Migration of Shares

TyraTech, Inc.

("TyraTech" or the "Company")

Migration of Shares

TyraTech, Inc. (AIM: TYR and TYRU), a life sciences company focusing on nature-derived insect and parasite control products, announces that 100,000 common shares in the Company on its restricted "TYR" trading line have migrated to its unrestricted trading line "TYRU".

Following the migration of these shares, the Company will continue to have a total of 262,333,111 common shares admitted to AIM (excluding those shares admitted and not allotted under the blocklisting announced on 25 February 2011), of which 138,566,222 will continue to trade under the symbol "TYR" in a restricted manner as permitted by Regulation S of the U.S. Securities Act of 1993 (the "Securities Act") and 123,766,889 will trade under the symbol "TYRU" in an unrestricted manner pursuant to an exemption provided under the Securities Act. CREST settlement will not be available for trades in "TYR" shares. The Company holds 1,084,413 common shares in treasury and these treasury shares are listed on the restricted "TYR" trading line.

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