Marinus Pharmaceuticals Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)

Marinus Pharmaceuticals, Inc. (Nasdaq: MRNS) (the "Company” or "Marinus”), a pharmaceutical company dedicated to the development of innovative therapeutics to treat rare seizure disorders, today announced the grant of inducement awards to 11 new employees. The Compensation Committee of the Board of Directors of Marinus approved the grant of non-qualified stock options to purchase an aggregate of 144,050 shares of its common stock as inducements material to the employees entering into employment with the Company in accordance with Nasdaq Listing Rule 5635(c)(4).

Of these stock option grants, 138,250 have an exercise price of $14.53 per share, which is equal to the closing price of Marinus’ common stock on October 9, 2020, the date of grant for the stock options. The remaining 5,800 stock options have an exercise price of $14.86 per share, which is equal to the closing price of Marinus’ common stock on October 12, 2020 corresponding with the applicable employees’ start date. All of the stock options will vest and become exercisable as to 25% of the underlying shares on the one-year anniversary of the employee’s start date of employment, and will vest and become exercisable as to the remaining 75% of the underlying shares in 36 equal monthly installments at the end of each month following such anniversary, subject to the employee’s continued employment with Marinus on such vesting dates. The stock options were granted as an inducement material to the employee entering into employment with Marinus in accordance with Nasdaq Listing Rule 5635(c)(4), and are subject to the terms and conditions of the applicable award agreement covering such grant.

About Marinus Pharmaceuticals

Marinus Pharmaceuticals, Inc. is a pharmaceutical company dedicated to the development of innovative therapeutics to treat rare seizure disorders. Ganaxolone is a positive allosteric modulator of GABA_A receptors that acts on a well-characterized target in the brain known to have anti-seizure, anti-depressant, and anti-anxiety effects. Ganaxolone is being developed in IV and oral dose forms intended to maximize therapeutic reach to adult and pediatric patient populations in both acute and chronic care settings. Marinus is conducting the first ever Phase 3 pivotal trial in children with CDKL5 deficiency disorder, along with a Phase 2 trial in Tuberous Sclerosis Complex, and a Phase 2 biomarker driven proof of concept trial in PCDH19-related epilepsy. The Company intends to initiate a Phase 3 trial in status epilepticus. For more information visit www.marinuspharma.com.

Forward-Looking Statements

To the extent that statements contained in this press release are not descriptions of historical facts regarding Marinus, they are forward-looking statements reflecting the current beliefs and expectations of management made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Words such as "may”, "will”, "expect”, "anticipate”, "estimate”, "intend”, "believe”, and similar expressions (as well as other words or expressions referencing future events, conditions or circumstances) are intended to identify forward-looking statements. Examples of forward-looking statements contained in this press release include, among others, statements regarding our clinical development plans for ganaxolone and the clinical development schedule and milestones. Forward-looking statements in this release involve substantial risks and uncertainties that could cause our clinical development programs, future results, performance or achievements to differ significantly from those expressed or implied by the forward-looking statements. Such risks and uncertainties include, among others, uncertainties and delays relating to the design, enrollment, completion, and results of clinical trials; unanticipated costs and expenses; clinical trial results may not support further development in a specified indication or at all; actions or advice of the U.S. Food and Drug Administration may affect the design, initiation, timing, continuation and/or progress of clinical trials or result in the need for additional clinical trials; our ability to obtain and maintain regulatory approval for our product candidate; delays, interruptions or failures in the manufacture and supply of our product candidate; our ability to raise additional capital; the effect of the COVID-19 pandemic on our business, the medical community and the global economy; and the availability or potential availability of alternative products or treatments for conditions targeted by us that could affect the availability or commercial potential of our product candidate. Marinus undertakes no obligation to update or revise any forward-looking statements. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of the Company in general, see filings Marinus has made with the Securities and Exchange Commission.

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