company funeral
A funeral organized and paid for by a company, typically for a founder, executive, or employee who died in service.
The founder's company funeral was held at a hotel in Tokyo.
A company funeral was held for the chairman last week.
Many business partners attended the company funeral.
葬式 is the everyday, common word for a funeral in general, whereas 社葬 refers specifically to a corporate-sponsored funeral.
密葬 is a small, private funeral for family only, in contrast to 社葬, which is a large, public funeral organized by a company.
company funeral
Compound of 社 (company) and 葬 (funeral).