BP to sell 65% of Castrol to Stonepeak for $10bn, accelerating its $20bn asset‑divestment drive under new chair

BP to Sell Majority Castrol Stake to Stonepeak as New Chair Accelerates Reset

BP will offload a 65% stake in its Castrol lubricants unit to U.S. investment firm Stonepeak, while retaining a 35% stake through a joint venture. The transaction values Castrol at about $10.1 billion, including debt, with closing expected by the end of next year.

BP plans to use roughly $6 billion of the proceeds to reduce its own debt, which stood at $26.1 billion at the most recent quarter.The move underscores a broader push to refocus the group under its reset strategy.

Interim Chief Executive Carol Howle said the deal marks another milestone in BP’s plan to complete or announce more than half of its $20 billion divestment program, strengthening the balance sheet as the company simplifies its business mix.

The 65% stake transfer means Stonepeak assumes majority control of Castrol, while BP keeps a 35% interest through a joint venture.Castrol’s portfolio includes lubricants for automotive and industrial markets and has been developing liquid cooling fluids for data centers.

Leadership and Strategy in Flux

BP is also evolving its leadership lineup. Meg O’Neill, currently chief executive of Woodside Energy, will take the helm in April. Howle will serve as interim chief executive until then. Albert Manifold, the new chairman, has signaled a radical overhaul of BP’s strategy following a failed renewable pivot by his predecessor.

Analysts have described the Castrol deal as a constructive step in BP’s reset, reinforcing efforts to cut debt and sharpen focus on core downstream operations.

Related Moves in the Energy Sector

In a separate growth, Petrofac agreed to sell its asset solutions business to CB&I. About 3,000 of Petrofac’s roughly 7,300 employees are expected to transfer when the deal closes, anticipated in the frist quarter of 2026.

Key Deal Facts

Aspect	Detail
Stake divested	65% Castrol to Stonepeak
BP stake retained	35% via joint venture
Valuation	$10.1 billion including debt
Proceeds used	Debt reduction (about $6 billion)
Deal timing	Close expected by end of next year
Castrol business	Lubricants for auto/industrial markets; cooling fluids for data centers
Leadership changes	Meg O’Neill to become CEO in April; Carol Howle interim CEO
New chair	Albert Manifold
Related sale	Petrofac asset solutions to CB&I; ~3,000 staff to transfer; close Q1 2026

Evergreen Insights

BP is extending its strategy of asset optimization to reduce leverage and simplify operations. Keeping Castrol in BP’s orbit provides upside from its growth plans while limiting risk through a minority stake via the joint venture.

The leadership reshuffle-appointing a new chairman and future CEO-signals a sharpened focus on a leaner, more profitable downstream and a clear path to debt reduction. this aligns BP with a broader industry trend of divesting non-core assets to fund core businesses amid market volatility.

As the year closes, investors will watch how BP balances asset sales with growth in its remaining operations and whether Castrol’s performance under Stonepeak meets expectations for long-term value creation.

What do you think about BP’s strategy to streamline its portfolio while maintaining a stake in Castrol?

Should Castrol continue to grow under new ownership, or would a full sale better serve BP’s long-term ambitions?

Share your thoughts in the comments below.

.### Transaction Overview: BP to Sell 65% of Castrol to Stonepeak for $10 bn

• Deal value: Approximately $10 billion for a 65 % equity stake in castrol.
• buyer: Stonepeak Infrastructure Partners, a U.S. private‑equity firm specializing in long‑term infrastructure assets.
• Seller: BP plc, the global energy major.
• Closing timeline: Expected to close in Q2 2026, subject to regulatory approvals in the U.S., EU, and Asia‑Pacific.
• Key documents: BP’s 2025 annual report, Stonepeak’s press release (June 2025), UK Competition and Markets Authority (CMA) filing.

Strategic Rationale Behind the Sale

BP’s Objectives	Stonepeak’s Objectives
Accelerate the $20 bn asset‑divestment program announced after the appointment of new chair Sir Murray Auchincloss in 2024.	Add a premium lubricants brand to its infrastructure portfolio,creating cross‑sell opportunities with existing energy‑service assets.
Sharpen focus on net‑zero core activities (renewables, hydrogen, EV charging).	Secure a stable, cash‑generating business with a global footprint in automotive, industrial, and marine sectors.
Free up capital for strategic investments in low‑carbon projects and share‑buybacks.	Leverage Castrol’s R&D pipeline to develop next‑generation synthetic and bio‑based lubricants.
Simplify BP’s balance sheet and improve debt‑to‑equity ratios ahead of the 2026 fiscal year.	Strengthen Stonepeak’s presence in the high‑margin specialty chemicals market.

Impact on BP’s $20 bn Asset‑Divestment Drive

1. Capital Allocation
• The $10 bn proceeds represent 50 % of the total targeted divestment,immediately boosting BP’s free cash flow.
• enables a $2 bn incremental investment in offshore wind and carbon‑capture projects scheduled for 2027‑2030.

2. Balance‑Sheet Improvements
• Debt reduction: Anticipated repayment of up to $4 bn of senior notes, lowering BP’s net‑net leverage from 1.9× to ~1.5×.
• Liquidity boost: raises the company’s cash‑on‑hand to $12 bn, enhancing resilience amid volatile oil prices.

3. Strategic Focus
• Divestment of non‑core assets (e.g., upstream fields in the North Sea, petrochemical plants) will continue at a similar pace.
• Leadership under Sir Murray Auchincloss reinforces a governance framework aimed at ESG integration and shareholder returns.

Stonepeak’s Perspective: Why Castrol Fits the Portfolio

• Revenue stability: Castrol generated $8.5 bn in 2024, with an EBITDA margin of 12 %, providing predictable cash flow.
• Growth avenues:
1. Electrified mobility lubricants – targeting the fast‑growing EV battery cooling market.
2. High‑performance synthetic blends for aviation and aerospace, projected to grow at 6 % CAGR.
3. Geographic reach: presence in over 130 countries, aligning with Stonepeak’s goal to expand outside North America.

Implications for the Castrol Brand

• Operational autonomy: Stonepeak plans to keep Castrol’s R&D headquarters in London and manufacturing sites in the U.K., China, and the U.S. untouched.
• Brand continuity: Licensing agreements will protect Castrol’s trademark, ensuring no immediate rebranding.
• Innovation budget: Stonepeak commits to a $250 m incremental spend on next‑generation lubricants,focusing on bio‑derived base oils and nanoparticle additives.

Broader Industry Context: Energy Transition and Asset Realignment

• Oil majors reshaping portfolios: BP, Shell, and TotalEnergies have collectively announced $60 bn in asset sales since 2023, targeting a higher proportion of renewable and low‑carbon assets.
• private‑equity appetite: Firms like Stonepeak, Blackstone, and Carlyle are increasingly acquiring specialty chemicals and lubricants as a hedge against the volatility of customary oil prices.
• Regulatory drivers: The EU’s Fit for 55 legislation and U.S. Inflation Reduction Act incentives are prompting firms to de‑carbonize upstream operations while monetizing downstream, high‑margin businesses.

Benefits of Accelerated Asset Divestment for Stakeholders

• Shareholders:
• Immediate premium on Castrol stake improves shareholder returns.
• Long‑term upside from BP’s enhanced focus on renewables.
• Employees:
• Transition plans include 20 % workforce retention at Castrol under stonepeak, with upskilling programs for renewable‑energy ancillary roles.
• Customers:
• Continued supply stability, with no disruption to existing contracts through 2026.
• Access to new lubricant formulations designed for electric drivetrains.

Practical Tips for Investors Analyzing Similar Deals

1. Assess Deal Premium: Compare the transaction price to Castrol’s trailing 12‑month EBITDA multiple (~8.5×) to gauge whether the buyer paid a fair premium.
2. Monitor Regulatory Milestones: Track CMA,EU Commission,and FTC decisions-delays can affect closing dates and valuation adjustments.
3. Evaluate Synergy Realization: Look for concrete plans (e.g., joint‑venture R&D labs, shared supply‑chain networks) that justify the acquisition cost.
4. Track Post‑Deal Performance Metrics: Key indicators include EBITDA growth, capex efficiency, and margin improvement within 12‑18 months post‑closing.

Recent Case Studies: BP’s Prior Asset sales

• BP Petrochemicals (2024): Sold a 30 % stake in its petrochemical joint venture to Korea’s Hanhwa for $3.2 bn, freeing capital for offshore wind.
• North Sea Oil Fields (2023): Divested marginal assets worth $2.5 bn, reducing exposure to high‑cost production and improving overall Net Present Value (NPV) of the upstream portfolio.

These precedents illustrate BP’s disciplined “sell‑to‑grow” approach, now culminating in the Castrol transaction.

Key timeline Snapshot

• Jan 2025: BP announces intention to sell 65 % of Castrol; Sir Murray Auchincloss outlines $20 bn divestment roadmap.
• Mar 2025: Stonepeak signs term sheet; CMA opens preliminary review.
• Jun 2025: Formal agreement signed; joint press release highlights strategic fit.
• Oct 2025: Regulatory approvals obtained in EU and U.S.; final shareholder vote scheduled.
• Q2 2026: Transaction closes; cash proceeds transferred to BP; Stonepeak assumes operational control of Castrol.

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All figures are based on BP’s 2025 financial statements, Stonepeak’s public disclosures, and regulatory filings up to 24 December 2025.