Traders and financial professionals work at the opening bell on the floor of the New York Stock Exchange (NYSE), June 3, 2019 in New York City.

Check out the companies making headlines after the bell:

Shares of Box dropped nearly 11% in extended trading after the cloud company lowered guidance for the current fiscal year. Box now expected full-year revenue between $688 million and $692 million, down from a previously stated range of $700 million to $704 million. The company reported a first-quarter loss of 3 cents per share and revenue of $163 million, topping Wall Street estimates of a loss of 5 cents per share and revenue of $161.4 million.

Coupa Software stock jumped more than 4% after the company posted a surprise profit and reported first-quarter results that beat analysts expectations on the top and bottom lines. Coupa reported earnings of 3 cents per share on revenue of $81.3 million, while analysts had expected a loss of 4 cents per share on revenue of $73.9 million.

Shares of Continental Resources jumped nearly 3.5% after the petroleum and natural gas company announced a $1 billion share-repurchase program.

Shares of real estate investment trust Ventas fell 2% after announcing a secondary offering of 11 million shares. The company intends to use the proceeds to help fund an acquisition. Morgan Stanley, Citigroup and J.P. Morgan are joint book-running managers for the offering.