Every word in the English language carries a precise definition as outlined in dictionaries. While some words are confined to one or two meanings, others can be applied in various contexts to depict diverse scenarios. The term 'evil' is a prime example of a word with a somewhat subjective interpretation. What one individual deems evil might not be perceived the same way by someone else.
This is a crucial consideration when reflecting on the 10 most infamous business leaders in modern history. Executives from companies of all sizes have repeatedly engaged in actions that could be labeled as evil, yet only a select few have earned the infamy their misdeeds warrant. These acts can include direct harm, endorsing practices that result in fatalities, or misleading employees and the public while embezzling vast sums of money.
The individuals listed below have perpetrated deeds that earn them a place among the Top 10 most notorious business figures in recent history. Ranked from 10 to 1, their offenses span from financial fraud to enabling large-scale loss of life. Without further delay, here are the most infamous business leaders.
10. Dennis Kozlowski CEO Tyco

Kozlowski’s professional journey seemed like a classic success story, transitioning from humble beginnings to immense wealth. Starting in modest circumstances, he climbed the corporate ladder to become Tyco’s CEO. However, driven by greed and a lack of ethical grounding, Kozlowski embezzled $600 million from the company for personal gain. His extravagant lifestyle featured $6,000 shower curtains, opulent parties funded by Tyco (as shown in the image above), and fraudulent bonuses he falsely attributed to the Board of Directors. Kozlowski is now serving a prison sentence ranging from 8 to 25 years. Despite his actions, Tyco managed to endure his leadership.
9. Richard Scrushy CEO HealthSouth

Richard Scrushy’s tenure at HealthSouth was marred by a litany of unethical actions. He faced two separate trials, each involving 30 counts of illegal activities during his time as CEO. His offenses included silencing whistleblowers, bribery, falsifying financial records, extortion, money laundering, and mail fraud, among others. While he escaped conviction in 2003 on the initial charges, he was found guilty on 30 new counts in 2007 and sentenced to nearly seven years in prison. Despite Scrushy’s misconduct, HealthSouth continued to operate.
8. Joe Nacchio CEO Qwest Communications

During his tenure as Qwest’s CEO, Joe Nacchio demonstrated a consistent pattern of deceit for personal gain. He misrepresented the company’s financial health by exaggerating revenue figures and falsely announcing government contracts that never materialized. Additionally, he unlawfully benefited from a surge in Qwest’s stock prices. Nacchio faced a $19 million penalty, was compelled to surrender $52 million earned through illicit trading, and received a six-year prison sentence. He began serving his term in 2009, and Qwest was later acquired by CenturyLink Communications.
7. Sanjay Kumar CEO Computer Associates

Kumar, the former CEO of Computer Associates, initiated fraudulent activities before the year 2000. His schemes included manipulating contract dates and extending accounting periods, famously referred to as the '35-day month.' While his actions may not appear overtly malicious, the scale of his deceit was monumental. Kumar and his associates embezzled $2.2 billion from Computer Associates over several years. He was sentenced to 12 years in prison, and the company underwent a rebranding.
6. Jeffrey Skilling Chairman at Enron Corporation

As a key figure at Enron, Skilling promoted the controversial mark-to-market accounting method. This approach enabled Enron to inflate energy prices by valuing assets based on projected future earnings. He also approved the creation of Chewco, an Enron subsidiary designed to conceal the company’s mounting debt. Skilling received a prison sentence of 24 years and 4 months. Enron’s eventual downfall resulted in the loss of jobs and savings for thousands of employees.
5. Kenneth Lay CEO at Enron Corporation

Lay collaborated with Skilling in manipulating Enron’s financial records, significantly inflating the company’s assets over several years. His actions, alongside Skilling’s, contributed to Enron’s collapse in 2001, marking the largest bankruptcy in U.S. history. Lay’s unethical practices resulted in 20,000 employees losing their jobs and countless individuals seeing their life savings, tied to Enron stocks, wiped out.
4. Robert Rubin Chairman at Goldman Sachs

Robert Rubin is among the few individuals directly associated with the 2008 global financial crisis. As Treasury Secretary under President Bill Clinton, Rubin played a pivotal role in deregulating the U.S. financial system. His efforts, including the repeal of the Glass-Steagall Act, enabled major banks to risk taxpayer money on unstable markets. This led to the rise of institutions like CitiGroup, deemed 'too big to fail.' Rubin amassed $120 million from Citi, even as the bank’s poor investments necessitated a $45 billion government rescue.
3. Leopold II, King of the Belgians Head of Congo Free State

Leopold II exploited the 1884 Berlin Conference to seize control of the Congo region in Africa. He created a private enterprise disguised as a sovereign state, known as the Congo Free State. As its leader, Leopold wielded absolute authority, deploying a private army, tax collectors, and militias to exploit the region’s ivory and rubber resources for profit.
The horrors inflicted by Leopold’s forces are too extensive to fully recount. In summary, his troops enslaved locals to harvest ivory and rubber for his company. Those who failed to meet quotas were executed, families were held hostage to ensure compliance, and severed hands were collected as proof of killings.
When Leopold established the Congo Free State, Africa’s population was estimated at 90 to 130 million. Under his rule, an estimated 10 to 22 million people were killed. European powers eventually pressured Leopold to transfer control of the Congo Free State to Belgium in 1908, but he never faced justice for his crimes. He died as Europe’s wealthiest man, spending his vast fortune on luxury yachts, estates, and underage prostitutes.
Evil manifests in countless forms. While some individuals on this list may not appear overtly malevolent, their actions—lying, defrauding, and profiting illegally—are undeniably evil. If an act requires deception and secrecy, can it truly be considered virtuous? Others on this list have indisputably earned their place by endorsing murder and genocide. This compilation underscores that evil takes many shapes, and a lack of direct involvement does not absolve one of complicity in wicked deeds.
2. Hermann von Siemens Siemens AG

Hermann von Siemens led Siemens during World War II, but the company’s dark history predates the conflict. Siemens played a significant role in aiding the Nazi regime by rebuilding the German military, enhancing infrastructure, and contributing to the systems that facilitated the Holocaust.
Under von Siemens’ leadership during the war, Siemens operated factories within the notorious Auschwitz and Buchenwald concentration camps. Jewish prisoners were forced into slave labor, producing electrical components for military purposes. Many of these laborers later perished in gas chambers constructed by Siemens at these camps.
1. Walton Family Wal-Mart

Sam Walton and his brother established Wal-Mart in 1962, and today it stands as the world’s largest private employer and retailer. Despite its staggering wealth, estimated at $421 billion, the company is equally notorious for its unethical practices. Wal-Mart is frequently criticized for treating employees as expendable, a fact starkly illustrated by the case of 52-year-old Deborah Shank.
After Shank was paralyzed in a crash with a semi-truck, her family was granted $700,000 in damages. However, Wal-Mart seized the $417,000 remaining after legal fees, citing a clause in her employment contract that entitled the company to any damages awarded to employees. This left her family reliant solely on Medicaid and Social Security to cover her care.