9. Commitments and Contingencies The Company has an operating lease for office and laboratory space located in Bridgewater, NJ, its corporate headquarters, for which the initial lease term expires in November 2019. Future minimum rental payments under this lease are $2.5 million. In July 2016, the Company signed an operating lease for additional laboratory space located in Bridgewater, NJ for which the initial lease term expires in December 2021. Future minimum rental payments under this lease are $2.1 million. Rent expense charged to operations was $0.3 million for both the three months ended June 30, 2017 and 2016, and $0.7 million and $0.5 million for the six months ended June 30, 2017 and 2016, respectively. Future minimum rental payments required under the Companys operating leases for the period from July 1, 2017 to December 31, 2017 and for each of the five years thereafter are as follows (in thousands): Year Ending December 31: 2017 (remaining) $ 753 2018 1,519 2019 1,421 2020 477 2021 498 2022  $ 4,668 Legal Proceedings On July 15, 2016, a lawsuit captioned Hoey v. Insmed Incorporated, et al, No. 3:16-cv-04323-FLW-TJB (D.N.J. July 15, 2016) was filed in the US District Court for the District of New Jersey on behalf of a putative class of investors who purchased the Companys common stock from March 18, 2013 through June 8, 2016. The complaint alleged that the Company and certain of its executives violated Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 (Exchange Act) by misrepresenting and/or omitting the likelihood of the European Medicines Agency approving the Companys European marketing authorization application for use of ALIS in the treatment of NTM lung disease and the likelihood of commercialization of ALIS in Europe. On October 25, 2016, the Court issued an order appointing Bucks County Employees Retirement Fund as lead plaintiff for the putative class. On December 15, 2016, the lead plaintiff filed an amended complaint that shortens the putative class period for the Exchange A