Tidewater's shares plunged after the company said it expects to issue equity to lenders as part of an eventual restructuring deal, which will deal a blow to current shareholders.

The offshore vessel owner's shares dropped 15.6% to reach $1.35 at the close of the day's trading.

In an earnings report, Tidewater said all scenarios in its restructuring talks will likely lead to shareholder interests that will "at a minimum, be significantly diluted".

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