McKinsey & Company
Management Consulting and Strategic AdvisoryFounded 1926- Updated June 2025
Reviewed by Swet Parvadiya
Last reviewed: June 2025
CorpDigest
McKinsey & Company
Company History
Founded 1926 in New York, NY
Last reviewed: 2025-06-05 · By Swet Parvadiya
James O. McKinsey founded his firm in Chicago in 1926 with a proposition that was genuinely novel at the time: that trained outsiders with analytical discipline could diagnose and fix the management problems of large corporations more reliably than the executives running those companies. The accounting profession and the engineering profession had already been formalized. Management consulting had not.
The firm relocated to New York City in 1934, following the concentration of corporate headquarters that defined American business geography in the mid-twentieth century. McKinsey died in 1937. Marvin Bower, a Harvard Law School and Harvard Business School graduate who had joined in 1933, purchased the firm in 1939 for a price that has never been publicly disclosed. Bower's vision was a firm modeled on the elite law firm: independent, professionalized, operated in the client's interest rather than the firm's commercial interest.
Bower became Managing Director in 1950 and spent two decades building the cultural and operational framework that persists today: the up-or-out promotion system that ensures constant turnover of talent and prevents organizational stagnation; the commitment to declining business that conflicts with objective advice; the "one firm" profit pool that prevents partner territorialism. By 1970, the firm had expanded globally and the global structure was formalized under the "one firm" principle.
The QuantumBlack acquisition in 2012 brought data science and advanced analytics capability. Orphoz in 2019 and Panorama in 2020 added implementation and change management services — a significant expansion away from the pure-advisory positioning that Bower had insisted upon, driven by client demand for partners who would help execute, not just recommend.
James O. McKinsey founded his eponymous firm in Chicago in 1926, introducing the radical proposition that management itself could be subjected to the same rigorous, quantitative analysis as financial accounting. His 1924 book, 'Budgetary Control for Executive Management,' laid the intellectual foundation for the modern consulting industry. Although he died suddenly in 1937, leaving the firm in a state of uncertainty, his vision of management as a distinct, professional discipline separate from accounting and engineering was the seed from which the global consulting industry would grow. His emphasis on quantitative rigor and objective analysis remains the bedrock of the firm's problem-solving methodology today.
Marvin Bower is the foundational figure who transformed McKinsey & Company from a modest, struggling practice into the preeminent global management consulting firm. Following the death of James O. McKinsey in 1937, Bower orchestrated the purchase of the firm in 1939 to prevent it from being subsumed by a larger accounting practice. He established the core principles that define the firm to this day: the obligation to put the client's interests ahead of the firm's, the commitment to maintain the strictest confidentiality, and the refusal to accept contingency fees. Bower formalized the 'up-or-out' system, the partnership model, and the 'one firm' culture, creating a structure that would attract and retain the brightest minds in the world and establish the professional standards of the modern consulting industry.
James O. McKinsey, a University of Chicago accounting professor, founds the firm in Chicago, introducing the radical proposition that management could be subjected to rigorous quantitative analysis.
James O. McKinsey moves the firm's headquarters to New York City to be closer to the center of American corporate power, seeking to expand its client base among the nation's largest industrial corporations.
Following James O. McKinsey's death in 1937, Marvin Bower and a group of partners purchase the firm from the estate, preventing a merger with an accounting firm and establishing the firm's independence.
Marvin Bower is officially appointed Managing Director, cementing his vision of management consulting as a distinct, elite profession and formalizing the firm's partnership structure and ethical codes.
McKinsey aggressively expands its international footprint, establishing offices across Europe and Asia, and formally implements the 'one firm' global profit pool to incentivize cross-border collaboration.
The firm's 'up-or-out' system generates a massive alumni network that permeates the Fortune 500 C-suites, creating a self-reinforcing ecosystem that solidifies McKinsey's dominance in the pure-play strategy market.
McKinsey formally expands its advisory services to non-profits and government entities, recognizing the growing demand for strategic management principles in the public and social sectors.
McKinsey acquires the London-based AI and advanced analytics firm QuantumBlack, marking a pivotal strategic shift toward digital transformation and establishing a dedicated unit for enterprise AI.
Bob Sternfels, a veteran of the firm's operations and digital practices, is elected as the first non-strategy consultant to lead the firm, signaling a major shift toward implementation and technology services.
McKinsey reports an estimated $16 billion in global revenue, reflecting the success of its aggressive expansion into digital, AI, and implementation services, which now account for a significant portion of the firm's total revenue.
McKinsey acquired QuantumBlack, a data science and analytics firm founded by Formula 1 racing professionals who had developed advanced performance analytics, to build proprietary data science capabilities at a time when big data was emerging as a strategic consulting topic. QuantumBlack had developed sophisticated statistical modeling and data visualization methods.
McKinsey acquired Orphoz, an organizational transformation and change management consultancy based in France, to strengthen its capabilities in helping companies implement large-scale organizational restructuring. Orphoz specialized in behavioral change and culture transformation that determines whether strategy implementations succeed or fail.
McKinsey acquired Panorama, an education technology analytics company, to build capabilities serving the K-12 education sector where data analytics tools were increasingly important for improving student outcomes and administrator decision-making. The acquisition extended McKinsey social sector practice with technology assets.
James O. McKinsey founded his firm in Chicago in 1926 with a proposition that was genuinely novel: trained outsiders with accounting and analytical discipline could diagnose and fix corporate management problems more reliably than executives running those companies. McKinsey was a University of Chicago accounting professor who had developed a framework he called 'general survey' — a comprehensive top-down review of every business function. His early clients included major Chicago manufacturers and retailers. In 1934 he moved the firm to New York to be closer to corporate power. McKinsey died in 1937, and his partners faced a choice: merge with accounting firm Scovell Wellington or remain independent. Marvin Bower led the faction that chose independence, purchased the firm from the estate, and renamed it McKinsey & Company in 1939. Bower's 28-year influence as managing director (1950–1967) was more transformative than McKinsey's original founding: he established the partnership structure, the 'up-or-out' hiring model, the commitment to confidentiality, and the professional standards that defined management consulting as a distinct elite profession. Revenue reached an estimated $16 billion by FY2024.
Marvin Bower is more responsible for the modern McKinsey than its founder. After James McKinsey died in 1937, Bower spent three decades codifying a professional identity for management consulting modeled on law and medicine. His core principles: consultants should give clients honest advice even when it's unwelcome; the firm should hire from the best universities and promote only those who prove exceptional; consultants should never reveal what they learn from one client to another; the goal is service to clients, not profit for partners. Bower famously declined to rename the firm after himself when he became managing director — he believed the institution should outlast any individual. He also insisted on a strict up-or-out model: associates who did not advance to partner within a defined window had to leave. This created a highly competitive, self-selecting institution. The alumni this model produced populated C-suites across American and global corporations, creating the feedback loop that made McKinsey clients trust its recommendations — 'McKinsey people' were credible because their colleagues elsewhere in industry had been through the same rigorous training.
Rajat Gupta led McKinsey from 1994 to 2003, nearly doubling the firm's headcount and revenue during an era of extraordinary global consulting demand. He expanded McKinsey aggressively into emerging markets and healthcare, and his three consecutive terms as managing director broke precedent. After leaving McKinsey, Gupta joined several corporate boards including Goldman Sachs. In 2011 the government charged him with insider trading, alleging he passed material non-public information from Goldman Sachs board meetings to Raj Rajaratnam of the Galleon Group hedge fund. Gupta was convicted in 2012 and sentenced to two years in prison. The conviction was catastrophic for McKinsey's carefully constructed reputation for integrity and confidentiality. The firm's core value proposition — that clients could trust McKinsey with their most sensitive strategic information — was directly undermined by its former managing director leaking boardroom conversations. McKinsey did not face institutional charges, but the reputational damage required years of deliberate effort to repair, including stricter conflict-of-interest policies and partner conduct standards.
McKinsey's work for OxyContin manufacturer Purdue Pharma became one of the most damaging controversies in consulting history. McKinsey had advised Purdue for years, with work including strategies to 'turbocharge' OxyContin sales during the peak of the opioid epidemic. In 2021, McKinsey reached a $573 million settlement with 47 U.S. states over its opioid-related consulting work — the firm agreed to pay without admitting wrongdoing. Documents uncovered in litigation showed McKinsey had developed specific strategies to push back against FDA restrictions and increase opioid prescribing. Beyond opioids, McKinsey faced scrutiny over work with the South African government under the Zuma administration (linked to state capture), work with authoritarian governments including Saudi Arabia, and allegations that consulting recommendations contributed to mass layoffs and public-sector dysfunction. Managing partner Bob Sternfels, appointed in 2021, initiated reforms to client-acceptance standards. The controversies revealed the tension in McKinsey's model: serving whoever will pay the highest fees conflicts with the professional-integrity positioning that defines the firm's brand.
McKinsey's revenue growth reflects both the expansion of management consulting demand globally and McKinsey's increasing scope into digital, analytics, and implementation services beyond traditional strategy advice. Revenue was approximately $10 billion in 2018, grew to $13.5 billion in FY2022, $14.7 billion in FY2023, and $16 billion in FY2024. The growth drivers are several: First, geographic expansion into emerging markets — Asia, Latin America, and Middle East now account for a significant share of revenue. Second, digital and analytics services — McKinsey's QuantumBlack AI practice and McKinsey Digital have expanded the firm's addressable market into technology transformation, not just strategy. Third, higher average engagement value — the move toward large-scale transformation programs rather than discrete strategy projects has increased per-client revenue. Fourth, private equity advisory — McKinsey has developed significant practices serving private equity firms with due diligence, portfolio company strategy, and performance improvement. The firm does not disclose revenues publicly since it is a private partnership, making growth estimates subject to some uncertainty.