Investment holding companies are entities that hold assets such as shares and bonds for investment purposes. Understanding major players in this field can help guide investment decisions. After analyzing available public information, several key points emerge:

Many large conglomerates have investment arms
Major corporations like Berkshire Hathaway, Softbank Group, and others have established investment divisions. These arms may hold shares in other companies for strategic and financial reasons. Knowing their holdings can signal promising investment opportunities.
Sovereign wealth funds are major investors
Government-owned investment funds like those in Norway and Singapore command vast capital. Monitoring their equity purchases may highlight productive companies or sectors.
Venture capital and private equity firms target certain industries
VC and PE companies often specialize in areas like tech, biotech, or energy. Following their lead can uncover emerging leaders in key fields.
Offshore entities offer tax advantages but lack transparency
Some investment vehicles are structured overseas for tax optimization, making their activities and controllers difficult to determine.
In summary, tracking moves by large corporations, sovereign funds, VC/PE firms, and offshore entities with investment divisions can provide useful signals when researching potential investments.