Conference Call InformationTekmira will hold a conference call and webcast on Tuesday, August 14, 2012 at 1:30 pm Pacific Time (4:30 pm Eastern Time) to discuss its second quarter 2012 results and a summary of corporate highlights. To access the conference call, please dial 914-495-8556 or 1-866-393-1607 and reference conference ID 17538705. The live webcast can be accessed through the Investor section of Tekmira's website at www.tekmirapharm.com. An archived webcast will be available on the Tekmira website approximately two hours after the event. In addition, a replay of the conference call will be available until August 21, 2012 by calling 404-537-3406 or 1-855-859-2056 and referencing conference ID 17538705. About RNAi and Tekmira's LNP Technology RNAi therapeutics have the potential to treat a broad number of human diseases by "silencing" disease causing genes. The discoverers of RNAi, a gene silencing mechanism used by all cells, were awarded the 2006 Nobel Prize for Physiology or Medicine. RNAi therapeutics, such as "siRNAs," require delivery technology to be effective systemically. Tekmira believes its LNP technology represents the most widely adopted delivery technology for the systemic delivery of RNAi therapeutics. Tekmira's LNP platform is being utilized in multiple clinical trials by both Tekmira and its partners. Tekmira's LNP technology (formerly referred to as stable nucleic acid-lipid particles or SNALP) encapsulates siRNAs with high efficiency in uniform lipid nanoparticles that are effective in delivering RNAi therapeutics to disease sites in numerous preclinical models. Tekmira's LNP formulations are manufactured by a proprietary method which is robust, scalable and highly reproducible, and LNP-based products have been reviewed by multiple FDA divisions for use in clinical trials. LNP formulations comprise several lipid components that can be adjusted to suit the specific application. About Tekmira Tekmira Pharmaceuticals Corporation is a biopharmaceutical company focused on advancing novel RNAi therapeutics and providing its leading lipid nanoparticle delivery technology to pharmaceutical partners. Tekmira has been working in the field of nucleic acid delivery for over a decade and has broad intellectual property covering LNPs. Further information about Tekmira can be found at www.tekmirapharm.com. Tekmira is based in Vancouver, B.C. The Tekmira Pharmaceuticals logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=8319 Forward-Looking Statements and Information This news release contains "forward-looking statements" or "forward-looking information" within the meaning of applicable securities laws (collectively, "forward-looking statements"). Forward-looking statements are generally identifiable by use of the words "believes," "may," "plans," "will," "anticipates," "intends," "budgets," "could," "estimates," "expects," "forecasts," "projects" and similar expressions, and the negative of such expressions. Forward-looking statements in this news release include statements about Tekmira's strategy, future operations, clinical trials, prospects and the plans of management; RNAi (ribonucleic acid interference) product development programs; estimates of the number of clinical development programs to be undertaken by Tekmira and its product development partners; selection of additional product candidates; timing of release of clinical data; the quantum and timing of potential funding; use of lipid nanoparticle (LNP) technology by Tekmira's licensees; the effects of Tekmira's products on the treatment of elevated low-density lipoprotein (LDL) cholesterol, cancer, infectious disease and alcohol dependence; the ALN-VSP, ALN-TTR01, ALN-TTR02, and ALN-PCS product development programs of Alnylam Pharmaceuticals, Inc.; Tekmira's expectations with respect to existing and future agreements with third parties; statements and details of the TKM-PLK1 and TKM-Ebola Phase 1 human clinical trials; statements about the temporary stop work order received from the DoD with respect to our TKM-Ebola program; statements about the nature, prospects and anticipated timing to resolve the Tekmira's litigation with Alnylam and AlCana Technologies, Inc., including the patent infringement lawsuit; the nature, scope and quantum of damages sought by Tekmira from Alnylam and AlCana; statements about the injunction granted by the Supreme Court of British Columbia against certain individuals from AlCana; measures taken to ensure that Tekmira can pursue the litigation with Alnylam and AlCana without interruption to Tekmira's core business activities; statements about the USPTO patent interference proceedings between Alnylam and Tekmira; statements about Tekmira's expected revenue and expenses; estimates and scope of Tekmira's financial guidance and expected cash runway; and estimates of the length of time Tekmira's business will be funded by its anticipated financial resources.