You own more of some companies than your statement shows
Published 2026-10-02
Your statement lists your funds. It does not list what the funds own. Most broad funds hold the same large companies, so one company can sit inside several of your funds at once. This page shows how to add that up yourself.
Step 1: find what each fund holds
Every fund publishes its holdings. The two places to look:
- The fund provider's own page for the fund. Most list top holdings with weights and an "as of" date. Some offer a full downloadable file.
- The SEC. U.S. mutual funds and ETFs report holdings to the SEC. The public release is roughly 60 days after each quarter ends, so a full SEC file can be a couple of months old.
Write down the date. Weights move every day, so a number without a date can't be checked.
Step 2: watch for the same company listed twice
One company can appear on more than one line. As an example of what a provider publishes: on its SPY page, State Street lists Alphabet twice, as Class A and as Class C. As of October 1, 2026, those were 3.00% and 2.41% of the fund.
3.00% + 2.41% = 5.41% of that fund is one company.
If you only read the top of the list for the biggest name, you would see Alphabet as 3.00% and miss 2.41%. Share classes are the most common reason a by-hand total comes out low.
Source: State Street Investment Management, SPY fund page, holdings as of October 1, 2026. Holdings are subject to change.
Step 3: turn each percentage into dollars
For each fund: your dollars in the fund × the company's weight in that fund. Everything below is hypothetical.
| Account | Fund (hypothetical) | Your balance | Weight of Company X | Dollars in Company X |
|---|---|---|---|---|
| Taxable brokerage | Fund A, U.S. total market index | $60,000 | 6% | $3,600 |
| Roth IRA | Fund B, large-cap index | $30,000 | 7% | $2,100 |
| Old 401(k) | Fund C, target-date | $50,000 | 3% | $1,500 |
| Total | $140,000 | $7,200 |
$7,200 ÷ $140,000 = 5.1% of the whole portfolio in one company. No row on a statement says $7,200. Each fund shows only its own slice.
Step 4: check for funds inside funds
A target-date fund or a fund of funds holds other funds, not companies. You then need that fund's holdings too, then the weights inside those. This is the step people skip, and it is why target-date money is usually missing from a by-hand total.
Step 5: repeat when anything changes
Holdings change, you buy and sell, and files update quarterly. A by-hand total is accurate for the day you made it.
What the number does and doesn't tell you
It tells you how much of your money sits in one company, counting every fund. It does not tell you whether that is too much. That depends on your goals, your taxes, which accounts the funds are in, and your other assets. We show the number; the decision is yours.
Skip the arithmetic for a few funds
Our fund overlap calculator takes two to five fund tickers and a portfolio value and shows the holdings those funds share and your largest single-company exposure through them. No account, nothing saved. It splits the value equally across the tickers, so treat it as an illustration unless your balances are about equal. It does not follow funds inside funds.
If you also want the cost side, see what your funds actually cost you per year. If you keep this in a spreadsheet, see what a spreadsheet can't do.
Datum shows you what you own. It does not give investment advice or recommend what to buy or sell.