The Company Also Launches First Interactive Annual Report and Provides First Quarter 2011 Reporting Date

BEVERLY, MA and TORONTO, Ontario – May 25, 2011 - Hamilton Thorne Ltd. (TSX-V: HTL), a leading provider of advanced laser systems for the regenerative medicine, fertility and stem cell research markets, today announced the Company will hold its Annual Meeting of Shareholders on Tuesday, June 14th, 2011 at 10:00 AM. The meeting will take place at 333 Bay Street, Suite 2900, Toronto, Ontario, M5H 2T4.

Hamilton Thorne has also launched its first Interactive Annual Report. The 2010 annual report can be found on the company’s investor relations Webpage, and features a video welcome message from CEO Meg Spencer, a corporate video and a photo gallery tour of Hamilton Thorne’s products, tradeshows, and employees. In addition, Hamilton Thorne has created “The Cell Colony,” a corporate blog that provides insights from the company's management team on important topics that are impacting stem cell research and the regenerative medicine industry, as well as fertility markets.

The Company expects to report its first quarter financial results for the three month period ended March 31, 2011 on Thursday, June 9, 2011. These financial statements will be reported for the first time under International Financial Reporting Standards ("IFRS"), which replaces Canadian Generally Accepted Accounting Policies ("GAAP") effective January 1, 2010 for all publically accountable enterprises in Canada. The Canadian Securities Administrators have granted an automatic 30-day extension to all issuers filing their first IFRS financial report.

About Hamilton Thorne Ltd. (www.hamiltonthorne.com)
Hamilton Thorne provides novel solutions for Life Science that reduce cost, increase productivity as much as ten-fold, and enable research breakthroughs in regenerative medicine, stem cell research and fertility markets. The Company’s new Staccato™ and Stiletto™ laser systems also offer significant scientific advantages in the fields of developmental biology, cancer research and advanced cell biology. Hamilton Thorne's laser products attach to standard inverted microscopes
and operate as robotic micro-surgeons, enabling a wide array of scientific applications and procedures. Each member of Hamilton Thorne’s family of products serves a different research purpose. By simply turning the microscope turret, researchers can have a new world of scientific capabilities at their fingertips.

Hamilton Thorne’s growing customer base includes pharmaceutical companies, biotechnology companies, fertility clinics, university research centers, and other commercial and academic research establishments worldwide. Current customers include world-leading research labs such as Harvard University, MIT, Yale, McGill University, DuPont, Monsanto, Charles River Labs, Jackson Labs, Merck, Novartis, Pfizer, Oxford University, and Cambridge.

Neither the Toronto Venture Exchange, nor its regulation services provider (as that term is defined in the policies of the exchange), accepts responsibility for the adequacy or accuracy of this release.

Certain information in this press release may contain forward-looking statements. This information is based on current expectations that are subject to significant risks and uncertainties that are difficult to predict. Actual results might differ materially from results suggested in any forward-looking statements. The Company assumes no obligation to update the forward-looking statements, or to update the reasons why actual results could differ from those reflected in the forward-looking statements unless and until required by securities laws applicable to the Company. Additional information identifying risks and uncertainties is contained in filings by the Company with the Canadian securities regulators, which filings are available at www.sedar.com.

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