VOO Breaks $1 Trillion, Becoming the First ETF to Hit the Milestone
The Vanguard S&P 500 ETF (VOO) made history on Tuesday, surpassing $1 trillion in assets under management — the first ETF ever to reach that towering mark. The milestone came as the fund pulled in roughly $1.7 billion in a single day, pushing it over the line.
VOO claimed the title of the world's largest ETF back in February 2025, overtaking the long-dominant SPDR S&P 500 ETF Trust (SPY). It hasn't slowed down since. So far this year, the fund has attracted about $69 billion in net inflows, more than any other ETF, while SPY has seen money head out the door. A roughly 11% rise in the S&P 500 this year has also lifted VOO's asset base.
The fund charges just 0.03% annually, matching the iShares Core S&P 500 ETF (IVV) and a third of SPY's 0.09% expense ratio. But rock-bottom fees alone don't explain VOO's lead — IVV, after all, charges the same and has been around longer. The real difference? Vanguard's brand. Built on the low-cost indexing philosophy of founder Jack Bogle, the firm continues to attract buy-and-hold investors who open Vanguard accounts, buy Vanguard funds, and rarely trade. That sticky investor base gives VOO a steady stream of organic growth that rivals struggle to replicate.
The $1 trillion club won't stay exclusive for long. SPY holds roughly $787 billion in assets, and IVV sits at $860 billion — both within striking distance of the milestone over time. But for now, VOO stands alone, a testament to the explosive growth of passive, low-cost investing.
Looking ahead, $2 trillion is the next obvious round number, though it will likely take years to reach. VOO's grip on the asset crown looks secure for the foreseeable future, though one fund worth watching is the SPDR Portfolio S&P 500 ETF (SPYM), which has pulled in $37 billion this year — second only to VOO. At about $150 billion in assets, it's still a fraction of VOO's size, but its ultra-low fee and rapid growth make it a long-term contender.
For the ETF industry, VOO's trillion-dollar milestone is more than just a number. It signals how far the product category has come from its niche beginnings, and how deeply passive indexing has embedded itself into the core of global investing. VOO may be the first, but it almost certainly won't be the last.