SLB is the world's largest oilfield services company. It makes money by selling tools, software, and services to oil and gas companies that need help drilling wells, measuring underground rock, and getting oil and gas out of the ground. Its four main business lines are Digital (software and data platforms), Reservoir Performance (understanding what is underground), Well Construction (drilling and building wells), and Production Systems (equipment that lifts oil and gas to the surface). Every time an oil company drills a well or needs to produce more from an existing one, SLB gets paid for the work. The diagram below traces where the money goes.
Between 2021 and 2024, SLB grew steadily. Revenue climbed from $22.9 billion in 2021 to $36.3 billion in 2024. That is four straight years of growth, and it tracks almost perfectly with higher oil prices and more drilling activity around the world. Gross margin also improved every year over that stretch, rising from about 16% in 2021 to about 21% in 2024. The business was clearly getting more profitable as it got bigger.
Then 2025 arrived with a harder environment. Oil prices fell. Some big customers in Saudi Arabia, Mexico, and offshore West Africa spent less money on drilling. Full-year revenue dropped to $35.7 billion, down from $36.3 billion the year before. Gross margin also slipped, falling back to about 18%. Without the $1.5 billion contribution from a newly acquired company called ChampionX, the underlying revenue decline would have been 6%. That gap matters. It means the core business shrank while acquisitions masked some of the damage.
One thing that held up well was cash generation. Operating cash flow came in at $6.5 billion in 2025, very close to the $6.6 billion in both 2023 and 2024. Free cash flow was $4.8 billion in 2025, up slightly from $4.7 billion the year before. SLB returned $4.0 billion to shareholders in 2025 through dividends and share repurchases. This shows that even when revenue dips, the business produces a lot of real cash.
SLB carries meaningful debt on its books. Net debt stood at $13.5 billion at the end of 2025 according to the financial data, though the company's own liquidity table shows a narrower net debt figure of $7.4 billion after accounting for cash and short-term investments. Either way, SLB has billions in fixed-rate bonds maturing steadily through 2033 and beyond, meaning interest payments are a recurring obligation regardless of where oil prices go.
The new horizons SLB is chasing are real but still small. The Data Center Solutions business, which makes modular data center equipment for hyperscalers, grew 121% in 2025 year over year. Carbon capture is live through the SLB Capturi joint venture. Geothermal and hydrogen projects are underway. But today, these businesses are a fraction of total revenue. Well Construction alone generated $11.9 billion in 2025, more than four times the entire Digital division's $2.7 billion.
Now consider the specific risks. The most fundamental one is simple: SLB's customers are oil and gas companies. When oil prices fall, those companies drill fewer wells and order fewer services. That cycle has happened repeatedly and the 2025 results show it happening again in key markets. SLB has almost no control over oil prices.
Russia is a specific financial exposure. The company has $0.7 billion of assets there. It stopped doing new business in Russia in 2022 and stopped shipping products in 2023. Russia still represented 4% of revenue in 2025, which means some activity continues, but further escalation in that conflict or tighter sanctions could force SLB to write off assets it cannot retrieve. Separately, 82% of SLB's revenue comes from outside the United States, spreading that geopolitical risk across many unstable regions.
The digital business creates a different kind of risk. SLB's software platforms let oil company customers control operations remotely and store sensitive underground data in the cloud. A serious cyberattack could let hackers break those systems or even interfere with live oil and gas production. SLB's reputation is directly tied to the security of its customers' operations. A major breach could push customers toward competitors.
Climate regulation is a slow-moving but structural risk. New laws that reduce demand for oil and gas directly reduce demand for everything SLB sells to its core customers. SLB has committed to a net-zero target by 2050, which is notable. But its Scope 3 emissions, the ones caused by customers using SLB technology, make up roughly 95% of its total emissions baseline. That means SLB's emissions profile is almost entirely determined by how much oil and gas its customers produce.
SLB is trying to change this by growing its Digital division, which earns some revenue through software subscriptions and recurring platform fees. But most of the business is still per-transaction: a customer drills a well, SLB gets paid, the well is done. That structure means when drilling activity falls, revenue falls with it, as 2025 demonstrated clearly.