ONEOK, Inc. (OKE)
ONEOK gathers, processes, and transports natural gas and natural-gas liquids across pipelines.
OKE vs SLB: how the two businesses compare
- Similar size: SLB and OKE each brought in about $35.7B of yearly revenue.
- More profitable: OKE keeps 10 cents of each sales dollar as profit, against 9 cents at SLB.
- More cash from each sale: SLB turns 18 cents of each sales dollar into operating cash flow, against 17 cents at OKE.
From each company's latest annual SEC filing. Fiscal years can end on different dates.
Schlumberger (SLB) and ONEOK (OKE) reported similar revenue: $35.7B (fiscal year ended Dec 2025) versus $33.6B (fiscal year ended Dec 2025). OKE's net margin was 10.1% and SLB's 9.4%. The SEC classifies them differently (Natural Gas Transmisison & Distribution; Oil & Gas Field Services, NEC); what connects them is shared exposure to the Economic trends research theme, not a common industry.
Figures come from each company's own SEC filings. This page compares the businesses; it is not a price target or a verdict.
- Energy
- Different
- Separate classifications
- December 31
- Same calendar
- Feb 24, 2026
OKE vs SLB: quick comparison
| Company fact | OKE | SLB |
|---|---|---|
| Company | ONEOK, Inc. | Schlumberger Limited |
| Exchange | NYSE | NYSE |
| Headquarters | — | Houston, Texas |
| Founded | — | 1926 |
| SEC industry | Natural Gas Transmisison & Distribution | Oil & Gas Field Services, NEC |
| Fiscal year-end | December 31 | December 31 |
| Latest annual filing | 10-K · 2026-02-24 | 10-K · 2026-01-23 |
OKE vs SLB: audited financials
- Scale: revenue is roughly in line ($35.7B for SLB versus $33.6B for OKE).
- Net margin: nearly identical at 10.1% (OKE) and 9.4% (SLB).
- Cash conversion: operating cash flow equalled OKE 16.6% of revenue, or 1.65× net income; SLB 18.2% of revenue, or 1.92× net income. A ratio well above 1× usually reflects non-cash charges or working-capital release; well below 1× can reflect working-capital build or non-cash gains.
- Periods: both fiscal years end on 2025-12-31, so these annual figures cover the same months.
| Metric | OKE | SLB |
|---|---|---|
| Revenue | $33.6B2025-01-01 to 2025-12-31 · SEC filing | $35.7B2025-01-01 to 2025-12-31 · SEC filing |
| Net income | $3.4B2025-01-01 to 2025-12-31 · SEC filing | $3.4B2025-01-01 to 2025-12-31 · SEC filing |
| Operating cash flow | $5.6B2025-01-01 to 2025-12-31 · SEC filing | $6.5B2025-01-01 to 2025-12-31 · SEC filing |
| Diluted EPS | $5.422025-01-01 to 2025-12-31 · SEC filing | $2.352025-01-01 to 2025-12-31 · SEC filing |
| Net margin | 10.1%2025-01-01 to 2025-12-31 · SEC filing | 9.4%2025-01-01 to 2025-12-31 · SEC filing |
OKE: FY ending 2025-12-31 · SLB: FY ending 2025-12-31. Figures as tagged in each issuer's SEC XBRL filing; fiscal calendars may not align.
Where OKE and SLB overlap, and where they don't
Overlap
- Shared research theme: Economic trends.
- Same fiscal calendar: both fiscal years end December 31.
Differences
- Different SEC industries: OKE files as Natural Gas Transmisison & Distribution; SLB as Oil & Gas Field Services, NEC.
- Only SLB maps to International markets and Wars & geopolitics.
Overlap is drawn from SEC classifications and Yield Theory research themes. It is not evidence that the companies sell to the same customers or compete product for product.
Schlumberger Limited (SLB)
SLB is the world's largest oilfield-services company, providing drilling, well-completion, and reservoir technology to producers. Its business tracks global exploration and production spending closely.
What moves each company
Company-specific drivers maintained by Yield Theory. Use them to decide which filing deserves deeper work; they are not predictions.
What moves OKE
We have not yet published a company-specific driver list for OKE. The primary source is Item 1 (Business) and Item 1A (Risk Factors) of its 10-K filed 2026-02-24.
What moves SLB
We have not yet published a company-specific driver list for SLB. The primary source is Item 1 (Business) and Item 1A (Risk Factors) of its 10-K filed 2026-01-23.
The investment question
You now know how OKE and SLB are classified, when their fiscal years end, and where their exposures overlap. Those are the facts. The investment question is what each share price already assumes about their exposure to economic trends, and which evidence in the next filings would prove that assumption wrong.
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Read the full researchSEC filing comparison and disclosure evidence
Start with primary filings because fiscal calendars and accounting presentation can make superficially similar quarters incomparable. Both fiscal years end December 31, so annual reports line up, but check segment definitions before comparing growth or margins.
The current verified House and Senate snapshot contains 11 matched transaction rows for OKE and 15 matched transaction rows for SLB. These delayed, range-based disclosures can identify a filing to inspect; they do not establish motive, conviction, or a real-time trading signal.
OKE primary filings
SLB primary filings
What this comparison cannot tell you
This page does not contain licensed live prices, a valuation model, earnings estimates, portfolio constraints, or a forecast of future returns. SEC classifications can be broad, company descriptions can lag strategic change, and the latest annual filing may predate a material acquisition or divestiture. Read subsequent quarterly and current reports before making a decision.
A stronger business is not automatically the better stock. Starting valuation, expectations, capital structure, cyclicality, dilution, and the probability of each thesis determine the investment outcome. Use this comparison to frame the work, then verify the numbers in the linked filings and current company disclosures.
More comparisons involving OKE or SLB
OKE vs SLB FAQs
Are OKE and SLB direct competitors?
Not necessarily. ONEOK files as Natural Gas Transmisison & Distribution and Schlumberger as Oil & Gas Field Services, NEC. The pair is compared because both map to the Economic trends research theme, not because the filings show head-to-head competition.
Is OKE or SLB the bigger company by revenue?
Schlumberger (SLB) and ONEOK (OKE) reported similar revenue: $35.7B (fiscal year ended Dec 2025) versus $33.6B (fiscal year ended Dec 2025). OKE's net margin was 10.1% and SLB's 9.4%. The SEC classifies them differently (Natural Gas Transmisison & Distribution; Oil & Gas Field Services, NEC); what connects them is shared exposure to the Economic trends research theme, not a common industry. Each figure is the annual amount tagged in the company's own SEC XBRL filing; market value depends on live prices, which this page does not publish.
Which is better, OKE or SLB?
There is no context-free winner. Compare the operating exposures, filing evidence, valuation, balance sheet, and risks against the specific thesis you are testing. This page deliberately does not turn a static profile into a buy or sell recommendation.
Does this OKE vs SLB comparison include live prices?
No. Yield Theory does not republish unlicensed real-time market data. The financial figures on this page are the audited annual numbers ONEOK, Inc. and Schlumberger Limited tagged in their SEC XBRL filings. Use a regulated broker or licensed quote provider for current prices and valuation multiples.
Where does the company information come from?
Company classifications, fiscal year-ends, and filing links come from the SEC EDGAR submissions API snapshot refreshed 2026-11-09. Business summaries and research themes are maintained by Yield Theory.
Data snapshot: SEC EDGAR submissions API, refreshed 2026-11-09. Independent educational research; not investment advice.
Which business differences matter to the investment thesis?
OKE vs SLB compares reported results. The reports below show how we connect operating evidence to an investment thesis, its assumptions, catalysts, and risks. $39/month or $249/year.
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