Here are the stocks making headlines in after hours trading on Thursday. Lululemon — The apparel stock slumped 20% after earnings guidance came in below expectations. Lululemon projected second-quarter earnings per share of $2.85 to $2.90 per share. Analysts surveyed by LSEG were looking for $3.29 per share. Lululemon also cut its full-year earnings guidance. Docusign — The software stock slid 16% after reporting slower-than-expected billings growth. First-quarter billings of $739.6 million were short of the $746.2 million projected by analysts, according to FactSet. Tesla — The electric vehicle maker fell about 2% in extended trading as Elon Musk and President Donald Trump continued to trade barbs on social media. The loss extended the 14% slide from Thursday’s formal trading session. Samsara — Shares of the software company tumbled 11% after the company projected revenue growth to slow. Samsara’s guidance called for revenue to increase to a range of $371 million to $373 million in its second quarter, up from the $367 million in the first quarter. That would be a slowdown on both a sequential and year over year basis. Broadcom — The chip stock dipped more than 3% after free cash flow was weaker than expected in the firm’s fiscal second quarter. Broadcom reported $6.41 billion in free cash flow, below the $6.98 billion projected by analysts, according to FactSet. Scond quarter adjusted earnings per share and revenue came in slightly ahead of expectations, according to LSEG. Shares of Broadcom were up nearly 30% in the month leading up to this report. Rubrik – Shares of the cloud data management company were down nearly 2% after guidance for the current quarter’s loss was roughly in line with Wall Street’s expectations. Rubrik sees a second-quarter loss of 35 cents to 33 cents per share, while analysts polled by FactSet called for a 35-cent loss per share. First-quarter results surpassed estimates. Quanex Building Products — The maker of windows and doors and other construction materials rallied more than 8% after earning an adjusted 60 cents per share in its fiscal second quarter versus analysts’ consensus estimate of 47 cents, on revenue of $452 million against the Street’s $439 million, FactSet data showed. Braze – The provider of customer engagement platforms saw shares slide 8%. Braze said its second-quarter guidance for adjusted earnings ranges between 2 cents and 3 cents per share, while analysts polled by FactSet called for 9 cents per share. In the first quarter, Braze posted adjusted earnings of 7 cents per share on revenue of $162.1 million, topping the Street’s estimates. — CNBC’s Darla Mercado and Scott Schnipper contributed.