ZURICH, March 27 (Reuters) - UBS has sealed the sale of Credit Suisse's securitised products business to Apollo Global Management as part of efforts to shed non-core assets after its takeover of the collapsed banking group.

Apollo will purchase $8 billion of "senior secured financing facilities", UBS said on Wednesday, adding that it expects to make a net gain of about $300 million from the deal in the first quarter of 2024.

"This mutually beneficial agreement aligns with UBS's strategy of winding down and simplifying its non-core and legacy portfolio," UBS said in a statement.

UBS Chief Executive Sergio Ermotti said the deal would free up capital from non-core activities and reduce costs and complexity in its business.

Credit Suisse had to be rescued in March last year in a government-sponsored operation.

Luzerner Kantonalbank analyst Daniel Bosshard said the Apollo deal was a sign that the Credit Suisse integration was going better than expected.

"The early praise is now very high, which is reflected in a sharp rise in the share price in recent months," Bosshard said.

"This leaves little room for disappointment."

UBS shares are up about 8% so far this year. They were down about 0.46% in early trading in Zurich on Wednesday.

In 2022, Credit Suisse had already begun the process of winding down its business of securitising products such as mortgages.

Under that plan, about $20 billion of remaining assets were to stay on the books of Credit Suisse but be managed by Apollo.

UBS will retain what is not being transferred to Apollo, a spokesperson for the bank said. The value of the former assets remaining with UBS was not immediately clear.

(Reporting by Oliver Hirt, Noele Illien and Gdansk Newsroom Writing by Dave Graham Editing by David Goodman and Jane Merriman)