T-Mobile (TMUS) and Real Goods Solar (RSOL) were among the biggest stock losers in early trading Monday morning. However, their losses pale in comparison with Usec (USU).

Several other big companies suffered a dip in value Monday morning while the broader market grew stronger.

Take a closer look at a few of Monday’s biggest stock losers.

Biggest Stock Losers

Usec (USU, -50%): USU stock is down an astonishing 50% and the company has reached an agreement with most of its holders to replace about $530 million in convertible notes as part of a financial restructuring plan. Usec is expected to file for bankruptcy in the first quarter of 2014.

Real Goods Solar (RSOL, -8%): Following RSOL stock’s continuing decline, the company called for a meeting on Jan. 14, 2014 with its shareholders to discuss the possibility of a merger with Mercury (MRCY).

CytRx (CYTR, -7%): CYTR stock is down 7% following a 125% boom over the last four days thanks to the company’s announcement of clinical trial results.

Coronado Biosciences (CNDO, -6%): CNDO stock had a disappointing morning following a month where its value rose 60%.

T-Mobile (TMUS, -3%): As tech giant Sprint looks to merge with T-Mobile, TMUS stock suffered a 3% dip today.

Plug Power (PLUG, -5%): PLUG stock is down 4.78% following a 12-day period of growth where its value went up an impressive 150%.

Zogenix (ZGNX, -3%): Zogenix received FDA approval for a migraine drug on Dec. 10 but the company’s stock is down 2.65% Monday morning.