Filed Pursuant to Rule 424(b)(3)
Registration No. 333-231639

CALCULATION OF REGISTRATION FEE

Title of Each Class of Securities Offered	Amount to be Registered	Proposed Maximum Offering Price Per Unit	Proposed Maximum Aggregate Offering Price	Amount of Registration Fee
Common stock, $0.01 par value per share	10,000,000	$50.42(1)	$504,200,000.00	$61,109.04

(1) Estimated solely for purposes of calculating the registration fee. In accordance with Rule 457(c) and Rule 457(r) of the Securities Act of 1933, as amended, the prices shown are based on the average of the high and low prices reported for registrant’s Common Stock on the New York Stock Exchange on August 7, 2019.

Prospectus Supplement to Prospectus dated May 21, 2019

10,000,000 Shares

Common Stock

The selling stockholders named in this prospectus supplement are offering 10,000,000 shares of Ceridian HCM Holding Inc. (the “Company”) common stock. We will not receive any proceeds from the sale of shares of common stock to be offered by the selling stockholders.

Our common stock is listed on the New York Stock Exchange (“NYSE”) and the Toronto Stock Exchange (“TSX”) under the symbol “CDAY.” On August 5, 2019, the last sale price of our common stock as reported on the NYSE was $50.73 per share and on August 2, 2019, the last sale price of our common stock as reported on the TSX was $69.49 CAD per share.

We are an “emerging growth company” as defined in Section 2(a) of the Securities Act of 1933, as amended (the “Securities Act”) and, as such, are subject to reduced public company reporting requirements.

Investing in our common stock involves risk. See “Risk Factors” beginning on page S-3. You should also consider the risk factors described in the documents incorporated by reference in this prospectus supplement and the accompanying prospectus.

Neither the SEC nor any state securities commission has approved or disapproved of these securities or passed on the adequacy or accuracy of this prospectus supplement. Any representation to the contrary is a criminal offense.

	Per Share		Total
Public offering price	$	49.75	$	497,500,000
Underwriting discounts and commissions(1)	$	0.48	$	4,800,000
Proceeds to the selling stockholders, before expenses	$	49.27	$	492,700,000

(1) We have agreed to reimburse the underwriter for certain expenses in connection with this offering. See “Underwriting.”

The underwriter expects to deliver the shares of the Company’s common stock to investors on or about August 8, 2019.

Goldman Sachs & Co. LLC

August 6, 2019

TABLE OF CONTENTS

Prospectus Supplement

About This Prospectus Supplement	S-iii
Summary	S-1
The Offering	S-2
Risk Factors	S-3
Cautionary Note Regarding Forward-Looking Statements	S-8
Use of Proceeds	S-10
Market Price of Our Common Stock	S-11
Dividend Policy	S-12
Selling Stockholders	S-13
Material U.S. Federal Income Tax Considerations for Non-U.S. Holders	S-15
Distributions on Common Stock	S-16
Dispositions of Common Stock	S-17
Backup Withholding and Information Reporting	S-17
Other Withholding Taxes	S-18
Underwriting	S-19
Legal Matters	S-30
Experts	S-31
Where You Can Find More Information; Incorporation of Certain Documents by Reference	S-32

Prospectus

	Page
ABOUT THIS PROSPECTUS		1
WHERE YOU CAN FIND MORE INFORMATION; INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE		2
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS		4
THE COMPANY		6
RISK FACTORS		6
USE OF PROCEEDS		6
DESCRIPTION OF CAPITAL STOCK		7
SELLING STOCKHOLDERS		11
PLAN OF DISTRIBUTION		11
LEGAL MATTERS		15
EXPERTS		15

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Prospectus Supplement

You should rely only on the information contained or incorporated by reference in this prospectus supplement, the accompanying prospectus or in any free writing prospectuses related hereto that we have prepared. Neither we, any selling stockholders or the underwriter (or any of our or their respective affiliates) have authorized anyone to provide you with different information and we, the selling stockholders and the underwriter (or any of our or their respective affiliates) take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. You should not assume that the information contained or incorporated by reference in this prospectus supplement, the accompanying prospectus or any free writing prospectus is accurate as of any date other than the respective dates thereof. This prospectus supplement, the accompanying prospectus and any free writing prospectus do not constitute an offer to sell or the solicitation of an offer to buy any securities other than the registered securities to which they relate, nor do this prospectus supplement, the accompanying prospectus and any free writing prospectus constitute an offer to sell or the solicitation of an offer to buy securities in any jurisdiction to any person to whom it is unlawful to make such offer or solicitation in such jurisdiction.

We and our subsidiaries own or have the rights to use various trademarks, trade names and service marks, including the following: Ceridian^®, Dayforce^®, Makes Work Life Better^™, Powerpay^® and various logos used in association with these terms. Solely for convenience, the trademarks, trade names, and service marks and copyrights referred to in this prospectus supplement, the accompanying prospectus and documents incorporated by reference herein and therein without the ^™, ^©, and ^® symbols, but such references are not intended to indicate, in any way, that we, or the applicable owner, will not assert, to the fullest extent under applicable law, our or their, as applicable, rights to these trademarks, trade names, and service marks. Other trademarks, service marks, and trade names appearing in this prospectus supplement, the accompanying prospectus and documents incorporated by reference herein and therein are the property of their respective owners.

You should assume that the information appearing or incorporated by reference in this prospectus supplement, the accompanying prospectus or any free writing prospectus prepared by us or on our behalf is accurate only as of their respective dates or on the date or dates which are specified in such documents, and that any information in documents that we have incorporated by reference is accurate only as of the date of such document incorporated by reference. Our business, financial condition, liquidity, results of operations and prospects may have changed since those dates.

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ABOUT THIS PROSPECTUS SUPPLEMENT

This document consists of two parts. The first part is this prospectus supplement, which describes the specific terms of this offering and also adds to and updates the information contained or incorporated by reference in the accompanying prospectus. The second part is the accompanying prospectus, which contains more general information, some of which may not apply to this offering.

You should read both this prospectus supplement and the accompanying prospectus, together with any documents incorporated by reference herein and therein and the additional information described below under the heading “Where You Can Find More Information; Incorporation of Certain Documents by Reference” in their entirety before making an investment decision. To the extent there is a variation between information contained in this prospectus supplement, on the one hand, and the information contained in the accompanying prospectus, on the other hand, you should rely on the information in this prospectus supplement.

Any statement made in this prospectus supplement or in a document incorporated or deemed to be incorporated by reference in this prospectus supplement will be deemed to be modified or superseded for purposes of this prospectus supplement to the extent that a statement contained in this prospectus supplement or in any other subsequently filed document that is also incorporated or deemed to be incorporated by reference in this prospectus supplement modifies or supersedes that statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus supplement.

The distribution of this prospectus supplement and the accompanying prospectus and the offering of the common stock in certain jurisdictions may be restricted by law. Neither the selling stockholders nor the underwriter are making an offer of the common stock in any jurisdiction where the offer is not permitted. Persons who come into possession of this prospectus supplement and the accompanying prospectus should inform themselves about and observe any such restrictions. This prospectus supplement and the accompanying prospectus do not constitute, and may not be used in connection with, an offer or solicitation by anyone in any jurisdiction in which such offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation.

You should not consider any information in this prospectus supplement, the accompanying prospectus or any free writing prospectus to be investment, legal or tax advice. You should consult your own counsel, accountant and other advisors for legal, tax, business, financial and related advice regarding the purchase of the common stock. None of we, the selling stockholders or the underwriter are making any representation to you regarding the legality of an investment in the common stock by you under applicable investment or similar laws.

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SUMMARY

The items in the following summary are described in more detail later in, or are incorporated by reference into, this prospectus supplement and the accompanying prospectus. This summary provides an overview of selected information and does not contain all of the information you should consider. Therefore, you should also read the more detailed information set out in or incorporated by reference into this prospectus supplement and the accompanying prospectus, including the risk factors, the financial statements and related notes thereto, and the other documents to which this prospectus supplement and the accompanying prospectus refer before making an investment decision. Unless otherwise stated in this prospectus supplement, or as the context otherwise requires, references to “our company,” “we,” “us,” “our,” and “Ceridian” refer to Ceridian HCM Holding Inc. and its direct and indirect subsidiaries on a consolidated basis.

Business Description

Ceridian is a global human capital management (“HCM”) software company. Dayforce, our flagship cloud HCM platform, provides human resources (“HR”), payroll, benefits, workforce management, and talent management functionality. Our platform is used by organizations, regardless of industry or size, to optimize management of the entire employee lifecycle, including attracting, engaging, paying, deploying, and developing their people. Dayforce was built as a single application from the ground up that combines a modern, consumer-grade user experience with proprietary application architecture, including a single employee record and a rules engine spanning all areas of HCM. Our platform is designed to make work life better for our customers and their employees by improving HCM decision-making processes, streamlining workflows, exposing strategic organizational insights, and simplifying legislative compliance. The platform is designed to ease administrative work for both employees and managers, creating opportunities for companies to increase employee engagement. We are a founder-led organization, and our culture combines the agility and innovation of a start-up with a history of deep domain and operational expertise.

Corporate Information

Ceridian was incorporated in Delaware on July 3, 2013. We completed our initial public offering (“IPO”) in April 2018, and our common stock is listed on the NYSE and the TSX under the symbol “CDAY.” Our principal executive offices are located at 3311 East Old Shakopee Road, Minneapolis, Minnesota 55425, and our telephone number is (952) 853-8100. Our corporate website address is www.ceridian.com. Our website and the information contained on, or that can be accessed through, the website is not deemed to be incorporated by reference in, and is not considered part of, this prospectus supplement. You should not rely on any such information in making your decision whether to purchase our common stock.

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THE OFFERING

Common stock offered by the selling stockholders 10,000,000 shares of common stock.

Use of proceeds We will not receive any proceeds from the sale of shares of common stock by the selling stockholders. See “Use of Proceeds.”

Dividend policy We do not anticipate paying any dividends on our common stock for the foreseeable future; however, we may change this policy in the future. See “Dividend Policy.”

Voting rights Upon completion of this offering, our executive officers, directors, and the Sponsors will hold approximately 42.9% of the combined voting power of our outstanding capital stock and will have the ability to influence the outcome of matters submitted to our stockholders for approval. See “Selling Stockholders.”

Risk factors Investing in our common stock involves a high degree of risk. See the “Risk Factors” section beginning on page S-3 of this prospectus supplement, the accompanying prospectus, any free writing prospectus prepared by or on behalf of us and other documents incorporated by reference herein or therein for a discussion of factors you should carefully consider before investing in our common stock.

Listing Our shares of common stock are listed on the NYSE and the TSX under the symbol “CDAY.”

Except as otherwise indicated, the number of shares of our common stock outstanding after this offering is based on 141,942,066 shares outstanding as of June 30, 2019 and:

• excludes (i) an aggregate of 2,500 shares of our common stock issuable upon exercise of outstanding stock options at a weighted average of $20.00 per share, which stock options were granted under our 2007 Ceridian LLC Stock Incentive Plan, (ii)(a) an aggregate of 6,654,690 shares of our common stock issuable upon exercise of outstanding stock options at a weighted average exercise price of $16.94 per share, and (b) an aggregate of 500,000 shares of our common stock issuable upon the vesting of outstanding restricted stock units, which stock options and restricted stock units were granted under our 2013 Ceridian HCM Holding Inc. Stock Incentive Plan, as amended (the “2013 Plan”), (iii) (a) an aggregate of 8,854,242 shares of our common stock issuable upon exercise of outstanding stock options at a weighted average exercise price of $35.68 per share, and (b) an aggregate of 213,031 shares of our common stock issuable upon the vesting of outstanding stock units and (iv) an aggregate of 2,385,373 shares of our common stock that are available for equity awards under our Global Employee Stock Purchase Plan; and

• gives effect to the exchange of 2,323,213.788 exchangeable shares of our subsidiary, Ceridian AcquisitionCo ULC (“Exchangeable Shares”), for 2,323,193 shares of our common stock.

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RISK FACTORS

An investment in our common stock involves a high degree of risk. You should carefully consider the information contained in this prospectus supplement and the accompanying prospectus before making an investment in our common stock. In addition, you should read and consider the risk factors included in the documents incorporated by reference in this prospectus supplement, including our Annual Report on Form 10-K for the year ended December 31, 2018. See “Where You Can Find More Information; Incorporation of Certain Documents by Reference.” If any risks actually occur, our business, financial condition and results of operations may be materially adversely affected. In such an event, the trading price of our common stock could decline and you could lose part or all of your investment.

Risks Related to This Offering and Ownership of Our Common Stock

The price of our common stock may be volatile and you could lose all or part of your investment.

Securities markets worldwide have experienced in the past, and are likely to experience in the future, significant price and volume fluctuations. This market volatility, as well as general economic, market, or political conditions could reduce the market price of our common stock regardless of our results of operations. The trading price of our common stock is likely to be highly volatile and could be subject to wide price fluctuations in response to various factors, including, among other things, the risk factors described herein and other factors beyond our control. Factors affecting the trading price of our common stock could include:

• market conditions in the broader stock market;

• actual or anticipated variations in our quarterly results of operations;

• developments in our industry in general;

• variations in operating results of similar companies;

• introduction of new services by us, our competitors, or our customers;

• issuance of new, negative, or changed securities analysts’ reports or recommendations or estimates;

• investor perceptions of us and the industries in which we or our customers operate;

• sales, or anticipated sales, of our stock, including sales by our officers, directors, and significant stockholders;

• additions or departures of key personnel;

• regulatory or political developments;

• the public’s response to press releases or other public announcements by us or third parties, including our filings with the SEC;

• announcements, media reports or other public forum comments related to litigation, claims or reputational charges against us;

• guidance, if any, that we provide to the public, any changes in this guidance, or our failure to meet this guidance;

• the development and sustainability of an active trading market for our common stock;

• investor perceptions of the investment opportunity associated with our common stock relative to other investment alternatives;

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• other events or factors, including those resulting from system failures and disruptions, earthquakes, hurricanes, war, acts of terrorism, other natural disasters or responses to these events;

• changes in accounting principles;

• share-based compensation expense under applicable accounting standards;

• litigation and governmental investigations; and

• changing economic conditions.

These and other factors may cause the market price and demand for shares of our common stock to fluctuate substantially, which may limit or prevent investors from readily selling their shares of common stock and may otherwise negatively affect the liquidity of our common stock. In addition, in the past, when the market price of a stock has been volatile, holders of that stock sometimes have instituted securities class action litigation against the company that issued the stock. Securities litigation against us, regardless of the merits or outcome, could result in substantial costs and divert the time and attention of our management from our business, which could have a material adverse effect on our business, financial condition, and results of operations.

Future sales of our common stock, or the perception in the public markets that these sales may occur, could cause the market price for our common stock to decline.

Prior to and following the consummation of this offering, there will be 142,176,533 shares of our common stock outstanding, of which 10,000,000 shares are shares that the selling stockholders are selling in this offering. All shares of common stock sold in this offering will be freely transferable without restriction or further registration under the Securities Act. As of June 30, 2019, we also had 32,868,404 registered shares of common stock reserved for issuance under our equity incentive plans of which options to purchase 15,511,432 shares of common stock and 713,031 restricted stock units representing 16,224,463 shares of common stock were outstanding. We cannot predict the effect, if any, that market sales of shares of our common stock or the availability of shares of our common stock for sale will have on the market price of our common stock prevailing from time to time. Sales of substantial amounts of shares of our common stock in the public market, or the perception that those sales will occur, could cause the market price of our common stock to decline. Of the remaining shares of common stock outstanding, 62,720,470 shares will be restricted securities within the meaning of Rule 144 under the Securities Act and subject to certain restrictions on resale following the consummation of this offering. Restricted securities may be sold in the public market only if they are registered under the Securities Act, or are sold pursuant to an exemption from registration such as Rule 144 or Rule 701. We have granted customary demand and piggyback registration rights to the Sponsors and certain of our other stockholders party to the registration rights agreement with us, pursuant to which the selling stockholders named in this prospectus supplement are offering shares of our common stock. Should the Sponsors or any other stockholders further exercise their registration rights, the shares registered would no longer be restricted securities and would be freely tradable in the open market. See “Certain Relationships and Related Party Transactions—Registration Rights Agreement” in our Definitive Proxy Statement on Schedule 14A for our 2019 Annual Meeting of Stockholders as incorporated by reference into this prospectus supplement.

We, our directors, the Sponsors and certain of our significant stockholders have agreed that (subject to certain exceptions), for a period of 30 days from the date of this prospectus supplement, we and they will not, without the prior written consent of the underwriter in this offering, dispose of or

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hedge any shares or any securities convertible into or exchangeable for our common stock. The underwriter, in its sole discretion, may release any of the securities subject to these lock-up agreements at any time, which, in the case of directors, shall be with notice. See “Underwriting.” In addition, the lock-up agreement entered will permit up to 4,840,075 shares of our common stock to be sold by David Ossip under any 10b5-1 plan that may be put in place during the lock-up period. Following the expiration of the applicable lock-up period, all of the issued and outstanding shares of our common stock will be eligible for future sale, subject to the applicable volume, manner of sale, holding period, and other limitations of Rule 144.

Cannae holds approximately 21.6% of our outstanding common stock as of August 2, 2019. On November 7, 2018, Cannae announced that one of its subsidiaries had entered into a three-year margin loan pursuant to which it could borrow up to $300.0 million. The margin loan is guaranteed by Cannae for a period of up to one year and is further secured by a pledge of 25.0 million shares of our common stock beneficially owned by Cannae. The loan requires that a certain loan to value ratio (based on the value of the shares of our common stock pledged to secure the loan) be maintained. In the event that the ratio is not maintained, the borrower must post additional cash collateral and/or elect to repay a portion of the loan. The loan also contains provisions that, subject to their terms, effectively require prepayment in the event of certain customary events of default, including Cannae’s failure to comply with specified financial ratios or the triggering of a requirement of prepayment under any other material indebtedness. The lock-up agreement entered into by Cannae permits the pledge, hypothecation, grant and any related transfer of such shares in connection with the margin loan. In the event that Cannae borrows under the margin loan and there is an event of default, if Cannae fails to pledge additional cash collateral and/or repay a portion of the loan when it is required to do so or if Cannae otherwise fails to comply with the respective terms of the margin loan and the lender accelerates payment of all amounts outstanding under the loan as a result of this non-compliance, then the lender could foreclose on the pledged shares and sell the shares of common stock in the open market, which could cause the market price of our common stock to decline. In addition, certain lenders under the margin loan may elect at any time to hedge their exposure to the shares of common stock in transactions that could directly or indirectly impact the price of our common stock.

Claims for indemnification by our directors and officers may reduce our available funds to satisfy successful third party claims against us and may reduce the amount of money available to us.

Our third amended and restated certificate of incorporation and amended and restated bylaws provide that we will indemnify our directors and officers, in each case, to the fullest extent permitted by Delaware law. Pursuant to our charter, our directors will not be liable to the company or any stockholders for monetary damages for any breach of fiduciary duty, except (i) for acts that breach his or her duty of loyalty to the company or its stockholders, (ii) for acts or omissions without good faith or involving intentional misconduct or knowing violation of the law, (iii) pursuant to Section 174 of the Delaware General Corporation Law (the “DGCL”) or (iv) for any transaction from which the director derived an improper personal benefit. The bylaws also require us, if so requested, to advance expenses that such director or officer incurred in defending or investigating a threatened or pending action, suit or proceeding, provided that such person will return any such advance if it is ultimately determined that such person is not entitled to indemnification by us. Any claims for indemnification by our directors and officers may reduce our available funds to satisfy successful third party claims against us and may reduce the amount of money available to us.

We are party to a voting agreement with our Sponsors, which provides our Sponsors with rights to nominate a number of designees to our Board.

In connection with the IPO, we entered into a voting agreement with our Sponsors. Pursuant to the voting agreement, for so long as THL and Cannae collectively hold 50% or more of the then

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outstanding voting power, then THL and Cannae shall have the power to designate a total of five directors to our board of directors (the “Board”). After THL and Cannae cease to collectively hold 50% or more of the then outstanding voting power, then each of THL and Cannae will be able to in their own right designate four directors, for so long as it holds at least 40% of the then outstanding voting power; three directors, for so long as it holds at least 30% of the then outstanding voting power; two directors, for so long as it holds at least 20% of the then outstanding voting power; and one director, for so long as it holds at least 10% of the then outstanding voting power. As of August 2, 2019, the Sponsors collectively hold less than 50% of the outstanding voting power, and can collectively designate four directors. The voting agreement will terminate as to each Sponsor when the Sponsor is no longer entitled to designate a director to the Board, and will terminate upon the time when neither Sponsor is entitled to designate a director to the Board. Additionally, in the event a lender forecloses on any shares of our common stock pledged in connection with any loan, advances or extensions of credit that Cannae may enter into, it could have an effect on THL and Cannae’s ability to designate directors under the voting agreement.

The voting agreement grants the Sponsors the right to determine the total number of directors during the term of the voting agreement. The Sponsors could use this provision to maintain a majority representation even if they collectively hold less than 50% of the outstanding voting power by decreasing the size of the board. THL and Cannae may have a right to designate a majority of our Board under the present Board composition even if they collectively or individually hold less than 50% of our then outstanding voting power. Finally, pursuant to the voting agreement, for so long as each Sponsor is entitled to designate a director to the Board, the Sponsors will be required to vote all of their shares, and take all other necessary actions, to cause the Board to include the individuals designated as directors by the Sponsors (as applicable). See “Board of Directors and Corporate Governance” of our Definitive Proxy Statement on Schedule 14A for our 2019 Annual Meeting of Stockholders as incorporated by reference into this prospectus supplement. As a result, it is possible that the interests of THL and Cannae may in some circumstances conflict with our interests and the interests of our other stockholders.

Because we do not intend to pay cash dividends in the foreseeable future, you may not receive any return on investment unless you are able to sell your common stock for a price greater than your purchase price.

We have never declared nor paid cash dividends on our capital stock. We currently intend to retain any future earnings to finance the operation and expansion of our business, and we do not expect to declare or to pay any dividends in the foreseeable future. Consequently, stockholders must rely on sales of their common stock after price appreciation, which may never occur, as the only way to realize any future gains on their investment. We do not intend in the foreseeable future to pay any dividends to holders of our common stock. We currently intend to retain our future earnings, if any, for the foreseeable future to repay indebtedness and to support our general corporate purposes. Therefore, you are not likely to receive any dividends on your common stock for the foreseeable future, and the success of an investment in shares of our common stock will depend upon any future appreciation in their value. There is no guarantee that shares of our common stock will appreciate in value or even maintain the price at which investors have purchased their shares. However, the payment of future dividends will be at the discretion of our Board, subject to applicable law, and will depend on, among other things, our earnings, financial condition, capital requirements, level of indebtedness, statutory and contractual restrictions that apply to the payment of dividends, and other considerations that our Board deems relevant. See “Dividend Policy.” As a consequence of these limitations and restrictions, we may not be able to make the payment of dividends on our common stock.

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Anti-takeover protections in our third amended and restated certificate of incorporation, our amended and restated bylaws or our contractual obligations may discourage or prevent a takeover of our company, even if an acquisition would be beneficial to our stockholders.

Provisions contained in our third amended and restated certificate of incorporation and amended and restated bylaws as well as provisions of the DGCL could delay or make it more difficult to remove incumbent directors or could impede a merger, takeover or other business combination involving us or the replacement of our management, or discourage a potential investor from making a tender offer for our common stock, which, under certain circumstances, could reduce the market value of our common stock, even if it would benefit our stockholders.

In addition, our Board has the authority to cause us to issue, without any further vote or action by the stockholders, up to 10,000,000 shares of preferred stock, par value $0.01 per share, in one or more series, to designate the number of shares constituting any series, and to fix the rights, preferences, privileges, and restrictions thereof, including dividend rights, voting rights, rights and terms of redemption, redemption price, or prices and liquidation preferences of such series. The issuance of shares of preferred stock or the adoption of a stockholder rights plan may have the effect of delaying, deferring or preventing a change in control of our company without further action by the stockholders, even where stockholders are offered a premium for their shares.

In addition, under the agreements governing our senior credit facilities, consisting of a $680.0 million term loan debt facility and a $300.0 million revolving credit facility (together, the “Senior Credit Facilities”), a change of control would cause us to be in default. In the event of a change of control default, the administrative agent under our Senior Credit Facilities would have the right (or, at the direction of lenders holding a majority of the loans and commitments under our Senior Credit Facilities, the obligation) to accelerate the outstanding loans and to terminate the commitments under our Senior Credit Facilities, and if so accelerated, we would be required to repay all of our outstanding obligations under our Senior Credit Facilities. In addition, from time to time, we may enter into contracts that contain change of control provisions that limit the value of, or even terminate, the contract upon a change of control. These change of control provisions may discourage a takeover of our company, even if an acquisition would be beneficial to our stockholders.

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

The statements contained in this prospectus supplement, the accompanying prospectus and any documents incorporated by reference herein or therein that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), including statements regarding our expectations, hopes, intentions or strategies regarding the future. Forward-looking statements, including, without limitation, statements concerning the conditions of the human capital management solutions industry and our operations, performance, and financial condition, including, in particular, statements relating to our business, growth strategies, product development efforts, and future expenses. Forward-looking statements can be identified by words such as “anticipates,” “intends,” “plans,” “seeks,” “believes,” “estimates,” “expects,” “assumes,” “projects,” “could,” “may,” “will,” “should,” and similar references to future periods, or by the inclusion of forecasts or projections.

Forward-looking statements are based on our current expectations and assumptions regarding our business, the economy, and other future conditions. Because forward-looking statements relate to the future, by their nature, they are subject to inherent uncertainties, risks, and changes in circumstances that are difficult to predict. As a result, our actual results may differ materially from those contemplated by the forward-looking statements. Important factors that could cause actual results to differ materially from those in the forward-looking statements include regional, national, or global political, economic, business, competitive, market, and regulatory conditions and the following:

• our inability to attain or to maintain profitability;

• significant competition for our solutions;

• our inability to continue to develop or to sell our existing Cloud solutions;

• our inability to manage our growth effectively;

• the risk that we may not be able to successfully migrate our Bureau customers to our Cloud solutions or to offset the decline in Bureau revenue with Cloud revenue;

• the decline or slower than expected development of the market for enterprise cloud computing;

• failure of our efforts to increase use of our Cloud solutions and our other applications may not succeed;

• our failure to provide enhancements and new features and modifications to our solutions;

• failure to comply with the Federal Trade Commission’s ongoing consent order regarding data protection;

• system interruptions or failures, including cyber-security breaches, identity theft, or other disruptions that could compromise our information;

• our failure to comply with applicable privacy, security and data laws, regulations and standards;

• changes in regulations governing privacy concerns and laws or other domestic or foreign data protection regulations;

• our inability to successfully expand our current offerings into new markets or further penetrate existing markets;

• our inability to meet the more complex configuration and integration demands of our large customers;

• the risk of our customers declining to renew their agreements with us or renewing at lower performance fee levels;

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• our failure to manage our technical operations infrastructure;

• our inability to maintain necessary third party relationships, and third party software licenses or errors in the software we license;

• our inability to protect our intellectual property rights, proprietary technology, information, processes, and know-how;

• our failure to keep pace with rapid technological changes and evolving industry standards; or

• changes in laws and regulations related to the Internet or changes in the Internet infrastructure itself.

The risks and uncertainties that forward-looking statements are subject to include other risks detailed in the “Cautionary Note Regarding Forward-Looking Statements” and “Risk Factors” section of our Quarterly Report on Form 10-Q for the quarter ended June 30, 2019, and “Risk Factors” and other sections of our Annual Report on Form 10-K for the year ended December 31, 2018 as incorporated by reference into this prospectus supplement.

Although we have attempted to identify important risk factors, there may be other risk factors not presently known to us or that we presently believe are not material that could cause actual results and developments to differ materially from those made in or suggested by the forward-looking statements contained in this prospectus supplement. If any of these risks materialize, or if any of the above assumptions underlying forward-looking statements prove incorrect, actual results and developments may differ materially from those made in or suggested by the forward-looking statements contained in this prospectus supplement. For the reasons described above, we caution you against relying on any forward-looking statements. Any forward-looking statement made by us in this prospectus supplement speaks only as of the date on which we make it. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update or to revise any forward-looking statement, whether as a result of new information, future developments, or otherwise, except as may be required by law. Comparisons of results for current and any prior periods are not intended to express any future trends or indications of future performance, unless specifically expressed as such, and should be viewed as historical data.

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USE OF PROCEEDS

All shares of our common stock offered by this prospectus supplement will be sold by the selling stockholders. We will not receive any proceeds from the sale of shares by the selling stockholders.

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MARKET PRICE OF OUR COMMON STOCK

Our common stock has traded on the NYSE and the TSX under the symbol “CDAY” since April 26, 2018. Prior to that time, there was no public market for our shares. As of August 2, 2019, there were 123 holders of record of our common stock. The actual number of stockholders is considerably greater than this number of holders of record, and includes stockholders who are beneficial owners but whose shares are held in street name by brokers and other nominees.

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DIVIDEND POLICY

We do not currently intend to pay cash dividends on our common stock in the foreseeable future. However, in the future, subject to the factors described below and our future liquidity and capitalization, we may change this policy and choose to pay dividends.

Our ability to pay dividends is currently restricted by the terms of our Senior Credit Facilities and may be further restricted by any future indebtedness we incur.

We are a holding company that does not conduct any business operations of our own. As a result, our ability to pay cash dividends on our common stock is dependent upon cash dividends and distributions and other transfers from our subsidiaries.

In addition, under Delaware law, our Board may declare dividends only to the extent of our surplus (which is defined as total assets at fair market value minus total liabilities, minus statutory capital) or, if there is no surplus, out of our net profits for the then current and/or immediately preceding fiscal year.

Any future determination to pay dividends will be at the discretion of our Board and will take into account:

• restrictions in our debt instruments, including our Senior Credit Facilities;

• general economic business conditions;

• our earnings, financial condition, and results of operations;

• our capital requirements;

• our prospects;

• legal restrictions; and

• such other factors as our Board may deem relevant.

See “Risk Factors—Risks Related This Offering and Ownership of Our Common Stock—Because we do not intend to pay cash dividends in the foreseeable future, you may not receive any return on investment unless you are able to sell your common stock for a price greater than your purchase price” in this prospectus supplement and “Risk Factors—Risks Related to Our Indebtedness—We are a holding company and rely on dividends, distributions and other payments, advances and transfers of funds from our subsidiaries to meet our obligations,” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources,” incorporated in this prospectus supplement by reference from our Annual Report on Form 10-K.

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SELLING STOCKHOLDERS

The following table shows information regarding the beneficial ownership of our common stock by the selling stockholders (1) immediately prior to this offering and (2) as adjusted to give effect to this offering.

For further information regarding the beneficial ownership of our common stock and material transactions between us and the selling stockholders, see “Security Ownership of Certain Beneficial Owners and Management” and “Certain Relationships and Related Party Transactions” in our Definitive Proxy Statement on Schedule 14A for our 2019 Annual Meeting of Stockholders as incorporated by reference into this prospectus supplement.

Beneficial ownership of shares is determined under rules of the SEC and generally includes any shares over which a person exercises sole or shared voting or investment power. Except as noted by footnote, and subject to community property laws where applicable, we believe based on the information provided to us that the persons and entities named in the table below have sole voting and investment power with respect to all shares of our common stock shown as beneficially owned by them. Percentage of beneficial ownership is based on 142,176,533 shares of common stock outstanding as of August 2, 2019.

	Shares of common stock beneficially owned before this offering					Shares of common stock beneficially owned after this offering
Name and address of beneficial owner	Number of shares		Percentage of shares			Number of shares	Percentage of shares
Affiliates of Thomas H. Lee Partners, L.P.(1)		39,734,691		27.9	%	30,234,691	21.3%
David D. Ossip(2)		5,340,075		3.8	%	4,840,075	3.4%

(1) Includes 11,424,058 shares of common stock held by Thomas H. Lee Equity Fund VI, L.P., 7,735,765 shares of common stock held by Thomas H. Lee Parallel Fund VI, L.P., 1,351,283 shares of common stock held by Thomas H. Lee Parallel (DT) Fund VI, L.P., 58,466 shares of common stock held by Great-West Investors LP, 58,417 shares of common stock held by Putnam Investments Employees’ Securities Company III LLC, 77,566 shares of common stock held by THL Coinvestment Partners, L.P., 24,878 shares of common stock held by THL Operating Partners, LP, 11,564,423 shares of common stock held by THL Equity Fund VI Investors (Ceridian), L.P., 5,172,777 shares of common stock held by THL Equity Fund VI Investors (Ceridian) II, L.P., 202,710 shares of common stock held by THL Equity Fund VI Investors (Ceridian) III, LLC, 289,561 shares of common stock held by THL Equity Fund VI Investors (Ceridian) IV, LLC, 61,740 shares of common stock held by THL Equity Fund VI Investors (Ceridian) V, LLC and 1,713,047 shares of common stock held by THL Equity Fund VI Investors (Ceridian) VI, L.P. THL Equity Advisors VI, LLC is the general partner of Thomas H. Lee Equity Fund VI, L.P., Thomas H. Lee Parallel Fund VI, L.P., and Thomas H. Lee Parallel (DT) Fund VI, L.P. Thomas H. Lee Partners, L.P. is the general partner of THL Coinvestment Partners, L.P. and THL Operating Partners, L.P. Thomas H. Lee Advisors, LLC is attorney in fact for Great-West Investors LP and Putnam Investments LLC, which is the managing member of Putnam Investments Employees’ Securities Company III LLC, with respect to the shares of common stock they hold. THL Equity Advisors VI, LLC is the general partner of THL Equity Fund VI Investors (Ceridian), L.P., THL Equity Fund VI Investors (Ceridian) II, L.P. and THL Equity Fund VI Investors (Ceridian) VI, L.P. THL Equity Advisors VI, LLC is the manager of THL Equity Fund VI Investors (Ceridian) III, LLC, THL Equity Fund VI Investors (Ceridian) IV, LLC and THL Equity Fund VI Investors (Ceridian) V, LLC. The address of Great-West Investors LP is 8515 East Orchard Road, Greenwood Village, Colorado 80111; the address of Putnam Investments Employees’ Securities Company III LLC is c/o Putnam Investment, Inc., 100 Federal Street, Boston, Massachusetts,

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02110; and the address of all other entities referred to above is c/o Thomas H. Lee Partners, L.P., 100 Federal Street, 35th Floor, Boston, Massachusetts 02110.

(2) Consists of 250,928 shares of common stock held by Mr. Ossip and OsFund Inc., of which Mr. Ossip is a beneficial owner, 2,969,917 shares of common stock that are issuable upon exercise of stock options that are currently exercisable or are exercisable within 60 days of August 1, 2019, 250,000 shares of common stock that are issuable pursuant to restricted stock units that are currently vested or will vest within 60 days of August 1, 2019, and 1,869,230 shares of common stock that are issuable upon the exchange of Exchangeable Shares held by Mr. Ossip and Osscer Inc., of which Mr. Ossip is a beneficial owner.

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MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS FOR NON-U.S. HOLDERS

The following is a general discussion of the material U.S. federal income tax consequences to non-U.S. holders (as defined below) of the purchase, ownership, and disposition of our common stock. This discussion does not provide a complete analysis of all potential U.S. federal income tax considerations relating thereto. This description is based on the U.S. Internal Revenue Code of 1986, as amended (the “Code”), existing and proposed U.S. Treasury regulations promulgated thereunder, administrative pronouncements, judicial decisions, and interpretations of the foregoing, all as of the date hereof and all of which are subject to change, possibly with retroactive effect. This discussion is limited to non-U.S. holders who hold shares of our common stock as capital assets within the meaning of Section 1221 of the Code. Moreover, this discussion is for general information only and does not address all of the tax consequences that may be relevant to you in light of your particular circumstances, nor does it discuss special tax provisions, which may apply to you if you are subject to special treatment under U.S. federal income tax laws, such as for certain financial institutions or financial services entities, insurance companies, tax-exempt entities, dealers in securities or currencies, entities that are treated as partnerships for U.S. federal income tax purposes, “controlled foreign corporations,” “passive foreign investment companies,” former U.S. citizens or long-term residents, persons deemed to sell common stock under the constructive sale provisions of the Code, and persons that hold common stock as part of a straddle, hedge, conversion transaction, or other integrated investment. In addition, this summary does not address the Medicare tax on certain investment income or any state, local or foreign taxes or any U.S. federal tax laws other than U.S. federal income tax laws.

You are urged to consult with your own tax advisor concerning the U.S. federal income tax consequences of acquiring, owning, and disposing of our common stock, as well as the application of any state, local, foreign income, and other tax laws.

As used in this section, a “non-U.S. holder” is a beneficial owner of our common stock that is not, for U.S. federal income tax purposes:

• an individual who is a citizen or resident of the United States;

• a corporation (or other entity taxable as a corporation) that is created or organized in or under the laws of the United States, any state thereof or the District of Columbia;

• an estate the income of which is subject to U.S. federal income taxation regardless of its source; or

• a trust if (i) a court within the United States is able to exercise primary supervision over the administration of the trust and one or more U.S. persons have the authority to control all substantial decisions of the trust or (ii) it has a valid election in effect under applicable U.S. Treasury regulations to be treated as a domestic trust.

If you are an individual, you are a resident alien if you are a lawful permanent resident of the United States (e.g., a green card holder) and you may, in many cases, be deemed to be a resident alien, as opposed to a nonresident alien, by virtue of being present in the United States for at least 31 days in the calendar year and for an aggregate of at least 183 days during a three-year period ending in and including the current calendar year. For these purposes, all the days present in the United States in the current year, one-third of the days present in the immediately preceding year, and one-sixth of the days present in the second preceding year are counted. Resident aliens are subject to U.S. federal income tax as if they are U.S. citizens. Such an individual is urged to consult his or her own tax advisor regarding the U.S. federal income tax consequences of the purchase, ownership or disposition of our common stock.

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If a partnership or other entity treated as a pass-through entity for U.S. federal income tax purposes is a beneficial owner of our common stock, the tax treatment of a partner in the partnership or an owner of the other pass-through entity will depend upon the status of the partner or owner and the activities of the partnership or other pass-through entity. Any partnership, partner in such a partnership or owner of another pass-through entity holding shares of our common stock should consult its own tax advisor as to the particular U.S. federal income tax consequences applicable to it.

INVESTORS CONSIDERING THE PURCHASE OF OUR COMMON STOCK SHOULD CONSULT THEIR OWN TAX ADVISORS REGARDING THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AND THE CONSEQUENCES OF OTHER FEDERAL, STATE, LOCAL AND FOREIGN TAX LAWS, AND APPLICABLE TAX TREATIES.

DISTRIBUTIONS ON COMMON STOCK

Although we do not currently anticipate doing so in the foreseeable future (as discussed in the section entitled “—Dividend Policy”), if we do pay distributions on shares of our common stock, such distributions will constitute dividends for U.S. federal income tax purposes to the extent paid from our current or accumulated earnings and profits, as determined under U.S. federal income tax principles. Distributions in excess of our current and accumulated earnings and profits will constitute a return of capital that is applied against and reduces, but not below zero, a non-U.S. holder’s adjusted tax basis in shares of our common stock. Any remaining excess will be treated as gain realized on the sale or other disposition of our common stock. See “—Dispositions of Common Stock.”

Any dividend paid to a non-U.S. holder on our common stock will generally be subject to U.S. federal withholding tax at a 30% rate. The withholding tax might not apply, however, or might apply at a reduced rate, under the terms of an applicable income tax treaty between the United States and the non-U.S. holder’s country of residence. You should consult your own tax advisors regarding your entitlement to benefits under a relevant income tax treaty. Generally, in order for us or our paying agent to withhold tax at a lower treaty rate, a non-U.S. holder must certify its entitlement to treaty benefits. A non-U.S. holder generally can meet this certification requirement by providing an Internal Revenue Service (“IRS”) Form W-8BEN or IRS Form W-8BEN-E (or other applicable form), as applicable, to us or our paying agent. If the non-U.S. holder holds the stock through a financial institution or other agent acting on the holder’s behalf, the holder will be required to provide appropriate documentation to the agent. The holder’s agent will then be required to provide certification to us or our paying agent, either directly or through other intermediaries. A non-U.S. holder that does not timely furnish the required documentation, but that qualifies for a reduced treaty rate, may obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS.

Dividends received by a non-U.S. holder that are effectively connected with a U.S. trade or business conducted by the non-U.S. holder and, if required by an applicable income tax treaty between the United States and the non-U.S. holder’s country of residence, are attributable to a permanent establishment (or, in certain cases involving individual holders, a fixed base) maintained by the non-U.S. holder in the United States, are generally not subject to such withholding tax. To obtain this exemption, a non-U.S. holder must provide us with an IRS Form W-8ECI properly certifying such exemption. Such effectively connected dividends, although not subject to withholding tax, are taxed at the same graduated rates applicable to U.S. persons, net of certain deductions and credits. In addition to the graduated tax described above, such effectively connected dividends received by corporate non-U.S. holders may also be subject to a branch profits tax at a rate of 30% or such lower rate as may be specified by an applicable income tax treaty.

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DISPOSITIONS OF COMMON STOCK

Subject to the discussion below on backup withholding and other withholding requirements, gain realized by a non-U.S. holder on a sale, exchange or other disposition of our common stock generally will not be subject to U.S. federal income or withholding tax, unless:

• the gain (i) is effectively connected with the conduct by the non-U.S. holder of a U.S. trade or business and (ii) if required by an applicable income tax treaty between the United States and the non-U.S. holder’s country of residence, is attributable to a permanent establishment (or, in certain cases involving individual holders, a fixed base) maintained by the non-U.S. holder in the United States (in which case the special rules described below apply);

• the non-U.S. holder is an individual who is present in the United States for 183 or more days in the taxable year of such disposition and certain other conditions are met (in which case the gain would be subject to a flat 30% tax, or such reduced rate as may be specified by an applicable income tax treaty, which may be offset by certain U.S. source capital losses, provided the non-U.S holder has timely filed U.S. federal income tax returns with respect to such losses); or

• we are, or have been, a U.S. real property holding corporation, or a USRPHC, for U.S. federal income tax purposes at any time during the shorter of the five-year period ending on the date of disposition of our common stock and the non-U.S. holder’s holding period for our common stock.

Generally, a corporation is a USRPHC if the fair market value of its “United States real property interests” equals 50% or more of the sum of the fair market value of (a) its worldwide real property interests and (b) its other assets used or held for use in a trade or business. The tax relating to stock in a USRPHC does not apply to a non-U.S. holder whose holdings, actual and constructive, amount to 5% or less of our common stock at all times during the applicable period, provided that our common stock is regularly traded on an established securities market. We believe we have not been and are not currently a USRPHC, and do not anticipate being a USRPHC in the future.

If any gain from the sale, exchange or other disposition of our common stock, (1) is effectively connected with a U.S. trade or business conducted by a non-U.S. holder and (2) if required by an applicable income tax treaty between the United States and the non-U.S. holder’s country of residence, is attributable to a permanent establishment (or, in certain cases involving individuals, a fixed base) maintained by such non-U.S. holder in the United States, then the gain generally will be subject to U.S. federal income tax at the same graduated rates applicable to U.S. persons, net of certain deductions and credits. If the non-U.S. holder is a corporation, under certain circumstances, that portion of its earnings and profits that is effectively connected with its U.S. trade or business, subject to certain adjustments, generally would also be subject to a “branch profits tax.” The branch profits tax rate is generally 30%, although an applicable income tax treaty between the United States and the non-U.S. holder’s country of residence might provide for a lower rate.

BACKUP WITHHOLDING AND INFORMATION REPORTING

Any dividends that are paid to a non-U.S. holder must be reported annually to the IRS and to the non-U.S. holder. Copies of these information returns also may be made available to the tax authorities of the country in which the non-U.S. holder resides under the provisions of various treaties or agreements for the exchange of information. Dividends paid on our common stock and the gross proceeds from a taxable disposition of our common stock may be subject to additional information reporting and may also be subject to U.S. federal backup withholding if such non-U.S. holder fails to

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comply with applicable U.S. information reporting and certification requirements. Provision of any IRS Form W-8 appropriate to the non-U.S. holder’s circumstances will generally satisfy the certification requirements necessary to avoid the additional information reporting and backup withholding.

Backup withholding is not an additional tax. Any amounts so withheld under the backup withholding rules will be refunded by the IRS or credited against the non-U.S. holder’s U.S. federal income tax liability, provided that the required information is timely furnished to the IRS.

OTHER WITHHOLDING TAXES

Provisions commonly referred to as “FATCA” impose withholding of 30% on payments of U.S.-source dividends (including our dividends) and, subject to the proposed Treasury Regulations discussed below, on sales or other proceeds from the disposition of domestic corporate stock (including our stock), paid to “foreign financial institutions” (which is broadly defined for this purpose and in general includes investment vehicles) and certain other non-U.S. entities unless various U.S. information reporting and due diligence requirements (generally relating to ownership by U.S. persons of interests in or accounts with those entities) have been satisfied, or an exemption applies. An intergovernmental agreement between the United States and the entity’s jurisdiction may modify these requirements. If FATCA withholding is imposed, a beneficial owner that is not a foreign financial institution generally will be entitled to a refund of any amounts withheld by filing a U.S. federal income tax return containing the required information (which may entail significant administrative burden). Under the applicable Treasury Regulations and administrative guidance, withholding under FATCA generally applies to payments of dividends on our common stock. While withholding under FATCA would have applied also to payments of gross proceeds from the sale or other disposition of stock on or after January 1, 2019, recently proposed Treasury Regulations eliminate FATCA withholding on payments of gross proceeds entirely. Taxpayers generally may rely on these proposed Treasury Regulations until final Treasury Regulations are issued. Non-U.S. holders should consult their own tax advisors regarding the effects of FATCA on their investment in our common stock.

THE PRECEDING DISCUSSION OF U.S. FEDERAL INCOME TAX CONSIDERATIONS IS FOR GENERAL INFORMATION ONLY. IT IS NOT TAX ADVICE. EACH PROSPECTIVE INVESTOR SHOULD CONSULT ITS OWN TAX ADVISOR REGARDING THE PARTICULAR U.S. FEDERAL, STATE, LOCAL AND FOREIGN TAX CONSEQUENCES OF PURCHASING, HOLDING AND DISPOSING OF OUR COMMON STOCK, INCLUDING THE CONSEQUENCES OF ANY PROPOSED CHANGE IN APPLICABLE LAWS.

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UNDERWRITING

Goldman Sachs & Co. LLC is acting as underwriter of the offering. Subject to the terms and conditions set forth in an underwriting agreement among us, the selling stockholders and the underwriter, the selling stockholders have agreed to sell to the underwriter, and the underwriter has agreed to purchase from the selling stockholders, 10,000,000 shares of common stock.

Subject to the terms and conditions set forth in the underwriting agreement, the underwriter has agreed to purchase all of the shares of common stock sold under the underwriting agreement if any of these shares are purchased.

The offering is being made in the United States. The common shares will be offered in the United States through the underwriter, either directly or indirectly, through its U.S. broker-dealer affiliates or agents. Sales of shares made outside of the United States may be made by affiliates of the underwriter.

The underwriter is offering the shares, subject to prior sale, when, as and if issued to and accepted by it, subject to approval of legal matters by its counsel, including the validity of the shares, and other conditions contained in the underwriting agreement, such as the receipt by the underwriter of officer’s certificates and legal opinions. The underwriter reserves the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

The underwriting fee is equal to the public offering price per share of common stock less the amount paid by the underwriter to the selling stockholders per share of common stock. The underwriting fee is $0.48 per share. The following table shows the per share and total underwriting discounts and commissions to be paid to the underwriter by the selling stockholders.

Paid by the Selling Stockholders

Per Share	$	0.48
Total	$	4,800,000

The underwriter proposes to offer the common shares directly to the public at the offering price set forth on the cover page of this prospectus supplement and to certain dealers at that price less a concession not in excess of $0.48 per share. After the initial offering of the shares to the public, the offering price and other selling terms may be changed by the underwriter.

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We will pay the expenses incurred by the selling stockholders in connection with this offering. We have also agreed to reimburse the underwriter for certain of its expenses in connection with this offering in an amount up to $20,000. The expenses of this offering that are payable by us are estimated to be approximately $0.3 million.

A prospectus in electronic format may be made available on the web sites maintained by the underwriter, or selling group members, if any, participating in the offering. The underwriter may agree to allocate a number of shares to the underwriter and selling group members for sale to their online brokerage account holders. Internet distributions will be allocated by the representatives to the underwriter and selling group members that may make Internet distributions on the same basis as other allocations.

We have agreed not to (i) offer, pledge, announce the intention to sell, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase or otherwise dispose of, directly or indirectly, or file or confidentially submit with the SEC a registration statement under the Securities Act relating to, any shares of our common stock or securities convertible into or exchangeable or exercisable for any shares of our common stock, or publicly disclose the intention to make any offer, sale, pledge, disposition or filing, or (ii) enter into any swap or other arrangement that transfers all or a portion of the economic consequences associated with the ownership of any shares of common stock or any such other securities (regardless of whether any of these transactions are to be settled by the delivery of shares of common stock or such other securities, in cash or otherwise), in each case without the prior written consent of the underwriter in this offering for a period of 30 days after the date of this prospectus supplement, other than the shares of our common stock to be sold hereunder and any shares of our common stock issued upon the exercise of options granted under our existing stock option plans.

Our directors, the selling stockholders and certain of our significant stockholders have entered into lock-up agreements with the underwriter in this offering prior to the commencement of this offering pursuant to which each of these persons or entities, with limited exceptions, for a period of 30 days after the date of this prospectus supplement, may not, without the prior written consent of the underwriter in this offering (1) offer, pledge, announce the intention to sell, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, directly or indirectly, any shares of our common stock or any securities convertible into or exercisable or exchangeable for our common stock (including, without limitation, common stock or such other securities which may be deemed to be beneficially owned by such directors, executive officers, managers and members in accordance with the rules and regulations of the SEC and securities which may be issued upon exercise of a stock option or warrant) or (2) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the common stock or such other securities, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of common stock or such other securities, in cash or otherwise, or (3) make any demand for or exercise any right with respect to the registration of any shares of our common stock or any security convertible into or exercisable or exchangeable for our common stock. The lock-up agreement entered into by Cannae permits the pledge, hypothecation, grant and any related transfer of such shares in connection with the margin loan. In addition, the lock-up agreement entered will permit up to 4,840,075 shares of our common stock to be sold by David Ossip under any 10b5-1 plan that may be put in place during the lock-up period.

We and the selling stockholders have agreed to indemnify the underwriter against certain liabilities, including liabilities under the Securities Act, or to contribute to payments the underwriter may be required to make in respect of those liabilities.

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Our common stock is listed on the NYSE and the TSX under the symbol “CDAY.” Our shares of common stock trade in U.S. dollars on the NYSE and in Canadian dollars on the TSX.

In connection with this offering, the underwriter may engage in stabilizing transactions, which involves making bids for, purchasing and selling shares of common stock in the open market for the purpose of preventing or retarding a decline in the market price of the common stock while this offering is in progress. These stabilizing transactions may include making short sales of the common stock, which involves the sale by the underwriter of a greater number of shares of common stock than they are required to purchase in this offering, and purchasing shares of common stock on the open market to cover positions created by short sales. Short sales may be “covered” shorts, which are short positions in an amount not greater than the underwriter’s option to purchase additional shares referred to above, or may be “naked” shorts, which are short positions in excess of that amount. The underwriter may close out any covered short position either by exercising their option to purchase additional shares, in whole or in part, or by purchasing shares in the open market. In making this determination, the underwriter will consider, among other things, the price of shares available for purchase in the open market compared to the price at which the underwriter may purchase shares through the option to purchase additional shares. A naked short position is more likely to be created if the underwriter is concerned that there may be downward pressure on the price of the common stock in the open market that could adversely affect investors who purchase in this offering. To the extent that the underwriter creates a naked short position, it will purchase shares in the open market to cover the position.

The underwriter has advised us that, pursuant to Regulation M of the Securities Act of 1933, it may also engage in other activities that stabilize, maintain or otherwise affect the price of the common stock, including the imposition of penalty bids. This means that if the representatives of the underwriter purchase common stock in the open market in stabilizing transactions or to cover short sales, the representatives can require the underwriter that sold those shares as part of this offering to repay the underwriting discount received by them.

These activities may have the effect of raising or maintaining the market price of the common stock or preventing or retarding a decline in the market price of the common stock, and, as a result, the price of the common stock may be higher than the price that otherwise might exist in the open market. If the underwriter commences these activities, it may discontinue them at any time. The underwriter may carry out these transactions on the NYSE, the TSX, in the over-the-counter market or otherwise.

Neither we nor the underwriter make any representation or prediction as to the direction or magnitude of any effect that the transactions described above may have on the price of our common stock. In addition, neither we nor the underwriter make any representation that the underwriter will engage in these transactions or that these transactions, once commenced, will not be discontinued without notice.

The underwriter and its affiliates is a full service financial institution engaged in various activities, which may include sales and trading, commercial and investment banking, advisory, investment management, investment research, principal investment, hedging, market making, brokerage and other financial and non-financial activities and services. The underwriter and its affiliates have provided in the past to us and our affiliates, and may provide from time to time in the future certain commercial banking, financial advisory, investment banking and other services for us and such affiliates in the ordinary course of their business, for which the underwriter received and may continue to receive customary fees and commissions. In addition, from time to time, the underwriter and its affiliates may effect transactions for their own account or the account of customers, and hold on behalf of itself or its customers, long or short positions in our debt or equity securities or loans, and may do so in the future. An affiliate of Goldman Sachs & Co. LLC acts as a lender, lead arranger and bookrunner in respect of our Senior Credit Facilities.

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In the ordinary course of its various business activities, the underwriter and its affiliates, officers, directors and employees may purchase, sell or hold a broad array of investments and actively trade securities, derivatives, loans, commodities, currencies, credit default swaps and other financial instruments for their own account and for the accounts of their customers, and such investment and trading activities may involve or relate to assets, securities and/or instruments of the issuer (directly, as collateral securing other obligations or otherwise) and/or persons and entities with relationships with us The underwriter and its affiliates may also communicate independent investment recommendations, market color or trading ideas and/or publish or express independent research views in respect of such assets, securities or instruments and may at any time hold, or recommend to clients that they should acquire, long and/or short positions in such assets, securities and instruments.

Selling Restrictions

Other than in the United States, no action has been taken by us or the underwriter that would permit a public offering of the shares offered by this prospectus supplement in any jurisdiction where action for that purpose is required. The shares offered by this prospectus supplement may not be offered or sold, directly or indirectly, nor may this prospectus supplement or any other offering material or advertisements in connection with the offer and sale of any such shares be distributed or published in any jurisdiction, except under circumstances that will result in compliance with the applicable rules and regulations of that jurisdiction. Persons into whose possession this prospectus supplement comes are advised to inform themselves about and to observe any restrictions relating to the offering and the distribution of this prospectus supplement. This prospectus supplement does not constitute an offer to sell or a solicitation of an offer to buy any shares offered by this prospectus supplement in any jurisdiction in which such an offer or a solicitation is unlawful.

Notice to Prospective Investors in Canada

The shares offered by this prospectus supplement have not been qualified for distribution by prospectus in Canada and may not be offered or sold in Canada during the course of their distribution except pursuant to a Canadian prospectus or prospectus exemption.

The shares may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any purchase of shares by such persons will be deemed to constitute a representation and warranty by such persons that they are purchasing the securities with investment intent and not with a view to distribution. Any resale of the shares must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws. Notice is provided to prospective purchasers in Canada that, unless permitted under applicable securities legislation, a purchaser in Canada of any shares acquired by such purchaser pursuant to this offering must not trade such shares before the date that is four months and a day after the closing date of this offering.

Securities legislation in certain provinces or territories of Canada may provide a purchaser in such jurisdictions with remedies for rescission or damages if this prospectus supplement (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts (NI 33-105), the underwriter is not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

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Notice to Prospective Investors in the European Economic Area

In relation to each Member State of the European Economic Area which has implemented the Prospectus Directive (each, a “Relevant Member State”), with effect from and including the date on which the Prospectus Directive is implemented in that Relevant Member State, no offer of shares may be made to the public in that Relevant Member State other than:

A. to any legal entity which is a qualified investor as defined in the Prospectus Directive;

B. to fewer than 150 natural or legal persons (other than qualified investors as defined in the Prospectus Directive), subject to obtaining the prior consent of the underwriter; or

C. in any other circumstances falling within Article 3(2) of the Prospectus Directive,

provided that no such offer of shares shall require the Company or any underwriter to publish a prospectus pursuant to Article 3 of the Prospectus Directive and each person who initially acquires any shares or to whom any offer is made will be deemed to have represented, acknowledged and agreed to and with the underwriter and the Company that it is a “qualified investor” within the meaning of the law in that Relevant Member State implementing Article 2(1)(e) of the Prospectus Directive.

In the case of any shares being offered to a financial intermediary as that term is used in Article 3(2) of the Prospectus Directive, each such financial intermediary will be deemed to have represented, acknowledged, and agreed that the shares acquired by it in the offer have not been acquired on a non-discretionary basis on behalf of, nor have they been acquired with a view to their offer or resale to, persons in circumstances which may give rise to an offer of any shares to the public other than their offer or resale in a Relevant Member State to qualified investors as so defined or in circumstances in which the prior consent of the representatives has been obtained to each such proposed offer or resale.

For the purposes of this provision, the expression an “offer of shares to the public” in relation to any shares in any Relevant Member State means the communication in any form and by means of sufficient information on the terms of the offer and the shares to be offered so as to enable an investor to decide to purchase shares, as the same may be varied in that Member State by any measure implementing the Prospectus Directive in that Member State, the expression “Prospectus Directive” means Directive 2003/71/EC (as amended, including by Directive 2010/73/EU), and includes any relevant implementing measure in the Relevant Member State.

Notice to Prospective Investors in the United Kingdom

In addition, in the United Kingdom, this document is being distributed only to, and is directed only at, and any offer subsequently made may only be directed at persons who are “qualified investors” (as defined in the Prospectus Directive) (i) who have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Order”) and/or (ii) who are high net worth companies (or persons to whom it may otherwise be lawfully communicated) falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”) or otherwise in circumstances which have not resulted and will not result in an offer to the public of the shares in the United Kingdom within the meaning of the Financial Services and Markets Act 2000.

Any person in the United Kingdom that is not a relevant person should not act or rely on the information included in this document or use it as basis for taking any action. In the United Kingdom, any investment or investment activity that this document relates to may be made or taken exclusively by relevant persons.

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Notice to Prospective Investors in Switzerland

The shares may not be publicly offered in Switzerland and will not be listed on the SIX Swiss Exchange (“SIX”) or on any other stock exchange or regulated trading facility in Switzerland. This document does not constitute a prospectus within the meaning of, and has been prepared without regard to the disclosure standards for issuance prospectuses under art. 652a or art. 1156 of the Swiss Code of Obligations or the disclosure standards for listing prospectuses under art. 27 ff. of the SIX Listing Rules or the listing rules of any other stock exchange or regulated trading facility in Switzerland. Neither this document nor any other offering or marketing material relating to the shares or the offering may be publicly distributed or otherwise made publicly available in Switzerland.

Neither this document nor any other offering or marketing material relating to the offering, the Company, or the shares have been or will be filed with or approved by any Swiss regulatory authority. In particular, this document will not be filed with, and the offer of shares will not be supervised by, the Swiss Financial Market Supervisory Authority FINMA (“FINMA”), and the offer of shares has not been and will not be authorized under the Swiss Federal Act on Collective Investment Schemes (“CISA”). The investor protection afforded to acquirers of interests in collective investment schemes under the CISA does not extend to acquirers of shares.

Notice to Prospective Investors in the Dubai International Financial Centre (“DIFC”)

This document relates to an Exempt Offer in accordance with the Markets Rules 2012 of the Dubai Financial Services Authority (“DFSA”). This document is intended for distribution only to persons of a type specified in the Markets Rules 2012 of the DFSA. It must not be delivered to, or relied on by, any other person. The DFSA has no responsibility for reviewing or verifying any documents in connection with Exempt Offers. The DFSA has not approved this prospectus supplement nor taken steps to verify the information set forth herein and has no responsibility for this document. The securities to which this document relates may be illiquid and/or subject to restrictions on their resale. Prospective purchasers of the securities offered should conduct their own due diligence on the securities. If you do not understand the contents of this document you should consult an authorized financial advisor.

In relation to its use in the DIFC, this document is strictly private and confidential and is being distributed to a limited number of investors and must not be provided to any person other than the original recipient, and may not be reproduced or used for any other purpose. The interests in the securities may not be offered or sold directly or indirectly to the public in the DIFC.

Notice to Prospective Investors in the United Arab Emirates

The shares have not been, and are not being, publicly offered, sold, promoted or advertised in the United Arab Emirates (including the Dubai International Financial Centre) other than in compliance with the laws of the United Arab Emirates (and the Dubai International Financial Centre) governing the issue, offering, and sale of securities. Further, this prospectus supplement does not constitute a public offer of securities in the United Arab Emirates (including the Dubai International Financial Centre) and is not intended to be a public offer. This prospectus supplement has not been approved by or filed with the Central Bank of the United Arab Emirates, the Securities and Commodities Authority or the Dubai Financial Services Authority.

Notice to Prospective Investors in Australia

This prospectus supplement:

• does not constitute a product disclosure document or a prospectus under Chapter 6D.2 of the Corporations Act 2001 (Cth) (the “Corporations Act”);

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• has not been, and will not be, lodged with the Australian Securities and Investments Commission (“ASIC”), as a disclosure document for the purposes of the Corporations Act and does not purport to include the information required of a disclosure document under Chapter 6D.2 of the Corporations Act;

• does not constitute or involve a recommendation to acquire, an offer or invitation for issue or sale, an offer or invitation to arrange the issue or sale, or an issue or sale, of interests to a “retail client” (as defined in section 761G of the Corporations Act and applicable regulations) in Australia; and

• may only be provided in Australia to select investors who are able to demonstrate that they fall within one or more of the categories of investors, or Exempt Investors, available under section 708 of the Corporations Act.

The shares may not be directly or indirectly offered for subscription or purchased or sold, and no invitations to subscribe for or buy the shares may be issued, and no draft or definitive offering memorandum, advertisement or other offering material relating to any shares may be distributed in Australia, except where disclosure to investors is not required under Chapter 6D of the Corporations Act or is otherwise in compliance with all applicable Australian laws and regulations. By submitting an application for the shares, you represent and warrant to us that you are an Exempt Investor.

As any offer of shares under this document will be made without disclosure in Australia under Chapter 6D.2 of the Corporations Act, the offer of those securities for resale in Australia within 12 months may, under section 707 of the Corporations Act, require disclosure to investors under Chapter 6D.2 if none of the exemptions in section 708 applies to that resale. By applying for the shares you undertake to us that you will not, for a period of 12 months from the date of issue of the shares, offer, transfer, assign or otherwise alienate those securities to investors in Australia except in circumstances where disclosure to investors is not required under Chapter 6D.2 of the Corporations Act or where a compliant disclosure document is prepared and lodged with ASIC.

Notice to Prospective Investors in Japan

The shares have not been and will not be registered pursuant to Article 4, Paragraph 1 of the Financial Instruments and Exchange Act. Accordingly, none of the shares nor any interest therein may be offered or sold, directly or indirectly, in Japan or to, or for the benefit of, any “resident” of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or to others for re-offering or resale, directly or indirectly, in Japan or to or for the benefit of a resident of Japan, except pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the Financial Instruments and Exchange Act and any other applicable laws, regulations and ministerial guidelines of Japan in effect at the relevant time.

Notice to Prospective Investors in Hong Kong

The shares have not been offered or sold and will not be offered or sold in Hong Kong, by means of any document, other than (a) to “professional investors” as defined in the Securities and Futures Ordinance (Cap. 571) of Hong Kong and any rules made under that Ordinance; or (b) in other circumstances which do not result in the document being a “prospectus” as defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32) of Hong Kong or which do not constitute an offer to the public within the meaning of that Ordinance. No advertisement, invitation or document relating to the shares has been or may be issued or has been or may be in the possession of any person for the purposes of issue, whether in Hong Kong or elsewhere, which is directed at, or the contents of which are likely to be accessed or read by, the public of Hong Kong (except if permitted

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to do so under the securities laws of Hong Kong) other than with respect to shares which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” as defined in the Securities and Futures Ordinance and any rules made under that Ordinance.

The contents of this document have not been reviewed by any regulatory authority in Hong Kong. You are advised to exercise caution in relation to the offer. If you are in any doubt about any of the contents of this document, you should obtain independent professional advice.

Notice to Prospective Investors in Singapore

This prospectus supplement has not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus supplement and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of shares may not be circulated or distributed, nor may the shares be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor under Section 274 of the Securities and Futures Act, Chapter 289 of Singapore (the “SFA”), (ii) to a relevant person pursuant to Section 275(1), or any person pursuant to Section 275(1A), and in accordance with the conditions specified in Section 275 of the SFA, or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA.

Where the shares are subscribed or purchased under Section 275 of the SFA by a relevant person which is:

(a) a corporation (which is not an accredited investor (as defined in Section 4A of the SFA)) the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an accredited investor; or

(b) a trust (where the trustee is not an accredited investor) whose sole purpose is to hold investments and each beneficiary of the trust is an individual who is an accredited investor, securities (as defined in Section 239(1) of the SFA) of that corporation or the beneficiaries’ rights and interest (howsoever described) in that trust shall not be transferred within six months after that corporation or that trust has acquired the shares pursuant to an offer made under Section 275 of the SFA except:

(a) to an institutional investor or to a relevant person defined in Section 275(2) of the SFA, or to any person arising from an offer referred to in Section 275(1A) or Section 276(4)(i)(B) of the SFA;

(b) where no consideration is or will be given for the transfer;

(c) where the transfer is by operation of law;

(d) as specified in Section 276(7) of the SFA; or

(e) as specified in Regulation 32 of the Securities and Futures (Offers of Investments) (Shares and Debentures) Regulations 2005 of Singapore

Solely for the purposes of its obligations pursuant to Section 309B of the SFA, we have determined, and hereby notify all relevant persons (as defined in the CMP Regulations 2018), that the shares are prescribed capital markets products (as defined in the CMP Regulations 2018) and Ecluded Investment Products (as defined in MAS Notice SFA04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice of Recommendations of Investment Products).

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Notice to Prospective Investors in Bermuda

Shares may be offered or sold in Bermuda only in compliance with the provisions of the Investment Business Act of 2003 of Bermuda which regulates the sale of securities in Bermuda. Additionally, non-Bermudian persons (including companies) may not carry on or engage in any trade or business in Bermuda unless such persons are permitted to do so under applicable Bermuda legislation.

Notice to Prospective Investors in Saudi Arabia

This document may not be distributed in the Kingdom of Saudi Arabia except to such persons as are permitted under the Offers of Securities Regulations as issued by the board of the Saudi Arabian Capital Market Authority (“CMA”) pursuant to resolution number 2-11-2004 dated 4 October 2004 as amended by resolution number 1-28-2008, as amended. The CMA does not make any representation as to the accuracy or completeness of this document and expressly disclaims any liability whatsoever for any loss arising from, or incurred in reliance upon, any part of this document. Prospective purchasers of the securities offered hereby should conduct their own due diligence on the accuracy of the information relating to the securities. If you do not understand the contents of this document, you should consult an authorised financial adviser.

Notice to Prospective Investors in the British Virgin Islands

The shares may be offered to persons located in the British Virgin Islands who are “qualified investors” for the purposes of SIBA. Qualified investors include (i) certain entities which are regulated by the Financial Services Commission in the British Virgin Islands, including banks, insurance companies, licensees under SIBA and public, professional and private mutual funds; (ii) a company, any securities of which are listed on a recognised exchange; and (iii) persons defined as “professional investors” under SIBA, which is any person (a) whose ordinary business involves, whether for that person’s own account or the account of others, the acquisition or disposal of property of the same kind as the property, or a substantial part of the property of the Issuer; or (b) who has signed a declaration that he, whether individually or jointly with his spouse, has net worth in excess of US$1,000,000 and that he consents to being treated as a professional investor.

Notice to Prospective Investors in China

This prospectus supplement does not constitute a public offer of shares, whether by sale or subscription, in the People’s Republic of China (the “PRC”). The shares are not being offered or sold directly or indirectly in the PRC to or for the benefit of, legal or natural persons of the PRC.

Further, no legal or natural persons of the PRC may directly or indirectly purchase any of the shares or any beneficial interest therein without obtaining all prior PRC’s governmental approvals that are required, whether statutorily or otherwise. Persons who come into possession of this document are required by the issuer and its representatives to observe these restrictions.

Notice to Prospective Investors in Korea

The shares have not been and will not be registered under the Financial Investments Services and Capital Markets Act of Korea and the decrees and regulations thereunder (the “FSCMA”), and the shares have been and will be offered in Korea as a private placement under the FSCMA. None of the shares may be offered, sold or delivered directly or indirectly, or offered or sold to any person for re-offering or resale, directly or indirectly, in Korea or to any resident of Korea except pursuant to the applicable laws and regulations of Korea, including the FSCMA and the Foreign Exchange Transaction Law of Korea and the decrees and regulations thereunder (the “FETL”). The shares have not been listed on any of securities exchanges in the world including, without limitation, the Korea Exchange in

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Korea. Furthermore, the purchaser of the shares shall comply with all applicable regulatory requirements (including but not limited to requirements under the FETL) in connection with the purchase of the shares. By the purchase of the shares, the relevant stockholder thereof will be deemed to represent and warrant that if it is in Korea or is a resident of Korea, it purchased the shares pursuant to the applicable laws and regulations of Korea.

Notice to Prospective Investors in Malaysia

No prospectus or other offering material or document in connection with the offer and sale of the shares has been or will be registered with the Securities Commission of Malaysia (“Malaysia Commission”) for the Malaysia Commission’s approval pursuant to the Capital Markets and Services Act 2007. Accordingly, this prospectus supplement and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the shares may not be circulated or distributed, nor may the shares be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Malaysia other than (i) a closed end fund approved by the Malaysia Commission; (ii) a holder of a Capital Markets Services Licence; (iii) a person who acquires the shares, as principal, if the offer is on terms that the shares may only be acquired at a consideration of not less than RM250,000 (or its equivalent in foreign currencies) for each transaction; (iv) an individual whose total net personal assets or total net joint assets with his or her spouse exceeds RM3 million (or its equivalent in foreign currencies), excluding the value of the primary residence of the individual; (v) an individual who has a gross annual income exceeding RM300,000 (or its equivalent in foreign currencies) per annum in the preceding twelve months; (vi) an individual who, jointly with his or her spouse, has a gross annual income of RM400,000 (or its equivalent in foreign currencies), per annum in the preceding twelve months; (vii) a corporation with total net assets exceeding RM10 million (or its equivalent in a foreign currencies) based on the last audited accounts; (viii) a partnership with total net assets exceeding RM10 million (or its equivalent in foreign currencies); (ix) a bank licensee or insurance licensee as defined in the Labuan Financial Services and Securities Act 2010; (x) an Islamic bank licensee or takaful licensee as defined in the Labuan Financial Services and Securities Act 2010; and (xi) any other person as may be specified by the Malaysia Commission; provided that, in the each of the preceding categories (i) to (xi), the distribution of the shares is made by a holder of a Capital Markets Services Licence who carries on the business of dealing in securities. The distribution in Malaysia of this prospectus supplement is subject to Malaysian laws. This prospectus supplement does not constitute and may not be used for the purpose of public offering or an issue, offer for subscription or purchase, invitation to subscribe for or purchase any securities requiring the registration of a prospectus with the Malaysia Commission under the Capital Markets and Services Act 2007.

Notice to Prospective Investors in Taiwan

The shares have not been and will not be registered with the Financial Supervisory Commission of Taiwan pursuant to relevant securities laws and regulations and may not be sold, issued or offered within Taiwan through a public offering or in circumstances which constitutes an offer within the meaning of the Securities and Exchange Act of Taiwan that requires a registration or approval of the Financial Supervisory Commission of Taiwan. No person or entity in Taiwan has been authorised to offer, sell, give advice regarding, or otherwise, intermediate the offering and sale of the shares in Taiwan.

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Notice to Prospective Investors in South Africa

Due to restrictions under the securities laws of South Africa, the shares are not offered, and the offer shall not be transferred, sold, renounced or delivered, in South Africa or to a person with an address in South Africa, unless one or other of the following exemptions applies:

(i) the offer, transfer, sale, renunciation or delivery is to:

(a) persons whose ordinary business is to deal in securities, as principal or agent;

(b) the South African Public Investment Corporation;

(c) persons or entities regulated by the Reserve Bank of South Africa;

(d) authorized financial service providers under South African law;

(e) financial institutions recognized as such under South African law;

(f) a wholly-owned subsidiary of any person or entity contemplated in (c), (d) or (e), acting as agent in the capacity of an authorized portfolio manager for a pension fund or collective investment scheme (in each case duly registered as such under South African law); or

(g) any combination of the person in (a) to (f); or

(ii) the total contemplated acquisition cost of the securities, for any single addressee acting as principal is equal to or greater than ZAR 1,000,000.

No “offer to the public” (as such term is defined in the South African Companies Act, No. 71 of 2008 (as amended or re-enacted) (the “South African Companies Act”)) in South Africa is being made in connection with the issue of the shares. Accordingly, this document does not, nor is it intended to, constitute a “registered prospectus” (as that term is defined in the South African Companies Act) prepared and registered under the South African Companies Act and has not been approved by, and/or filed with, the South African Companies and Intellectual Property Commission or any other regulatory authority in South Africa. Any issue or offering of the shares in South Africa constitutes an offer of the shares in South Africa for subscription or sale in South Africa only to persons who fall within the exemption from “offers to the public” set out in section 96(1)(a) of the South African Companies Act. Accordingly, this document must not be acted on or relied on by persons in South Africa who do not fall within section 96(1)(a) of the South African Companies Act (such persons being referred to as “SA Relevant Persons”). Any investment or investment activity to which this document relates is available in South Africa only to SA Relevant Persons and will be engaged in South Africa only with SA relevant persons.

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LEGAL MATTERS

Weil, Gotshal & Manges LLP, New York, New York, has passed upon the validity of the common stock offered hereby on behalf of us. The validity of the shares of common stock offered hereby will be passed upon on behalf of the underwriter by Latham & Watkins LLP, New York, New York.

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EXPERTS

The consolidated financial statements of Ceridian HCM Holding Inc. as of December 31, 2018 and 2017 and for each of the years in the three-year period ended December 31, 2018 have been incorporated by reference herein and in the registration statement in reliance upon the reports of KPMG LLP, an independent registered public accounting firm, incorporated by reference herein, and upon the authority of said firm as experts in accounting and auditing.

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WHERE YOU CAN FIND MORE INFORMATION;

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

We file annual, quarterly, and current reports, proxy statements, and other information with the SEC. The SEC maintains an Internet site that contains our reports, proxy statements, and other information regarding us at http://www.sec.gov. Our SEC filings are also available free of charge at our website (www.ceridian.com). However, except for our filings with the SEC that are incorporated by reference into this prospectus supplement, the information on our website is not incorporated by reference into this prospectus supplement.

The SEC allows “incorporation by reference” into this prospectus supplement of information that we file with the SEC. This permits us to disclose important information to you by referencing these filed documents. Any information referenced this way is considered to be a part of this prospectus supplement and any information filed by us with the SEC subsequent to the date of this prospectus supplement automatically will be deemed to update and supersede this information. We incorporate by reference the following documents which we have filed with the SEC (excluding any documents or portions of such documents that have been “furnished” but not “filed” for purposes of the Exchange Act):

• our Annual Report on Form 10-K for the year ended December 31, 2018, which we filed with the SEC on February  28, 2019, as revised by our Current Report on Form 8-K filed on May 21, 2019, which revised Items 6, 7 and 8 of the Form 10-K;

• our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2019 and June 30, 2019, which we filed with the SEC on May  1, 2019 and July 30, 2019;

• our Current Reports on Form 8-K, which we filed with the SEC on February 6, 2019 (with respect to item 5.02 only), February  15, 2019, March 15, 2019, April  9, 2019, May  1, 2019 (with respect to item 5.02 only), May  2, 2019, May 21, 2019 and August 2, 2019;

• the information specifically incorporated by reference into our Annual Report on Form 10-K for the year ended December 31, 2018 from our Definitive Proxy Statement on Schedule  14A for our 2019 Annual Meeting of Stockholders, filed with the SEC on March  22, 2019 and additional materials filed on April 9, 2019; and

• the description of our capital stock contained or incorporated by reference in our registration statement on Form 8-A, as filed on April 24, 2018, and any amendments or reports filed for the purpose of updating such description.

We incorporate by reference any filings made with the SEC in accordance with Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act on or after the date of this prospectus supplement and before the date all of the securities offered hereby are sold or the offering is otherwise terminated, with the exception of any information furnished under Item 2.02 and Item 7.01 (including any financial statements or exhibits relating thereto furnished pursuant to Item 9.01) of Form 8-K, which is not deemed filed and which is not incorporated by reference herein. Any such filings shall be deemed to be incorporated by reference and to be a part of this prospectus supplement from the respective dates of filing of those documents.

Any statement contained in a document incorporated or deemed to be incorporated by reference in this prospectus supplement will be deemed to be modified or superseded to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be incorporated by reference in this prospectus supplement modifies or supersedes that statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus supplement.

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We will provide to each person, including any beneficial owner, to whom a prospectus supplement is delivered, without charge, upon written or oral request, a copy of any or all of the documents that are incorporated by reference into this prospectus supplement but not delivered with this prospectus supplement, excluding any exhibits to those documents unless the exhibit is specifically incorporated by reference as an exhibit in this prospectus supplement. You should direct requests for documents to:

Ceridian HCM Holding Inc.

Investor Relations

3311 East Old Shakopee Road

Minneapolis, Minnesota 55425

(952) 853-8100

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PROSPECTUS

Common Stock

This prospectus relates solely to sales of common stock of Ceridian HCM Holding Inc. (the “Company”) by selling stockholders. The selling stockholders, who will be named in a prospectus supplement, may offer and sell shares of our common stock from time to time in amounts, at prices, and on terms that will be determined at the time of any such offering. We will not receive any proceeds from the sale of shares of common stock to be offered by the selling stockholders.

This prospectus describes some of the general terms that may apply to our common stock. Each time any shares of common stock are offered pursuant to this prospectus, we will provide a prospectus supplement and attach it to this prospectus. The prospectus supplement will contain more specific information about the offering, including the number of shares of our common stock to be sold by the selling stockholders. The prospectus supplement may also add, update, or change information contained in this prospectus. You should read this prospectus and the accompanying prospectus supplement, as well as the documents incorporated by reference herein or therein, carefully before you make your investment decision.

This prospectus may not be used to offer and sell shares of our common stock unless accompanied by a prospectus supplement or a free writing prospectus.

The shares of our common stock may be sold at fixed prices, prevailing market prices at the times of sale, prices related to the prevailing market prices, varying prices determined at the times of sale or negotiated prices. The shares of our common stock offered by this prospectus and the accompanying prospectus supplement may be offered by the selling stockholders directly to investors or to or through underwriters, dealers, or other agents. The prospectus supplement for each offering will describe in detail the plan of distribution for that offering and will set forth the names of any underwriters, dealers, or agents involved in the offering and any applicable fees, commissions, or discount arrangements.

Our common stock is listed on the New York Stock Exchange (“NYSE”) and the Toronto Stock Exchange (“TSX”) under the symbol “CDAY.”

Investing in our common stock involves risk. See “Risk Factors” on page 6 to read about factors you should consider before buying shares of our common stock.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus or the accompanying prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is May 21, 2019.

TABLE OF CONTENTS

	Page
ABOUT THIS PROSPECTUS		1
WHERE YOU CAN FIND MORE INFORMATION; INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE		2
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS		4
THE COMPANY		6
RISK FACTORS		6
USE OF PROCEEDS		6
DESCRIPTION OF CAPITAL STOCK		7
SELLING STOCKHOLDERS		11
PLAN OF DISTRIBUTION		11
LEGAL MATTERS		15
EXPERTS		15

i

ABOUT THIS PROSPECTUS

This prospectus is part of an automatic shelf registration statement that we filed with the Securities and Exchange Commission (the “SEC”) as a “well-known seasoned issuer” as defined in Rule 405 under the Securities Act of 1933, as amended (the “Securities Act”). Under the automatic shelf registration process, the selling stockholders may, from time to time, offer and/or sell our common stock in one or more offerings or resales. This prospectus provides you with a general description of the common stock that the selling stockholders may offer. Each time the selling stockholders sell shares of common stock using this prospectus, we will provide a prospectus supplement and attach it to this prospectus and may also provide you with a free writing prospectus. The prospectus supplement and any free writing prospectus will contain more specific information about the offering, including the names of the selling stockholders. The prospectus supplement may also add, update, change, or clarify information contained in or incorporated by reference into this prospectus. Any statement that we make in this prospectus will be modified or superseded by any inconsistent statement made by us in a prospectus supplement. If there is any inconsistency between the information in this prospectus and the information in the prospectus supplement, you should rely on the information in the prospectus supplement.

The rules of the SEC allow us to incorporate by reference information into this prospectus. This means that important information is contained in other documents that are considered to be a part of this prospectus. Additionally, information that we file later with the SEC will automatically update and supersede this information. You should carefully read this prospectus, the applicable prospectus supplement, together with the additional information that is incorporated or deemed incorporated by reference in this prospectus as described under the heading “Where You Can Find More Information; Incorporation of Certain Documents by Reference,” and any applicable free writing prospectus before making an investment in our common stock. This prospectus contains summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of the documents referred to herein have been filed, or will be filed or incorporated by reference, as exhibits to the registration statement of which this prospectus is a part. The registration statement, including the exhibits and documents incorporated or deemed incorporated by reference in this prospectus, can be read on the SEC website or at the SEC offices mentioned under the heading “Where You Can Find More Information; Incorporation of Certain Documents by Reference.”

THIS PROSPECTUS MAY NOT BE USED TO SELL ANY SECURITIES UNLESS ACCOMPANIED BY A PROSPECTUS SUPPLEMENT OR A FREE WRITING PROSPECTUS.

Neither the delivery of this prospectus or any applicable prospectus supplement or any free writing prospectus nor any sale made using this prospectus or any applicable prospectus supplement or any free writing prospectus implies that there has been no change in our affairs or that the information contained in, or incorporated by reference in, this prospectus or in any applicable prospectus supplement or any free writing prospectus is correct as of any date after their respective dates. You should not assume that the information contained in, or incorporated by reference in, this prospectus or any applicable prospectus supplement or any free writing prospectus prepared by us is accurate as of any date other than the respective dates thereof. Our business, financial condition, results of operations, and prospects may have changed since those dates.

You should rely only on the information contained or incorporated by reference in this prospectus, in any accompanying prospectus supplement or in any free writing prospectuses related hereto that we have prepared. Neither we nor any selling stockholder or any of our or their respective affiliates have authorized anyone to provide you with different information and we and the selling stockholders take no responsibility for, and can provide no assurance as to

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the reliability of, any other information that others may give you. You should not assume that the information contained or incorporated by reference in this prospectus and any accompanying prospectus supplement or any free writing prospectus is accurate as of any date other than the respective dates thereof. This prospectus and any accompanying prospectus supplement or any free writing prospectus do not constitute an offer to sell or the solicitation of an offer to buy any securities other than the registered securities to which they relate, nor do this prospectus and any accompanying prospectus supplement or any free writing prospectus constitute an offer to sell or the solicitation of an offer to buy securities in any jurisdiction to any person to whom it is unlawful to make such offer or solicitation in such jurisdiction.

Unless the context requires otherwise, references to “our company,” “we,” “us,” “our,” and “Ceridian” refer to Ceridian HCM Holding Inc. and its direct and indirect subsidiaries on a consolidated basis.

WHERE YOU CAN FIND MORE INFORMATION; INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

We file annual, quarterly, and current reports, proxy statements, and other information with the SEC. The SEC maintains an Internet site that contains our reports, proxy statements, and other information regarding us at http://www.sec.gov. Our SEC filings are also available free of charge at our website (www.ceridian.com). However, except for our filings with the SEC that are incorporated by reference into this prospectus, the information on our website is not incorporated by reference into this prospectus.

The SEC allows “incorporation by reference” into this prospectus of information that we file with the SEC. This permits us to disclose important information to you by referencing these filed documents. Any information referenced this way is considered to be a part of this prospectus, and any information filed by us with the SEC subsequent to the date of this prospectus automatically will be deemed to update and supersede this information. We incorporate by reference the following documents, which we have filed with the SEC (excluding any documents or portions of such documents that have been “furnished” but not “filed” for purposes of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)):

• our Annual Report on Form 10-K for the year ended December 31, 2018, which we filed with the SEC on February  28, 2019, as revised by our Current Report on Form 8-K filed on May 21, 2019, which revised Items 6, 7 and 8 of the Form 10-K;

• our Quarterly Report on Form 10-Q for the quarter ended March 31, 2019, which we filed with the SEC on May 1, 2019;

• our Current Reports on Form 8-K, which we filed with the SEC on February 6, 2019 (with respect to item 5.02 only), February  15, 2019, March 15, 2019, April  9, 2019, May  1, 2019 (with respect to Item 5.02 only), May  2, 2019 and May 21, 2019;

• the information specifically incorporated by reference into our Annual Report on Form 10-K for the year ended December 31, 2018 from our Definitive Proxy Statement on Schedule 14A for our 2019 Annual Meeting of Stockholders, filed with the SEC on March 22, 2019 and additional materials filed on April 9, 2019; and

• the description of our capital stock contained or incorporated by reference in our registration statement on Form 8-A, as filed on April 24, 2018, and any amendments or reports filed for the purpose of updating such description.

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We incorporate by reference any filings made with the SEC in accordance with Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act on or after the date of this prospectus and before the date all of the securities offered hereby are sold or the offering is otherwise terminated, with the exception of any information furnished under Item 2.02 and Item 7.01 (including any financial statements or exhibits relating thereto furnished pursuant to Item 9.01) of Form 8-K, which is not deemed filed and which is not incorporated by reference herein. Any such filings shall be deemed to be incorporated by reference and to be a part of this prospectus from the respective dates of filing of those documents.

Any statement contained in a document incorporated or deemed to be incorporated by reference in this prospectus will be deemed to be modified or superseded to the extent that a statement contained herein or in any other subsequently filed document, which also is or is deemed to be incorporated by reference in this prospectus, modifies or supersedes that statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

We will provide to each person, including any beneficial owner, to whom a prospectus is delivered, without charge, upon written or oral request, a copy of any or all of the documents that are incorporated by reference into this prospectus but not delivered with this prospectus, excluding any exhibits to those documents unless the exhibit is specifically incorporated by reference as an exhibit in this prospectus. You should direct requests for documents to:

Ceridian HCM Holding Inc.

Investor Relations

3311 East Old Shakopee Road

Minneapolis, Minnesota

55425

(952) 853-8100

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and the information incorporated by reference herein contain forward-looking statements, including, without limitation, statements concerning the conditions of the human capital management (“HCM”) solutions industry and our operations, performance, and financial condition, including, in particular, statements relating to our business, growth strategies, product development efforts, and future expenses. Forward-looking statements can be identified by words such as “anticipates,” “intends,” “plans,” “seeks,” “believes,” “estimates,” “expects,” and similar references to future periods, or by the inclusion of forecasts or projections. Examples of forward-looking statements include, but are not limited to, statements we make regarding the outlook for our future business and financial performance.

Forward-looking statements are based on our current expectations and assumptions regarding our business, the economy, and other future conditions. Because forward-looking statements relate to the future, by their nature, they are subject to inherent uncertainties, risks, and changes in circumstances that are difficult to predict. As a result, our actual results may differ materially from those contemplated by the forward-looking statements. Important factors that could cause actual results to differ materially from those in the forward-looking statements include regional, national, or global political, economic, business, competitive, market, and regulatory conditions and the following:

• our inability to attain or to maintain profitability;

• significant competition for our solutions;

• our inability to continue to develop or to sell our existing Cloud solutions;

• our inability to manage our growth effectively;

• the risk that we may not be able to successfully migrate our Bureau customers to our Cloud solutions or to offset the decline in Bureau revenue with Cloud revenue;

• the market for enterprise cloud computing develops slower than we expect or declines;

• efforts to increase use of our Cloud solutions and our other applications may not succeed;

• we fail to provide enhancements and new features and modifications to our solutions;

• failure to comply with the Federal Trade Commission’s ongoing consent order regarding data protection;

• system interruptions or failures, including cyber-security breaches, identity theft, or other disruptions that could compromise our information;

• our failure to comply with applicable privacy, security, and data laws, regulations, and standards;

• changes in regulations governing privacy concerns and laws or other domestic or foreign data protection regulations;

• we are unable to successfully expand our current offerings into new markets or further penetrate existing markets;

• we are unable to meet the more complex configuration and integration demands of our large customers;

• our customers declining to renew their agreements with us or renewing at lower performance fee levels;

• we fail to manage our technical operations infrastructure;

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• we are unable to maintain necessary third party relationships or third party software licenses, or there are errors in the software we license;

• our inability to protect our intellectual property rights, proprietary technology, information, processes, and know-how;

• we fail to keep pace with rapid technological changes and evolving industry standards; or

• changes in laws and regulations related to the Internet or changes in the Internet infrastructure itself.

The risks and uncertainties that forward-looking statements are subject to include other risks detailed in the “Forward-Looking Statements,” “Risk Factors,” and other sections of our Annual Report on Form 10-K for the year ended December 31, 2018 and in our subsequent filings with the SEC, as incorporated by reference into this prospectus.

Although we have attempted to identify important risk factors, there may be other risk factors not presently known to us or that we presently believe are not material that could cause actual results and developments to differ materially from those made in or suggested by the forward-looking statements contained in this prospectus. If any of these risks materialize, or if any of the above assumptions underlying forward-looking statements prove incorrect, actual results and developments may differ materially from those made in or suggested by the forward-looking statements contained in this prospectus or in any documents incorporated by reference herein. For the reasons described above, we caution you against relying on any forward-looking statements, which should also be read in conjunction with the other cautionary statements that are included elsewhere in this prospectus or in any documents incorporated by reference herein. Any forward-looking statement made by us in this prospectus or in any documents incorporated by reference herein speaks only as of the date on which we make it. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to publicly update or to revise any forward-looking statement, whether as a result of new information, future developments, or otherwise, except as may be required by law. Comparisons of results for current and any prior periods are not intended to express any future trends or indications of future performance, unless specifically expressed as such, and should be viewed as historical data.

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THE COMPANY

Ceridian is a global HCM software company. Dayforce, our flagship cloud HCM platform, provides human resources (“HR”), payroll, benefits, workforce management, and talent management functionality. Our platform is used by organizations, regardless of industry or size, to optimize management of the entire employee lifecycle, including attracting, engaging, paying, deploying, and developing their people. Dayforce was built as a single application from the ground up that combines a modern, consumer-grade user experience with proprietary application architecture, including a single employee record and a rules engine spanning all areas of HCM. Our platform is designed to make work life better for our customers and their employees by improving HCM decision-making processes, streamlining workflows, exposing strategic organizational insights, and simplifying legislative compliance. The platform is designed to ease administrative work for both employees and managers, creating opportunities for companies to increase employee engagement. We are a founder-led organization, and our culture combines the agility and innovation of a start-up with a history of deep domain and operational expertise.

Corporate Information

Ceridian HCM Holding Inc. was incorporated in Delaware on July 3, 2013. We completed our initial public offering (“IPO”) in April 2018, and our common stock is listed on the NYSE and the TSX under the symbol “CDAY.” Our principal executive offices are located at 3311 East Old Shakopee Road, Minneapolis, Minnesota 55425, and our telephone number is (952) 853-8100. Our corporate website address is www.ceridian.com. Our website and the information contained on, or that can be accessed through, the website is not deemed to be incorporated by reference in, and is not considered part of, this prospectus. You should not rely on any such information in making your decision whether to purchase our common stock.

RISK FACTORS

You should consider the specific risks described in our Annual Report on Form 10-K for the year ended December 31, 2018, the risk factors described under the caption “Risk Factors” in any applicable prospectus supplement or any free writing prospectus that we provide you in connection with an offering of shares of our common stock pursuant to this prospectus and any risk factors set forth in our other filings with the SEC, pursuant to Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act that are incorporated or deemed to be incorporated by reference in this prospectus, before making an investment decision. See “Where You Can Find More Information; Incorporation of Certain Documents by Reference.” Each of the risks described in these documents could materially and adversely affect our business, financial condition, results of operations, and prospects and could result in a partial or complete loss of your investment. The risks and uncertainties are not limited to those set forth in the risk factors described in these documents. Additional risks and uncertainties not presently known to us or that we currently believe to be less significant than the risk factors incorporated by reference herein may also adversely affect our business. In addition, past financial performance may not be a reliable indicator of future performance, and historical trends should not be used to anticipate results or trends in future periods.

USE OF PROCEEDS

All shares of our common stock offered by this prospectus will be sold by the selling stockholders. We will not receive any proceeds from the sale of shares of our common stock by the selling stockholders.

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DESCRIPTION OF CAPITAL STOCK

The following is a description of (i) the material terms of our third amended and restated certificate of incorporation and amended and restated bylaws and (ii) certain applicable provisions of the Delaware General Corporation Law (the “DGCL”). For more information on how you can obtain our third amended and restated certificate of incorporation and our amended and restated bylaws, see “Where You Can Find More Information; Incorporation of Certain Documents by Reference.” We urge you to read our third amended and restated certificate of incorporation and our amended and restated bylaws in their entirety.

Authorized Capitalization

Our authorized capital stock consists of (i) 500,000,000 shares of common stock, par value $0.01 per share, of which 138,332,319 shares were outstanding and 2,343,013 shares were issuable upon the exchange of exchangeable shares of our subsidiary, Ceridian AcquisitionCo ULC (the “Exchangeable Shares”), as of March 31, 2019 and (ii) 10,000,000 shares of preferred stock, par value $0.01 per share, none of which are outstanding as of March 31, 2019, other than the Special Voting Share described below. Additionally, we have 28,672,211 registered shares of common stock reserved for issuance under our equity incentive plans and employee stock purchase plan of which options to purchase 16,752,700 shares of common stock and 714,073 restricted stock units representing 17,466,773 shares of common stock are outstanding as of March 31, 2019.

Common Stock

Holders of our common stock are entitled to the rights set forth below.

Voting Rights

Directors are elected by a plurality of the votes entitled to be cast except as set forth below with respect to directors to be elected by the holders of common stock. Our stockholders do not have cumulative voting rights. Except as otherwise provided in our third amended and restated certificate of incorporation or as required by law, all matters to be voted on by our stockholders other than matters relating to the election and removal of directors must be approved by a majority of the shares present in person or by proxy at the meeting and entitled to vote on the subject matter or by a written resolution of the stockholders representing the number of affirmative votes required for such matter at a meeting.

Dividend Rights

Holders of common stock share equally in any dividend declared by our board of directors (the “Board”), subject to the rights of the holders of any outstanding preferred stock.

Liquidation Rights

In the event of any voluntary or involuntary liquidation, dissolution, distribution of assets, or winding up of our affairs, holders of our common stock would be entitled to share ratably in our assets that are legally available for distribution to stockholders after payment of liabilities. If we have any preferred stock outstanding at such time, holders of the preferred stock may be entitled to distribution and/or liquidation preferences. In either such case, we must pay the applicable distribution to the holders of our preferred stock before we may pay distributions to the holders of our common stock.

Other Rights

Our stockholders have no preemptive or other rights to subscribe for additional shares. All holders of our common stock are entitled to share equally on a share-for-share basis in any assets available for

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distribution to common stockholders upon our liquidation, dissolution, or winding up. All outstanding shares are validly issued, fully paid and nonassessable.

Registration Rights Agreement

In connection with the IPO, we entered into a registration rights agreement with the affiliates and co-investors of Thomas H. Lee Partners, L.P. and Cannae Holdings, Inc. (together with Thomas H. Lee Partners, L.P., the “Sponsors”), David D. Ossip, Alon Ossip, the brother of David D. Ossip, and entities controlled by each of David D. Ossip and Alon Ossip in respect of the shares of common stock and Exchangeable Shares held by such holder immediately following the IPO. This agreement provides these holders (and their permitted transferees) with the right to require us, at our expense, to register shares of our common stock that they hold. The agreement also provides that we will pay certain expenses of these electing holders relating to such registrations and indemnify them against certain liabilities that may arise under the Securities Act.

Voting Agreement

In connection with the IPO, we entered into a voting agreement with the Sponsors, pursuant to which we are required to take all necessary action to cause the Board to include individuals designated by the Sponsors. The voting agreement also requires the Sponsors to consult with one another regarding the transfer of their equity securities in us.

Preferred Stock

Our Board is authorized to provide for the issuance of preferred stock in one or more series and to fix the preferences, powers, and relative, participating, optional, or other special rights and qualifications, limitations, or restrictions thereof, including the dividend rate, conversion rights, voting rights, redemption rights, and liquidation preference and to fix the number of shares to be included in any such series without any further vote or action by our stockholders. Any preferred stock so issued may rank senior to our common stock with respect to the payment of dividends or amounts upon liquidation, dissolution or winding up, or both. In addition, any such shares of preferred stock may have class or series voting rights. The issuance of preferred stock may have the effect of delaying, deferring, or preventing a change in control of our company without further action by the stockholders and may adversely affect the voting and other rights of the holders of our common stock. Our Board has not authorized the issuance of any shares of preferred stock, and we have no agreements or plans for the issuance of any shares of preferred stock.

Our Board has authorized the issuance of one share of special voting preferred stock, par value $0.01 per share (the “Special Voting Share”), in our amended and restated certificate of incorporation. The holder of the Special Voting Share is entitled to vote on all matters that a holder of our common stock is entitled to vote on and is generally entitled to cast a number of votes equal to the number of shares of common stock issuable upon exchange of the Exchangeable Shares then outstanding. The holder of the Special Voting Share is not entitled to receive dividends.

Anti-takeover Provisions

Our third amended and restated certificate of incorporation and amended and restated bylaws contains provisions that delay, defer, or discourage transactions involving an actual or potential change in control of us or change in our management. We expect that these provisions, which are summarized below, will discourage coercive takeover practices or inadequate takeover bids. These provisions are designed to encourage persons seeking to acquire control of us to first negotiate with our Board, which we believe may result in an improvement of the terms of any such acquisition in favor of our

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stockholders. However, they also give our Board the power to discourage transactions that some stockholders may favor, including transactions in which stockholders might otherwise receive a premium for their shares or transactions that our stockholders might otherwise deem to be in their best interests. Accordingly, these provisions could adversely affect the price of our common stock.

Classified Board of Directors

Our third amended and restated certificate of incorporation provides that our Board shall be divided into three classes of directors, designated Class I, Class II, and Class III, and that each class shall contain approximately one-third of the total number of directors serving staggered three-year terms. As a result, approximately one third of our Board is elected each year. This classified board provision prevents a third party who acquires control of a majority of our outstanding voting stock from obtaining control of our Board until the second annual meeting of stockholders following the date the acquirer obtains the controlling interest.

Removal of Directors

Our third amended and restated certificate of incorporation provides that any director or the entire Board may be removed from office at any time, only for cause, and only by the vote of the holders of a majority of the shares entitled to vote at an election of directors. “Cause” shall mean, with respect to any director, (x) the willful failure by such director to perform, or the gross negligence of such director in performing, the duties of a director, (y) the engaging by such director in willful or serious misconduct that is injurious to the Company, or (z) the conviction of such director of, or the entering by such director of a plea of nolo contendere to, a crime that constitutes a felony. This provision is likely to make it more difficult for stockholders to change the composition of the Board.

Requirements for Advance Notification of Stockholder Meetings, Nominations, and Proposals

Our amended and restated bylaws provide that special meetings of the stockholders may be called only upon the request of a majority of our Board or upon the request of the Chief Executive Officer. Our amended and restated bylaws prohibit the conduct of any business at a special meeting other than as specified in the notice for such meeting. These provisions may have the effect of deferring, delaying, or discouraging hostile takeovers or changes in control or management of our company.

Our amended and restated bylaws establish advance notice procedures with respect to stockholder proposals and the nomination of candidates for election as directors, other than nominations made by or at the direction of our Board or a committee of our Board. In order for any matter to be “properly brought” before a meeting, a stockholder must comply with the advance notice requirements of directors, which may be filled only by a vote of a majority of directors then in office, even though less than a quorum, and not by the stockholders. Our amended and restated bylaws allow the presiding officer at a meeting of the stockholders to adopt rules and regulations for the conduct of meetings, which may have the effect of precluding the conduct of certain business at a meeting if the rules and regulations are not followed. These provisions may also defer, delay, or discourage a potential acquirer from conducting a solicitation of proxies to elect the acquirer’s own slate of directors or otherwise attempting to obtain control of our company.

Stockholder Action by Written Consent

Our third amended and restated certificate of incorporation provides that, at any time when the Sponsors beneficially own, in the aggregate, more than 50% of the voting power of our stock entitled to vote generally in the election of directors, any action required or permitted to be taken by the

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stockholders of the Company at any meeting of stockholders may be taken without a meeting if a consent in writing, setting forth the action so taken, is signed by stockholders holding not less than the minimum number of votes that would be necessary to authorize or take such action at a meeting at which all shares entitled to vote thereon were present and voted. At any time when the Sponsors beneficially own, in the aggregate, less than 50% of the voting power of our stock entitled to vote generally in the election of directors, our third amended and restated certificate of incorporation provides that, subject to the rights of any holders of preferred stock to act by written consent instead of a meeting, stockholder action may be taken only at an annual meeting or special meeting of stockholders and may not be taken by written consent instead of a meeting. Failure to satisfy any of the requirements for a stockholder meeting could delay, prevent, or invalidate stockholder action.

Section 203 of the DGCL

Our third amended and restated certificate of incorporation provides that the provisions of Section 203 of the DGCL, which relate to business combinations with interested stockholders, do not apply to us. Section 203 of the DGCL prohibits a publicly held Delaware corporation from engaging in a business combination transaction with an interested stockholder (a stockholder who owns more than 15% of our common stock) for a period of three years after the interested stockholder became such unless the transaction fits within an applicable exemption, such as Board approval of the business combination or the transaction that resulted in such stockholder becoming an interested stockholder. These provisions will apply even if the business combination could be considered beneficial by some stockholders. Our third amended and restated certificate of incorporation contains provisions that have the same effect as Section 203 of the DGCL. Although we have elected to opt out of the statute’s provisions, we could elect to be subject to Section 203 in the future.

Amendment to Bylaws and Certificate of Incorporation

Our third amended and restated certificate of incorporation and our amended and restated bylaws provide that, subject to the affirmative vote of the holders of any series of preferred stock required by law, the provisions (i) of our amended and restated bylaws may be adopted, amended, or repealed if approved by a majority of the board of directors then in office or approved by holders of our common stock and (ii) of our third amended and restated certificate of incorporation may be adopted, amended, or repealed as provided by the DGCL.

Listing

Our common stock is listed on the NYSE and the TSX under the symbol “CDAY.” Our shares of common stock trade in U.S. dollars on the NYSE and in Canadian dollars on the TSX.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is American Stock Transfer & Trust Company, LLC.

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SELLING STOCKHOLDERS

Information regarding the beneficial ownership of our common stock by the selling stockholders, the number of shares being offered by the selling stockholders and the number of shares beneficially owned by the selling stockholders after the applicable offering will be set forth in a prospectus supplement, free writing prospectus, post-effective amendment or filings we make with the SEC under the Exchange Act that are incorporated by reference.

PLAN OF DISTRIBUTION

The selling stockholders may sell the common stock offered by this prospectus from time to time in one or more transactions, including without limitation:

• directly to one or more purchasers;

• through agents;

• to or through underwriters, brokers, or dealers; or

• through a combination of any of these methods.

In addition, the manner in which the selling stockholders may sell some or all of the securities covered by this prospectus includes any method permitted by law, including, without limitation, through:

• a block trade in which a broker-dealer will attempt to sell as agent, but may position or resell a portion of the block, as principal, in order to facilitate the transaction;

• purchases by a broker-dealer, as principal, and resale by the broker-dealer for its account;

• ordinary brokerage transactions and transactions in which a broker solicits purchasers; or

• privately negotiated transactions.

The selling stockholders may also enter into hedging transactions. For example, the selling stockholders may:

• enter into transactions with a broker-dealer or affiliate thereof in connection with which such broker-dealer or affiliate will engage in short sales of the common stock pursuant to this prospectus, in which case such broker-dealer or affiliate may use shares of common stock received from the selling stockholders to close out its short positions;

• sell securities short and redeliver such shares to close out the short positions;

• enter into option or other types of transactions that require the selling stockholders to deliver common stock to a broker-dealer or an affiliate thereof, who will then resell or transfer the common stock under this prospectus; or

• loan or pledge the common stock to a broker-dealer or an affiliate thereof, who may sell the loaned shares or, in an event of default in the case of a pledge, sell the pledged shares pursuant to this prospectus.

The securities covered by this prospectus may be sold:

• on a national securities exchange;

• in the over-the-counter market; or

• in transactions otherwise than on an exchange or in the over-the-counter market, or in combination.

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A prospectus supplement with respect to each offering of securities will state the terms of the offering of the securities, including:

• the name or names of any underwriters or agents and the amounts of securities underwritten or purchased by each of them, if any;

• the public offering price or purchase price of the securities and the net proceeds to be received by the selling stockholders from the sale;

• any delayed delivery arrangements;

• any underwriting discounts or agency fees and other items constituting underwriters’ or agents’ compensation;

• any discounts or concessions allowed, reallowed, or paid to dealers; and

• any securities exchange or markets on which the securities may be listed.

The offer and sale of the securities described in this prospectus by the selling stockholders, the underwriters or the third parties described above may be effected from time to time in one or more transactions, including privately negotiated transactions, either:

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

• at market prices prevailing at the time of sale;

• at prices related to the prevailing market prices; or

• at negotiated prices.

General

Any public offering price and any discounts, commissions, concessions, or other items constituting compensation allowed, reallowed, or paid to underwriters, dealers, agents, or remarketing firms may be changed from time to time. Any selling stockholders, underwriters, dealers, agents. and remarketing firms that participate in the distribution of the offered securities may be “underwriters” as defined in the Securities Act. Any discounts or commissions they receive from the selling stockholders and any profits they receive on the resale of the offered securities may be treated as underwriting discounts and commissions under the Securities Act. We will identify any underwriters, agents, or dealers and describe their commissions, fees, or discounts in the applicable prospectus supplement or pricing supplement, as the case may be.

The selling stockholders and other persons participating in the sale or distribution of the securities will be subject to the applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M. This regulation may limit the timing of purchases and sales of any of the securities by the selling stockholders or any other person. The anti-manipulation rules under the Securities Act may apply to sales of securities in the market and to the activities of the selling stockholders and their affiliates. Furthermore, Regulation M may restrict the ability of any person engaged in the distribution for a period of up to five business days before the distribution. These restrictions may affect the marketability of the securities and the ability of any person or entity to engage in market-making activities with respect to the securities.

The selling stockholders are not restricted as to the price or prices at which the securities may be sold. Sales of such securities may have an adverse effect on the market price of the securities.

Moreover, it is possible that a significant number of shares of common stock could be sold at the same time, which may have an adverse effect on the market price of the securities.

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We cannot assure you that the selling stockholders will sell all or any portion of the securities offered hereby.

Underwriters and Agents

If underwriters are used in a sale, they will acquire the offered securities for their own account. The underwriters may resell the offered securities in one or more transactions, including negotiated transactions. These sales may be made at a fixed public offering price or prices, which may be changed, at market prices prevailing at the time of the sale, at prices related to such prevailing market price or at negotiated prices. The selling stockholders may offer the securities to the public through an underwriting syndicate or through a single underwriter. The underwriters in any particular offering will be mentioned in the applicable prospectus supplement or pricing supplement, as the case may be.

Unless otherwise specified in connection with any particular offering of securities, the obligations of the underwriters to purchase the offered securities will be subject to certain conditions contained in an underwriting agreement that the selling stockholders will enter into with the underwriters at the time of the sale to them. The underwriters will be obligated to purchase all of the securities of the series offered if any of the securities are purchased, unless otherwise specified in connection with any particular offering of securities. Any initial offering price and any discounts or concessions allowed, reallowed, or paid to dealers may be changed from time to time.

The selling stockholders may designate agents to sell the offered securities. Unless otherwise specified in connection with any particular offering of securities, the agents will agree to use their best efforts to solicit purchases for the period of their appointment. The selling stockholders may also sell the offered securities to one or more remarketing firms, acting as principals for their own accounts or as agents for the selling stockholders. These firms will remarket the offered securities upon purchasing them in accordance with a redemption or repayment pursuant to the terms of the offered securities. A prospectus supplement or pricing supplement, as the case may be will identify any remarketing firm and will describe the terms of its agreement, if any, with the selling stockholders and its compensation.

In connection with offerings made through underwriters or agents, the selling stockholders may enter into agreements with such underwriters or agents pursuant to which the selling stockholders receive outstanding securities in consideration for the securities being offered to the public for cash. In connection with these arrangements, the underwriters or agents may also sell securities covered by this prospectus to hedge their positions in these outstanding securities, including in short sale transactions. If so, the underwriters or agents may use the securities received by the selling stockholders under these arrangements to close out any related open borrowings of securities.

Dealers

The selling stockholders may sell the offered securities to dealers as principals. The selling stockholders may negotiate and pay dealers’ commissions, discounts, or concessions for their services. The dealer may then resell such securities to the public either at varying prices to be determined by the dealer or at a fixed offering price agreed to with the selling stockholders, at the time of resale. Dealers engaged by the selling stockholders may allow other dealers to participate in resales.

Direct Sales

The selling stockholders may choose to sell the offered securities directly. In this case, no underwriters or agents would be involved.

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Institutional Purchasers

The selling stockholders may authorize agents, dealers, or underwriters to solicit certain institutional investors to purchase offered securities on a delayed delivery basis pursuant to delayed delivery contracts providing for payment and delivery on a specified future date. The applicable prospectus supplement or pricing supplement, as the case may be, will provide the details of any such arrangement, including the offering price and commissions payable on the solicitations.

The selling stockholders will enter into such delayed contracts only with institutional purchasers that the selling stockholders approve. These institutions may include commercial and savings banks, insurance companies, pension funds, investment companies, and educational and charitable institutions.

Indemnification; Other Relationships

The selling stockholders may have agreements with agents, underwriters, dealers, and remarketing firms to indemnify them against certain civil liabilities, including liabilities under the Securities Act. Agents, underwriters, dealers, and remarketing firms and their affiliates may engage in transactions with or perform services for the selling stockholders in the ordinary course of business. This includes commercial banking and investment banking transactions.

Market-Making, Stabilization, and Other Transactions

In connection with any offering of common stock, the underwriters may purchase and sell shares of common stock in the open market. These transactions may include short sales, syndicate covering transactions, and stabilizing transactions. Short sales involve syndicate sales of common stock in excess of the number of shares to be purchased by the underwriters in the offering, which creates a syndicate short position. “Covered” short sales are sales of shares made in an amount up to the number of shares represented by the underwriters’ over-allotment option. In determining the source of shares to close out the covered syndicate short position, the underwriters will consider, among other things, the price of shares available for purchase in the open market as compared to the price at which they may purchase shares through the over-allotment option. Transactions to close out the covered syndicate short involve either purchases of the common stock in the open market after the distribution has been completed or the exercise of the over-allotment option. The underwriters may also make “naked” short sales of shares in excess of the over-allotment option. The underwriters must close out any naked short position by purchasing shares of common stock in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the shares in the open market after pricing that could adversely affect investors who purchase in the offering. Stabilizing transactions consist of bids for or purchases of shares in the open market while the offering is in progress for the purpose of pegging, fixing, or maintaining the price of the securities.

In connection with any offering, the underwriters may also engage in penalty bids. Penalty bids permit the underwriters to reclaim a selling concession from a syndicate member when the securities originally sold by the syndicate member are purchased in a syndicate covering transaction to cover syndicate short positions. Stabilizing transactions, syndicate covering transactions, and penalty bids may cause the price of the securities to be higher than it would be in the absence of the transactions. The underwriters may, if they commence these transactions, discontinue them at any time.

We will identify the specific plan of distribution in connection with any offering of our common stock, including the use of any underwriters, dealers, agents or direct purchasers and their compensation, in the applicable accompanying prospectus supplement.

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LEGAL MATTERS

Weil, Gotshal & Manges LLP, New York, New York, will pass upon the validity of the common stock offered by this prospectus. Additional legal matters may be passed upon for us, the selling stockholders or any underwriters, dealers or agents, by counsel that we will name in the applicable prospectus supplement.

EXPERTS

The consolidated financial statements of Ceridian HCM Holding Inc. as of December 31, 2018 and 2017 and for each of the years in the three-year period ended December 31, 2018 have been incorporated by reference herein and in the registration statement in reliance upon the reports of KPMG LLP, an independent registered public accounting firm, incorporated by reference herein, and upon the authority of said firm as experts in accounting and auditing.

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10,000,000 Shares

Common Stock

Prospectus Supplement

Goldman Sachs & Co. LLC

August 6, 2019