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): November 26, 2014

PERRIGO COMPANY PLC

(Exact name of registrant as specified in its charter)

Commission file number 001-36353

+353 1 7094000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

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 (see General Instruction A.2. below):

On November 26, 2014, Perrigo Company plc (the “Company”) issued a press release announcing the closing of the Company’s registered public offering, previously announced in its Current Report on Form 8-K filed on November 20, 2014, relating to the sale of 6,809,210 ordinary shares at a public offering price of $152.00 per share, including the full exercise of the option to purchase up to an additional 888,157 ordinary shares by J.P. Morgan Securities LLC and Barclays Capital Inc., as representatives of the several underwriters. A copy of the November 26, 2014 press release is included as Exhibit 99.1 hereto. The legal opinion related to the offering is attached hereto as Exhibit 5.1 and is incorporated herein by reference.

(d) Exhibits

No Offer or Solicitation

This Form 8-K does not constitute an offer to sell, or an invitation to subscribe for, purchase or exchange, any securities, nor shall there be any sale, issuance, exchange or transfer of the securities referred to in this announcement in any jurisdiction in contravention of applicable law.

Cautionary Statement Regarding Forward-Looking Statements

This Form 8-K includes certain “forward looking statements” within the meaning of, and subject to the safe harbor created by, Section 21E of the Securities Exchange Act of 1934, as amended, with respect to the business, strategy and plans of the Company, its expectations and its future financial condition and performance. Statements that are not historical facts, including statements about the Company’s managements’ beliefs and expectations, are forward looking statements. Words such as “may,” “will,” “could,” “would,” “should,” “expect,” “plan,” “anticipate,” “intend,” “believe,” “estimate,” “predict,” “potential” or the negative of those terms or other comparable terminology are intended to identify forward looking statements but are not the exclusive means of identifying such statements. While the Company believes these expectations, assumptions, estimates and projections are reasonable, such forward-looking statements are only predictions and involve known and unknown risks and uncertainties, many of which are beyond the Company’s control. By their nature, forward looking statements involve risk and uncertainty because they relate to events and depend upon future circumstances that may or may not occur. Actual results may differ materially from the Company’s current expectations depending upon a number of factors affecting the Company’s business. These factors include, among others, the inherent uncertainty associated with financial projections; successful completion of the transactions contemplated herein; the risks and uncertainties normally incident to the pharmaceutical industry, including product liability claims and the availability of product liability insurance; market acceptance of and continued demand for the Company’s products; changes in tax laws or interpretations that could increase the Company’s tax liabilities; and such other risks and uncertainties detailed in the Company’s periodic public filings with the SEC, including but not limited to those discussed under “Risk Factors” in the Company’s Form 10-K for the fiscal year ended June 28, 2014, in the subsequent filings with the SEC and in other investor communications of the Company from time to time. The forward-looking statements in this document are made only as of the date hereof, and unless otherwise required by applicable securities laws, the Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Signature

Pursuant to the requirement 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.

Dated: November 26, 2014

Exhibit Index