BASF sold 80 million shares of Harbour Energy PLC at 273 pence per share.
The transaction totaled approximately £218.4 million ($291 million).
Strong investor demand prompted BASF to increase the offering from an initial 60 million shares.
The sale price reflects a 9% discount to the previous day's closing price.
This divestment reduces BASF’s stake in the UK’s largest independent oil producer to 35%.
The sale aligns with BASF’s long-term strategy to exit the oil and gas sector.
This strategy followed the merger of BASF’s Wintershall Dea unit with Harbour Energy.
BASF agreed to a 90-day lock-up period for its remaining shares.