GI Dynamics, Inc. - News Release

NOT FOR IMMEDIATE RELEASE

GI Dynamics to Hold Briefing Call and Webcast on Financial Results for Second Quarter 2014 LEXINGTON, Massachusetts & SYDNEY, Australia - 21 July 2014 - GI Dynamics,

Inc.(ASX: GID) will hold a conference call to discuss the company's financial results for the second quarter and six months ended 30 June 2014, and its business outlook. Stuart Randle, president and chief executive officer, will host the call with Robert Crane, chief financial officer.

The company will file its Appendix 4C with the ASX on Thursday, 31 July 2014 (AEDT). The briefing call to discuss financial results and business updates will be held at 6 p.m. U.S. EDT on Monday, 4 August 2014 (8 a.m. AEST on Tuesday, 5 August 2014).

Accessing the Briefing Call via Webcast:

A live webcast of the call will be available on the GI Dynamics website at investor.gidynamics.com. The webcast can be directly accessed at: http://edge.media-server.com/m/p/iygafe23/lan/en

Accessing the Briefing Call via Telephone:

For those preferring to listen by telephone, please dial in five minutes prior to the start of the call and provide the passcode 37479727. Regional dial-in numbers are as follows:
• United States callers please dial toll-free 1 (888) 771-4371
• Australia callers please dial toll-free 1 (800) 507-265
• International callers please dial 1 (847) 585-4405

Replay archive:

The webcast will be archived for 30 days following the call on the GI Dynamics website at investor.gidynamics.com.

About GI Dynamics

GI Dynamics, Inc. (ASX: GID) is the developer of EndoBarrier®, the first endoscopically-delivered device therapy approved for the treatment of type 2 diabetes and/or obesity. EndoBarrier is approved and commercially available in multiple countries outside the U.S. EndoBarrier is not approved for sale in the U.S. and is limited by

federal law to investigational use only in the United States. GI Dynamics is conducting a pivotal clinical trial

of EndoBarrier in the U.S. for the treatment of patients who have uncontrolled type 2 diabetes and are

obese. Founded in 2003, GI Dynamics is headquartered in Lexington, Massachusetts. For more information, please visit www.gidynamics.com.

Investor Enquiries: Media Enquiries:

United States

Robert Crane, Chief Financial Officer

+1 (781) 357-3250

United States/Europe:

Dan Budwick, Pure Communications Inc.

+1 (973) 271-6085

Australia

David Allen or John Granger, Hawkesbury Partners

Pty Limited

+61 2 9325 9046

Australia

Angela Ceberano, Flourish PR

+61 3 9092 8445

www.gidynamics.com

US OFFICE & HEADQUARTERS: 25 Hartwell Avenue, Lexington MA 02421 T +1 (781) 357-3300 F +1 (781) 357-3301

EUROPEAN OFFICE: De Tweeling 20-22 's-Hertogenbosch 5215 MC, THE NETHERLANDS T: + 31 13 547 9300

AUSTRALIAN OFFICE: Level 8, 17-19 Bridge Street, Sydney, NSW 2000 T +61 2 9325 9046

GI Dynamics, Inc., is a corporation incorporated in Delaware, USA, whose stockholders have limited liability. ARBN 151 239 388

distributed by