Medidata Schedules First Quarter Earnings Conference Call for April 23, 2015

Medidata (NASDAQ:MDSO), the leading global provider of cloud-based solutions for clinical research in life sciences, today announced that it will release its first quarter 2015 financial results before the open of the market on Thursday, April 23, 2015. Tarek Sherif, chief executive officer, and Cory Douglas, chief financial officer, will also hold a conference call at 8:00 a.m. ET for investors and analysts to discuss the Company’s results and business outlook.

To participate by telephone, domestic participants may dial 1-877-303-2528 and international participants may dial 1-847-829-0023. Those interested in participating in the conference call should dial in at least 10 minutes prior to the call to register.

Participants can also join the call via a simultaneous live audio webcast, which will be made available on the “Investor” section of Medidata’s website, http://investor.mdsol.com.

A replay of the conference call can be accessed through May 7, 2015, by dialing 1-800-585-8367 domestically or 1-404-537-3406 internationally, with the passcode 16539923. An archive of the call will also be hosted on the “Investor” section of Medidata’s website, http://investor.mdsol.com, for a limited period of time.

About Medidata Solutions

Medidata Solutions is the leading global provider of cloud-based solutions for clinical research in life sciences, transforming clinical development through its advanced applications and intelligent data analytics. The Medidata Clinical Cloud® brings new levels of productivity and quality to the clinical testing of promising medical treatments, from study design and planning through execution, management and reporting. We are committed to advancing the competitive and scientific goals of global customers, which include over 90% of the top 25 global pharmaceutical companies; innovative biotech, diagnostic and device firms; leading academic medical centers; and contract research organizations.