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Constantinos Martinos & family
Rank #1822
GREECE•Logistics•Shipping

Constantinos Martinos & family

Net Worth
$2.245B
0% (24h)
Constantinos Martinos, born in 1953, is a Greek billionaire and a prominent figure in the shipping industry. He is the owner of Thenamaris, a leading shipping firm, and is the patriarch of a family with a significant presence in global maritime trade. His career began in the mid-1960s when he began managing the family fleet, with his mother Athina Martinos, a pioneering shipowner, co-founding Thenamaris in 1972. With an estimated net worth of $2.2 billion as of March 2026, Martinos has built a substantial fortune through shipping. His leadership has been instrumental in Thenamaris' growth, currently managing a fleet of 87 vessels, including tankers, bulk carriers, and container ships. His commitment to corporate social responsibility is evident through various philanthropic initiatives. Martinos's achievements have solidified his legacy in the maritime sector.

How to read Constantinos Martinos & family's profile

Public net-worth figures are estimates. They combine observable inputs—typically listed equity, disclosed transactions, and market prices—with editorial judgment where filings are incomplete (for example, private holdings, debt, or cross-holdings). For Constantinos Martinos & family, we anchor the narrative to Shipping and Shipping, then update the headline number as markets move. The chart on this page is meant to show trajectory, not a certified balance sheet.

When you see $2.245B alongside global rank #1822, interpret it as our best synthesis of widely cited ownership and price signals—not a claim about cash on hand. Estimates can diverge from other publishers because of different treatment of options, trusts, charitable vehicles, or illiquid assets. We document the general approach in methodology and welcome corrections via corrections.

Country (GREECE) and career milestones on this page are curated for reader context; they should be verified against primary sources when used for research. Editorial metadata for this profile is refreshed on a rolling basis, with deeper audits at least annually (last noted cycle: 2026).

Looking for depth? When available, the dossier and timeline sections below add long-form context beyond the headline number—prioritize those modules when evaluating claims about strategy, controversies, or philanthropic commitments.

The Full Dossier

Early Life and Family

Constantinos "Dinos" Martinos was born in Glyfada, Athens, Greece, on January 28, 1953. He comes from the historic Martinos family, which has a rich legacy in Greek shipping. His mother, Athina Martinos (née Methenitis), was one of the first female shipowners in Greece, founding Thenamaris in 1971. This family background laid the foundation for his future in the shipping industry.

Rise to Success

Martinos began his involvement in the family shipping business in the mid-1960s, helping manage the family fleet. In 1972, he co-founded Thenamaris Ships Management with his mother and brothers, Athanasios and Andreas. Although his brothers later established their own ventures, Constantinos remained at the helm of Thenamaris, guiding its growth over the years.

Key Business Strategies

Under Constantinos Martinos's leadership, Thenamaris has become a prominent shipping firm. As of 2024, the company manages a fleet of 95 vessels, encompassing tankers, bulk carriers, LNG carriers, and container ships. This diversification reflects a strategic approach to navigating the complexities of the global shipping market. His strategic vision and commitment to excellence have been crucial to the company's success. His son, Nikolas Martinos, currently serves as CEO, ensuring the continuation of the family legacy.

Philanthropy

Constantinos Martinos is also known for his philanthropic activities. The family has supported various initiatives in healthcare, education, and maritime conservation. His contributions reflect a commitment to giving back to the community and nurturing future talent within the maritime industry. He is also noted for supporting the restoration of the Greek Orthodox Church of Saint George in Cairo, Egypt.

Career Timeline

2011

Recognized by Lloyd's List

Named number 67 in the Top 100 most influential people in the shipping industry.

1972

Cofounded Thenamaris Ships Management

Co-founded Thenamaris Ships Management with his mother and brothers.

Philanthropic Impact

HealthcareUndisclosed

Support for hospitals

Supported major hospitals such as Sotiria, Papageorgiou, and Attikon.

ReligiousUndisclosed

Restoration of Greek Orthodox Church

Supported the restoration of the Greek Orthodox Church of Saint George in Old Cairo, Egypt

Key Business Ventures & Holdings

CompanyStakeValue
Thenamaris——

Net Worth History

In-Depth Analysis

Early Life and Family

Constantinos "Dinos" Martinos was born in Glyfada, Athens, Greece, on January 28, 1953. He comes from the historic Martinos family, which has a rich legacy in Greek shipping. His mother, Athina Martinos (née Methenitis), was one of the first female shipowners in Greece, founding Thenamaris in 1971. This family background laid the foundation for his future in the shipping industry.

Rise to Success

Martinos began his involvement in the family shipping business in the mid-1960s, helping manage the family fleet. In 1972, he co-founded Thenamaris Ships Management with his mother and brothers, Athanasios and Andreas. Although his brothers later established their own ventures, Constantinos remained at the helm of Thenamaris, guiding its growth over the years.

Key Business Strategies

Under Constantinos Martinos's leadership, Thenamaris has become a prominent shipping firm. As of 2024, the company manages a fleet of 95 vessels, encompassing tankers, bulk carriers, LNG carriers, and container ships. This diversification reflects a strategic approach to navigating the complexities of the global shipping market. His strategic vision and commitment to excellence have been crucial to the company's success. His son, Nikolas Martinos, currently serves as CEO, ensuring the continuation of the family legacy.

Philanthropy

Constantinos Martinos is also known for his philanthropic activities. The family has supported various initiatives in healthcare, education, and maritime conservation. His contributions reflect a commitment to giving back to the community and nurturing future talent within the maritime industry. He is also noted for supporting the restoration of the Greek Orthodox Church of Saint George in Cairo, Egypt.

Data Sources & Methodology

Figures for Constantinos Martinos & family are synthesized from the sources below and cross-checked against our net worth methodology. Estimates may lag market moves; see corrections to report discrepancies.

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