Major Shareholdings

THIS ANNOUNCEMENT IS NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, IN, INTO OR FROM THE UNITED STATES OF AMERICA, JAPAN, CANADA OR AUSTRALIA OR ANY OTHER JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A BREACH OF THE RELEVANT SECURITIES LAWS OF SUCH JURISDICTION. 

TyraTech Inc.

("TyraTech" or "the Company")

21 December 2010

Major Shareholdings

Tyratech Inc. (AIM:TYR), a leading independent novel eco-technology company for human, animal and environmental health, announces that Petrotech Holdings which holds shares in the Company on behalf of Laurus, the Company's largest shareholder prior to the Placing announced earlier today (the "Placing"), have today disposed of their entire holding of common shares in the Company having represented a beneficial interest in 10,542,681 common shares, or 22.34% of the issued share capital pre Placing.

Laurus and its affiliate funds no longer have any holding in the Company.

The Company also announces that Fiske Nominees has reduced its holding in the Company from 7,053,889 common shares, representing 14.95% of the issued share capital prior to the Placing, to 4,453,889 common shares representing 8.59% of the share capital post the Placing.

The common shares disposed of by both Petrotech and Fiske have been acquired by a number of Institutional clients.

In each case the purchase price of the shares was 30 pence per share.

For further information please contact:

TyraTech Inc.

Alan Reade, Executive Chairman +1 321 409 7731

www.tyratech.com

Brewin Dolphin

Matt Davis +44 (0)113 241 0138

Iain Marlow

www.brewincorporate.co.uk