ALISO VIEJO, CA (June 1, 2015) – MicroVention, Inc., a wholly owned subsidiary of Terumo Corporation and a global neurovascular company, announced today that it will build its new 205,000 square-foot worldwide headquarters at the Summit Office Campus in Aliso Viejo, CA, the city where the Company was originally founded.

A groundbreaking ceremony to commemorate the start of construction will be held at 10:00 a.m., Thursday, June 4, 2015 on the site where the new headquarters building will be constructed. Construction on the four-story, 205,000-square-foot office complex is set to begin in June 2015, with occupancy scheduled for the first half of January 2017. The new building will house more than 800 employees on the 5.13 acre site, which also includes an 822-stall parking structure.

This new facility will consolidate MicroVention operations into one building and is expected to support the growth and expansion of products offered under the MicroVention and Terumo brands for the foreseeable future. The new worldwide headquarters building will house the Company’s corporate finance and administrative functions, global marketing and sales activities, research and development center and manufacturing, which includes expansive clean room facilities.

“We are very excited about the initiation and development of this new “Innovation Center” for MicroVention and to be commemorating the start of its construction with a special groundbreaking ceremony,” said Richard Cappetta, President and Chief Executive officer of MicroVention, Inc. “Participating in our ground breaking ceremony will be many of our local Company partners from Aliso Viejo, and Mr. Yutaro Shintaku, President and Representative Director for Terumo Corporation located in Tokyo.”

MicroVention is one of the leaders in its field focused on the development of catheter-based minimally-invasive neuroendovascular devices and technologies to treat cerebral aneurysms and other neurovascular diseases. MicroVention sets the standard for excellence in its industry and is committed to developing and manufacturing the highest quality products for its customers and patients, while maintaining a strong Clinical Research and Research and Development focus, to quickly respond to customer needs and advance therapeutic modalities.

About MicroVention, Inc.

MicroVention, Inc. is a U.S. subsidiary of Terumo Corporation with its corporate headquarters in Tustin, California, and manufacturing and administrative facilities in Santa Ana and Aliso Viejo, California, and San José, Costa Rica. MicroVention is a developer, manufacturer and marketer of innovative neuroendovascular technologies for the treatment of vascular diseases in small vessels. MicroVention products are sold throughout the world in more than 70 countries. For more information, visit www.microvention.com.

About Terumo Corporation

Tokyo-based Terumo Corporation is one of the world’s leading medical device manufacturers with $4.5 billion in sales (as of March 31, 2015) and operations in more than 160 nations. Founded in 1921, the company develops, manufactures and distributes world-class medical devices including products for use in cardiothoracic surgery, interventional procedures and transfusion medicine; the company also manufactures a broad array of syringe and hypodermic needle products for hospital and physician office use. Terumo contributes to society by providing valued products and services to the health care market and by responding to the needs of health care providers and the people they serve. Terumo Corporation’s shares are listed on the first section of the Tokyo Stock Exchange (No. 4543, Reuters symbol , or Bloomberg 4543: JP) and is a component of the Nikkei 225, Japan’s leading stock index.

MicroVention Contact:

Cathy Demyanovich

Sr. Director, Corporate Communications/MicroVention, Inc.

714-247-8000

cathy.demyanovich@microvention.com

Media Contact:

Len Hall

Allen & Caron

949-474-4300 l

en@allencaron.com

Please Note: Architectural renderings of MicroVention’s new worldwide headquarters building and aerial views of the Summit Campus site are available in high resolution JPEG format upon request. Please contact Len Hall at the telephone number or e-mail address above.