Billionaire Profile
Diamantis Diamantides & family
Global Rank
#3057

Image: Public domain | via Wikimedia Commons

Diamantis Diamantides & family

CEO, Delta Tankers
GR
Real-Time Net Worth
$1B
As of December 2025
Age
78
Source
Shipping
Industry
logistics
Citizenship
GR

Biography

Diamantis Diamantides, a Greek shipping magnate, is the founder of Delta Tankers and Marmaras Navigation. With a net worth of $1.0 billion as of December 2025. His career began in 1976 with the founding of Marmaras Navigation, followed by Delta Tankers in 2006. The family's wealth is primarily derived from shipping, with a combined fleet of 56 tankers and bulk carriers. Diamantides is recognized for his low-profile approach and his commitment to philanthropy, supporting education and science through the "Propontis" Foundation.

Wealth Over Time

In-Depth Profile

Early Life

Diamantis Diamantides comes from a family with deep roots in the shipping industry, beginning his career in maritime in 1976-1977 with the acquisition of his first vessel. Diamantides is known for being unconventional and low-profile. Diamantides is also a collector of art works and vintage cars.

Rise to Success

Diamantis Diamantides founded Marmaras Navigation in 1976. In 2006, he established Delta Tankers, which owns and operates a fleet of tankers. Delta Tankers is active in the suezmax and VLCC sectors. Diamantides' son, Paschalis, founded his own firm, Velos, in 2019. Diamantides also owns large land holdings in the Astir peninsula, a wealthy area south of Athens.

Key Business Strategies

Diamantides has built his wealth through strategic fleet management and expansion. His companies, Delta Tankers and Marmaras Navigation, have grown to include a fleet of 56 tankers and bulk carriers. The family's business has focused on acquiring and operating vessels in the tanker and bulk carrier segments of the shipping industry. Diamantides' companies are known for their low-profile approach and methodical fleet management.

Philanthropy

Diamantis Diamantides is known for his discreet philanthropy, and supports education and science through the "Propontis" Foundation.

Career Milestones

1976

Founded Marmaras Navigation

Began his career in the shipping industry by acquiring his first vessel.

2006

Founded Delta Tankers

Established Delta Tankers, which owns and operates a fleet of tankers.

Philanthropy & Social Impact

Education and Science

Propontis Foundation

Undisclosed

Supports education and science.

Controversies & Challenges

2019

Brazil Oil Spill

Delta Tankers' vessel, Bouboulina, was investigated as a potential source of an oil spill off the coast of Brazil.

2022

Ukraine War Sponsor

Delta Tankers was included on Ukraine's International Sponsors of War list.

2024

Sounion Tanker Attack

The tanker Sounion, managed by Delta Tankers, was attacked by Houthi forces in August 2024.