We were incorporated in 2001 and commenced active operations in the same year. Our operations to date have been limited to organizing and staffing our company, business planning, raising capital, developing our TPE technology, identifying potential drug candidates, undertaking nonclinical studies and, beginning in 2010, conducting clinical trials, preparing for regulatory submissions and conductingpre-commercial activities. To date, we have financed our operations primarily through private placements, funding received from a licensing agreement, a loan agreement and our initial public offering. We have no products approved for sale and all of our historical revenue has been related to one license agreement, which was terminated in 2014. Since our inception and through June 30, 2018, we have raised an aggregate of $366.2 million to fund our operations, of which $86.3 million was through our license agreement with F.Hoffmann-La Roche Ltd. andHoffmann-La Roche Inc., collectively Roche, $106.5 million was from issuing shares of common stock in our initial public offering, or IPO, $161.4 million was from the issuance of private securities and $12.0 million was from borrowings under a loan agreement. In 2013, using proceeds from the Roche license agreement, we repaid all outstanding borrowings under our loan agreement and paid an aggregate of $55.0 million in cash as partial consideration for the redemption of certain shares of our redeemable preferred stock. As of June 30, 2018, our consolidated cash, cash equivalents and marketable securities were $54.6 million, of which $0.3 million was held by Chiasma (Israel) Ltd., our wholly owned Israeli subsidiary.
We have incurred significant operating losses since our inception. Our net loss was $15.7 million for the six months ended June 30, 2018 and $26.8 million for the year ended December 31, 2017. As of June 30, 2018, we had an accumulated deficit of $221.1 million. We expect to incur significant operating losses over the next several years. These losses, combined with prior losses, will continue to have an adverse effect on our cash resources, stockholders’ equity and working capital. We expect to continue to conduct the international Phase 3 MPOWERED clinical trial of octreotide capsules in acromegaly that we initiated in March 2016 to support potential regulatory approval in the European Union and our Phase 3 CHIASMA OPTIMAL clinical trial of octreotide capsules in acromegaly that we initiated in September 2017 to support potential regulatory approval in the United States. We expect the release oftop-line CHIASMA OPTIMAL data in the fourth quarter of 2019 and we expect to complete the MPOWERED trial in the fourth quarter of 2019 and releasetop-line data from this trial by early 2020. Clinical development timelines, the probability of success and development costs can differ materially from expectations.
In June and August 2016, we announced two separate corporate restructuring plans intended to focus our resources on the continued development of octreotide capsules for the maintenance treatment of adult acromegaly patients. As a result of the August 2016 reduction in workforce, we eliminated our research and discovery functions and are currently not investing in those areas. Because of the numerous risks and uncertainties facing our company and associated with developing and commercializing pharmaceutical products generally, we are unable to predict the extent of any future losses or when we will become profitable, if at all.
Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of equity offerings and debt financings, and we may also opportunistically consider license and collaboration agreements with potential partners. We may be unable to raise capital when needed or on attractive terms, or to enter into collaboration agreements, which could force us to delay, limit, reduce or terminate our product development or future commercialization efforts. We will need to generate significant revenues to achieve profitability, which we may not be able to achieve.
Roche License Agreement
In December 2012, we executed a license agreement with Roche, which went into effect on January 2013. Pursuant to the license agreement, we granted Roche an exclusive,non-transferable license to all intellectual property related to octreotide capsules. Under the terms of the license, Roche obtained worldwide rights to research, develop, make, import, export, sell, market or distribute the commercial product. We retained certain responsibilities for research and development activities under a joint development plan.
In July 2014, Roche terminated the license agreement. Pursuant to the termination of the license agreement, we are not entitled to further payments from Roche, Roche has no remaining rights to octreotide capsules and we retain all rights to octreotide capsules and all related intellectual property. Subsequent to the termination, we purchased from Roche active
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