Multiple web search results reference the Office for Attracting Strategic Enterprises (OASES) welcoming a new batch of strategic enterprises to set up or expand in Hong Kong, mentioning Pfizer and Amgen in the context of such announcements. While the exact figure of '22' and the specific valuation of 'HK$1 trillion' are not consistently corroborated across the provided snippets, the core claim that Pfizer and Amgen are among strategic enterprises planning expansion in Hong Kong is supported by the context of the search results.

Two separate web search results describe Pfizer as a leading global research-based pharmaceutical and biotechnology company. One states it is an 'American multinational pharmaceutical and biotechnology corporation' and another describes it as 'one of the world’s largest research-based pharmaceutical and biomedical companies.'

Two separate web search results support the claim that Amgen is a major biotechnology company. One states it is 'one of the world's largest independent biotechnology companies,' and another describes it as an 'American multinational biopharmaceutical company.'

Multiple web search results consistently state that Amgen was founded in 1980 and that its headquarters is in California (specifically mentioning Thousand Oaks).

Two web search results provide specific market capitalization figures for Amgen around April 2026: one states 'As of April 2026 Amgen has a market cap of HK$1.512 Trillion,' and another mentions a market cap of $191.97 billion as of April 17, 2026. This consistency across multiple sources regarding the timeframe and high valuation supports the claim.