BP has agreed to sell a 65% stake in its Castrol subsidiary to the global investment firm Stonepeak, forming a new joint venture. Upon completion, Stonepeak will hold a 65% stake in this venture, with BP retaining a 35% minority interest. The transaction gives the Castrol lubricants business an enterprise value of $10.1 billion.

Transaction Details and Strategic Rationale

The deal follows a comprehensive strategic review of Castrol by BP. It is expected to result in total net proceeds to BP of approximately $6 billion. This figure includes around $0.8 billion for the pre-payment of future dividend income on BP's retained stake. The implied total equity value of Castrol is $8 billion, after deducting joint venture minority interests totalling $1.8 billion—a significant proportion of which relates to the shareholding in publicly listed Castrol India—and other debt-like obligations of around $0.3 billion. BP stated the transaction represents a milestone in its strategy to simplify the portfolio, strengthen the balance sheet, and focus its downstream operations on leading integrated businesses.

Market Reaction and Strategic Context

The market reaction was described as positive, with the price tag seen as favorable against prior speculation. The deal occurs amidst BP's ongoing strategic reset, which includes a forthcoming strategic review expected in February. Analysts noted that BP, under pressure from activist investors, cannot afford a disappointment similar to a previous strategic reset that fell short of investor expectations. The transaction also comes shortly after the announcement of the chief executive's departure.

Future Plans and Divestment Programme

BP's retained 35% stake provides exposure to Castrol's growth plan, which has a track record of nine consecutive quarters of year-on-year earnings growth. Following a two-year lock-up period, BP has the option to sell its remaining stake. The transaction is expected to be completed by the end of 2026, subject to regulatory approvals. BP's leadership stated the sale allows the company to realize value for shareholders while benefiting from Castrol's growth momentum. This sale marks BP having completed or announced over half of its targeted $20 billion divestment programme, with total completed and announced proceeds now around $11.0 billion.

Use of Proceeds and Financial Position

All proceeds from this transaction will be allocated to reducing BP's net debt, targeting a range of $14 billion to $18 billion by the end of 2027. As of the end of the third quarter 2025, BP's net debt stood at $26.1 billion. The company's divestment proceeds guidance for 2025 is over $4 billion, of which $1.7 billion had been received by the third quarter, with the remainder expected by year-end 2025.