** Shares of biopharma firm Tonix Pharmaceuticals fall 15.9% to $0.599 in after-hours trading
** Company says it's planning a public offering of its common shares but didn't offer details on the size and pricing of the offering
** TNXP intends to use the net proceeds from the offering for working capital and general corporate purposes
** There can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering - Tonix
** TNXP shares on Monday closed at 71 cents
** Up to last close, stock had fallen 94% YTD
(Reporting by Harshita Mary Varghese in Bengaluru)
((HarshitaMary.Varghese@thomsonreuters.com))
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