EXHIBIT 99

This Current Report on Form 8-K includes supplemental unaudited historical business segment net sales and operating income information that reflects a product line reporting change involving two of its business segments (provided on an annual and quarterly basis for the years ended December 31, 2015, 2014 and 2013). The Company did not operate under this structure for any of these prior periods and will begin to report comparative results under the new structure with the filing of its Quarterly Report on Form 10-Q for the quarter ending March 31, 2016.

Effective in the first quarter of 2016, 3M changed its business segment reporting in its continuing effort to improve the alignment of its businesses around markets and customers.

The change between business segments was as follows:

The financial information presented herein reflects the impact of the preceding changes for all periods presented. The impact of this change on previously reported 2015 business segment net sales and operating income is summarized as follows:

3M’s businesses are organized, managed and internally grouped into segments based on differences in markets, products, technologies and services. 3M manages its operations in five business segments: Industrial; Safety and Graphics; Health Care; Electronics and Energy; and Consumer. 3M’s five business segments bring together common or related 3M technologies, enhancing the development of innovative products and services and providing for efficient sharing of business resources. Transactions among reportable segments are recorded at cost. 3M is an integrated enterprise characterized by substantial intersegment cooperation, cost allocations and inventory transfers. Therefore, management does not represent that these segments, if operated independently, would report the operating income information shown.

Corporate and unallocated operating income includes a variety of miscellaneous items, such as corporate investment gains and losses, certain derivative gains and losses, certain insurance-related gains and losses, certain litigation and environmental expenses, corporate restructuring charges and certain under- or over-absorbed costs (e.g. pension, stock-based compensation) that the Company may choose not to allocate directly to its business segments. Because this category includes a variety of miscellaneous items, it is subject to fluctuation on a quarterly and annual basis.

3M business segment reporting measures include dual credit to business segments for certain U.S. sales and related operating income. Management evaluates each of its five business segments based on net sales and operating income performance, including dual credit U.S. reporting to further incentivize U.S. sales growth. As a result, 3M provides additional (“dual”) credit to those business segments selling products in the U.S. to an external customer when that segment is not the primary seller of the product. For example, certain respirators are primarily sold by the Personal Safety Division within the Safety and Graphics business segment; however, the Industrial business segment also sells this product to certain customers in its U.S. markets. In this example, the non-primary selling segment (Industrial) would also receive credit for the associated net sales it initiated and the related approximate operating income. The assigned operating income related to dual credit activity may differ from operating income that would result from actual costs associated with such sales. The offset to the dual credit business segment reporting is reflected as a reconciling item entitled “Elimination of Dual Credit,” such that sales and operating income for the U.S. in total are unchanged. 

Supplemental Unaudited Business Segment Information

Based on Segment Structure Effective in the First Quarter of 2016

Net Sales 

Supplemental Unaudited Business Segment Information

Based on Segment Structure Effective in the First Quarter of 2016

Operating Income