Organization	6 Months Ended
Jun. 30, 2013
Organization
Organization	1. Organization Radius Health, Inc. (“Radius” or the “Company”), which was formerly known as MPM Acquisition Corp., is a biopharmaceutical company focused on developing new therapeutics for the treatment of osteoporosis and other women’s health conditions. The Company’s lead product candidate, currently in Phase 3 clinical development, is BA058-SC, a daily subcutaneous injection of novel synthetic peptide analog of human parathyroid hormone-related protein (“hPTHrP”) for the treatment of osteoporosis. The BA058-SC Phase 3 study began dosing patients in April 2011 and completed enrollment in March 2013. The Company is also developing BA058-TD, a short wear time, transdermal form of BA058 delivered using a microneedle patch technology from 3M Drug Delivery Systems (“3M”). The Company commenced a Phase 2 clinical study of BA058-TD during the third quarter of 2012 and completed patient visits in August 2013. The Company expects to receive the top-line data from this study in the third quarter of 2013. The Company also has two other product candidates, RAD1901, a selective estrogen receptor modulator, in Phase 2 clinical development for the treatment of vasomotor symptoms (hot flashes) in women entering menopause, and RAD140, a selective androgen receptor modulator, currently in preclinical development as a potential treatment for age-related muscle loss, frailty, and weight loss associated with cancer cachexia and osteoporosis. Pursuant to an Agreement and Plan of Merger (the “Merger Agreement” or the “Merger”) entered into in April 2011 by and among the Company (a public-reporting, Form 10 shell company at the time), RHI Merger Corp., a Delaware corporation and wholly owned subsidiary of the Company (“MergerCo”), and Radius Health, Inc., a privately-held Delaware corporation (“Former Operating Company”), MergerCo merged with and into the Former Operating Company, with the Former Operating Company remaining as the surviving entity and a wholly-owned subsidiary of the Company. This transaction is herein referred to as the “Merger.” The Merger was effective as of May 17, 2011, upon the filing of a certificate of merger with the Delaware Secretary of State. Following the Merger on May 17, 2011, the Company’s Board of Directors approved a transaction pursuant to which the Former Operating Company merged with and into the Company, leaving the Company as the surviving corporation (the Short-Form Merger”). As part of the Short-Form Merger, the Company, then named MPM Acquisition Corp., changed its name to Radius Health, Inc. and assumed the operations of the Former Operating Company. The Company is subject to the risks associated with emerging companies with a limited operating history, including dependence on key individuals, a developing business model, market acceptance of the Company’s product candidates, competition for its product candidates, and the continued ability to obtain adequate financing to fund the Company’s future operations. The Company has incurred losses and expects to continue to incur additional losses for the foreseeable future. As of June 30, 2013, the Company had an accumulated deficit of $235.6 million and believes that its cash and cash equivalents and marketable securities at June 30, 2013 are sufficient to fund its operations through the end of 2013. Accordingly, the Company expects to pursue financing opportunities to address its future capital needs, including the completion of an additional private placement or public offering and other strategic financing alternatives that could include, but are not limited to, partnering or other collaboration agreements. However, there is no guarantee that any of these financing opportunities will be executed or executed on favorable terms, and some could be dilutive to existing stockholders. If the Company fails to obtain additional future capital, it may be unable to complete its planned preclinical and clinical trials and obtain approval of any product candidates from the Federal Drug Administration or other regulatory authorities. In addition, the Company could be forced to discontinue product development, reduce or forego sales and marketing efforts, forego attractive business opportunities or discontinue operations entirely.

1. Organization

Radius Health, Inc. (“Radius” or the “Company”), which was formerly known as MPM Acquisition Corp., is a biopharmaceutical company focused on developing new therapeutics for the treatment of osteoporosis and other women’s health conditions. The Company’s lead product candidate, currently in Phase 3 clinical development, is BA058-SC, a daily subcutaneous injection of novel synthetic peptide analog of human parathyroid hormone-related protein (“hPTHrP”) for the treatment of osteoporosis. The BA058-SC Phase 3 study began dosing patients in April 2011 and completed enrollment in March 2013. The Company is also developing BA058-TD, a short wear time, transdermal form of BA058 delivered using a microneedle patch technology from 3M Drug Delivery Systems (“3M”). The Company commenced a Phase 2 clinical study of BA058-TD during the third quarter of 2012 and completed patient visits in August 2013. The Company expects to receive the top-line data from this study in the third quarter of 2013. The Company also has two other product candidates, RAD1901, a selective estrogen receptor modulator, in Phase 2 clinical development for the treatment of vasomotor symptoms (hot flashes) in women entering menopause, and RAD140, a selective androgen receptor modulator, currently in preclinical development as a potential treatment for age-related muscle loss, frailty, and weight loss associated with cancer cachexia and osteoporosis.

Pursuant to an Agreement and Plan of Merger (the “Merger Agreement” or the “Merger”) entered into in April 2011 by and among the Company (a public-reporting, Form 10 shell company at the time), RHI Merger Corp., a Delaware corporation and wholly owned subsidiary of the Company (“MergerCo”), and Radius Health, Inc., a privately-held Delaware corporation (“Former Operating Company”), MergerCo merged with and into the Former Operating Company, with the Former Operating Company remaining as the surviving entity and a wholly-owned subsidiary of the Company. This transaction is herein referred to as the “Merger.” The Merger was effective as of May 17, 2011, upon the filing of a certificate of merger with the Delaware Secretary of State. Following the Merger on May 17, 2011, the Company’s Board of Directors approved a transaction pursuant to which the Former Operating Company merged with and into the Company, leaving the Company as the surviving corporation (the Short-Form Merger”). As part of the Short-Form Merger, the Company, then named MPM Acquisition Corp., changed its name to Radius Health, Inc. and assumed the operations of the Former Operating Company.

The Company is subject to the risks associated with emerging companies with a limited operating history, including dependence on key individuals, a developing business model, market acceptance of the Company’s product candidates, competition for its product candidates, and the continued ability to obtain adequate financing to fund the Company’s future operations. The Company has incurred losses and expects to continue to incur additional losses for the foreseeable future. As of June 30, 2013, the Company had an accumulated deficit of $235.6 million and believes that its cash and cash equivalents and marketable securities at June 30, 2013 are sufficient to fund its operations through the end of 2013. Accordingly, the Company expects to pursue financing opportunities to address its future capital needs, including the completion of an additional private placement or public offering and other strategic financing alternatives that could include, but are not limited to, partnering or other collaboration agreements. However, there is no guarantee that any of these financing opportunities will be executed or executed on favorable terms, and some could be dilutive to existing stockholders. If the Company fails to obtain additional future capital, it may be unable to complete its planned preclinical and clinical trials and obtain approval of any product candidates from the Federal Drug Administration or other regulatory authorities. In addition, the Company could be forced to discontinue product development, reduce or forego sales and marketing efforts, forego attractive business opportunities or discontinue operations entirely.