
Top 10 Small-Cap ETFs
Risk level: 🟡 Moderate to high: Small-cap ETFs can swing more than large-cap or total-market funds, but they also offer higher long-term growth potential for investors with time on their side.
At a Glance
- What this list covers: U.S.-listed small-cap ETFs that provide diversified exposure to smaller domestic companies, ranked by assets under management (AUM) to emphasize liquidity, scale, and real-world investor adoption.
- How funds are grouped: ETFs are labeled Core, Balanced, or High-Risk based on diversification, index methodology, and expected volatility, making it easier to match each fund to different risk tolerances.
- Who this is for: Investors looking to add long-term growth potential to a portfolio, either as a dedicated small-cap allocation or alongside broader holdings like total market, growth, or value ETFs.
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Why Small-Cap ETFs Belong in Every Investor’s Portfolio
Small-cap ETFs give you exposure to U.S. companies that are earlier in their growth cycle and often more sensitive to economic expansion. Over long periods, small-cap stocks have historically delivered higher returns than large-caps, although with greater volatility along the way. Using ETFs instead of individual stocks spreads that risk across hundreds of companies, making small-cap investing more practical and easier to manage. Investors often combine small-cap ETFs with large-cap or sector-focused strategies like Top 10 Growth ETFs or Top 10 Dividend ETFs to create a more balanced allocation. For readers who prefer picking individual companies instead of funds, see Top 10 Small-Cap Stocks for a stock-based approach to the same theme.
The Top 10 Small-Cap ETFs for 2026
Updated: January 05, 2026
Color labels indicate investor fit. Core funds represent the broadest and most diversified U.S. small-cap ETFs, offering exposure to hundreds of smaller domestic companies across many sectors with long-term growth potential. Balanced funds introduce value, quality, or active tilts that can improve returns over full market cycles but may result in more noticeable performance swings. High-risk funds rely on narrower factor strategies or unconventional weighting methods, which can lead to sharper volatility and periods of underperformance. This list includes only non-leveraged, liquid small-cap ETFs with transparent methodologies and meaningful scale. All funds are ranked by assets under management (AUM) at the time of publication. Investors should review each fund’s risks, consider their personal goals, and consult a qualified professional before making investment decisions.
iShares Core S&P Small-Cap ETF (IJR) is designed to give investors straightforward exposure to profitable U.S. small-cap companies without adding complexity or speculative filters. The fund tracks the S&P SmallCap 600 Index, which is widely viewed as a higher-quality benchmark than broader small-cap indexes because it requires companies to meet basic profitability criteria. This helps filter out weaker businesses while still capturing the long-term growth potential that small-cap stocks can offer.
IJR is often used as a foundational small-cap allocation because it balances diversification with discipline. Instead of chasing themes or factors, it provides broad exposure across hundreds of small-cap companies spread across industries like industrials, financials, technology, and healthcare. For investors building a long-term portfolio, this makes IJR a practical way to add small-cap exposure without introducing unnecessary risk or volatility spikes.

iShares Russell 2000 ETF (IWM) is the most widely recognized way to track the performance of U.S. small-cap stocks. The fund follows the Russell 2000 Index, which captures a broad cross-section of smaller publicly traded U.S. companies across virtually every industry. For many investors, IWM serves as the default reference point for how small-cap stocks are performing at any given time.
What distinguishes IWM is its sheer breadth and liquidity. With nearly two thousand holdings, the fund offers exposure to the full small-cap landscape, including early-stage growth companies, cyclical businesses, and firms still working toward consistent profitability. This makes IWM a useful tool not just for long-term allocation, but also for tactical positioning when investors want broad small-cap exposure without making sector or factor bets.

Vanguard Small-Cap ETF (VB) offers broad exposure to the U.S. small-cap market using Vanguard’s CRSP-based index methodology. The fund tracks the CRSP US Small Cap Index, which includes a wide range of profitable and developing companies that sit below the large-cap threshold. This approach emphasizes completeness and diversification rather than narrow definitions or aggressive screening.
VB is often favored by long-term investors who want small-cap exposure that blends seamlessly with a total-market or core equity allocation. The fund holds more than a thousand stocks and spreads exposure evenly across sectors such as financials, technology, industrials, and healthcare. Compared with narrower benchmarks, VB provides a smoother representation of the small-cap universe with less index turnover.

Vanguard Small-Cap Value ETF (VBR) targets U.S. small-cap companies that trade at lower valuations relative to fundamentals such as earnings and book value. The fund tracks the CRSP U.S. Small Cap Value Index, which applies a systematic value screen across the small-cap universe while maintaining broad diversification. This approach favors established, cash-generating businesses over higher-priced growth names.
VBR appeals to investors who want small-cap exposure with a valuation cushion. Compared with blended small-cap ETFs, it leans more heavily toward financials, industrials, and traditional value-oriented sectors. This tilt can lead to periods of underperformance during growth-driven markets, but it has historically helped during value rotations and economic recoveries.

Avantis U.S. Small Cap Value ETF (AVUV) takes a more active, research-driven approach to small-cap value investing. Instead of tracking a traditional index, the fund uses a systematic active process that emphasizes valuation, profitability, and business quality when selecting stocks. The result is a portfolio that looks very different from standard small-cap benchmarks while remaining broadly diversified.
AVUV is designed for investors who believe simple value screens are not enough. The fund intentionally tilts toward companies with stronger fundamentals and avoids the lowest-quality names that often dominate traditional small-cap value indexes. This can lead to higher tracking error versus benchmarks like the Russell 2000 Value Index, but it also gives the fund more flexibility to adapt as company fundamentals change.

SPDR Portfolio S&P 600 Small Cap ETF (SPSM) provides low-cost exposure to U.S. small-cap companies through the S&P SmallCap 600 Index. Like other S&P 600-based funds, it benefits from the index’s built-in profitability screen, which helps exclude the weakest companies from the small-cap universe. This makes SPSM appealing to investors who want quality-tilted small-cap exposure without active management.
SPSM is designed to be a practical, efficient building block rather than a headline product. It tracks the same underlying index as higher-profile S&P 600 ETFs but does so with an emphasis on cost efficiency. With hundreds of holdings across sectors such as financials, industrials, technology, and healthcare, the fund delivers diversified small-cap exposure while keeping expenses extremely low.

Dimensional U.S. Small Cap ETF (DFAS) applies Dimensional’s long-standing research-driven approach to the U.S. small-cap market. Unlike traditional index funds, DFAS uses an active, rules-based process that emphasizes fundamentals such as profitability, relative valuation, and market capitalization when constructing the portfolio. The result is a small-cap fund that intentionally deviates from standard benchmarks while remaining broadly diversified.
DFAS is built for investors who want more than simple market-cap weighting. The fund dynamically adjusts holdings based on changing fundamentals, which can help avoid persistently unprofitable or structurally weak companies. While this approach can lead to tracking error versus widely followed indexes like the Russell 2000, it also reflects a deliberate attempt to improve long-term risk-adjusted returns.

Vanguard S&P Small-Cap 600 ETF (VIOO) offers exposure to U.S. small-cap companies through the S&P SmallCap 600 Index using Vanguard’s implementation. Like other S&P 600-based funds, VIOO benefits from the index’s profitability requirement, which helps screen out weaker businesses that often weigh on broader small-cap benchmarks. This makes the fund appealing to investors who want small-cap exposure with a built-in quality filter.
VIOO tends to attract investors who prefer Vanguard’s structure and trading approach over competing S&P 600 products. While it tracks the same underlying index as some peers, differences in cost, liquidity, and fund size can matter depending on portfolio construction. VIOO remains diversified across hundreds of holdings and maintains balanced exposure across key small-cap sectors such as financials, industrials, technology, and healthcare.

Invesco S&P SmallCap 600 Revenue ETF (RWJ) takes an unconventional approach to small-cap investing by weighting companies based on revenue rather than market capitalization. Instead of allocating more weight to higher-priced stocks, the fund emphasizes companies that generate more sales, which often results in heavier exposure to cyclical and economically sensitive businesses. This design can lead to performance that diverges sharply from traditional small-cap benchmarks.
RWJ appeals to investors who want factor-driven exposure rather than plain market beta. By focusing on revenue, the fund often tilts toward companies with larger operating footprints but lower valuations, particularly in sectors like retail, industrials, and financials. That same structure can amplify volatility during downturns, making RWJ better suited as a tactical or satellite position rather than a core holding.

Invesco S&P SmallCap Value with Momentum ETF (XSVM) combines two aggressive factor tilts inside the U.S. small-cap universe: value and momentum. The fund tracks the S&P SmallCap 600 High Momentum Value Index, which selects small-cap stocks that score highly on both valuation and recent price momentum. This dual-factor approach creates a concentrated portfolio that can behave very differently from traditional small-cap ETFs.
XSVM is designed for investors who want amplified exposure rather than broad market representation. With a relatively small number of holdings, the fund makes strong bets on stocks that are both cheap and trending upward. That structure can lead to sharp gains during favorable market conditions, but it also increases volatility and drawdown risk when momentum reverses.

5 quick questions • 60 seconds
How to Use This List
Build your allocation: Use Core small-cap ETFs as the foundation of your small-cap exposure, then layer Balanced or High-Risk funds only if you understand the added volatility.
Balance with other styles: Small-caps tend to perform differently than mega-cap technology or income strategies. Pairing them with funds from Top 10 Tech ETFs or Top 10 REIT ETFs can smooth performance across market cycles.
Size your position carefully: Many investors limit small-cap ETFs to a portion of their equity allocation rather than making them the core of the entire portfolio.
Read the key numbers: Compare expense ratio, 3 and 5 year returns, volatility and standard deviation, maximum drawdown, tracking error, AUM, average volume, bid ask spread, index methodology, and sector weights.
Revisit periodically: Small-caps can outperform or lag for long stretches. Reviewing your allocation alongside lists like Top 10 Financial ETFs or Top 10 Energy ETFs helps keep risk in check.
How We Chose These ETFs
To identify the top small-cap ETFs for 2025, we analyzed a broad universe of funds across the This list focuses exclusively on U.S. small-cap ETFs with meaningful scale and transparent strategies. Funds are ranked by assets under management (AUM) to emphasize liquidity, survivability, and real-world investor adoption.
Each ETF was evaluated for:
- Index or rules-based methodology
- Diversification across sectors and holdings
- Cost structure relative to peers
- Long-term viability and investor usage
ETFs are then grouped into Core, Balanced, or High-Risk categories to help investors quickly understand how each fund might behave within a portfolio. For full details on our selection standards, visit the Impartoo Methodology page.
Frequently Asked Questions
What is a small-cap ETF?
What: A small-cap ETF is a fund that invests in U.S. companies with relatively smaller market values compared with large, household-name stocks. How: The ETF tracks an index or follows rules that select and weight hundreds of small-cap stocks into a single fund. Why: It gives investors diversified exposure to smaller companies without needing to pick individual stocks.
What is the difference between small-cap and large-cap stocks?
What: Small-cap stocks represent smaller companies, while large-cap stocks are well-established firms with much bigger market values. How: Index providers sort companies by market size and assign them to small-cap, mid-cap, or large-cap categories. Why: Smaller companies often grow faster but swing more in price, while large companies tend to be more stable.
What is a small-cap value ETF versus a small-cap growth ETF?
What: Small-cap value focuses on cheaper-priced companies, while small-cap growth emphasizes faster revenue or earnings expansion. How: Value ETFs screen for metrics like low price-to-earnings, while growth ETFs screen for higher sales or profit growth. Why: These styles perform well at different times, and mixing them can reduce performance swings.
What does AUM mean for an ETF?
What: AUM stands for assets under management, which is the total value invested in an ETF. How: It grows as investors add money and as the underlying holdings rise in price. Why: Higher AUM usually means better liquidity, tighter trading spreads, and a lower risk of fund closure.
Why are small-cap ETFs more volatile?
What: Small-cap ETFs tend to move up and down more than large-cap funds. How: Smaller companies are more sensitive to economic changes, interest rates, and access to financing. Why: The added risk is the trade-off for higher long-term growth potential.
How much of a portfolio should be in small-cap ETFs?
What: There’s no single right percentage, but many investors use small-caps as a supporting allocation rather than a core holding. How: Investors often allocate a portion of their equity exposure to small-caps alongside large-cap or total-market ETFs. Why: This adds growth potential without letting volatility dominate the entire portfolio.
Why do some small-cap ETFs screen for profitability?
What: Some small-cap ETFs avoid unprofitable companies. How: Index rules require companies to meet earnings or cash-flow thresholds before inclusion. Why: Profitability screens aim to reduce risk and avoid the weakest businesses in the small-cap universe.
How do factor-based small-cap ETFs work?
What: Factor ETFs tilt toward traits like value, momentum, quality, or revenue weighting. How: Rules rank stocks on specific metrics and give larger weights to those scoring highest. Why: These strategies try to outperform the broad market, but they can lag for long periods.
Why do small-cap ETFs perform best at certain times?
What: Small-caps tend to outperform during economic recoveries and early expansion phases. How: Improving growth, easier credit conditions, and rising risk appetite benefit smaller companies. Why: Understanding market cycles helps investors stay patient during weaker periods.
How often should small-cap ETFs be rebalanced?
What: Rebalancing means resetting your allocation back to a target percentage. How: Many investors rebalance annually or when allocations drift too far from plan. Why: Rebalancing controls risk and prevents small-caps from becoming too large or too small a part of the portfolio.
Final Thoughts on Small-Cap ETF Investing
Small-cap ETFs can play a valuable role in long-term portfolios, especially for investors seeking higher growth potential and willing to accept more volatility. Used thoughtfully alongside broader and defensive strategies, they can improve diversification and return potential over time. As always, consider your risk tolerance and goals, and consult a qualified professional before making investment decisions. This list is built to help you navigate the small-cap landscape with clarity, conviction, and a focus on enduring value. Small cap ETFs can drive outsized returns in the right cycle, but pairing them with steady plays like Top 10 Defensive Stocks or yield via Top 10 Dividend Stocks can help manage risk.
Explore More ETF Strategies
To broaden your research, explore related themes such as Top 10 REIT ETFs, Top 10 Clean Energy ETFs, and Top 10 ESG ETFs. Looking to expand your strategy? Check out our other Top 10 ETF lists across growth, dividends, total market, and sector-specific themes. Each one is curated to help you navigate the ETF landscape with clarity and confidence.
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