HELSINKI, Oct 22 (Reuters) - Finnish biofuel producer and oil refiner Neste reported a smaller-than-expected fall in its third-quarter profit on Thursday, thanks to its resilient renewables business and despite a very weak refining market.

Neste, which has invested heavily in renewables, said its July-September comparable operating profit fell to 373 million euros ($442 million), beating the 343.5 million expected on average by analysts, Refinitiv Eikon data showed.

Neste's board also decided to pay a second dividend instalment of 0.56 euros per share, consisting of an ordinary dividend of 0.46 euros per share and an extraordinary dividend of 0.10 euros per share.

($1 = 0.8440 euros) (Reporting by Anne Kauranen; Editing by Mark Potter)