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OEF vs USMC: Differences, Returns & Fees

OEF and USMC hold 53% of their weight in the same names, and OEF returned +16.8% over the year. Net assets: $20.8bn on Oct 9, 2026 for iShares S&P 100 ETF, and $5.2bn on Oct 8, 2026 for Principal U.S. Mega-Cap ETF.

USMC costs 0.08 points a year less; their one-year returns differ by 2.0 points; OEF is 4.0 times larger.

OEF vs USMC: Differences, Returns & Fees
OEFUSMC
Expense ratio0.20%0.12%
Net assets, as of Oct 8, 2026$20.7bn$5.2bn
Total return, 1 year+16.8%+14.8%
What it tracksS&P 100No index, actively managed
Holdings in common53%
Top ten holdings, share of the fund52.6%54.3%

Holdings in common uses holdings dated Jun 30, 2026 and Oct 9, 2026.

+16.8%
OEF total return, 1 year
+14.8%
USMC total return, 1 year
0.20%
OEF expense ratio
0.12%
USMC expense ratio

What they hold in common

By the books each fund has filed, OEF and USMC hold 53% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Jun 30, 2026 and Oct 9, 2026.

half

53% in common

Positions both hold, largest shared weight first
Holding OEF USMC
NVIDIA 11.11% 7.54%
APPLE 9.84% 6.63%
MICROSOFT 7.96% 4.30%
ALPHABET CLASS A 4.13% 5.80%
AMAZON.COM INC 5.16% 3.60%
BROADCOM INC 3.45% 4.77%
META PLATFORMS CLASS A 3.17% 3.51%
MICRON TECHNOLOGY 2.33% 8.75%
TESLA INC 2.16% 2.31%
BERKSHIRE HATHAWAY INC CLASS B 1.92% 3.10%
ELI LILLY 1.89% 2.52%
JPMORGAN CHASE & CO 1.77% 4.40%
Only in OEF
ALPHABET CLASS C 3.31%
ADVANCED MICRO DEVICES 1.99%
EXXONMOBIL HOLDINGS CORP 1.39%
INTEL CORPORATION 1.04%
PALANTIR TECHNOLOGIES CLASS A 0.96%
CISCO SYSTEMS INC 0.93%
APPLIED MATERIAL INC 0.81%
LAM RESEARCH 0.80%
Only in USMC
General Electric Co 3.41%
Exxon Mobil Corp 1.99%

Check overlap with more funds →

On the same fields

OEF
iShares S&P 100 ETF
USMC
Principal U.S. Mega-Cap ETF
Where it sits Stock ETF Stock ETF
Issuer iShares Principal
What it is Tracks an index Actively managed
Total return, 1 year +16.8% +14.8%
Its benchmark over the same days not published +17.3% (VOO)
Gap to its benchmark not available −2.5 pts vs VOO
Expense ratio 0.20% 0.12%
Already in the S&P 500 99.9% 99.8%
Holdings 102 26
Net assets, OEF as of Oct 9, 2026 and USMC as of Oct 8, 2026 $20.8bn $5.2bn

OEF and USMC on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.

About OEF

OEF tracks an index. Over the year to Oct 9, 2026 it returned +16.8% with distributions reinvested. The prospectus expense ratio is 0.20% a year. By its holdings published by its issuer for Oct 9, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 102 positions, with the top ten at 52.6%.

About USMC

USMC is actively managed and tracks no index. Over the year to Oct 9, 2026 it returned +14.8% with distributions reinvested, against +17.3% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.12% a year. By its holdings filed for Jun 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 26 positions, with the top ten at 54.3%.

Questions people ask

Which returned more over the last year, OEF or USMC?
In the year to Oct 9, 2026, with distributions reinvested, OEF returned +16.8% and USMC +14.8%.
Which is cheaper, OEF or USMC?
USMC is cheaper, by 0.08 percentage points a year. That is about $8 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do OEF and USMC overlap with the S&P 500?
By their latest filed holdings, 100% of OEF and 100% of USMC by weight is stocks the S&P 500 already holds.
Other comparisons
DSI vs OEFOEF vs SCHKOEF vs USCAOEF vs THROUSMC vs USMVRDVY vs USMCDGRW vs USMCCGDV vs USMC
OEF on its own →USMC on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
OEF filings on SEC EDGAR ↗OEF prospectus with the expense ratio (SEC) ↗iShares page for OEF ↗USMC filings on SEC EDGAR ↗USMC prospectus with the expense ratio (SEC) ↗Principal website ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

Cite this pageCitation, APA and Markdown

ETFIQ, OEF against USMC, data as of Oct 9, 2026. https://etfiq.com/compare/any/oef-vs-usmc

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.