AMSTERDAM, May 13 (Reuters) - The Dutch government said on Friday it would pursue a stock market listing for insurer ASR (IPO-ASRN.AS), probably launching an initial public offering of shares before the end of this quarter.

ASR's book value at the end of 2015 was 3.57 billion euros ($4.06 billion).

Size and pricing have not been determined and will depend on market conditions, ASR and NL Financial Investments, the agency that oversees it, said in a joint statement.

ASR, the insurance operations of the former Belgian company Fortis, was nationalised by the Dutch state together with ABN Amro during the 2008 financial crisis. ($1=0.8791 euros) (Reporting by Toby Sterling; Editing by Clarence Fernandez)