How the rankings were determined

The Houston Chronicle 100 ranking is based on the financial results of publicly traded companies in the Houston area, which were collected and analyzed by S&P Global Market Intelligence. Other charts in this special section are based on information taken from many sources.

The Chronicle developed the ranking criteria, which reflect performance as reported by public companies to the United States Securities and Exchange Commission.

The tables used figures reported for the calendar years 2019 and 2020, or as close to the calendar year as possible for companies with different fiscal years or reporting schedules. Data may reflect restatements for accounting changes, acquisitions or discontinued operations.

Other information was gathered by Chronicle researcher Katherine Feser, who surveyed businesses to determine the area’s largest employers, private businesses, hospitals and law firms.

Chronicle 100 scores

Houston-area companies were ranked based on a score based on four categories for 2020: total revenue, earnings per share growth, annual revenue growth, and one-year total shareholder return on a reinvested dividend basis.

Companies were ranked according to each of the criteria, with each category having equal weight. The best possible score in each category is 1. To calculate the overall score, the four rankings were added together and then divided by 4. In the event of a tie, the change in earnings per share was used to break it.

To be eligible, a company must have reported earnings for 2020 based on diluted net earnings per share before extraordinary items.

The company’s stock price must have been greater than $1 per share as of April 27, 2021, and it must have been trading throughout 2020. Companies must have had total sales greater than $5 million for 2020 and $2.5 million for 2019.

The Chronicle 100 is drawn from a list of 56 companies that meet the criteria. The other public company charts are based on a set of 151 companies.

Kevin Kelly led research for S&P Global Market Intelligence. He can be reached at 303-721-4525 or [email protected] Find more information at

General criteria

To be eligible for charts based on the financial performance of publicly traded companies, a company must be listed on a major stock exchange – New York, Nasdaq or NYSE Amex – and be headquartered in the Houston area. Some companies with dual headquarters, main administrative offices or major operations in the region were considered.

Companies with overseas headquarters were included if their CEOs were based in the Houston area.

Revenue was defined as net sales for 2020. In most cases, sales exclude excise taxes and other non-operating revenue.

For banks and savings and credit, income is equal to total current operating income and net income before securities tax.

For insurance companies, revenue is equal to the sum of earned premiums and net investment income. It excludes equity in other investments and foreign exchange adjustments.

Earnings per share growth was based on the percentage change in earnings per share before extraordinary items. EPS growth may include one-time gains or losses, such as profits on the sale of assets, provided they are reported pre-tax in the income statements.

When the previous year’s earnings per share number was negative, the percentage change was calculated using the absolute difference.

The biggest companies

This table ranks companies according to their annual turnover. To be considered, companies had to be publicly listed on December 31, 2020 and have met other criteria to be considered for the Chronicle 100 table.


This chart shows companies tracked by S&P Global Market Intelligence that have made an initial public offering of stock since 2020. Current market capitalization may include additional shares issued in subsequent offerings and/or private placements.

Revenue increase

The revenue growth chart ranks companies by annual percentage revenue gain in 2020.


S&P Global Market Intelligence ranked bank holding companies and commercial banks by deposits in the Houston area as of June 30, 2020. Data is pro forma for acquisitions closed or announced as of May 11.

Automotive sales

New vehicle models and dealer sales volumes were provided by TexAuto Facts, published by InfoNation, Inc. of Houston. The report is compiled from vehicle title records maintained by the Texas Department of Motor Vehicles.

Communities and home builders

Sales figures for homebuilders and housing starts for the most active communities were provided by Zonda. Homebuilders were ranked based on sales in the Houston area that closed in 2020. The most active communities were ranked based on housing starts in 2020.


Businesses were ranked by the number of full-time and part-time workers they employ in Harris, Montgomery, Liberty, Chambers, Galveston, Brazoria, Fort Bend, Waller, Austin and San Jacinto counties.

The companies provided the figures, some of which are estimates, for a Chronicle survey. Some large employers are not on the list because they do not provide employment figures by city or have declined to participate.

Government entities are generally not included. Some public health establishments are part of the survey.

A separate table of top global employers provided by S&P Global Market Intelligence ranks public companies in Houston based on the number of employees worldwide in 2020.


Area hospitals provided information about their operations in Houston.

Law firms

The chart of the largest law firms is based on a Chronicle survey of firm operations.

Private companies

Companies were ranked by revenue based on a Chronicle survey. In some cases, companies provided estimates. Car dealerships, banks, and law firms and doctors were not included.

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