Delta, Tyson fall; Co-Diagnostics, Sempra Energy rise

NEW YORK (AP) - Stocks that moved heavily or traded substantially on Monday:

Delta Air Lines Inc., down $1.55 to $22.57.

Warren Buffett sold all of Berkshire Hathaway's stakes in the four largest airlines.

Comcast Corp., down 76 cents to $36.22.

The cable and entertainment company is considering layoffs at its NBCUniversal unit, according to media reports.

Tyson Foods Inc., down $4.69 to $55.32.

The meat producer warned of a hit to its finances because of the pandemic and reported weak second-quarter profit.

Sempra Energy, up $4.19 to $124.12.

The natural gas and electricity provider handily beat Wall Street's first-quarter profit forecasts.

Co-Diagnostics Inc., up $1.53 to $15.00.

The molecular diagnostic company's COVID-19 tests received government approvals in Mexico and India.

Dave & Buster's Entertainment Inc., down $2.03 to $11.30.

The restaurant and arcade operator said investment bank Jefferies will invest $100 million to shore up its balance sheet.

Starwood Property Trust Inc., up 42 cents to $13.19.

The commercial real estate investor's first-quarter profit and revenue beat analysts' forecasts.

Microsoft Co., up $4.27 to $178.84.

The technology giant is considering buying automation software company Softomotive Ltd., according to media reports.