The agriculture and food production industry employed more than one billion people as of last year, or a third of the global workforce. While the industry is substantial, a relatively small number of companies wield an enormous amount of influence.

In its 2013 report, “Behind the Brands,” Oxfam International focused on 10 of the world’s biggest and most influential food and beverage companies. These corporations are so powerful that their policies can have a major impact on the diets and working conditions of people worldwide, as well as on the environment. Based on the report, these are the 10 companies that control the world’s food.

Click here to see the companies that control the world’s food.

In an interview with 24/7 Wall St., Chris Jochnick, director of the private sector department at Oxfam America, discussed the impact that these 10 companies have on the world. “If you look at the massive global food system, it’s hard to get your head around. Just a handful of companies can dictate food choices, supplier terms and consumer variety,” Jochnick said.

These 10 companies are among the largest in the world by a number of measures. All of them had revenues in the tens of billions of dollars in 2013. Five of these companies had at least $50 billion in assets, while four had more than $6 billion in profits last year. Additionally, these 10 companies directly employed more than 1.5 million people combined — and contracted with far more.

Nestle is the largest of these 10 companies. Converted into dollars, Nestle had more than $100 billion in sales and more than $11 billion in profits in 2013. The Switzerland food giant alone employed roughly 333,000 people.

Many of these companies and their brands are extremely well known. One reason is that they often spend huge sums on advertising. Nine of these 10 companies were among the 100 largest media spenders in the world in 2012. Coca-Cola (NYSE: KO), the world’s sixth largest advertiser, spent more than $3 billion in 2012 on advertising. Unilever’s media expenditure, at $7.4 billion, was the second-highest worldwide.

With such scale, many of these companies’ policies — including advertising, food ingredients, environmental impact, and labor practices — have an significant impact on millions of lives. Often, these companies have been reluctant to address issues related to their environmental impact and the quality of life of workers in their supply chain. According to Jochnick, many of these companies are “unaware of the social and environmental impact that they are creating or facilitating.”

However, not all the companies are reluctant to address these problems. None of the 10 companies was better-rated by Oxfam than Nestle, which was closely followed by Unilever. Still, even these companies had problems, according to Oxfam’s 2013 report. In 2011, Nestle discovered cases of children working in its cocoa supply chain, as well as instances of forced labor. A supplier of palm oil for Unilever was accused of illegal deforestation and forcible land grabs.

A strong public profile, as well as consumer awareness, may lead these companies to address issues of concern. “A company that is good and trusted ought to be a company that is aware of, and taking steps to avoid, serious human rights or social or environmental problems that it is part of,” Jochnick said.

Some companies have taken steps towards becoming better corporate citizens. General Mills and Kellogg, which have been among the 10 companies Oxfam studied, have implemented new policies to address important issues such as climate change. Both companies recently committed to disclosing and reducing greenhouse gas emissions in the coming years.

Based on Oxfam International’s 2013 report, “Behind the Brands: Food justice and the ‘Big 10’ food and beverage companies,” 24/7 Wall St. reviewed the 10 companies that control the world’s food. We also added information on each company’s revenue, net profit, total assets, and employee count from their most recent annual report. Data were translated from foreign currencies based on the exchange rate on the final date of each company’s reporting period. Information on companies’ brands come from corporate websites and Oxfam. Data on 2012 advertising expenditures are from Advertising Age’s report, “Global Marketers 2013,” and are estimates. Estimates for Mars Incorporated, which is privately held, are from Forbes’ report “America’s Largest Private Companies 2013.”

These are the companies that control the world’s food.

Associated British Foods plc
> Revenue: $21.1 billion
> Advertising spending: N/A
> Profits: $837 million
> Employees: 112,652

Associated British Foods is a U.K. food manufacturer that has built out a global presence largely through acquisitions. Associated British Foods operates sugar factories, sells food ingredients to wholesale and industry customers, and manufactures consumer products such as Mazola corn oil and Twinings tea. According to Oxfam, the company received low marks for its practices in water use, having failed to conduct impact assessments, while also failing to adopt strong practices in managing its water supply chain.

The Coca-Cola Company
> Revenue: $46.9 billion
> Advertising spending: $3.0 billion
> Profits: $8.6 billion
> Employees: 130,600

Coca-Cola is among the most valuable brands in the world. In total, Coca-Cola and its bottlers sold sold 28.2 billion cases worth of drinks, of which 47% were “trademark Coca-Cola.” In total, sales for The Coca-Cola Company were nearly $47 billion in its latest fiscal year. Overall, The Coca-Cola Company scores well for a number of practices, including addressing inequality for women working in production and supporting female empowerment for workers in its supply chain. The company is also well-rated for its land-management practices.

ALSO READ: Cars Most Likely to be Dumped

Groupe Danone S.A.
> Revenue: $29.3 billion
> Advertising spending: $1.2 billion
> Profits: $2.0 billion
> Employees: 104,642

France’s Groupe Danone has a truly global presence. Its largest market, by sales, is Russia, followed by France, the U.S., China, and Indonesia. According to the company, Danone is the world’s largest seller of fresh dairy products, which accounted for 11.8 billion euros in revenue, or over half of the company’s total sales in 2013. Danone is also among the world’s largest sellers of early life nutrition products and bottled waters. Danone received high scores for its policies in a number of major issues, including transparency and managing water resources. However, the company also received low scores in other policies, including its handling of land and farming issues. Danone received the lowest score of any company from Oxfam for its policies regarding women’s issues in agricultural production.

General Mills, Inc. (NYSE: GIS)
> Revenue: $17.9 billion
> Advertising spending: $1.1 billion
> Profits: $1.8 billion
> Employees: 43,000

General Mills owns a number of America’s best-known brands, including Betty Crocker, Green Giant, and Pillsbury. No company received a lower rating from Oxfam for its overall approach to major policy issues. General Mills had the lowest scores in awareness and policies regarding climate change. Recently, however, General Mills announced new initiatives designed to reduce greenhouse gas emissions in its supply chain. As part of the announcement, General Mills also pledged to implement specific emissions targets, to review supplier practices, and to name its largest suppliers of palm oil and sugar in order to improve transparency.

ALSO READ: America’s Fastest-Growing Retailers

Kellogg Company (NYSE: K)
> Revenue: $14.8 billion
> Advertising spending: $1.1 billion
> Profits: $1.8 billion
> Employees: 30,277

Among the top food companies, Kellogg is the smallest by revenue. Still, as of 2013, the company had nearly $15 billion in sales, a similar amount in total assets, and more than 30,000 employees. Kellogg also owns a large number of very well-known brands, including Kellogg’s cereal, Keebler, and Pringles, which it acquired in 2012 for $2.7 billion. According to Kellogg, it is the world’s leading cereal company and the second-largest maker of cookies. In all, Kellogg makes 1,600 different foods, which it sells in more than 180 different countries. Kellogg received a lower overall rating from Oxfam for its practices than all but two of the other 10 companies. However, in a recent release, Oxfam praised Kellogg for its pledge to cut greenhouse emissions in its supply chain.

Mars, Incorporated
> Revenue: $33.0 billion
> Advertising spending: $2.2 billion
> Profits: N/A
> Employees: 60,000

Mars is the the only one of the world’s 10 largest food companies that is privately owned. Mars owns several well-known chocolate brands, such as M&Ms, Milky Way, Snickers and Twix. Mars also owns a range of food brands such as Uncle Ben’s rice, as well as chewing gum and candy-maker Wrigley. Among the big 10 global food companies, Mars received the lowest policy ratings for water and land issues. In both cases, Oxfam penalized the company for its lack of knowledge of its environmental impact, as well as for its supplier policies.

Mondelez International, Inc. (NASDAQ: MDLZ)
> Revenue: $35.3 billion
> Advertising spending: $1.9 billion
> Profits: $3.9 billion
> Employees: 107,000

In 2012, Kraft Foods split into two separate companies, Kraft Foods Group and Mondelez. While Kraft Foods Group took North American grocery brands, Mondelez took its snacks and candies brands, which include Cadbury, Nabisco, Oreo, and Trident, among many others. The company had over $35 billion in revenue and more than $72 billion in assets as of last year. It also employed 100,000 workers worldwide. According to Oxfam, Mondelez received low marks for its transparency, as well as for its handling of issues related to climate change and workers.

ALSO READ: America’s Best Companies to Work For

Nestle S.A.
> Revenue: $103.5 billion
> Advertising spending: $3.0 billion
> Profits: $11.2 billion
> Employees: 333,000

By many measures, Nestle is the largest of the 10 food companies, with more than 92 billion Swiss francs in revenue last year — net profit and total asset figures that dwarf other food companies — and roughly 333,000 employees. Nestle is also the top-rated company by Oxfam for its approach to major policy issues. It received the highest scores for addressing transparency, water use, and climate change of any major food company. In its 2013 report, Oxfam highlighted Nestle’s efforts in addressing labor abuses the company discovered in its cocoa supply chain in the Ivory Coast.

PepsiCo Inc. (NYSE: PEP)
> Revenue: $66.4 billion
> Advertising spending: $2.5 billion
> Profits: $6.7 billion
> Employees: 274,000

In addition to owning famous soda brands such as Pepsi, Mountain Dew, and Gatorade, PepsiCo also controls food brands such as Tostitos, Doritos, and Quaker. PepsiCo also employed nearly a quarter of a million people worldwide at the end of 2013. Pepsi was among the world’s biggest advertisers. Advertising Age estimates that PepsiCo’s worldwide media spending totalled $2.5 billion in 2012. According to three groups that measure brand value — Interbrand, BrandZ, and CoreBrand — Pepsi is one of the world’s most valuable brands in any industry. While PepsiCo received a lower score on policy issues than three other companies reviewed by Oxfam, it has developed a reputation for company responsibility in at least one area. CEO Indra Nooyi has pushed for healthier products in her time at the helm of the company.

ALSO READ: 10 Cities Running Out of Water

Unilever Group
> Revenue: $68.5 billion
> Advertising spending: $7.4 billion
> Profits: $6.7 billion
> Employees: 174,381

Unilever products are hardly limited to food and drinks. The U.K.- and Netherlands-based group also makes personal care and home care products. Still, its foods and refreshments businesses accounted for almost 23 billion euros of the company’s nearly 50 billion euros in revenue last year. Brands owned by Unilever include Lipton tea, Hellmann’s mayonnaise, and Ben & Jerry’s ice cream, to name only a few. Unilever generally scores fairly well for its efforts in addressing policy issues. Oxfam rated it above all other companies for its worker and farming policies. Only Nestle received a higher overall rating for its handling of the issues highlighted by Oxfam.

Thank you for reading! Have some feedback for us?
Contact the 24/7 Wall St. editorial team.