Premarket Movers | Rubrik Surges 18%; Cooper Jumps 13%; Baidu Gains 5%; Oklo and Docusign Fall 6%; SoFi Drops 7%

Rubrik shares jumped 17.8% after the cybersecurity and data management firm posted quarterly earnings well above expectations and raised full-year guidance. The company cited strong growth in its subscription base and improving profitability metrics, as investor sentiment turned bullish on its AI-driven security platform.

Cooper Companies said it is initiating a formal strategic review aimed at identifying opportunities to enhance long-term shareholder value, sending shares up 12.9%.

Ulta Beauty raised its annual sales and profit forecast, betting on strong demand for its makeup and skincare products going into the holiday season. Shares of the company, which also reported third-quarter results above estimates, were up 5.6%.

Kunlunxin, the AI chip unit of Chinese internet search giant Baidu, is planning an initial public offering in Hong Kong, having recently completed a fundraising that valued it at 21 billion yuan ($2.97 billion), three people familiar with the matter told Reuters. US-listed shares of Baidu jumped 4.7%.

Netflix is in exclusive talks to buy Warner Bros Discovery's film and television studios along with its streaming assets, in a deal valued at $28 per share that could reshape the media landscape, a source told Reuters. Warner Bros Discovery shares gained 3.8%.

Oklo shares fell 5.5% after disclosing it entered into an equity distribution agreement under which the company may offer and sell Class A common shares with aggregate gross sales proceeds of up to $1.5 billion through an at-the-market equity offering program.

Docusign’s AI-powered IAM platform helped the electronic-signature platform provider’s third-quarter results beat estimates, though its shares slipped 5.8% as its outlook for the current quarter didn’t exceed analysts’ expectations.

SoFi Technologies shares fell 7.1% after the fintech company announced a $1.5 billion stock offering.

Cybersecurity firm SentinelOne forecast fourth-quarter revenue below analysts' expectations, and said Chief Financial Officer Barbara Larson will step down. The shares of the company fell 8%.

Hewlett Packard Enterprise forecast first-quarter revenue below Wall Street estimates, as it sees a fall in AI server income due to customers shifting their orders to the second half of the year. The shares dropped 8.5%.