Cash Receipts
and Cash Payments.

Effective for fiscal years beginning after
December 15, 2019.

Effective for fiscal years beginning after
December  15, 2017.

ASU 2016-16

Income Taxes (Topic 740): Intra-Entity
Transfers of Assets Other Than Inventory.

Effective for annual  reporting periods
beginning after December 15, 2017.

ASU 2017-01 Business Combinations (Topic 805):

Clarifying the Definition of a Business.

Effective for annual periods beginning
after December 15, 2017.

ASU 2017-04

Intangibles—Goodwill and Other
(Topic  350): Simplifying the Test for
Goodwill Impairment.

ASU 2017-05 Other Income—Gains and Losses from the

Derecognition of Nonfinancial Assets
(Subtopic 610-20): Clarifying the Scope of
Asset Derecognition Guidance and
Accounting for Partial Sales of
Nonfinancial Assets.

Effective for fiscal years beginning after
December 15,  2019.

Effective for annual reporting periods
beginning after December 15, 2017.

ASU 2017-08 Receivables—Nonrefundable Fees and Other Effective for fiscal years, and interim

Costs (Subtopic 310-20): Amending the
amortization period for certain purchased
callable debt securities held at a premium.

periods within those fiscal years, beginning
after December 15, 2018.

ASU 2017-09 Compensation—Stock Compensation

(Topic  718): Providing clarity and reduce
both diversity in practice and cost and
complexity when applying the guidance in
Topic 718, Compensation—Stock
Compensation, to a change to the terms
or conditions of a share-based payment
award.

ASU 2017-11 Earnings Per Share (Topic 260)

Distinguishing Liabilities from Equity
(Topic  480) Derivatives and Hedging
(Topic  815): Changing the classification
analysis of certain equity-linked financial
instruments (or embedded features)  with
down round features.

Effective for annual periods, and interim
periods within  those annual  periods,
beginning after December 15, 2017.

Effective for fiscal years, and interim
periods within those fiscal years, beginning
after December 15, 2018.

ASU 2017-12 Derivatives and Hedging (Topic 815):

Targeted Improvements to Accounting for
Hedging Activities.

Effective for fiscal years, and interim
periods within those fiscal years, beginning
after December  15, 2018.

99

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Affects

Status

ASU 2018-02

Income Statement—Reporting
Comprehensive Income (Topic 220):
Reclassification of Certain Tax Effects
from Accumulated Other Comprehensive
Income.

Effective for fiscal years, and interim
periods  within  those  fiscal  years,  beginning
after December 15, 2018.

Adoption of those ASUs that became effective during 2017  and 2018,  prior to the  issuance  of  the
Company’s consolidated financial statements, did not have a material effect on these financial
statements.

The Company has reviewed the impact  of FASB ASC Topic  606, ‘‘Revenue from Contracts with
Customers’’ (‘‘ASC Topic 606’’), and identified similar performance obligations under ASC Topic  606 as
compared with deliverables and separate  units of account  previously  identified,  as a result  the Company
expects the timing of its revenue recognition  to  remain  the same as compared to FASB ASC Topic 605,
‘‘Revenue Recognition.’’ The Company  adopted  ASC  Topic 606  using  the modified retrospective
method, effective January 1, 2018.

3. Trading Activities and Related Risks

The Company’s trading activities include providing  securities market making  and brokerage services.
Trading activities expose the Company  to  market and  credit risks.  These risks are managed in
accordance with established risk management policies and  procedures.  To accomplish  this,  management
has established a risk management process  that includes:

(cid:127) a regular review of the risk management  process by executive management as part of its

oversight role;

(cid:127) defined risk management policies and  procedures supported by  a  rigorous analytic framework;

and

(cid:127) articulated risk tolerance levels as defined by  executive  management that are regularly reviewed
to ensure that the Company’s risk-taking is consistent  with its business strategy,  capital structure,
and current and anticipated market conditions.

100

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

3. Trading Activities and Related Risks (Continued)

Market Risk

The Company is exposed to various market risks. Exposures to market risks arise  from equity price
risk, foreign currency exchange rate fluctuations and changes in  interest  rates. The  Company seeks to
mitigate market risk associated with trading  inventories by employing hedging strategies that correlate
rate, price and spread movements of trading  inventories and  related  financing and  hedging activities.
The Company uses a combination of cash instruments  and exchange  traded  derivatives to hedge its
market exposures. The Company does  not apply hedge accounting. The following discussion  describes
the types of market risk faced:

Equity Price Risk

Equity price risk arises from the possibility that equity security prices will fluctuate,  affecting the
value of equity securities and other instruments that derive their value from  a particular stock, a
defined basket of stocks, or a stock index. The Company  is subject to equity price risk primarily in
financial instruments owned, at fair value and  financial instruments sold, but not yet  purchased, at
fair value. The Company attempts to limit  such risks by continuously reevaluating prices and  by
diversifying its portfolio across many different options, futures and underlying securities and
avoiding concentrations of positions based on  the same underlying security.

Currency Risk

Currency risk arises from the possibility  that fluctuations in foreign exchange rates will impact the
value of financial instruments. The Company manages  this risk using spot (i.e., cash) currency
transactions, currency futures contracts and currency forward contracts.  As a global  electronic
broker and market maker trading on exchanges around the world  in multiple currencies, the
Company is exposed to foreign currency risk.  The Company actively  manages its currency exposure
using  a currency diversification strategy  that is based  on  a defined  basket of 14 currencies
internally referred to as the ‘‘GLOBAL.’’ These strategies minimize the fluctuation of the
Company’s net worth as expressed in GLOBALs, thereby diversifying  its risk in  alignment with
these global currencies, weighted by the  Company’s  view of their importance. As the Company’s
financial results are reported in U.S. dollars, the change in the  value  of the GLOBAL as  expressed
in U.S. dollars affects the Company’s  earnings. The impact  of  this  currency  diversification  strategy
in the  Company’s earnings is included in other income in  the consolidated statements of
comprehensive income. In light of the Company’s decision to discontinue its options market
making  activities globally, the Company  removed the Singapore dollar (SGD)  and realigned  the
relative weight of the U.S. dollar (USD) versus  the other currency components to better reflect its
businesses going forward. The new composition  went into effect  as of the close of business on
March 31, 2017.

Interest  Rate Risk

Interest rate risk arises from the possibility  that changes  in interest rates will  affect the value of
financial instruments. The Company is exposed  to  interest rate risk on cash and margin balances,
positions carried in equity and fixed income  securities, options,  futures and on  its  borrowings.
These risks are managed through investment policies and by  entering into interest rate futures
contracts.

101

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

3. Trading Activities and Related Risks (Continued)

Credit Risk

The Company is exposed to risk of loss  if an individual,  counterparty or issuer fails to perform its
obligations under contractual terms (‘‘default  risk’’).  Both cash  instruments and derivatives expose the
Company to default risk. The Company has established policies and procedures  for mitigating credit
risk on principal transactions, including reviewing and establishing limits for credit  exposure,
maintaining collateral, and continually  assessing the creditworthiness of counterparties.

The Company’s credit risk is limited in that substantially all of the contracts entered  into  are settled
directly at securities and commodities clearing houses and a small portion is  settled through member
firms and banks with substantial financial and operational resources. The Company seeks  to  control  the
risks associated with its customer margin activities by requiring customers  to  maintain  collateral  in
compliance with regulatory and internal  guidelines.

In the normal course of business, the  Company executes, settles,  and finances various  customer
securities transactions. Execution of these transactions includes the  purchase  and sale of securities
which exposes the Company to default  risk arising from the  potential that customers  or counterparties
may fail to satisfy their obligations. In  these  situations, the Company  may  be  required to purchase or
sell financial instruments at unfavorable market prices  to  satisfy obligations  to  customers  or
counterparties. Liabilities to other brokers and dealers related to unsettled  transactions (i.e., securities
fails to receive) are recorded at the amount  for which  the securities were purchased, and  are paid upon
receipt of the securities from other brokers or dealers. In the case of aged  securities fails to receive,
the Company may purchase the underlying security in  the market and seek reimbursement for any
losses from the counterparty.

For cash management purposes, the Company enters  into  short-term securities purchased under
agreements to resell and securities sold under agreements to  repurchase  transactions (‘‘repos’’)  in
addition to securities borrowing and lending arrangements, all of which may result  in credit  exposure in
the event the counterparty to a transaction is unable to fulfill its contractual obligations. Repos are
collateralized by securities with a market value in excess of the obligation  under the contract. Similarly,
securities lending agreements are collateralized by deposits  of  cash or securities. The Company
attempts to minimize credit risk associated  with these activities by  monitoring collateral values on  a
daily basis and requiring additional collateral to be deposited with  or  returned to the Company as
permitted under contractual provisions.

Concentrations of Credit Risk

The Company’s exposure to credit risk associated with its trading and other activities is measured  on an
individual counterparty basis, as well as by groups  of  counterparties  that share similar attributes.
Concentrations of credit risk can be affected by changes in political,  industry,  or economic  factors. To
reduce the potential for risk concentration, credit  limits are established and exposure is  monitored in
light of changing counterparty and market conditions. As of December 31, 2017,  the Company did  not
have  any material concentrations of credit  risk outside the ordinary course of business.

102

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

3. Trading Activities and Related Risks (Continued)

Off-Balance Sheet Risks

The Company may be exposed to a risk of  loss not  reflected  in the consolidated financial statements to
settle futures and certain over-the-counter contracts  at  contracted  prices, which may  require repurchase
or sale of the underlying products in the market at prevailing  prices. Accordingly, these transactions
result in off-balance sheet risk as the  Company’s cost to liquidate such contracts may exceed the
amounts reported in the Company’s consolidated  statements of financial condition.

4. Equity and Earnings per Share

In connection with IBG, Inc.’s initial  public offering of  Class A common stock (‘‘IPO’’) in May 2007, it
purchased 10.0% of the membership  interests  in IBG LLC from IBG Holdings LLC  (‘‘Holdings’’),
became  the sole managing member of  IBG  LLC and  began to consolidate IBG  LLC’s financial results
into its  financial statements. Holdings owns  all of IBG, Inc.’s  Class  B common stock, which has voting
rights in proportion to its ownership  interests  in IBG LLC. The  table  below shows the  amount  of
IBG LLC membership interests held by IBG,  Inc. and Holdings as of  December 31, 2017.

Ownership % . . . . . . . . . . . . . . . . . . . . . .
Membership interests . . . . . . . . . . . . . . . . .

17.4%

82.6%

100.0%

71,479,604

340,229,444

411,709,048

IBG, Inc.

Holdings

Total

These consolidated financial statements reflect the results  of  operations and financial position of
IBG, Inc., including consolidation of its  investment in IBG LLC and its  subsidiaries.  The  noncontrolling
interests in IBG LLC attributable to  Holdings are  reported as a component of  total  equity in the
consolidated statements of financial condition.

Recapitalization and Post-IPO Capital Structure

Immediately prior to and immediately  following the consummation of the IPO,  IBG, Inc.,  Holdings,
IBG LLC and the  members of IBG LLC consummated a series of  transactions collectively  referred to
herein as the ‘‘Recapitalization.’’ In connection with the Recapitalization, IBG, Inc., Holdings and  the
historical members of IBG LLC entered into an exchange agreement,  dated  as of May 3, 2007  (the
‘‘Exchange Agreement’’), pursuant to  which the historical members of IBG LLC  received  membership
interests in Holdings in exchange for  their  membership interests in  IBG  LLC. Additionally,  IBG, Inc.
became the sole managing member of  IBG LLC.

In connection with the consummation of  the IPO,  Holdings  used  the net proceeds to redeem  10.0% of
members’ interests in Holdings in proportion to their  interests. Immediately  following  the
Recapitalization and IPO, Holdings owned  approximately 90% of IBG LLC and 100% of  IBG, Inc.’s
Class B common stock, which has voting  power  in IBG, Inc. in  proportion to Holdings’ ownership of
IBG LLC.

103

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

4. Equity and Earnings per Share (Continued)

Since  consummation of the IPO and Recapitalization, IBG, Inc.’s equity  capital structure has been
comprised of Class A and Class B common  stock. All shares of common stock have a  par value of
$0.01 per share and have identical rights to earnings and  dividends and in  liquidation. As of
December 31, 2017 and December 31, 2016, 1,000,000,000  shares  of  Class A common stock were
authorized, of which 71,609,049 and 68,119,412 shares have been issued; and  71,475,755 and  67,984,973
shares were outstanding, respectively. Class B common stock  is comprised  of 100 authorized shares,  of
which 100 shares were issued and outstanding as of December 31, 2017  and December 31,  2016,
respectively. In addition, 10,000 shares of preferred stock have been  authorized,  of  which no shares are
issued  or outstanding as of December  31, 2017 and  December 31,  2016, respectively.

As a  result of a federal income tax election made by IBG LLC applicable to the  acquisition  of
IBG LLC member interests by IBG, Inc.,  the income tax  basis of the assets  of  IBG LLC acquired by
IBG, Inc. have been adjusted based on the amount paid for such interests. Deferred tax assets  were
recorded as of the IPO date and in connection with subsequent  redemptions of Holdings member
interests in exchange for common stock.  These deferred tax  assets are included in other  assets in the
Company’s consolidated statements of financial  condition  and are being amortized  as additional
deferred income tax expense over 15 years from the IPO date  and from the  additional redemption
dates, respectively, as allowable under current tax law. As of December 31, 2017 and December  31,
2016, the unamortized balance of these deferred tax assets was  $146 million and  $273 million,
respectively (see Note 10 for effects  of the  Tax Act).

IBG, Inc. also entered into an agreement (the ‘‘Tax Receivable Agreement’’) with Holdings  to  pay
Holdings (for the benefit of the former members of IBG LLC)  85% of  the  tax savings that IBG, Inc.
actually realizes as the result of tax basis increases. These payables to Holdings are reported  as payable
to affiliate in the Company’s consolidated statements  of  financial  condition.  The  remaining  15% is
accounted for as a permanent increase  to  additional paid-in capital in  the Company’s consolidated
statements of financial condition. As  a  result  of  the reduction  of the corporate rate  from 35% to 21%
under the Tax Act, the Company remeasured the Tax Receivable Agreement  liability,  payable to
Holdings, resulting in the recognition of a $93  million gain which is reported  in other income in the
consolidated statements of comprehensive  income.

The cumulative amounts of deferred tax assets, payables to Holdings and additional paid-in capital
arising from stock offerings from the date of the IPO through December 31, 2017 were  $483 million,
$410 million, and $73 million, respectively. Amounts payable under the Tax Receivable Agreement are
payable to Holdings annually following the filing  of IBG,  Inc.’s federal  income tax  return. The
Company has paid Holdings a cumulative  total  of $131 million  through December  31, 2017 pursuant  to
the terms of the Tax Receivable Agreement.

The Exchange Agreement, as amended,  provides  for future redemptions of member interests and for
the purchase of member interests in IBG  LLC by  IBG,  Inc. from Holdings, which  could  result in
IBG, Inc. acquiring the remaining member interests in IBG LLC  that it does not own. On an annual
basis, members of Holdings are able to request redemption of  their  interests.

104

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

4. Equity and Earnings per Share (Continued)

At the  time of IBG, Inc.’s IPO in 2007,  three hundred sixty (360)  million shares of authorized  common
stock were reserved for future sales and redemptions. From 2008 through  2010, Holdings redeemed
5,013,259 IBG LLC interests with a total  value of $114 million, which redemptions  were funded using
cash on hand at IBG LLC. Upon cash redemption these IBG LLC interests were retired. From  2011
through  2016, IBG, Inc. issued 12,643,495 shares of common stock (with a  fair value  of $362 million)
directly to Holdings in exchange for  an equivalent number of member interests in  IBG LLC. On
July 28, 2017, the Company filed a Supplemental Prospectus on Form 424B5 (File
Number 333- 219552) with the SEC to issue 1,214,860 shares  of  common  stock (with a fair  value of
$49 million) in exchange for an equivalent  number of shares of member interests  in IBG  LLC.

As a  consequence of these redemption  transactions, and distribution  of  shares to employees (see
Note 9), IBG, Inc.’s interest in IBG LLC has  increased to approximately  17.4%,  with Holdings  owning
the remaining 82.6% as of December 31, 2017. The redemptions also resulted in an increase in the
Holdings interest held by Mr. Thomas Peterffy  and his affiliates from approximately  84.6% at  the IPO
to approximately 89.2% as of December  31, 2017.

Earnings per Share

Basic earnings per share is calculated  utilizing net  income available for common stockholders divided
by the weighted average number of shares  of  Class  A  and Class B common stock  outstanding for that
period.

Year-Ended December 31,

2017

2016

2015

(in millions, except share or per share amounts)

Basic earnings per share

Net income available for common stockholders . . . . . . . . .

$

76

$

84

$

49

Weighted average shares of common stock outstanding

Class A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

69,926,833
100

66,013,147
100

61,042,971
100

69,926,933

66,013,247

61,043,071

Basic earnings per share . . . . . . . . . . . . . . . . . . . . . . . . .

$

1.09

$

1.28

$

0.80

105

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

4. Equity and Earnings per Share (Continued)

Diluted earnings per share are calculated utilizing  the Company’s basic net income available for
common stockholders divided by diluted weighted average shares outstanding with no adjustments to
net income available to common stockholders for potentially  dilutive common  shares.

Year-Ended December 31,

2017

2016

2015

(in millions, except share or per share amounts)

Diluted earnings per share

Net income available for common stockholders . . . . . . . . .

$

76

$

84

$

49

Weighted average shares of common stock outstanding

Class A

Issued and outstanding . . . . . . . . . . . . . . . . . . . . . . .
Potentially dilutive common shares

69,926,833

66,013,147

61,042,971

Issuable pursuant to employee stock incentive plans
Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

977,988
100

1,286,166
100

1,466,725
100

70,904,921

67,299,413

62,509,796

Diluted earnings per share . . . . . . . . . . . . . . . . . . . . . . . .

$

1.07

$

1.25

$

0.78

Member Distributions and Stockholder Dividends

During  the three years ended December 31, 2017, 2016,  and  2015, IBG  LLC made distributions
totaling $328 million, $267 million, and  $267 million, to its members, of which IBG,  Inc.’s proportionate
share was $56 million, $43 million, and $40 million, respectively. The  Company paid quarterly cash
dividends of $0.10 per share of common  stock, totaling  $28 million, $26 million, and $25 million during
2017, 2016, and 2015, respectively.

On January 16, 2018, the Company declared a cash dividend  of $0.10 per common  share, payable on
March 14, 2018 to stockholders of record as of March 1, 2018.

5. Comprehensive Income

The following table presents comprehensive  income and earnings per share on comprehensive income:

Year-Ended December 31,

2017

2016

2015

Comprehensive income available for common  stockholders . .

Earnings per share on comprehensive income

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Weighted average common shares outstanding

(in millions, except share or per share amounts)
39
$

80

87

$

$

$

$

1.24

1.22

$

$

1.21

1.19

$

$

0.64

0.62

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

69,926,933

66,013,247

61,043,071

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

70,904,921

67,299,413

62,509,796

106

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities

Financial Assets and Liabilities Measured  at  Fair Value  on a Recurring Basis

The following tables set forth, by level within the fair value hierarchy (see  Note 2), financial assets  and
liabilities, measured at fair value on a recurring  basis as of December 31,  2017 and  December 31, 2016.
As required by ASC Topic 820, financial  assets and financial liabilities  are classified in their entirety
based on  the lowest level of input that is significant to the respective fair value measurement.

Financial Assets At Fair Value as of
December 31, 2017

Level 1

Level 2

Level 3

Total

Securities segregated for regulatory purposes . . . . . . . . . . . . . . . . . .

$4,519

(in millions)
$—

$— $4,519

Financial instruments owned, at fair value

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warrants and discount certificates . . . . . . . . . . . . . . . . . . . . . . . .
U.S. and foreign government securities . . . . . . . . . . . . . . . . . . . .
Corporate and municipal bonds . . . . . . . . . . . . . . . . . . . . . . . . . .
Currency forward contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total financial instruments owned, at fair value . . . . . . . . . . . . . . . .

2,000
1,052
5
60
—
—

3,117

—
—
—
—
1
32

33

1
—
—
—
3
—

4

2,001
1,052
5
60
4
32

3,154

Total financial assets at fair value . . . . . . . . . . . . . . . . . . . . . . . . . .

$7,636

$33

$ 4

$7,673

Financial Liabilities At Fair Value as
of December 31, 2017

Level 1

Level 2

Level 3

Total

(in millions)

Financial instruments sold, but not yet purchased, at fair value

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Currency forward contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total financial instruments sold, but not yet  purchased, at  fair value . . .

$302
464
—

766

Total financial liabilities at fair value . . . . . . . . . . . . . . . . . . . . . . . . .

$766

$—
—
1

1

$ 1

$— $302
464
1

—
—

—

767

$— $767

107

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

Financial Assets At Fair Value as of
December 31, 2016

Level 1

Level 2

Level 3

Total

Securities segregated for regulatory purposes . . . . . . . . . . . . . . . .

$ 7,398

(in millions)
$—

$— $ 7,398

Financial instruments owned, at fair value

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warrants and discount certificates . . . . . . . . . . . . . . . . . . . . . .
U.S. and foreign government securities . . . . . . . . . . . . . . . . . . .
Corporate and municipal bonds . . . . . . . . . . . . . . . . . . . . . . . .
Currency forward contracts . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total financial instruments owned, at fair value . . . . . . . . . . . . . .

1,821
1,804
43
363
—
—

4,031

—
—
—
—
2
3

5

—
—
—
—
1
—

1

1,821
1,804
43
363
3
3

4,037

Total financial assets at fair value . . . . . . . . . . . . . . . . . . . . . . . .

$11,429

$ 5

$ 1

$11,435

Financial Liabilities At Fair Value as of
December 31, 2016

Level 1

Level 2

Level 3

Total

(in millions)

Financial instruments sold, but not yet purchased, at fair value

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warrants and discount certificates . . . . . . . . . . . . . . . . . . . . . . . .
Currency forward contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 839
1,286
1
—

Total financial instruments sold, but not yet purchased,  at fair value .

2,126

Total financial liabilities at fair value . . . . . . . . . . . . . . . . . . . . . . . .

$2,126

$—
—
—
19

19

$19

$— $ 839
1,286
1
19

—
—
—

—

2,145

$— $2,145

Transfers between Level 1 and Level 2

Transfers of financial assets and financial liabilities  at fair  value to or from Levels 1  and 2  arise where
the market for a specific financial instrument has become active or inactive during the period. The fair
values transferred are ascribed as if the financial assets or  financial  liabilities had been transferred as of
the end of the period. During the years  ended December 31, 2017 and  2016, there were no  transfers
between levels for financial assets and liabilities,  at fair value.

Level 3 Financial Assets and Financial  Liabilities

The Company’s Level 3 financial assets  are comprised of delisted  and  illiquid  securities reported within
financial instruments owned, at fair value  in the consolidated statements of  financial condition.  During
the year ended December 31, 2017 financial assets included $1 million of Level 3 securities which  were
transferred from Level 1 as certain stocks were  no longer tradable in  active  markets  and were valued
by the Company based on internal estimates.  In  addition,  the Company purchased  a $2 million
convertible bond in a private placement, which is classified as Level 3. During  the year  ended
December 31, 2016 financial assets included $1  million  of  Level 3  securities which  were transferred
from Level 2 as a result of a security becoming  illiquid.

108

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

Trading Gains from Market Making Transactions

Trading gains and losses from market  making  transactions reported  in the statements of comprehensive
income, by major product type, are comprised  of:

Year-Ended
December 31,

2017

2016

2015

Equities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
$42
Fixed income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —
(2)
Foreign exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(in millions)
$155
—
8

$254
1
14

Total trading gains, net

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$40

$163

$269

These transactions are related to the  Company’s  financial instruments owned and  financial  instruments
sold, but not yet purchased, at fair value  and include  both  derivative and  non-derivative financial
instruments, including exchange traded options and futures. These gains  and  losses also  include market
making related dividend and fixed income  trading related  interest  income  and expense.

The gains (losses) in the table above are not representative of the integrated trading strategies  applied
by the Company, which utilizes financial  instruments across  various  product types. Gains  and losses in
one product type frequently offset gains and losses  in other product  types.

109

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

Financial Assets and Liabilities Not Measured at Fair Value

The following tables represent the carrying value, fair value, and fair  value hierarchy category of certain
financial assets and liabilities that are  not recorded at  fair value in the  Company’s consolidated
statements of financial condition. The following table  excludes  certain  financial  instruments such as
equity investments and all non-financial  assets and liabilities:

Financial assets, not measured at fair value

Cash and cash equivalents . . . . . . . . . . . . . . . . . . . .
Cash and securities segregated for regulatory

purposes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities borrowed . . . . . . . . . . . . . . . . . . . . . . . . .
. . . .
Securities purchased under agreements  to resell
Receivables from customer
. . . . . . . . . . . . . . . . . . .
Receivables from broker, dealers, and  clearing

organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest receivable . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31, 2017

Carrying
Value

Fair
Value

Level 1

Level  2

Level 3

(in millions)

$ 1,732

$ 1,732

$1,732

$ — $—

15,713
2,957
2,035
29,821

15,713
2,957
2,035
29,821

6,547
9,166
—
2,957
2,035
—
— 29,821

823
116
6

823
116
6

—
—
—

823
116
6

—
—
—
—

—
—
—

Total financial assets, not measured at fair value . . . . . .

$53,203

$53,203

$8,279

$44,924

$—

Financial liabilities, not measured at  fair value

Short-term borrowings . . . . . . . . . . . . . . . . . . . . . . .
Securities loaned . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities sold under agreements to repurchase . . . . .
Payables to customer . . . . . . . . . . . . . . . . . . . . . . . .
Payables to brokers, dealers and clearing

organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest payable . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

15
4,444
1,316
47,548

$

15
4,444
1,316
47,548

15
$ — $
4,444
—
—
1,316
— 47,548

283
22

283
22

—
—

283
22

$—
—
—
—

—
—

Total financial liabilities, not measured  at fair  value . . .

$53,628

$53,628

$ — $53,628

$—

110

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

Financial assets, not measured at fair value

Cash and cash equivalents . . . . . . . . . . . . . . . . . . . .
Cash and securities segregated for regulatory

purposes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities borrowed . . . . . . . . . . . . . . . . . . . . . . . . .
Securities purchased under agreements  to resell
. . . .
. . . . . . . . . . . . . . . . . . .
Receivables from customer
Receivables from broker, dealers, and  clearing

organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest receivable . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31, 2016

Carrying
Value

Fair
Value

Level 1

Level  2

Level 3

(in millions)

$ 1,925

$ 1,925

$1,925

$ — $—

16,619
3,629
111
19,409

1,040
57
28

16,619
3,629
111
19,409

1,040
57
32

10,995
5,624
3,629
—
—
111
— 19,409

—
—
—

1,040
57
32

—
—
—

—
—
—

Total financial assets, not measured at fair value . . . . . .

$42,818

$42,822

$7,549

$35,273

$—

Financial liabilities, not measured at  fair value

Short-term borrowings . . . . . . . . . . . . . . . . . . . . . . .
Securities loaned . . . . . . . . . . . . . . . . . . . . . . . . . . .
Payables to customer . . . . . . . . . . . . . . . . . . . . . . . .
Payables to brokers, dealers and clearing

organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest payable . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

74
4,293
41,731

$

74
4,293
41,731

74
$ — $
4,293
—
— 41,731

239
6

239
6

—
—

239
6

$—
—
—

—
—

Total financial liabilities, not measured  at fair  value . . .

$46,343

$46,343

$ — $46,343

$—

Netting of Financial Assets and Financial Liabilities

It  is the Company’s policy to net securities borrowed and  securities loaned, and  securities purchased
under agreements to resell and securities sold under  agreements to repurchase that meet the  offsetting
requirements prescribed in ASC Topic  210-20. In the  tables below, the amounts of financial instruments
that are not offset in the consolidated statements of financial condition, but  could  be  netted against
cash or financial instruments with specific  counterparties under  master netting  agreements, according to
the terms of the agreements, including clearing  houses  (exchange traded options, warrants and discount
certificates) or over the counter currency forward contract counterparties, are presented to provide
financial statement readers with the Company’s net payable or  receivable with counterparties for these
financial instruments.

111

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

The following tables set forth the netting  of financial  assets  and of financial liabilities  as of
December 31, 2017 and December 31, 2016:

December 31, 2017

Gross Amounts
of Financial
Assets and
Liabilities
Recognized

Amounts
Offset in the
Consolidated
Statement of

Net Amounts
Presented  in
the Consolidated
Statement of

Financial Condition(2) Financial  Condition

(in millions)

Amounts Not
Offset
in the
Consolidated
Statement of
Financial
Condition

Cash or Financial
Instruments

Net Amount

Offsetting of Financial

Assets
Securities segregated

for regulatory
purposes—purchased
under agreements to
resell . . . . . . . . . . .
Securities borrowed . .
Securities purchased

under agreements to
resell . . . . . . . . . . .

Financial Instruments
owned, at fair value
Options . . . . . . . . .
Warrants and
discount
certificates . . . . .

Currency forward

contracts . . . . . . .

$ 9,166(1)
2,957

2,035

1,052

5

32

Total . . . . . . . . . . . . . .

$15,247

Offsetting of Financial

Liabilities
Securities loaned . . . .
Securities sold under
agreements to
repurchase . . . . . . .

Financial instruments
sold, but not yet
purchased, at fair
value
Options . . . . . . . . .
Warrants and
discount
certificates . . . . .

Currency forward

contracts . . . . . . .

$ 4,444

1,316

464

—

1

Total . . . . . . . . . . . . . .

$ 6,225

$ 9,166
2,957

$ (9,166)
(2,822)

$ —
135

2,035

1,052

5

32

(2,035)

(451)

—

—

—

601

5

32

$15,247

$(14,474)

$773

$ 4,444

$ (4,201)

$243

1,316

(1,316)

464

—

1

(451)

—

—

—

13

—

1

$ 6,225

$ (5,968)

$257

$—
—

—

—

—

—

$—

$—

—

—

—

—

$—

112

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

December 31, 2016

Gross Amounts
of Financial
Assets and
Liabilities
Recognized

Amounts
Offset in the
Consolidated
Statement of
Financial
Condition(2)

Net Amounts
Presented  in
the Consolidated
Statement of
Financial Condition

(in millions)

Amounts Not
Offset
in the
Consolidated
Statement of
Financial
Condition

Cash or  Financial
Instruments

Net Amount

Offsetting of Financial

Assets
Securities segregated for

regulatory
purposes—purchased
under agreements to
resell . . . . . . . . . . . .
Securities borrowed . . .
Securities purchased

under agreements to
resell . . . . . . . . . . . .

Financial Instruments
owned, at fair value
Options . . . . . . . . . .
Warrants and discount
. . . . . .

certificates

Currency forward

contracts . . . . . . . .

$10,995(1)
3,629

111

1,804

43

3

Total

. . . . . . . . . . . . . . .

$16,585

Offsetting of Financial

Liabilities
Securities loaned . . . . .
Financial instruments
sold, but not yet
purchased, at fair
value
Options . . . . . . . . . .
Warrants and discount
. . . . . .

certificates

Currency forward

contracts . . . . . . . .

$ 4,293

1,286

1

19

Total

. . . . . . . . . . . . . . .

$ 5,599

$—
—

—

—

—

—

$—

$—

—

—

—

$—

$10,995
3,629

$(10,995)
(3,488)

$ —
141

111

(111)

1,804

(1,230)

43

3

(1)

—

—

574

42

3

$16,585

$(15,825)

$760

$ 4,293

$ (4,158)

$135

1,286

(1,230)

1

19

(1)

—

56

—

19

$ 5,599

$ (5,389)

$210

(1) As of December 31, 2017 and December  31, 2016,  the  Company had  $9.2  billion and $11.0  billion,

respectively, of securities purchased under agreements to resell that were  segregated  to  satisfy  regulatory
requirements. These securities are included  in ‘‘Cash  and  securities—segregated  for regulatory  purposes’’  in
the consolidated statements of financial condition.

(2) The Company did not have any balances  eligible  for netting  in  accordance with  ASC Topic  210-20 at

December 31, 2017  and 2016.

113

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

Secured Financing  Transactions—Maturities and Collateral Pledged

The following tables present gross obligations for securities loaned transactions by remaining
contractual maturity and class of collateral pledged as  of December  31, 2017 and December 31, 2016:

December 31, 2017

Remaining Contractual Maturity

Overnight
and Open

Less than
30 days

30 - 90 Over 90

days

days

Total

(in millions)

Securities loaned

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate bonds . . . . . . . . . . . . . . . . . . . . . . . . . . .

$4,389
55

Total securities loaned . . . . . . . . . . . . . . . . . . . . . . . . .

4,444

Securities sold under agreements to repurchase

U.S. government securities . . . . . . . . . . . . . . . . . . . .

1,316

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$5,760

$—
—

—

—

$—

$—
—

—

—

$—

$— $4,389
55

—

—

—

4,444

1,316

$— $5,760

December 31, 2016

Remaining Contractual Maturity

Overnight
and Open

Less than
30 days

30 - 90 Over 90

days

days

Total

(in millions)

Securities Loaned

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate bonds . . . . . . . . . . . . . . . . . . . . . . . . . . .

$4,269
24

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$4,293

$—
—

$—

$—
—

$—

$— $4,269
24

—

$— $4,293

7. Collateralized Transactions

The Company enters into securities borrowing  and  lending transactions and agreements to repurchase
and resell securities to finance trading inventory,  to  obtain securities  for settlement  and to earn residual
interest rate spreads. In addition, the Company’s customers pledge their securities owned to
collateralize margin loans. Under these transactions, the Company either  receives  or provides collateral,
including equity, corporate debt and  U.S.  government securities. Under typical agreements, the
Company is permitted to sell or repledge securities  received as collateral  and  use these securities  to
secure securities purchased under agreements  to  resell, enter into securities lending transactions or
deliver these securities to counterparties  to cover short  positions.

The Company also engages in securities financing transactions  with and for customers through margin
lending. Customer receivables generated from  margin lending activity  are collateralized by customer-
owned securities held by the Company. Customers’ required margin  levels and established credit limits
are monitored continuously by risk management staff using automated systems. Pursuant to the
Company’s policy and as enforced by  such systems,  customers are required  to  deposit additional
collateral or reduce positions, when necessary to avoid  automatic liquidation of their positions.

114

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

7. Collateralized Transactions (Continued)

Margin loans are extended to customers on a demand basis and are not committed  facilities.  Factors
considered in the acceptance or rejection of margin  loans are the  amount  of  the loan, the  degree  of
leverage being employed in the customer  account and an  overall evaluation of the  customer’s portfolio
to ensure proper diversification or, in the case of  concentrated positions,  appropriate  liquidity of the
underlying collateral. Additionally, transactions relating to concentrated or restricted positions are
limited or prohibited by raising the level of required  margin  collateral (to 100% in the extreme case).
Underlying collateral for margin loans is  evaluated with  respect to the liquidity  of  the collateral
positions, valuation of securities, volatility analysis and an  evaluation  of  industry concentrations.
Adherence to the Company’s collateral policies significantly limits the  Company’s credit exposure  to
margin loans in the event of a customer’s  default.  Under margin lending agreements,  the Company may
request additional  margin collateral from customers  and  may  sell  securities that have not been  paid for
or purchase securities sold but not delivered  from customers, if necessary. As  of December  31, 2017
and  December 31, 2016, approximately  $29.8 billion and $19.4 billion, respectively, of customer margin
loans were outstanding.

The following table summarizes the amounts related to collateralized transactions as of December 31,
2017 and December 31, 2016:

Securities lending transactions . . . . . . . . . . . . . . . . . . . .
Securities purchased under agreements  to  resell

December 31, 2017

December 31, 2016

Permitted
to Repledge

Sold or
Repledged

Permitted
to Repledge

Sold or
Repledged

(in millions)

$23,662

$ 3,041

$13,768

$ 3,621

transactions(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer margin assets . . . . . . . . . . . . . . . . . . . . . . . . .

11,231
30,236

11,231
9,013

11,117
17,773

11,117
7,172

$65,129

$23,285

$42,658

$21,910

(1) As of December 31, 2017, $9.2 billion or 82% (as of December 31,  2016, $11.0 billion  or 99%) of
securities acquired through agreements to resell  that  are shown as repledged have been deposited
in a separate bank account for the exclusive benefit of customers in  accordance with SEC
Rule 15c3-3.

In the normal course of business, the  Company pledges qualified  securities with  clearing organizations
to satisfy daily margin and clearing fund  requirements. As of December 31, 2017  and December 31,
2016, the majority of the Company’s U.S.  and foreign  government securities owned were pledged to
clearing organizations.

115

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

7. Collateralized Transactions (Continued)

Financial instruments owned and pledged  as collateral, including  amounts pledged  to  affiliates,  where
the counterparty has the right to repledge,  as of December  31, 2017 and December 31,  2016 are
presented in the following table:

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U.S. and foreign government securities . . . . . . . . . . . . . .

December 31,
2017

December 31,
2016

(in millions)

$1,150
54

$1,204

$1,574
359

$1,933

8. Other Income

The components of other income for the  years  ended December 31, 2017,  2016, and  2015 were:

Market data fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Account activity fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk exposure fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Payments for order flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gains (losses) on financial instruments,  at  fair value and other investments,  net
.
. . . . . . . . . . . . . . . . . .
Gains (losses) from currency diversification strategy, net
Other, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year-Ended
December 31,

2017

2016

2015

(in millions)
$ 35
18
19
14
35
(40)
13

$ 30
16
21
17
(18)
(206)
18

$ 39
20
24
15
1
110
123

$332

$ 94

$(122)

Market data fees are charged to customers for market data services  they  subscribe  to  and are  largely
offset by the related costs paid to obtain  market  data  from  third party  vendors.  Account activity fees
are charged to customers that do not  generate the minimum monthly  commission. The fee is the
difference between the minimum required  commission  and  the actual  commissions generated.  Risk
exposure fees are earned from a small minority of customer accounts carrying positions with market
risk that exceeds defined thresholds.  Payments for order flow are  earned  from various  options
exchanges based upon options trading volume  originated by the Operating Companies. Gains (losses)
on financial instruments, at fair value  and  other  investments,  net  include  (1) realized and unrealized
gains and losses on financial instruments  that (a) are held for  purposes other than the Company’s
market making activities, (b) are subject to restrictions, or (c)  are accounted for under the equity
method and (2) dividends on investments  accounted for under cost method. Other, net includes  a gain
on the sale of the Company’s U.S. market  making operations to Two Sigma Securities, LLC of
$11 million, reflecting the recovery of exit costs, and a $93 million gain  from the remeasurement of the
Tax  Receivable Agreement liability as a  result  of the Tax Act (see Note 4 and Note  10).

116

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

9. Employee Incentive Plans

Defined Contribution Plan

The Company offers substantially all employees of U.S.-based Operating  Companies who  have met
minimum service requirements the opportunity to participate in defined contribution retirement plans
qualifying under the provisions of Section  401(k) of the Internal  Revenue Code. The general purpose
of this  plan is to provide employees with  an incentive to make regular  savings in order to provide
additional financial security during retirement. This plan provides for the Company to match 50%  of
the employees’ pre-tax contribution, up to a  maximum of 10%  of eligible earnings.  The  employee is
vested in the matching contribution incrementally  over six years of service. Included in employee
compensation and benefits expenses  in the consolidated  statements of comprehensive income were
$3 million of plan  contributions for each of  the three years ended  December 31,  2017, 2016, and 2015,
respectively.

2007 ROI Unit Stock Plan

In connection with the IPO, the Company  adopted the IBG,  Inc.  2007 ROI Unit  Stock Plan (‘‘ROI
Unit Stock Plan’’). An aggregate of 1,271,009 shares of restricted common stock (consisting of
1,250,000 shares issued under the ROI Unit Stock Plan and 21,009 shares under the  2007 Stock
Incentive Plan, as described below), with  a  fair value at the date of grant  of $38 million were issued to
IBG LLC and held as treasury stock.

As of December 31, 2017, the Company has 3,849 shares of common stock  remaining to be distributed
to former employees under the ROI Unit  Stock  Plan.

2007 Stock Incentive Plan

In 2017, the Company amended the 2007 Stock Incentive Plan  (the  ‘‘Stock Incentive Plan’’)  to  extend
its term for a ten-year period through April 24,  2027, pending  stockholders’  approval at  the Company’s
2018 Annual Meeting. Under the Company’s Stock Incentive Plan, up  to  30  million  shares of the
Company’s common stock may be issued to satisfy vested restricted stock units  granted to directors,
officers, employees, contractors and consultants of the Company. The purpose of the Stock Incentive
Plan is to promote the Company’s long-term financial success by attracting,  retaining and rewarding
eligible participants.

As a  result of the Company’s organizational structure, a description of which  can be found in
‘‘Business—Our Organizational Structure’’  in Part I Item 1 of this  Annual Report on  Form 10-K,  there
is no dilutive effect upon ownership  of common stockholders of issuing shares under  the Stock
Incentive Plan. The issuances do not  dilute the  book value of the  ownership of common stockholders
since the restricted stock units are granted at market value,  and upon their vesting and  the related
issuance of shares of common stock, the ownership of IBG, Inc. in IBG LLC, increases proportionately
to the shares issued. As a result of such proportionate increase  in share ownership, the dilution upon
issuance of common stock is borne by  IBG  LLC’s majority member (i.e.,  noncontrolling interest),
Holdings, and not by IBG, Inc. or its common  stockholders. Additionally, dilution of  earnings that may
take place after issuance of common stock is reflected in EPS  reported in the Company’s financial
statements. The EPS dilution can be neither estimated nor projected,  but historically  it has not been
material.

117

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

9. Employee Incentive Plans (Continued)

The Stock Incentive Plan is administered by the Compensation Committee of the Company’s Board of
Directors. The Compensation Committee has discretionary authority to determine the eligibility to
participate in the Stock Incentive Plan and establishes the terms  and conditions of the awards,
including the number of awards granted to each participant and all other terms and  conditions
applicable to such awards in individual grant  agreements. Awards are  expected to be made primarily
through  grants of restricted stock units.  Stock  Incentive Plan awards  are subject to issuance over  time.
All previously granted but not yet earned awards may be cancelled  by the  Company upon the
participant’s termination of employment  or  violation  of certain applicable covenants prior to issuance,
unless determined otherwise by the Compensation Committee.

The Stock Incentive Plan provides that,  upon  a  change in  control,  the Compensation Committee may,
at its discretion, fully vest any granted  but  not yet earned awards under  the Stock Incentive  Plan, or
provide that any such granted but not yet earned awards  will be honored or assumed, or new  rights
substituted by the new employer on a substantially  similar basis and  on  terms and conditions
substantially comparable to those of the  Stock  Incentive Plan.

The Company expects to continue to grant awards on or about December  31 of each year to eligible
participants as part of an overall plan of equity compensation. Restricted stock units vest and  become
distributable to participants in accordance with the  following  schedule:

(cid:127) 10% on the first vesting date, which  is on or about May 9 of  each year; and

(cid:127) an additional 15% on each of the following six anniversaries of  the  first vesting,  assuming
continued employment with the Company and compliance with  non-competition and  other
applicable covenants.

Awards granted to external directors  vest, and are distributed,  over a  five-year period  (20%  per  year)
commencing one year after the date of grant. A total of 24,263  restricted stock units  have been granted
to the external directors cumulatively  since the plan’s inception.

Stock Incentive Plan awards granted (excluding 21,009  shares  issued pursuant to the ROI Unit Stock
Plan described above) and the related fair values since the plan’s  inception are  presented  in the table
below:

Prior periods (since inception) . . . . . . . . . . . . . . . . . . . . .
December 31, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
December 31, 2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fair Value at
Date of Grant
($ millions)

Units

20,888,468
1,211,533
1,451,136(1)
923,407(2)

24,474,544

$397
52
55
55

$559

(1) Stock Incentive Plan number of granted restricted  stock units related to 2016 was

adjusted by 5,657 additional restricted  stock  units during the  year ended December  31,
2017.

(2) Granted under the Company’s amended  2007 Stock Incentive Plan,  pending stockholder

approval at the Company’s 2018 Annual Meeting.

118

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

9. Employee Incentive Plans (Continued)

Estimated future grants under the Stock Incentive  Plan are accrued for ratably during each  year (see
Note 2). In accordance with the vesting schedule, outstanding  awards vest and  are distributed to
participants yearly on or about May 9 of each  year. At  the end of each year, there are  no vested
awards that remain undistributed.

Compensation expense related to the Stock Incentive  Plan recognized in the consolidated statements  of
comprehensive income was $53 million, $51  million, and $50 million for the years ended  December 31,
2017, 2016, and 2015, respectively. Estimated future  compensation  costs for unvested awards, net  of
credits for cancelled awards, as of December 31, 2017 are $38  million.

The following summarizes the Stock Incentive  Plan and ROI Unit Stock Plan activities from
December 31, 2014 through December 31, 2017:

Stock
Incentive Plan
Units

Intrinsic Value
of SIP Units
which Vested
and were Distributed
($ millions)(1)

ROI Unit
Stock Plan
Shares

Balance, December 31, 2014 . . . . . . . . .

10,376,800

Granted . . . . . . . . . . . . . . . . . . . . . . .
Cancelled . . . . . . . . . . . . . . . . . . . . . .
Distributed . . . . . . . . . . . . . . . . . . . . .

1,211,533
(163,221)
(2,487,127)

Balance, December 31, 2015 . . . . . . . . .

8,937,985

Granted . . . . . . . . . . . . . . . . . . . . . . .
Cancelled . . . . . . . . . . . . . . . . . . . . . .
Distributed . . . . . . . . . . . . . . . . . . . . .

1,451,136(2)
(69,340)
(2,402,062)

Balance, December 31, 2016 . . . . . . . . .

7,917,719

Granted . . . . . . . . . . . . . . . . . . . . . . .
Cancelled . . . . . . . . . . . . . . . . . . . . . .
Distributed . . . . . . . . . . . . . . . . . . . . .

923,407(3)
(115,711)
(2,274,777)

Balance, December 31, 2017 . . . . . . . . .

6,450,638

$86

$88

$81

9,614

—
—
(3,244)

6,370

—
—
(1,376)

4,994

—
—
(1,145)

3,849

(1) Intrinsic value of SIP units distributed represents the  compensation  value reported  to  the

participants.

(2) Stock Incentive Plan number of granted restricted  stock units related to 2016 was

adjusted by 5,657 additional restricted  stock  units during the  year ended December  31,
2017.

(3) Granted under the Company’s amended  2007 Stock Incentive Plan,  pending stockholder

approval at the Company’s 2018 Annual Meeting.

Awards previously granted but not yet earned under the stock plans  are  subject  to  the plans’
post-employment provisions in the event  a  participant ceases employment with the  Company. Through
December 31, 2017, a total of 573,197  restricted  stock  units have  been distributed under  these
post-employment provisions. These distributions are  included in the table above.

119

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

10. Income Taxes

Income tax expense for the three years  ended December 31, 2017, 2016, and 2015  differs  from the U.S.
federal statutory rate primarily due to the taxation  treatment of income attributable to noncontrolling
interests in IBG LLC and the enactment of the Tax  Act, as  discussed below.  These noncontrolling
interests are subject to U.S. taxation as partnerships. Accordingly, the income attributable  to  these
noncontrolling interests is reported in the consolidated statements of  comprehensive income, but the
related U.S. income tax expense attributable to these noncontrolling interests is not reported  by  the
Company as it is the obligation of the individual members. Income tax expense is  also affected  by  the
differing effective tax rates in foreign, state  and  local  jurisdictions  where certain of the Company’s
subsidiaries are subject to corporate taxation.

Deferred income taxes arise primarily due to the  amortization of the deferred  tax assets recognized  in
connection with the common stock offerings (see Note 4), differences in the  valuation of  financial
assets and liabilities, and for other temporary differences  arising  from  the deductibility of compensation
and  depreciation expenses in different time  periods for accounting and income tax  return  purposes.

The Tax Act, as previously described, makes broad and complex changes to  the U.S.  tax code,
including, but not limited to, (1) reducing  the U.S. federal corporate  tax rate to 21%, effective
January 1, 2018; (2) requiring a one-time transition tax on certain undistributed earnings of foreign
subsidiaries to be paid over eight years; (3)  generally eliminating U.S. federal income taxes on
dividends from foreign subsidiaries; (4) requiring  a  current inclusion in U.S. federal  taxable income of
certain earnings of controlled foreign corporations;  (5) eliminating  the corporate  alternative minimum
tax (‘‘AMT’’) and changing how existing AMT credits  can be realized; (6) creating the base erosion
anti-abuse tax, a new minimum tax; (7)  creating a new limitation  on deductible interest  expense;
(8) changing rules related to uses and limitations  of  net operating loss  carryforwards created in tax
years beginning after December 31, 2017; (9) repealing  the Section 199 manufacturing deduction; and
(10) full expensing of qualified property for tax return  purposes.

The SEC staff issued Staff Accounting Bulletin 118 (‘‘SAB 118’’), which provides guidance on
accounting for the  tax effects of the Tax Act.  SAB 118 provides a  measurement period  that  should not
extend beyond one year from the enactment of  the Tax Act for entities  to complete  the accounting
under ASC Topic 740. In accordance with SAB  118, an  entity must reflect the income tax effects of
those aspects of the Tax Act for which the  accounting under  ASC Topic  740 is complete.  To the extent
that an entity’s accounting for certain income tax effects of the Tax Act  is incomplete  but it is able to
determine a reasonable estimate, the entity must record a provisional  estimate on its financial
statements. However, if an entity cannot determine a provisional estimate  to  be  included on its
financial statements, the entity should continue to apply ASC Topic  740 on  the basis of  the provisions
of the tax laws that were in effect immediately before the  enactment of the  Tax Act.

The Company’s accounting for the following elements of the Tax Act is incomplete. However,  the
Company has made reasonable estimates  of  certain effects and, therefore, recorded provisional
adjustments as follows:

Reduction of U.S. federal corporate tax  rate: The Tax Act reduces the corporate tax  rate to 21%,
effective January 1, 2018. For certain  of the Company’s  deferred  tax assets  and liabilities,  the Company
has recognized a provisional net decrease  of $115 million  with a corresponding adjustment to deferred
income tax expense (or deferred tax benefit)  for the  year ended December  31, 2017. While the
Company has made a reasonable estimate  of the  impact of the reduction  in corporate rate,  it may  be

120

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

10. Income Taxes (Continued)

affected by other analyses related to the Tax  Act, including,  but not limited to, the calculation of
deemed repatriation of deferred foreign  income and the  state tax effect  of  adjustments made  to  federal
temporary differences. The Company is still analyzing  certain aspects  of the Tax Act and refining its
calculations, which could potentially affect the measurement of these balances or  potentially give rise to
new deferred tax amounts. In connection with the remeasurement of its deferred  tax asset  arising  from
the acquisition of interests in IBG LLC,  the Company also  remeasured the related Tax  Receivable
Agreement liability, payable to Holdings, resulting in the recognition of a $93 million  gain which is
reported in other income in the consolidated statements of comprehensive income (see Note 4).

Deemed Repatriation Transition Tax: The Deemed Repatriation Transition Tax (‘‘Transition Tax’’) is a
tax on previously untaxed accumulated  and current  earnings of certain  foreign subsidiaries. To
determine the amount of the Transition Tax, the Company must determine, in addition to other factors,
the amount of post-1986 earnings of the  relevant foreign subsidiaries, as well as the amount of
non-U.S.  income taxes paid on such earnings.  The Company  has made a reasonable estimate  of the
Transition Tax and recorded a provisional  Transition Tax  obligation of  $62 million. This amount may
change when the calculation of post-1986 foreign earnings and profits previously  deferred from U.S.
federal taxation and the amounts held  in  cash or other specified assets are finalized. The Company
does not expect any significant changes, but it  is continuing to gather additional information to more
precisely compute the amount of the Transition Tax.

The Tax Act creates a new requirement that  global intangible low taxes  income (‘‘GILTI’’) earned  by
controlled foreign corporations (‘‘CFC’’s)  must be included  currently in the gross income of the CFC’s
U.S. shareholder. GILTI is the excess  of the shareholder’s ‘‘net CFC-tested income’’ over the deemed
tangible income return, which is currently  defined as the  excess  of (1) 10 percent of the aggregate  of
the U.S  shareholder’s pro rata share of the qualified business asset investment in each CFC with
respect to which it is a U.S shareholder  over (2) the amount of certain interest expense taken into
account in the determination of net CFC-tested income.

Because of the complexity of the new GILTI tax rules, the Company is continuing to evaluate this
provision  of the Tax Act and the application of ASC Topic 740. Under  U.S. GAAP, the Company is
allowed to make an accounting policy  election of either  (1) treating taxes due on future U.S. inclusions
in taxable income related to GILTI as  a  current-period expense when incurred (the ‘‘period cost
method’’) or (2) factoring such amounts  into the Company’s measurement of its deferred taxes (the
‘‘deferred method’’). The Company selected the deferred  method.  The  Company’s calculation of the
deferred balance with respect to the new  GILTI tax rules will depend, in part, on analyzing its global
income to determine whether it expects to have future U.S. inclusions in taxable income related to
GILTI and, if so, what the impact is  expected  to  be.  Because whether the Company expects to have
future U.S. inclusions in taxable income related  to  GILTI depends on, not only its  current structure
and estimated future results of global operations, but  its  intent and ability to modify its structure and/or
its  business, the Company is not yet able  to  reasonably estimate the effect  of this  provision of the  Tax
Act. Therefore, the Company has not  made any adjustments related to potential GILTI  tax in its
financial statements.

121

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

10. Income Taxes (Continued)

For the three years ended December 31, 2017,  2016, and 2015, the provision  for income taxes consisted
of:

Year-Ended
December 31,

2017

2016

2015

(in millions)

Current

Federal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State and local
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 76(1) $ 1

$ 4
— —
24
34

1
32

Total current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

109

35

28

Deferred

Federal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
State and local
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

148(2)
—
(1)

Total deferred . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

147

$256

30
14
— —
1
(3)

27

15

$62

$43

(1) Includes $62 million of Transition Tax  under the Tax Act.

(2) Includes the remeasurement of deferred tax assets and liabilities  of $115 million due to

the Tax Act.

A reconciliation of the statutory U.S. Federal income tax  rate  of 35% to the Company’s effective tax
rate for the three years ending December 31,  2017, 2016, and 2015 is set  forth below:

Year-Ended December 31,

2017

2016

2015

U.S. Statutory Tax Rate . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less: rate attributable to noncontrolling interests . . . . . . . .
State, local and foreign taxes, net of federal  benefit . . . . . .

35.0% 35.0% 35.0%
(26.5)% (28.2)% (28.2)%
2.1% 1.3% 2.6%

Subtotal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10.6% 8.1% 9.4%

Effects of the Tax Act . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13.7% 0.0% 0.0%

24.3% 8.1% 9.4%

122

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

10. Income Taxes (Continued)

Significant components of the Company’s deferred tax assets and liabilities, which are  reported in other
assets and in other liabilities and accrued expenses,  respectively,  in the  consolidated  statements  of
financial condition, as of December 31,  2017, 2016, and 2015 were as  follows:

December 31,

2017

2016

2015

(in millions)

Deferred tax assets

Arising from the acquisition of interests  in IBG LLC . . . . . .
Deferred compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$146
4
7

Total deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

157

$273
6
18

297

$288
5
18

311

Deferred tax liabilities

Foreign, primarily THE . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total deferred tax liabilities . . . . . . . . . . . . . . . . . . . . . . . . . .

1
—

1

2
1

3

3
—

3

Net deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$156

$294

$308

As of and for the years ended December 31, 2017 and 2016,  the  Company had no  unrecognized tax
and no valuation allowances on deferred  tax assets were required. The Company  is subject  to  taxation
in the U.S. and various states and foreign  jurisdictions. As of December 31, 2017,  the Company is no
longer subject to U.S. Federal and State income tax  examinations for tax years prior to 2010, and to
non-U.S.  income tax examinations for tax years prior to 2008.

As of December 31, 2017, accumulated  earnings held  by non-U.S. subsidiaries totaled $1.1 billion (as of
December 31, 2016 $1.0 billion). Of this  amount,  approximately  $0.3 billion (as of December 31,  2016
$0.3 billion) is attributable to earnings of the Company’s foreign subsidiaries  that  are considered
‘‘pass-through’’ entities for U.S. income  tax purposes. Since the Company  accounts for U.S.  income
taxes on  these earnings on a current basis, no additional  U.S. tax consequences would result from the
repatriation of these earnings other than that which  would be due  arising from currency fluctuations
between the time the earnings are reported for U.S. tax purposes and when  they are remitted.  With
respect to certain of these subsidiaries’  accumulated earnings (approximately $0.2  billion and
$0.2 billion as of December 31, 2017 and December 31,  2016, respectively), repatriation  would result  in
additional foreign taxes in the form of dividend withholding tax imposed  on the recipient  of the
distribution or dividend distribution tax imposed on  the payor of the distribution.  The Company has
not provided for its proportionate share of these  additional foreign  taxes as it does not intend  to
repatriate these earnings in the foreseeable  future. For the same reason, the  Company has not provided
deferred U.S. tax on cumulative translation adjustments associated with these earnings.

123

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

11. Property, Equipment and Intangible  Assets

Property, equipment and intangible assets, which are included  in other assets in the consolidated
statements of financial condition, consist  of leasehold improvements,  computer equipment, software
developed for the Company’s internal use,  office furniture, equipment and  acquired  technology. As  of
December 31, 2017 and 2016, property, equipment and intangible  assets consisted  of:

Leasehold improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Computer equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Office furniture and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Less—accumulated depreciation and amortization . . . . . . . . . . . . . . . .

Property and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Internally developed software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intangible assets (acquired technology) . . . . . . . . . . . . . . . . . . . . . . . .
Less—accumulated amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intangible assets, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31,

2017

2016

(in millions)
$ 6
$ 7
14
17
2
2

26
(12)

14

52
8
(31)

29

22
(9)

13

49
7
(28)

28

Total property, equipment, and intangible assets, net . . . . . . . . . . . . . .

$ 43

$ 41

Depreciation and amortization of $25  million, $25 million, and $22  million, for the three  years  ended
December 31, 2017, 2016, and 2015,  respectively, is  included in  occupancy, depreciation and
amortization expenses in the consolidated statements of  comprehensive income. Amortization  expense
related to intangible assets is expected  to  be approximately $16 million, $10 million, and $3 million, for
years ended December 31, 2018, 2019, and 2020, respectively.

12. Commitments, Contingencies and  Guarantees

Claims against Customers

On January 15, 2015, due to the sudden move in the  value  of the Swiss franc  that  followed  an
unprecedented action by the Swiss National  Bank, which removed a previously instituted and repeatedly
reconfirmed cap of the currency relative to the Euro, several  of  the Company’s  customers  who held
currency futures and spot positions suffered losses in  excess  of  their  deposits  with the Company. The
Company took immediate action to hedge its exposure  to  the foreign currency receivables from these
customers. The Company estimates the cumulative losses related to this  event,  net of hedging activity
and debt collection efforts, to be approximately  $116 million. The Company is actively pursuing
collection of the debts. The ultimate effect of this incident on the Company’s results will depend upon
the outcome of the Company’s debt collection efforts.

Litigation

The Company is subject to certain pending and threatened legal actions which arise out of  the normal
course of business. Litigation is inherently  unpredictable,  particularly in  proceedings where claimants
seek substantial or indeterminate damages, or which  are in their  early stages.  The  Company has  not

124

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

12. Commitments, Contingencies and  Guarantees (Continued)

been able to quantify the actual loss or range of loss related to such legal proceedings,  the manner in
which they will be resolved, the timing  of final resolution  or the ultimate settlement. Management
believes that the resolution of these actions will not have a material  effect, if any, on the  Company’s
business or financial condition, but may have  a  material impact  on the results of operations for a given
period.

The Company accounts for potential  losses related to litigation in accordance with FASB ASC
Topic 450, ‘‘Contingencies.’’ As of December 31,  2017 and 2016, reserves  provided for potential losses
related to litigation matters were not  material.

Trading Technologies Matter

On February 3, 2010, Trading Technologies  International,  Inc. (‘‘Trading Technologies’’) filed a
complaint in the U.S. District Court for the Northern  District of Illinois,  Eastern Division,  against
IBG, Inc., IBG LLC, Holdings, and IB  LLC. Thereafter,  Trading Technologies dismissed IBG,  Inc. and
Holdings from the case, leaving only IBG LLC and IB LLC  as defendants  (‘‘Defendants’’). The
operative complaint, as amended, alleges that  the Defendants  have infringed and  continue to infringe
twelve U.S. patents held by Trading Technologies. Trading Technologies is seeking,  among  other  things,
unspecified damages and injunctive relief (‘‘the  Litigation’’). The Defendants filed an answer  to  Trading
Technologies’ amended complaint, as  well as  related  counterclaims. The Defendants deny Trading
Technologies’ claims, assert that the asserted patents  are  not  infringed and are invalid, and assert
several other defenses as well. Trading Technologies also filed patent infringement  lawsuits  against
approximately a dozen other companies in the same court. The Litigation  was consolidated with the
other  lawsuits filed by Trading Technologies.

The Defendants and/or certain codefendants  filed petitions with the United States Patent and
Trademark Office (‘‘USPTO’’) for Covered  Business Method  Review (‘‘CBM  Review’’) on the asserted
patents. The District Court granted the Defendants’ motion  to  stay the Litigation pending the CBM
Reviews. The USPTO Patent Trial Appeal  Board found  ten of the twelve asserted patents to be not
patentable and two patents to be patentable. The Defendants  have filed  appeals on the claims that
were held to be patentable.

It is difficult to predict the outcome of  the matter,  however, the  Company believes  it has  meritorious
defenses to the allegations made in the complaint  and  intends to defend itself vigorously against  them.
However, litigation is inherently uncertain and there can be no  guarantee  that  the Company will prevail
or that the Litigation can be settled on favorable terms.

Class Action Matter

On December 18, 2015, a former individual customer filed a purported class action complaint against
IB LLC, IBG, Inc., and Thomas Frank,  PhD, the Company’s Executive Vice President and  Chief
Information Officer, in the U.S. District Court for the District of Connecticut.  The  complaint alleges
that the former customer and members of the purported class of IB LLC’s  customers  were harmed  by
alleged ‘‘flaws’’ in the computerized system used by the Company to close out (i.e., liquidate) positions
in customer brokerage accounts that have margin deficiencies. The  complaint  seeks, among other
things, undefined compensatory damages and declaratory and  injunctive relief.

125

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

12. Commitments, Contingencies and  Guarantees (Continued)

On February 19, 2016, the Company  filed a motion to dismiss the  class action  complaint.  On
September 28, 2016, the Court issued an order granting  the Company’s motion to dismiss and
dismissing the complaint in its entirety,  and  without providing  plaintiff  leave to amend. On October 5,
2016, the Court entered judgment in the Company’s favor.  On October 12, 2016,  plaintiff  filed motions
for leave to file an amended complaint and to vacate or amend judgment. On  November 14, 2016,
plaintiff  also filed a motion to disqualify the  district judge. The Company opposed all three motions. In
memoranda of decision dated August 29, 2017  and September 5, 2017,  the  Court denied the motions.
On September 28,  2017, plaintiff appealed  the order of dismissal and subsequent judgment to the
United States Court of Appeals for the  Second Circuit. On January 9,  2018, the  plaintiff  filed his
appellate brief. The opposition brief is currently due on April 10, 2018. We believe that the  appeal, like
the original complaint, lacks merit. Further, even  if the Court’s dismissal  were to be overturned on
appeal, we do not believe that a purported  class  action is  appropriate given the  great differences in
portfolios, markets and many other circumstances surrounding the liquidation of any particular
customer’s margin-deficient account. IB LLC  and  the related defendants intend to continue  to  defend
themselves vigorously against the case and,  consistent with past practice in  connection with  this  type of
unwarranted action, any potential claims for counsel fees and expenses  incurred in  defending the  case
shall be fully pursued against the plaintiff.

Leases

Operating Companies have non-cancelable operating leases covering  office space. All but  one of the
office space leases are subject to escalation clauses based on  specified costs  incurred by the respective
landlords and contain renewal elections. Rent expense calculated  on a straight-line basis for  the
Company was $15 million, $16 million  and  $14 million  for the three years ended  December 31, 2017,
2016, and 2015, respectively, and is included  in occupancy, depreciation and amortization expenses in
the consolidated statements of comprehensive income. As of December 31, 2017, the Company’s
minimum annual lease commitments  totaled $154  million, as follows:

Year

2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2022 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(in millions)

$ 15
10
10
10
14
95

$154

Guarantees

Certain of the Operating Companies provide  guarantees to securities and commodities clearing houses
and exchanges which meet the accounting  definition of a  guarantee  under FASB ASC Topic  460,
‘‘Guarantees.’’ Under standard membership agreements,  clearing  house  and exchange members are
required to guarantee collectively the performance  of  other members. Under the agreements,  if  a
member becomes unable to satisfy its  obligations,  other members would be required to meet shortfalls.
In the opinion of management, the Operating  Companies’ liability under these arrangements is  not

126

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

12. Commitments, Contingencies and  Guarantees (Continued)

quantifiable and could exceed the cash and securities  they have posted as  collateral.  However, the
potential for these Operating Companies to be required to make payments  under these arrangements  is
remote. Accordingly, no contingent liability  is carried in the consolidated statements of financial
condition for these arrangements.

In connection with its retail brokerage  business, IB LLC or other  electronic brokerage  Operating
Companies perform securities and commodities  execution, clearance and  settlement on  behalf of their
customers for whom they commit to settle trades submitted by such  customers with the respective
clearing  houses. If a customer fails to fulfill its  settlement obligations,  the respective  Operating
Company must fulfill those settlement  obligations.  No contingent liability is  carried on the consolidated
statements of financial condition for such customer obligations.

Other Commitments

Certain clearing houses, clearing banks and firms used by certain  Operating Companies  are given a
security interest in certain assets of those  Operating Companies held by those clearing organizations.
These assets may be applied to satisfy the  obligations  of  those Operating  Companies to the  respective
clearing  organizations.

13. Segment and Geographic Information

The Company has two operating business segments:  electronic brokerage and  market making. These
segments are supported by the corporate segment, which  provides centralized services and  executes the
Company’s currency diversification strategy.

The Company conducts its electronic brokerage business through certain  Interactive  Brokers
subsidiaries, which provide electronic  trade  execution  and  clearing services to customers worldwide. The
Company conducts its remaining market making business  (see Note 2—Discontinued Operations and
Costs Associated with Exit or Disposal Cost) principally through its Timber  Hill subsidiaries on  some of
the world’s leading exchanges and market  centers, primarily in exchange-traded equities, equity options
and  equity-index options and futures.

Significant transactions and balances  between the Operating Companies occur, primarily as a  result of
certain Operating Companies holding exchange  or  clearing organization memberships, which  are
utilized to provide execution and clearing services to affiliates. Charges  for  transactions between
segments are designed to approximate full  costs.  Intra-segment  and intra-region income and expenses
and  related balances have been eliminated in this segment and  geographic information to reflect the
external business conducted in each segment or geographic region. Corporate items include
non-allocated corporate income and expenses  that are not attributed to segments  for performance
measurement, net gains and losses on positions held as  part of the Company’s overall  currency
diversification strategy, corporate assets and eliminations.

127

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

13. Segment and Geographic Information (Continued)

Management believes that the following information by business segment provides a reasonable
representation of each segment’s contribution  to  total net  revenues and income before  income  taxes for
the years ended December 31, 2017,  2016, and 2015, and  total assets  as of December 31, 2017,  2016,
and  2015:

Year-Ended December 31,

2017

2016

2015

(in millions)

Net revenues
Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,405
86
211

$1,239
190
(33)

$1,097
298
(206)

Total net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,702

$1,396

$1,189

Income before income taxes
Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 860
(27)
216

$ 756
44
(39)

$ 536
130
(208)

Total income before income taxes . . . . . . . . . . . . . . . . . .

$1,049

$ 761

$ 458

December 31,

2017

2016

2015

(in millions)

Segment assets
Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$58,787
8,469
(6,094)

$50,072
11,765
(7,164)

$44,421
10,825
(6,512)

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$61,162

$54,673

$48,734

The Company operates its automated global business  in the U.S. and international markets on  more
than 120 electronic exchanges and market  centers.  A significant portion of the  Company’s net  revenues
are generated by subsidiaries operating outside the  U.S. International  operations are  comprised of
electronic brokerage and market making activities in 25 countries in Europe, Asia and the Americas
(outside the U.S.). The following table presents total net revenues and income before income taxes by
geographic area for the years ended  December  31, 2017,  2016,  and 2015. The geographic  analysis
presented below is based on the location of the subsidiaries in  which the transactions are recorded.
This geographic information does not  reflect the way  the Company’s  business  is managed.

128

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

13. Segment and Geographic Information (Continued)

Year-Ended December 31,

2017

2016

2015

(in millions)

Net revenues
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International

$1,393
309

$1,046
350

$ 832
357

Total net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,702

$1,396

$1,189

Income before income taxes
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International

$ 947
102

$ 632
129

$ 294
164

Total income before income taxes . . . . . . . . . . . . . . . . . .

$1,049

$ 761

$ 458

14. Regulatory Requirements

As of December 31, 2017, aggregate  excess regulatory capital for all of the  Operating Companies was
$4.5 billion.

IB LLC, TH LLC and IB Corp are subject to the  Uniform  Net Capital  Rule (Rule 15c3-1) under the
Exchange Act, IB LLC is also subject to the Commodities and  Futures Trading Commission’s minimum
financial requirements (Regulation 1.17), and THE is subject  to  the Swiss  Financial Market  Supervisory
Authority eligible equity requirement.  IBA  is subject to the  Australian Securities Exchange liquid
capital requirement, THLI is subject  to  the Financial Market Authority  Liechtenstein  eligible capital
requirements, THC and IBC are subject  to  the Investment  Industry Regulatory  Organization  of Canada
risk adjusted capital requirement, IBUK is subject to the U.K.  Financial Conduct Authority Capital
Requirements Directive, IBHK is subject to the Hong Kong Securities Futures Commission  liquid
capital requirement, IBI is subject to the National Stock Exchange of India net  capital requirements
and IBSJ is subject to the Japanese Financial Supervisory Agency  capital requirements. The following
table summarizes capital, capital requirements and excess regulatory capital:

IB LLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TH  LLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other regulated operating companies . . . . . . . . .

Net Capital/
Eligible Equity

Requirement

Excess

$3,548
279
614
773

$5,214

(in millions)
$495
1
92
121

$709

$3,053
278
522
652

$4,505

Regulatory capital requirements could  restrict  the Operating Companies  from expanding their business
and declaring dividends if their net capital does not  meet regulatory requirements. Also, certain
Operating Companies are subject to  other  regulatory restrictions and requirements.

As of December 31, 2017, all of the regulated  Operating Companies were  in compliance  with their
respective regulatory capital requirements.

129

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

15. Related Party Transactions

Receivable from affiliate, reported in other assets in the consolidated statement of financial condition,
represents amounts advanced to Holdings and payable to affiliate  represents  amounts  payable to
Holdings under the Tax Receivable Agreement (see Note 4).

Included  in receivables from and payables to customers in the consolidated  statements of financial
condition as of December 31, 2017 and December 31, 2016 were accounts  receivable from directors,
officers and their affiliates of $250 million and $78 million and payables of $648 million and
$468 million, respectively. The Company may extend credit  to  these related parties in  connection with
margin loans. Such loans are (i) made in the ordinary course of business, (ii) are made on  substantially
the same terms, including interest rates and collateral,  as those prevailing  at the time for comparable
loans with persons not related to the  company,  and (iii)  do not involve more than the normal risk  of
collectability or present other unfavorable features.

16. Subsequent Events

As required by FASB ASC Topic 855, ‘‘Subsequent Events,’’ the Company has evaluated subsequent
events for adjustment to or disclosure  in its consolidated financial statements through the  date the
consolidated financial statements were  issued.

Except as disclosed in Note 4 and Note  12, no other recordable or disclosable  events occurred.

*****

130

SUPPLEMENTARY DATA

Unaudited Quarterly results

The Company’s unaudited quarterly  results  for 2017 and 2016 reflect the  condensed  consolidated
operating results of IBG, Inc. and its subsidiaries.

2017 Quarterly Data

First

Second

Third

Fourth

(in millions)

Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 409
35

$ 438
51

$ 487
61

$ 593
78

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

374

387

426

515

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation and benefits . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total non-interest expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less net income attributable to noncontrolling interests . . . . . . . . . . .

61
62
38

161

213
18
171

63
66
54

183

204
17
164

61
64
33

158

268
21
216

56
57
38

151

364
200
166

Net income available for common stockholders . . . . . . . . . . . . . . . . .

$ 24

$ 23

$ 31

$

(2)

Basic earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$0.35

$0.33

$0.44

$(0.02)

Diluted earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$0.34

$0.32

$0.43

$(0.02)

Net income (loss) available for common  stockholders . . . . . . . . . . . . .
Other comprehensive income

Cumulative translation adjustment, before income taxes . . . . . . . . . .
Income taxes related to items of other comprehensive income . . . . .

Other comprehensive income, net of  tax . . . . . . . . . . . . . . . . . . . . . .

$ 24

$ 23

$ 31

$

(2)

4
—

4

6
—

6

1
—

1

—
—

—

Comprehensive income (loss) available  for common  stockholders . . . .

$ 28

$ 29

$ 32

$

(2)

Comprehensive income attributable to  noncontrolling interests

Net income attributable to noncontrolling  interests . . . . . . . . . . . . .
Other comprehensive income (loss)—cumulative translation

$ 171

$ 164

$ 216

$ 166

adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19

31

5

(1)

Comprehensive income attributable to  noncontrolling interests . . . . . .

$ 190

$ 195

$ 221

$ 165

131

2016 Quarterly Data

First

Second

Third

Fourth

(in millions)

Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 507
18

$ 387
18

$ 366
21

$ 215
22

Net revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

489

369

345

193

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation and benefits . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total non-interest expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less net income attributable to noncontrolling interests . . . . . . . . . . . .

62
58
32

152

337
27
277

59
58
39

156

213
13
173

62
58
42

162

183
15
148

Net income available for common stockholders . . . . . . . . . . . . . . . . . .

$ 33

$ 27

$ 20

$

61
68
36

165

28
7
17

4

Basic earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$0.52

$0.41

$0.30

$0.07

Diluted earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$0.51

$0.40

$0.30

$0.07

Net income available for common stockholders . . . . . . . . . . . . . . . . . .
Other comprehensive income

Cumulative translation adjustment, before income taxes . . . . . . . . . .
Income taxes related to items of other comprehensive income . . . . .

Other comprehensive income (loss),  net of tax . . . . . . . . . . . . . . . . . .

$ 33

$ 27

$ 20

$

4

6
—

6

(3)
—

(3)

—
—

—

(7)
—

(7)

Comprehensive income (loss) available  for common  stockholders . . . . .

$ 39

$ 24

$ 20

$ (3)

Comprehensive income attributable to  noncontrolling interests

Net income attributable to noncontrolling  interests . . . . . . . . . . . . . .
Other comprehensive income (loss)—cumulative translation

$ 277

$ 173

$ 148

$ 17

adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

33

(16)

2

(40)

Comprehensive income (loss) attributable  to  noncontrolling interests . .

$ 310

$ 157

$ 150

$ (23)

132

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON  ACCOUNTING AND

FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Conclusion Regarding the Effectiveness of  Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures that  are  designed  to  provide reasonable
assurance that information required to be disclosed in  the reports it files or  submits under  the
Securities Exchange Act of 1934 (the ‘‘Exchange Act’’) is recorded, processed, summarized  and
reported accurately and within the time periods specified in the SEC’s rules and forms. Disclosure
controls and procedures include, without  limitation, controls  and  procedures designed to ensure  that
information required to be disclosed  by  the Company in the reports that it files  or submits under the
Exchange Act is accumulated and communicated to management, including  the Chief Executive Officer
(‘‘CEO’’) and Chief Financial Officer  (‘‘CFO’’), as appropriate, to allow timely decisions  regarding
required disclosure.

Under the supervision and with the participation of  our management, including  our  CEO and our
CFO, we conducted an evaluation of  our disclosure controls and procedures;  as such term is defined
under Exchange Act Rule 13a-15(e). Based  on this evaluation, our  CEO and our CFO concluded that
our  disclosure controls and procedures were  effective as of  the end of the  period covered by this
annual report.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal  control over
financial reporting. IBG, Inc.’s internal  control over financial reporting is  designed to provide
reasonable assurance regarding the reliability of  financial  reporting and  the preparation  of financial
statements for external purposes in accordance with U.S.  generally accepted accounting principles.

Our internal control over financial reporting includes those  policies and procedures that pertain  to  the
maintenance of records that, in reasonable  detail, accurately and fairly reflect the  transactions and
dispositions of the assets of IBG, Inc.; provide reasonable  assurance that transactions are recorded as
necessary to permit preparation of financial  statements  in accordance with U.S.  generally  accepted
accounting principles, and that our receipts and expenditures are being made  only  in accordance with
authorizations of IBG, Inc.’s management  and directors; and  provide reasonable assurance regarding
prevention or timely detection of unauthorized  acquisition,  use or  disposition of our assets that could
have a material effect on our financial statements.

In 2012, the Company’s management  created the  Accounting Policy  Committee (the ‘‘APC’’) to provide
a robust framework for the design and  implementation of all  relevant controls.  The APC  is comprised
of eight (8) experienced subject matter experts from  within the  Company’s accounting and regulatory
disciplines, and includes the CFO and the  Chief Accounting Officer. The APC is  responsible  for
assessing the effects of complex transactions  and related accounting guidance  on the Company’s
financial statements and to report the results  of its  assessments to management  and to the  Audit
Committee. The APC’s mandate includes  review and approval of  the adoption and implementation of
accounting guidance (new or newly applicable)  by  the Company.

Because of its inherent limitations, internal control over  financial  reporting may not prevent or detect
misstatements. Projections of any evaluation of effectiveness to future periods  are subject to the  risk
that controls may become inadequate because of changes in conditions, or that the  degree  of
compliance with the policies or procedures may deteriorate.

133

Management, including our CEO and  our  CFO, assessed the effectiveness of  IBG, Inc.’s  internal
control over financial reporting as of  December 31, 2017.  In  making this assessment,  management used
the criteria set forth in Internal Control—Integrated Framework (2013) issued by the Committee of
Sponsoring Organizations of the Treadway Commission (‘‘COSO’’). Based on management’s  assessment
and those criteria, management concluded  that IBG,  Inc. maintained effective internal control over
financial reporting as of December 31, 2017.

The effectiveness of the Company’s internal control over financial  reporting  as of December 31, 2017,
has been audited by Deloitte & Touche LLP, an independent  registered  public  accounting firm, as
stated in their report, which appears  herein.

Changes  to Internal Control over Financial Reporting

No changes to our internal control over  financial reporting  for the  year ended December  31, 2017 have
materially affected, or are reasonably  likely to materially  affect,  our internal control over financial
reporting.

134

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of
Interactive Brokers Group, Inc.
Greenwich, CT

Opinion on Internal Control over Financial  Reporting

We  have audited the internal control over  financial reporting of  Interactive  Brokers  Group, Inc. and
subsidiaries (the ‘‘Company’’) as of December 31, 2017,  based on criteria  established in Internal
Control—Integrated Framework (2013)  issued by  the Committee of Sponsoring  Organizations  of the
Treadway Commission (COSO). In our  opinion, the  Company maintained, in  all  material  respects,
effective internal control over financial reporting as of December 31,  2017, based on criteria established
in Internal Control—Integrated Framework (2013) issued by COSO.

We  have also audited, in accordance  with the standards of  the Public Company Accounting Oversight
Board (United States), the consolidated statements  of  financial  condition as of  December 31,  2017 and
2016 and the related consolidated statements of comprehensive  income, cash flows, and changes in
equity for each of  the three years in  the  period ended  December  31, 2017, of the Company and  our
report dated February 28, 2018, expressed an unqualified opinion  on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over  financial
reporting and for its assessment of the  effectiveness  of  internal control  over financial reporting,
included in the accompanying Management’s  Report on Internal Control  over Financial Reporting. Our
responsibility is to express an opinion  on  the Company’s internal control over financial  reporting based
on our audit. We are a public accounting firm registered with  the PCAOB and  are required  to  be
independent with respect to the Company in accordance  with the  U.S. federal securities  laws  and the
applicable rules and regulations of the Securities and Exchange  Commission and  the PCAOB.

We  conducted our audit in accordance  with the standards of  the PCAOB. Those standards require that
we plan and perform the audit to obtain reasonable assurance  about  whether  effective  internal control
over financial reporting was maintained  in all material respects. Our audit included obtaining an
understanding of internal control over  financial reporting, assessing the  risk that a  material  weakness
exists, testing and evaluating the design  and operating effectiveness of internal control based on the
assessed risk, and performing such other  procedures as we considered  necessary  in the circumstances.
We  believe that our audit provides a reasonable basis  for  our opinion.

Definition and Limitations of Internal  Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide  reasonable
assurance regarding the reliability of  financial  reporting and the preparation  of  financial  statements  for
external  purposes in accordance with  generally accepted accounting  principles. A company’s internal
control over financial reporting includes those policies and procedures that (1)  pertain to the
maintenance of records that, in reasonable  detail, accurately and fairly reflect the  transactions and
dispositions of the assets of the company; (2) provide reasonable assurance that transactions  are
recorded  as necessary to permit preparation of financial statements in  accordance with generally
accepted accounting principles, and that receipts and expenditures of the company are being made  only
in accordance with authorizations of management and directors of the company; and  (3) provide
reasonable assurance regarding prevention  or timely detection of unauthorized acquisition, use, or
disposition of the company’s assets that  could have a material effect on the financial statements.

135

Because of its inherent limitations, internal control over  financial  reporting may not prevent or detect
misstatements. Also, projections of any evaluation of effectiveness to future  periods are subject to the
risk that controls may become inadequate because of changes  in conditions, or that the  degree  of
compliance with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP
New York, New York
February 28, 2018

136

ITEM 9B. OTHER INFORMATION

Not applicable.

PART III

ITEM 10. DIRECTORS, EXECUTIVE  OFFICERS AND CORPORATE GOVERNANCE

Information related to the Company’s  directors and nominees under the following captions in the
Company’s Proxy Statement is incorporated by reference  herein:

(cid:127) ‘‘Item 1—Election of Directors’’

(cid:127) ‘‘Item 1—Election of Directors—Board Meetings  and Committees’’

Code of Ethics

IBG, Inc.’s Code of Ethics and Business Conduct  applies to  all directors, officers and employees,
including its Chief Executive Officer,  its  Chief  Financial Officer and its Chief  Accounting  Officer.
Information relating to our Code of Business  Conduct and  Ethics is included in Part I, Item  1 of this
Annual Report on Form 10-K. We will  post  any amendments to the Code of Ethics and Business
Conduct, and any waivers that are required to be disclosed  by the rules of either  the SEC or NASDAQ
on the investor relations section of our website located  at www.interactivebrokers.com/ir.

ITEM 11. EXECUTIVE COMPENSATION

Information relating to director and executive officer  compensation  under the following captions in  the
Company’s Proxy Statement is incorporated by reference  herein:

(cid:127) ‘‘Compensation of Directors’’

(cid:127) ‘‘Executive Compensation’’

ITEM 12. SECURITY OWNERSHIP  OF CERTAIN  BENEFICIAL  OWNERS AND MANAGEMENT

AND RELATED STOCKHOLDER MATTERS

Other information relating to security  ownership of certain beneficial  owners and management  is set
forth under the caption ‘‘Beneficial Ownership  of  Directors, Executive Officers and  Owners of More
than Five Percent’’ in the Company’s Proxy  Statement and such information is  incorporated by
reference herein.

ITEM 13. TRANSACTIONS WITH  RELATED PERSONS, PROMOTERS AND CERTAIN  CONTROL

PERSONS

Information regarding certain relationships  and related transactions under the following caption in the
Company’s Proxy Statement and such information is incorporated by reference  herein:

(cid:127) ‘‘Certain Relationships and Related Transactions’’

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

Information regarding principal accounting fees and under  the following caption  in the Company’s
Proxy Statement is incorporated by reference herein:

(cid:127) ‘‘Item 3—Ratification of Appointment  of  Independent Registered Public Accounting Firm’’

137

ITEM 15. EXHIBITS AND FINANCIAL  STATEMENT SCHEDULES

PART IV

Documents filed as part of this report

1. Consolidated Financial Statements

The consolidated financial statements required to be filed  in the Annual Report on  Form 10-K are
listed on page F-1 hereof and in Part II,  Item  8 hereof.

2.

Financial Statement Schedule

The financial statement schedule required in  the Annual Report on  Form 10-K  is listed on page  F-1
hereof. The required schedule appears  on  pages  F-1  through F-5 hereof.

138

3. Exhibits

Exhibit
Number

Description

3.1 Amended and Restated Certificate of Incorporation of Interactive  Brokers Group,  Inc.

(filed as Exhibit 3.1 to Amendment No. 2 to the  Registration Statement on Form S-1  filed
by the Company on April 4, 2007).**

3.2 Amended bylaws of Interactive Brokers Group,  Inc.  (filed as  Exhibit 3.1 to the  Form  8-K

filed by the Company on February 24, 2016).**

10.1 Amended and Restated Operating Agreement of IBG LLC  (filed as  Exhibit  10.1 to the

Quarterly Report on Form 10-Q for the Quarterly Period Ended March 31,  2007 filed by
the Company on June 15, 2007).**

10.2 Form of Limited Liability Company  Operating Agreement of  IBG Holdings  LLC (filed  as
Exhibit 10.5 to Amendment No. 1 to  the Registration Statement  on Form S-1  filed by the
Company on February 12, 2007).**

10.3 Exchange Agreement by and among  Interactive  Brokers  Group, Inc.,  IBG Holdings  LLC,

IBG LLC and the Members of IBG LLC (filed as Exhibit  10.3 to the Quarterly  Report on
Form 10-Q for the Quarterly Period Ended September 30,  2009 filed by the Company on
November 11, 2009).**

10.4 Tax Receivable Agreement by and  between Interactive Brokers Group, Inc. and IBG

Holdings LLC (filed as Exhibit 10.3 to the Quarterly  Report on Form 10-Q for the
Quarterly Period Ended March 31, 2007 filed by the Company  on  June 15, 2007).**

10.5 Amended Interactive Brokers  Group, Inc. 2007 Stock  Incentive  Plan. (filed as  Exhibit  10.5

to Form 10-K for the Year Ended December 31, 2014  filed by the  Company on  March 2,
2015)**+

10.6

10.7

10.8

Interactive Brokers Group, Inc. 2007 ROI Unit  Stock  Plan.  (filed as Exhibit 10.9 to
Amendment No. 2 to the Registration  Statement on  Form  S-1 filed by the Company on
April 4, 2007).**+

Interactive Brokers Group, Inc. Amendment to the Exchange Agreement (filed as
Exhibit 10.1 to the Form 8-K filed by the Company on  June 6, 2012).**+

Second Amendment to Exchange  Agreement  by and among Interactive Brokers
Group, Inc., IBG Holdings LLC, IBG (filed as  Exhibit 10.1 to the Quarterly Report on
Form 10-Q for the Quarterly Period Ended September 31,  2015 filed by the Company on
November 9, 2015).**

10.9 First Amendment to Limited Liability  Company Agreement of IBG Holdings LLC (filed as
Exhibit 10.2 to the Quarterly Report on Form 10-Q  for the  Quarterly Period Ended
September 31, 2015 filed by the Company on November 9, 2015).**

11.1

Statement Re; Computation of Earnings per Common Share (the calculation of per share
earnings is disclosed in Part II, Item 8,  Note 4  to  the Consolidated Financial Statements
‘‘Equity and Earnings per Share’’ and  is omitted  in accordance with  Item 601
Section (b)(11) of Regulation S-K).

21.1

Subsidiaries of the registrant.

23.1 Consent of Independent Registered Public  Accounting Firm.

139

Exhibit
Number

Description

31.1 Certification of Chief Executive Officer, pursuant to Section 302  of  the Sarbanes-Oxley  Act

of 2002.

31.2 Certification of Chief Financial Officer, pursuant to Section 302  of the Sarbanes-Oxley Act

of 2002.

32.1 Certification of Chief Executive Officer, pursuant to Section 906  of  the Sarbanes-Oxley  Act

of 2002.

32.2 Certification of Chief Financial Officer, pursuant to Section 906  of the Sarbanes-Oxley Act

of 2002.

101.INS XBRL Instance Document*

101.SCH XBRL Extension Schema*

101.CAL XBRL Extension Calculation  Linkbase*

101.DEF XBRL Extension Definition Linkbase*

101.LAB XBRL Extension Label Linkbase*

101.PRE XBRL Extension Presentation Linkbase*

** Previously filed; incorporated herein  by  reference.

+ These exhibits relate to management contracts or compensatory  plans or  arrangements.

* Attached as Exhibit 101 to this Annual Report  on Form  10-K for the annual period  ended

December 31, 2016, are the following materials formatted in XBRL (Extensible Business
Reporting Language) (i) the Consolidated Statements of Financial Condition, (ii) the Consolidated
Statements of Comprehensive Income,  (iii) the  Consolidated  Statements of Cash Flows,  (iv) the
Consolidated Statement of Changes in Stockholders’ Equity and (v) Notes to the Consolidated
Financial Statements tagged in detail levels 1-4.

140

ITEMS.  15 (a)(1) and 15 (a)(2) INDEX  TO FINANCIAL  STATEMENTS AND FINANCIAL

STATEMENT SCHEDULE

Financial Statement Schedule

Schedule I—Condensed Financial Information of Registrant (Parent  Company Only)

Report of Independent Registered Public Accounting  Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1
Condensed Statements of Financial Condition as  of December  31, 2017 and 2016 . . . . . . . . . . F-2
Condensed Statements of Comprehensive Income for  the Years ended December  31, 2017,

2016, and 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3
Condensed Statements of Cash Flow  for  the Years ended December 31, 2017, 2016, and 2015 . F-4
Notes to Condensed Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5

141

(This page has been left blank intentionally.)

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of
Interactive Brokers Group, Inc.
Greenwich, CT

Opinion on the Financial Statement  Schedules

We  have audited the consolidated financial  statements  of  Interactive  Brokers Group, Inc.  and
subsidiaries (the ‘‘Company’’) as of December 31, 2017  and 2016,  and for each  of  the three years in  the
period ended December 31, 2017, and the Company’s  internal control over financial reporting as  of
December 31, 2017, and have issued our reports  thereon dated February 28, 2018; such  reports are
included elsewhere in this Form 10-K.  Our audits also  included the financial  statement  schedules  of  the
Company listed in the Index at Item 15.  These condensed financial statement  schedules  are the
responsibility of the Company’s management. Our responsibility is  to  express  an opinion on the
Company’s financial statement schedules  based on our audits. In  our opinion, such condensed  financial
statement schedules, when considered in relation to the  consolidated financial statements  taken as  a
whole, present fairly, in all material respects, the information set forth therein.

/s/ Deloitte & Touche LLP
New York, New York
February 28, 2018

We  have served as the Company’s auditor since 1990.

F-1

INTERACTIVE BROKERS GROUP, INC.

(Parent Company Only)

CONDENSED STATEMENTS OF FINANCIAL CONDITION

(in millions,  except share amounts)

December 31,

2017

2016

Assets
Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investments in subsidiaries, equity basis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ — $ —
964
1,122
297
156

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,278

$1,261

Liabilities and Equity
Liabilities:
Payable to affiliates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued expenses and other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stockholders’ equity:

Common stock, $0.01 par value per share:
Class A—Authorized—1,000,000,000, Issued—71,609,049  and 68,119,412  shares,
Outstanding—71,475,755 and 67,984,973 shares as of December 31,  2017 and
2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Class B—Authorized, Issued and Outstanding—100  shares  as of December  31,

2017 and 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional paid-in capital
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive income, net of  income  taxes  of $1 and $0  as of

December 31, 2017 and 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Treasury stock, at cost, 133,294 and 134,439 shares as of December 31, 2017 and

2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 187
1

$ 285
2

188

287

1

—
832
251

9

(3)

1

—
775
203

(2)

(3)

Total equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,090

974

Total liabilities and equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,278

$1,261

See accompanying notes to the condensed  financial  statements.

F-2

INTERACTIVE BROKERS GROUP, INC.

(Parent Company Only)

CONDENSED STATEMENTS OF COMPREHENSIVE INCOME

(in millions)

Year-Ended
December 31,

2017

2016

2015

Income (loss) before income from subsidiaries . . . . . . . . . . . . . . . . . . . . . . . . . .
Undistributed gains of subsidiaries, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 92
147
163

$ (1) $ —
67
18

117
32

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 76

$ 84

$ 49

Net income available for common stockholders . . . . . . . . . . . . . . . . . . . . . . . . . .
Cumulative translation adjustment, net  of  tax . . . . . . . . . . . . . . . . . . . . . . . . . . .

Comprehensive income available for common stockholders . . . . . . . . . . . . . . . . .

$ 76
11

$ 87

$ 84
(4)

$ 49
(10)

$ 80

$ 39

See accompanying notes to the condensed  financial  statements.

F-3

INTERACTIVE BROKERS GROUP, INC.

(Parent Company Only)

CONDENSED STATEMENTS OF CASH  FLOWS

(in millions)

Cash flows from operating activities

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments to reconcile net income to net cash provided by operating

activities
Undistributed gains of subsidiaries, net . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on remeasurement of Tax Receivable Agreement liability . . . . . . . . . .
Changes in operating assets and liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net cash (used in) provided by operating activities . . . . . . . . . . . . . . . . . . . . . .

Cash flows provided by investing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cash flows used in financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Effect of exchange rate changes on cash  and cash  equivalents . . . . . . . . . . . . . .

Net increase (decrease) in cash and cash equivalents . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents at beginning of period . . . . . . . . . . . . . . . . . . . . . . .

Year-Ended
December 31,

2017

2016

2015

$ 76

$ 84

$ 49

(147)
149
(93)
(9)

(24)

56

(43)

11

—
—

(117)
30
—
9

6

42

(44)

(5)

(67)
13
—
9

4

40

(34)

(10)

(1) —
1
1

Cash and cash equivalents at end of  period . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ — $ — $ 1

Supplemental disclosures of cash flow  information

Cash paid for interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ — $ — $ —

Cash paid for taxes, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 13

$

(1) $ —

Non-cash investing activities:

Non-cash distributions from subsidiaries . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ — $

1

$ —

See accompanying notes to the condensed  financial  statements.

F-4

INTERACTIVE BROKERS GROUP, INC.

(Parent Company Only)

NOTES TO CONDENSED FINANCIAL STATEMENTS

1. Basis of Presentation

The accompanying condensed financial  statements (the  ‘‘Parent  Company Financial  Statements’’) of
Interactive Brokers Group, Inc. (‘‘IBG, Inc.’’), a Delaware  holding company,  including the  notes
thereto, should be read in conjunction with the consolidated financial  statements  of  IBG, Inc.  and its
subsidiaries (the ‘‘Company’’) and the  notes thereto. IBG, Inc.’s  primary asset is its ownership interest
in IBG LLC, an automated global electronic  broker and  market maker  specializing  in executing and
clearing trades in securities, futures, foreign exchange instruments,  bonds  and mutual  funds on more
than 120 electronic exchanges and market  centers  around the world and offering custody, prime
brokerage, securities and margin lending services to customers.

The preparation of the Parent Company Financial Statements  in conformity  with accounting principles
generally accepted in the United States requires  management to make estimates and  assumptions  that
affect the reported amounts and disclosures in  the condensed financial statements and accompanying
notes.

Income Taxes

Refer to Note 2 to the consolidated financial  statements.

2. Related Party Transactions

As of December 31, 2107, there were  no receivables from affiliates. Dividends  received  from IBG  LLC
for the three years ended December  31, 2017, 2016, and 2015, were  $56 million,  $43 million, and
$40 million, respectively.

As of December 31, 2017 and 2016, respectively,  payable to  affiliates  of $187 million and  $285 million
consisted primarily of amounts payable to Holdings under the Tax Receivable  Agreement.

3. Stockholders’ Equity

Refer to Note 4 to the consolidated financial  statements.

4. Employee Incentive Plans

Refer to Note 9 to the consolidated financial  statements.

5. Commitments, Contingencies and  Guarantees

Refer to Note 12 to the consolidated financial  statements.

6. Subsequent Events

As required by FASB ASC Topic, ‘‘Subsequent  Events,’’  IBG, Inc.  has evaluated subsequent events for
adjustment to or disclosure in its condensed financial statements through the  date the  condensed
financial statements were issued.

Except as disclosed in Note 4 and Note  12 to the consolidated financial statements, no other
recordable or disclosable events occurred.

****

F-5

(This page has been left blank intentionally.)

Pursuant to the requirements of Section  13  or 15(d) the Securities Exchange Act  of 1934, the registrant
has duly caused this report to be signed  on its  behalf  by the undersigned thereunto duly authorized.

SIGNATURES

INTERACTIVE BROKERS GROUP, INC.

/s/ PAUL J. BRODY

Name: Paul J. Brody
Title:

Chief Financial Officer, Treasurer and
Secretary

(Signing both in his capacity as a duly authorized
officer and as principal financial officer of the
registrant)

Date: February 28, 2018

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has  been signed  by
the following persons on behalf of the registrant and  in the capacities and  on the  dates indicated:

Signature

Title

Date

/s/ THOMAS PETERFFY

Thomas Peterffy

Chairman of the Board of
Directors and Chief Executive
Officer (Principal Executive
Officer)

February 28, 2018

/s/ DENIS MENDONCA

Denis Mendonca

Chief Accounting Officer
(Principal Accounting Officer)

February 28, 2018

/s/ LAWRENCE E. HARRIS

Lawrence E. Harris

Director

February 28, 2018

/s/ GARY KATZ

Gary Katz

/s/ RICHARD GATES

Richard Gates

Director

February 28, 2018

Director

February 28, 2018

(This page has been left blank intentionally.)

EXHIBIT 21.1

SUBSIDIARIES OF THE COMPANY

Name

Jurisdiction of Organization

IBG LLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connecticut, U.S.A.

The following is a list of subsidiaries  of IBG LLC:

Name

Jurisdiction of Organization

Timber Hill LLC(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connecticut, U.S.A.
Interactive Brokers LLC(2) . . . . . . . . . . . . . . . . . . . . . . . . . Connecticut, U.S.A.
United Kingdom
Interactive Brokers (U.K.) Limited . . . . . . . . . . . . . . . . . . .
Australia
Timber Hill Australia Pty Limited . . . . . . . . . . . . . . . . . . . .
Canada
Timber Hill Canada Company . . . . . . . . . . . . . . . . . . . . . . .
Delaware, U.S.A.
IB Exchange Corp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interactive Brokers (India) Private Limited(3) . . . . . . . . . . .
India
Luxembourg
Interactive Brokers Financial Products S.A.
. . . . . . . . . . . . .
India
Interactive Brokers Software Services  (India) Private Limited

(1) IBG LLC owns 99.99% and Thomas  Peterffy owns 0.01%.

(2) IBG LLC owns 99.9% and Thomas  Peterffy  owns 0.1%.

(3) IB Exchange Corp. owns 0.01%

The following is a list of subsidiaries  of IB Exchange  Corp:

Name

Interactive Brokers Canada Inc.
Interactive Brokers Business Services (Shanghai) Company

. . . . . . . . . . . . . . . . . . . .

Jurisdiction of Organization

Connecticut, U.S.A.

Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interactive Brokers Hong Kong Limited . . . . . . . . . . . . . . .
Interactive Brokers Securities Japan, Inc. . . . . . . . . . . . . . .
Interactive Brokers Australia Pty Limited . . . . . . . . . . . . . .
Interactive Brokers Hungary KFT . . . . . . . . . . . . . . . . . . .
Interactive Brokers Software Services Estonia OU . . . . . . .
Interactive Brokers Software Services  Russia . . . . . . . . . . .
Interactive Brokers Corp . . . . . . . . . . . . . . . . . . . . . . . . . .
Covestor, Inc.
Timber Hill (Europe) AG . . . . . . . . . . . . . . . . . . . . . . . . .
Greenwich Advisor Compliance Services  Corp . . . . . . . . . .

China
China
Japan
Australia
Hungary
Estonia
Russia
Connecticut, U.S.A.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Massachusetts, U.S.A.
Switzerland
Delaware, U.S.A.

The following is a list of subsidiaries  of Timber Hill (Europe) AG:

Name

Jurisdiction of Organization

Timber Hill (Liechtenstein) AG . . . . . . . . . . . . . . . . . . . . .

Liechtenstein

The following is a list of subsidiaries  of Interactive Brokers (U.K.) Limited:

Name

Jurisdiction of Organization

Interactive Brokers (U.K.) Nominee Limited . . . . . . . . . . .

United Kingdom

The following is a list of subsidiaries  of  Interactive Brokers Australia Pty Limited:

Name

Jurisdiction of Organization

Interactive Brokers Australia Nominees  Pty Limited . . . . . .

Australia

The following is a list of subsidiaries  of Covestor, Inc.:

Name

Jurisdiction of Organization

Covestor Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

United Kingdom

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the  incorporation by reference in Registration  Statement Nos. 333-142686, 333-174913
and  333-203358 on Form S-8 and Registration No.  333-219552  on Form  S-3 of our reports  dated
February 28, 2018 relating to the consolidated financial statements and financial statement schedules of
Interactive Brokers Group, Inc. and subsidiaries’,  and the effectiveness of Interactive Brokers
Group, Inc. and subsidiaries internal control over  financial  reporting,  appearing in this Annual Report
on Form 10-K of Interactive Brokers Group,  Inc. and subsidiaries for  the  year  ended December  31,
2017.

Exhibit 23.1

/s/ Deloitte & Touche LLP
New York, New York
February 28, 2018

EXHIBIT 31.1

I, Thomas Peterffy, certify that:

CERTIFICATION

1.

I have reviewed this Annual Report  on Form  10-K for  the year  ended December 31, 2017  of
Interactive Brokers Group, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement  of  a material fact or

omit to state a material fact necessary  to  make the statements made,  in light  of the circumstances
under which such statements were made, not misleading  with respect to the period  covered by this
report;

3. Based on my knowledge, the financial statements, and  other financial  information included in  this
report, fairly present in all material respects  the financial condition, results of operations and  cash
flows of the registrant as of, and for, the  periods presented in  this report;

4. The registrant’s other certifying  officer(s) and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined  in Exchange  Act Rules 13a-15(e) and 15d-15(e))
and internal control over financial reporting (as defined in  Exchange Act  Rules 13a-15(f)  and
15d-15(f)) and have:

(a) Designed such disclosure controls and  procedures,  or caused such disclosure controls and

procedures to be designed under our  supervision, to ensure that material  information relating
to the registrant, including its consolidated  subsidiaries, is made  known to us by others within
those entities, particularly during the period in  which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision,  to  provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for
external  purposes in accordance with  generally accepted accounting  principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and  procedures  and

presented in this report our conclusions  about the effectiveness of the disclosure controls and
procedures, as of the end of the period covered  by this  report based on such evaluation; and

(d) Disclosed in this report any change  in the registrant’s  internal control  over financial  reporting
that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal
quarter in the case of an annual report) that has materially  affected, or is reasonably likely to
materially affect, the registrant’s internal  control over financial reporting; and

5. The registrant’s other certifying  officer(s) and I have disclosed,  based on our  most recent

evaluation of internal control over financial reporting, to the registrant’s auditors and the Audit
Committee of the registrant’s board  of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the  design or operation of internal

control over financial reporting which are  reasonably likely  to  adversely affect  the registrant’s
ability to record, process, summarize and report  financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a

significant role in the registrant’s  internal control over financial  reporting.

Date: February 28, 2018

By: /s/ THOMAS PETERFFY

Name: Thomas Peterffy
Title: Chairman and Chief Executive Officer

EXHIBIT 31.2

I, Paul J. Brody, certify that:

CERTIFICATION

1.

I have reviewed this Annual Report  on Form  10-K for  the year  ended December 31, 2017  of
Interactive Brokers Group, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement  of  a material fact or

omit to state a material fact necessary  to  make the statements made,  in light  of the circumstances
under which such statements were made, not misleading  with respect to the period  covered by this
report;

3. Based on my knowledge, the financial statements, and  other financial  information included in  this
report, fairly present in all material respects  the financial condition, results of operations and  cash
flows of the registrant as of, and for, the  periods presented in  this report;

4. The registrant’s other certifying  officer(s) and I are responsible for establishing and maintaining
disclosure controls and procedures (as defined  in Exchange  Act Rules 13a-15(e) and 15d-15(e))
and internal control over financial reporting (as defined in  Exchange Act  Rules 13a-15(f)  and
15d-15(f)) and have:

(a) Designed such disclosure controls and  procedures,  or caused such disclosure controls and

procedures to be designed under our  supervision, to ensure that material  information relating
to the registrant, including its consolidated  subsidiaries, is made  known to us by others within
those entities, particularly during the period in  which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision,  to  provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for
external  purposes in accordance with  generally accepted accounting  principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and  procedures  and

presented in this report our conclusions  about the effectiveness of the disclosure controls and
procedures, as of the end of the period covered  by this  report based on such evaluation; and

(d) Disclosed in this report any change  in the registrant’s  internal control  over financial  reporting
that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal
quarter in the case of an annual report) that has materially  affected, or is reasonably likely to
materially affect, the registrant’s internal  control over financial reporting; and

5. The registrant’s other certifying  officer(s) and I have disclosed,  based on our  most recent

evaluation of internal control over financial reporting, to the registrant’s auditors and the Audit
Committee of the registrant’s board  of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the  design or operation of internal

control over financial reporting which are  reasonably likely  to  adversely affect  the registrant’s
ability to record, process, summarize and report  financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a

significant role in the registrant’s  internal control over financial  reporting.

By: /s/ PAUL J. BRODY

Name: Paul J. Brody
Title: Chief Financial Officer, Treasurer and

Secretary

Date: February 28, 2018

CERTIFICATION

EXHIBIT 32.1

Pursuant to 18 U.S.C. § 1350, the undersigned officer  of Interactive Brokers Group,  Inc. (the
‘‘Company’’) hereby certifies that the Company’s  Annual  Report  on Form 10-K for the year ended
December 31, 2017 (the ‘‘Report’’) fully  complies  with the requirements of Section  13(a) or 15(d), as
applicable, of the Securities Exchange  Act of 1934 and that the  information contained  in the Report
fairly presents, in all material respects, the  financial condition and  results of  operations of  the
Company.

By: /s/ THOMAS PETERFFY

Name: Thomas Peterffy
Title: Chairman and Chief Executive Officer

Date: February 28, 2018

The foregoing certification is being furnished solely pursuant to 18 U.S.C. §  1350 and is not being filed
as part of the Report or as a separate  disclosure document.

CERTIFICATION

EXHIBIT 32.2

Pursuant to 18 U.S.C. § 1350, the undersigned officer  of Interactive Brokers Group,  Inc. (the
‘‘Company’’) hereby certifies that the Company’s  Annual  Report  on Form 10-K for the year ended
December 31, 2017 (the ‘‘Report’’) fully  complies  with the requirements of Section  13(a) or 15(d), as
applicable, of the Securities Exchange  Act of 1934 and that the  information contained  in the Report
fairly presents, in all material respects, the  financial condition and  results of  operations of  the
Company.

By: /s/ PAUL J. BRODY

Name: Paul J. Brody
Title: Chief Financial Officer, Treasurer and

Secretary

Date: February 28, 2018

The foregoing certification is being furnished solely pursuant to 18 U.S.C. §  1350 and is not being filed
as part of the Report or as a separate  disclosure document.

CORPORATE INFORMATION 
CORPORATE INFORMATION 

Corporate Headquarters  
One Pickwick Plaza, Greenwich, CT 06830  

(877) 442-2757

Independent Registered Public 
Accounting Firm  
Deloitte & Touche LLP

Common Stock 
Our stock is listed on the NASDAQ Global  

Select Market under the symbol “IBKR”

Corporate Website  
www.ibkr.com

Media 
media@ibkr.com  

(203) 913-1369

Investor Relations  
investor-relations@ibkr.com  

(203) 618-4070

Officers and Directors

Thomas Peterffy 
Chairman of the Board of Directors and  
Chief Executive Officer

Earl H. Nemser   
Vice Chairman and Director

Milan Galik 
President and Director

Thomas A. Frank 
Executive Vice President and  
Chief Information Officer

Paul J. Brody 
Chief Financial Officer, Treasurer,  
Secretary and Director

Lawrence E. Harris 
Lead Independent Director

Richard Gates 
Director 

Gary Katz  
Director 

Wayne H. Wagner 
Director

ORGANIZATIONAL STRUCTURE
ORGANIZATIONAL STRUCTURE

Public Stockholders

100% economic interest 
17.4% voting interest

Interactive Brokers 
Group, Inc.

Members of 
IBG Holdings LLC

82.6% voting interest

IBG Holdings LLC

17.4% economic interest

82.6% economic interest

IBG LLC

Operating Subsidiaries of IBG LLC

819480.indd   15

2/21/18   3:39 PM

INTERACTIVE BROKERS GROUP 
SALES OFFICE LOCATIONS

Mumbai, India
Mumbai, India

91-22-61289-836

Hong Kong
Hong Kong

852-3410-7500

Tokyo, Japan
Tokyo, Japan

81-3-4588-9707

Sydney, Australia
Sydney, Australia

61-2-8093-7301

Greenwich, CT
Greenwich, CT

Chicago, IL
Chicago, IL

San Francisco, CA
San Francisco, CA

West Palm Beach, FL
West Palm Beach, FL

855-861-6414

Montreal, Canada 
Montreal, Canada 

877-745-4222

London, United Kingdom
London, United Kingdom

44-207-710-5680

Zug, Switzerland
Zug, Switzerland

41-41-726-96-89

www.ibkr.com
www.ibkr.com

819480.indd   16

2/21/18   3:40 PM