Marinus Pharmaceuticals Announces Closing of $70 Million Public Offering of Common Stock and Concurrent Private Placement Including Full Exercise of Underwriters Option to Purchase Additional Shares

13 December 2019

RADNOR, Pa., Dec. 13, 2019 (GLOBE NEWSWIRE) -- Marinus Pharmaceuticals, Inc. (NASDAQ: MRNS), (“Marinus” or the “Company”) today announced the closing of an underwritten public offering of 32,200,000 shares of common stock at a public offering price of $1.25 per share, including the exercise in full by the underwriters of their option to purchase up to 4,200,000 additional shares of common stock. The offering included participation from new and existing investors, and together with the concurrent private placement raised gross proceeds of approximately $70 million, before deducting underwriting discounts and commissions, placement agent fees and estimated offering expenses payable by the Company.

Oppenheimer & Co. Inc. and Ladenburg Thalmann & Co. Inc., a subsidiary of Ladenburg Thalmann Financial Services Inc., (NYSE American: LTS), acted as joint bookrunning managers for the offering. Craig-Hallum Capital Group LLC acted as co-manager for the offering.

Concurrently with the completion of the public offering, the Company sold to certain investors in a private placement, a number of shares of convertible preferred stock equal to an aggregate purchase price of up to $30 million, at a conversion price of $1.25 per share. Marinus intends to use the net proceeds of this offering to advance the clinical development of ganaxolone, including trials for its rare seizure disorder programs and for working capital and general corporate purposes.

The public offering was made pursuant to an effective shelf registration statement on Form S-3 (No. 333-221243) previously filed with the U.S. Securities and Exchange Commission (the “SEC”) and declared effective by the SEC on December 1, 2017. A final prospectus supplement and accompanying prospectus relating to the public offering were filed with the SEC and are available on the SEC’s website located at Electronic copies of the final prospectus supplement and the accompanying prospectus may be obtained by contacting Oppenheimer & Co. Inc., Attention: Syndicate Prospectus Department, 85 Broad Street, 26th Floor, New York, NY, 10004, by telephone at (212) 667-8055, or by email at; or from Ladenburg Thalmann & Co. Inc., Prospectus Department, 277 Park Avenue, 26th Floor, New York, New York 10172 or by email at

The shares of convertible preferred stock sold in the concurrent private placement have not been registered under the Securities Act or under any state securities laws and, unless so registered, may not be offered or sold in the United States except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act and applicable state securities laws. Marinus has agreed to file a resale registration statement with the SEC for purposes of registering the resale of the shares of common stock issuable upon conversion of the preferred shares issued in the concurrent private placement.

This press release does not constitute an offer to sell or the solicitation of offers to buy any securities of Marinus being offered, and shall not constitute an offer, solicitation or sale of any security in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Marinus Pharmaceuticals

Marinus Pharmaceuticals, Inc. is a pharmaceutical company dedicated to the development of ganaxolone, which offers a new mechanism of action, demonstrated efficacy and safety, and convenient dosing to improve the lives of patients suffering from epilepsy and depression. Ganaxolone is a positive allosteric modulator of GABAA 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 pivotal studies in children with CDKL5 deficiency disorder and PCDH19-related epilepsy and has recently released top-line data from Phase 2 studies in women with postpartum depression and patients with refractory status epilepticus.

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 intended use of proceeds from the public offering and concurrent private placement. Forward-looking statements in this release involve substantial risks and uncertainties. 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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