This ETF Tracking The S&P 500 Just Crossed $1 Trillion In Assets And It's Not The SPY

• Vanguard’s S&P 500 ETF (VOO) became the first exchange-traded fund in history to reach $1 trillion in assets under management following a $1.7 billion daily cash injection. 
• VOO has pulled in $69 billion in net inflows since the start of 2026. 
• VOO has an ultra-low 0.03% fee.

The Vanguard S&P 500 ETF (VOO) has become the first exchange-traded fund in history to cross $1 trillion in assets under management, marking a major milestone for the passive investing industry, Bloomberg News reported Wednesday.

The fund, known by its ticker symbol VOO, crossed the historic threshold after pulling in $1.7 billion in investor inflows during its most recent trading session, according to data compiled by Bloomberg.

Already the world’s largest exchange-traded fund, VOO now stands alone in the trillion-dollar category for ETFs. Only a rare handful of traditional, open-ended mutual funds globally have ever amassed a similar volume of capital. VOO dethroned SPY last year to be the top ETF tracking the S&P 500.

The milestone caps an extended period of aggressive growth for Malvern, Pennsylvania-based Vanguard Group’s flagship equity product. VOO has been the top recipient of investor cash across the entire ETF landscape in 2026, pulling in more than $69 billion in net inflows since the start of the year.

That momentum builds on a record-breaking performance last year, when the fund expanded its asset base by roughly $250 billion. The rapid accumulation of assets allowed VOO to overtake its long-time rival, the SPDR S&P 500 ETF Trust (SPY), as the largest fund in the ecosystem.

Market appreciation has also heavily fueled the fund's climb. The S&P 500 index, which VOO tracks, has gained roughly 11% since the beginning of the year, repeatedly setting fresh all-time record highs.

Driving Passive Investing 

The $1 trillion milestone highlights a broader, multi-decade structural shift on Wall Street away from active stock-pickers and toward low-cost, automated indexing strategies. Since the inception of the ETF vehicle in the early 1990s, the products have exploded in popularity among both retail savers and major institutional money managers due to their low fees, tax advantages, and high intraday liquidity. VOO features a rock-bottom expense ratio of 0.03%.

Because VOO is market-capitalization weighted, its explosive asset growth has concentrated heavily in America's largest corporate giants. Its top holdings are dominated by mega-cap technology firms, led by Nvidia Corp., Apple Inc., and Microsoft Corp.

VOO Retail View

Retail sentiment on Stocktwits was “normal” with “normal” message volumes. 

VOO has gained nearly 10% year-to-date. 

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