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
exercise of options in Aerocrine the number of shares and votes in Aerocrine has
increased during August 2012 as specified in the table below.

                 Number of shares and votes
August 1, 2012   144 947 999
Increase         299 510
August 31, 2012  145 247 509

Solna October 31, 2012

Aerocrine AB (publ.)

For further information, please contact:

Michael Colérus, CFO, +46 8 629 07 85

About Aerocrine

Aerocrine AB is a medical technology company focused on the improved management
and care of patients with inflammatory airway diseases. The pioneer and leader
in the technology to monitor and manage airway inflammation, Aerocrine markets
NIOX MINO® and NIOX® Flex. Both products enable the fast and reliable
measurement of airway inflammation and may thus play a critical role in more
effective diagnosis, treatment and follow-up of patients with inflammatory
airway diseases such as asthma. Aerocrine is based in Sweden with subsidiaries
in the US, Germany and the UK. Aerocrine shares were listed on the Stockholm
Stock Exchange on 15 June 2007.

+------------------------------------------------------------------------------+
|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 October 31, 2012.|
+------------------------------------------------------------------------------+