etf overlap tool · moderate overlap
XLK vs ITOT overlap
99.9% of XLK's money sits in companies ITOT also holds; 34% of the two funds is the same money, spread over 75 companies both hold.
Holdings as of October 16, 2026 · source: SPDR (XLK), iShares (ITOT) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold XLK and ITOT with other funds or stocks? The free portfolio optimizer opens XLK and ITOT beside the rest of what you own: the companies you hold twice, what the funds cost a year, and where the next deposit should go. No account.
The companies you would own twice
What only one of them gives you
Every XLK holding is also in the other fund.
AMZNAMAZON.COM INC3.32%Where each fund puts its money
XLK and ITOT: what people ask
How much do XLK and ITOT overlap?
34% by weight, as of October 16, 2026: moderate overlap. 75 companies appear in both funds; they make up 99.9% of XLK and 34% of ITOT.
Which stocks do XLK and ITOT both hold?
The largest shared positions are NVDA, AAPL, MSFT, AVGO and MU. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both XLK and ITOT?
Out of every $100 split evenly between them, about $34 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 0 names only in XLK, 2,348 only in ITOT. Half in each behaves like 27 equally weighted stocks, against 14 for XLK alone and 56 for ITOT alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.
How is ETF overlap calculated here?
For every company held by both funds we take the smaller of its two weights and add them up. The weights come from the full holdings files SPDR and iShares publish, not a top-10 sample, and companies are matched by their ISIN so share classes stay apart. Sector overlap applies the same rule to the issuers' sector labels; "behaves like N equally weighted stocks" is one over the sum of the squared weights.
Weights come from each issuer's published holdings file and are matched company by company on their ISIN. Cash, futures and currency positions are left out. This page describes what the funds hold; it is not investment advice.