The 'Big Three' and 'Big Four' consulting firms have grown more similar in recent years

The 'Big Four' consulting firms specialize in accounting

The "Big Four" refers to Deloitte, PwC (also known as PricewaterhouseCoopers), KPMG, and EY. They more recently built out their business consulting practices in addition to accounting services.

The Big Three consulting firms are McKinsey & Company, Boston Consulting Group, and Bain & Company

Some also refer to this group as “MBB.” As a nearly century-old company that’s well known for its prestige, McKinsey has some famous alumni—including Chelsea Clinton and Sheryl Sandberg. The other two consulting firms in the Big Three have employed some famous faces over the years, too.

Consulting firms are known for their relatively high starting salaries

The “Big Three” and the “Big Four” consulting firms especially are known for high pay. Top firms often offer entry-level salaries well over $100K per year.

'The Firm' is a book about the influence of top consulting firm McKinsey

The author argues that consulting firms are so valuable to the companies that hire them because the clients don’t have to take the blame for any changes the consulting firm decides to make within the organization.

Governments are arguably very dependent on consulting firms like McKinsey and Deloitte

This podcast episode discusses the consultancy industry’s rise and how these firms make billions of dollars, even amid significant scandals.

Consulting is more than just giving advice

A deep-dive article from Harvard Business Review argues that many clients of consulting firms need to ask more from these firms and to understand their capabilities, which range from accounting to growth strategy and more.

Modern consulting traces its roots to 1886

Arthur D. Little Inc. was the first management consulting firm. Starting as a chemical analysis lab, the firm evolved to play pivotal roles in projects like developing the NASDAQ system and supporting Apollo 11.

Many of the projects major consulting firms work on are kept secret, some firms provide a few examples of real-world client work

A list of client work examples from McKinsey includes a case study on how the firm helped Starbucks design more inclusive stores, and many more.

How Standard Oil created Chevron and ExxonMobil

Standard Oil was eventually ordered to separate into 34 different entities, and over the following years, those 34 companies merged into what is now called the “Big Four” in the oil industry.

The original 'four horsemen' of tech were Intel, Dell, Microsoft, and Cisco

These companies became known as the "four horsemen of tech" for the influence the companies had both on other businesses and investors in the late 1990s and early 2000s. The expansion of internet infrastructure throughout the 1990s and the dot-com bubble lifted these companies to incredible heights.

Private equity firms can be 'powerful partners' or 'formidable competitors'

Under the best circumstances, PE firms can increase a company's value using strategies that might not be suitable for public companies facing pressure for immediate shareholder returns. But PE firms are often portrayed negatively due to the aggressive strategies they sometimes use to cut inefficiencies. As PE has grown, many firms have changed their strategies, shifting away from aggressive scaling to more integrated acquisitions.

The K-pop industry's Big Four are facing declining stock prices

The major players of the K-pop industry—SM, JYP, YG, and HYBE—are publicly listed companies. Despite huge financial successes, these corporations have recently dealt with plunging stock prices, losing between 29% and 56% of their market cap by late 2024. While there’s no one reason for the recent devaluation, there are signs of slowing enthusiasm and less action from the major players—BTS and Blackpink.

Learn more about the four main market structures

In modern economic theory, there are four main market structures. Under each market structure, firms (or businesses) have differing levels of competition and reach different levels of price efficiency based on the consumer's willingness to pay for a product or service.

The World Bank, IMF, and WTO all face calls for structural reform

Researchers argue that all three major institutions face legitimacy and effectiveness challenges, including outdated governance structures, unequal voting power, and difficulty adapting to a more multipolar world.

The firms running America's voting systems

Three companies make up over 90% of the US market share around voting systems, and like any company, they're priorities aren't always aligned with the public's. Dive into the industry of voting machines in this investigation piece from the Guardian.

The three major credit bureaus were created in the mid-1900s to sort local credit reporting into national databases

In the 1800s, credit bureaus went into business to help lenders make decisions. But today's three major credit bureaus, Experian, Equifax, and TransUnion, didn't become the industry leaders they are today until the 20th century, around the same time FICO was founded.

Harvard Business School adapted its law school's ‘case method’ in MBA classes

Many MBA programs include classes structured around the “case method” rather than traditional lectures. In classes using the case method, students solve real-world business problems without being given the answers ahead of time, rather than listening to a lecture and taking notes.

62% of independent workers said they would prefer permanent or non-contract work

In the consulting firm McKinsey’s 2022 “American Opportunity Survey,” 36% of employed respondents (about 58 million Americans) classified themselves as “independent workers.” But they’re not all thrilled about their current professional status.

League tables show the number of deals top investment banks do in a time period

These tables provide a visual to help keep track of the leading companies in investment banking. Companies such as JPMorgan and Goldman Sachs typically sit up top.

Advertising holding company WPP acquired Ogilvy & Mather in 1989 for $864M

It was the largest amount ever paid for an agency at the time. WPP, which acquired agency J. Walter Thompson for $566M just two years before the Ogilvy & Mather acquisition, still owns Ogilvy today.

A Yale student wrote a profound essay about the consulting industry's influence on elite college students that was published in a book of her writing after she died in a post-graduation car accident.

Principals are important pieces of F1 teams

In the Big Four American sports, teams have a head coach to lead the team and a general manager to run the business side. In Formula 1, they have a team principal, who speaks publicly on behalf of the team, manages the team's personnel, and engages with F1's governing body.

A 'large-cap' company has a market capitalization of more than $10B

The S&P 500 is primarily composed of large-cap companies. The idea is that the index provides a big-picture view of the economy by assessing the performance of many of the largest public companies across different industries. The median market capitalization of companies listed on the S&P 500 is around $40B.

Company names you may have been mispronouncing

Global company names often get Americanized or anglicized to the point where they’re unrecognizable. Here's a helpful explainer on how to say a dozen of them, from Adidas to Huawei.

In 2025, four executives from large tech companies were given positions in the US Army Reserves—including Palantir Chief Technology Officer Shyam Sankar, which reinforced Palantir's ties with the US military and its role as a leading defense partner.

How the checking account has evolved into a platform of features rather than a product

The accounts act as an anchor for customer relationships that banks need to retain said customers. As fintech companies unbundle the checking account without technically being chartered banks, traditional banks face pressure to innovate the checking account experience.

Breaking down the golf world's 4 'major' tournaments

The PGA Tour features over 30 tournaments per year, but none are as important as the four majors: the Masters, the PGA Championship, the US Open, and the Open Championship. This Golf Monthly article dives into each major and the courses it is played on, including the traditions each weekend brings to the Tour.

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

Hedge funds, the private investment firms that trade a wide swath of financial assets, make money by imposing steep fees on investors and from the fund's investment performance.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

Mid-century modern graphic designers, known for their bright colors and bold lines in advertising, also found success with children's books.

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

An initial public offering or 'IPO' is the process of a private company becoming public by putting shares of the company on the stock market for purchase.

Budweiser stores yeast derived from the original 1800s strain in a secret bunker, which only the Head of Yeast Management can access—not even the CEO

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

US consumers collectively owe more than $1T to credit card companies—almost as much as they owe in auto loans.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

Three Ebola species are responsible for most large outbreaks of the disease, yet the only approved Ebola vaccine is known to work against just one of them.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

SpongeBob exemplifies Aristotle's philosophy for living well because he understands that happiness doesn't come from external factors like money, recognition, or power.

Alzheimer's can lead to brain shrinkage, with an average of around 2% of volume reduction per year

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

The most expensive ad of all time was for Chanel No. 5 perfume and cost roughly $33M to produce in 2004—about $57M in today's dollars.

While the sun's gravity keeps the planets in orbit, their gravity also pulls on the sun, causing it and everything else in the solar system to orbit around a mutual balance point called the barycenter—the true center of the solar system.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

Quincy Jones' 'Big Band Bossa Nova' helped introduce bossa nova—a jazz-influenced Brazilian genre—to the US

The syncytiotrophoblast is the outer layer of the placenta and the largest human cell, spanning an area about twice that of a king-sized bedsheet.