Medidata Solutions to Host Financial Analyst Day in New York City on November 12

FOR IMMEDIATE RELEASE

Medidata Solutions to Host Financial Analyst Dayin New York City on November 12

NEW YORK, N.Y. – October 15, 2012 – Medidata Solutions (NASDAQ: MDSO), a leading global provider of cloud-based clinical development solutions, today announced that it will host a financial analyst day on Monday, November 12, 2012 in New York City. The management team will discuss Medidata?s product vision and long-term growth strategy and provide product demos.

The event will be webcast from approximately 1:30 pm–4:30 pm EST. The live webcast will be available on the ?Investor? section of Medidata?s website at http://investor.mdsol.com. Please visit the website at least 15 minutes prior to the event to register, download and install any necessary audio or video software to access the presentation. For those unable to participate in the live webcast, a replay will be archived on the ?Investor? section of Medidata?s website at http://investor.mdsol.com for a period of time following the event.

About Medidata Solutions Worldwide
Medidata Solutions is a leading global provider of cloud-based clinical development solutions that enhance the efficiency of customers? clinical trials. Medidata?s advanced platform lowers the total cost of clinical development by optimizing clinical trials from concept to conclusion: from study and protocol design, trial planning and budgeting, site negotiation, clinical portal, trial management, randomization and trial supply management, clinical data capture and management, safety events capture, medical coding to business analytics. Our diverse life science customer base spans biopharmaceutical companies, medical device and diagnostic companies, academic and government institutions, CROs and other research organizations, and includes more than 20 of the top 25 global pharmaceutical companies as well as organizations of all sizes developing life-enhancing medical treatments and diagnostics.

Investor Contact:
Hulus Alpay
Medidata Solutions
212.419.1025
halpay@mdsol.com

Media Contact:
Susan McCarron
Lois Paul and Partners
617.986.5767
Susan_McCarron@lpp.com