Vanguard’s S&P 500 ETF (VOO) became the first exchange-traded fund in history to cross $1 trillion in assets, reaching the milestone on June 2, 2026, according to Vanguard and multiple financial institutions.
The achievement marks a watershed moment for the ETF industry and underscores VOO’s dominance in passive investing. The fund has grown from less than $200 billion in assets in the early 2020s to become the world’s largest ETF by a significant margin, surpassing competitors like SPY and IVV.
VOO’s rapid ascent has been fueled by its ultra-low expense ratio of 0.03%, which is one-third the cost of SPY’s 0.09% annual fee, according to Benzinga. For a $1 million investment, this cost difference amounts to $300 versus $945 annually, a savings that compounds significantly over decades.
The fund attracted more than $69 billion in net inflows during 2026 through early June, leading all ETFs by a wide margin, according to Crypto Briefing. This steady stream of investor money, combined with strong performance in the S&P 500—particularly gains driven by mega-cap technology and artificial intelligence stocks—has propelled VOO’s growth.
VOO invests in all 500 companies in the S&P 500 Index, representing the largest U.S. corporations. Launched in 2010, the fund employs a passive indexing strategy that tracks the index’s performance. Its appeal lies in its simplicity: investors gain diversified exposure to America’s largest companies at minimal cost, making it popular with both individual savers and institutional investors.
The second and third largest S&P 500 ETFs remain far behind. SPY, the SPDR S&P 500 ETF managed by State Street, holds approximately $787 billion in assets, while BlackRock’s iShares Core S&P 500 ETF (IVV) commands about $860 billion, according to ETF.com. Neither has approached the trillion-dollar mark.
VOO’s milestone reflects a broader shift in the asset management industry toward low-cost index funds. The fund has consistently attracted record inflows year after year, with 2025 marking over $116 billion in annual inflows, according to ETF Database. This momentum has accelerated in 2026, underscoring investor preference for cost-efficient, diversified exposure to the U.S. stock market.
Sources
- Morningstar — confirmed VOO reached $1 trillion on June 2, 2026
- Yahoo Finance — reported the milestone and Vanguard’s confirmation
- Reuters — documented VOO as the first ETF to top $1 trillion
- Bloomberg — reported the $1.7 billion inflow that pushed VOO over the threshold
- Benzinga — detailed expense ratio comparison between VOO (0.03%) and SPY (0.09%)
- Crypto Briefing — reported $69 billion in 2026 inflows through early June
- ETF.com — provided asset figures for SPY ($787 billion) and IVV ($860 billion)
- ETF Database — documented 2025 annual inflows of $116 billion
