By Josh Beckerman

Amkor Technology Inc., which provides semiconductor packaging and test services, will replace workplace furnishings and building products company HNI Corp. in the S&P MidCap 400 on Feb. 16.

HNI will join the S&P SmallCap 600. S&P Dow Jones Indices said HNI is more representative of the small-cap market space.

HNI is replacing Virtusa Corp., which is being sold to Baring Private Equity Asia.

Amkor shares rose 9% after hours to $20.45. HNI rose 6% to $36.15.

Write to Josh Beckerman at josh.beckerman@wsj.com

(END) Dow Jones Newswires

February 10, 2021 19:05 ET (00:05 GMT)

Copyright (c) 2021 Dow Jones & Company, Inc.
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