McKesson Announces Final Voting Results from 2017 Annual Meeting of Stockholders

San Francisco, CA., July 28, 2017 — McKesson Corporation (NYSE:MCK) today announced results from its recent proxy vote, available in the Form 8-K filed with the Securities and Exchange Commission. McKesson’s shareholders reelected all board members by wide margins. While the shareholders did not support the current executive compensation program, they defeated shareholder proposals on an independent chair and on written consent by significant margins.

Chief Executive Officer and Chairman John H. Hammergren received strong support from shareholders as the chair of the Board with a 96.5% approval and with the defeat of the shareholder proposal to split the CEO and chair roles.

Regarding executive compensation, the Board’s Compensation Committee plans to conduct a thorough review of the current program, have discussions with shareholders about any recommended changes and, as evidenced over the years, continue to make changes designed to further drive alignment between our incentives and shareholder value creation.

“We value our shareholders’ feedback as we work to deliver ever-increasing value to our investors and our customers,” said Mr. Hammergren. “I am incredibly proud of the 70,000 McKesson employees who work every day to deliver better health to our customers and the patients they serve.”

About McKesson Corporation

McKesson Corporation, currently ranked 5^th on the FORTUNE 500, is a global leader in healthcare supply chain management solutions, retail pharmacy, community oncology and specialty care, and healthcare information technology. McKesson partners with pharmaceutical manufacturers, providers, pharmacies, governments and other organizations in healthcare to help provide the right medicines, medical products and healthcare services to the right patients at the right time, safely and cost-effectively. United by our ICARE shared principles, our employees work every day to innovate and deliver opportunities that make our customers and partners more successful—all for the better health of patients. McKesson has been named the “Most Admired Company” in the healthcare wholesaler category by FORTUNE, a “Best Place to Work” by the Human Rights Campaign Foundation, and a top military-friendly company by Military Friendly. For more information, visit www.McKesson.com.