Asset held in exchange-traded funds increased 10.6% in September.

According to monthly data collected by State Street Global Advisors, ETF assets increased to $885 billion in September. There were ETFs managed by 33 different companies as of Sept. 30.

The three largest ETF managers nationally, BlackRock, State Street and Vanguard, collectively accounted for 84% of the assets in the market, an increase of 0.1 percentage points from the end of last year.

State Street, which had $205.7 billion in ETF assets in 93 funds as of Sept. 30, saw its share decline 1% since the beginning of this year, while BlackRock, which had $411.98 billion, declined 1.4%. Vanguard’s market share has increased 2.5% as its assets have increased to $125.99 billion.

The top three ETFS in terms of assets for the month of September were the SPDR S&P 500 ($78.01 billion) the SPDR Gold Shares ($54.89 billion), and the iShares MSCI Emerging Markets ETF ($45.17 billion.)

State Street said that dividend investing has been a major theme for advisors and their clients. For example, the SPDR S&P Divident ETF attracted $3.5 billion in assets through the first nine month of the year with $2 billion in inflows.