Pfizer (Wuhan) Research & Development Co., Ltd. B14, Biolake 666 Gaoxin Ave., Eastlaske Hi-Tech Wuhan, HB 430205 China https://www.sec.gov/Archives/edgar/data/0000078003/000007800321000038/pfe-20201231.htm https://www.cboe.com.au/underlying-share/pfe https://www.sec.gov/Archives/edgar/data/1776985/000119312519241112/d635330dex1018.htm https://investors.pfizer.com/Investors/Financials/SEC-Filings/default.aspx https://investors.pfizer.com/Investors/Financials/Annual-Reports/default.aspx https://www.opensecrets.org/orgs/pfizer-inc/summary?id=D000000138