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Tribune Publishing Co., owner of the Los Angeles Times and Chicago Tribune, plunged the most ever after suspending its dividend and saying entrepreneur Michael Ferro became its non-executive chairman and largest shareholder with a $44.4 million investment.

Ferro bought 5.22 million newly issued shares, the company said Thursday. That's equal to a 16.6 percent stake, Tribune spokesman Matthew Hutchison said.

As part of the deal, he is replacing Eddy Hartenstein, a former Los Angeles Times publisher, as non-executive chairman, though Hartenstein will retain a board seat.

Tribune suspended its quarterly payout to free up cash for possible acquisitions and digital initiatives, according to the statement.

The struggling publisher, which said it ended 2015 with $41 million in cash, also reported some preliminary results for the year, saying revenue will be $1.66 billion to $1.67 billion, compared with the average of two analysts' estimates for 1.68 billion.

Tribune Publishing shares sank as much as 30 percent to $6.28, the biggest intraday drop since it was spun off from Tribune Co. in July 2014.

The company has paid a quarterly dividend of 17.5 cents a share since 2014. It will pay its previously declared fourth-quarter dividend on Feb. 11.

It has been a tumultuous time for the publisher. In September, Tribune fired Los Angeles Times Publisher Austin Beutner after little more than a year on the job, replacing him with Timothy Ryan, an executive from the Baltimore Sun.

Last summer, Eli Broad, a Los Angeles billionaire, made an overture to buy the newspaper and the San Diego Union-Tribune, according to a person with knowledge of the matter. Broad and Beutner had previously teamed up in a bid to buy the Times.

Tribune's newspaper unit was spun off from its TV business, now called Tribune Media Co. Last May, Tribune Publishing acquired the San Diego Union-Tribune and nine community weeklies and related digital properties.