Check out the companies making headlines in extended trading. Micron Technology – Shares rose 13% after the semiconductor company beat expectations on revenue and provided strong guidance on the measure. Micron reported revenue of $5.82 billion for the fiscal second quarter and said it expects $6.6 billion in the current period. Both numbers exceeded analyst consensus estimates of $5.35 billion and $6.02 billion, per LSEG. Adjusted earnings per share were 42 cents for the quarter, while analysts expected a loss of 25 cents per share. Five Below – The value retailer fell 13% on weak fourth-quarter earnings and forecasts. Five Below earned $3.65 per share on revenue of $1.34 billion. Analysts surveyed by LSEG estimated earnings of $3.78 per share on $1.35 billion in revenue. The company also provided light guidance on both lines for the current quarter and the full year. Chewy – The pet-focused retailer added 1% as earnings beat consensus expectations for the fourth quarter. Chewy reported 7 cents of earnings per share and $2.83 billion in revenue, better than expectations for a loss of 5 cents per share and revenue of $2.77 billion. Despite this, the company provided simple revenue guidance for the current quarter. KB Home – Shares fluctuated in after-hours trading as traders analyzed the homebuilder's earnings release, last trading up nearly 1%. KB Home saw $1.76 per share on revenue of $1.47 billion, while analysts polled by LSEG expected $1.57 per share and $1.46 billion in revenue. Guess what? Shares of the clothing designer rose 10% in extended trading after reporting strong fourth-quarter results. Guess reported adjusted earnings of $2.01 per share on revenue of $891 million. Analysts are calling for $1.56 per share in earnings and revenue of $856 million, per LSEG. — CNBC's Darla Mercado contributed reporting.