

1.	Background and Basis of Presentation

Background

Mallinckrodt plc and its subsidiaries (collectively, "Mallinckrodt" or "the Company"), is a global business that develops, manufactures, markets and distributes specialty pharmaceutical products and therapies. Areas of focus include autoimmune and rare diseases in specialty areas like neurology, rheumatology, nephrology, pulmonology and ophthalmology; immunotherapy and neonatal respiratory critical care therapies; and analgesics and hemostasis products.

The Company operates in two reportable segments, which are further described below:


•	Specialty Brands includes branded medicines; and


•	Specialty Generics includes specialty generic drugs, active pharmaceutical ingredients ("API") and external manufacturing.

The Company owns or has rights to use the trademarks and trade names that are used in conjunction with the operation of its business. One of the more important trademarks that the Company owns or has rights to use that appears in this Quarterly Report on Form 10-Q is "Mallinckrodt," which is a registered trademark or the subject of pending trademark applications in the United States ("U.S.") and other jurisdictions. Solely for convenience, the Company only uses the ™ or ® symbols the first time any trademark or trade name is mentioned in the following notes. Such references are not intended to indicate in any way that the Company will not assert, to the fullest extent permitted under applicable law, its rights to its trademarks and trade names. Each trademark or trade name of any other company appearing in the following notes is, to the Company's knowledge, owned by such other company.

Basis of Presentation

The unaudited condensed consolidated financial statements have been prepared in U.S. Dollars and in accordance with accounting principles generally accepted in the U.S. ("GAAP"). The preparation of the unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amount of assets and liabilities, disclosure of contingent assets and liabilities and the reported amounts of net sales and expenses. Actual results may differ from those estimates. The unaudited condensed consolidated financial statements include the accounts of Mallinckrodt plc, its wholly-owned subsidiaries and entities in which they own or control more than fifty percent of the voting shares, or have the ability to control through similar rights. The results of entities disposed of are included in the unaudited condensed consolidated financial statements up to the date of disposal and, where appropriate, these operations have been reflected as discontinued operations. Divestitures of product lines and businesses that did not qualify as discontinued operations have been reflected in operating income. All intercompany balances and transactions have been eliminated in consolidation and, in the opinion of management, all normal recurring adjustments necessary for a fair presentation have been included in the interim results reported. The December 30, 2016 balance sheet data was derived from the unaudited condensed consolidated financial statements, but does not include all of the annual disclosures required by GAAP; accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the Company's audited annual consolidated and combined financial statements included in its Annual Report on Form 10-K for the period ended September 30, 2016, filed with the U.S. Securities and Exchange Commission ("SEC") on November 29, 2016.

The Company completed the sale of its Nuclear Imaging business on January 27, 2017. As a result, prior year balances have been recast to present the financial results of this business as a discontinued operation.

Fiscal Year

The Company historically reported its results based on a "52-53 week" year ending on the last Friday of September. On May 17, 2016, the Board of Directors of the Company approved a change in the Company’s fiscal year end to the last Friday in December from the last Friday in September. The change in fiscal year became effective for the Company’s 2017 fiscal year, which began on December 31, 2016 and will end on December 29, 2017. As a result of the change in fiscal year end, the Company filed a Transition Report on Form 10-Q on February 7, 2017 covering the period from October 1, 2016 through December 30, 2016. Unless otherwise indicated, the three and six months ended June 30, 2017 refers to the thirteen and twenty-six week period ended June 30, 2017 and the three and six months ended June 24, 2016 refers to the thirteen and twenty-six week period ended June 24, 2016.