How Much is Dennis Kozlowski Worth? Dennis Kozlowski - Is the Star a Billionaire? Net Worth 2026: Career Earnings & Assets

Many fans are curious about Dennis Kozlowski's financial success in April 2026. Our team analyzed the latest data to provide a clear picture of their income.

What Is Dennis Kozlowski's Net Worth?

Dennis Kozlowski's most famous extravagances included a $30 million NYC apartment that was paid for by Tyco. This apartment famously featured a $6,000 shower curtain and a $15,000 dog umbrella stand.

Dennis Kozlowski is an American businessman and convicted criminal who had a peak net worth of $600 million. Dennis Kozlowski served as the CEO of Tyco International for two decades. While serving as CEO of Tyco, Dennis gained considerable notoriety for his lavish parties and lifestyle that were funded by Tyco. In 2002, he resigned amid a massive scandal involving financial fraud. Kozlowski received a conviction in 2005 and served around nine years in prison before his conditional release in early 2014.

In 1975, Kozlowski joined the security systems company Tyco International; in 1992, he became its CEO. In that position, he led the company through a major expansion fueled by a series of mergers and acquisitions. Throughout the '90s, Tyco acquired such companies as Preferred Pipe, Thorn Security, Sempell, Raychem, Wormald International, Tectron Tube, ElectroStar, Submarine Systems, and Professional Medical Products, among many others. In 1997, Tyco merged via reverse takeover with the security services company ADT, as a result, moving its incorporation to the tax haven of Bermuda.

Tyco also spent $1 million on a lavish 40th birthday party for Dennis' former wife on the Italian island of Sardinia. In total, Dennis received more than $150 million in cash and bonuses from Tyco and earned an additional $430 million by artificially inflating the company's stock price. In addition to jail time, Kozlowski was ordered to pay $134 million back to Tyco and a $70 million fine to the US government.

Kozlowski and Tyco continued to aggressively acquire companies into the new millennium, with notable purchases including General Surgical Innovations, AFC Cable, Siemens Electromechanical Components, and Mallinckrodt. However, despite its myriad acquisitions, Tyco incurred major losses as well, including a $3 billion loss in the fiscal year 2002.

In 2002, Kozlowski resigned as Tyco CEO amid a massive financial fraud scandal. The company was alleged to have violated the Securities Exchange Act by failing to disclose crucial financial information and reporting inflated earnings. Dennis himself was tried twice; during his trials, he denied ever committing a crime as CEO. Despite his claims, both he and former Tyco CFO Mark Swartz were convicted in 2005 on multiple counts of securities fraud, grand larceny, and falsifying business records. Kozlowski's specific crimes included receiving $81 million in apparently unauthorized bonuses and paying former Tyco director Frank Walsh a $20 million investment banking fee.

Dennis was eventually tried and convicted of receiving unusually high bonuses and paychecks totaling more than $80 million. He was also convicted of illegally receiving $14 million worth of art and fraudulently authorizing a $20 million payment to a Tyco investment banker. He was sentenced to serve 8 to 25 years in prison at Mid-State Correctional Facility.

Dennis Kozlowski was born Leo Dennis Kozlowski on November 16, 1946, in Newark, New Jersey. He is the son of Leo Sr., who worked for the Public Service Transport, and Agnes, who worked for the Newark Police Department. Both of his parents were second-generation Polish-Americans. As a young adult, Kozlowski went to Seton Hall University in South Orange, New Jersey.

Ultimately, Dennis Kozlowski's financial journey is a testament to their success.

Disclaimer: All net worth figures are estimates based on public data.