(Adds HarbourVest's response)
Oct 5 (Reuters) - Private equity firm SVG Capital Plc said on Wednesday it received a proposal from a consortium that included Goldman Sachs Group Inc and the Canadian Pension Plan Investment Board (CPPIB) to acquire its investment portfolio.
SVG, which is fending off a $1.35 billion bid from U.S. rival HarbourVest, said it was "urgently" evaluating the proposal.
The statement comes a day after SVG said it would sell half of its investment portfolio for 379 million pounds ($483 million) and wind down operations by the end of 2017.
SVG said winding down would be a better option for its shareholders, compared to accepting the HarbourVest offer.
The company's proposal to wind down was backed by Standard Life Investments, which holds a 2 percent stake.
Standard Life supported the SVG board's recommendation to maximise shareholder value by liquidating the portfolio in an orderly manner, a representative of the British insurer and asset manager said in an email on Wednesday.
Following SVG's statement, HarbourVest said late on Wednesday that Aviva Investors and Legal & General Investment Management, which together own about 7.3 percent of SVG's shares, had withdrawn their letters of intent to vote in favour of its offer.
The Boston-based PE firm said earlier in the day that its offer gave the British company's shareholders a "clean break", compared with the risks associated with winding down operations.
SVG also said on Tuesday it had in-principle agreed to sell half of its investment portfolio to Pomona Capital and Pantheon Ventures at a 7.8 percent discount.
If that sale goes through, shareholders should get 288 pence per share in November and another 192 pence per share early in 2017, Liberum analysts wrote in a note on Wednesday.
SVG's shares closed down 0.5 percent at 653.5 pence on the London Stock Exchange. ($1 = 0.7845 pounds) (Reporting by Noor Zainab Hussain and Mamidipudi Soumithri in Bengaluru; Editing by Amrutha Gayathri and Sriraj Kalluvila)