Check out the companies making headlines after the bell : MillerKnoll — The furniture stock plunged 14%. MillerKnoll posted fiscal third-quarter adjusted earnings of 43 cents on revenue of $926.6 million. That reflected a year-over-year decline of 2% for adjusted earnings and an increase of 6% for revenue. The company warned of a roughly $8 million to $9 million impact in the fourth quarter tied to the Middle East conflict, stemming from minimal expected shipments to that part of the world as well as higher logistics costs. Karman — Shares slipped marginally after the aerospace and defense company posted fiscal fourth-quarter adjusted earnings of 11 cents per share, under the 12 cents analysts polled by FactSet had expected. However, Karman’s $134.5 million revenue came in above the $132.6 million consensus estimate. Celcuity — The biotechnology stock shed nearly 4%. The company reported a loss of 97 cents per share in the fourth quarter, which was narrower than the expected consensus of $1.04 a share, per FactSet. Research and development expense of $37.6 million came in line with analysts’ expectations. Worthington Steel — Shares plummeted 14% after the steel processing company posted fiscal third-quarter adjusted earnings of 27 cents per share, marking a decline from the 35 cents per share earned in the year-ago period.