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Interactive Brokers Group

ibkr · NASDAQ Financial Services
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Ticker ibkr
Exchange NASDAQ
Sector Financial Services
Industry Investment - Banking & Investment Services
Employees 501-1000
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FY2016 Annual Report · Interactive Brokers Group
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Interactive Brokers
2016 Annual Report

Interactive Brokers continues to 
grow at a record pace.

Equity capital

Accounts

2012

$4.8
 Billion

2016

$5.8
 Billion

210,000
In over 170 countries

385,000
In over 200 countries

Daily average revenue trades

413,000

660,000

Client equity

$33
 Billion

$85
 Billion

We off er 
state-of-the-art 
technology and access 
to international markets 
at industry-low 
prices.

Interactive Brokers’ low commissions and fi nancing 
costs, plus high execution quality, help our customers 
minimize their costs and maximize their returns.

U.S. Margin Rates Comparison1

Commission Rates Comparison1

$25K

$300K

$1.5M

$3.5M

Equity 
Trades

Option 
Trades

  Interactive Brokers2

2.07%

1.74%

1.44%

1.19%

$2.26

  E-Trade

8.75%

7.25%

5.75%

5.75%

$6.95

  Fidelity

7.825%

6.575%

4.00%

4.00%

$4.95

  Scottrade

7.75%

6.50%

5.50%

5.50%

$7.00

  Schwab

8.00%

6.75%

6.25%

6.00%

$4.95

  TD Ameritrade

8.75%

7.25%

6.50%

6.50%

$6.95

     $0.00 base
 $0.70 per contract

$6.95 base
+ $0.75 per contract

$4.95 base
+ $0.65 per contract

$7.00 base
+ $0.70 per contract

$4.95 base
+ $0.65 per contract

$6.95 base
+ $0.75 per contract

  Vanguard

7.25%

6.00%

5.25%

5.25%

$7-$20
depends on 
the number of 
trades

$7.00 base
+ $1.00 per contract

Futures 
Trades

$1.74

exchange & 
regulatory fees plus 
$2.99

N/A

N/A

N/A

exchange & 
regulatory fees plus 
$2.25

N/A

Interactive Brokers has lower commission rates for larger volumes and comparable rates worldwide. Lower investment costs will increase your overall return on 
investment, but lower costs do not guarantee that your investment will be profi table.

Execution Price Improvement Comparison*

U.S. Stocks
(per 100 shares)

U.S. Options
(per contract)

European 
Stocks
(per 100 shares)

  Interactive Brokers

$0.38

$0.84

€0.08

  Industry

$0.32

$0.60

- €0.84

  IB Advantage

$0.06

$0.24

€0.93

* 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 signifi cantly better than the industry’s during the second half of 2016.

In 2016, 

Barron’s named 

Interactive Brokers

 the low-cost 

broker for the 15th 
consecutive year.3

1.   Rates were obtained on March 2, 2017 from each fi rm’s website, and are subject to change without notice. The IB equity and futures commission rates shown 

are the average of the client commissions for trades executed in January 2017 and are subject to minimums and maximums as shown on the IB website. Some 
of the fi rms listed may have additional fees and some fi rms may reduce or waive commissions or fees, depending on account activity or total account value. 
Services vary by fi rm. 

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 Options” and the CFTC Futures Trading Risk Disclosure at ibkr.com/disclosures before trading these products.

3.  Low Cost Rated by Barron’s 15 Years Straight - 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

Access the World
One Account, One Screen
State-of-the-art technology gives our customers access to a wide 
array of products in both domestic and international markets.

Enter low-cost 
orders 24 hours a 
day on over 100 
market centers in 
24 countries and 
22 currencies.

Try our platform 
commitment free
Go To ibkr.com/freedemo

PortfolioAnalyst

Our easy-to-use online performance analysis 
and reporting tool for your accounts both 
at and outside of IB.

Access all your accounts in one place

 ■ See all your accounts – investments, checking, savings, annuity, 

incentive plan and credit card accounts - held at IB or at 

other fi nancial institutions. 

 ■ Analyze your current and prior balances, percentage returns, 

and changes in value. 

 ■ Review asset classes, positions and trades either by 

fi nancial account or across all your accounts. 

Analyze your portfolio performance 
quickly and effi  ciently

 ■ Use charts to illustrate portfolio return contribution by asset class, and 

heat maps for sector as well as individual stock performance.

 ■ Select from a variety of global benchmarks, or customize your own 

benchmark, and track your performance across time periods. 

 ■ Determine how your asset allocation and investments aff ect your performance. 

 ■ Create custom reports.

Solutions for
Financial Advisors

Financial advisors are increasingly 
opting for independence. Greenwich 
Advisor Compliance Services can help.

Greenwich Compliance

Greenwich Compliance is a new resource 
for experienced investors and traders who 
are looking to take the next step and start 
their own investment advisor fi rms.  

Greenwich Compliance

With extensive regulatory and industry experience, Greenwich Compliance professionals 

can help advisors with their registration and compliance needs. They will take an active 

role, at a reasonable cost, in helping fi rms navigate the registration process. For advisors 

using the IB trading platform, Greenwich Compliance will provide answers to day-to-day 

Greenwich Compliance

compliance questions, without cost.

Greenwich Compliance 
also off ers:

RIA Compliance Center: Investment advisors 

are subject to a variety of compliance 

obligations. We built the Compliance Center to 

make it as seamless as possible for our advisors 

to meet their obligations.

IB Investors’ Marketplace: Advisors on our 

platform can advertise their services to all IB 

clients in IB’s Investors’ Marketplace. Advisors 

can attract capital to manage and IB clients 

can fi nd advisors to manage all or part 

of their investments.

Customer Relationship Management: 

Advisors can keep track of their leads and 

clients in our free Customer Relationship 

Management tool, which is fully integrated into 

our Account Management system.

Unique tools and 
technology designed 
to make fi nancial 
advisors and 
broker-dealers on 
our platform more 
effi  cient.

We off er turnkey 
solutions for trading, 
clearing, reporting 
and billing.

 ■ Sophisticated client order management.

 ■ Compliance support.

 ■ White label.

 ■ Advanced real-time client risk management.

 ■ Performance analysis.

 ■ Access to global markets.

 ■ Transparent, low commissions.

 ■ Low fi nancing rates.

 ■ Best executions.

We provide the tools and 
technology that institutions 
and sophisticated investors 
need to minimize their costs 
and maximize their returns1.

Superior trading 
and risk management 
technology

Low cost

Best execution

Global market 
access

1.  Lower investment costs will increase your 
overall return on investment, but do not 
guarantee that your investment will be 
profi table.

Award Winning Technology From a 
Recognized Industry Leader

Our multiple trading platforms,  
advanced trading tools, algos and 
sophisticated order types continue to 
earn awards, year after year.

Interactive Brokers earned an 
overall rating of 4.5 in 20161.

2017 Winner 
“Best Broker-Dealer Futures”.

2017 Winner 
“Best Broker-Dealer Options”.

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

2016 Winner
“Best Prime Broker - Start-ups”.

2017 Winner
“Best FCM - Technology”.

Industry-Leading Growth

Client Accounts
(thousands)

Client Equity
(billions)

16% Growth* 

27% Growth*

Total Client DARTs
(thousands)

12% Growth*

385

331

281

239

210

$45.7

$32.9

$85.5

647

660

$67.4

$56.7

566

486

413

2012

2013

2014

2015

2016

2012

2013

2014

2015

2016

2012

2013

2014

2015

2016

* Four-year compound annual growth rate

Financial Strength

Liquid Balance Sheet
99% of our balance sheet comprised of liquid assets

Liquid Assets

Total Assets

S
N
O

I

L

L

I

B

$60

$50

$40

$30

$20

$10

$0

2012

2013

2014

2015

2016

Low Financial 
Leverage

$5.8B of equity.

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

No long-term debt.

S
N
O

I

L

L

I

B

Equity

$6.0

$5.8

$5.6

$5.4

$5.2

$5.0

$4.8

$4.6

$4.4

$4.2

$4.0

2012

2013

2014

2015

2016

Dear Fellow Shareholders:

In 2016 our relentless advance to attract more individual investors, hedge funds, 
fi nancial advisors and introducing brokers to our platform continued unabated – in 
fact, at a slightly higher rate of growth than the year before. The total number of 
accounts managed on our platform increased by 16%. The total amount of assets under 
management was up by 27%.

What does 2017 look like?
With the increasing momentum we are experiencing, there is every reason to believe 
that our growth rate in 2017 can exceed last year’s. Nevertheless, our business is 
subject to an all important factor, and that is our client’s sense of well-being. Regardless 
of where our clients reside in the various geographic areas we serve, their confi dence 
in both the local, regional or global political and economic landscape drives their level 
of economic activity.

Up until this year, these political and economic trends, whether constructive or retardant to investment activity, were, at least, 
fairly predictable. For example, over the last decade, many of the former Communist countries, by varying means, have been 
moving towards free markets with their citizens enjoying greater economic freedom in their lives. This trend translated into 
considerable increases in investing activity in these countries. Meanwhile, Westerners, in recent years, have demonstrated 
lower levels of confi dence in their governments and their economies with the attendant suppression of investment activity 
relative to potential.

This lack of confi dence has been justifi ed as EU and US bureaucrats tied their countries’ economies in knots with millions 
of pages of regulations, driving towards a Western version of a centrally governed economy, while the East was loosening 
the ropes.

The sweeping Republican victory in the US and Brexit will bring a sudden jolt to these trends. New leadership will try to 
bring quickening economic activity by simplifying and reducing taxes, removing stifl ing regulations and reawakening the 
entrepreneurial spirit – provided that society is not overwhelmed by a widening political divide. This uncertainty will prevail 
until President Trump and the world fi gure each other out and come to an understanding of what to expect from one another.

While people may say things they do not really believe to sound enlightened or sophisticated, they will not buy stocks unless 
they truly expect a favorable economic environment. Based on market prices at the end of February, we must conclude that 
the majority of investors expect that one way or another, the Republican agenda will be implemented. The historically nearly 
all-time low volatility priced into the options markets provides further proof that this expectation is widespread and stable.

We have no reason to disagree with this forecast.

With a positive view to the future, we have enhanced our software development and customer service capabilities, embarking 
on new projects, and strengthening our presence and workforce around the world.

Put together, we look forward to this coming year with enthusiasm and solid plans, confi dent that 2017 will be the best year 
ever for our brokerage business.

Sincerely,
Sincerely,

Thomas Peterff y
Chairman, Chief Executive Offi  cer

Interactive  Brokers  Group,  Inc.  

2016  

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, 2016

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:2) No (cid:3)

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:3) No (cid:2)

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:2) No (cid:3)

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:3)

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:2) No (cid:3)

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

Smaller reporting  company  (cid:3)

Accelerated filer  (cid:3)

Non-accelerated filer (cid:3)
(Do not check if a
smaller reporting company)

Indicate by check mark whether the registrant is a shell  company  (as  defined  in Rule  12b-2  of the Exchange
Act). Yes (cid:3) No (cid:2)

The aggregate market value of  the voting and  non-voting  common  equity  stock  held by non-affiliates of  the  registrant
was approximately $2,292,096,015  computed  by  reference  to  the  $35.40 closing sale  price of the  common  stock on  the
NASDAQ Global Select Market,  on  June  30,  2016, the  last business  day  of the  registrant’s  most recently completed
second fiscal quarter.

As of February 24, 2017, there were  67,984,973 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  2017 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, 2016

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
24
36
36
36
38

39
43

45
76
82

128
128
132

132
132

132
132
132

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

SIGNATURES

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

133

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

136

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:129) general economic conditions in the  markets where we  operate;

(cid:129) increased industry competition and downward  pressures  on bid/offer  spreads and electronic

brokerage commissions;

(cid:129) risks inherent to the electronic market  making and brokerage businesses;

(cid:129) implied versus actual price volatility levels of the  products in  which we  make  markets;

(cid:129) the general level of interest rates;

(cid:129) failure to protect or enforce our intellectual property rights in our proprietary  technology;

(cid:129) our ability to keep up with rapid technological change;

(cid:129) system failures and disruptions;

(cid:129) non-performance of third-party vendors;

(cid:129) conflicts of interest and other risks  due to our ownership and holding company structure;

(cid:129) the loss of key executives and failure to recruit  and  retain qualified  personnel;

(cid:129) the risks associated with the expansion  of our business;

(cid:129) our possible inability to integrate any businesses we acquire;

(cid:129) compliance with laws and regulations, including those  relating to the  securities industry;  and

(cid:129) 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. 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, England, Switzerland, Liechtenstein, India, China
(Hong Kong and Shanghai), Japan and  Australia.  As of  December 31,  2016 we  had 1,204 employees
worldwide.

IBG, Inc. is a holding company and our  primary  assets are our  ownership  of  approximately  16.6% 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 26  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 three
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:

(cid:129) 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
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

2

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:129) As a market maker, we provide continuous bid and  offer  quotations  on  over one million

securities and futures products listed on 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.  Unlike firms that trade over-the-counter (‘‘OTC’’)
derivative products, our business creates liquidity and  transparency on electronic  exchanges. 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,  its  significance continues to
diminish.

Our electronic brokerage and market  making businesses are  complementary. Both benefit from our
combined scale and volume, as well as from our proprietary  technology.  Our brokerage  customers
benefit from the technology and market  structure  expertise developed in  our market making  business.
The expense of developing and maintaining our unique  technology, clearing, settlement, banking and
regulatory structure required by any specific exchange or market  center is  shared  by  both of our
businesses. These economies, in turn,  enable  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 in one or both  of  our businesses or  who operate
only in a  subset of the exchanges and  market  centers  on which we operate.  Our trading system contains
unique  architectural aspects that, together with  our  massive trading volume in markets worldwide, may
impose a significant barrier to entry for  firms wishing to compete  in our specific  businesses and permit
us to compete favorably against our competitors.  In addition, many of  our  regulatory and compliance
functions have been built into our integrated market making, order routing  and custodial  systems.

Our internet address is www.interactivebrokers.com and the investor relations section of  our web site is
located at www.interactivebrokers.com/ir.  We make available free of charge, on or  through the investor
relations section of our web site, 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 web  site
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 web site  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 web site 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.

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.

3

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:129) 100.0% owner of IBG Class A common stock
Approximately 16.6%  voting interest in IBG 
(cid:129)
(cid:129) Approximately 100% economic interest in IBG

(cid:129) Controlled by Thomas Peterffy, as the sole voting

member and sole managing member

(cid:129) Mr. Peterffy and his affiliates own approximately

89.1% of the membership interests

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

(cid:129) Sole managing member
(cid:129) Approximately 16.6% 

of membership interests

IBG Holdings LLC

(cid:129) 100% owner of Class B common stock
(representing approximately 83.4% 
voting interest in IBG)1

(cid:129) Approximately 83.4%

of membership interests

IBG LLC

Operating Subsidiaries of IBG LLC

21FEB201719343531

(1) In connection with redemption transactions in 2016, as  of December  31, 2016, IBG Holdings LLC

held for sale for the benefit of certain  of  its  members  1,050,000 shares of IBG  Class  A common
stock, representing an additional 0.26% of the  voting interests in  IBG. See ‘‘Use of Proceeds from
Member Redemption’’ in Part II Item 5 of this Annual Report on Form 10-K.

Prior to the IPO, we had historically conducted our business through a limited  liability  company
structure. Our primary assets are our ownership of approximately 16.6% 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  83.4% 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,

4

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. The below table shows the amount of IBG LLC
membership interests held by IBG, Inc. and Holdings as of December 31, 2016.

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

16.6%

83.4%

100.0%

67,989,967

341,444,304

409,434,271

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, the  Company filed a ‘‘shelf’’  Registration
Statement on Form S-3 (File Number  333-176053) 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 2011, the Company issued  1,983,624 shares  of  common stock
(with a fair value of $29 million) to Holdings in exchange for an  equivalent number of shares  of
member interests in IBG LLC.

On November 12, 2013, the Company  filed  a ‘‘shelf’’ Registration  Statement on  Form S-3 (File
Number 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  this  shelf registration
statement, from 2013 through 2016, the Company issued 10,659,871 shares of common stock  (with  a
fair value of $333 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)

Year Ended December 31,

2016

2015

2014

(in millions)
$1,097
561

$1,239
483

$ 952
363

Income before income taxes

$ 756

$ 536

$ 589

Pre-tax profit margin

61%

49%

62%

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

Non-interest expenses

$ 190
146

$ 298
168

$ 284
170

Income before income taxes

$

44

$ 130

$ 114

Pre-tax profit margin

23%

44%

40%

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

Non-interest expenses

$ (33) $ (206) $ (193)
4

2

6

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net revenues

Non-interest expenses

$1,396
635

$1,189
731

$1,043
537

Loss before income taxes

$ (39) $ (208) $ (197)

Income before income taxes

$ 761

$ 458

$ 506

Pre-tax profit margin

55%

39%

49%

(1) Electronic brokerage non-interest  expenses  includes 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.

Financial information concerning our  business  segments for each of 2016,  2015, and  2014 is  set forth in
‘‘Management’s Discussion and Analysis of Financial  Condition and Results  of  Operations—Electronic
Brokerage,’’ and the 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 87% of net revenues and 94% of income before income taxes from
electronic brokerage and market making combined during  2016. 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,  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.

6

Since launching this business in 1993, we have grown to approximately 385  thousand  institutional and
individual brokerage customers. We provide our customers  with what we  believe to be one of the  most
effective and  efficient electronic brokerage platforms in the  industry.  The  following  are key highlights
of our electronic brokerage business:

(cid:129) 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  2016,
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 0.5 basis points of
trade money, as measured against a daily  volume-weighted average price (‘‘VWAP’’) benchmark.

(cid:129) 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:129) 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 24  countries around the world seamlessly.

(cid:129) 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:129) 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:129) 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:129) Probability Lab(cid:4) (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:129) 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:129) 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:129) 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:129) 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:129) 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:129) 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:129) 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:129) Greenwich Compliance—Greenwich Advisor Compliance Services 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:129) Covestor—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 / return preferences, and
members of matching groups are electronically introduced to each other. Retail investors can
assign their accounts to be traded by one or more advisors. Covestor 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.

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% of  our
commissions and execution fees in 2016.

Market Making—Timber Hill

Market making represented 13% of net  revenues and 6% of income before income taxes from
electronic brokerage and market making combined during 2016. We conduct our market making
business primarily through our Timber  Hill (‘‘TH’’) subsidiaries. As a market maker on many of the
world’s  leading electronic exchanges, we provide liquidity by offering competitively tight bid/offer
spreads over a broad base of over one million 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 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 to be profitable  in both  up-market and down-market scenarios. Our quotes are
based on our proprietary model rather than  customer order flow, and we  believe that this approach
provides us with a competitive advantage.

9

We  are a market leader in exchange-traded equity  options  and equity-index options and futures.
Together with our electronic brokerage  customers, in  2016 we accounted for approximately  7.9% of
exchange-listed equity options traded worldwide  according to data received from exchanges worldwide.
Our ability to make markets in such a  large number of exchanges and  market  centers  simultaneously
around the world is one of our core  strengths and has contributed  to  the large volumes in our market
making business. We engage in market  making operations in  North America, Europe  and in the
Asia/Pacific regions as described below.

North American Market Making Activities. Our U.S. market making activities are conducted through
Timber Hill LLC (‘‘TH LLC’’), a SEC-registered securities broker-dealer that conducts market making
in equity derivative products, equity index derivative  products and equity securities. Since  its  inception
in 1982, TH LLC has grown to become  one of  the largest listed options market makers in the U.S. As
of December 31, 2016, TH LLC held  specialist, primary market maker or lead market maker
designations in options on approximately  940 underlying securities listed in  the U.S.  TH LLC is  a
member of the BOX Options Exchange  LLC, BATS BZX Exchange, Inc., Chicago  Board Options
Exchange, Inc., Chicago Mercantile Exchange, Chicago Board of Trade, New York Mercantile
Exchange, COMEX, International Securities  Exchange, NYSE  AMEX Options Exchange, NYSE  Arca
Options Exchange, NYSE MKT LLC, OneChicago LLC, The NASDAQ Stock Market LLC,
NASDAQ BX, Inc. and NASDAQ PHLX  LLC. TH LLC also conducts  market making activities in
Mexico at Bolsa Mexicana de Valores (BMV) and MexDer, a derivatives subsidiary  of BMV. We
conduct market making activities in Canada through  our  Canadian  subsidiary, Timber Hill Canada
Company (‘‘THC’’) at the Toronto Stock Exchange  and Canadian  Derivatives Exchange  Bourse de
Montreal Inc. In addition, we participate  in stock trading at  various  notable Electronic  Communications
Networks (‘‘ECNs’’) in both the U.S. and  Canada.

European, Asian and Australian Market Making Activities. Our European, Asian, and Australian market
making subsidiaries, the largest of which is Timber Hill Europe AG (‘‘THE’’), conduct  operations  in
19 countries, comprising the major securities  markets in these  regions.

We  began our market making operations  in  Europe in 1990. In Germany and  Switzerland,  we have
been among the largest equity options market makers in terms  of volume  on Eurex,  one  of the world’s
largest futures and options exchanges,  which is  wholly owned by  Deutsche B¨orse AG. We have also
been active in trading German stocks  and  warrants as a  member of XETRA, the German electronic
stock trading system, and the Frankfurt  and Stuttgart  stock exchanges;  and in Switzerland as a member
of the SIX Swiss Exchange. Our other European operations are conducted on the  London Stock
Exchange; the Weiner B¨orse AG; the Euronext exchanges in  Amsterdam, Paris, Brussels and London;
NASDAQ OMX Nordic exchanges in  Sweden, Finland and Denmark; the MEFF  and Bolsa  de Valores
Madrid in Spain; the IDEM and Borsa Italiana S.p.A. in Milan.

Since 1995, we have conducted market  making operations  in Hong Kong. Our Hong  Kong subsidiary,
Interactive Brokers Hong Kong Limited (formerly Timber Hill Securities  Hong Kong  Ltd), is a member
of the cash and derivatives markets of the  Hong  Kong  Exchanges. Since 1997,  we have  conducted
operations in Australia. Our Australian subsidiary, Timber Hill Australia Pty Ltd  (‘‘THA’’), is  a member
of the Australian Securities Exchange, and routes orders for its trading on ASX 24 through its affiliate,
Interactive Brokers LLC (‘‘IB LLC’’). We  commenced  trading in Japan in  2002, Singapore  in 2004 and
Taiwan in 2007. In 2008, we began our market making operation and, subsequently, brokerage activities
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.

10

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. High  frequency  traders  (‘‘HFTs’’)
and others who compete with us but do  not regularly provide liquidity have put our market making
operations under pressure and, along with the rapid increase in our  electronic brokerage  business,  the
relative significance of market making to our business has diminished.

Technology

Our proprietary technology is the key  to  our success. We built our business on the belief that a fully
computerized market making system  that could integrate pricing  and risk exposure information  quickly
and continuously would enable us to  make markets profitably in many different financial instruments
simultaneously. 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, these features reduce overall  transaction  costs to our customers and,  in turn,
increases our transaction volume and profits. Over the  past  39 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.

The quotes that we provide as market makers are driven  by proprietary mathematical models  that
assimilate market data and re-evaluate our outstanding quotes many times per second. Because our
technology infrastructure enables us to process  large volumes of pricing and risk exposure information
rapidly, we are able to make markets  profitably in  securities with relatively low  spreads between bid
and offer prices. As market makers, we  must ensure that our interfaces connect effectively  and
efficiently with each exchange and market center where we make markets and that they  are in
complete conformity with all the applicable rules of each local venue. Utilizing up-to-date computer
and telecommunications systems, we  transmit continually updated pricing  information directly  to
exchange computer devices and receive trade and quote information  for  immediate  processing  by  our
systems. As a result, we are able to maintain more effective control over  our exposure to price and
volatility movements on a real-time basis  than  many  of our  competitors. This control is important, not
only because our system must process,  clear and settle a  few hundred  thousand  market maker trades
per  day with a minimal number of errors,  but also  because the system monitors  and manages  the risk
on the entire portfolio, which generally consists of more than  five  million  open contracts distributed
among many hundreds of thousands  of  different products. Using  our system, which we believe affords
an optimal interplay of decentralized  trading activity and centralized  risk  management, we quote
markets in over one million securities  and futures products traded around the  world.

In our electronic brokerage business, 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.
Additionally, our customers benefit from  real-time  systems optimization for our market making
business. 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 24 countries around  the world. All
of these  exchanges are 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.

11

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, IB employs proprietary technology to  automate,  or otherwise  facilitate,  many of
the following functions:

(cid:129) account opening process;

(cid:129) order routing and best execution;

(cid:129) seamless trading across all types of  securities and currencies around the world from one  account;

(cid:129) order types and analytical tools offered  to  customers;

(cid:129) delivery of customer information, such as confirmations, customizable  real-time account

statements and audit trails;

(cid:129) customer service; and

(cid:129) 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 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
successful market making and ensuring  best executions for brokerage  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

12

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.

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 39 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, Singapore  dollar,
Norwegian krone, and Danish krone. We currently transact business and are  required to manage
balances in each of these 15 currencies.  The currencies comprising the GLOBAL and their relative
proportions can change over time. For example, as a  result of  periodic assessments, we amended  the
composition of the GLOBAL in mid-2016  by adding the Chinese renminbi (specifically, the offshore
currency known by the symbol (CNH)),  and  removing  the South Korean won and Brazilian real. These
changes went into effect at the close  of business on June 30,  2016. 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.

13

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.

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.

We  trade primarily the options on stocks  (and  individual stocks) whose underlying equity market
capitalization is greater than $500 million.  Throughout the trading day  we produce online, real-time
profit and loss, risk evaluation, activity and other  management reports. Our systems  compile a daily
balance sheet and income statements for  our accounting  department  to  review and  to  reconcile  to  our
trading system results and data from  external sources.

The adaptability of our portfolio risk management  system and our  trading  methods allow us to trade a
large number of financial instruments  across many  markets  using  the same risk management  system
and similar trading methods.

Operational Controls

We  have automated the full cycle of controls  surrounding the  market  making and brokerage businesses.
Key automated controls include the following:

(cid:129) Our technical operations section continuously monitors our  network and the  proper functioning
of each of our nodes (exchanges, internet service providers  (‘‘ISPs’’), leased customer lines and
our  own data centers) around the world.

14

(cid:129) Our real-time credit manager software provides pre and post-execution controls by:

(cid:129) 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:129) 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 account  equity.

(cid:129) Our market making system continuously evaluates over  one  million  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 innovation, thereby allowing us to achieve  real-time controls over market exposure.

(cid:129) 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.

(cid:129) 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:129) 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 market making software
generates and disseminates to exchanges and market centers continuous bid  and offer quotes on over
one million tradable, exchange-listed  products. 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.

At the moment a trade is executed, our systems  capture and  deliver this information back to the
source, either the market making system  or via the  brokerage system  to  the customer,  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

15

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  full 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.

Due to our large positions in broad based  index  products,  we benefit from the cross-margin  system
maintained by OCC and CMECH. For example, if  we hold  a  position in an OCC cleared product  and
have an offsetting position in a CMECH cleared  product, the cross-margin computation takes both
positions into account, thereby reducing  the overall margin requirement. The  reduced  margin benefit
proves especially useful during times of  market  stress,  such as  on days with large price  movements
when intra-day margin calls may be reduced or  eliminated by the cross-margin calculation.

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

Customers

We  established our electronic brokerage  subsidiary, 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 16 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 385  thousand cleared customer accounts. Our  customers  reside in
over 190 countries 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, financial advisors who are
comfortable with technology, banks that  require global  access, and hedge  funds.

Our customers fall into three groups  based on services provided: cleared customers,  trade execution
customers and wholesale 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. Many prime brokers  once
offered increased leverage over Regulation T credit limitations and NYSE  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:129) 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.

16

(cid:129) 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.

(cid:129) Wholesale Customers: Our wholesale customers, which include banks and retail  electronic

brokers, are generally self-clearing. These customers count on us for our superior  options and
option/stock combination trade routing and  execution and  our  ability to assist them  in satisfying
their regulatory requirements to provide best  execution to their  customers.

Our non-cleared customers include online  brokers and increasing numbers of the  customer trading
units of U.S., Canadian and European  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, 2016, we had 1,204  employees, of which 1,193 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.

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 offerings targeted to professional  traders by large  retail online brokers
(such as TD Ameritrade’s thinkorswim, E*TRADE’s  Pro business, and The Charles  Schwab
Corporation’s StreetSmart Edge and optionsXpress businesses) and the  prime brokerage  and electronic
brokerage arms of major commercial and investment banks and brokers  (such  as Goldman Sachs
Electronic Trading (GSET), Morgan  Stanley  Electronic Trading (MSET), and JP Morgan Securities).
We  also encounter competition to a  lesser extent from  full commission brokerage firms, including  Bank
of America Merrill Lynch and Morgan Stanley Smith Barney, 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 and many impose
significant account equity minimums,  which we do not. We provide access to a global  range of products
from a single IB Universal AccountSM and  professional level executions and pricing, which positions us
in competition with niche direct-access  providers and prime brokers. In  addition to offering low
commissions and financing rates, we provide  sophisticated  order types and analytical tools that give a
competitive edge to our customers.

17

Market Making

Historically, competition has come from registered  market making firms which  range from sole
proprietors with very limited resources  to  large integrated  broker-dealers. Today, our  major competitors
continue to be large broker-dealers, such as Goldman  Sachs,  Morgan Stanley, Citigroup, Barclays, and
niche players such as Citadel, Susquehanna, Wolverine Trading, Group One Trading, IMC, and  Optiver.
Some of our competitors in market making are larger  than we are and have  captive order flow  or
purchase order flow.

The competitive environment for market makers  has evolved considerably in  the past several years,
most notably with  the rise in 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  is currently an area  of focus amongst regulators who
are examining the practices of HFTs and their impact on market structure.

To compete successfully, we believe that  we must have more sophisticated,  versatile and robust  software
than our competitors. This is our primary  focus, as contrasted with many  of  our  competitors. With
respect to these competitors, we maintain the advantage of having had much longer  experience  with the
development and usage of proprietary electronic brokerage and market making systems. Market
conditions that are difficult for other  market  participants  often present us with the  opportunities
inherent in diminished competition. Our  advantage is  our expertise and decades  of single-minded focus
on developing our technology. This enables us to have a  unique  platform specializing strictly  in
electronic brokerage and market making.

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 registered U.S. broker-dealers, IB LLC and 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 and TH  LLC are subject to the Commodity Exchange Act and
rules promulgated by the Commodity Futures  Trading Commission  (‘‘CFTC’’) and the various
commodity exchanges of which they are members. We are also subject  to  the requirements  of various
self-regulatory organizations such as  the  Financial Industry Regulatory Authority (‘‘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:129) sales methods;

(cid:129) trade practices;

(cid:129) use and safekeeping of customers’ funds  and  securities;

(cid:129) capital structure;

18

(cid:129) risk management;

(cid:129) record-keeping;

(cid:129) financing of customers’ purchases;  and

(cid:129) 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. The
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, 2016, aggregate  excess regulatory capital for all of the  operating companies  was
$4.2 billion.

IB LLC and TH LLC are subject to the  Uniform Net Capital  Rule (Rule 15c3-1) under the Exchange
Act and 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; THA and Interactive Brokers
Australia Pty Limited (‘‘IBA’’) are subject  to the Australian  Securities Exchange liquid capital
requirement;  Timber Hill (Lichtenstein) AG is  subject to the Financial Market  Authority  Liechtenstein
eligible capital requirements; THC and Interactive Brokers Canada  Inc. (‘‘IBC’’) are subject  to  the

19

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; 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

$3,254
306
577
659

$4,796

(in millions)
$294
1
174
96

$565

$2,960
305
403
563

$4,231

As of December 31, 2016, all of the operating  companies were  in compliance with their  respective
regulatory capital requirements. For  additional information regarding  our  net capital requirements see
Note 15 to the 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.

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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.  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  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.

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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; THA,  registered to do  business  in Australia  as a securities dealer
and futures broker; 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, both
THA and IBA are 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 . . . . . . . . . . . . . . . . . . . . . . .

72 Chairman of the Board of Directors and Chief

Earl H. Nemser . . . . . . . . . . . . . . . . . . . . . . .
Milan Galik . . . . . . . . . . . . . . . . . . . . . . . . . .
Paul J. Brody . . . . . . . . . . . . . . . . . . . . . . . . .

70 Vice Chairman and Director
President and Director
50
56 Chief Financial Officer, Treasurer, Secretary

Executive Officer

and Director

Thomas A. Frank . . . . . . . . . . . . . . . . . . . . . .

61 Executive Vice President and Chief

Lawrence E. Harris . . . . . . . . . . . . . . . . . . . .
Hans R. Stoll . . . . . . . . . . . . . . . . . . . . . . . . .
Wayne Wagner . . . . . . . . . . . . . . . . . . . . . . . .
Richard Gates . . . . . . . . . . . . . . . . . . . . . . . .
Gary Katz . . . . . . . . . . . . . . . . . . . . . . . . . . .

60 Director
77 Director—Retired 12/31/2016
78 Director
45 Director
56 Director—Effective 1/4/2017

Information Officer

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.

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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.

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.

Hans R. Stoll—Dr. Stoll is The Anne Marie and Thomas B. Walker, Jr., Professor  of Finance, Emeritus
at the Owen Graduate School of Management, Vanderbilt  University  and founder of the Financial
Markets Research Center. Dr. Stoll has published several  books and more than 60 articles  on numerous
securities and finance related subjects. He is known  for  developing  the put  call parity relation and for
his work in market microstructure. Dr.  Stoll was  on the faculty of the Wharton School from 1966 to
1980, at which time he joined the faculty at Vanderbilt. Dr. Stoll served as a member of  the board  of
directors of The Options Clearing Corporation from 2005 to 2008 and he  has been  president of the
American Finance Association. Dr. Stoll received  his A.B. degree from Swarthmore College in  1961
and his M.B.A. and Ph.D. degrees from the Graduate School  of  Business of  the University  of Chicago
in 1963 and 1966,  respectively.

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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.

Richard Gates—Mr. Gates co-founded TFS Capital in  1997. TFS is an independent advisory firm that
has been dedicated to the construction  of  quantitative models that  are  designed to identify market
inefficiencies. As a portfolio manager at  this firm, he oversees several hedge  funds and  mutual funds
that take both long and short positions  in  equities  and futures. At TFS, his focus  is on  trade execution,
factor research and business development. Mr. Gates graduated from the  University of  Virginia in  1994
with a bachelor’s degree in Chemical  Engineering.

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.

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 89.1% of the economic interests and all of  the  voting interests in  Holdings, which
owns all of our Class B common stock, representing approximately 83.4% 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

24

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.

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 16.6% 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

25

foreign tax credits  and the rules relating  to  the amortization of intangible  assets, for example. Based on
facts and assumptions as of December  31,  2016, 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
$8.3 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.

The tax basis of $8.3 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, 2016.  In  order  to  have an $8.3  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 $23.73.

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 68 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 341 million shares of common stock. It  is
possible, however, that such shares could  be issued in  one or a few  large transactions.

26

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.

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.

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 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, and to fluctuations in trading  levels. 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.

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.

27

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.

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

A substantial 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:129) price changes in securities;

(cid:129) lack of liquidity in securities in which we have positions;  and

(cid:129) 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.

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.

28

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.

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

29

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 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.  In December 2010  and December 2012,
special cash dividends were paid to holders of our common stock.  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.

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

30

requirements of these different regulatory  jurisdictions, which are often  unclear, may limit our ability to
continue existing international operations  and  further expand internationally.

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.

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 are exposed to risks associated with  our international  operations.

During  2016, approximately 25% 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.

31

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
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.

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.

32

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:129) 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:129) direct  market access and online options  and  futures firms;

(cid:129) direct  market access and online equity brokers;

(cid:129) software development firms and vendors who  create global  trading  networks and analytical tools

and make them available to brokers; and

(cid:129) 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 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 Part I,  Item 3, ‘‘Legal
Proceedings and Regulatory Matters.’’

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  no material

33

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.

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
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, but  instances
of unauthorized access of customer accounts have been increasing recently  on an industry-wide basis.
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.

34

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.

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:129) rapid technological change;

(cid:129) changing customer demands;

(cid:129) the need to enhance existing services and products or introduce  new services and products; and

(cid:129) 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.

Market making in forex-based products  entails significant  risk, and  unforeseen  events in such business  could
have an adverse effect on our business,  financial condition  and results  of operations.

Our activities in market making for forex-based products include  the trading of cash in foreign
currencies with banks and exchange-listed futures, options  on futures, options on  cash deposits and
currency-based ETFs. All of the risks that pertain to our market making  activities in  equity-based
products also apply to our forex-based  market  making. In addition,  we  have  comparatively less
experience in the forex markets and  various unexpected events  can  occur that may  result in great
financial loss.

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.

35

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

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

Space (sq. feet)

Expiration

Principal Usage

Greenwich, CT . . . . . . . . . . . . . . . . . . . . . .
Greenwich, CT . . . . . . . . . . . . . . . . . . . . . .
Jersey City, NJ . . . . . . . . . . . . . . . . . . . . . .
San Francisco, CA . . . . . . . . . . . . . . . . . . .
Chicago, IL . . . . . . . . . . . . . . . . . . . . . . . .
Chicago, IL . . . . . . . . . . . . . . . . . . . . . . . .
Washington, D.C.
. . . . . . . . . . . . . . . . . . . .
West  Palm Beach, FL . . . . . . . . . . . . . . . . .
Boston, MA . . . . . . . . . . . . . . . . . . . . . . . .
Montreal, Canada . . . . . . . . . . . . . . . . . . . .
Vancouver, Canada . . . . . . . . . . . . . . . . . . .
London, United Kingdom . . . . . . . . . . . . . .
Zug, Switzerland . . . . . . . . . . . . . . . . . . . . .
Zug, Switzerland . . . . . . . . . . . . . . . . . . . . .
Vaduz, Liechtenstein . . . . . . . . . . . . . . . . . .
Sydney, Australia . . . . . . . . . . . . . . . . . . . .
Hong Kong . . . . . . . . . . . . . . . . . . . . . . . .
Hong Kong . . . . . . . . . . . . . . . . . . . . . . . .
Budapest, Hungary . . . . . . . . . . . . . . . . . . .
St. Petersburg, Russia . . . . . . . . . . . . . . . . .
Tallinn, Estonia . . . . . . . . . . . . . . . . . . . . .
Mumbai, India . . . . . . . . . . . . . . . . . . . . . .
Tokyo, Japan . . . . . . . . . . . . . . . . . . . . . . .
Shanghai, China . . . . . . . . . . . . . . . . . . . . .

81,266
42,196
5,869
833
48,275
13,217
8,884
8,509
2,348
4,566
2,737
12,969
19,246
4,435
2,370
3,358
8,872
6,739
6,002
2,742
6,600
12,061
2,161
3,635

2019
2019
2017
2019
2026
2017
2024
2027
2021
2019
2021
2023
2017
2021
2017
2023
2018
2019
2018
2017
2021
2020
2018
2018

Headquarters and  data center
Office space
Office space
Office space
Office space
Data center
Office space
Office space
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
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.

36

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.
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, many of which are still pending. The Litigation was consolidated with the
other lawsuits filed by Trading Technologies.

The United States Patent and Trademark Office (‘‘USPTO’’) issued decisions instituting Covered
Business Method Review (‘‘CBM Review’’)  on all of the  asserted patents and  has made  a finding that it
is more likely than not that the patents are invalid. The District  Court  granted the Defendants’ motion
to stay the Litigation pending the CBM Reviews. On  February 17, 2017,  the  USPTO issued  two
decisions finding that the claims of one  patent are  patentable and  the claims of another patent are not
patentable. On February 28, 2017, the USPTO issued a  decision  finding that most  of the claims of
another patent are not patentable and finding three claims of the same patent to be patentable. The
Defendants plan to appeal to the extent any claims 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, which  the Company

37

opposed. The Court has not yet ruled on these motions. We believe  that the proposed amended
complaint, like the original complaint,  lacks merit. Further,  even if the complaint ultimately were to
survive a motion to dismiss, 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
state securities laws, U.S. and foreign  securities, commodities and financial  services  laws  and under the
rules of more than 25 exchanges and  self-regulatory  organizations. 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 an advantage over potential newcomers to the business.

We  receive hundreds 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, 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 similar regulatory  matters, would  have a material
impact on our business, financial condition and results  of operations. Nonetheless,  in the current
climate, we expect to pay significant 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.

38

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:

2015

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

2016

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

Sales Price

High

Low

(in dollars)

$34.56
$42.46
$45.95
$44.85

$43.14
$41.40
$37.39
$39.68

$25.56
$32.22
$35.60
$36.71

$29.50
$33.75
$33.66
$31.97

The closing price of our common stock on February  22, 2017, as reported by NASDAQ, was  $38.13 per
share.

Holders

On February  21, 2017, there were five  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
2017. We currently intend to pay quarterly  dividends  of  $0.10 per share  to  our  common stockholders
for the foreseeable future.

39

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  30, 2011 to December 31, 2016.  The
comparison assumes $100 was invested  on  December  31, 2011 in  our common stock and  each of the
foregoing indices and assumes reinvestment of dividends before consideration  of income taxes.

S&P 500

Nasdaq Financial 100

IBKR

400

350

300

250

200

150

100

50

-

12/30/2011

4/30/2012

8/31/2012

12/31/2012

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

21FEB201719343717

(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

40

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.

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 2015, Holdings
redeemed 16,060,554 IBG LLC shares  with an approximate total value of $420  million, which
redemptions were funded using cash  on  hand at  IBG LLC and  through issuances of  common stock.

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 in July 2016 to redeem certain membership interests from
Holdings through the sale of common stock and  the distribution of the proceeds  of such sale to the
beneficial owners of such membership interests.

On July 28, 2016, the Company issued 1,596,200  shares of  Class  A  common stock (with a  fair value  of
$56 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 are to  be  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’’). A portion of the
acquired shares was sold during 2016 pursuant to the Plans. The remaining shares are held  for sale
under certain conditions, pursuant to the  Plans, in  open market transactions. 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.

Certain officers and directors are among the  members  of Holdings who  have elected to redeem a
portion of their Holdings membership  interests and therefore have an interest in  the proceeds  of  sale
of 1,050,000 shares of the Class A common stock to be sold pursuant to the Plans. In addition, certain
employees of the Company and its subsidiaries  also elected the redemption of a  portion of their
membership interests in Holdings and  therefore have  an interest in the  balance  of  the shares  to  be  sold
under the Plans and/or distributed by  Holdings. Neither Mr. Thomas Peterffy nor his  affiliates  have
elected to redeem any of their Holdings membership interests and therefore have no interest in the
proceeds of sale or distribution of the shares of Class A common stock acquired by Holdings on
July 28, 2016.

As a consequence of this transaction,  IBG, Inc.’s  interest  in IBG  LLC increased  to  approximately
16.6%, with Holdings owning the remaining  83.4%. The redemptions also resulted in  an increase in  the
Holdings interest held by Mr. Thomas  Peterffy and his affiliates  from  approximately  88.7% to
approximately 89.1%.

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 shares vest: 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. As of  December  31, 2016 the Company has sold 709,897
shares of its Class A common stock (with a  fair value of $26 million) in  open market transactions,

41

during 2016. 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 920,876 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.

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, 2016. 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 issuance 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

—

7,862,022

—

7,862,022

(1) Amount represents shares available  for  future issuance of grants under  the Company’s  2007 Stock
Incentive Plan (‘‘SIP’’). The amount excludes  shares purchased from employees to satisfy their tax
withholding obligations for vested shares,  which are  held  as treasury stock. No  shares are  available
for future issuance of grants under the  2007 ROI Unit Stock Plan; all shares under this plan  have
been granted.

42

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, 2012, 2013,  2014, 2015, and 2016.

Year Ended December 31,

2016

2015

2014

2013

2012

(in millions, except share and per share amounts)

Consolidated Statement of Comprehensive

Income Data

Revenues

Trading gains . . . . . . . . . . . . . . . . . . . . . . . $
Commissions and execution fees . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . .
Other (loss) income . . . . . . . . . . . . . . . . . .

Total revenues

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

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

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

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . .
Fixed expenses . . . . . . . . . . . . . . . . . . . . . .
Customer bad debt(1) . . . . . . . . . . . . . . . . .

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

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

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

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

Net income available for common stockholders . $

84 $

49 $

45 $

37 $

Earnings per share

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

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

1.28 $

1.25 $

0.80 $

0.78 $

0.79 $

0.77 $

0.74 $

0.73 $

466
413
270
44

1,193
62

1,131

251
350
3

604

527
30

497

456

41

0.89

0.89

Comprehensive income available for common

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

80 $

39 $

30 $

34 $

53

Comprehensive income attributable to

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

594 $

313 $

322 $

356 $

473

Comprehensive earnings per share

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

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

Weighted average common shares outstanding

1.21 $

1.19 $

0.64 $

0.62 $

0.52 $

0.51 $

0.69 $

0.67 $

1.13

1.13

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

66,013,247

61,043,071

56,492,381

49,742,428

46,814,676

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

67,299,413

62,509,796

57,709,668

50,924,736

47,070,522

(1) Electronic brokerage non-interest expenses  includes  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. 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.

43

December 31,

2016

2015

2014

2013

2012

(in millions)

Consolidated Statement of Financial Condition Data . . . .
Cash, cash equivalents and short-term  investments(1) . . . $26,053 $23,105 $17,059 $15,591 $14,526
Total assets(2)(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $54,673 $48,734 $43,385 $37,871 $33,200
Total liabilities(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $48,853 $43,390 $38,200 $32,779 $28,387
Stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . $
598
Noncontrolling interests . . . . . . . . . . . . . . . . . . . . . . . . . $ 4,846 $ 4,481 $ 4,419 $ 4,385 $ 4,215

863 $

766 $

707 $

974 $

(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, 2016, approximately $54.2 billion,  or  99.1%, 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 $273 million, $288 million, $279  million, $295 million,  and $282 million
and the corresponding payable to Holdings  was $285 million, $291  million, $277 million,
$287 million, and $259 million as of December 31,  2016, 2015, 2014, 2013, and 2012, respectively.

44

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.  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
26 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 16.6% 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  83.4% 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.
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.

(cid:129) 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  24 countries and in  23 currencies around the
world seamlessly. 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.

45

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  190 countries. Approximately 63%  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 the Probability LabSM, which
allows our customers to analyze option strategies under various market assumptions. IB
Investors’ MarketplaceSM 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. IB Portfolio Builder allows our  customers to set up an  investment strategy
based on research and rankings from  top research providers and fundamental data. 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 can  help investment advisors  trading on the IB platform
meet their registration and compliance needs.

(cid:129) Market Making. We conduct our market making business  primarily through our Timber Hill

subsidiaries. As a market maker on many of the world’s leading exchanges, we  provide liquidity
by offering competitively tight bid/offer spreads over  a broad base of over one million 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 and  to  be  profitable
in both up-market and down-market scenarios. In  the past several years our market making
business has suffered from competitive pressures and  along with  the rapid  increase of our
electronic brokerage business, its significance  continues to diminish.

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

Business Environment

Against a backdrop of global declines in  trading volumes, we maintained our position as  the largest
U.S. electronic broker as measured by the number of  customer  revenue trades, which increased 2%
from the prior year. New customer account growth remained  robust  as total customer  accounts
increased 16% to 385 thousand from 2015. Institutional  customers, such as  hedge funds,  mutual funds,
introducing brokers, proprietary trading groups and  financial advisors, comprised approximately 44% of
total accounts and approximately 63% of total  customer  equity at the end of 2016. Our customer  base
continues to be geographically diverse, with  customers residing  in over 190  countries and  over 50% of
new customers coming from outside the U.S. Average equity  per  account increased by 9%, to
$222 thousand compared to the prior year.

46

Electronic brokerage net interest income grew  25%, compared to 2015.  Our  low margin lending rates
are tied to benchmark rates, such as  the  Federal Funds rate in  the U.S. In  2016, our customers  paid
0.5% to 2.2% for their U.S. dollar margin loans with us. Customer margin loans increased  by  14%
from 2015, due to customers’ appetite  for increased risk, along with  expanded  prime broker financing
and average customer credit balances rose 16%  in 2016.

Market making segment results decreased in  2016, as trading gains were dampened by lower trading
volumes and decreases in volatility and in  the actual-to-implied volatility ratio as  compared to 2015.

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

Global trading volumes. According to data received from exchanges worldwide,  volumes in exchange-
listed equity-based options decreased by approximately  12% globally and 2% in the  U.S. for the year
ended December 31, 2016, compared to 2015.  During  2016  we accounted  for approximately 7.9%  (7.8%
in 2015) of the exchange-listed equity-based options volume  traded worldwide (including options on
ETFs and stock index products), and  approximately 10.9% (11.3% in  2015)  of  exchange-listed  equity-
based options volume traded in the U.S.  It is important to note that  this metric  is not directly
correlated with our profits. See tables on pages 61-63  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:4)’’), the average
volatility decreased to 15.9 in 2016, down  5% from the  average of 16.7 in 2015.

The ratio of actual to implied volatility  is also meaningful to our results. Because the  cost of hedging
our  positions is based on implied volatility, while our trading  profits are, in part, based  on actual
market volatility, a higher ratio has a generally favorable impact  on  our trading gains  and a  lower ratio
generally has a negative effect. This ratio averaged approximately 83% during 2016, compared to an
average of approximately 88% in 2015.

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 15 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  2016 the value of the GLOBAL,  as
measured in U.S. dollars, decreased  0.93% compared to its value as  of  December 31,  2015, which  had a
negative impact on our comprehensive  earnings for  2016. 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 $1.25 for the  year  ended December 31, 2016 (‘‘current year’’),
compared to diluted earnings per share of $0.78  for the  year ended December  31, 2015 (‘‘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 $1.19 for the current year, compared  to  diluted earnings per share of $0.62  for the  prior
year.

47

In connection with our currency diversification strategy, we determine our net worth in GLOBALs, a
basket of 15 major currencies in which  we  hold our equity. As a result, as of December  31, 2016,
approximately 53% of our equity was denominated  in currencies other than the U.S. dollar.  In the
current year, our currency diversification strategy decreased our comprehensive  earnings by $65  million
(versus a decrease of $269 million in  the prior year), as the  U.S.  dollar value  of the GLOBAL
decreased by  approximately 0.93%. 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.

As a result of a periodic assessment,  and in light of the increasing importance of China  to  our  business,
we changed the composition of the GLOBAL by adding the  Chinese renminbi  (specifically, the
offshore currency known by the symbol  CNH), removing the South Korean won  (KRW) and  Brazilian
real (BRL) components, and realigning the relative weights of the U.S. dollar (USD)  and Japanese  yen
(JPY) components to better reflect the  global  diversification  of  our businesses. The  new composition of
the GLOBAL went into effect as of  the close of business on  June 30, 2016.

Consolidated: For the current year, our net revenues were $1,396 million  and income before income
taxes was $761 million, compared to net revenues of $1,189  million and income before income taxes  of
$458 million in the prior year. The increase in  income before income taxes in the current  year was
mainly driven by a 24% increase in net  interest income and the non-recurrence of customer debt
expenses  resulting from the Swiss franc  event in January  2015, as further  described below, partially
offset by a 39% decrease in trading gains. Our  pre-tax profit margin was 55%,  compared to 39%  for
the prior year.

Electronic Brokerage: For the current year, income  before  income taxes in our electronic  brokerage
segment increased $220 million, or 41%,  compared to the prior  year, mainly driven by higher net
interest income and the non-recurrence of $137 million in  customer  bad debt expenses in the prior year
due to the Swiss franc event described below. Net revenues increased 13%, mainly from a 25% increase
in net interest income, due to higher customer  cash balances, the majority of which were  invested  in
interest-bearing U.S. government securities during the current  year, and from  a 62% increase  in other
income, driven by higher net mark-to-market gains  on our  U.S.  government securities portfolio. Pre-tax
profit margin was  61% for the current  year and  49%  for the prior year.  Customer accounts grew 16%
and  customer equity increased 27% from the prior year.  For the  current year, total Daily Average
Revenue Trades (‘‘DARTs’’) for cleared  and execution-only  customers increased  2% to 660 thousand,
compared to 647 thousand in  the prior year.

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.  Since January  2015, we have incurred
cumulative losses, net of hedging activity and debt collection  efforts, of $118  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.

48

Market Making: For the current year, income before  income  taxes in our market making  segment
decreased $86 million, or 66%, compared to the prior year.  Trading gains  decreased 39% on 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
compared to the prior year. Pre-tax profit margin was 23% for the current year and  44% for the prior
year.

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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year Ended December 31,

2016

2015

2014

(in millions)
$1,097
298
(206)

$1,239
190
(33)

$ 952
284
(193)

Total

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

$1,396

$1,189

$1,043

(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,

2016

2015

2014

(in millions)
$ 536
130
(208)

$756
44
(39)

$ 589
114
(197)

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

$761

$ 458

$ 506

(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.

49

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. Our revenue base is highly  diversified
and comprised of millions of relatively small individual trades  of  various  financial products traded on
electronic exchanges, primarily in stocks, options and futures.  Trading  gains accounted for
approximately 12%, 23%, and 25% of our total  net revenues for the years ended December 31, 2016,
2015, and 2014, respectively.

Trading gains also include revenues from net dividends. Market making activities require  us to hold a
substantial inventory of equity securities.  We derive significant revenues in the form  of dividend  income
from these equity securities. This dividend income is  largely  offset by dividend expense  incurred when
we make significant 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 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 operations.

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.

Our trading gains  are geographically diversified.  In  2016, 2015, and 2014,  we generated 66%, 59%, and
24%, respectively, of our trading gains  from operations conducted internationally.

Commissions and Execution Fees

We  earn commissions and execution fees 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  and execution  fees
accounted for 44%, 52%, and 53% of  our  total net revenues for  the years ended  December 31,  2016,
2015, and 2014, respectively.

Our commissions and execution fees are geographically diversified. In 2016, 2015, and  2014 we
generated 30%, 26%, and 25%, respectively, of  commissions  and execution fees 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
market making and brokerage activities; and on deposits with banks. Interest  income  accounted for
43%, 41%, and 40% of our total net  revenues for  the years ended December 31, 2016, 2015, and 2014,
respectively. Interest income is partially offset by  interest  expense.

50

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 6%, 6%, and 7% of our  total net revenues for  the years ended  December 31,  2016, 2015,
and 2014, 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 38%, 36%, and 33%  of our  total net revenues for  the
years ended December 31, 2016, 2015, and 2014, respectively.

Other Income

A primary component of other income  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.’’

Other income also consists of mark-to-market gains and losses on our  U. S. government  securities
portfolio; income from market data fees,  payments for order flow, minimum activity  fees,  risk exposure
fees; and gains and losses on financial instruments  at fair value  and other financial  instruments that are
not held for our market making operations. Other income (loss) accounted for approximately 7%,
(cid:5)10%, and (cid:5)11% of our total net revenues for the years ended December 31, 2016, 2015, and  2014,
respectively.

Costs and 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 as part  of exchange-mandated
programs and to otherwise attract order  volume to our system.

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.

51

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,  2016, we  held approximately 16.6% ownership interest in
IBG LLC. Holdings is owned by the original  members of IBG  LLC and  holds  approximately 83.4%
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 16.2%, compared to approximately 15.1% for the prior  year.

Certain Trends and Uncertainties

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

(cid:129) 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:129) 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:129) 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:129) 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:129) Additional consolidation among market centers may adversely affect the  value of our smart

routing software.

(cid:129) 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.

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.

52

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,

2016

2015

2014

(in millions, except share and per share
amounts)

Revenues

Trading gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Commissions and  execution fees . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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

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 . . . . . . . . .

244
242
51
30
62
6

635

761
62

699
615

231
227
44
25
58
146

731

458
43

415
366

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

84 $

49 $

Earnings per share

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

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

1.28 $

1.25 $

0.80 $

0.78 $

212
205
39
24
54
3

537

506
47

459
414

45

0.79

0.77

Weighted average common shares outstanding

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

66,013,247

61,043,071

56,492,381

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

67,299,413

62,509,796

57,709,668

Comprehensive income

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

84 $

49 $

45

Other comprehensive  income

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

Other comprehensive loss, net of tax . . . . . . . . . . . . . . . . . . . . . . .

(4)
—

(4)

(10)
—

(10)

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

80 $

39 $

Comprehensive income attributable to  noncontrolling interests

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

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

615 $
(21)

594 $

366 $
(53)

313 $

(15)
—

(15)

30

414
(92)

322

53

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,

2016

2015

2014

Revenues

Trading gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissions and execution fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income (loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12% 23% 25%
44% 52% 53%
43% 41% 40%
7% (10)%(11)%

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

106% 106% 107%
6% 6% 7%

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

17% 19% 20%
17% 19% 20%
4% 4% 4%
2% 2% 2%
4% 5% 5%
0% 12% 0%

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

45% 61% 52%

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

55% 39% 49%
4% 4% 5%
50% 35% 45%
44% 31% 40%

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

6% 4% 5%

Year Ended December 31, 2016 (‘‘current year’’)  compared to the Year Ended December 31,  2015

(‘‘prior year’’)

Net Revenues

Total net revenues, for the current year, increased $207 million, or  17%,  compared to the prior year,  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
and execution fees. Trading volume is  an important driver of revenues and costs for  both our  electronic
brokerage and market making segments. During the current year, our  futures  contract volume
increased 2%, while options contract  and stock share  volumes each decreased 10%,  compared to the
prior year.

Trading Gains

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

54

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 the prior year. The VIX(cid:4), which
measures perceived U.S. equity market volatility, decreased 5% to an  average of 15.9  for the  current
year, compared to an average of 16.7 for  the  prior year. The ratio  of  actual to implied  volatility
decreased to an average of 83% for the current  year,  compared to an average  of 88% for the prior
year.

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 and Execution Fees

Commissions and execution fees, for the current year, decreased $5 million, or 1%,  compared to the
prior year, 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 the prior  year. Total  DARTs  for cleared and  execution-only customers, for
the current year, increased 2% to 660  thousand, compared  to  647 thousand during 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  3%  to  609 thousand, compared to 589 thousand for  the prior
year. Average commission per DART  for cleared customers,  for the current  year,  decreased by 4% to
$3.92, compared to $4.07 for the prior year, reflecting  smaller average order sizes  across most product
types.

Interest Income and Interest Expense

Net interest income (interest income  less interest expense),  for the  current year, increased $102 million,
or 24%, compared to the prior year, 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.

Net interest income on customer balances,  for the  current year, increased $100  million, compared to
the prior year, 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% for the  current year, compared  to  the prior year.

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

55

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 the current year, average securities borrowed increased by 19%,  to  $4.2 billion and average securities
loaned decreased by 3%, to $2.9 billion, compared to the  prior year. 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 the  current year, net fees earned  by our  electronic brokerage and
market making segments from securities lending  transactions increased $6 million or  4%, compared to
the prior year. The increase in net interest  income  from securities  lending  transactions was attributable
to the market making segment.

The Company measures return on interest-earnings 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 borrowings, 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 indicated periods:

Year Ended December 31,

2016

2015

2014

(in millions)

Average interest-earning assets

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

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

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

$15,371
15,693
3,182
1,473

$47,290

$41,076

$35,719

Average interest-bearing liabilities

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

$39,980
2,897

$34,276
3,000

$28,713
2,927

$42,877

$37,276

$31,640

Net interest income

Segregated cash and securities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer margin borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities borrowed and loaned, net . . . . . . . . . . . . . . . . . . . . . . . .
Customer credit balances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other net interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

149
217
156
(12)
17

$

68
199
149
(11)
20

$

39
169
132
(19)
23

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

$

527

$

425

$

344

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

1.11%

1.03%

0.96%

Yields

0.25%
Segregated cash and securities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer margin borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.08%
Customer credit balances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (cid:5)0.03% (cid:5)0.03% (cid:5)0.07%

0.62%
1.31%

0.37%
1.15%

56

Other Income

Other income, for the current year, increased $216  million,  to  $94 million, compared to a  loss of
$122 million in the prior year, mainly  driven  by  $166 million  lower losses  on our currency
diversification strategy (loss of $40 million for the  current year, compared  to  a loss  of  $206 million in
the prior year), and $26 million net mark-to-market gains on our U.S. government  securities portfolio
in the current year, compared to $33  million  net mark-to-market  losses  in the  prior year, due to a
decline  in average medium term interests  rates  during the current  year; partially offset  by  the
non-recurrence of an $18 million gain  from hedging activities  related to the Swiss franc event in  the
prior year. 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, decreased $96 million, or  13%,  compared to the prior year,
to $635 million, mainly due to the non-recurrence  of $137 million in customer bad debt expense  due  to
the Swiss franc event in the prior year,  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% for the current year and 61% for the prior year.

Execution and Clearing

Execution and clearing expenses, for the  current year, increased $13 million, or  6%, compared to the
prior year, 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 the  current
year compared to the prior year.

Employee Compensation and Benefits

Employee compensation and benefits expenses, for the  current year, increased $15 million, or  7%,
compared to the prior year, 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%  for the  current year and
19% for the prior year.

Occupancy, Depreciation and Amortization

Occupancy, depreciation and amortization  expenses, for the current year, increased  $7 million, or 16%,
compared to the prior year, to $51 million, mainly due to higher office rent expenses during the current
year 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
the current year and the prior year.

57

Communications

Communications expenses, for the current year,  increased  $5 million, or 20%,  compared to the prior
year, to $30 million, mainly due to higher  costs of data lines to exchanges during the  current year. 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 $4  million, or  7%, compared  to
the prior year, 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% for the current year and 5% for  the prior year.

Customer Bad Debt

Customer bad debt expense, for the current year, decreased $140  million, or  96%, compared  to  the
prior year, 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 the prior year,  as described
above in the ‘‘Financial Overview’’ section.

Income Tax Expense

Income tax expense, for the current year,  increased $19  million, or 44%, to $62 million, compared to
the prior year, as income before taxes  increased $303 million, or 66%, during the same period.

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  and the  Swiss
franc related customer losses from the prior year were as follows: net revenues were $1,410 million,
unchanged from the prior year; 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% for the current year,
from 58% for the prior year.

Year Ended December 31, 2015 compared  to the Year Ended December 31, 2014

Net Revenues

Total net revenues, in 2015, increased $146 million, or 14%,  to  $1,189 million, compared to 2014.  The
increase in net revenues was primarily due  to  higher commissions and execution fees and net interest
income. Trading volume is an important driver  of revenues and costs for both our electronic brokerage
and market making segments. In 2015,  our  futures contract and  stock share volumes increased 14% and
12%, respectively, while options contract volume  remained  unchanged, compared to 2014.

Trading Gains

Trading gains, in 2015, increased $8 million,  or 3%, to $269  million,  compared to 2014. As market
makers, we provide liquidity by buying from sellers and selling  to  buyers.  In 2015,  our market making
operations executed 65.9 million trades, an increase  of 2% compared  to  the number  of trades executed
in 2014. Market making stock share volume increased  28%, while  options and futures contract  volumes
decreased 3% and 4%, respectively, compared to 2014.

Trading gains were favorably impacted  by higher  volatility levels  and  periods of higher trading  activity.
The VIX(cid:4), which measures perceived U.S. equity market volatility, increased 18%  to an  average of 16.7
in 2015, compared to an average of 14.2  in  2014. The ratio of actual to implied  volatility  increased  to
an average of 88% in 2015, compared  to  an  average of 79%  in 2014.

58

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 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 and Execution Fees

Commissions and execution fees, in 2015,  increased $68 million, or 12%, to $617 million, compared  to
2014, driven by continued customer account  growth and increased customer trading activity,  but
moderated by lower average commission per customer  order. Cleared customer options and  futures
contract volumes and stock share volume  increased 8%,  17%, and 12%, respectively,  from 2014. Total
DARTs for cleared and execution-only customers, in  2015, increased 14% to 647  thousand,  compared to
566 thousand in 2014. DARTs for cleared customers, i.e.,  customers for  whom we execute trades,  as
well as, clear and carry positions, in 2015,  increased 14% to 589 thousand, compared to 515  thousand
in 2014. Average commission per DART  for cleared customers, in 2015,  decreased by 2% to $4.07,
compared to $4.16 in 2014.

Interest Income and Interest Expense

Net interest income (interest income  less interest expense),  in 2015, increased $81  million, or  24%, to
$425 million, compared to 2014. The increase in net interest income  was driven  by  higher average
customer margin borrowings, higher average customer cash  balances which were invested in interest-
bearing instruments (e.g., U.S. government securities), and  higher net fees earned from securities
lending transactions.

Net interest income on customer balances,  in 2015, increased $66  million, compared to 2014, driven by
a $5.0 billion increase in average customer  cash  balances,  which were invested in interest-bearing
instruments (e.g., U.S. government securities),  and a  $1.6 billion increase  in average customer margin
borrowings. In addition, the average  Fed Funds  effective rate  increased by approximately  four basis
points to 0.13% in 2015, compared to 2014.

We  earn fees 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 2015, average securities borrowed  increased by 10%, to $3.5  billion and average securities loaned
increased by 2%, to $3.0 billion, compared to 2014.  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 2015, net fees earned  by our electronic  brokerage and market making  segments from
securities lending transactions increased $16 million, or 12%,  compared to 2014.  The  majority of the
increase in net interest income from securities  lending transactions  was  attributable to the electronic
brokerage segment.

59

Other Income

Other income, in 2015, decreased $11  million, or  10%, to a  loss of $122  million, compared to 2014,
mainly driven by $21 million higher losses  on our currency diversification strategy and  $36 million
higher  mark-to-market losses on U.S. government securities, partially offset  by  $15 million higher risk
exposure fee income and an $18 million gain from our hedging activities to offset  our  losses related  to
the Swiss franc event. 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 2015, increased  $194 million, or  36%, to $731 million, compared  to  2014,
mainly due to higher customer bad debt  expense due to the Swiss franc event, execution  and clearing
expenses, and employee compensation and benefits expenses. As a percentage of total net revenues,
non-interest expenses were 61% in 2015  and 51% in  2014.

Execution and Clearing

Execution and clearing expenses, in 2015,  increased $19  million, or 9%, to $231 million, compared to
2014, driven by higher trading volumes in  options, futures  and stocks  in the electronic  brokerage
segment and higher trading volumes in  stocks in the market making  segment.

Employee Compensation and Benefits

Employee compensation and benefits expenses, in 2015, increased $22 million, or  11%, to $227 million,
compared to 2014, mainly due to a 13%  increase  in the number of  employees to 1,087, compared to
960 in 2014. Approximately 15% of the  increase in  the number  of employees was due to the  acquisition
of Covestor, an online investment marketplace, during the  second quarter of 2015. Within  the operating
business segments, we continued to add staff  in 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  19% in
2015 and 20% in 2014.

Occupancy, Depreciation and Amortization

Occupancy, depreciation and amortization  expenses, in  2015, increased $5 million, or 13%,  to
$44 million, compared to 2014, mainly  due  to  higher amortization  expenses as  a result of  acquired
intangible assets during 2015. As a percentage of  total  net revenues,  occupancy, depreciation and
amortization expenses were 4% for both 2015 and 2014.

Communications

Communications expenses, in 2015, increased $1 million, or  4%,  to  $25 million, compared to 2014. As a
percentage of total net revenues, communications  expenses were 2% for both 2015  and 2014.

General and Administrative

General and administrative expenses,  in 2015, increased $4  million, or 7%, to $58 million, compared to
2014, mainly due to higher advertising  expenses. As a percentage  of total net revenues, general and
administrative expenses were 5% for  both  2015  and 2014.

60

Customer Bad Debt

Customer bad debt expense, in 2015, increased $143  million,  to  $146 million,  compared to 2014,
primarily due to unsecured customer losses of $137 million caused  by the  sudden move in  the value  of
the Swiss franc, as described above in  the ‘‘Financial  Overview’’  section,  and $7  million  caused by the
market volatility in August 2015.

Income Tax Expense

Income tax expense, in 2015, decreased  $4 million, or 9%, to $43 million, compared  to  2014, as income
before taxes decreased $48 million, or 9%,  during the same  period.

Our operating results, in 2015, excluding  the effects of our currency  diversification strategy, the net
mark-to-market losses from our U.S.  government securities portfolio and  the Swiss franc  related
customer losses, compared to 2014 were as  follows: net  revenues  were $1,410  million, up 12%;
non-interest expenses were $594 million, up  11%;  income  before income taxes was $816 million, up
14%; and pre-tax profit margin was 58% in 2015  and  57% in 2014.

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

Market
Making
Trades Change

%

Brokerage
Cleared
Trades

%
Change

Brokerage
Non
Cleared
Trades

%
Change

Total
Trades Change Trading Day

%

Avg. Trades
per U.S.

2012 . . . . . . . . . . . . . . . 60,421
2013 . . . . . . . . . . . . . . . 65,320
2014 . . . . . . . . . . . . . . . 64,530
2015 . . . . . . . . . . . . . . . 65,937
2016 . . . . . . . . . . . . . . . 64,038

150,000
8% 173,849
(1)% 206,759
2% 242,846
(3)% 259,932

16,118
16% 18,489
19% 18,055
17% 18,769
7% 16,515

226,540
15% 257,658
(2)% 289,344
4% 327,553
(12)% 340,485

904
14% 1,029
12% 1,155
13% 1,305
4% 1,354

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

TOTAL

Period

Options
(contracts)

%
Change

Futures
(contracts)

%
Change

Stocks
(shares)

%
Change

2012 . . . . . . . . . . . . . . . . . . . . . . . . . .
2013 . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . .

698,140
659,673
631,265
634,388
572,834

98,801
(6)% 121,776
(4)% 123,048
0% 140,668
(10)% 143,287

65,872,960
23% 95,479,739
1% 153,613,174
14% 172,742,520
2% 155,439,227

45%
61%
12%
(10)%

Notes:

(1) Futures contract volume includes  options on  futures

61

MARKET MAKING

Period

Options
(contracts)

%
Change

Futures
(contracts)

%
Change

Stocks
(shares)

%
Change

2012 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2013 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . . .

457,384
404,490
344,741
335,406
307,377

12,660
(12)% 18,184
(15)% 15,668
(3)% 14,975
(8)% 14,205

9,339,465
44% 12,849,729
(14)% 12,025,822
(4)% 15,376,076
(5)% 13,082,887

38%
(6)%
28%
(15)%

BROKERAGE TOTAL

Period

Options
(contracts)

%
Change

Futures
(contracts)

%
Change

Stocks
(shares)

%
Change

2012 . . . . . . . . . . . . . . . . . . . . . . . . . .
2013 . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . .

240,756
255,183
286,524
298,982
265,457

86,141
6% 103,592
12% 107,380
4% 125,693
(11)% 129,082

56,533,495
20% 82,630,010
4% 141,587,352
17% 157,366,444
3% 142,356,340

46%
71%
11%
(10)%

BROKERAGE CLEARED

Period

Options
(contracts)

%
Change

Futures
(contracts)

%
Change

Stocks
(shares)

%
Change

2012 . . . . . . . . . . . . . . . . . . . . . . . . . .
2013 . . . . . . . . . . . . . . . . . . . . . . . . . .
2014 . . . . . . . . . . . . . . . . . . . . . . . . . .
2015 . . . . . . . . . . . . . . . . . . . . . . . . . .
2016 . . . . . . . . . . . . . . . . . . . . . . . . . .

144,539
180,660
225,662
244,356
227,413

84,794
25% 101,732
25% 106,074
8% 124,206
(7)% 128,021

54,371,351
20% 78,829,785
4% 137,153,132
17% 153,443,988
3% 138,523,932

45%
74%
12%
(10)%

Notes:

(1) Futures contract volume includes  options on  futures

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

Year over Year

4Q2016

4Q2015

% Change

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

385
$ 85.5

331
$ 67.4

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

591
640

582
641

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

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

$ 4.01
394
$3,205

$ 3.81
447
$3,239

16%
27%

2%
(0)%

5%
(12)%
(1)%

*

Excludes non-customers.

62

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.

Electronic Brokerage

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

Year Ended December 31,

2016

2015

2014

(in millions)

Revenues

Commissions and execution fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

$ 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

181
113
21
14
148
6

483

160
97
16
12
130
146

561

$549
352
81

982
30

952

148
80
11
11
110
3

363

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

$ 756

$ 536

$589

Year Ended December 31, 2016 (‘‘current year’’)  compared to the Year Ended December 31,  2015

(‘‘prior year’’)

Electronic brokerage total net revenues, for the  current year, increased $142 million, or  13%, compared
to the prior year, to $1,239 million, primarily  due to higher net interest income and other income.

63

Commissions and execution fees, for the current year, decreased $5 million, or 1%,  compared to the
prior year, 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 the prior  year. Total  DARTs  for cleared and  execution-only customers, for
the current year, increased 2% to 660  thousand, compared  to  647 thousand during 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  3%  to  609 thousand, compared to 589 thousand for  the prior
year. Average commission per DART  for cleared customers,  for the current  year,  decreased 4% to
$3.92, compared to $4.07 for the prior year, reflecting  smaller average order sizes  across product types.

Net interest income, for the current year,  increased  $98 million, or 25% compared to the prior  year, 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% for the current year, compared to the prior year.

Other income, for the current year, increased $49  million,  or  62%, compared  to  the prior year, 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 the prior  year,  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 the prior year.  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, decreased $78 million, or  14%,  compared to the prior year,
to $483 million, mainly due to a decrease in bad debt  expense of $140 million,  or 96%, compared to
the prior year, to $6 million, on the non-recurrence of $137 million in customer  bad debt expense
related to the Swiss franc event in the prior year. 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 the current year compared to the  prior
year. 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 for the current year include  higher  professional  fees and expenses related to legal and
regulatory matters, compared to the prior year. As a percentage  of total net  revenues, non-interest
expenses were 39% for the current year and 51% for the prior year.

Income before income taxes, for the  current year, increased $220  million, or  41%, compared  to  the
prior year, to $756 million. As a percentage of total net  revenues  for the  electronic brokerage segment,
income before income taxes was 61%  for the  current year and 49% for 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 and the Swiss franc related customer  losses from
the prior year 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% for the current year  from 62% for the prior year.

64

Year Ended December 31, 2015 compared  to the Year Ended December 31, 2014

Electronic brokerage total net revenues, in 2015, increased $145 million, or  15%, compared to 2014, to
$1,097 million, primarily due to higher commission  and execution  fees  and net  interest  income.

Commissions and execution fees, in 2015,  increased $69 million, or 13%, compared to 2014,  to
$618 million, driven by continued customer account growth and increased  customer trading activity,  but
moderated by lower average commission per customer  order. Cleared customer options and  futures
contract and stock share volumes increased 8%, 17%, and 12%, respectively. Total DARTs for cleared
and execution-only customers, in 2015,  increased 14%  to  647 thousand, compared to 566 thousand
during 2014. DARTs for cleared customers, i.e., customers for whom  we execute trades, as well  as, clear
and carry positions, in 2015, increased  14% to 589 thousand,  compared to 515 thousand in  2014.
Average commission per DART for cleared customers, in 2015, decreased  by  2% to $4.07, compared to
$4.16 in 2014.

Net interest income, in 2015, increased $78 million, or 24%, compared  to 2014, to $400  million.  The
increase in net interest income was attributable to higher net customer  interest of $66 million, driven
by a $5.0 billion increase in average customer  cash  balances, the majority  of  which were invested in
interest-bearing U.S. government securities,  and a  $1.6 billion increase  in average  customer margin
borrowings, and higher net fees from securities  lending transactions of $14 million.  In  addition, the
average Fed Funds effective rate increased by approximately four  basis points  to  0.13% in 2015,
compared to 2014.

Other income, in 2015, decreased $2  million, or  2%, compared to 2014,  to $79 million, mainly due to
$36 million higher mark-to-market losses on U.S.  government  securities, largely  offset by $15  million
higher  risk exposure fee income and an  $18 million gain from hedging activities  related to the  Swiss
franc event. 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 2015, increased  $198 million, or  55%, compared to 2014,  to  $561 million,
mainly due to $137 million bad debt expense as  a result of the sudden move in the value of the Swiss
franc as described above in the ‘‘Financial  Overview’’  section,  and  $7 million  bad debt expense caused
by the market volatility in the late-August period. Within non-interest expenses, execution and clearing
expenses increased $12 million, or 8%,  due to higher trading volume across all product  classes.
Employee compensation and benefits expenses increased $17  million,  or  21%, due to a  13% increase in
the average number of employees. General  and  administrative expenses increased  $20 million, or 18%,
primarily due to higher administrative, consulting and advertising  expenses. As a percentage  of total net
revenues, non-interest expenses were 51% in  2015 and  38% in 2014.

Income before income taxes, in 2015, decreased $53  million, or 9%, compared to 2014,  to  $536 million.
As a percentage of total net revenues  for the  electronic brokerage segment, income before income
taxes was 49% in 2015 and 62% in 2014.

Electronic brokerage operating results, in  2015, excluding the  effects of the net  mark-to-market gains
and losses from our U.S. government securities portfolio and  the Swiss franc related customer losses,
compared to 2014 were as follows: net  revenues were $1,112 million, up  16%;  non-interest  expenses
were $424 million, up 17%; income before income taxes was $688 million,  up 15%; and  pre-tax profit
margin was 62% for both 2015 and 2014.

65

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

Year Ended
December 31,

2016

2015

2014

(in millions)

$163
71
4

238
48

190

$269
62
10

341
43

298

$261
65
2

328
44

284

Non-interest expenses

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

63
31
4
10
38

72
38
4
10
44

64
41
6
9
50

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

146

168

170

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

$ 44

$130

$114

Year Ended December 31, 2016 (‘‘current year’’)  compared to the Year Ended December 31,  2015

(‘‘prior year’’)

Market making total net revenues, for the current year,  decreased  $108 million, or 36%, compared to
the prior year, to $190 million, primarily due to lower trading  gains, partially offset  by  higher net
interest income.

Trading gains, for  the current year, decreased $106  million,  or  39%, compared  to  the prior year, 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 the prior  year. The VIX(cid:4), which measures
perceived U.S. equity market volatility, decreased 5%  to  an average of 15.9  for the  current year,
compared to an average of 16.7 for the  prior year.  The  ratio of actual to implied volatility decreased to
an average of 83% for the current year,  compared to an average of 88% for the prior year.  Options
and futures contract and stock share volumes decreased 8%, 5%,  and  15%,  respectively, compared to
the prior year.

Net interest income, for the current year,  increased $4 million, or 21%, compared to the prior  year, 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 the current year, these  factors  produced more net interest income than
in the prior year.

Non-interest expenses, for the current  year,  decreased $22 million, or  13%,  compared to the prior year,
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

66

expense 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%  for the  current
year and 56% for the prior year.

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

Year Ended December 31, 2015 compared  to the Year Ended December 31, 2014

Market making total net revenues, in 2015, increased  $14 million, or 5%,  compared to 2014, to
$298 million, primarily due to higher trading gains and other income as a result of higher dividend
income received from other investments.

Trading gains, in 2015, increased $8 million,  or 3%, compared to 2014, to $269  million. Trading gains
were favorably impacted by higher volatility levels and periods  of higher trading activity. The VIX(cid:4),
which  measures perceived U.S. equity  market volatility, increased  18% to an average  of  16.7 in 2015,
compared to an average of 14.2 in 2014. The ratio  of  actual to implied volatility increased to an
average of 88% in 2015, compared to an  average of 79%  in  2014. Stock share volume  increased 28%,
while options and futures contract volumes decreased 3%  and 4%, respectively, compared  to  2014.

Net interest income, in 2015, decreased  $2 million, or  10%, compared to 2014, to $19  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 2015, these factors, together with  a reduction  in  interest earned on  deposits with banks,
produced less net interest income than  in  2014.

Non-interest expenses, in 2015, decreased $2  million,  or 1%,  compared to 2014,  to  $168 million. The
decrease was primarily due to a $6 million decrease in general and administrative  expenses driven by
lower administrative and consulting fees,  primarily for internal software  development, and a $3 million
decrease in employee compensation and benefits  expenses as reductions  in staff in the  market  making
segment continued; partially offset by an  $8 million increase  in execution and clearing driven by higher
trading volumes. As a percentage of total  net revenues, non-interest expenses  were 56% in 2015  and
60% in 2014.

Income before income taxes, in 2015, increased  $16 million, or 14%, compared  to  2014, to
$130 million. As a percentage of total net  revenues for the market making  segment, income before
income taxes was 44% in 2015 and 40% in 2014.

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, 2016, total assets were  $54.7 billion  of
which  approximately $54.2 billion, or  99.1% were considered liquid.

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

67

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.

Liability balances, as of December 31,  2016, in connection with our  short term  borrowings,  securities
loaned, and payables to customers were  higher  than  their  respective  average monthly balances during
the current year. 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.

Cash and cash equivalents held by our non-U.S. operating companies as of December 31, 2016  were
$448 million ($382 million as of December 31,  2015).  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 December 2015,
June 2016, and December 2016 dividends  of  $80 million, $40 million, and $22 million, respectively,
were paid to IBG LLC from three of  our  non-U.S. subsidiaries. As of December 31,  2016, we  had no
intention to repatriate further amounts from  non-U.S. operating companies. In the  event dividends
were to be paid to the Company in the  future by a non-U.S.  operating company, the Company  would
be required to accrue and pay income  taxes  on such  dividends  to  the extent that U.S. income taxes had
not been paid previously on the income  of the  paying company.

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 9% to
$5.8 billion as of December 31, 2016 from $5.3 billion as of  December 31,  2015. This  increase is
attributable to total comprehensive income, partially offset by distributions and  dividends  paid during
2016.

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

Year Ended December 31,

2016

2015

2014

(in millions)
$ 725
(35)
(295)

$ 544
(6)
(189)

$ 417
54
(308)

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

(25)

(63)

(107)

Increase in cash and cash equivalents . . . . . . . . . . . . . . . . .

$ 324

$ 332

$ 56

Our cash  flows from operating activities  are largely  a reflection  of the size  and composition of trading
positions held by our market making subsidiaries, and  of the changes in customer  cash and margin
balances in our electronic brokerage business. 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 create new
opportunities for ourselves as market makers  or where  we can influence exchanges to provide

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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, 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.

Year Ended December 31, 2014: Our cash and cash equivalents increased by  $56 million to
$1,269 million for the year ended December 31, 2014.  We raised $417 million in net  cash from
operating activities. We used net cash of  $254 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 CFTC,  the Chicago Board Options Exchange, the Chicago Mercantile
Exchange and FINRA. 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 consolidated financial statements in Part II, Item 8 of this
Annual Report on Form 10-K for further information  regarding our regulated operating companies.

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As of December 31, 2016, aggregate  excess regulatory capital for all of the  operating companies  was
$4.2 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

$3,254
306
577
659

$4,796

(in millions)
$294
1
174
96

$565

$2,960
305
403
563

$4,231

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 $27 million, $30 million, and $19  million for  the three  years ended December  31, 2016,
2015, and 2014, respectively. In the future, we plan  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, 2016.

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

$285
49

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

$334

(in millions)
$49
8

$57

$44
27

$71

$192
14

$206

Payments Due by Year

Total

2017 - 2018

2019 - 2020

Thereafter

(1) As of December 31, 2016, contractual amounts owed  under the tax receivable  agreement of

$285 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, 2016, approximately $116 million of cumulative
cash payments have been made.

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

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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; OneChicago LLC  and CBOE
Stock Exchange, LLC.

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, 2016, there were  no 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.

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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 16.6%  ownership  interest in IBG LLC.  Holdings is
owned by the original members of IBG  LLC and holds approximately 83.4% ownership interest in
IBG LLC. Our current share of IBG  LLC’s net  income  is approximately 16.6%.

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, 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 have large  and substantially 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.

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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, 2016, 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, 2016 and December 31, 2015,  reserves  provided for
potential losses related to litigation matters  were  not  material.

73

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.

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.

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.  Management is
not aware of any such changes that would  have a  material effect on our results of  operations, cash
flows, or financial position.

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  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.

74

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 2015-14 Revenue from Contracts with Customers

(Topic  606): Deferral of the Effective
Date.

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

ASU 2016-01 Financial Instruments—Overall (Subtopic

Effective for fiscal years beginning after

825-10): Recognition and Measurement of December  15, 2017.
Financial Assets and Financial Liabilities.

ASU 2016-02 Leases (Topic 842): Requires that, at lease

Effective for fiscal years beginning after

inception, a lessee recognize a right-of-use December  15, 2018.
asset, representing the right to use the
underlying asset for the lease term, and  a
lease liability, representing the liability to
make lease payments, in the statements of
financial condition, among other
requirements.

ASU 2016-07

Investments—Equity Method and Joint
Ventures  (Topic 323): Simplifying the
Transition to the Equity Method of
Accounting.

ASU 2016-08 Revenue from Contracts with Customers

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

Effective for fiscal years beginning after
December 15, 2016.

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

ASU 2016-09 Compensation—Stock Compensation (Topic Effective for annual reporting periods

718): Improvements to Employee Share-
Based Payment Accounting.

beginning after December  15, 2016.

ASU 2016-10 Revenue from Contracts with Customers

(Topic  606): Identifying Performance
Obligations and Licensing.

ASU 2016-12 Revenue from Contracts with Customers

(Topic  606): Narrow-Scope Improvements
and Practical Expedients.

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 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.

75

Affects

Status

ASU 2016-17 Consolidation (Topic 810): Interests Held
through Related Parties That Are under
Common Control.

Effective for fiscal years beginning after
December 15, 2016.

ASU 2016-19 Technical Corrections and  Improvements.

Effective upon issuance.

ASU 2016-20 Technical Corrections and Improvements to

Topic 606: Revenue from Contracts with
Customers.

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.

Effective for fiscal years beginning after
December 15, 2019.

Adoption of those ASUs that became  effective  during  2016 and  2017 prior  to  the issuance of our
consolidated financial statements, did not have a material  effect on  these financial statements.

The Company early adopted ASU 2016-09 Compensation—Stock Compensation (Topic 718),
Improvements to Employee Share-Based  Payment Accounting,  as of April 1, 2016.  This early adoption
did not have a material impact on the  Company’s consolidated financial statements.

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.

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

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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:129) 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.

(cid:129) 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.

77

Our market making systems incorporate  cash forex and forex options 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.

The table below shows a comparison  of the U.S. dollar equivalent of the  GLOBAL  as of December 31,
2016 and 2015.

As of  12/31/2015

As of  12/31/2016

CHANGE  in
Currency Composition FX Rate USD  Equiv. Comp. (in  USD millions) Composition FX Rate USD  Equiv. Comp. (in USD millions) % of  Comp.

GLOBAL in % of

GLOBAL in % of

Net Equity

Net Equity

New

USD .
.
EUR .
JPY .
.
GBP .
.
HKD .
INR .
.
CHF .
.
CAD .
.
CNH .
AUD .
MXN .
SEK .
.
SGD .
.
NOK .
DKK .
KRW .
BRL .
.

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

0.41
0.17
10.00
0.03
0.26
2.00
0.03
0.04
0.00
0.03
0.30
0.09
0.01
0.06
0.04
28.00
0.08

1.0000
1.0858
0.0083
1.4738
0.1290
0.0151
0.9976
0.7227

0.7286
0.0582
0.1184
0.7051
0.1131
0.1455
0.0009
0.2525

0.410
0.185
0.083
0.044
0.034
0.030
0.030
0.029

0.022
0.017
0.011
0.007
0.007
0.006
0.024
0.020

0.958

42.8%
19.3%
8.7%
4.6%
3.5%
3.2%
3.1%
3.0%

2.3%
1.8%
1.1%
0.7%
0.7%
0.6%
2.5%
2.1%

2,287
1,030
464
247
187
168
167
161

122
97
59
39
38
32
133
113

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

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%

2,759
1,096
420
227
206
180
181
183
167
133
89
61
42
43
35

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
0.00
0.00

100.0%

5,344

0.949

100.0%

5,820

4.6%
(cid:5)0.4%
(cid:5)1.5%
(cid:5)0.7%
0.0%
(cid:5)0.1%
0.0%
0.1%
2.9%
0.0%
(cid:5)0.3%
(cid:5)0.1%
0.0%
0.0%
0.0%
(cid:5)2.5%
(cid:5)2.1%

0.0%

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 decreased from $0.958 to $0.949,  or  0.93%, as of  December 31,  2016
compared to December 31, 2015. As of December 31,  2016,  approximately  53% of our equity was
denominated in currencies other than the U.S. dollar.

Changes in the Composition of the ‘‘GLOBAL’’

As a result of a periodic assessment,  and in light of the increasing importance of China  to  our  business,
we changed the composition of the GLOBAL by adding the  Chinese renminbi  (specifically, the
offshore currency known by the symbol  CNH), removing the South Korean won  (KRW) and  Brazilian
real (BRL) components, and realigning the relative weights of the U.S. dollar (USD)  and Japanese  yen
(JPY) components to better reflect the  global  diversification  of  our businesses. The  new composition
contains 15 currencies, one fewer than  the prior  composition.  The  new  composition was  effective  as of
the close of business on June 30, 2016 and the conversion to the new targeted currency holdings took
place shortly thereafter.

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.

78

Interest Rate Risk

We  had no variable-rate debt outstanding as of December 31,  2016.

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 seven 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, 2016, and assuming reinvestment of maturing
instruments in instruments of similar initial  maturity  at purchase, an increase of 0.25%  over current
interest rate levels would increase our net  interest income by approximately $46 million over the  first
year and approximately $62 million on  an annualized basis,  assuming the full effect  of  reinvestment at
higher  rates. 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, 2016, and assuming reinvestment  of  maturing instruments in
instruments of similar initial maturity at purchase, a decrease  in interest rates of 0.25%, would  reduce
our  net interest income by approximately $11 million over the first year and approximately $7 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. We hedge
such risks by entering into interest rate futures contracts. To the extent that these futures positions do
not perfectly hedge this interest rate risk, our trading gains  may  be  adversely affected.  The  amount  of
such risk cannot be quantified.

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.

Margin Credit

We  extend margin credit to our customers, which is subject to various regulatory requirements.  Margin
credit is 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 credit 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.

79

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
credit 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, 2016, we had  $19.4 billion  in margin credit extended to
our  customers. The amount of risk to  which we are  exposed from the margin credit 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 credit 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
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.

80

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,
2016

At December 31,
2015

Average High
2016

2016

(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

$22
11

$33

$13
1

$14

$25
43

$68

$12
—

$12

$24
26

$50

$14
—

$14

$26
41

$67

(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 2016.

(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.

81

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, 2016 and 2015 . . . . . . . . . .
Consolidated Statements of Comprehensive Income for  the years ended December 31, 2016,

2015, and 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consolidated Statements of Cash Flows  for  the years ended December  31, 2016,  2015, and 2014 .
Consolidated Statements of Change in  Equity for  the years ended December 31, 2016, 2015, and

83
84

85
86

2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplementary Data—Unaudited Quarterly Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

87
88
126

82

REPORT OF INDEPENDENT REGISTERED  PUBLIC  ACCOUNTING FIRM

To the Board of Directors and Stockholders  of
Interactive Brokers Group, Inc.
Greenwich, CT

We  have audited the accompanying consolidated statements of financial  condition  of  Interactive
Brokers Group, Inc. and subsidiaries  (the  ‘‘Company’’)  as of December 31,  2016 and  2015, and 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, 2016. These financial statements are  the
responsibility of the Company’s management. Our responsibility is  to  express  an opinion on these
financial statements based on our audits.

We  conducted our audits in accordance  with the standards  of  the Public Company Accounting
Oversight Board (United States). Those  standards require that we  plan and perform the audit to obtain
reasonable assurance about whether  the  financial  statements are free  of material misstatement.  An
audit includes examining, on a test basis, evidence  supporting the amounts and disclosures  in the
financial statements. An audit also includes assessing the accounting  principles used  and significant
estimates made by management, as well as  evaluating the overall financial statement presentation. We
believe that our audits provide a reasonable  basis for our opinion.

In our opinion, such consolidated financial  statements  present fairly, in  all  material  respects, the
financial position of Interactive Brokers  Group, Inc. and subsidiaries as of  December 31, 2016 and
2015, and the results of their operations  and  their  cash flows for each of the three years in  the period
ended December 31, 2016, 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), the Company’s internal  control over  financial reporting as of December 31,
2016, based on the 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, 2017 expressed an unqualified opinion  on the  Company’s internal  control over financial
reporting.

/s/ Deloitte & Touche LLP
New York, New York
February 28, 2017

83

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 $97 and $130 as  of  December 31,

2016 and 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brokers, dealers  and clearing organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total receivables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31,

2016

2015

$ 1,925
24,017
3,629
111

$ 1,601
21,309
3,924
195

2,104
1,933

4,037

1,987
1,433

3,420

19,409
1,040
57

20,506

448

17,050
692
63

17,805

480

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$54,673

$48,734

Liabilities and equity
Short-term borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities loaned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commitments,  contingencies and guarantees  (see Note  13)
Equity
Stockholders’ equity

Common stock, $0.01  par value per share:
Class  A—Authorized—1,000,000,000, Issued—68,119,412 and 64,121,150  shares,

Outstanding—67,984,973 and 63,985,335 shares as of December 31,  2016 and  2015 .

Class  B—Authorized,  Issued and  Outstanding—100  shares as  of December  31, 2016

and 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Additional paid-in capital
Retained earnings
Accumulated other comprehensive income, net  of  income  taxes of $0 and  $0 as of

December 31,  2016 and  2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treasury stock,  at cost, 134,439 and 135,815 shares as of  December  31, 2016 and 2015

Total stockholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noncontrolling interests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

74
4,293
2,145

$ —
2,894
2,617

41,731
239
285
80
6

42,341

48,853

37,084
423
291
78
3

37,879

43,390

1

—
775
203

(2)
(3)

974
4,846

5,820

1

—
718
145

2
(3)

863
4,481

5,344

Total liabilities  and equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$54,673

$48,734

See accompanying notes to the consolidated financial statements.

84

Interactive Brokers Group, Inc. and Subsidiaries

Consolidated Statements of Comprehensive Income

(in millions,  except share or per share amounts)

Revenues

Trading  gains
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissions  and  execution  fees . . . . . . . . . . . . . . . . . . . . .
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,

2016

2015

2014

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

261
549
416
(111)

1,115
72

1,043

231
227
44
25
58
146

731

458
43

415
366

49

0.80

0.78

$

$

$

212
205
39
24
54
3

537

506
47

459
414

45

0.79

0.77

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

66,013,247

61,043,071

56,492,381

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

67,299,413

62,509,796

57,709,668

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

$

84

$

49

$

Other comprehensive income

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

income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Other comprehensive  loss, net of  tax . . . . . . . . . . . . . . . . . .

Comprehensive  income  available  for  common stockholders . . .

Comprehensive  income  attributable  to  noncontrolling interests

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

adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

(4)

—

(4)

80

615

(21)

$

$

(10)

—

(10)

39

366

(53)

$

$

Comprehensive  income  attributable  to  noncontrolling interests .

$

594

$

313

$

45

(15)

—

(15)

30

414

(92)

322

See accompanying notes to the consolidated financial statements.

85

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 loss  on other  investments,  net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bad debt expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financial instruments sold,  but not yet purchased, at  fair  value . . . . . . . . . . . . . . . . . . .
Payable to customers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other payables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year-Ended December 31,

2016

2015

2014

$

699

$

415

$

459

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

18
20
41
10
3

(1,409)
(908)
—
468
(3,458)
(283)
36
635
(585)
5,476
(106)

Net cash provided by operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

544

725

417

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 provided by (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 . . . . . . . . . . . . . . . . . . . . .

(17)
38
(27)

(6)

74
(26)
(219)
(26)
25
(17)

(189)

(25)

(16)
11
(30)

(35)

(34)
(25)
(227)
(25)
29
(13)

(295)

(63)

(443)
516
(19)

54

10
(23)
(279)
—
—
(16)

(308)

(107)

Net increase in cash  and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents at beginning  of period . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

324
1,601

332
1,269

56
1,213

Cash and cash equivalents at end of  period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 1,925

$ 1,601

$ 1,269

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

$

$

$

$

$

$

$

77

29

56

$

$

$

68

31

132

(56)

$ (132)

25

(25)

$

$

26

(26)

$

$

$

$

$

$

73

37

35

(35)

10

(10)

(5)

$ — $ —

See accompanying notes to the consolidated financial statements.

86

Interactive Brokers Group, Inc. and Subsidiaries

Consolidated Statements of Changes in Equity

Three Years Ended December 31, 2016, 2015, and  2014

(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

$1

$583
35

$ (3)

$ 99

$ 27

Balance, December 31, 2013 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54,788,049
1,358,478
Issuance of common stock in follow-on  offering . . . . . . . . . . . . . . . . . . . .
Common stock distributed pursuant to stock incentive  plans . . . . . . . . . . . . .
2,445,200
Compensation for stock grants vesting in the  future . . . . . . . . . . . . . . . . . .
Stock incentive plan adjustment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred tax benefit retained—follow-on offering . . . . . . . . . . . . . . . . . . .
Dividends paid to stockholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distributions from IBG LLC to noncontrolling  interests
. . . . . . . . . . . . . . .
Adjustments for changes in proportionate  ownership  in IBG LLC . . . . . . . . .
Comprehensive income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20,518

8
7

Balance, December 31, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58,612,245

1

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

3,021,778
2,487,127

Balance, December 31, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64,121,150

1

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

1,596,200
2,402,062

6

1

10

635

39

9
5

4

26

718

22

8
2

25

(3)

(25)
25

(3)

(26)
26

(23)

45

121

(25)

49

145

(26)

84

Balance, December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68,119,412

$1

$775

$ (3)

$203

See accompanying notes to the consolidated  financial  statements.

(15)

12

(10)

2

(4)

$ (2)

$707
35
—
6
—
1
(23)

10
30

766

39
—
9
5

(25)
29
(25)

26
39

863

22
—
8
2

(26)
26
(26)

25
80

$974

$4,385
(35)

35
1

(279)
(10)
322

$5,092
—
—
41
1
1
(23)
(279)
—
352

4,419

5,185

(39)

41

(227)
(26)
313

—
—
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

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 16.6% 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, England, Switzerland,  Liechtenstein, India, China (Hong Kong and
Shanghai), Japan, and Australia. As of  December 31, 2016, the  Company had 1,204 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 Canada Inc. (‘‘IBC’’);  Interactive  Brokers (U.K.) Limited and its subsidiary,
Interactive Brokers (U.K.) Nominee  Limited (collectively, ‘‘IBUK’’); Interactive Brokers Securities
Japan, Inc. (‘‘IBSJ’’); Interactive Brokers  Hong  Kong Limited (‘‘IBHK’’);  Interactive  Brokers  (India)
Private Limited (‘‘IBI’’); 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 LLC (‘‘TH LLC’’); Timber  Hill Europe AG and its
subsidiary, Timber Hill (Liechtenstein)  AG (collectively,  ‘‘THE’’); Timber Hill Australia Pty Limited
(‘‘THA’’); Timber Hill Canada Company (‘‘THC’’); Interactive Brokers Financial Products  S.A.
(‘‘IBFP’’); Interactive Brokers Hungary  KFT (‘‘IBH’’);  Interactive Brokers Software Services Estonia
OU (‘‘IBEST’’); Interactive Brokers Software Services Russia (‘‘IBRUS’’);  Interactive  Brokers  Software
Services (India) Private Limited (‘‘IBSSI’’);  and IB Exchange Corp. (‘‘IBEC’’)  and its subsidiaries,
Interactive Brokers Corp. (‘‘IB Corp’’), Covestor,  Inc. and its subsidiary, Covestor Limited (collectively,
‘‘Covestor’’), and Greenwich Advisor Compliance  Services Corp. (‘‘GACS’’).

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 the world’s leading exchanges and market centers, primarily in exchange-traded equities,
equity options and equity-index options  and futures. 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 15). IB LLC,  IBC, IBUK,  IBSJ, IBHK,  and  IBI carry securities accounts for
customers or perform custodial functions  relating  to  customer securities.

88

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.

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, and  contingency reserves.

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.

89

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

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 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  as such instruments  are  not exchange-traded. 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 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.

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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 $7.4 billion and $15.2 billion as  of  December 31, 2016 and
December 31, 2015, respectively, and securities purchased under agreements  to  resell  in the amount of
$11.0 billion and $0.6 billion as of December 31, 2016 and December 31, 2015,  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’’).

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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, 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.

The Company also enters into currency forward contracts. These transactions, which are also  accounted
for on a trade date basis, are agreements to exchange  a  fixed amount of one currency for a specified
amount of a second currency at completion of the currency forward contract term. Unrealized
mark-to-market gains and losses on currency forward contracts are included  in financial instruments
owned, at fair value or financial instruments  sold,  but  not yet purchased, at fair value  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’’).

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Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

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
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, $22 million as of December 31,  2016 ($32 million as  of  December  31, 2015), 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, $33 million as of December 31,
2016 ($34 million as of December 31,  2015), 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 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

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Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

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.

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.

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 and Execution Fees

Commissions earned for executing and  clearing transactions  are  accrued on a trade date basis  and are
reported as commissions and execution  fees  in the consolidated statements of comprehensive income.

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Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

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.

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.
Rebates are recorded on an accrual basis  and included 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 and execution fees 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 11) and  reflect management’s
best assessment of estimated future taxes to be paid. The Company is subject to income taxes in both
the U.S. and numerous foreign jurisdictions. Determining income  tax  expense requires  significant
judgments and estimates.

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.

Deferred income tax assets and liabilities  arise from temporary differences between the tax and
financial statements recognition of the  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

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Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

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.

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.
The Company is not aware of any such changes that would have  a material effect on the Company’s
results of operations, cash flows, or financial position.

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 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.

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Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

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 2015-14 Revenue from Contracts with Customers

(Topic  606): Deferral of the Effective
Date.

ASU 2016-01 Financial Instruments—Overall

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

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

Effective for fiscal years beginning after
December 15, 2017.

ASU 2016-02 Leases  (Topic 842): Requires that, at lease

Effective for fiscal years beginning after

inception, a lessee recognize a right-of-use December 15, 2018.
asset, representing the right to use the
underlying asset for the lease term, and a
lease liability, representing the liability  to
make lease payments, in the statements of
financial condition, among other
requirements.

ASU 2016-07

Investments—Equity Method and Joint
Ventures  (Topic 323): Simplifying the
Transition to the Equity Method of
Accounting.

ASU 2016-08 Revenue from Contracts with Customers

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

ASU 2016-09 Compensation—Stock Compensation

(Topic  718): Improvements to Employee
Share-Based Payment Accounting.

ASU 2016-10 Revenue from Contracts with Customers

(Topic  606): Identifying Performance
Obligations and Licensing.

ASU 2016-12 Revenue from Contracts with Customers

(Topic  606): Narrow-Scope Improvements
and Practical Expedients.

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

Effective for fiscal years beginning after
December 15, 2016.

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

Effective for annual reporting periods
beginning after December 15,  2016.

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.

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Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

2. Significant Accounting Policies (Continued)

Affects

Status

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.

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 2016-17 Consolidation (Topic 810): Interests Held
through Related Parties That Are under
Common Control.

Effective for fiscal years beginning  after
December 15, 2016.

ASU 2016-19 Technical Corrections and  Improvements.

Effective upon  issuance.

ASU 2016-20 Technical Corrections and Improvements  to

Topic 606: Revenue from Contracts with
Customers.

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.

Effective for fiscal years beginning after
December 15, 2019.

Adoption of those ASUs that became  effective  during  2016 and  2017, prior  to  the issuance of the
Company’s consolidated financial statements, did not have a material effect on these financial
statements.

The Company early adopted ASU 2016-09 Compensation—Stock Compensation (Topic 718),
Improvements to Employee Share-Based  Payment Accounting,  as of April 1, 2016.  This early adoption
did not have a material impact on the  Company’s consolidated financial statements.

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:129) a regular review of the risk management  process by executive management as part of its

oversight role;

(cid:129) defined risk management policies and  procedures supported by  a  rigorous analytic framework;

and

(cid:129) 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.

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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. 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  hedging strategies that are based on a defined basket of 15  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. As a result of a periodic assessment, the Company changed the composition of the
GLOBAL by adding the Chinese renminbi (specifically, the offshore currency  known  by  the symbol
CNH), removing the South Korean won  (KRW) and Brazilian  real (BRL)  components, and
realigning the relative weights of the  U.S. dollar (USD)  and Japanese yen (JPY). The  new
composition of the GLOBAL went into effect as  of the  close of business on June  30, 2016.

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,  and futures and  on its borrowings.
These risks are managed through investment policies and by  entering into interest rate futures
contracts.

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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, 2016,  the Company did  not
have  any material concentrations of credit  risk outside the ordinary course of business.

100

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, 2016.

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

16.6%

83.4%

100.0%

67,989,967

341,444,304

409,434,271

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.

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, 2016 and December 31, 2015, 1,000,000,000  shares  of  Class A common stock were
authorized, of which 68,119,412 and 64,121,150  shares have been issued; and  67,984,973 and  63,985,335
shares were outstanding, respectively. Class B common  stock  is comprised  of 100 authorized shares,  of

101

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

4. Equity and Earnings per Share (Continued)

which 100 shares were issued and outstanding as of December 31, 2016  and December 31,  2015,
respectively. In addition, 10,000 shares of preferred stock have been  authorized,  of  which no shares are
issued  or outstanding as of December  31, 2016 and  December 31,  2015, 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, 2016 and December  31,
2015, the unamortized balance of these deferred tax assets was  $273 million and  $288 million,
respectively.

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.

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, 2016 were  $472 million,
$401 million, and $71 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 $116 million  through December  31, 2016 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.

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  2015, IBG, Inc. issued 11,047,295 shares of common stock (with a  fair value  of $306 million)
directly to Holdings in exchange for  an equivalent number of member interests in  IBG LLC.

On July 28, 2016, the Company filed  a Supplemental Prospectus on Form 424B5  (File
Number 333-192275) with the SEC to issue  1,596,200 shares of common stock in exchange  for an
equivalent number of shares of member interests in  IBG  LLC. This issuance of shares  increased  the
Company’s ownership in IBG LLC from 16.2% to 16.6%.

102

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

4. Equity and Earnings per Share (Continued)

As a  consequence of these redemption  transactions, and distribution  of  shares to employees (see
Note 10), IBG, Inc.’s interest in IBG LLC has  increased to  approximately 16.6%, with Holdings  owning
the remaining 83.4% as of December 31, 2016. 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 89.1% as of December  31, 2016.

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,

2016

2015

2014

(in millions, except share or per share amounts)

Basic earnings per share

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

$

84

$

49

$

45

Weighted average shares of common stock outstanding

Class A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

66,013,147
100

61,042,971
100

56,492,281
100

66,013,247

61,043,071

56,492,381

Basic earnings per share . . . . . . . . . . . . . . . . . . . . . . . . .

$

1.28

$

0.80

$

0.79

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,

2016

2015

2014

(in millions, except share or per share amounts)

Diluted earnings per share

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

$

84

$

49

$

45

Weighted average shares of common stock outstanding

Class A

Issued and outstanding . . . . . . . . . . . . . . . . . . . . . . .
Potentially dilutive common shares

66,013,147

61,042,971

56,492,281

Issuable pursuant to employee stock incentive plans
Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,286,166
100

1,466,725
100

1,217,287
100

67,299,413

62,509,796

57,709,668

Diluted earnings per share . . . . . . . . . . . . . . . . . . . . . . . .

$

1.25

$

0.78

$

0.77

103

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

4. Equity and Earnings per Share (Continued)

Member Distributions and Stockholder Dividends

During the three years ended December 31, 2016,  2015, and  2014, IBG  LLC made distributions
totaling $267  million, $267 million, and  $324 million,  to  its members, of which IBG,  Inc.’s proportionate
share was $43 million, $40 million, and $45  million, respectively. The  Company paid quarterly cash
dividends of $0.10 per share of common  stock, totaling $26 million, $25 million, and $23 million during
2016, 2015, and 2014, respectively.

On January 17, 2017, the Company declared  a cash dividend  of $0.10 per common  share, payable on
March 14, 2017 to stockholders of record as of  March 1, 2017.

5. Comprehensive Income

The following table presents comprehensive  income and earnings per share on comprehensive income:

Year-Ended December 31,

2016

2015

2014

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)
30
$

39

80

$

$

$

$

1.21

1.19

$

$

0.64

0.62

$

$

0.52

0.51

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

66,013,247

61,043,071

56,492,381

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

67,299,413

62,509,796

57,709,668

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,  2016 and  December 31, 2015.

104

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

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, 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

Financial Assets At Fair Value as of
December 31, 2015

Level 1

Level 2

Level 3

Total

Securities segregated for regulatory purposes . . . . . . . . . . . . . . . .

$15,214

(in millions)
$—

$— $15,214

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

1,650
1,156
81
527
—
—

3,414

—
—
—
—
3
3

6

—
—
—
—
—
—

—

1,650
1,156
81
527
3
3

3,420

Total financial assets at fair value . . . . . . . . . . . . . . . . . . . . . . . .

$18,628

$ 6

$— $18,634

105

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

Financial Liabilities At Fair Value as of
December 31, 2015

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

$1,565
1,042
1
—

Total financial instruments sold, but not yet purchased,  at fair value .

2,608

$—
—
—
9

9

$— $1,565
1,042
1
9

—
—
—

—

2,617

Total financial liabilities at fair value . . . . . . . . . . . . . . . . . . . . . . . .

$2,608

$ 9

$— $2,617

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, 2016 and  2015, 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, 2016 financial assets included $1 million of Level 3 securities which were
transferred from Level 2 as a result of  a security becoming illiquid.

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:

Equities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fixed income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Year-Ended
December 31,

2016

2015

2014

(in millions)
$254
1
14

$155
—
8

$247
21
(7)

Total trading gains, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$163

$269

$261

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.

106

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

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.

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, 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

$—

107

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, 2015

Carrying
Value

Fair
Value

Level 1

Level  2

Level 3

(in millions)

$ 1,601

$ 1,601

$1,601

$ — $—

6,095
3,924
195
17,050

6,095
3,924
195
17,050

562
5,533
3,924
—
—
195
— 17,050

692
63
28

692
63
31

—
—
—

692
63
31

—
—
—

—
—
—

Total financial assets, not measured at fair value . . . . . .

$29,648

$29,651

$7,134

$22,517

$—

Financial liabilities, not measured at  fair value

Securities loaned . . . . . . . . . . . . . . . . . . . . . . . . . . .
Payables to customer . . . . . . . . . . . . . . . . . . . . . . . .
Payables to brokers, dealers and clearing

organizations . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest payable . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 2,894
37,084

$ 2,894
37,084

$ — $ 2,894
— 37,084

423
3

423
3

—
—

423
3

$—
—

—
—

Total financial liabilities, not measured  at fair  value . . .

$40,404

$40,404

$ — $40,404

$—

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.

108

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, 2016 and December 31, 2015:

December 31, 2016

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 . . . . . . .

$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

$—
—

—

—

—

—

$—

$—

—

—

—

$—

109

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

6. Financial Assets and Financial Liabilities (Continued)

December 31, 2015

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 . . . . . . . .

$ 562(1)
3,924

195

1,156

81

3

Total

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

$5,921

Offsetting of Financial

Liabilities
Securities loaned . . . . .
Financial instruments
sold, but not yet
purchased, at fair
value
Options . . . . . . . . . .
Warrants and discount
. . . . . .

certificates

Currency forward

contracts . . . . . . . .

$2,894

1,042

1

9

Total

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

$3,946

$—
—

—

—

—

—

$—

$—

—

—

—

$—

$ 562
3,924

$ (562)
(3,816)

$ —
108

195

(195)

—

1,156

(1,032)

81

3

(1)

—

$5,921

$(5,606)

124

80

3

$315

$2,894

$(2,773)

$121

1,042

(1,032)

1

9

(1)

—

10

—

9

$3,946

$(3,806)

$140

(1) As of December 31, 2016 and December  31, 2015,  the  Company had  $11.0  billion and $0.6  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, 2016  and 2015.

110

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, 2016 and December 31, 2015:

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

December 31, 2015

Remaining Contractual Maturity

Overnight
and Open

Less than
30 days

30 - 90 Over 90

days

days

Total

(in millions)

Securities Loaned

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate bonds . . . . . . . . . . . . . . . . . . . . . . . . . . .

$2,873
21

Total

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

$2,894

$—
—

$—

$—
—

$—

$— $2,873
21

—

$— $2,894

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 many 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.

111

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, 2016
and  December 31, 2015, approximately  $19.4 billion and $17.0 billion, respectively, of customer margin
loans were outstanding.

The following table summarizes the amounts related to collateralized transactions as of December 31,
2016 and December 31, 2015:

Securities lending transactions . . . . . . . . . . . . . . . . . . . .
Securities purchased under agreements  to  resell

transactions(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer margin assets . . . . . . . . . . . . . . . . . . . . . . . . .

December 31, 2016

December 31, 2015

Permitted
to Repledge

Sold or
Repledged

Permitted
to Repledge

Sold or
Repledged

(in millions)

$13,768

$ 3,621

$12,131

$2,229

11,117
17,773

11,117
7,172

757
14,905

743
6,279

$42,658

$21,910

$27,793

$9,251

(1) As of December 31, 2016, $11.0  billion  or 99% (as of  December  31, 2015, $0.6  billion or 76%) 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, 2016  and December 31,
2015, the majority of the Company’s U.S.  and foreign  government securities owned were pledged to
clearing organizations.

Financial instruments owned and pledged  as collateral, including  amounts pledged  to  affiliates,  where
the counterparty has the right to repledge,  as of December  31, 2016 and December 31,  2015 are
presented in the following table:

Stocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
U.S. and foreign government securities . . . . . . . . . . . . . .

December 31,
2016

December 31,
2015

(in millions)

$1,574
359

$1,933

$ 915
518

$1,433

112

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

8. Short-Term Borrowings

Short-term borrowings consist primarily of collateralized borrowing facilities with clearing  banks  in
multiple currencies that bear interest at variable overnight rates based  on interbank funds rates
prevailing in the respective currencies. In  addition, the Company has available secured and  unsecured
overnight bank loan facilities. All short-term borrowings  outstanding  as of December 31, 2016  and 2015
were either repaid on the next business  day  or  rolled  forward and, accordingly, their carrying  values
approximated fair values.

As of December 31, 2016 and 2015, short-term borrowings  consisted  of:

Overnight borrowing facilities . . . . . . . .

December 31, 2016

December 31, 2015

Principal

(in millions)
$74

$74

Weighted
Average
Rates

1.53%

Principal

(in millions)
$—

$—

Weighted
Average
Rates

0.51%

Interest expense on short term borrowings  for each of the three years ended December 31, 2016,  2015,
and 2014 was $0 million, $0 million, and $1  million, respectively.

9. Other Income

The components of other income for the  years  ended December 31, 2016,  2015, and  2014 were:

Payments for order flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Market data fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Account activity fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk exposure fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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,

2016

2015

2014

(in millions)
$ 17
30
16
21
(18)
(206)
18

$ 25
24
14
6
(5)
(185)
10

$ 14
35
18
19
35
(40)
13

$ 94

$(122) $(111)

Payments for order flow are earned from various options exchanges  based upon  options trading volume
originated by the Operating Companies. Market  data  fees  are  charged  to  customers  based upon market
data services provided and are largely offset  by the  related  cost to obtain the  underlying  market  data
from third party vendors. Risk exposure fees are earned from a small minority  of customer  accounts
with positions on which market risk exceeds  certain thresholds. Account activity  fees  are charged to
customers that generate commissions below the  minimum level in  any  given month. The fee is based on
the difference between the minimum monthly required commission and the actual  commissions
generated by  the customer’s account. Gains and losses on financial instruments, at fair value and  other
investments include realized and unrealized gains and losses  on financial instruments that are  not  held
for the Company’s market making operations or  from securities that are subject to restrictions,  and the
Company’s interests in the earnings of  equity  method investees  and dividends received on  cost-basis
investments.

113

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

10. 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 the three years ended December 31, 2016, 2015, and 2014,
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, 2016, the Company has 4,994 shares of common stock  remaining to be distributed
to former employees under the ROI Unit  Stock  Plan.

2007 Stock Incentive Plan

Under the Company’s 2007 Stock Incentive  Plan (the ‘‘Stock Incentive Plan’’),  up to 30 million shares
of the Company’s common stock may be granted and issued 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.

114

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

10. 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 stock 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 common stock. 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. Shares of  common stock vest, and
become distributable to participants in accordance with the following schedule:

(cid:129) 10% on the first vesting date, which  is on or about May 9 of  each year; and

(cid:129) 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 22,996  shares  have  been granted to the
external directors cumulatively since the plan inception.

Stock Incentive Plan share grants (excluding 21,009  shares issued pursuant  to  the ROI Unit Stock Plan
described above) and the related fair  values since the  plan inception are  presented  in the table below:

Prior periods (since inception) . . . . . . . . . . . . . . . . . . . . .
December 31, 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
December 31, 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
December 31, 2016 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fair Value at
Date of Grant
($ millions)

Shares

19,178,500
1,709,968
1,211,533(1)
1,445,479

23,545,480

$348
49
52
55

$504

(1) Stock Incentive Plan number of granted shares related to 2015 was adjusted by 12,454

additional shares during the year ended  December 31,  2016.

115

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

10. 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 $51 million, $50  million, and $41 million for the years ended  December 31,
2016, 2015, and 2014, respectively. Estimated future  compensation  costs for unvested awards, net  of
credits for cancelled awards, as of December 31, 2016 are $39  million.

The following summarizes the Stock Incentive  Plan and ROI Unit Stock Plan activities from
December 31, 2013 through December 31, 2016:

Stock
Incentive Plan
Shares

Intrinsic Value
of SIP Shares
which Vested
and were Distributed
($ millions)(1)

Balance, December 31, 2013 . . . . . . . . .

11,647,117

Granted . . . . . . . . . . . . . . . . . . . . . . .
Cancelled . . . . . . . . . . . . . . . . . . . . . .
Distributed . . . . . . . . . . . . . . . . . . . . .

1,709,968
(535,085)
(2,445,200)

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

1,445,479
(69,340)
(2,402,062)

Balance, December 31, 2016 . . . . . . . . .

7,912,062

$56

$86

$88

ROI Unit
Stock Plan
Shares

—

—
15,518(2)
(5,904)

9,614

—
—
(3,244)

6,370

—
—
(1,376)

4,994

(1) Intrinsic value of SIP shares distributed represents the compensation value reported to

the participants.

(2) ROI Unit Stock Plan number of  cancelled unearned shares related to prior years was

adjusted by 15,518 shares during the  period

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, 2016, a total of 447,374  shares have been distributed under these post-employment
provisions. These distributions are included in the table above.

116

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

11. Income Taxes

Income tax expense for the three years  ended December 31, 2016, 2015, and 2014  differs  from the U.S.
federal statutory rate primarily due to the taxation  treatment of income attributable to noncontrolling
interests in IBG LLC. 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
partners. 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 book and income  tax return purposes.

For the three years ended December 31, 2016,  2015, and 2014, the provision  for income taxes consisted
of:

Current

Year-Ended
December 31,

2016

2015

2014

(in millions)

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

Federal
$ 1
State and local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . — — —
28
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 4

$ 1

24

34

Total current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

35

28

29

Deferred
Federal
21
State and local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . — — —
(3)
Foreign . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

(3)

30

14

1

Total deferred . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

27

15

18

$62

$43

$47

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,  2016, 2015, and 2014 is set  forth below:

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%
(28.2)% (28.2)% (28.6)%
1.3% 2.6% 2.9%

8.1% 9.4% 9.3%

Year-Ended December 31,

2016

2015

2014

117

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

11. 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,  2016, 2015, and 2014 were as  follows:

December 31,

2016

2015

2014

(in millions)

Deferred tax assets

Arising from the acquisition of interests  in IBG LLC . . . . . .
Deferred compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$273
6
18

$288
5
18

$279
6
8

Total deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

297

311

293

Deferred tax liabilities

Foreign, primarily THE . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other comprehensive income . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total deferred tax liabilities . . . . . . . . . . . . . . . . . . . . . . . . . .

2
—
1

3

3
—
—

3

3
—
—

3

Net deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$294

$308

$290

As of and for the years ended December 31, 2016 and 2015,  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, 2016,  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 2006.

As of December 31, 2016, accumulated  earnings held  by non-U.S. subsidiaries totaled $1.0 billion (as of
December 31, 2015 $1.0 billion). Of this  amount,  approximately  $0.3 billion (as of December 31,  2015
$0.4 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
$0.3 billion as of December 31, 2016 and December 31,  2015, 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.

118

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

11. Income Taxes (Continued)

The remainder of the accumulated earnings are attributable to non-U.S. subsidiaries  that  are not
considered ‘‘pass-through’’ entities for U.S. tax purposes.  The Company’s  U.S. tax basis in the stock  of
most of these entities exceeds its book  basis. Establishing a deferred tax asset  pursuant to ASC
Topic 740 is not permitted as this difference  will not  reverse  in the foreseeable future.  In the  instances
in which the Company’s book basis were to exceed its U.S. tax basis, no deferred  tax liability would  be
established as the Company would consider  the earnings of those entities to be indefinitely reinvested.

12. 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, 2016 and 2015, 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,

2016

2015

(in millions)
$ 16
$ 6
9
14
2
2

22
(9)

13

49
7
(28)

28

27
(17)

10

47
8
(25)

30

Total property, equipment, and intangible assets, net . . . . . . . . . . . . . .

$ 41

$ 40

Depreciation and amortization of $25  million, $22 million, and $20  million, for the three  years  ended
December 31, 2016, 2015, and 2014,  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, $9 million, and $3 million, for
years ended December 31, 2017, 2018, and 2019, respectively.

13. 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

119

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

13. Commitments, Contingencies and  Guarantees (Continued)

and  debt collection efforts, to be approximately $118 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
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,  2016 and 2015, 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, many of which are still  pending. The Litigation was consolidated with the
other  lawsuits filed by Trading Technologies.

The United States Patent and Trademark Office (‘‘USPTO’’) issued decisions instituting Covered
Business Method Review (‘‘CBM Review’’)  on  all of the  asserted patents and  has made  a finding that it
is more likely than not that the patents are invalid. The District  Court  granted the Defendants’ motion
to stay the Litigation pending the CBM Reviews. On February 17, 2017,  the  USPTO issued  two
decisions finding that the claims of one  patent  are  patentable and  the claims of another patent are not
patentable. On February 28, 2017, the USPTO  issued a decision  finding that most  of the claims of
another patent are not patentable and finding three claims of the same patent to be patentable. The
Defendants plan to appeal to the extent any claims 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.

120

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

13. Commitments, Contingencies and  Guarantees (Continued)

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, which  the Company
opposed. The Court has not yet ruled on these motions. We believe  that the proposed amended
complaint, like the original complaint, lacks merit. Further,  even if the complaint ultimately were to
survive a motion to dismiss, 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 $16 million, $14 million  and  $13 million  for the three years ended  December 31, 2016,
2015, and 2014, respectively, and is included  in occupancy, depreciation and amortization expenses in
the consolidated statements of comprehensive income. As of December 31, 2016, the Company’s
minimum annual lease commitments  totaled $49  million, as follows:

Year

(in millions)

2017 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2018 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2019 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2021 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$14
13
4
4
4
10

$49

121

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

13. Commitments, Contingencies and  Guarantees (Continued)

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
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.

14. 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 market making business  principally through its  Timber Hill subsidiaries on 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 our overall currency diversification
strategy, corporate assets and eliminations.

122

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

14. 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, 2016,  2015, and 2014, and  total assets  as of December 31, 2016,  2015,
and  2014:

Year-Ended December 31,

2016

2015

2014

(in millions)

Net revenues
Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,239
190
(33)

$1,097
298
(206)

$ 952
284
(193)

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

$1,396

$1,189

$1,043

Income before income taxes
Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 756
44
(39)

$ 536
130
(208)

$ 589
114
(197)

Total income before income taxes . . . . . . . . . . . . . . . . . .

$ 761

$ 458

$ 506

December 31,

2016

2015

2014

(in millions)

Segment assets
Electronic brokerage . . . . . . . . . . . . . . . . . . . . . . . . .
Market making . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corporate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$50,072
11,765
(7,164)

$44,421
10,825
(6,512)

$38,280
12,172
(7,067)

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$54,673

$48,734

$43,385

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 24 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, 2016,  2015,  and 2014. The geographic  analysis

123

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

14. Segment and Geographic Information (Continued)

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.

Year-Ended December 31,

2016

2015

2014

(in millions)

Net revenues
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International

$1,046
350

$ 832
357

$ 773
270

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

$1,396

$1,189

$1,043

Income before income taxes
United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International

$ 632
129

$ 294
164

$ 425
81

Total income before income taxes . . . . . . . . . . . . . . . . . .

$ 761

$ 458

$ 506

15. Regulatory Requirements

As of December 31, 2016, aggregate  excess regulatory capital for all of the  Operating Companies was
$4.2 billion.

IB LLC, TH LLC and IB Corp are subject to the  Uniform  Net Capital  Rule (Rule 15c3-1) under  the
Exchange Act and 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.  THA  and  IBA are 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

$3,254
306
577
659

$4,796

(in millions)
$294
1
174
96

$565

$2,960
305
403
563

$4,231

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.

124

Interactive Brokers Group, Inc. and Subsidiaries

Notes to Consolidated Financial Statements  (Continued)

15. Regulatory Requirements (Continued)

As of December 31, 2016, all of the regulated Operating  Companies were  in compliance  with their
respective regulatory capital requirements.

16. 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, 2016 and December 31, 2015 were accounts  receivable from directors,
officers and their affiliates of $78 million and $85 million and payables of $468 million and
$698 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.

17. 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 13, no other recordable or disclosable  events occurred.

*****

125

SUPPLEMENTARY DATA

Unaudited Quarterly results

The Company’s unaudited quarterly  results  for 2016 and 2015 reflect the  condensed  consolidated
operating results of IBG, Inc. and its subsidiaries.

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)

126

2015 Quarterly Data

First

Second

Third

Fourth

(in millions)

Revenues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 187
15

$ 405
18

$ 375
16

$ 289
18

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

172

387

359

271

Non-interest expenses

Execution and clearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Employee compensation and benefits . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Income (loss) before income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less net income (loss) attributable to noncontrolling  interests . . . . . . .

55
57
171

283

(111)
(2)
(96)

59
58
30

147

240
19
198

63
56
38

157

202
20
160

54
56
34

144

127
6
104

Net income (loss) available for common  stockholders . . . . . . . . . . . . .

$ (13) $ 23

$ 22

$ 17

Basic earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$(0.22) $0.38

$0.35

$0.26

Diluted earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$(0.22) $0.37

$0.35

$0.25

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 (loss),  net of  tax . . . . . . . . . . . . . . . . . .

$ (13) $ 23

$ 22

$ 17

(1)
—

(1)

4
—

4

(8)
—

(8)

(5)
—

(5)

Comprehensive income (loss) available  for common stockholders . . . .

$ (14) $ 27

$ 14

$ 12

Comprehensive income attributable to  noncontrolling  interests

Net income (loss) attributable to noncontrolling interests . . . . . . . .
Other comprehensive income (loss)—cumulative translation

$ (96) $ 198

$ 160

$ 104

adjustment

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

(9)

24

(44)

(24)

Comprehensive income (loss) attributable  to noncontrolling interests . .

$ (105) $ 222

$ 116

$ 80

127

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, tax 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.

128

Management, including our CEO and  our  CFO, assessed the effectiveness of  IBG, Inc.’s  internal
control over financial reporting as of  December 31, 2016.  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, 2016.

The effectiveness of the Company’s internal control over financial  reporting  as of December 31, 2016,
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, 2016 have
materially affected, or are reasonably  likely to materially  affect,  our internal control over financial
reporting.

129

REPORT OF INDEPENDENT REGISTERED  PUBLIC  ACCOUNTING FIRM

To the Board of Directors and Stockholders  of
Interactive Brokers Group, Inc.
Greenwich, CT

We  have audited the internal control over  financial reporting of  Interactive  Brokers  Group, Inc. and
subsidiaries (the ‘‘Company’’) as of December 31, 2016, based  on  criteria established in Internal
Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations  of  the
Treadway Commission. 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  conducted our audit in accordance  with the standards of  the Public Company Accounting Oversight
Board (United States). 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.

A company’s internal control over financial reporting is a process designed by, or  under the supervision
of, the company’s principal executive  and principal  financial officers, or persons performing similar
functions, and effected by the company’s board of directors,  management, and other personnel  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.

Because of the inherent limitations of internal  control over  financial reporting, including  the possibility
of collusion or improper management override of  controls, material misstatements  due  to  error  or
fraud may not be prevented or detected  on  a timely basis.  Also, projections  of  any evaluation  of the
effectiveness of the internal control over  financial reporting to future  periods  are subject to the  risk
that the controls may become inadequate  because of changes in conditions, or  that  the degree of
compliance with the policies or procedures may deteriorate.

In our opinion, the Company maintained, in all material respects, effective internal  control  over
financial reporting as of December 31, 2016, based  on the  criteria established in Internal Control—
Integrated Framework (2013) issued by the Committee of Sponsoring  Organizations  of  the Treadway
Commission.

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, 2016 and
2015, and the related consolidated statements  of comprehensive  income, cash flows, and change in

130

equity for each of  the three years in  the  period ended  December 31, 2016, of the  Company and our
report dated February 28, 2017 expressed  an unqualified opinion  on those  financial  statements.

/s/ Deloitte & Touche LLP
New York, New York
February 28, 2017

131

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:129) ‘‘Item 1—Election of Directors’’

(cid:129) ‘‘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:129) ‘‘Compensation of Directors’’

(cid:129) ‘‘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:129) ‘‘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:129) ‘‘Item 2—Ratification of Appointment  of  Independent Registered Public Accounting Firm’’

132

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.

133

ITEM 6. 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.

134

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.

135

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 . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensed Statements of Financial Condition as  of December  31, 2016 and 2015 . . . . . . . . .
Condensed Statements of Comprehensive Income for  the Years ended December 31, 2016,

2015, and 2014 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condensed Statements of Cash Flow  for the Years  ended December 31, 2016, 2015,  and 2014
Notes to Condensed Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F-1
F-2

F-3
F-4
F-5

136

REPORT OF INDEPENDENT REGISTERED  PUBLIC  ACCOUNTING FIRM

To the Board of Directors and Stockholders  of
Interactive Brokers Group, Inc.
Greenwich, CT

We  have audited the consolidated financial  statements  of  Interactive  Brokers Group, Inc.  and
subsidiaries (the ‘‘Company’’) as of December 31, 2016 and 2015, and  for each of the  three years in the
period ended December 31, 2016, and  the Company’s internal control  over  financial  reporting as of
December 31, 2016, and have issued our reports thereon dated February 28, 2017; such  reports are
included elsewhere in this Form 10-K.  Our audits also included the financial statement schedules of the
Company listed at Item 15. These condensed financial statement schedules are the responsibility of the
Company’s management. Our responsibility  is to express  an opinion based on  our audits. In our
opinion, such condensed financial statement  schedules,  when considered in relation to the basic
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, 2017

F-1

INTERACTIVE BROKERS GROUP, INC.

(Parent Company Only)

CONDENSED STATEMENTS OF FINANCIAL CONDITION

(in millions,  except share amounts)

December 31,

2016

2015

Assets
Cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investments in subsidiaries, equity basis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ — $
964
297

1
839
317

Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,261

$1,157

Liabilities and Equity
Liabilities:
Payable to affiliates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued expenses and other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 285
2

$ 291
4

287

295

Stockholders’ equity:

Common stock, $0.01 par value per share:
Class A—Authorized—1,000,000,000,  Issued—68,119,412 and  64,121,150 shares,
Outstanding—67,984,973 and 63,985,335 shares as of December 31,  2016 and
2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Class B—Authorized, Issued and Outstanding—100 shares  as of December 31,

2016 and 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional paid-in capital
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive income, net of  income  taxes  of $0 and $0  as of

December 31, 2016 and 2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Treasury stock, at cost, 134,439 and 135,815 shares as of December 31, 2016 and

2015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

—
775
203

(2)

(3)

Total equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

974

1

—
718
144

2

(3)

862

Total liabilities and equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,261

$1,157

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,

2016

2015

2014

Loss before income from subsidiaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Undistributed gains of subsidiaries, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income tax expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ (1) $ — $ —
63
67
117
18
18
32

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 84

$ 49

$ 45

Net income available for common stockholders . . . . . . . . . . . . . . . . . . . . . . . . . .
Cumulative translation adjustment, net  of  tax . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 84
(4)

$ 49
(10)

$ 45
(15)

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

$ 80

$ 39

$ 30

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changes in operating assets and liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net cash 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 . . . . . . . . . . . . . . .

Year-Ended
December 31,

2016

2015

2014

$ 84

$ 49

$ 45

(117)
30
9

6

42

(44)

(5)

(67)
13
9

4

40

(34)

(10)

(63)
22
5

9

45

(39)

(15)

—
1

Net increase in cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents at beginning of  period . . . . . . . . . . . . . . . . . . . . . . . .

(1) —
1
1

Cash and cash equivalents at end of  period . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ — $ 1

$ 1

Supplemental disclosures of cash flow  information

Cash paid for interest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ — $ — $ —

Cash paid for taxes, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Non-cash investing activities:

Non-cash distributions from subsidiaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

(1) $ — $ 6

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, 2016 and 2015, respectively,  there were no receivables from  affiliates.  Dividends
received from IBG LLC for the three  years ended December 31, 2016,  2015, and 2014, were
$43 million, $40 million, and $45 million,  respectively.

As of December 31, 2016 and 2015, respectively,  payable to  affiliates  of $285 million and  $291 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 10 to the consolidated financial  statements.

5. Commitments, Contingencies and  Guarantees

Refer to Note 13 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. No  recordable or  disclosable  events, not otherwise reported  in these
condensed financial statements or the notes thereto, occurred.

****

F-5

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, 2017

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, 2017

/s/ DENIS MENDONCA

Denis Mendonca

Chief Accounting Officer
(Principal Accounting Officer)

February 28, 2017

/s/ LAWRENCE E. HARRIS

Lawrence E. Harris

Director

February 28,  2017

/s/ GARY KATZ

Gary Katz

/s/ RICHARD GATES

Richard Gates

Director

February 28,  2017

Director

February 28,  2017

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.
Canada
Interactive Brokers Canada Inc.
. . . . . . . . . . . . . . . . . . . . .
United Kingdom
Interactive Brokers (U.K.) Limited . . . . . . . . . . . . . . . . . . .
China
Interactive Brokers Hong Kong Limited . . . . . . . . . . . . . . . .
Interactive Brokers Australia Pty Limited . . . . . . . . . . . . . . .
Australia
Interactive Brokers Business Services (Shanghai) Company

Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timber Hill (Europe) AG . . . . . . . . . . . . . . . . . . . . . . . . . .
Timber Hill Australia Pty Limited . . . . . . . . . . . . . . . . . . . .
Timber Hill Canada Company . . . . . . . . . . . . . . . . . . . . . . .
Interactive Brokers Hungary KFT . . . . . . . . . . . . . . . . . . . .
IB Exchange Corp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interactive Brokers (India) Private Limited(3) . . . . . . . . . . .
. . . . . . . . . . . . .
Interactive Brokers Financial Products S.A.
Interactive Brokers Securities Japan,  Inc. . . . . . . . . . . . . . . .
Interactive Brokers Software Services  Estonia OU . . . . . . . .
Interactive Brokers Software Services Russia . . . . . . . . . . . .
Interactive Brokers Software Services (India) Private Limited

China
Switzerland
Australia
Canada
Hungary
Delaware, U.S.A.
India
Luxembourg
Japan
Estonia
Russia
India

(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

Jurisdiction of Organization

Interactive Brokers Corp . . . . . . . . . . . . . . . . . . . . . . . . . .
Covestor, Inc.
Greenwich Advisor Compliance Services Corp . . . . . . . . . .

Connecticut, U.S.A.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Massachusetts, U.S.A.
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 of our reports dated February 28,  2017 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, 2016.

Exhibit 23.1

/s/ Deloitte & Touche LLP
New York, New York
February 28, 2017

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, 2016  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, 2017

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, 2016  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, 2017

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, 2016 (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, 2017

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, 2016 (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, 2017

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 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

Offi  cers and Directors

Thomas Peterff  y
Chairman of the Board of Directors and 
Chief Executive Off icer

Earl H. Nemser
Vice Chairman and Director

Milan Galik
President and Director

Thomas A. Frank
Executive Vice President and 
Chief Information Off icer

Paul J. Brody
Chief Financial Off icer, Treasurer, 
Secretary and Director

Lawrence E. Harris
Lead Independent Director

Richard Gates
Director 

Gary Katz 
Director 

Wayne H. Wagner
Director

Organizational Structure

Public Stockholders

100% economic interest 
16.6% voting interest

Interactive Brokers 
Group, Inc.

Members of 
IBG Holdings LLC

83.4% voting interest

IBG Holdings LLC

16.6% economic interest

83.4% economic interest

IBG LLC

Operating Subsidiaries of IBG LLC

Interactive Brokers Group  
Sales Office Locations

Greenwich, CT

Chicago, IL

San Francisco, CA

West Palm Beach, FL

855-861-6414

Montreal, Canada  
514-847-3431

Zug, Switzerland 
41-41-726-96-89

Mumbai, India 
91-22-61289-836

Hong Kong 
852-3410-7500

Tokyo, Japan 
81-3-4588-9707

London, United Kingdom 
44-207-710-5680

Sydney, Australia 
61-2-8093-7301

Interactive Brokers
www.ibkr.com