UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D. C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): January 31, 2019

ARRIS INTERNATIONAL PLC

(Exact Name of Registrant as Specified in Its Charter)

Registrant’s telephone number, including area code: (678) 473-2000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act or Rule 12b-2 of the Exchange Act.

Emerging growth company ¨

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

On January 30, 2019, the waiting period expired under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, with respect to the previously announced acquisition of ARRIS International plc (“ARRIS” or the “Company”) by CommScope Holding Company, Inc. (“CommScope”), pursuant to the Bid Conduct Agreement (the “Acquisition Agreement”), dated as of November 8, 2018, by and between ARRIS and CommScope, pursuant to which CommScope has agreed to acquire all of the issued and to be issued ordinary shares, £0.01 nominal value per share (the “Ordinary Shares”), of ARRIS (the “Acquisition”) for $31.75 per Ordinary Share by means of a court-sanctioned scheme of arrangement (the “Scheme”) under Part 26 of the U.K. Companies Act 2006.

The consummation of the Acquisition remains subject to various closing conditions, including, among other things, (i) the receipt of certain approvals of the Company shareholders, (ii) the sanction of the Scheme by the High Court of Justice of England and Wales (the “Court”), (iii) the receipt of the remaining regulatory approvals or lapse of certain review periods with respect thereto, (iv) the absence of a Company Material Adverse Effect (as defined in the Acquisition Agreement), (v) the accuracy of representations and warranties (subject, in certain cases, to certain materiality or Company Material Adverse Effect qualifiers, as applicable) and (vi) the absence of legal restraints prohibiting or restraining the Acquisition.

Forward-Looking Statements

This Current Report includes forward-looking statements that reflect the current views of ARRIS with respect to future events and financial performance, including the proposed Acquisition. These statements may discuss goals, intentions or expectations as to future plans, trends, events, results of operations or financial condition or otherwise, in each case, based on current beliefs of the ARRIS management, as well as assumptions made by, and information currently available to, such management. These forward-looking statements are generally identified by their use of such terms and phrases as “intend,” “goal,” “estimate,” “expect,” “project,” “projections,” “plans,” “potential,” “anticipate,” “should,” “could,” “designed to,” “foreseeable future,” “believe,” “think,” “scheduled,” “outlook,” “target,” “guidance” and similar expressions, although not all forward-looking statements contain such terms. This list of indicative terms and phrases is not intended to be all-inclusive.

These forward-looking statements are subject to various risks and uncertainties, many of which are outside of the control of ARRIS, including, without limitation: failure to obtain applicable regulatory approvals in a timely manner, on acceptable terms or at all, or to satisfy the other closing conditions to the proposed transactions; the risk that ARRIS will be required to pay the termination fee under the Acquisition Agreement; the potential impact of announcement or consummation of the proposed acquisition on relationships with third parties, including customers, employees and competitors; uncertainties as to the timing of the transaction; the possibility that competing offers will be made; any statements of belief and any statements of assumptions underlying any of the foregoing; and other factors beyond the control of ARRIS.

These and other factors are discussed in greater detail in the reports filed by ARRIS with the U.S. Securities and Exchange Commission, including ARRIS’s Quarterly Report on Form 10-Q for the period ended September 30, 2018. Although the information contained in this Current Report represents the best judgment of ARRIS as of the date of this Current Report based on information currently available and reasonable assumptions, ARRIS cannot give any assurance that the expectations will be attained or that any deviation will not be material. Given these uncertainties, ARRIS cautions you not to place undue reliance on these forward-looking statements, which speak only as of the date made. ARRIS disclaims any duty or obligation to update this information to reflect developments or information obtained after the date of this report, except as otherwise may be required by law.

Important Additional Information Regarding the Transaction and Where to Find It

In connection with the proposed transaction, ARRIS filed the Proxy Statement and forms of proxy with the SEC on December 19, 2018, which has been mailed to the ARRIS shareholders. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE PROXY STATEMENT AND OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE TRANSACTION CAREFULLY AND IN THEIR ENTIRETY, BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT THE TRANSACTION, THE PARTIES TO THE TRANSACTION AND THE RISKS ASSOCIATED WITH THE TRANSACTION. Those documents, as well as ARRIS’s other public filings with the SEC may be obtained without charge at the SEC’s web site, http://www.sec.gov, or at ARRIS’s website at http://ir.arris.com. Security holders and other interested parties will also be able to obtain, without charge, a copy of the proxy statement and other relevant documents by directing a request by mail to ARRIS Investor Relations, 3871 Lakefield Drive, Suwanee, GA 30024 or at http://ir.arris.com.

Participants in the Solicitation

ARRIS, its directors and certain of its executive officers may be considered participants in the solicitation of proxies in connection with the transactions contemplated by the Proxy Statement. Information about the directors and executive officers of ARRIS is set forth in its Annual Report on Form 10-K for the year ended December 31, 2017, which was filed with the SEC on March 1, 2018, and its proxy statement for its 2018 annual meeting of shareholders, which was filed with the SEC on March 23, 2018. Other information regarding potential participants in the proxy solicitations and a description of their direct and indirect interests, by security holdings or otherwise, are contained in the Proxy Statement filed on December 19, 2018.

ARRIS is organized under the laws of England and Wales. Some of the officers and directors of ARRIS are residents of countries other than the United States. As a result, it may not be possible to sue ARRIS or such persons in a non-US court for violations of US securities laws. It may be difficult to compel ARRIS and its affiliates to subject themselves to the jurisdiction and judgment of a US court or for investors to enforce against them the judgments of US courts.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: January 31, 2019