The investment management firm headed up by Mario Gabelli continues to trim its stake in Ryman Hospitality Properties. GAMCO Investors filed papers this week with the Securities and Exchange Commission saying it now owns 11.1 percent of Ryman, down from 13.5 percent a year ago and 12 percent in the fall.

Gabelli last year opposed the conversion of Gaylord Entertainment into Ryman, which is organized as a real estate investment trust. Shares of Ryman (Ticker: RHP) are up almost 40 percent since the REIT conversion.

UPDATE: Here's the prospectus for the offering, which could reach $350 million if its greenshoe is exercised. In addition, Delek US will buy back another 1 million shares from its top investor under the umbrella of a new buyback program. The moves will lower Delek Group's stake to about 39 percent, meaning Delek US' board is having to set up some new committees. As of 12:45 p.m., Delek US shares have regained some ground and are off almost 3 percent.

As originally reported:

There's no official word yet, but an Israeli news outlet is reporting that the largest shareholder of Delek US Holdings plans to sell a big part of its stake. That knocked down the high-flying shares of Delek US (Ticker: DK) by more than 5 percent before regulators halted trading at about 10:20 a.m. Central. The news that Delek Group — which has been steadily unloading chunks of Delek US at their record highs — will market $250 million worth of its Delek US stock outweighed two analysts price target hikes. Both Blake Fernandez at Howard Weil ($38 from $32) and Paul Cheng at Barclays ($47 from $40) see the Brentwood-based company pushing higher.

The investor group that took private HCA Holdings more than six years ago on Friday wrapped up its sale of 50 million shares, a deal that took its stake in the nation's largest private hospital operator below 40 percent. Barclays Capital and Citigroup Capital Markets bought the shares at $35.87, a little more than a percentage point below where HCA (Ticker: HCA) closed Friday trading.