Apollo Global Management, Star NCLC Holdings (Genting Hong Kong) and TPG Global Funds are the sellers.
The offering, underwritten by Goldman, Sachs, is expected to close on or about Aug. 13.
Following the offering, the three companies will hold approximately 32.8% of NCLH's outstanding shares. Apollo's stake would go to 17.1% from 20.6%, Genting HK's to 13.3% from 17.7% and TPG's to 2.3% from 3.2%.
NCLH shares closed Monday at $61.42, up 36 cents.