Engine maker Cummins Inc. says its filtration unit has confidentially filed to go public. The IPO is expected to commence after the completion of the review process by the Securities and Exchange Commission. Last August, Cummins reported it was exploring what it called \u201cstrategic alternatives\u201d for its filtration business unit, which it launched in 1958. The division notched annual sales of $1.2 billion in 2020. At that time, Chairman and CEO Tom Linebarger said Cummins was exploring everything from a sale to a spinoff or another kind of strategic option in an effort to realize value for Cummins\u2019 shareholders.\nLearn more about your ad choices. Visit podcastchoices.com/adchoices