Samsung Heavy is finishing interior work on Samsung Electronics' P4 Phase 2 fab building in Pyeongtaek. On August 31 it revised the contract price to 639.9 billion won. The old price was 423.7 billion won. That is a 51% increase. Samsung Electronics is the customer. It is also a related company of Samsung Heavy, so this counts as a related-party contract. Work began in July 2023. The contract runs through the end of 2027. The filing says the end date can still move with construction progress. This is at least the fourth revision to a contract first disclosed in December 2023. The filing does not say why the scope or price grew.