May 20, 2013

Robbins Umeda LLP Announces an Investigation of Carbo Ceramics, Inc.

Shareholder rights firm Robbins Umeda LLP is investigating possible breaches of fiduciary duty and other violations of the law by certain officers and directors at Carbo Ceramics, Inc.

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Robbins Umeda LLP Announces an Investigation of Carbo Ceramics, Inc.