Here’s what’s hot in the market today: Commonwealth REIT dipped after pricing its latest offering while ADTRAN dropped after reporting strong second quarter earnings. Kinetic Concepts, Transatlantic Holdings, and Savvis all saw significant trading on talks of acquisitions and mergers.

Commonwealth REIT (NYSE: CWH) fell almost 5% to around $24 on close to 8 million shares. The real estate investment trust announced a $24 price on 10 million shares of common on Tuesday after the market closed.

Kinetic Concepts (NYSE: KCI) jumped up almost 6% by midday, hitting a 52-week-high above $68. Nearly 30 million shares were exchanged, compared to the average 1 million shares. The medical technology company agreed to be acquired for more than $6 billion by a consortium that includes PSP Investments, Apax Partners, and CPPIB.

Savvis (NASDAQ: SVVS), the IT services company, saw its stock drop less than 1% to under $40 on 9 million shares after announcing that it would merge with competitor CenturyLink (NYSE: CTL).

Transatlantic Holdings (NYSE: TRH) climbed almost 6% to near $52 on nearly 4 million shares. Validus Holdings (NYSE: VR) made a bid to acquire control of reinsurer Transatlantic, and TRH told Bloomberg it would consider the bid “in due course.”

ADTRAN (NASDAQ: ADTN) dropped more than 8% to around $36.70 on almost 4 million shares. The corporate communications provider reported second quarter numbers, with net income up to nearly $37 million, a 33% year-on-year increase, and EPS at 56-cents, a 27% increase.

As of this writing, Anthony John Agnello did not own a position in any of the stocks named here. Follow him on Twitter at @ajohnagnello and become a fan of InvestorPlace on Facebook.