iShares S&P Mid-Cap 400 Growth ETF (IJK) holdings & weights
Per-holding contribution · concentration · sector skew — a deep read
Fund overview
This is a US-listed ETF from BlackRock. It tracks the S&P Mid Cap 400 Growth. Key facts — expense ratio 0.16%; net assets about $10.4B; inception Jul 24, 2000. Its 1-year return is +16.14%.
Fund details
Fund overview
This is a US-listed ETF from BlackRock. It tracks the S&P Mid Cap 400 Growth. Key facts — expense ratio 0.16%; net assets about $10.4B; inception Jul 24, 2000. Its 1-year return is +16.14%.
24 identified stocks · net exposure / NAV 26.77%. 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
24 identified stocks · net exposure / NAV 26.77%. 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 S&P Mid-Cap 400 Growth ETF's theoretical return is -0.05%p. Today's biggest hero is APi, contributing -0.00%p (return -0.20%). The biggest suspect dragging it down is ATI, at -0.05%p.
Its top 10 holdings make up about 50.5% of the fund. The concentration index (HHI) is 438 — Low — evenly diversified, and the largest sector is Industrials (26%). 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 (438), so no single holding dominates.
The largest sector is Industrials at 26% — industries are reasonably spread.
0.16% a year is typical. Held ten years, roughly 1.6% goes to fees.
Net assets of $10.4B — 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 (438), so no single holding dominates.
The largest sector is Industrials at 26% — industries are reasonably spread.
0.16% a year is typical. Held ten years, roughly 1.6% goes to fees.
Net assets of $10.4B — 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 | OktaOKTA | 6.76% |
| 2 | TechnipFMCFTI | 5.94% |
| 3 | ATIATI | 5.49% |
| 4 | nVent ElectricNVT | 4.97% |
| 5 | United TherapeuticsUTHR | 4.97% |
| 6 | XPOXPO | 4.74% |
| 7 | Tenet HealthcareTHC | 4.67% |
| 8 | RokuROKU | 4.41% |
| 9 | Royal GoldRGLD | 4.37% |
| 10 | WoodwardWWD | 4.22% |
| 11 | Carpenter TechnologyCRS | 4.03% |
| 12 | Curtiss-WrightCW | 4.03% |
| 13 | MACOM Technology SolutionsMTSI | 3.96% |
| 14 | ITTITT | 3.85% |
| 15 | DynatraceDT | 3.81% |
| 16 | ToastTOST | 3.51% |
| 17 | Coeur MiningCDE | 3.44% |
| 18 | Talen EnergyTLN | 3.44% |
| 19 | RBC BearingsRBC | 3.40% |
| 20 | APiAPG | 3.36% |
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) is low at 438, with the top 10 holdings at just 50.5% of equity weight. No single name can dominate the fund.
Good for damping single-stock risk — and equally, a big winner inside gets diluted.
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
Sectors run Industrials(26%) · Information Technology(25%) · Consumer Discretionary(17%), and even the largest is only 26% — no meaningful industry tilt.
This is built to track a market rather than to call a sector.
Weights above sum the individually listed equities and normalize that equity total to 100%.
How much it overlaps others
It shares 78% of its holdings with IVOG (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 253 positions in total; this page lists the largest 24 and folds the rest into "Others".
Equities are 26.8% of the fund, the rest swaps and cash — index exposure built synthetically rather than by owning the shares, which adds counterparty risk.
The expense ratio is 0.16% 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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