Zscaler rings the opening bell at the Nasdaq exchange in New York, March 16, 2018.Source: NasdaqCheck out the companies making headlines in midday trading.Zscaler – The cloud security company’s shares dipped 11% following its quarterly earnings report, despite Zscaler posting strong results. Earnings and revenue were stronger than analysts’ expectations. The company also forecast better-than-expected earnings and revenue for its fiscal second quarter and full year.Marvell Technology – The semiconductor stock fell 4% after the company reported weaker-than-anticipated earnings and revenue for the most recent quarter. Its outlook for revenue for the fourth quarter also came in lower than analysts expected.DoorDash – Shares of the food delivery service operator fell more than 2% following a downgrade from RBC Capital Markets. The firm cited slowing order growth, calling it “too important to ignore,” and intensifying competition from Uber.Asana – Shares of the work management platform operator plunged about 11% after the company reported a loss for the most recent quarter, though it was narrower than expected. The company also issued weaker-than-expected guidance for fourth-quarter revenue.PagerDuty – Shares of the IT company rose more than 7% after it reported a slight profit for the third quarter, beating analysts’ expectations of a loss. Its revenue came in better than expected.Enphase Energy – Shares of energy name Enphase surged 6% Friday and hit a 52-week high after the company announced it launched a group of microinverters in Europe.  Horizon Therapeutics – Shares of Horizon Therapeutics jumped 3.2% after Sanofi reportedly said that if it decided …
