A customer enters a Dollar General Corp. store in Colona, Illinois, U.S., on Wednesday, Sept. 10, 2014.

Daniel Acker | Bloomberg | Getty Images

Check out the companies making headlines in midday trading.

Dollar General — Shares of the discount retail chain gained 4.5% despite a weaker-than-expected fourth-quarter report. Dollar General reported $8.65 billion in sales for the quarter, below the $8.7 billion expected by analysts, according to Refinitiv. The company’s $2.57 in earnings per share matched expectations. The company did announce a 31% dividend increase, and some analysts cited Dollar General’s outlook as a positive.

Signet Jewelers — Shares of the jewelry company popped 7% after reporting same-store sales above consensus estimates. Per-share earnings were in line with expectations and quarterly revenue topped Wall Street’s estimates, according to Refinitiv.

PagerDuty — Shares rallied 20.9% after PagerDuty posted a better-than-expected quarterly report. The company lost an adjusted 4 cents per share for its latest quarter, beating the Refinitiv consensus estimate by 2 cents. The digital operations platform provider’s revenue also defied Street forecasts, and PagerDuty issued an upbeat revenue forecast.

Occidental Petroleum — The energy stock rose 9.5% after Warren Buffett’s Berkshire Hathaway purchased an additional 18.1 million shares of Occidental. A filing with the Securities and Exchange Commission on Wednesday shows it paid a weighted average of $54.41 per share, a total of $985 million for the new shares.

Guess — The apparel maker’s shares rallied 9.3% after the company’s quarterly report. Guess posted adjusted quarterly earnings of $1.14 per share, one cent below the Refinitiv consensus, while revenue also fell short of forecasts. However, profit margins were better than anticipated.

Revolve — Shares of the online designer clothing retailer rose 6.5% after Needham initiated coverage of the company with a buy rating. As consumers return to in-person events, Revolve is an “ultimate reopening play” that will continue to leverage data to capture market share, analysts wrote.

Ralph Lauren — The retail stock rose 4.6% after JPMorgan upgraded Ralph Lauren to an overweight rating from neutral. The firm said Ralph Lauren could benefit from an “elevated casual” apparel trend as customers return to the office.

McDonald’s — McDonald’s shares were marginally lower as Morgan Stanley lowered its price target on the fast-food giant to $287 per share from $294 amid store closures in Russia and Ukraine. The company has said the closures could cost it $50 million a month.

SolarEdge Technologies — Shares fell 5.9% after the company announced a proposed public offering of 2 million shares of its common stock.

— CNBC’s Jesse Pound, Tanaya Macheel and Samantha Subin contributed reporting.

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