Swiss private equity firm Partners Group (<a href="https://www.six-group.com/en/products-services/the-swiss-stock-exchange/market-data/shares/share-explorer/share-details.CH0024608827CHF4.html#/" target="_blank">SWX:PGHN</a>) is weighing up an exit from three of its portfolio companies -- German wind and solar energy developer VSB Group, Northern European green energy company Gren and Norwegian natural-gas transport company CapeOmega, Bloomberg reported citing sources in the know.