The fund managers or their distributors report daily NAV prices and dividends through an automatic email solution.
The fund information is distributed through the Oslo Børs Mutual Fund Feed (OMFF) with added value; such as return and risk calculations. The Norwegian Mutual Funds Association approves the methods of calculation.
This is how you register mutual funds on Oslo Børs:
Sign the Mutual Fund Reporting Agreement
Register your mutual funds
Report daily NAV prices