For two decades, BlackRock was the biggest name in ETFs. This week, Vanguard took the crown, and it won by being boring.
First, the basics. An ETF, or exchange-traded fund, is a basket of stocks you can buy like a single share.
Vanguard now runs about $4.39 trillion across its US ETFs. That total edged past the $4.36 trillion at BlackRock.
BlackRock had been number one since 2003, so the lead changed hands fast. A single day of $13 billion in new money was enough to push Vanguard on top.
Money has flowed its way all year long. Its funds have pulled in about $291 billion in 2026 so far, while BlackRock's took in closer to $120 billion.
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Vanguard's win came from doing less. It offers around 116 ETFs, mostly cheap index funds that track the whole market.
BlackRock offers more than 480 funds, which cover nearly everything under the sun. But Vanguard's no-frills style kept pulling in money year after year.
BlackRock's lead once topped 60% of the whole market. Vanguard chipped away at it for nearly 20 years.
A big reason is who buys each one. Vanguard leans on regular savers and their advisors, who tend to buy and hold through any market.
BlackRock leans more on big firms, whose money moves in and out faster. Steady cash from small savers is simply harder to scare off.
One product led the charge. Vanguard's S&P 500 ETF, called VOO, just hit $1 trillion on its own.
That made VOO the first ETF ever to reach that mark. It also shows how much weight one simple fund can carry.
The idea goes back to Vanguard's founder, Jack Bogle. He built the firm more than 50 years ago on cheap funds that track the market.
The funny part is that Bogle once mocked ETFs as a tool for the "lunatic fringe." His firm ended up ruling the very market he doubted.
Size is not everything here. BlackRock still makes far more money from its funds.
That gap comes down to price, since BlackRock charges about four times as much. Its average fee is 16 cents per $100 invested, against just 4 cents at Vanguard.
Cheap funds are like a grocery store with thin prices and big crowds. There is less profit per item, but a lot more carts rolling through.
The gap between the two is thin, only about $30 billion. A single busy week could swing the lead right back.
Either way, the money keeps flowing toward the lowest fees. For now, the cheapest funds in the business are also the biggest.
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