Financial firms report major shareholding activities in British and international companies through Form 8.3 disclosures.

Several financial firms, including Invesco Ltd and The Vanguard Group, have reported their public dealings in various British and international companies through Form 8.3 disclosures. These filings detail significant shareholding activities and include companies such as Aviva PLC, Direct Line Insurance Group, and Qualcomm Inc. The forms are used to maintain transparency in stock market dealings.