6. Intangible Liabilities - Charter Agreements

Intangible Liabilities - Charter Agreements as of December 31, 2025, and 2024 consisted of the following:

Intangible Liabilities/ Assets - Charter Agreements - Schedule of Intangible Liabilities (Table)

Intangible liabilities are related to (a) acquisition of the four high-reefer ECO 9,019 TEU vessels delivered in December 2024 and January 2025, and (b) acquisition of the two new ECO 8,586 TEU Vessels delivered in December 2025, and (c) management’s estimate of the fair value of below-market charters on August 14, 2008, the date of the Marathon Merger. These intangible liabilities are being amortized over the remaining life of the relevant lease terms and the amortization income is included under the caption “Amortization of intangible liabilities-charter agreements” in the Consolidated Statements of Income.

Amortization income of intangible liabilities-charter agreements for the years ended December 31, 2025, 2024 and 2023 was $13,486, $5,526 and $8,080, respectively.

6. Intangible Liabilities - Charter Agreements (continued)

The aggregate amortization of the intangible liabilities in each of the 12-month periods up to December 31, 2030, is estimated to be as follows:

Intangible Liabilities/ Assets - Charter Agreements - Aggregate Amortization of Intangible Liabilities (Table)

The weighted average useful life for the remaining intangible liabilities-charter agreements terms is 4.21 years.