XLE vs. VDE vs. IYE: Energy ETF Holdings, Index Rules, and Overlap

“Energy ETF” can describe a fund holding a narrow slice of large U.S. companies, a much wider market-cap range, or a differently classified industry basket. The index provider chooses the eligible company universe, industry taxonomy, reconstitution calendar, weighting, and concentration controls. Those details can change which refiners, pipeline operators, oilfield-service firms, and renewable-power companies enter the fund.

These are issuer portfolio figures, not a synchronized count of index constituents. Vanguard’s holdings API reports 111 VDE equity holdings with an August 31 snapshot; iShares dates its holding count to September 24; State Street dates XLE’s count to September 24. A fund can also hold cash, collateral, or a small derivative position alongside stocks. Do not treat the figures as if they were measured under one common definition on one common date. The current fund descriptions and holdings sources are on the State Street XLE page, Vanguard VDE page, Vanguard’s dated VDE holdings data, and iShares IYE page.

XLE’s Energy Select Sector Index draws companies from the S&P 500 that S&P Dow Jones Indices classifies in the energy sector under GICS. Its coverage includes oil, gas, and consumable fuels plus energy equipment and services. It is consequently a large-company subset of the broader U.S. energy market: a smaller exploration company can fall outside XLE because it is not an S&P 500 member, even when its business is plainly energy-related. S&P says the Select Sector index applies capping to support diversification. See the Energy Select Sector Index profile and the S&P U.S. Indices Methodology.

VDE follows the MSCI US Investable Market Energy 25/50 Index. MSCI describes this benchmark as covering large-, mid-, and small-cap segments of the U.S. equity market, with constituents classified in the GICS Energy sector. The 25/50 rules apply issuer concentration limits at index construction and review: a single issuer is constrained around 25%, while issuers above 5% together are constrained around 50%, subject to the methodology’s issuer grouping and buffers. Those limits do not make the portfolio equal-weighted or prevent a small number of majors from dominating the fund. Vanguard reports a full-replication approach when possible; its August 31 holdings API lists 111 stocks. See Vanguard’s VDE profile, dated VDE holdings data, MSCI’s Energy 25/50 fact sheet, and MSCI’s 25/50 methodology.

IYE follows the Russell 1000 Energy RIC 22.5/45 Capped Index. FTSE Russell’s index code sheet describes a U.S. large-cap energy universe classified under ICB; at quarterly reviews, a single company is limited to 22.5% and companies above 4.5% together are limited to 45%. Because these are review-time rules, market moves between reviews can make a fund’s current holding weights differ from the cap levels. IYE’s benchmark is therefore related to the same broad U.S. energy theme but does not use either XLE’s S&P 500/GICS boundary or VDE’s MSCI investable-market/GICS boundary. Read the Russell index code sheet alongside FTSE Russell’s capping methodology guide.

XLE’s September 24, 2026 issuer file reported 21 fund holdings. ExxonMobil and Chevron alone accounted for 41.42% of the portfolio in the displayed snapshot. The next holding, ConocoPhillips, was 6.84%; after the first three, the displayed weights fell below 5%. This is a concentrated large-company sector sleeve, not a representative sample of every U.S. energy business.

State Street’s profile lists a fund-industry allocation dated September 24: 91.57% in Oil, Gas & Consumable Fuels and 8.43% in Energy Equipment & Services. Those broader labels show that XLE is not solely an oil-producer portfolio. It also has exposure to service companies and other energy businesses, although the market value of the integrated majors drives a large share of its weight. The allocation and holdings snapshots are both dated September 24; see State Street’s daily holdings spreadsheet and current XLE portfolio page.

Vanguard’s August 31, 2026 holdings snapshot reports 111 stocks and supplies the weights used here. VDE extends beyond the S&P 500 companies in XLE to smaller companies within the MSCI investable-market energy universe. Yet breadth by security count does not imply equal contribution to return: ExxonMobil was 21.82%, Chevron 14.03%, and ConocoPhillips 5.99% in the August 31 VDE snapshot. Those three positions total 41.84% of the displayed weights. A broad index can still be top-heavy when the largest companies have much larger market values.

The broader company range changes the edge of the basket more than the identity of its largest exposures. VDE’s August holdings include exploration, transportation, and service companies beyond the S&P 500-only XLE universe. That can diversify company-size exposure within the energy sector, but it does not remove the fund’s dependence on large integrated producers, commodity-linked cash flows, and sector-wide capital spending. The official Vanguard VDE profile identifies the benchmark and market-cap exposures, and Vanguard’s dated holdings data shows the portfolio snapshot.

BlackRock reported 40 IYE holdings on September 24, 2026. In that dated CSV, ExxonMobil was 23.07%, Chevron 15.95%, and ConocoPhillips 6.42%. The file also lists positions such as First Solar, Enphase Energy, and Nextpower, which it labels in Information Technology or Industrials. Those rows illustrate that a fund name, an index’s industry taxonomy, and an issuer’s display-sector labels are not always interchangeable descriptions. See the iShares IYE holdings CSV.

IYE’s exposure table shows why it is useful to inspect the actual holdings file rather than infer the portfolio from “U.S. Energy” in the fund name. As of September 24, integrated oil and gas represented 40.84% of market value, exploration and production 20.67%, storage and transportation 14.50%, refining, marketing and transportation 13.78%, and equipment and services 8.52%. The remaining small categories include technology-related classifications, industrials, and cash or derivatives. These figures follow the iShares page’s own categories and date; they should not be matched directly to XLE’s broader S&P industry buckets or Vanguard’s taxonomy as if all three sponsors applied one identical sector map. The current fee, index, holdings count, and product documents are on iShares’ IYE page.

The table ranks each fund’s latest issuer snapshot. XLE, VDE, and IYE are dated September 24, August 31, and September 24 respectively, so the columns do not describe one synchronized portfolio. Names appear across all three top-ten lists, but that does not mean their shares or portfolio weights were identical at one time.

The table adds the displayed weights rounded to two decimals: XLE totals 77.52%, VDE 65.47%, and IYE 70.94%. Summing VDE’s unrounded source values first gives 65.47944%, or 65.48% when rounded; the one-basis-point difference comes from rounding each row before adding. These are concentration descriptions of differently dated files, not a synchronized ranking. Nine ticker symbols appear in all three top-ten lists; BKR is in VDE’s list where KMI appears in XLE and IYE. A full overlap ratio needs the complete holdings files on one common date, mapped by persistent security identifiers and with cash and derivatives treated consistently.

The shared XOM, CVX, COP, and other major positions show that these funds occupy related territory. Still, their smaller holdings and inclusion rules differ. A company can be absent from XLE because it is not in the S&P 500, absent from VDE because it is not in the MSCI GICS Energy universe, or present in IYE under the Russell/ICB classification and cap regime. A top-ten match only sees a small part of the basket.

Holding all three funds can increase repeated exposure to the same large producers instead of creating three independent energy allocations. For a full account review, identify each fund’s underlying positions at an aligned date, multiply each security weight by the account amount invested in each ETF, then sum by company. This look-through calculation should match share classes or permanent identifiers, not just display names. Without the synchronized full files, adding the three top-ten percentages together would double-count names and would not measure the account’s unique-company exposure.

XLE, VDE, and IYE own shares of public companies; they do not represent a fixed quantity of crude oil or replicate a WTI futures contract. A producer’s earnings can respond to oil and gas prices, but it also depends on production volumes, hedges, costs, taxes, debt, and capital spending. Refiners may benefit from one spread environment and be hurt by another. Pipeline operators, service firms, and renewable-energy companies have yet other drivers.

This is why the three equity ETFs can move differently from crude prices and from one another. For a contract-based explanation of the commodity side, see WTI crude-oil futures. Energy-sector equity risk includes stock-market valuation and company-specific operating risks as well as commodity cycles. Neither a high energy-sector weight nor a top-ten overlap table is a direct oil-price forecast.

A broad-market fund such as VOO or VTI may already hold large U.S. energy companies because they are part of its market-cap-weighted universe. Adding XLE, VDE, or IYE can therefore tilt a portfolio toward companies it already owns. The sector ETF changes the weight and concentration of that exposure rather than automatically adding a new source of diversification. Compare the broad baskets in VTI vs. VOO and SPY vs. IVV vs. VOO before assuming that a new ticker means a new underlying holding.

For the same reason, the stock-level overlap among XLE, VDE, and IYE is only one part of portfolio risk. Energy company returns can share exposure to demand, inflation, geopolitics, and financing costs, while refining, pipelines, services, and upstream production can react differently to the same event. The index taxonomy determines which slice enters each ETF; it does not guarantee that the fund will behave as a hedge against broad equities or as a hedge against higher oil prices.

The issuer pages list expense ratios of 0.08% for XLE, 0.09% for VDE, and 0.37% for IYE. On a hypothetical balance held constant at US$10,000 for one year, the simple annual arithmetic is:

• XLE: US$10,000 × 0.0008 = about US$8
• VDE: US$10,000 × 0.0009 = about US$9
• IYE: US$10,000 × 0.0037 = about US$37

That is a $1 difference between XLE and VDE and $28–$29 between IYE and the other two in this static example. Actual fund expenses accrue over time against changing assets; this arithmetic is neither a bill nor a return forecast. It also excludes bid-ask spreads, brokerage costs, taxes, trading friction, sampling, and differences between a fund and its benchmark. See the expense ratio and total fund cost guide and the tracking difference guide.

Start with the exposure question. If you mean S&P 500 energy companies, XLE’s benchmark has that explicit parent universe. If you want energy companies across market caps under GICS, VDE’s MSCI investable-market benchmark reaches further down the size range. If you want the Russell 1000 energy universe under its RIC caps and ICB classification, IYE is the relevant construction to examine. These descriptions answer what each index is built to represent; they do not rank likely performance.

Then align the evidence: use holdings files from the same date; distinguish equity names from cash and derivatives; map securities with CUSIP, ISIN, or another stable identifier; and use one consistent industry taxonomy. Compare current prospectus fees and trading costs alongside market-cap range, concentration, and benchmark rules. Here the three latest available files do not share a date, so the article reports their snapshots separately and makes no same-day full-portfolio overlap claim. It is an educational comparison of basket design, not a recommendation to buy or sell a fund.