** Shares of Quest Diagnostics DGX.N rise 7% to $224 premarket

** Co raises its annual adj. profit forecast to between $11.05 and $11.25 per share, compared to its previous expectation of $10.63 to $10.83

** DGX reports Q2 adj. profit of $3.12 per share vs analysts' average estimate of $2.84 - LSEG data

** Co's Q2 revenue of $3.04 billion beats analysts' average expectation of $2.97 billion

** "Revenues increased by over 10%, almost all from organic revenue growth across our physician, hospital and consumer channels" says CEO Jim Davis

** Up to last close, stock up 20.9% YTD