Edgar Filing: INNERWORKINGS INC

Filed pursuant to Rule 424(b)(3)

Registration No. 333-198721

PROSPECTUS

4,838,210 Shares

Common Stock

This prospectus relates to resales of shares of common stock previously issued, or to be issued, by us in connection with two recent related acquisitions (the “Acquisitions”). Pursuant to that certain Stock Purchase Agreement, dated as of July 25, 2013 (the “U.S. Purchase Agreement”), by and among InnerWorkings, Inc., a Delaware corporation, and Tomas Baca, Filip Zak and Ed Halla (the “U.S. selling stockholders”), we purchased all of the outstanding shares of Eyelevel, Inc., an Oregon corporation (“Eyelevel U.S.”), in exchange for cash and shares of our common stock. The U.S. selling stockholders are the recipients of common stock previously issued, or to be issued, by us in connection with the U.S. Purchase Agreement. Pursuant to that certain Stock Purchase Agreement, dated as of July 25, 2013 (the “International Purchase Agreement” and together with the U.S. Purchase Agreement, the “Purchase Agreements”), by and among InnerWorkings, Inc. and Tomas Baca and Filip Zak (the “International selling stockholders”), we purchased all of the outstanding shares of capital stock or other equity interests of EYELEVEL s.r.o., a Czech Republic limited liability company (“Eyelevel CZ”), EYELEVEL Solutions Ltd., a United Kingdom limited company (“Eyelevel UK”), EYELEVEL, LLC, a Russian limited liability company (“Eyelevel Russia”), EYELEVEL RETAIL SOLUTIONS CONSULTORIA LTDA, a Brazilian limited liability company (“Eyelevel Brazil”), Taizhou EYELEVEL Store Fixtures Co., Ltd., a Chinese limited liability company (“Eyelevel China”), EYELEVEL Solution Pty Ltd CAN 158 690 432, an Australian proprietary limited company (“Eyelevel Australia”), and EYELEVEL Limited, a Hong Kong company (“Eyelevel Hong Kong,” and together with Eyelevel CZ, Eyelevel UK, Eyelevel Russia, Eyelevel Brazil, Eyelevel China and Eyelevel Australia, the “International Companies” and together with Eyelevel U.S., the “Eyelevel Companies”). The International selling stockholders are the recipients of common stock previously issued, or to be issued, by us in connection with the International Purchase Agreement.

We refer to the U.S. selling stockholders and the International selling stockholders herein collectively as the “selling stockholders.” This prospectus registers up to 4,838,210 shares of common stock on behalf of the selling stockholders, consisting of (i) 666,671 shares of common stock previously issued to the selling stockholders and (ii) up to 4,171,539 shares of common stock that may be issued to the selling stockholders if certain financial milestones are achieved by the Eyelevel Companies during certain measurement periods described herein.

The selling stockholders identified in this prospectus, or their pledgees, donees, transferees or other successors in interest, may offer and sell the shares of common stock being offered by this prospectus from time to time in public or private transactions, or both. These sales may occur at fixed prices, at market prices prevailing at the time of sale, at prices related to prevailing market prices, or at negotiated prices. The selling stockholders may sell shares to or through underwriters, broker-dealers or agents, who may receive compensation in the form of discounts, concessions or commissions from the selling stockholders, the purchasers of the shares, or both. See “Plan of Distribution” for a more complete description of the ways in which the shares may be sold.

We will not receive any proceeds from the sale of the shares by the selling stockholders.

Our common stock is traded on the NASDAQ Global Select Market under the symbol “INWK.” On September 24, 2014, the closing sale price of our common stock on the NASDAQ Global Select Market was $8.20 per share. You are urged to obtain current market quotations for our common stock.

A prospectus supplement may add, update or change information contained in this prospectus. You should carefully read this prospectus, the applicable prospectus supplement and the information incorporated by reference in this prospectus and the applicable prospectus supplement before you make your investment decision.

Investing in our common stock involves certain risks. You should carefully read and consider the section entitled “Risk Factors” on page 4 and the risk factors included in our periodic reports filed with the Securities and Exchange Commission, in any applicable prospectus supplement and in any other documents we file with the Securities and Exchange Commission.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy and adequacy of the disclosures in this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is September 25, 2014

TABLE OF CONTENTS

	Page #

ABOUT THIS PROSPECTUS	2

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS	2

PROSPECTUS SUMMARY	3

RISK FACTORS	4

USE OF PROCEEDS	4

ISSUANCE OF COMMON STOCK TO SELLING STOCKHOLDERS	5

SELLING STOCKHOLDERS	7

PLAN OF DISTRIBUTION	8

LEGAL MATTERS	9

EXPERTS	9

INFORMATION INCORPORATED BY REFERENCE	9

WHERE YOU CAN FIND ADDITIONAL INFORMATION	10

ABOUT THIS PROSPECTUS

We urge you to read carefully this prospectus, together with the information incorporated herein by reference as described under the heading “Where You Can Find Additional Information,” before buying any of the securities being offered.

You should rely only on the information contained or incorporated by reference in this prospectus and the applicable prospectus supplement or in any amendment to this prospectus. Neither we nor the selling stockholders have authorized anyone to provide you with different information, and if anyone provides, or has provided you, with different or inconsistent information, you should not rely on it. The selling stockholders are offering to sell, and seeking offers to buy, shares of our common stock only in jurisdictions where offers and sales are permitted. The information contained in this prospectus, as well as the information filed previously with the Securities and Exchange Commission (the “SEC”) and incorporated herein by reference, is accurate only as of the date of the document containing the information, regardless of the time of delivery of this prospectus, the applicable prospectus supplement or any sale of our common stock.

A prospectus supplement may add to, update or change the information contained in this prospectus. You should read both this prospectus and the applicable prospectus supplement together with additional information described below under the heading “Where You Can Find Additional Information.” In this prospectus, references to the “Company,” “InnerWorkings,” “registrant,” “we,” “us,” and “our” refer to InnerWorkings, Inc. The phrase “this prospectus” refers to this prospectus and the applicable prospectus supplement, unless the context requires otherwise.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and other documents we file with the SEC contain forward-looking statements that are based on current expectations, estimates, forecasts and projections about us, our future performance, the industry in which we operate, our beliefs and our management’s assumptions. In addition, other written or oral statements that constitute forward-looking statements may be made by us or on our behalf. Words such as “expects,” “anticipates,” “targets,” “goals,” “projects,” “intends,” “plans,” “believes,” “seeks,” “estimates,” variations of such words and similar expressions are intended to identify such forward-looking statements. These statements are not guarantees of future performance and involve certain risks and uncertainties that are difficult to predict, including those in certain of our filings with the SEC incorporated by reference herein. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those anticipated, estimated or projected. Given these risks and uncertainties, prospective investors are cautioned not to place undue reliance on such forward-looking statements.

Other risks, uncertainties and factors, including those discussed in our annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, could cause our actual results to differ materially from those projected in any forward-looking statements. Except as required under the federal securities laws and the rules and regulations of the SEC, we do not have any intention or obligation to update publicly any forward-looking statements after the distribution of this prospectus, whether as a result of new information, future events, changes in assumptions or otherwise.

PROSPECTUS SUMMARY

This summary highlights important features of this offering and the information included or incorporated by reference in this prospectus. This summary does not contain all of the information you should consider before investing in our common stock. You should carefully read this prospectus, the applicable prospectus supplement and the information incorporated by reference in this prospectus and the applicable prospectus supplement before you invest in our common stock.

InnerWorkings, Inc.

InnerWorkings is the leading global marketing execution firm for Fortune 500 brands across a wide range of industries. As a comprehensive outsourced enterprise solution, the company leverages proprietary technology, an extensive supplier network and deep domain expertise to streamline the creation, production, and distribution of branded materials, signage and displays, retail experiences, events and promotions, and packaging across every major market worldwide. Companies partner with InnerWorkings to execute faster, better, and at a global scale, while driving unparalleled savings, accountability and brand experiences.

The aggregate purchase price payable to the selling stockholders pursuant to the Purchase Agreements is an amount equal to up to $54,000,000 (the “Aggregate Consideration”). The Aggregate Consideration is comprised of the following:

With respect to the U.S. Purchase Agreement, (i) $4,000,000 in cash paid on July 25, 2013, subject to certain working capital adjustments, and (ii) up to $13,833,333 in shares of our common stock if certain financial milestones are achieved during measurement periods between July 1, 2013 and June 30, 2017 (the “U.S. Aggregate Earn-Out”). On September 4, 2014, 214,579 shares of our common stock were issued to the U.S. selling stockholders, as the applicable financial milestone was achieved by the Eyelevel Companies for the measurement period from July 1, 2013 to June 30, 2014 (the “U.S. Initial Earn-Out”). Up to an additional 1,390,513 shares may be issued to the U.S. selling stockholders if certain financial milestones are achieved by the Eyelevel Companies for the measurement periods from July 1, 2014 through June 30, 2017 (the “U.S. Remaining Earn-Out”).

With respect to the International Purchase Agreement, (i) $7,900,000 in cash paid on July 25, 2013, subject to certain working capital adjustments, and (ii) up to $27,666,667 in shares of our common stock if certain financial milestones are achieved during measurement periods between July 1, 2013 and June 30, 2017 (the “International Aggregate Earn-Out”). On September 4, 2014, 452,092 shares of our common stock were issued to the International selling stockholders, as the applicable financial milestone was achieved by the Eyelevel Companies for the measurement period from July 1, 2013 to June 30, 2014 (the “International Initial Earn-Out”). Up to an additional 2,781,026 shares may be issued to the International selling stockholders if certain financial milestones are achieved by the Eyelevel Companies for the measurement periods from July 1, 2014 through June 30, 2017 (the “International Remaining Earn-Out”).

This prospectus relates to the resales of shares of our common stock previously issued, or to be issued, by us in connection with the Purchase Agreements.

Our principal executive offices are located at 600 West Chicago Avenue, Suite 850, Chicago, Illinois 60654. Our telephone number is (312) 642-3700. Our website is located at www.inwk.com. The information on our website is not part of this prospectus.

The Offering

Common Stock Offered by the Selling Stockholders	4,838,210(1)(2)(3)

Use of Proceeds	We will not receive any proceeds from the sale of shares in this offering by the selling stockholders.

NASDAQ Global Select Market Symbol	INWK

(1)

Includes an aggregate of 666,671 shares of our common stock that were issued to the selling stockholders on September 4, 2014 pursuant to the U.S. Initial Earn-Out and the International Initial Earn-Out. Also includes 4,171,539 shares of our common stock that may be issued pursuant to the U.S. Remaining Earn-Out and the International Remaining Earn-Out. For purposes of this prospectus we have assumed all future payments, which are more fully described under “Issuance of Common Stock to Selling Stockholders,” will be earned in full. The number of shares of our common stock to be issued to the selling stockholders for such future payments has not yet been determined and is therefore estimated herein.

(2)

The maximum U.S. Remaining Earn-Out is $11,888,889 to be paid in shares of our common stock based on the average of the daily closing price per share of our common stock on the NASDAQ Global Select Market for the five trading days immediately preceding the actual date of any earn-out payment. 1,390,513 shares are registered pursuant to the U.S. Remaining Earn-Out, which number of shares was estimated by dividing $11,888,889 by the average closing price of our common stock on the NASDAQ Global Select Market for the five trading days prior to September 8, 2014, which was $8.55.

(3)

The maximum International Remaining Earn-Out is $23,777,777 to be paid in shares of our common stock based on the average of the daily closing price per share of our common stock on the NASDAQ Global Select Market for the five trading days immediately preceding the actual date of any earn-out payment. 2,781,026 shares are registered pursuant to the International Remaining Earn-Out, which number of shares was estimated by dividing $23,777,777 by the average closing price of our common stock on the NASDAQ Global Select Market for the five trading days prior to September 8, 2014, which was $8.55.

RISK FACTORS

You should carefully consider the risks under the caption “Risk Factors” in our filings with the SEC pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), incorporated by reference herein, before making an investment decision. If any of these risks actually occur, there could be a material adverse effect on our business, financial condition, cash flows or results of operations. In this case, the trading price of our common stock could decline, and you may lose all or part of your investment. These are not the only risks we face, and additional risks that are not yet identified or that we currently deem immaterial may also impair our business operations.

USE OF PROCEEDS

The proceeds from the sale of shares of common stock offered pursuant to this prospectus are solely for the account of the selling stockholders. We will not receive any proceeds from the sale of shares by the selling stockholders. The selling stockholders will pay any underwriting discounts and commission and expenses incurred by the selling stockholders for brokerage, accounting, tax or legal services or any other expenses incurred by the selling stockholders in disposing of the shares. We will bear all other costs, fees and expenses incurred in effecting the registration of the shares covered by this prospectus, including, without limitation, all registration and filing fees, NASDAQ listing fees and fees and expenses of our counsel and our accountants.

ISSUANCE OF COMMON STOCK TO SELLING STOCKHOLDERS

The Aggregate Consideration payable to the selling stockholders pursuant to the Purchase Agreements is an amount equal to up to $54,000,000. The Aggregate Consideration is comprised of the following:

With respect to the U.S. Purchase Agreement, (i) $4,000,000 in cash paid on July 25, 2013, subject to certain working capital adjustments, and (ii) up to $13,833,333 in shares of our common stock pursuant to the U.S. Aggregate Earn-Out. On September 4, 2014, 214,579 shares of our common stock were issued to the U.S. selling stockholders pursuant to the U.S. Initial Earn-Out. Up to an additional 1,390,513 shares may be issued to the U.S. selling stockholders pursuant to the U.S. Remaining Earn-Out, as described below.

With respect to the International Purchase Agreement, (i) $7,900,000 in cash paid on July 25, 2013, subject to certain working capital adjustments, and (ii) up to $27,666,667 in shares of our common stock pursuant to the International Aggregate Earn-Out. On September 4, 2014, 452,092 shares of our common stock were issued to the International selling stockholders pursuant to the International Initial Earn-Out. Up to an additional 2,781,026 shares may be issued to the International selling stockholders pursuant to the International Remaining Earn-Out, as described below.

Pursuant to the U.S. Initial Earn-Out, on September 4, 2014, 214,579 shares of our common stock were issued to the U.S. selling stockholders, as the applicable financial milestone was reached for the measurement period from July 1, 2013 to June 30, 2014 (the “First Measurement Period”). Pursuant to the U.S. Remaining Earn-Out, the U.S. selling stockholders will be eligible to receive earn-out payments having an aggregate maximum value of $11,888,889 based on certain financial objectives. These objectives are based on the earnings of the Eyelevel Companies excluding interest, taxes, depreciation and amortization (“EBITDA”). The specific terms of the U.S. Remaining Earn-Out are as follows:

For the period beginning on July 1, 2014 and ending on June 30, 2015 (the “Second Measurement Period”), EBITDA must equal or exceed $5,400,000 in order for the U.S. selling stockholders to be entitled to receive an amount equal to $1,944,444; and

For the period beginning on July 1, 2015 and ending on June 30, 2016 (the “Third Measurement Period”), EBITDA must equal or exceed $5,600,000 in order for the U.S. selling stockholders to be entitled to receive an amount equal to $1,944,444.

In each measurement period, if EBITDA is less than the target EBITDA, but equals or exceeds 85% of the target EBITDA, the U.S. selling stockholders will be entitled to receive an amount equal to the sum of: (A) $486,111 and (B) $1,458,333 times a fraction, (i) the numerator of which is the positive difference between (x) the amount of EBITDA for such measurement period and (y) an amount equal to 85% of the EBITDA target for such measurement period, and (ii) the denominator of which is 15% of the EBITDA target for such measurement period.

To the extent that EBITDA for the measurement periods described above exceeds the target EBITDA (such excess, the “Excess EBITDA”), then such Excess EBITDA will be applied, without duplication, to the calculation of EBITDA for one or more prior measurement periods to the extent that EBITDA for any such prior measurement period is less than the target EBITDA for such measurement period, and the amount of the earn-out payment with respect to such measurement period will be recalculated accordingly.

In addition to the earn-out payments described in the bullet points above, the U.S. Remaining Earn-Out includes an additional payment, to be paid as follows:

If the cumulative EBITDA for the Earn-Out Period equals or exceeds $40,000,000, the U.S. selling stockholders are entitled to receive an amount equal to $8,000,000.

If the cumulative EBITDA for the Earn-Out Period is less than $40,000,000, but equals or exceeds $30,000,000, the U.S. selling stockholders are entitled to receive an amount equal to the sum of: (A) $4,000,000 and (B) $4,000,000 times a fraction (i) the numerator of which is the positive difference between (x) the cumulative EBITDA for the Earn-Out Period and (y) $30,000,000, and (ii) the denominator of which is $10,000,000.

All payments in connection with the U.S. Remaining Earn-Out will be paid in shares of our common stock based on the average of the daily closing price per share of our common stock on the NASDAQ Global Select Market for the five trading days immediately preceding the actual date of any earn-out payment.

Pursuant to the International Initial Earn-Out, on September 4, 2014, 452,092 shares of our common stock were issued to the International selling stockholders, as the applicable financial milestone was reached for the First Measurement Period. Pursuant to the International Remaining Earn-Out, the International selling stockholders will be eligible to receive earn-out payments having an aggregate maximum value of $23,777,777 based on certain financial objectives. These objectives are based on the EBITDA of the Eyelevel Companies. The specific terms of the International Remaining Earn-Out are as follows:

For the Second Measurement Period, EBITDA must equal or exceed $5,400,000 in order for the International selling stockholders to be entitled to receive an amount equal to $3,888,889; and

For the Third Measurement Period, EBITDA must equal or exceed $5,600,000 in order for the International selling stockholders to be entitled to receive an amount equal to $3,888,889.

In each measurement period, if EBITDA is less than the target EBITDA, but equals or exceeds 85% of the target EBITDA, the International selling stockholders will be entitled to receive an amount equal to the sum of: (A) $972,222 and (B) $2,916,667 times a fraction, (i) the numerator of which is the positive difference between (x) the amount of EBITDA for such measurement period and (y) an amount equal to 85% of the EBITDA target for such measurement period, and (ii) the denominator of which is 15% of the EBITDA target for such measurement period.

To the extent that there is Excess EBITDA for the measurement periods described above, then such Excess EBITDA will be applied, without duplication, to the calculation of EBITDA for one or more prior measurement periods to the extent that EBITDA for any such prior measurement period is less than the target EBITDA for such measurement period, and the amount of the earn-out payment with respect to such measurement period will be recalculated accordingly.

In addition to the earn-out payments described in the bullet points above, the International Remaining Earn-Out includes an additional payment, to be paid as follows:

If the cumulative EBITDA for the Earn-Out Period equals or exceeds $40,000,000, the International selling stockholders are entitled to receive an amount equal to $16,000,000.

If the cumulative EBITDA for the Earn-Out Period is less than $40,000,000, but equals or exceeds $30,000,000, the International selling stockholders are entitled to receive an amount equal to the sum of: (A) $8,000,000 and (B) $8,000,000 multiplied by a fraction (i) the numerator of which is the positive difference between (x) the cumulative EBITDA for the Earn-Out Period and (y) $30,000,000, and (ii) the denominator of which is $10,000,000.

All payments in connection with the International Remaining Earn-Out will be paid in shares of our common stock based on the average of the daily closing price per share of our common stock on the NASDAQ Global Select Market for the five trading days immediately preceding the actual date of any earn-out payment.

SELLING STOCKHOLDERS

If certain requirements are satisfied as discussed under “Issuance of Common Stock to Selling Stockholders,” we may in the future issue certain shares of common stock covered in this prospectus to the selling stockholders pursuant to the terms of the Purchase Agreements.

The following table sets forth certain information known to us with respect to beneficial ownership of our common stock as of September 8, 2014 by the selling stockholders, as determined in accordance with Rule 13d-3 of the Exchange Act. In addition to the aggregate of 666,671 shares of our common stock issued on September 4, 2014 in connection with the U.S. Initial Earn-Out and the International Initial Earn-Out, it assumes that the selling stockholders will be issued 4,171,539 shares of our common stock, which is an estimate of the number of shares that may be issued to the selling stockholders in the future pursuant to the U.S. Remaining Earn-Out and the International Remaining Earn-Out, as described in further detail in “Prospectus Summary—The Offering.” The number of shares we are required to issue may be greater or less than the assumed amount depending on (i) the price of our common stock on the dates that we are required to use to determine the number of shares of our common stock to be issued and (ii) whether the selling stockholders are otherwise eligible to receive the shares.

Name of Selling Stockholder	Shares of Common Stock Beneficially Owned Prior to this Offering(1)					Number of Shares of Common Stock Being Offered(2)
	Number		Percentage
Tomas Baca(3)(4)		282,557		*	%		2,020,698
Filip Zak(3)(5)		282,557		*	%		2,020,698
Ed Halla(3)(6)		101,557		*	%		796,814

*Less than 1%

(1)

“Beneficial ownership” means that a person, directly or indirectly, has or shares voting or investment power with respect to a security or has the right to acquire such power within 60 days. The number of shares beneficially owned is determined as of September 8, 2014, and the percentage is based upon 53,811,888 shares of our common stock outstanding as of September 8, 2014.

(2)

The selling stockholders might not sell any or all of the shares offered by this prospectus. Because the selling stockholders may offer all or some of the shares pursuant to this offering, and because there are currently no agreements, arrangements or understandings with respect to the sale of any of the shares, we cannot estimate the number of shares that will be held by the selling stockholders after the completion of this offering.

(3)

The address for the selling stockholders is c/o Tomas Baca, 6040 Cutter Circle, Bldg 3A, Suite 309, Portland, Oregon 97217.

(4)

Includes 282,557 shares of our common stock that were issued to Tomas Baca on September 4, 2014 pursuant to the U.S. Initial Earn-Out and International Initial Earn-Out. Also includes 1,738,141 shares, the maximum number of shares that Mr. Baca can earn based on assumed future aggregate share payments pursuant to the U.S. Remaining Earn-Out and the International Remaining Earn-Out equal to $35,666,666 divided by the average closing price of our common stock on the NASDAQ Global Select Market on the five trading days prior to September 8, 2014, which was $8.55.

(5)

Includes 282,557 shares of our common stock that were issued to Filip Zak on September 4, 2014 pursuant to the U.S. Initial Earn-Out and International Initial Earn-Out. Also includes 1,738,141 shares, the maximum number of shares that Mr. Zak can earn based on assumed future aggregate share payments pursuant to the U.S. Remaining Earn-Out and the International Remaining Earn-Out equal to $35,666,666 divided by the average closing price of our common stock on the NASDAQ Global Select Market on the five trading days prior to September 8, 2014, which was $8.55.

(6)

Includes 101,557 shares of our common stock that were issued to Ed Halla on September 4, 2014 pursuant to the U.S. Initial Earn-Out. Also includes 695,257 shares, the maximum amount of shares that Mr. Halla can earn based on assumed future aggregate share payments pursuant to the U.S. Remaining Earn-Out equal to $11,888,889 divided by the average closing price of our common stock on the NASDAQ Global Select Market on the five trading days prior to September 8, 2014, which was $8.55.

PLAN OF DISTRIBUTION

The selling stockholders and any of their pledgees, assignees and successors-in-interest may, from time to time in one or more transactions on the NASDAQ Global Select Market or any other organized market where our shares of common stock may be traded sell any or all of their shares of our common stock through underwriters, dealers or agents, directly to one or more purchasers or through a combination of any such methods of sale. The selling stockholders may distribute the shares of our common stock from time to time in one or more transactions:

at a fixed price or prices, which may be changed;

at market prices prevailing at the time of sale;

at prices related to such prevailing market prices; or

at negotiated prices.

The selling stockholders may use any one or more of the following methods when selling shares:

ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers;

one or more block trades in which the broker-dealer will attempt to sell the shares as agent or principal of all of the shares held by the selling stockholders;

purchases by a broker-dealer as principal and resale by such broker-dealer for its account;

an exchange distribution in accordance with the rules of the applicable exchange;

privately negotiated transactions;

short sales;

broker-dealers may agree with the selling stockholders to sell a specified number of such shares at a stipulated price per share;

a combination of any such methods of sale; and

any other method permitted pursuant to applicable law.

If the selling stockholders effect such transactions by selling shares of common stock to or through underwriters, broker-dealers or agents, such underwriters, broker-dealers or agents may receive commissions in the form of discounts, concessions or commissions from the selling stockholders or commissions from purchasers of the shares of common stock for whom it may act as agent or to whom they may sell as principal (which discounts, concessions or commissions as to particular underwriters, broker-dealers or agents may be in excess of those customary in the types of transactions involved). In connection with sales of the shares of common stock or otherwise, the selling stockholders may enter into hedging transactions with broker-dealers, which may in turn engage in short sales of the shares of common stock in the course of hedging in positions they assume. The selling stockholders may also sell shares of common stock short and deliver shares of common stock covered by this prospectus to close out short positions and to return borrowed shares in connection with such short sales. The selling stockholders may also loan or pledge shares of common stock to broker-dealers that in turn may sell such shares.

The selling stockholders may pledge or grant a security interest in some or all of the shares of common stock owned by them and, if they default in the performance of their secured obligations, the pledgees or secured parties may offer and sell the shares of common stock from time to time pursuant to this prospectus or any amendment to this prospectus under Rule 424(b)(3) or other applicable provision of the Securities Act of 1933, as amended (the “Securities Act”), amending, if necessary, the list of selling stockholders to include the pledgee, transferee or other successors in interest as selling stockholders under this prospectus. The selling stockholders also may transfer and donate the shares of common stock in other circumstances in which case the transferees, donees, pledgees or other successors in interest will be the selling beneficial owners for purposes of this prospectus.

The selling stockholders and any broker-dealer participating in the distribution of the shares of common stock may be deemed to be “underwriters” within the meaning of the Securities Act, and any commission paid, or any discounts or concessions allowed to, any such broker-dealer may be deemed to be underwriting commissions or discounts under the Securities Act. At the time a particular offering of the shares of common stock is made, a prospectus supplement, if required, will be distributed which will set forth the aggregate amount of shares of common stock being offered and the terms of the offering, including the name or names of any broker-dealers or agents, any discounts, commissions and other terms constituting compensation from the selling stockholders and any discounts, commissions or concessions allowed or reallowed or paid to broker-dealers.

Under the securities laws of some states, the shares of common stock may be sold in such states only through registered or licensed brokers or dealers. In addition, in some states the shares of common stock may not be sold unless such shares have been registered or qualified for sale in such state or an exemption from registration or qualification is available and is complied with.

There can be no assurance that any selling stockholder will sell any or all of the shares of common stock registered pursuant to this prospectus.

The selling stockholders and any other person participating in such distribution will be subject to applicable provisions of the Exchange Act, and the rules and regulations thereunder, including, without limitation, Regulation M of the Exchange Act, which may limit the timing of purchases and sales of any of the shares of common stock by the selling stockholders and any other participating person. Regulation M may also restrict the ability of any person engaged in the distribution of the shares of common stock to engage in market-making activities with respect to the shares of common stock. All of the foregoing may affect the marketability of the shares of common stock and the ability of any person or entity to engage in market-making activities with respect to the shares of common stock.

Once sold under this prospectus the shares of common stock will be freely tradable in the hands of persons other than our affiliates.

LEGAL MATTERS

The validity of the shares of our common stock to be offered for resale by the selling stockholders under this prospectus has been passed upon for us by Winston & Strawn LLP, Chicago, Illinois.

EXPERTS

Ernst & Young LLP, an independent registered public accounting firm, has audited our consolidated financial statements and schedule included in our Annual Report on Form 10-K for the year ended December 31, 2013, as amended, as set forth in their report, which is incorporated by reference in this prospectus and elsewhere in the registration statement. Our financial statements and schedule are incorporated by reference in reliance on Ernst & Young LLP’s report, given on their authority as experts in accounting and auditing.

INFORMATION INCORPORATED BY REFERENCE

The SEC allows us to “incorporate by reference” into this prospectus the information we file with them, which means that we can disclose important information to you by referring you to those documents. Any statement contained or incorporated by reference in this prospectus shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained herein, or in any subsequently filed document which also is incorporated by reference herein, modifies or supersedes such earlier statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus. We incorporate by reference the documents listed below:

our Annual Report on Form 10-K for the fiscal year ended December 31, 2013, as amended by our amended Annual Report on Form 10-K/A for the fiscal year ended December 31, 2013;

our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2014 and June 30, 2014;

our Current Reports on Form 8-K filed with the SEC on February 18, 2014, April 14, 2014, April 22, 2014 and June 13, 2014;

our Definitive Proxy Statement on Schedule 14A filed with the SEC on April 24, 2014; and

the description of our capital stock as set forth in our Registration Statement on Form 8-A/A filed with the SEC on August 11, 2006.

All documents that we file with the SEC pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this prospectus and before all of the securities offered by this prospectus are sold are incorporated by reference in this prospectus from the date of filing of the documents, unless we specifically provide otherwise. Information that we file with the SEC will automatically update and may replace information previously filed with the SEC.

You may obtain, without charge, a copy of any of the documents incorporated by reference in this prospectus, other than exhibits to those documents that are not specifically incorporated by reference into those documents, by writing us at the following address: InnerWorkings, Inc., 600 West Chicago Avenue, Suite 850, Chicago, Illinois 60654, Attention: Investor Relations or telephoning us at: (312) 642-3700. Information contained on our website, http://www.inwk.com, is not a prospectus and does not constitute part of this prospectus.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the SEC under the Exchange Act. You may read and copy any document we file at the SEC’s Public Reference Room located at 100 F Street, N.E., Washington, D.C. 20549. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. Our filings with the SEC also are available from the SEC’s internet site at http://www.sec.gov, which contains reports, proxy and information statements, and other information regarding issuers that file electronically. You may obtain a copy of these filings at no cost by writing us at the following address: InnerWorkings, Inc., 600 West Chicago Avenue, Suite 850, Chicago, Illinois 60654, Attention: Investor Relations or telephoning us at: (312) 642-3700.