There were hundreds of distinct exchange-traded funds available by the end of 2017. In case they were wondering who firms handle the most money internationally, here is a list of the top ten fund businesses in the world, ordered by total assets managed.
BlackRock
Vanguard
State Street Global Advisors
Invesco PowerShares
Charles Schwab
First Trust
WisdomTree
Guggenheim
VanEck
ProShares

Exchange-traded funds (ETFs) are primarily managed by large asset management firms that dominate the global market. The biggest ETF management companies include:

BlackRock (iShares) – The world’s largest ETF provider, with over $3 trillion in ETF assets under management (AUM), offering a wide range of index and thematic ETFs.

Vanguard – Known for low-cost index-tracking ETFs, managing around $2.5 trillion in ETF assets, popular among long-term investors.

State Street Global Advisors (SPDR ETFs) – A pioneer in ETFs, managing over $1 trillion, including the famous SPDR S&P 500 ETF (SPY).

Invesco – Offers $500+ billion in ETF AUM, including QQQ (Nasdaq-100 tracker) and smart-beta ETFs.

Charles Schwab – A major player with $300+ billion in ETF assets, known for commission-free trading.

These firms dominate the ETF industry, providing liquidity, diversification, and cost-efficient investment options for retail and institutional traders.