Here's a look at the companies making headlines after the bell: Micron Technology — The semiconductor maker's shares soared 13% after issuing strong guidance for the quarter. The company expects first-quarter adjusted earnings per share of about $1.74 on revenue of about $8.7 billion. Analysts polled by London Stock Exchange Group (LSEG) expected earnings of $1.65 per share on revenue of $8.28 billion. Fourth-quarter results also exceeded expectations. Peers Applied Materials and Lam Research were in line, rising 3% and 4% respectively. HB Fuller — Shares of the adhesive company fell nearly 10%. HB Fuller's third-quarter adjusted earnings were $1.13 per share on revenue of $918 million. Analysts polled by London Stock Exchange Group (LSEG) expected earnings of $1.23 per share on revenue of $944 million. Concentrix — Shares plunged 14%. The customer experience solutions company reported fiscal third-quarter adjusted earnings of $2.87 per share, compared with analysts' expectations of $2.93 per share, according to FactSet. However, the company's revenue of $2.39 billion topped estimates of $2.38 billion. Armada Hoffler Properties — Shares of Armada Hoffler Properties fell 5% after the real estate investment trust announced it would begin a public offering of 7 million shares of its common stock. The company intends to use the net proceeds to repay a series of loans. Worthington Steel — Shares of the metal processing company fell 4%. Net sales in the first fiscal quarter were US$834 million, down 8% from the same period last year. Adjusted earnings per share were 56 cents, compared with $1.26 per share a year ago. —CNBC’s Darla Mercado contributed reporting.