WASHINGTON, D.C. 20549

Emerging growth company    ý

The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and we are not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted.

PROSPECTUS (Subject to Completion)

Issued          , 2019

5,000,000 American Depositary Shares

REPRESENTING 5,000,000 CLASS A ORDINARY SHARES

The selling shareholders identified in this prospectus are offering 5,000,000 American Depositary Shares, or ADSs. We are not selling any ADSs and we will not receive any proceeds from the ADSs sold by the selling shareholders. Each ADS represents one Class A ordinary share. The ADSs may be evidenced by American Depositary Receipts, or ADRs.

We have three classes of ordinary shares, Class A ordinary shares, Class B ordinary shares and Class C ordinary shares. The rights of the holders of Class A ordinary shares, Class B ordinary shares and Class C ordinary shares are identical, except with respect to voting, conversion and transfer rights. Each Class A ordinary share is entitled to one vote per share. Each Class B ordinary share is entitled to ten votes per share and is convertible into one Class A ordinary share, subject to certain restrictions. Each Class C ordinary share is entitled to one vote per share and is convertible into one Class A ordinary share, subject to certain restrictions. Outstanding Class B ordinary shares will represent approximately 89.7% of the voting power of our outstanding share capital immediately following the closing of this offering.

Our ADSs are listed on the New York Stock Exchange under the symbol “DAVA.” On April 11, 2019 the last reported sale price of our ADSs on the New York Stock Exchange was $27.35 per ADS.

We are an “emerging growth company” as defined under the U.S. federal securities laws and, as such, have elected to comply with certain reduced public company reporting requirements for this and future filings. Investing in our ADSs involves risk. See “Risk Factors” beginning on page 15.

The selling shareholders have granted the underwriters the right to purchase up to an additional 750,000 ADSs at the public offering price less the underwriting discounts and commissions.

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities, or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the ADSs to purchasers on or about                    , 2019.

•	Ideation through Production. We help our clients become digital, experience-driven businesses by assisting them in their journey from idea generation to development and deployment of products, platforms and solutions.

•	Proprietary Framework for Distributed Enterprise Agile at Scale. To allow us to deliver Distributed Enterprise Agile at scale, we have developed a proprietary Agile scaling framework, TEAS. TEAS utilizes common Agile scaling frameworks, but enhances them by balancing the requirements of delivering both quality and speed-to-market.

•

Expertise in Next-Generation Technologies. We have deep expertise in next-generation technologies that drives our ability to provide solutions for Digital Evolution, Agile Transformation and Automation. Our expertise ranges from technologies developed over the last decade including mobile connectivity, social media, automation, big data analytics and cloud delivery to next-generation technologies such as IoT, artificial intelligence, machine learning, augmented reality, virtual reality and blockchain.

•	Strong Domain Expertise. We have deep expertise in industry verticals that are being disrupted by technological change, particularly Payments and Financial Services and Technology, Media and Telecommunications.

•

Employer of Choice in Regions with Deep Pools of Talent. We strive to be one of the leading employers of IT professionals in the regions in which we operate. We locate our nearshore delivery centers in countries that not only have abundant IT talent pools, but also offer us an opportunity to be a preferred employer. For example, a majority of our employees are located in Romania, where we have been identified as a top employer for each of the last five years.

•

Distinctive Culture and Values. We believe that our people are our most important asset. We provide Endavans with training to develop their technical and soft skills, in an environment where they are continually challenged and given opportunities to grow as professionals. We believe that we have built an organization deeply committed to helping people succeed and that our culture fosters our core values of openness, thoughtfulness and adaptability.

•	Founder Led, Experienced and Motivated Management Team. Our management team, led by John Cotterell, our founder and chief executive officer, has significant experience in the global technology and services industries. Our most senior 45 employees have an average tenure at Endava of 11 years.

•	Expand Relationships with Existing Clients. We are focused on continuing to expand our relationships with existing clients by helping them solve new problems and become more engaging, responsive and efficient.

•	Establish New Client Relationships. We believe that we have a significant opportunity to add new clients in our existing core industry verticals and geographies, and to expand our client base to new industry verticals and geographies.

•	Lead Adoption of Next-Generation Technologies. We seek to apply our creative skills and deep digital technical engineering capabilities to enhance our clients’ value to their end customers and users. As a result, we are highly focused on remaining at the forefront of emerging technology trends.

•	Expand Scale in Nearshore Delivery. As we continue to expand our relationships with existing clients and attract new clients, we plan to expand our teams at existing delivery centers and open new delivery centers in nearshore locations with an abundance of technical talent.

•	Selectively Pursue “Tuck-In” Acquisitions. We have a demonstrated track record of successfully identifying, acquiring and integrating complementary business and plan to leverage this experience as we pursue our “tuck-in” acquisition strategy.

•	We may not be able to sustain our revenue growth rate in the future.

•	We are dependent on our largest clients.

•	We must attract and retain highly-skilled IT professionals.

•	Our revenue is dependent on a limited number of industry verticals.

•	Our profitability could suffer if we are not able to maintain favorable pricing.

•	Recent acquisitions and potential future acquisitions could prove difficult to integrate, disrupt our business, dilute shareholder value and strain our resources.

•	We are focused on growing our client base in North America and may not be successful.

•	We face intense competition.

•	We are dependent on our senior management team and key employees.

•	If we are unable to comply with our security obligations or our computer systems are or become vulnerable to security breaches, we may face reputational damage and lose clients and revenue.

•	The United Kingdom’s withdrawal from the European Union may have a negative effect on global economic conditions, financial markets and our business.

•	Fluctuations in currency exchange rates and increased inflation could materially adversely affect our financial condition and results of operations.

•	Our international operations involve risks that could increase our expenses, adversely affect our results of operations and require increased time and attention from our management.

•

The three class structure of our ordinary shares has the effect of concentrating voting control for the foreseeable future, which will limit your ability to influence corporate matters. Following the completion of this offering, holders of our Class B ordinary shares will collectively beneficially hold shares representing approximately 90.6% of the voting rights of our outstanding share capital (or 89.0% of the voting rights of our outstanding share capital if the underwriters exercise their option to purchase additional ADSs in full) and John Cotterell, our Chief Executive Officer, will beneficially hold Class B ordinary shares representing approximately 35.2% of the voting rights of our outstanding share capital. Notwithstanding this concentration of control, we do not currently qualify as a “controlled company” under New York Stock Exchange listing rules.

•	not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act of 2002; and

•	not being required to comply with any requirement that may be adopted by the Public Company Accounting Oversight Board regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements (i.e., an auditor discussion and analysis).

•	the sections of the Exchange Act regulating the solicitation of proxies, consents or authorizations in respect of a security registered under the Exchange Act;

•	the sections of the Exchange Act requiring insiders to file public reports of their stock ownership and trading activities and liability for insiders who profit from trades made in a short period of time; and

•	the rules under the Exchange Act requiring the filing with the SEC of quarterly reports on Form 10-Q containing unaudited financial and other specific information, and current reports on Form 8-K upon the occurrence of specified significant events.

•

2,271,531 Class A ordinary shares issuable upon the exercise of share options outstanding as of March 15, 2019, at a weighted average exercise price of £4.75 per share, with the balance of the total number of 6,475,511 Class A ordinary shares subject to share options outstanding as of March 15, 2019 being currently issued and outstanding and held by the Endava Limited Guernsey Employee Benefit Trust, or the EBT;

•	42,189 Class A ordinary shares that were issuable as of March 15, 2019 in connection with our acquisition of Velocity Partners LLC, or Velocity Partners;

•	5,588,719 Class A ordinary shares reserved for future issuance pursuant to our 2018 Equity Incentive Plan as of March 15, 2019, which includes provisions that automatically increase the number of Class A ordinary shares reserved for issuance thereunder each year, in an amount equal to 2% of the total number of shares outstanding on December 31 of the preceding calendar year; and

•	3,155,611 Class A ordinary shares reserved for future issuance pursuant to the Endava plc 2018 Sharesave Plan, which includes provisions that automatically increase the number of Class A ordinary shares reserved for issuance thereunder each year, in an amount equal to 2% of the total number of shares outstanding on December 31 of the preceding calendar year.

•

the conversion, immediately prior to the completion of this offering and/or the completion of the sale of the securities subject to the underwriters' option to purchase additional ADSs, as applicable, of 1,842,983 Class B ordinary shares (or 2,292,845 Class B ordinary shares if the underwriters exercise their option to purchase additional ADSs in full) and 1,147,153 Class C ordinary shares (or 1,242,329 Class C ordinary shares if the underwriters exercise their option to purchase additional ADSs in full) into an aggregate of 2,990,136 Class A ordinary shares (or 3,535,174 Class A ordinary shares if the underwriters exercise their option to purchase additional ADSs in full), which Class A ordinary shares are to be offered in the form of ADSs by the selling shareholders;

•	no conversion of Class B ordinary shares or Class C ordinary shares into Class A ordinary shares after March 15, 2019, other than in connection with this offering as contemplated above;

•	no exercise of outstanding share options after March 15, 2019; and

•	no exercise of the underwriters’ option to purchase additional ADSs.

(1)	Includes share-based compensation expenses as follows:

(1)	Working capital is defined as total current assets minus total current liabilities.

(1)

We monitor our revenue growth rate at constant currency. As the impact of foreign currency exchange rates is highly variable and difficult to predict, we believe revenue growth rate at constant currency allows us to better understand the underlying business trends and performance of our ongoing operations on a period-over-period basis. We calculate revenue growth rate at constant currency by translating revenue from entities reporting in foreign currencies into British Pounds using the comparable foreign currency exchange rates from the prior period. For example, the average rates in effect for the fiscal year ended June 30, 2017 were used to convert revenue for the fiscal year ended June 30, 2018 and the revenue for the comparable prior period ended June 30, 2017, rather than the actual exchange rates in effect during the respective period. Revenue growth rate at constant currency is not a measure calculated in accordance with IFRS. While we believe that revenue growth rate at constant currency provides useful information to investors in understanding and evaluating our results of operations in the same manner as our management, our use of revenue growth rate at constant currency has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of our financial results as reported under IFRS. Further, other companies,

(2)

We monitor our average number of employees involved in delivery of our services because we believe it gives us visibility to the size of both our revenue-producing base and our most significant cost base, which in turn allows us better understand changes in our utilization rates and gross margins on a period-over-period basis. We calculate average number of employees involved in delivery of our services as the average of our number of full-time employees involved in delivery of our services on the last day of each month in the relevant period.

(3)	We monitor our revenue concentration to better understand our dependence on large clients on a period-over-period basis and to monitor our success in diversifying our revenue basis. We define revenue concentration as the percent of our total revenue derived from our 10 largest clients by revenue in each period presented.

(4)	We monitor our number of large clients to better understand our progress in winning large contracts on a period-over-period basis. We define number of large clients as the number of clients from whom we generated more than £1.0 million of revenue in the prior 12-month period.

(5)

We monitor our adjusted profit before taxes margin, or Adjusted PBT Margin, to better understand our ability to manage operational costs, to evaluate our core operating performance and trends and to develop future operating plans. In particular, we believe that the exclusion of certain expenses in calculating Adjusted PBT Margin facilitates comparisons of our operating performance on a period-over-period basis. Our Adjusted PBT Margin is our Adjusted PBT, which is our profit before taxes adjusted to exclude the impact of share-based compensation expense, amortization of acquired intangible assets, realized and unrealized foreign currency exchange gains and losses, initial public offering expenses incurred, Sarbanes-Oxley compliance readiness expenses and fair value movement of contingent consideration (all of which are non-cash other than realized foreign currency exchange gains and losses, initial public offering expenses and Sarbanes-Oxley compliance readiness expenses), as a percentage of our total revenue. We do not consider these excluded items to be indicative of our core operating performance. Adjusted PBT Margin is not a measure calculated in accordance with IFRS. While we believe that Adjusted PBT Margin provides useful information to investors in understanding and evaluating our results of operations in the same manner as our management, our use of Adjusted PBT Margin has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of our financial results as reported under IFRS. For example, Adjusted PBT Margin does not reflect the potentially dilutive impact of share-based compensation nor does it reflect the potentially significant impact of foreign currency exchange rate fluctuations on our working capital. Further, other companies, including companies in our industry, may adjust their profit differently to capture their operating performance, which may reduce the value of Adjusted PBT Margin as a comparative measure. The following table presents a reconciliation of Adjusted PBT to profit before taxes, the most directly comparable financial measure calculated and presented in accordance with IFRS, for each of the periods indicated:

(6)

We monitor our free cash flow to better understand and evaluate our liquidity position and to develop future operating plans. Our free cash flow is our net cash provided by (used in) operating activities, plus grant received and less purchases of non-current tangible and intangible assets. For a discussion of grant received, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Components of Results of Operations—Cost of Sales.” Free cash flow is not a measure calculated in accordance with IFRS. While we believe that free cash flow provides useful information to investors in understanding and evaluating our liquidity position in the same manner as our management, our use of free cash flow has limitations as an analytical tool, and you should not consider it in isolation or as a substitute for analysis of our financial results as reported under IFRS. Further, other companies, including companies in our industry, may adjust their cash flows differently to capture their liquidity, which may reduce the value of free cash flow as a comparative measure. The following table presents a reconciliation of free cash flow to net cash provided by (used in) operating activities, the most directly comparable financial measure calculated and presented in accordance with IFRS, for each of the periods indicated:

During the fiscal years ended June 30, 2016, 2017 and 2018 and the six months ended December 31, 2017 and 2018, our ten largest clients accounted for 53.7%, 49.1%, 41.5%, 45.2% and 37.9% of our revenue, respectively. Our largest client for the fiscal years ended June 30, 2016, 2017 and 2018 and the six months ended December 31, 2017 and 2018, Worldpay (UK) Limited, or Worldpay, accounted for 15.6%, 13.0%, 10.8%, 11.9% and 9.7% of our revenue, respectively. We are party to two principal agreements with Worldpay: a master services agreement and a build and operate agreement. Under the master services agreement, Worldpay committed to spend an aggregate of £55.7 million, after giving effect to certain discounts, with us during the period from January 1, 2017 to December 31, 2021, with annual discounted commitments ranging from £9.7 million to £12.2 million. Either we or Worldpay may terminate the master services agreement for cause (including material breach by the other party) and Worldpay may terminate the master services agreement if we undergo a change of control or due to regulatory requirements. In addition, Worldpay may terminate the master services agreement for convenience subject to six months prior notice and payment of 30% of the minimum undiscounted commitment amount for the 12-month period following termination.

Historically, we have focused on developing industry expertise and deep client relationships in a limited number of industry verticals. As a result, a substantial portion of our revenue has been generated by clients operating in the Payments and Financial Services vertical and the technology, media and telecommunications, or TMT, vertical. Payments and Financial Services and TMT constituted 55.1% and 36.8% of our revenue, respectively, for the fiscal year ended June 30, 2016, 57.1% and 30.5% of our revenue, respectively, for the fiscal year ended June 30, 2017, 56.8% and 21.8% of our revenue, respectively, for the fiscal year ended June 30, 2018 and 53.1% and 27.1% of our revenue, respectively, for the six months ended December 31, 2018. Our business growth largely depends on continued demand for our services from clients in Payments and Financial Services and TMT, and any slowdown or reversal of the trend to spend on technology services in these verticals could result in a decrease in the demand for our services and materially adversely affect our revenue, financial condition and results of operations.

As of December 31, 2018, we had 5,389 employees, approximately 53.9% of whom work in nearshore delivery centers in European Union countries. We have operations in a number of countries, including Argentina, Bulgaria, Colombia, Denmark, Germany, Macedonia, Moldova, the Netherlands, Romania, Serbia, the United Kingdom, the United States, Uruguay and Venezuela, and we serve clients across Europe and North America. As a result, we may be subject to risks inherently associated with international operations. Our global operations expose us to numerous and sometimes conflicting legal, tax and regulatory requirements, and violations or unfavorable interpretation by the respective authorities of these regulations could harm our business. Risks associated with international operations include difficulties in enforcing contractual rights, potential difficulties in collecting accounts receivable, the burdens

The deposit agreement governing the ADSs representing our Class A ordinary shares provides that holders and beneficial owners of ADSs irrevocably waive the right to a trial by jury in any legal proceeding arising out of or relating to the deposit agreement or the ADSs, including in respect of claims under federal securities laws, against us or the depositary to the fullest extent permitted by applicable law. If this jury trial waiver provision is prohibited by applicable law, an action could nevertheless proceed under the terms of the deposit agreement with a jury trial. To our knowledge, the enforceability of a jury trial waiver under the federal securities laws has not been finally adjudicated by a federal court. However, we believe that a jury trial waiver provision is generally enforceable under the laws of the State of New York, which govern the deposit agreement, by a court of the State of New York or a federal court, which have non-exclusive jurisdiction over matters arising under the deposit agreement, applying such law. In determining whether to enforce a jury trial waiver provision, New York courts and federal courts will consider whether the visibility of the jury trial waiver provision within the agreement is sufficiently prominent such that a party has knowingly waived any right to trial by jury. We believe that this is the case with respect to the deposit agreement and the ADSs. In addition, New York courts will not enforce a jury trial waiver provision in order to bar a viable setoff or counterclaim sounding in fraud or one which is based upon a creditor's negligence in failing to liquidate collateral upon a guarantor's demand, or in the case of an intentional tort claim (as opposed to a contract dispute), none of which we believe are applicable in the case of the deposit agreement or the ADSs. No condition, stipulation or provision of the deposit agreement or ADSs serves as a waiver by any holder or beneficial owner of ADSs or by us or the depositary of compliance with any provision of the federal securities laws. If you or any other holder or beneficial owner of ADSs brings a claim against us or the depositary in connection with such matters, you or such other holder or beneficial owner may not be entitled to a jury trial with respect to such claims, which may have the effect of limiting and discouraging lawsuits against us and/or the depositary. If a lawsuit is brought against us and/or the depositary under the deposit agreement, it may be heard only by a judge or justice of the applicable trial court, which would be conducted according to different civil procedures and may result in different outcomes than a trial by jury would have had, including results that could be less favorable to the plaintiff(s) in any such action, depending on, among other things, the nature of the claims, the judge or justice hearing such claims, and the venue of the hearing.

accounting firm determines we have a material weakness or significant deficiency in our internal control over financial reporting, we could lose investor confidence in the accuracy and completeness of our financial reports, the market price of our ADSs could decline, and we could be subject to sanctions or investigations by the New York Stock Exchange, the SEC or other regulatory authorities. Failure to remedy any material weakness in our internal control over financial reporting, or to implement or maintain other effective control systems required of public companies, could also restrict our future access to the capital market.

Our dividends are declared at the discretion of our board of directors. We declared an aggregate of £7.5 million and £18.2 million in dividends during the fiscal years ended June 30, 2015 and 2016. We did not pay any dividends in the fiscal years ended June 30, 2017 and 2018 and do not anticipate paying any dividends for the foreseeable future. We intend to retain all available funds and any future earnings for use in the operation and expansion of our business. Payment of cash dividends, if any, in the future will be at the discretion of our board of directors in compliance with applicable legal requirements and will depend on a number of factors, including future earnings, our financial condition, operating results, contractual restrictions, capital requirements, business prospects, our strategic goals and plans to expand our business, applicable law and other factors that our board of directors may deem relevant. In addition, our revolving credit facility with HSBC Bank PLC limits our ability to pay dividends, with certain exceptions. See “Risk Factors — We do not intend to pay dividends for the foreseeable future and, as a result, your ability to achieve a return on your investment will depend on appreciation in the price of our ADSs.”