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OEF vs THRO: Differences, Returns & Fees

OEF and THRO hold 69% of their weight in the same names, and THRO returned +18.3% over the year. Net assets on Oct 9, 2026: $20.8bn for iShares S&P 100 ETF and $7.5bn for iShares U.S. Thematic Rotation Active ETF.

OEF costs 0.37 points a year less; their one-year returns differ by 1.5 points; OEF is 2.8 times larger.

OEF vs THRO: Differences, Returns & Fees
OEFTHRO
Expense ratio0.20%0.57%
Net assets$20.8bn$7.5bn
Total return, 1 year+16.8%+18.3%
What it tracksS&P 100No index, actively managed
Holdings in common69%
Top ten holdings, share of the fund52.6%43.5%

Holdings in common uses holdings dated Oct 9, 2026.

+16.8%
OEF total return, 1 year
+18.3%
THRO total return, 1 year
0.20%
OEF expense ratio
0.57%
THRO expense ratio

What they hold in common

By the books each fund has filed, OEF and THRO hold 69% 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 Oct 9, 2026.

half

69% in common

Positions both hold, largest shared weight first
Holding OEF THRO
NVIDIA 11.11% 8.35%
APPLE 9.84% 8.22%
MICROSOFT 7.96% 6.41%
AMAZON.COM INC 5.16% 4.63%
ALPHABET CLASS A 4.13% 3.85%
MICRON TECHNOLOGY 2.33% 2.48%
BROADCOM INC 3.45% 2.13%
META PLATFORMS CLASS A 3.17% 1.93%
ADVANCED MICRO DEVICES 1.99% 1.90%
ALPHABET CLASS C 3.31% 1.90%
JPMORGAN CHASE & CO 1.77% 2.57%
EXXONMOBIL HOLDINGS CORP 1.39% 2.56%
Only in OEF
ABBVIE 0.98%
MASTERCARD CLASS A 0.95%
GE AEROSPACE 0.64%
NETFLIX 0.59%
WELLS FARGO 0.51%
AMGEN INC 0.45%
LINDE PLC 0.45%
WALT DISNEY 0.37%
Only in THRO
NORTHROP GRUMMAN CORP 0.99%
CHECK POINT SOFTWARE TECHNOLOGIES 0.65%
CME GROUP CLASS A 0.46%
TJX 0.44%
KLA 0.41%
F5 0.35%
QUANTA SERVICES INC 0.34%
CROWDSTRIKE HOLDINGS CLASS A 0.30%

Check overlap with more funds →

On the same fields

OEF
iShares S&P 100 ETF
THRO
iShares U.S. Thematic Rotation Active ETF
Where it sits Stock ETF Stock ETF
Issuer iShares iShares
What it is Tracks an index Actively managed
Total return, 1 year +16.8% +18.3%
Its benchmark over the same days not published +17.3% (VOO)
Gap to its benchmark not available +1.0 pts vs VOO
Expense ratio 0.20% 0.57%
Already in the S&P 500 99.9% 92.8%
Holdings 102 247
Net assets $20.8bn $7.5bn

OEF and THRO 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 THRO

THRO is actively managed and tracks no index. Over the year to Oct 9, 2026 it returned +18.3% with distributions reinvested, against +17.3% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.57% a year. By its holdings published by its issuer for Oct 9, 2026, 93% of the fund by weight is stocks the S&P 500 also holds, across 247 positions, with the top ten at 43.5%.

Questions people ask

Which returned more over the last year, OEF or THRO?
In the year to Oct 9, 2026, with distributions reinvested, OEF returned +16.8% and THRO +18.3%.
Which is cheaper, OEF or THRO?
OEF is cheaper, by 0.37 percentage points a year. That is about $37 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do OEF and THRO overlap with the S&P 500?
By their latest filed holdings, 100% of OEF and 93% of THRO by weight is stocks the S&P 500 already holds.
Other comparisons
OEF vs TCAFBBUS vs OEFOEF vs RECSBLCR vs OEFSPMO vs THROTHRO vs USMVRDVY vs THRODGRW vs THRO
OEF on its own →THRO 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 ↗THRO filings on SEC EDGAR ↗THRO prospectus with the expense ratio (SEC) ↗iShares page for THRO ↗

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 THRO, data as of Oct 9, 2026. https://etfiq.com/compare/any/oef-vs-thro

Open data

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