You Own 3 ETFs. The Same 7 Stocks Are in All of Them. What do you do?
Three ETFs. Hundreds of holdings. One problem — the same 7 stocks quietly dominating all of them. Here’s the overlap audit that shows you exactly how much real diversification that combination actually delivers.
10/13/20269 min read
Think You're Diversified? Your ETFs May Tell a Different Story.
You own an S&P 500 ETF, a Nasdaq-100 ETF, and a dividend ETF. Three funds. Three different strategies. A diversified portfolio, right? Not necessarily...
These funds can own many of the same companies. That means you may have more money tied to a small group of large stocks than you realize. This matters if you invest for long-term growth or dividend income. You might buy a dividend ETF to balance your growth investments, only to discover that both funds hold many of the same companies.
The solution is an ETF overlap audit: a check to see which stocks your funds share and how much of your portfolio depends on them.
In this Wealth Hunter audit, we'll examine how ETF overlap works, how to measure your real exposure, and what to do if your portfolio is less diversified than you thought.
Key Takeaways
Owning more ETFs does not automatically make your portfolio more diversified.
The biggest concern is how much of your money depends on the same companies.
Overlap is not always bad. It depends on your goals and the risks you want to take.
You can start with a free ETF overlap calculator before paying for a research tool.
High overlap alone is not a reason to sell. Understand what you own first.
1. How Can Different ETFs Own the Same Stocks?
In this simplified example, the overlapping weights add up to 10%. The calculation uses the smaller weight for each shared stock. If Fund A puts 8% into Company X and Fund B puts 5% into it, the shared weight is 5%. This helps you understand how much the two funds duplicate each other.
The number of shared stocks doesn't tell you how much the funds overlap. Two ETFs might own many of the same small investments but have little money in common. Another pair might share fewer stocks but invest much more money in those same companies.
Also, the 10% overlap in this example compares Fund A with Fund B. It does not mean 10% of your entire portfolio is invested in those stocks.
Method 2: Calculate your real exposure across all funds
This is the more useful check when you want to understand your overall concentration. Imagine your portfolio is split between two ETFs:
How the math works::
Fund A: 60% × 5% = 3% of your portfolio.
Fund B: 40% × 10% = 4% of your portfolio.
Total exposure to Company X: 7% of your portfolio.
You may never have bought Company X directly, but it still represents 7% of your investments through the two ETFs. If you also own Company X shares directly, add that position to the total.
This is called look-through exposure. It helps you see what you own underneath the ETF names. You do not need to calculate every company by hand if a portfolio tool can show your exposure across multiple funds.
4. Four Warning Signs to Look For
An overlap audit becomes useful when you connect the numbers to your investment goals.
Warning sign 1: One company takes up a large share of your portfolio
After combining the exposure from all your funds and direct stock holdings, you may discover that one company represents a much larger share of your investments than you expected. That is not automatically wrong. But ask yourself whether you deliberately chose that level of exposure.
If the company suffers a major setback, a concentrated portfolio may take a bigger hit.
Warning sign 2: Several funds depend on the same sector
You might own multiple ETFs and still have a heavy focus on technology, financial services, or another industry. This is a problem I continuously struggle with too!
Check the combined sector exposure instead of looking at each fund separately. A sector downturn can affect several funds at once if they own many of the same businesses.
Warning sign 3: A more expensive fund adds little value
Suppose you own a low-cost broad-market ETF and then add a more expensive technology ETF. The second fund may increase your exposure to technology companies you already own through the first fund. That may be intentional. But before paying the extra fee, check whether the additional exposure fits your strategy.
Warning sign 4: You expected one fund to protect you from another
A dividend ETF does not automatically protect you from a growth-stock downturn. Nor does owning several funds guarantee that they will perform differently when markets fall.
Look at the actual holdings and the risks they share. Different fund names do not necessarily mean different sources of risk.
5. How to Run an ETF Overlap Audit in Four Steps
Step 1: List all your investments
Write down your ETFs, mutual funds, and individual stocks. Include holdings across your different investment accounts if you want to understand your overall exposure. A fund in one account may overlap with another fund in a different account. Reviewing only one account can leave you with an incomplete picture.
Step 2: Check which funds hold the same companies
Start with funds that appear to serve similar purposes, such as:
An S&P 500 ETF and a Nasdaq-100 ETF.
A broad-market ETF and a large-cap growth ETF.
A dividend ETF and a broad-market ETF.
Two dividend ETFs with different screening rules.
Focus first on the funds that make up the largest part of your portfolio.
Check out our Tool Hunt page for more on the best tools to use for this.
Step 3: Add up your total exposure
Do not stop after comparing one pair of funds. A company may appear in three or four of your investments. Look at how much of your total portfolio depends on that company. Then review your sector exposure. You might own several funds with different names but still have a large share of your money tied to the same industry.
There is no single concentration limit that works for every investor. read
The important thing is to know your exposure and choose it deliberately.
Step 4: Decide whether the overlap makes sense
If you find overlap, ask yourself:
Do I want extra exposure to these companies?
Does the second fund add something useful?
Am I paying higher fees for investments I already own?
Could a simpler portfolio achieve the same goal?
Would selling create taxes or other costs?
If the overlap is accidental, you might direct future contributions toward investments that fill a gap in your portfolio. You could also consider simplifying your holdings.
If the overlap is intentional and fits your goals, keeping both funds may be reasonable.
Do not sell investments just because a calculator reports a high overlap percentage. Understand the risk and the costs before acting.
6. Which Tools Can Help You Find ETF Overlap?
You can start with a free calculator. A paid research tool may be useful if you regularly review many funds or want a broader view of your portfolio.
ETF Research Center: Best for a Quick, Free Comparison
ETF Research Center provides a tool for comparing two ETFs and reviewing their shared holdings.
Best for: Investors who want to check whether two funds own many of the same stocks before buying another ETF.
Limitation: Comparing two funds at a time is not the same as auditing your entire portfolio. You still need to understand how all your holdings combine.
Morningstar Investor: Best for Broader Portfolio Analysis
Morningstar Investor offers portfolio analysis features that can help you review allocation, sector exposure, and overlapping stock holdings. Its tools may be especially useful if you own several ETFs and mutual funds and want to understand what you hold underneath them.
Best for: Investors who want to examine their portfolio as a whole, rather than only compare two funds.
Limitation: Morningstar Investor is a paid service after any applicable trial. Check the current subscription terms and make sure you will use its wider research features before paying.
Stock Rover: Best for Hands-On Investment Research
Stock Rover offers stock and ETF research, screening, and portfolio analysis features.
It may be worth considering if your overlap audit is part of a wider research process that includes evaluating dividend stocks, comparing financial metrics, and monitoring investments.
Best for: DIY investors who want to combine portfolio monitoring with detailed stock research.
Limitation: Features vary by plan. Check the current plan details to confirm that the portfolio analysis you need is included.
Which Tool Should You Choose?
Only comparing two ETFs? Start with the free ETF Research Center calculator.
Want to understand how multiple funds combine across your portfolio? Investigate Morningstar's portfolio analysis features.
Want overlap checks alongside broader stock research? Compare Stock Rover's current portfolio features and plans.
Do not pay for a subscription simply because it has more features. Choose a tool that solves a real problem in your investment process.
7. What Should You Do If You Find High Overlap?
Finding overlap does not automatically mean you need to change your portfolio. You have three main options.
Option 1: Keep both funds
If you deliberately want extra exposure to certain companies or sectors, overlap may be part of your strategy. Just understand that this can increase both potential gains and potential losses tied to those investments.
Option 2: Direct future contributions elsewhere
If you want broader exposure but do not want to sell existing holdings immediately, you could direct future contributions toward investments that fill a gap in your portfolio. This may gradually change your allocation, although it will not remove the overlap already present.
Option 3: Consider simplifying your portfolio
If two funds serve almost the same purpose, you may decide that one is enough. Before selling, check the tax impact. Selling investments in a taxable account can create a capital gain or loss. Tax rules also differ by country and account type, so do not assume every sale is tax-free.
You should also consider each fund's cost, investment strategy, and role in your portfolio. The goal is not to own the fewest ETFs possible. It is to own investments that work together for a clear reason.
Final Verdict: Audit Your ETFs Before Buying Another
ETF overlap is easy to miss because fund names describe their strategies—not every company you end up owning. The best way to find hidden concentration is to look underneath those names. Compare shared holdings, calculate your exposure across your portfolio, and decide whether that exposure fits your goals.
If you only need to compare two funds, a free overlap calculator may be enough. If you want to review many funds, sector exposure, and your overall portfolio regularly, a dedicated research tool may save time.
But remember: overlap is a finding, not a verdict. It tells you where to investigate, not what you must sell or simply do. Before adding another ETF, ask yourself one question:
What will this fund add to my portfolio that I don't already have?
That simple question can help you avoid unnecessary duplication and build a portfolio you understand.
Disclosure: This article is for educational purposes only and may contain affiliate links. Wealth Hunter may earn a commission if you subscribe through qualifying links, at no additional cost to you. This article is not financial or tax advice. Check current tool features and pricing before subscribing, and consider your own goals and tax situation before changing your portfolio.
ETFs follow rules that determine which investments they hold. Because some funds follow similar strategies or invest in similar parts of the market, their holdings can overlap. Consider three common types of ETFs:
S&P 500 ETF: Tracks large U.S. companies across many industries.
Nasdaq-100 ETF: Tracks large non-financial companies listed on the Nasdaq. It has a strong focus on technology and growth companies.
Dividend ETF: Selects stocks based on dividend-related rules, such as dividend history, yield, or financial strength.
These funds have different goals, but they can still own some of the same businesses. For example, Microsoft and Apple may appear in both an S&P 500 ETF and a Nasdaq-100 ETF. A dividend ETF may also hold some of the same companies, depending on its investment rules. If you own all three funds, you own those companies through each fund—not just once. That is the key idea behind ETF overlap.
The problem isn't owning the same stock more than once. It's not knowing how much of your money depends on it.
2. Why ETF Overlap Matters for Dividend Investors
ETF overlap can create three problems worth investigating.
Risk may be higher than you think
A portfolio can contain several funds but still depend heavily on a handful of large companies. If those companies fall, multiple funds in your portfolio may fall at the same time.
This does not mean large companies are bad investments. It means the number of funds you own does not tell you the full story about your risk.
Your funds may not balance each other
Suppose you own a growth ETF and a dividend ETF because you expect them to play different roles. But if both hold many of the same companies, they may not provide as much variety as you expected. And remember: dividend stocks are not automatically safer than growth stocks. A company can pay a dividend while its share price falls.
You may pay for similar investments twice
Two ETFs can have different names, strategies, and fees while owning many of the same companies. That is not always a problem. You might deliberately want extra exposure to certain stocks.
But if your goal is broader diversification, ask whether the second fund adds enough value to justify its cost. An ETF's expense ratio is its annual operating fee, expressed as a percentage of your investment. A higher fee may be worthwhile if a fund serves a useful purpose. Paying more for an investment that largely duplicates what you already own deserves a closer look.
3. How to Measure ETF Overlap
There are two useful ways to audit overlap.
The first compares two ETFs. The second looks across your entire portfolio to estimate how much you have invested in each company.
Method 1: Compare two ETFs
An overlap calculator shows which companies appear in both funds and how much each fund invests in them. For example, imagine two funds hold these stocks:
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