Direct Answer
SEC EDGAR classifies Williams Companies under SIC code 4922 (Natural Gas Transmission). Among Swoopr's S&P 500 Equal Weight companies, 5 others share that classification; by latest reported revenue, Williams Companies ranks 3 of 6. A filing classification is a starting point: a company's real competitors depend on its segments, which its 10-K describes.
How Does Williams Companies Compare With Its Peers?
| Company | Revenue (latest FY) | Revenue growth | Operating margin | Net margin |
|---|---|---|---|---|
| Targa Resources (TRGP) | $17.0 billion FY2025 | 3.9% | 19.6% | 11.3% |
| Kinder Morgan (KMI) | $16.9 billion FY2025 | 12.2% | 27.9% | 18.0% |
| Williams Companies (WMB) | $11.9 billion FY2025 | 13.8% | 35.1% | 21.9% |
| DT Midstream Inc. (DTM) | $1.2 billion FY2025 | 26.7% | 49.4% | 35.5% |
| Antero Midstream Corporation (AM) | $1.2 billion FY2025 | 7.4% | 54.2% | 35.2% |
| Summit Midstream Corporation (SMC) | $562 million FY2025 | 30.8% | n/a | 0.5% |
Revenue growth compares each company's latest fiscal year with the one before. Fiscal years do not always end on the same date, so treat close comparisons with care.
How Does Williams Companies Rank Among All SEC Filers in Its Industry Code?
6 companies with annual reports in Swoopr's SEC dataset share SIC code 4922 (Natural Gas Transmission), a wider group than the S&P 500 Equal Weight companies above. Ranks run from 1 (highest) and use each company's latest fiscal year, in U.S. dollars.
| Measure | Williams Companies | Median of filers | Rank |
|---|---|---|---|
| Revenue | $11.9 billion | $6.6 billion | 3 of 6 |
| Revenue growth | 13.8% | 13.0% | 3 of 6 |
| Operating margin | 35.1% | 35.1% | 3 of 5 |
| Net margin | 21.9% | 20.0% | 3 of 6 |
A SIC code reflects the filer's main business as the SEC records it, so the group mixes companies of very different size; the median is a better guide than the average, and a rank near the top by revenue says nothing about quality.
Where These Numbers Come From
Every figure on this page is a value Williams Companies reported in its own SEC filings, read from the SEC's XBRL data (accession 0000107263-26-000006 for fiscal year 2025). Ratios are computed from those reported values. Figures were retrieved on October 12, 2026; a later amendment or a new annual report can change them, and the filing itself always takes precedence over this summary.
Each fiscal year is labeled by the calendar year in which it ended, so a company that names the same period differently in its own filings (many retailers whose year ends in January) may use another label. A year is left out of the table when the SEC data set holds no value for it. A figure shown as "Not reported" means the company did not file a value under the standard tag Swoopr reads, not that the amount was zero. This page is educational and describes reported history only; it is not a forecast or a recommendation.
Frequently Asked Questions
Who are Williams Companies's competitors?
Companies sharing Williams Companies's SEC classification (SIC code 4922 (Natural Gas Transmission)) include Targa Resources (TRGP), Kinder Morgan (KMI), DT Midstream Inc. (DTM), Antero Midstream Corporation (AM), Summit Midstream Corporation (SMC). Its 10-K names the competitors it considers most relevant.
How does Williams Companies compare with its peers on margins?
Williams Companies's fiscal 2025 operating margin was 35.1%, against a peer median of 38.6%.
How are these peers chosen?
By the SEC Standard Industrial Classification code each company files under, within Swoopr's S&P 500 Equal Weight company set, falling back to the two-digit major group when fewer than two companies share the exact code. Classification codes are broad, so read the peer list as a screen, not a verdict.
How does Williams Companies rank among all companies in its SEC industry?
Among 6 SEC filers under SIC code 4922, Williams Companies ranks 3 by latest revenue, and 3 of 5 by operating margin (35.1% against a median of 35.1%).