iShares U.S. Oil Equipment & Services ETF (IEZ) holdings & weights
Per-holding contribution · concentration · sector skew — a deep read
Fund overview
This is a US-listed ETF from BlackRock. It tracks the DJ US Select / Oil Equipment & Services. Key facts — expense ratio 0.37%; net assets about $332M; inception May 1, 2006. Its 1-year return is +47.32%.
Fund details
Fund overview
This is a US-listed ETF from BlackRock. It tracks the DJ US Select / Oil Equipment & Services. Key facts — expense ratio 0.37%; net assets about $332M; inception May 1, 2006. Its 1-year return is +47.32%.
25 identified stocks · net exposure / NAV 97.11%. Display weights are normalized to 100%; calculations retain original exposures without an additional leverage multiplier. Cash and unallocated contracts are excluded from stock attribution.
Weight and calculation basis
25 identified stocks · net exposure / NAV 97.11%. Display weights are normalized to 100%; calculations retain original exposures without an additional leverage multiplier. Cash and unallocated contracts are excluded from stock attribution.
Today's summary
On a constituent basis, iShares U.S. Oil Equipment & Services ETF's theoretical return is -0.02%p. Today's biggest hero is Archrock, contributing -0.02%p (return -0.58%). The biggest suspect dragging it down is Archrock, at -0.02%p.
Its top 10 holdings make up about 75.0% of the fund. The concentration index (HHI) is 1214 — Low — evenly diversified, and the largest sector is Energy (74%). The higher the concentration, the more one stock or sector drives the whole ETF's return.
Structural health
A five-axis read on how this fund is built. It is not a return forecast or a recommendation, and a low score does not mean a bad fund — leveraged products score low by design. Each axis shows the figure behind it.
Concentration is below 1,500 (1,214), so no single holding dominates.
Energy alone is 74%. This is effectively a bet on that one industry — if the sector falls, diversification will not help.
0.37% a year is typical. Held ten years, roughly 3.7% goes to fees.
Net assets of $332M — liquid enough to trade, and unlikely to be wound down.
A plain 1x physical fund holding the shares themselves — no structural drift from how long you hold it.
Concentration and diversification
Structural health
A five-axis read on how this fund is built. It is not a return forecast or a recommendation, and a low score does not mean a bad fund — leveraged products score low by design. Each axis shows the figure behind it.
Concentration is below 1,500 (1,214), so no single holding dominates.
Energy alone is 74%. This is effectively a bet on that one industry — if the sector falls, diversification will not help.
0.37% a year is typical. Held ten years, roughly 3.7% goes to fees.
Net assets of $332M — liquid enough to trade, and unlikely to be wound down.
A plain 1x physical fund holding the shares themselves — no structural drift from how long you hold it.
Top 20 holdings
Weights are normalized to 100% of absolute exposures across analysed positions, including positions outside this top list. Cash, collateral and unverified assets are excluded. Contributions retain original signed NAV exposures; leverage is not applied twice.
Normalized to 100% of analysed positions
Weights are normalized to 100% of absolute exposures across analysed positions, including positions outside this top list. Cash, collateral and unverified assets are excluded. Contributions retain original signed NAV exposures; leverage is not applied twice.
| # | Holding | Weight |
|---|---|---|
| 1 | SLBSLB | 23.03% |
| 2 | Baker HughesBKR | 22.90% |
| 3 | HalliburtonHAL | 4.79% |
| 4 | TechnipFMCFTI | 4.75% |
| 5 | NOVNOV | 3.84% |
| 6 | TransoceanRIG | 3.24% |
| 7 | NobleNE | 3.20% |
| 8 | ValarisVAL | 3.20% |
| 9 | Weatherford InternationalWFRD | 3.14% |
| 10 | ArchrockAROC | 2.95% |
| 11 | Kodiak Gas ServicesKGS | 2.72% |
| 12 | Patterson-UTI EnergyPTEN | 2.49% |
| 13 | Oceaneering InternationalOII | 2.48% |
| 14 | CactusWHD | 2.45% |
| 15 | Solaris Energy InfrastructureSEI | 2.35% |
| 16 | Helmerich & PayneHP | 2.13% |
| 17 | TidewaterTDW | 2.09% |
| 18 | SeadrillSDRL | 1.68% |
| 19 | Liberty EnergyLBRT | 1.54% |
| 20 | Select Water SolutionsWTTR | 1.30% |
Holdings below 0.5% or outside the top list are folded into “Others” and omitted above.
Where the weight sits — sector mix
Listed equity weights summed by sector and normalized to 100%. Each band is one sector's share.
Industry breakdown
HHI sums the squared weights. The more it leans on a few names, the higher it goes — and the more the whole ETF moves with them.
How concentrated is it
Concentration (HHI) sits at 1214 — moderate. The top 10 names carry 75.0% of equity weight, so the fund is spread out but its largest holdings still steer it.
That is the usual shape of a cap-weighted index fund: broad, yet tilted toward the biggest companies.
HHI squares each weight and sums them: 10,000 means one stock is everything, and the more evenly spread the holdings, the closer it falls to zero.
Where the sector weight sits
By sector, Energy alone is 74% — whatever the fund is called, this is a bet on that industry.
Bad news for the sector moves the whole fund. Worth checking against anything else you hold in the same space.
Weights above sum the individually listed equities and normalize that equity total to 100%.
How much it overlaps others
It shares 75% of its holdings with OIH (20 names in common) — close to half the same companies.
Own both and the diversification is thinner than it looks.
What it is made of
The fund holds 36 positions in total; this page lists the largest 25 and folds the rest into "Others".
The expense ratio is 0.37% a year. Funds tracking the same index tend to perform alike, which makes the fee one of the few things that reliably separates them over time.
This page is not investment advice. Investment decisions and responsibility are your own.
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