North Antrim DUP MP Ian Paisley and the South Antrim Ulster Unionist MP Danny Kinahan have declared receiving hospitality from tobacco firm JTI Gallaher.
The MPs got the tickets to the England v Australia Rugby World Cup match on October 3. They estimated the value of the tickets and dinner to be £1,650 each.
In January, the company confirmed they would close their Ballymena plant in 2017 with the loss of 870 jobs.
Mr Paisley said the firm remains a major employer in his constituency and that he was asked him to attend by JTI's management.
Mr Kinahan told the BBC: "Many of my constituents are impacted by closures in North Antrim. I will continue to take any opportunity to discuss options that may help generate employment for South Antrim and Northern Ireland."
The register of MPs' financial interests can be viewed here (PDF).
SDLP MP Mark Durkan registered travel and accommodation for a trip to Cuba worth £2,400. Mr Dukhan was visiting the Caribbean island to meet Colombian peace negotiators.