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Ademi & O’Reilly, LLP announces an investigation of Marriott International, Inc. (MAR) for possible violations of securities laws.

The investigation focuses on whether Marriott violated securities laws by not disclosing that its IT systems and security were insufficient and had been compromised.  The database breach affects some 500 million hotel guests, and for about 327 million of them, the data included passport numbers, emails and mailing addresses. Credit card details may also have been stolen.