FRANKFURT—German sportswear and equipment maker Puma SE announced plans on Thursday to buy a stake of up to 5% in Borussia Dortmund GmbH, a leading German soccer club, as part of a capital raising the club unveiled earlier in the day.

Borussia Dortmund, Germany's only listed soccer club, plans to raise €114.4 million ($153 million). The club, which has a market capitalization of €339.1 million, plans to issue up to 24.6 million new shares at €4.66 a share.

...