

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 branded and generic specialty pharmaceutical and biopharmaceutical products and therapies and nuclear medicine products. Therapeutic areas of focus include autoimmune and rare disease specialty areas (including neurology, rheumatology, nephrology and pulmonology); immunotherapy and neonatal critical care respiratory therapies; hemostasis products; and central nervous system drugs. The Company also supports the diagnosis of disease with nuclear medicine products.

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


•	Specialty Brands produces and markets branded pharmaceutical and biopharmaceutical products and therapies;


•	Specialty Generics produces specialty generic pharmaceuticals and active pharmaceutical ingredients ("API") consisting of biologics, medicinal opioids, synthetic controlled substances, acetaminophen and other active ingredients; and


•	Nuclear Imaging manufactures and markets radiopharmaceuticals (nuclear medicine).

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 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 discussion 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 revenues 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 fiscal year-end balance sheet data was derived from audited consolidated financial statements, but do 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 25, 2015, filed with the SEC on November 24, 2015.

The Company completed the sale of the contrast media and delivery systems ("CMDS") business on November 27, 2015. As a result, prior year balances have been recast to present the CMDS business as a discontinued operation.

Beginning in the first quarter of fiscal year 2016, the Company revised the presentation of certain medical affairs costs to better align with industry practice, which were previously included in selling, general and administrative ("SG&A") expenses and are now included in research and development ("R&D") expenses. As a result, $12.3 million and $23.5 million of expenses previously included in SG&A for the three and six months ended March 27, 2015, respectively, have been classified as R&D expenses to conform to this change. No other financial statement line items were impacted by this change in classification.

Fiscal Year

The Company reports its results based on a "52-53 week" year ending on the last Friday of September. The second fiscal quarters of 2016 and 2015 ended on March 25, 2016 and March 27, 2015, respectively. Unless otherwise indicated, the three and six months ended March 25, 2016 refers to the thirteen and twenty-six week period ended March 25, 2016 and the three and six months ended March 27, 2015 refers to the thirteen and twenty-six week period ended March 27, 2015. The full year fiscal 2015 consisted of 52 weeks, while fiscal 2016 will consist of 53 weeks and will end on September 30, 2016.