Change in number of shares and votes in Aerocrine

With reference to Chapter 4 Section 9 in ”lagen (1991:980) om handel med
finansiella instrument” it’s hereby announced that through the subscription by a
new share issue in Aerocrine the number of shares and votes in Aerocrine has
increased during May 2013 as specified in the table below.

              Number of shares and votes
May 1, 2013   145 956 405
Increase      8 625 000
May 31, 2013  154 581 405

Solna May 31, 2013

Aerocrine AB (publ.)

For further information, please contact:

Michael Colérus, CFO, +46 8 629 07 85

About Aerocrine

Aerocrine AB is a medical products company focused on improved management and
care of patients with inflammatory airway diseases such as Asthma. Within this
sector, Aerocrine is the world leader. Aerocrine markets NIOX MINO®, which
enables fast and reliable point-of-care measurement of airway inflammation. This
product plays a critical role in more effective diagnosis, treatment and follow
-up of patients affected with inflammatory airway diseases. Aerocrine is based
in Sweden with subsidiaries in the US, Germany, Switzerland and the UK.
Aerocrine shares have been listed on the Stockholm Stock Exchange since 2007
(AERO-B.ST). For more information please visit www.aerocrine.com and
www.niox.com.

+------------------------------------------------------------------------------+
|Aerocrine may be required to disclose the information provided herein pursuant|
|to the Securities Markets Act and/or the Financial Instruments Trading Act.   |
|The information was submitted for publication at 08:00 am on May 31, 2013.    |
+------------------------------------------------------------------------------+