Here’s a look at the companies making headlines in after-hours trading: Deckers Outdoor — Deckers rose 8 after reporting fiscal first-quarter earnings of $4.52 a share on revenue of $825 million, beating analysts’ expectations of $3.48 a share. % revenue was US$808 million. Dexcom — The medical device company’s stock price plunged more than 35%. Dexcom’s full-year revenue guidance was $4 billion to $4.05 billion, down from expectations earlier this year. Second-quarter revenue of $1.0 billion was below analysts’ expectations, while the consensus estimate was $1.04 billion, according to LSEG. Insulet shares fell 9.1% in response. Boston Beer Company — The maker of Twisted Tea and Samuel Adams fell 5% after second-quarter results missed Wall Street expectations. Boston Beer Co. reported earnings of $4.39 per share on revenue of $579 million, while analysts expected earnings of $5.02 per share on revenue of $597 million. Coursera — Shares of the online course provider soared 16%. Second-quarter revenue was $170 million, beating analysts’ expectations of $164 million, according to LSEG. Coursera posted a loss of 15 cents per share, while Wall Street expected a profit of 1 cent per share. Mohawk Industries — Shares of the flooring maker rose 10%. The company reported second-quarter adjusted earnings per share, excluding items, of $3 on revenue of $2.8 billion. Analysts polled by FactSet forecast earnings of $2.75 per share on revenue of $2.84 billion. The company also announced additional restructuring actions to generate annual savings of $100 million to reduce costs in a weakening market. Juniper Networks – Internet technology company fell 1%. Juniper Networks’ second-quarter adjusted earnings per share were 31 cents on revenue of $1.19 billion. That was below analysts’ expectations for LSEG’s earnings of 44 cents per share and revenue of $1.25 billion. —CNBC’s Darla Mercado contributed reporting.