257 essays 1,087 funds measured independent · not paid by any fund or issuer we cover

Fund · iShares U.S. Oil & Gas Exploration & Production ETF · measured from SEC filings

IEO holdings

IEO reports 47 holdings and behaves like 13.9 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-06-30. The fact sheet publishes the first number; this page computes the second, and traces it across 28 quarters of filings.

Measured concentration

as of 2026-06-30

Read this figure with the following in mind

3.4% of net assets is securities-lending cash collateral, excluded from the figure; counted as filed the fund would read 13.7

The figure below is what the filing says, published unchanged. What it may not do is sit beside a plain long-only fund and be read as the same quantity. How comparability is decided.

47 Positions reported
13.9 Effective holdings
3.4× Concentration multiple
71.25% Top ten weight

Computed by this site from the fund's SEC Form N-PORT filing; what the measure does not tell you · every fund in one table · hold it with other funds? X-ray the mix. Pricing: 100% at a quoted market price (level 1), one issuer country.

What stands out

as of 2026-06-30

IEO's largest investment is Conocophillips at 17.26% of net assets. Valero Energy Corp and Marathon Petroleum Corp follow; the three together are 37.98%. Ten companies are 71.25% of the fund; the other 37 share the rest. Among the 721 equity funds measured here, IEO behaves like 13.9 holdings against a median of 42.4 — 3.0 times more concentrated than the median. Across 28 quarterly filings IEO has held roughly steady since 2019-09-30 (15.1 then, 13.9 now). Between the 2026-03-31 and 2026-06-30 filings 1 positions were added and 2 dropped; 12.8% of the weight moved.

Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable equity funds on this site. Nothing here is a view on the fund.

Every filing since 2019

28

Between 2019-09-30 and 2026-06-30, IEO went from behaving like 15.1 equally weighted positions to 13.9 — 8% fewer, while its top ten went from 68.62% to 71.25% of net assets. Read across the funds on the concentration-over-time table.

PeriodHoldingsEffective Top 10Largest
2026-06-30 47 13.9 71.25% 17.26%
2026-03-31 48 13.2 70.64% 19.46%
2025-12-31 48 13.2 71.33% 19.52%
2025-09-30 48 13.2 71.46% 19.21%
2025-06-30 49 13.5 71.36% 18.24%
2025-03-31 49 12.7 71.26% 20.1%
2024-12-31 48 12.8 70.2% 20.26%
2024-09-30 49 13.7 69.41% 18.78%
Earlier filings (20 more, back to 2019-09-30)
PeriodHoldingsEffectiveTop 10Largest
2024-06-30 48 13.3 70.17% 19.12%
2024-03-31 49 13.8 70.72% 18.38%
2023-12-31 48 13.5 70.33% 19.3%
2023-09-30 47 13.6 69.85% 19.19%
2023-06-30 51 15.1 67.24% 17.7%
2023-03-31 49 15.2 68.66% 16.68%
2022-12-31 49 14.3 67.9% 18.66%
2022-09-30 51 14.9 67.4% 18.09%
2022-06-30 51 15.2 67.57% 17.28%
2022-03-31 53 15 67.12% 17.67%
2021-12-31 52 14.7 68.63% 17.72%
2021-09-30 51 14.6 68.33% 18.12%
2021-06-30 48 15.4 67.64% 16.64%
2021-03-31 45 14 70.91% 17.71%
2020-12-31 42 15.2 69.51% 14.53%
2020-09-30 41 14.6 70.49% 15.95%
2020-06-30 41 13.8 71.72% 16.4%
2020-03-31 55 13 72.86% 17.49%
2019-12-31 57 15.2 68.31% 15.27%
2019-09-30 59 15.1 68.62% 14.7%

One row per filed reporting period, newest first, read from EDGAR. Quarterly because that is the public filing cadence. Rows marked * are published but held out of the comparison above; the methodology page says when and why.

As filed, collateral included

3.39% collateral

IEO's filing lists 48 positions including 3.39% of net assets in securities-lending cash collateral. Counted as filed the fund reads 13.7 effective holdings with a top ten of 71.26%; on its own investments — the figure above — it reads 13.9 with a top ten of 71.25%. The collateral is matched by a liability and is not a holding the fund chose; since 2026-09-18 every figure on this site sets it aside (methodology). Both numbers are in the data.

Largest positions, as filed

as of 2026-06-30

The 15 largest of 47 positions in IEO's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: IEO.csv.gz.

#PositionWeightCumulative
1CONOCOPHILLIPS17.26%17.3%
2VALERO ENERGY CORPORATION10.54%27.8%
3MARATHON PETROLEUM CORPORATION10.17%38.0%
4EOG RESOURCES, INC.6.56%44.5%
5EQT CORPORATION4.84%49.4%
6TEXAS PACIFIC LAND CORPORATION4.77%54.2%
7PHILLIPS 664.46%58.6%
8DIAMONDBACK ENERGY, INC.4.29%62.9%
9DEVON ENERGY CORPORATION4.25%67.2%
10EXPAND ENERGY CORPORATION4.10%71.3%
11OVINTIV INC.2.73%74.0%
12PERMIAN RESOURCES CORPORATION2.73%76.7%
13APA CORPORATION2.17%78.9%
14HF SINCLAIR CORPORATION2.01%80.9%
15ANTERO RESOURCES CORPORATION1.95%82.8%

Returns the fund reported

2019-07 – 2026-06

Monthly total returns from Item B.5 of IEO's own filings, 84 months on record. Not computed here and not from a price feed.

26.8%Last twelve months filed
142%Whole series, compounded
47.2%Best month
-42.6%Worst month

Cross-checked against a series computed separately from prices: median difference — percentage points over 0 months, which is roughly the distributions. Every month with the filing it came from: IEO.json · all funds.

Who borrows IEO's shares

2026-06-30

The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-06-30, $18m was out to 4 borrowers, 3.46% of net assets. The largest, JP MORGAN SECURITIES LLC, held 71.6% of it.

BorrowerOn loanShare of the loan
JP MORGAN SECURITIES LLC $13m 71.6%
BofA Securities, Inc. $4m 22.5%
BNP PARIBAS PRIME BROKERAGE INTERNATIONAL LIMITED $1m 5.9%
CITIGROUP GLOBAL MARKETS INC. $129 0.0%

Cash collateral reported against the loan: 3.39% of net assets, 98.1% of the amount lent. That is a floor on the collateral, not the whole of it — collateral the fund does not hold as a position is not in this filing, so a figure under 100% is not evidence of under-collateralisation. How that figure behaves across all funds. Every quarter IEO has filed, with each borrower: IEO.json · all funds.

Since the previous filing

2026-03-31 → 2026-06-30

48 positions became 47: 1 added (0.1% of the fund at the later date), 2 dropped (3.8% at the earlier date). Half the sum of all weight changes, a turnover proxy: 12.8%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of IEO compared this way, as a feed: changes.xml · all funds: filings received.

Largest increases2026-03-312026-06-30Largest decreases2026-03-312026-06-30
MARATHON PETROLEUM CORPORATION4.43%10.17% EOG RESOURCES, INC.9.44%6.56%
VALERO ENERGY CORPORATION9.07%10.54% PHILLIPS 667.29%4.46%
TEXAS PACIFIC LAND CORPORATION3.72%4.77% CONOCOPHILLIPS19.46%17.26%
EQT CORPORATION4.10%4.84% DIAMONDBACK ENERGY, INC.4.80%4.29%
HF SINCLAIR CORPORATION1.40%2.01% DEVON ENERGY CORPORATION4.47%4.25%
PERMIAN RESOURCES CORPORATION2.26%2.73% SABLE OFFSHORE CORP.0.29%0.08%

New: DIVERSIFIED ENERGY COMPANY (0.15%). Gone: COTERRA ENERGY INC. (3.82%), XAE ENERGY JUN26 (0.00%).

Asset categories and pricing

as of 2026-06-30

96.63% equity, 3.37% short-term investment as filed; 100.0% carried at a quoted market price (fair-value level 1). Categories and levels are the filer's; what a low level-1 share does and does not mean is in the measure's page.

Derivative exposure and counterparties

as of 2026-06-30

A position count cannot describe a fund that uses derivatives, because a swap is filed at its unrealised gain, not its exposure. These are the notionals the fund itself reported, against net assets of $516M. Notional of an interest-rate or currency swap is not equity exposure.

99.9%Stocks held directly
0%Swap notional (0)
0.09%Futures notional (1)
100%Sum, % of net assets

Full detail for every fund that files derivatives: leverage.json (CC BY 4.0).

Neighbours by effective holdings, equity funds

10

Every measured equity fund lined up by how many holdings it behaves like; these sit either side of IEO (13.9). Same filings, same arithmetic. Position in this list says nothing about which fund is better.

FundReportsBehaves likeTop tenAs of
URA Global X Uranium ETF 66 13.1 63.33% 2026-07-31
LSGR Natixis Loomis Sayles Focused Growth ETF 22 13.2 73.33% 2026-06-30
FTEC Fidelity MSCI Information Technology Index ETF 282 13.4 62.26% 2026-07-31
TOPT iShares Top 20 U.S. Stocks ETF 23 13.8 69.28% 2026-06-30
SMH VanEck Semiconductor ETF 25 13.9 70.27% 2026-06-30
EWL iShares MSCI Switzerland ETF 45 14.1 68.01% 2026-05-31
IAT iShares U.S. Regional Banks ETF 33 14.1 69.48% 2026-06-30
EPOL iShares MSCI Poland ETF 37 14.2 67.97% 2026-05-31
EWM iShares MSCI Malaysia ETF 30 14.2 68.97% 2026-05-31
UPRO ProShares UltraPro S&P500 523 14.3 * 51.33% 2026-05-31

Essays that examine IEO

0

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