9 of Deloitte Biggest Clients (Ranked By Size)

Deloitte is one of the prominent and leading consulting firms which offers its services to many businesses and organizations, but if you are trying to evaluate its prestige, you might want to know about its biggest clients ranked by size.

Although Deloitte works with hundreds of organizations and businesses, I researched extensively and found that Berkshire Hathaway, Microsoft, Dell EMC, and Boeing are its biggest clients by size and revenue.

Here are other companies Deloitte is working with:

• AstraZeneca
• GlaxoSmithKline
• Starbucks
• DXC Technology
• Financial sectors in the Canadian government 

In this detailed guide, I’ll rank 9 of Deloitte’s biggest clients by size and give you an insight into their operating industries. 

1. Berkshire Hathaway – Leading in Deloitte’s Biggest Clients

Berkshire is a distinguished holding company overseeing various businesses like Fruits of the Loom and GEICO. 

This company is in the first position on my list of Deloitte’s biggest clients because it has evolved into one of the World’s largest corporations by market capitalization, with a revenue of 285.50 Billion this year. (Source)

Deloitte plays a pivotal role in the development of Berkshire Hathway by auditing the effectiveness of its internal control over financial reporting for a minimum fee of 44.5 to 49.00 million.

The consulting firm evaluates and tests these areas for Berkshire Hathway:

• Effectiveness of controls concerning goodwill and indefinite-lived intangible assets.
• The capacity of management to precisely predict future revenue.
• Reasonableness of the current revenue and EBIT forecasts.
• Valuation methodologies, discount rates, and terminal growth rates.

(Source)

2. Canadian Government

Recently, a financial institution under the oversight of the government sought Deloitte Canada’s expertise to address an important concern of whether their workforce will have the right skills to do their job in the future. 

Since the Brookfield Institute has projected that 42% of Canadian jobs face reskilling needs within the next two decades, the financial institute of the government wanted Deloitte to futureproof its workforce and identify new ways to invest in upskilling the people. 

The consulting firm started working with its client’s HR department to source data through a series of workshops to get a custom-built solution.

This collaboration went beyond just the data and analysis because Deloitte offered insights and a fresh work angle that surpassed the client’s expectations.

Notably, the client’s board expanded its strategic planning to encompass HR data, exhibiting the far-reaching impact of this partnership.

As this collaboration continues to evolve, Deloitte Canada eagerly anticipates further interaction with the client’s Human Resources Department, showcasing the enduring value of this pivotal alliance with the Canadian Government. (Source)

3. Microsoft

Microsoft Inc is a notable inclusion within the illustrious list of Deloitte’s biggest clients, with a revenue of 211.915 Billion. (Source)

Deloitte is not just a partner with Microsoft on different projects; its role in this relationship extends beyond mere collaboration and has earned the position of its independent auditor. 

Annually, shareholders endorse the appointment of Deloitte & Touche LLP as an independent auditor for Microsoft at the Annual Shareholder Meeting. 

The SEC has set stringent rules, which require Deloitte to rotate partners on Microsoft’s account every five years. These partners include:

• Lead partner
• Concurring partner
• Any partner involved in pivotal decisions related to auditing, reporting, or accounting matters 

(Source)

Deloitte’s collaboration with Microsoft is the perfect example of its role in shaping and safeguarding the financial integrity of some of the world’s most influential companies.

4. Dell EMC

Dell and EMC merger in 2016 was a historical moment in tech history. At that time, leading technology companies were shrinking in size, but these two decided to grow together with revenues reaching up to 102.3 Billion. 

However, both Dell and EMC faced the monumental challenge of integrating a vast workforce spanning 180 countries which required a strategic shift. 

Dell accomplished this remarkable feat with the help of Deloitte. Their professionals worked with Dell to design a novel HR operating model underpinned by its Future of Work framework. (Source)

The team then extended its approach to the cloud-enabled transformation of the HR process through a workforce data management solution known as Workday. 

Deloitte also helped Dell to adopt AI-driven talent acquisition optimization and robotic process automation for streamlined workflows and increased productivity.  

It also recommended Dell and EMC implement a value prioritization framework for identifying critical milestones. Deloitte then executed a customer-centric strategy to achieve 20 percent of opportunities, accounting for 80 percent of the value. 

After recognizing the need for efficiency, Deloitte also helped Dell and EMC to develop digital tools like a welcome eGuide and an e-runbook to provide job information to its employees. 

The Chief Integration officer of Dell said, “Deloitte knew this one had to be different. There was no playbook for this.” Howard Elias added, “From the beginning, Deloitte worked with Rory, me, and the VCIO to understand what we were trying to accomplish in order to help us shape the mechanisms and frameworks to achieve success.”

Deloitte is now working closely with Dell on the further development of automation solutions, and the exciting part is that 70-plus bots are already in operation. (Source)

5. Boeing 

Boeing, with a sight gain in revenue this year (73.60 Billion), has been a top manufacturer of commercial jetliners for many years and a large government contractor as well. 

It has partnered strategically with Deloitte to be the appointed independent auditor for the last few years, and it seems like both companies will continue to collaborate for the years to come. (Source) 

This partnership reflects the prestigious status of Deloitte and underscores the depth of trust and reliability cultivated by Boeing during the course.  

6. AstraZeneca

The impactful collaboration of Deloitte with AstraZeneca, a leading pharmaceutical company, exemplifies its role in driving innovation and transformation. 

AstraZeneca was facing the challenge of managing a substantial inflow of Adverse Event (AE) reports associated with their medicines, which required timely follow-ups with the healthcare professionals.

The pharmaceutical company reached out to Deloitte in 2018 for a solution. 

Deloitte’s strategic guidance led AstraZeneca to explore RPA as a solution, leveraging automation to streamline routine and repetitive processes. 

Deloitte’s expertise in this domain enabled the creation of an industry-first RPA solution that automated AE follow-up and underwent rigorous validation, which has set a pioneering precedent within the pharmaceutical industry.

The RPA solution boosted efficiency and enhanced job satisfaction among AstraZeneca’s workforce. It helps the company to redirect its focus from administrative tasks to value-driven activities. 

Here’s what Robin Kamath, the AstraZeneca IT Capability Lead, has to say about the collaboration, “Deloitte worked with us and embraced our entrepreneurial mindset, we co-invested in the proof of concept, worked as one project team, and we were willing to embrace new technology.”

Deloitte is now working with AstraZeneca to expand this solution into its international market. (Source)

Besides that, the pharmaceutical company once again contacted Deloitte to review the current state of learning as part of its 2025 strategy to produce “Growth Through Innovation.”

The result showed huge opportunities for improvement, and now Deloitte is working with the AZ HR sponsors and enterprise leaders to develop a far-reaching transformation plan. (Source)

7. GlaxoSmithKline 

GlaxoSmithKline, which is another pharmaceutical giant, has undergone a transformative shift in its auditing landscape and selected Deloitte as its new external auditor. 

This significant decision arose after a competitive tender process in which Deloitte emerged as the chosen partner. (Source)

After the current audit, GSK recognized Deloitte’s adept performance and resolved to continue this partnership beyond the current 10-year cycle stipulated for external auditor rotations. (Source)

This decision aligns with GSK’s mission to uphold shareholder interests and also shows the mutual trust and value affirmation between the two entities.

8. Starbucks

Another biggest client of Deloitte that made my list is Starbucks (32.25 Billion revenue), which is a popular coffeehouse chain operating in several countries. 

Starbucks has created a rich history of success through its commitment to transparency and financial accuracy. The company achieved this milestone by hiring Deloitte to meticulously scrutinize its internal control and procedures, which attests to this dedication. (Source)

This partnership shows Starbucks’ pursuit of financial excellence and highlights its adherence to industry-leading standards. 

9. DXC Technology

DXC Technology is a leading player in the IT services sector, and it benefits from Deloitte’s expertise as its independent auditor. (Source)

This shows Deloitte’s commitment to upholding the highest standards of financial integrity and reporting, which is vital for a company of DXC’s stature.

In the end, here’s a summary of how I ranked these 9 biggest clients of Deloitte based on size:

Summing Up!

In this article, I’ve ranked 9 of Deloitte’s biggest clients based on their size (revenue) and examined the tailor-made solutions that the consulting company has offered to them.

While going through these success stories, I learned that Deloitte’s expertise extends far beyond consulting and provides other services to shape the scales of various global businesses. 

Deloitte consistently proves its capability to drive radical change across multiple industries, from pioneering digital transformation initiatives to leading innovative strategies.