I already have three security account for each family member.
There is a concept of Family Wealth or Family Office. Where I monitor family level investment. Often one invests in name of family members for tax liability reduction purpose, In such scenario, monitoring investment at family level is imperative.
From this perspective, I was checking various options.
different use case which maybe relevant is that to have different taxonomies for one security. Just did that by “duplicating” the security and then renaming it and giving it different taxonomies. Using this in the UK for different taxable accounts (SIPP, ISA, Trading) that has the same security