Grab Holdings, the Southeast Asian ride-hailing and delivery giant, has attracted backing from T. Rowe Price Group and Temasek Holdings for its planned merger with a blank-check company, people with knowledge of the matter said.

The firms have expressed interest in joining a private investment in public equity offering, or PIPE, to support Grab’s combination with Altimeter Growth Corp, the people said, asking not to be identified because the talks are private. BlackRock is also in talks to participate in the PIPE, which could raise about US$4 billion ($5.36 billion), according to the people.

Singapore-based Grab aims to announce the SPAC merger as soon as next week, the people said. The deal could value Grab at more than US$34 billion, the people said.

The Grab deal could become the biggest SPAC merger ever, according to data compiled by Bloomberg, and would see the startup become one of the first Southeast Asian unicorns to go public through a blank-check company. Indonesia’s Traveloka is in advanced talks to list via Bridgetown Holdings Ltd., a SPAC backed by billionaires Peter Thiel and Richard Li, Bloomberg News has reported.

The terms being discussed would give Grab an enterprise value equivalent to roughly 8.5 times its revenue, the people said. Details of the transaction are still being finalized, and the investor lineup could change, the people said.

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Representatives for Grab, T. Rowe Price and Temasek declined to comment. A spokesperson for BlackRock couldn’t immediately comment, while a representative for Altimeter didn’t immediately respond to requests for comment.

Grab, backed by SoftBank Group Corp, increased net revenue by about 70% in 2020 after bouncing back from a Covid-19 trough. The startup was last valued at about US$16 billion, a person with knowledge of the matter said. It’s now angling to delve deeper into online finance and food delivery.

Altimeter Growth Corp, sponsored by Silicon Valley investment firm Altimeter Capital, raised US$500 million in its September initial public offering. The SPAC said in its prospectus that it plans to acquire a business in the technology sector that “will compound growth over the long-term for exponential value creation.”