What Is the SPY? SPDR S&P 500 ETF Trust Holdings and Overview
SPY is the SPDR S&P 500 ETF Trust the first U.S. ETF launched in 1993 that tracks the S&P 500 index with NVIDIA at 7.89% as the top holding and $791 billion AUM as of June 18 2026
Updated June 2026Expert ReviewedInvestSnips Data
505Total Holdings
$791 BillionAssets Under Management
0.09%Expense Ratio
January 22 1993Inception Date
For informational purposes only. Not investment advice. Data from public ETF filings updated regularly.
SPY is the ticker symbol for the SPDR S&P 500 ETF Trust the first U.S.-listed ETF that tracks the performance of the S&P 500 index by holding a portfolio designed to mirror its 505 large-cap U.S. companies.
As a Unit Investment Trust with massive daily liquidity exceeding most stocks SPY offers institutional-grade trading efficiency and serves as the primary benchmark for U.S. large-cap performance but its 1993-era structure creates differences from modern open-ended ETFs like VOO particularly around dividend handling and securities lending.
Key Facts
What You Need to Know
01The Original U.S. ETF Pioneer
SPY launched on January 22 1993 as the first U.S.-listed ETF revolutionizing investing by allowing investors to buy or sell the entire S&P 500 in a single liquid security. Its massive daily trading volume and tight spreads make it the go-to instrument for institutions and options traders. This liquidity advantage often outweighs its slightly higher 0.09% expense ratio for short-term or high-volume users even as newer ETFs like VOO offer lower costs for long-term holders.
02Unit Investment Trust Structure
SPY is structured as a Unit Investment Trust rather than a modern open-ended ETF which legally restricts it from reinvesting dividends immediately and from securities lending. This creates cash drag and prevents extra income that competitors use to offset fees resulting in a modestly lower effective yield. The rigid 1993 framework also includes a termination date in 2118 but provides rock-solid tracking to the S&P 500 with minimal deviation making it a reliable benchmark despite these operational limitations.
03Unmatched Liquidity King
SPY consistently ranks among the most traded securities globally with average daily volume in the tens of billions of dollars far surpassing most individual stocks and many other ETFs. This liquidity translates to penny-wide spreads and efficient execution even for large institutional orders. For traders and options market makers this advantage can save far more than the 0.06% expense ratio difference versus VOO. The high volume reinforces its role as the primary S&P 500 trading vehicle worldwide.
04Quarterly Rebalancing to Match the Index
SPY rebalances quarterly in line with S&P 500 adjustments typically effective after the third Friday of March June September and December. This keeps its 505 holdings aligned with the benchmark while minimizing unnecessary turnover and tracking error. Individual weights fluctuate daily with market prices but the fund makes precise adjustments only at these scheduled events. The process ensures investors receive authentic S&P 500 exposure with the efficiency that has made SPY a foundational tool for both retail and professional portfolios since 1993.
Portfolio
What Is the SPY? SPDR S&P 500 ETF Trust Holdings and Overview — Top Holdings
Click any column to sort. Holdings and weights updated June 2026.
#
Company
Ticker
Weight %
Sector
1
NVIDIA Corp
NVDA
7.89%
Information Technology
2
Apple Inc.
AAPL
7.05%
Information Technology
3
Microsoft Corp
MSFT
5.14%
Information Technology
4
Amazon.com Inc
AMZN
4.07%
Consumer Discretionary
5
Alphabet Inc. Class A
GOOGL
3.41%
Communication Services
6
Broadcom Inc
AVGO
3.26%
Information Technology
7
Alphabet Inc. Class C
GOOG
2.71%
Communication Services
8
Meta Platforms Inc
META
2.13%
Communication Services
9
Tesla Inc
TSLA
1.88%
Consumer Discretionary
10
Micron Technology Inc
MU
1.68%
Information Technology
Source: ETF issuer public filings. Weights approximate and subject to change.
Allocation
Sector Breakdown
Sector
Weight %
Information Technology
38.01%
Financials
11.75%
Communication Services
10.11%
Consumer Discretionary
9.40%
Industrials
8.58%
Health Care
8.51%
Consumer Staples
4.70%
Energy
3.09%
Utilities
2.13%
Materials
1.89%
Real Estate
1.85%
Common Questions
Frequently Asked Questions
SPY stands for SPDR S&P 500 ETF Trust where SPDR refers to Standard & Poor’s Depositary Receipts the original branding when it launched as the first U.S. ETF in 1993. The fund is designed to track the S&P 500 index by holding a representative portfolio of its 505 large U.S. companies. This structure allows investors to gain exposure to the broad U.S. large-cap market in a single liquid security that trades like a stock throughout the day. The name has become synonymous with S&P 500 performance making SPY the benchmark against which other large-cap funds are measured. Its ticker is now one of the most recognized in global finance due to its pioneering role and unmatched liquidity.
SPY is the SPDR S&P 500 ETF Trust an exchange-traded fund that seeks to replicate the performance of the S&P 500 index by holding approximately 505 large U.S. companies in proportion to their market capitalization. Launched in 1993 it was the first U.S. ETF and remains one of the largest and most liquid with roughly $791 billion in assets. The fund trades on exchanges like a stock allowing intraday buying and selling while providing broad market exposure at a 0.09% expense ratio. Its Unit Investment Trust structure distinguishes it from newer open-ended ETFs but delivers tight tracking and serves as the primary vehicle for institutional hedging and retail core holdings.
SPY works by holding a portfolio of stocks that mirrors the S&P 500 index and issues creation units to authorized participants who exchange baskets of the underlying securities for ETF shares keeping the price closely aligned with net asset value. It rebalances quarterly to match index changes and distributes dividends quarterly after holding received cash due to its UIT structure. This mechanism combined with high trading volume ensures tight premiums or discounts to NAV and exceptional liquidity. Investors buy and sell shares throughout the day like any stock benefiting from the fund’s low tracking error. The process has made SPY a cornerstone of modern investing since its 1993 inception.
SPY and VOO both track the S&P 500 but SPY is a Unit Investment Trust with a 0.09% expense ratio and cash drag on dividends while VOO is an open-ended ETF with a lower 0.03% expense ratio and immediate dividend reinvestment. SPY offers superior liquidity and tighter spreads ideal for traders and institutions while VOO provides slight performance advantages for long-term buy-and-hold investors due to lower costs and better dividend handling. Both deliver nearly identical S&P 500 exposure but the choice depends on time horizon trading needs and account type. SPY remains the volume leader while VOO often edges out on net returns over multi-year periods.
SPY is a strong investment for investors seeking efficient exposure to the S&P 500 with unmatched liquidity and tight tracking since its 1993 inception. Its 0.09% expense ratio while higher than VOO is still very low and the massive daily volume benefits active traders and options users. The fund has delivered solid long-term returns reflecting U.S. large-cap growth but carries full market risk with historical drawdowns. For buy-and-hold investors VOO or similar alternatives may be preferable due to lower costs but SPY excels for tactical allocation hedging and high-volume trading. Its pioneering structure and liquidity make it a reliable core holding when used appropriately within a diversified portfolio.
The top holdings in SPY as of June 18 2026 are NVIDIA at 7.89% Apple at 7.05% Microsoft at 5.14% Amazon at 4.07% and Alphabet Class A at 3.41%. These mega-cap names dominate due to market-cap weighting and drive a large portion of the fund’s performance. The concentration in technology and growth stocks reflects the current S&P 500 composition with Information Technology at 38.01%. While this has fueled strong returns it also increases sensitivity to a small group of companies. Investors benefit from exposure to market leaders but should monitor concentration levels when using SPY as a core position.
SPY has an expense ratio of 0.09% which equals $9 per year on a $10,000 investment. This is higher than VOO or IVV at 0.03% primarily due to its Unit Investment Trust structure that limits securities lending and dividend reinvestment. For high-volume traders the superior liquidity and tight spreads often more than offset the extra cost. Over long periods the difference can impact net returns but SPY’s massive scale and liquidity keep it highly competitive. The fee has remained stable making SPY a cost-efficient vehicle for its primary use cases in trading and institutional hedging.
SPY was created and launched on January 22 1993 as the first U.S.-listed exchange-traded fund revolutionizing access to the S&P 500 by allowing investors to trade the index like a single stock. This pioneering structure laid the foundation for the entire ETF industry which has since grown to trillions in assets. Its Unit Investment Trust design was innovative at the time but carries legacy limitations compared to modern open-ended ETFs. The longevity and success of SPY demonstrate the enduring power of low-cost broad market exposure with its liquidity and tracking efficiency remaining unmatched for many use cases even decades later.
Last updated June 2026 · InvestSnips Editorial · Data from public ETF filings
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