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.

Consulting encompasses a wide range of expertise—from management and tech, to finance and PR

At their core, consultants—whether independent or part of firms—help organizations solve problems, refine processes, and achieve goals.

Some argue that America is too dependent on consulting

Many major companies in America—not to mention the federal government—spend thousands of dollars a month paying to contract major consulting firms.

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 global consulting industry was worth roughly $710B in 2023

From 2017 to 2021, the consulting firm McKinsey took in $77M in consulting contracts with just the US Food and Drug Administration alone.

A lot of what consultants do all day is intentionally kept a secret

Consulting firms also often keep their clients private to maximize the sectors they’re able to secure contracts for and avoid any perceived conflicts of interest.

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 'Big Three' asset managers—Vanguard, State Street, and BlackRock—collectively manage more than $30T in assets and are the largest shareholders in roughly 88% of all the companies listed on the S&P 500.

In 2018, roughly one-third of Yale graduates went into either finance or consulting

Every year, top consulting firms head to career fairs at Ivy League universities like Yale across the country. They end up recruiting a significant population of the student body by graduation.

In 2018, roughly 13% of Yale University graduates became consultants

Consulting is a popular career path for today’s top college students. A student newspaper article dives into a Yale University student’s brief love affair with the consulting industry, starting with a depiction of the interview process.

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.

An inside look at what it's like to be a consultant

This video explains the basics of consulting, as well as what it's actually like to be a consultant—from the lifestyle and hours to compensation.

Management consultants deal with solving complex business challenges

Specifically, according to an article from careers site The Muse, a management consultant can be loosely defined as someone who is “a problem solver for some of the more complex business and org structures out there.”

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 pedigree of one’s MBA program matters a lot to elite employers

One expert even said that having an MBA from a prestigious school is “non-negotiable” for certain employers, such as elite management consulting, investment banking, and private equity.

A Yale student wrote a critical essay about the consulting industry's influence on college students

Marina Keegan was a recent Yale graduate set to start her career writing for The New Yorker when she died in a car accident. But before her death, she wrote an essay criticizing the consulting industry's impact on not only her classmates' lives but also their ability to impact the world at large.

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.

Find out how airline mergers created some of today's largest airlines

Four airlines dominate the US commercial airline industry: Delta, United, Southwest, and American. Many of these large companies secured their top spots in the industry via a series of mergers and acquisitions starting in the 1970s, when American acquired Trans Caribbean Airlines.

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.

Private equity deals sometimes come with layoffs.

Explore the differences between private equity, venture capital, and hedge funds

Private equity firms focus on buying and improving private companies with the intent to sell them for profit or take them public. Venture capital is technically a form of private equity in which investors focus on startups and generally don't seek majority control of the company. Hedge funds are pooled investments for sophisticated investors that pursue a wide range of often complex strategies.

Many investment bankers work on mergers and acquisitions

At some point in their careers, many investment bankers work on facilitating or advising clients on mergers or acquisitions. From analyzing industry group trends to deal negotiations, an M&A in investment banking explainer outlines how investment bankers handle these business transactions.

Ogilvy & Mather rebranded to just ‘Ogilvy’ in 2018

This was far from the first brand evolution the agency itself has gone through in its more than century-long history. The agency now known as “Ogilvy” started as a London advertising agency founded in 1850 by Edmund Mather. By 1964, it became known as Ogilvy & Mather after merging with a New York City agency that was founded in 1948 by David Ogilvy.

Ten people on Goldman Sachs’ 31-person senior management committee are women

However, only two of those 10 women were in charge of a revenue-generating business arm. Learn more about what it’s like to be a woman in investment banking—and about Goldman’s recent gender discrimination settlement.

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.

Tech, finance, and consulting industries hire roughly 70% of students from top MBA programs.

Even iconic companies can get dropped from the Dow

The Dow’s lineup evolves as the economy changes. General Electric, part of the original 1896 index, was removed in 2018, after 122 years. ExxonMobil, once the world’s largest company, was replaced by Salesforce in 2020.

In late 2025, the top 10 companies in the S&P 500 made up more than 40% of the index's total value

This raised concerns for investors about the index's risk exposure. As many large tech companies continued posting record highs, analysts argued that the top-heavy index was becoming less representative of the economy as a whole.

The Dow now tracks 30 major US companies across various industries

Since 1928, the DJIA has included 30 firms. Today's group spans technology, healthcare, and finance—with Apple, Microsoft, JPMorgan Chase, Pfizer, and Coca-Cola among its most recognized components.

Y Combinator changed the way startups around the world are built

Many of the philosophies that the leaders of Y Combinator have infused into the program’s portfolio companies have become the playbook for building the next big thing, such as its focus on founder personality and more.

Slick interfaces and bundling helped solidify Excel as the corporate planning tool

First initiated in the 1980s, the Excel spreadsheet built off predecessors like Lotus and VisiCalc, leveraging a novel graphic interface to entice new customers and packaging the program with other Microsoft Office products. Forty years later, the tool faces challenges from Google and AI, but retains devoted users.

See US News’ most recent business school ranking

Although Harvard is often cited as the most prestigious MBA program in the US (given that it is considered to have pioneered the modern version of the MBA), US News ranked the University of Pennsylvania’s Wharton as 2025’s best business school.

Finance is among the most popular specializations for MBA students

MBA specializations allow students to concentrate on a specific field during their studies. Other popular concentrations include marketing, entrepreneurship, and consulting. Learn more about MBA specializations in this article.

The MBA has been the most popular graduate degree in America since 2010

Referring to MBA programs as “corporate America’s breeding ground,” comedian Dan Toomey recently interviewed experts on MBAs like Adam Grant, as well as MBA students themselves, to get a better idea of why the degree is so popular. Warning: profane language and content.

McKinsey cashed in by consulting for both companies and their regulators

While McKinsey worked with e-cigarette maker Juul, it also consulted for the US Food and Drug Administration's department regulating vaping and nicotine.

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.

See a list of 2024’s top 10 VC firms

A list of the top 10 VC firms, like Sequoia Capital and Andreessen Horowitz, ranked by assets under management shows how those two firms stack up against their competitors—and what kinds of companies those competitors invest in.

The ‘three-martini lunch’ was popularized on Madison Avenue

Advertising executives working on Madison Avenue in the 1960s and ’70s popularized the so-called “three-martini lunch” between businesspeople during the work week. Admen of the time supposedly believed alcohol brought more creativity to the second half of their workday. This article explains why three-martini lunches are no longer commonplace.