The Marinkais family has taken another large piece of Capital Product Partners (CPLP), boosting its stake in the diversified owner to almost $45m.

Evangelos Marinakis, chairman of CPLP backer Capital Maritime, and his family advanced their interest in the owner of 15 boxships, one capesize bulker and three LNG carriers by $6.16m by purchasing 469,172 more common units, according to a regulatory filing.

The stock, which trades on the Nasdaq stock exchange under the ticker symbol CPLP, gained 1.6% on Monday to close at $13.13.

At that price, the family's stake in the company stood at $44.2m, or 17.4%, under the name Capital Maritime & Trading Corp.

The family holds the largest position in CPLP, followed by Donald Smith & Co, which owns 1.45m shares.

CPLP last week followed boxship owner Costamare to the Greek bond market with the aim to raise up to €150m ($173m).

Costamare in May tapped the market for $112m in unsecured five-year bonds.

CPLP is selling the bonds to expand into the gas sector with three LNG newbuildings owned by Marinakis-backed Capital Gas.

CPLP plans to put the money from the bond sale toward purchasing 174,000-cbm vessels Attalos, Adamastos and Asklipios (all built 2021)

All three vessels are due for delivery by the end of the year and have secured multi-year employment deals.