We are a clinical stage pharmaceutical company focused on developing and commercializing innovative therapeutics to treat patients suffering from rare seizure disorders. Our clinical stage product candidate, ganaxolone, is a positive allosteric modulator of GABA_A that is being developed in formulations for two different routes of administration: intravenous (IV) and oral. Ganaxolone is a synthetic analog of allopregnanolone, an endogenous neurosteroid. The different formulations are intended to maximize potential therapeutic applications of ganaxolone for adult and pediatric patient populations, in both acute and chronic care, and for both in-patient and self-administered settings. Ganaxolone acts at both synaptic and extrasynaptic GABA_A receptors, a target known for its anti-seizure, antidepressant and anxiolytic potential.

In December 2019, an outbreak of a novel strain of coronavirus (COVID-19) was identified in Wuhan, China. This virus was declared a pandemic by the World Health Organization in March 2020 and has spread to nearly every country in the world, including the United States (U.S.). Efforts to contain the spread of COVID-19 have intensified and many countries, including the U.S., have implemented severe travel restrictions, business shutdowns and social distancing measures that have impacted clinical development through supply chain shortages and clinical trial enrollment difficulties as hospitals reduce and redeploy staff, divert resources to patients suffering from COVID-19 and limit hospital access for non-patients. The pandemic poses the risk that we, our employees, contractors, suppliers, or other partners may be prevented from conducting normal business activities for an indefinite period of time, including those due to shutdowns that may be requested or mandated by governmental authorities.

The continued global spread of COVID-19 has impacted our operations but did not have a material impact on our business, operating results, financial condition or cash flows as of and for the three months ended March 31, 2021. For example, several of our Phase 1 trials of oral ganaxolone to support the development of CDD have experienced delays in enrollment due to COVID-19; however we do not expect these delays to impact our ability to file an NDA. Further, in response to COVID-19, for our ongoing clinical trials, we have implemented multiple measures consistent with the U.S. Food and Drug Administration’s guidance on the conduct of clinical trials of medical products during the COVID-19 pandemic, including implementing remote site monitoring and remote visits using telemedicine where needed. However, COVID-19 may still adversely impact our clinical trials. For example, our Phase 3 clinical trial in RSE is conducted in hospitals and resources related to the COVID-19 outbreak may divert staffing in hospitals, taking resources away from our clinical trial. Our ganaxolone clinical trials in the outpatient setting may be negatively impacted if patients and their caregivers do not want to participate in a clinical trial while COVID-19 outbreaks continue. Although operations have not been materially affected by the COVID-19 pandemic as of and for the three months ended March 31, 2021, we are unable to predict the impact that COVID-19 will have in the future on our business, financial position, operating results and cash flows due to numerous uncertainties. The duration and severity of the pandemic and its long-term impact on our business are uncertain at this time, and our ability to raise sufficient additional financing depends on many factors beyond our control, including the current volatility in the capital markets as a result of the COVID-19 pandemic.

We have not generated any product revenues and have incurred operating losses since inception, including losses of $27.1 million for the three months ended March 31, 2021. There is no assurance that profitable operations will ever be achieved, and if achieved, could be sustained on a continuing basis. In addition, development activities, clinical and preclinical testing, if approved, and commercialization of our product candidates will require significant additional financing. Our accumulated deficit as of March 31, 2021 was $339.1 million and we expect to incur substantial losses in future periods. We plan to finance our future operations with a combination of proceeds from the issuance of equity securities, the issuance of debt, government funding, collaborations, licensing transactions and other commercial transactions and revenues from future product sales, if any. We have not generated positive cash flows from operations,

and there are no assurances that we will be successful in obtaining an adequate level of financing for the development and, if approved, commercialization of our product candidates.

On May 11, 2021 (the Closing Date), we entered into a Credit Agreement and Guaranty (as amended by that certain letter agreement on May 17, 2021, the Credit Agreement) with Oaktree Fund Administration, LLC, as administrative agent and the lenders party thereto that provides for a five-year senior secured term loan facility in an aggregate original principal amount of up to $125.0 million available to us in five tranches as follows (collectively, the Term Loans):

The Term Loans will bear interest at a fixed per annum rate (subject to increase during an event of default) of 11.50% and are scheduled to mature on the fifth anniversary of the Closing Date (the Maturity Date). In addition, at the time of funding of any tranche of the Term Loans, we are required to pay an upfront fee of 2.0% of the aggregate principal amount being funded. We are required to make quarterly interest payments until the Maturity Date. We are also required to make principal payments, which are payable in quarterly installments beginning on the last day of the first quarter ending after the third anniversary of the Closing Date in an amount equal to 5.0% of the aggregate amount of the Term Loans outstanding on the date of the first such quarterly principal payment and continuing until the Maturity Date, on which date all outstanding Term Loans and other amounts owed under the Credit Agreement will be required to be paid in full. A commitment fee of 75 basis points per annum will accrue on each of the tranche B, C and D commitments for the period beginning 120 days after the funding date of the tranche A-2 term loans until the applicable tranche is either funded or terminated.

In September 2020, we entered into a contract (BARDA Contract) with the Biomedical Advanced Research and Development Authority (BARDA), a division of the U.S. Department of Health and Human Services’ Office of the Assistant Secretary for Preparedness and Response. Under the BARDA Contract, we received an award of up to an estimated $51 million for development of IV-administered ganaxolone for the treatment of refractory status epilepticus (RSE). The BARDA Contract provides for funding to include support, on a cost-sharing basis, the completion of a Phase 3 clinical trial of IV-administered ganaxolone in patients with RSE (our Phase 3 clinical trial evaluating IV ganaxolone for the treatment of RSE (RAISE Trial)) , funding of pre-clinical studies to provide support that IV-administered

ganaxolone could be an effective treatment for RSE due to chemical nerve gas agent exposure, and funding of certain manufacturing scale-up and regulatory activities.

The BARDA Contract consists of an approximately two-year base period-during which BARDA will provide approximately $21 million of funding for the RAISE Trial on a cost share basis and funding of additional preclinical studies of ganaxolone in nerve agent exposure models. Following successful completion of the RAISE Trial and preclinical studies in the base period, the BARDA Contract provides for approximately $30 million of additional BARDA funding for three options in support of manufacturing, supply chain, clinical, regulatory and toxicology activities. Under the BARDA Contract, we will be responsible for cost sharing in the amount of approximately $33 million and BARDA will be responsible for approximately $51 million, if all development options are completed. The contract period-of-performance (base period plus option exercises) is up to approximately five years.

In connection with the closing of an equity financing in December 2020, we issued a total of 5,000,000 shares of common stock in an underwritten public offering resulting in aggregate net proceeds, after underwriting discounts and commissions in the public offering and other estimated offering expenses, of $64.9 million.

In connection with the closing of an equity financing in June 2020, we issued a total of 4,600,000 shares of common stock in an underwritten public offering resulting in aggregate net proceeds, after underwriting discounts and commissions in the public offering and other estimated offering expenses, of $42.9 million.

We believe that our cash and cash equivalents balances as of March 31, 2021, including the net upfront proceeds received in May 2021 from our Credit Agreement, will enable us to fund our operating expenses and capital expenditure requirements for at least the next 12 months.

Reverse stock split

On September 23, 2020, we effected a 1-for-4 reverse split of shares of our common stock (Reverse Split), as approved by our board of directors and stockholders. The par value per share of our common stock was not adjusted as a result of the Reverse Split, and our authorized shares of common stock was reduced to 150,000,000. All of the share and per share amounts included in the accompanying financial statements and these notes have been adjusted to reflect the Reverse Split.