By Gwladys Fouche and Simon Jessop

OSLO/LONDON (Reuters) - Five years after first ditching some coal companies, Nordic investors are turning their focus to bigger carbon emitters in a range of industries, paving the way for other funds to follow.

Norway's sovereign wealth fund, managed by Norges Bank Investment Management (NBIM), last week excluded five companies, including Glencore <GLEN.L>, from its holdings after putting a hard limit on coal-related emissions.

Investors in the Nordic region have been among the vanguard of environmental, social and governance (ESG) investing, with Norway's NBIM grabbing most of the attention due to its size.

The $1 trillion fund this week also evicted four oil firms for "unacceptable" emissions, putting any laggards in sectors including cement and steel on notice.

Although some smaller funds have been more ambitious, NBIM was one of a small group of investors to exclude in 2015 all firms that derived more than 30% of revenues from thermal coal.

More than 50 investors have since introduced some form of revenue-based limit and, after several years of political debate in Norway, NBIM's rules are expected to bolster such efforts even if they are not uniformly adopted.

"You're never going to get a perfect metric for any of this stuff: different asset owners and different asset managers are going to be doing it differently," Mark Lewis at BNP Paribas Asset Management <BNPP.PA> said.

Norwegian pension fund KLP has already applied the new volume limits on coal, its head of responsible investments Jeanett Bergan told Reuters, adding it had been interested to see what criteria were used for "unacceptable" emissions.

"I understand it as them trying to say that 'if you are an outlier, who has way higher emissions than your peers, then we don't want to finance you'," she said.

DNB Asset Management <DNB.OL> said it had already moved to reflect the tighter rules. So did Norway's Storebrand Asset Management, although irrespective of NBIM's move.

"It was important for us to implement stricter criteria within climate mitigation as part of the climate strategy and also because NBIM is seen as best practice for manyinstitutional investors in Norway," Janicke Scheele, DNB's head of responsible investments, said.

"It is seen as the consensus for what the Norwegian people's expectations are."

Finnish pension fund Varma said it had already moved to tighten its climate policy in late 2019, aiming to be carbon neutral by 2035 and fully divested from some sectors such as oil exploration by 2030.