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IWB vs THRO: Differences, Returns & Fees

IWB and THRO hold 62% of their weight in the same names, and THRO returned +18.3% over the year. Net assets on Oct 9, 2026: $49.6bn for iShares Russell 1000 ETF and $7.5bn for iShares U.S. Thematic Rotation Active ETF.

IWB costs 0.42 points a year less; their one-year returns differ by 1.7 points; IWB is 6.6 times larger.

IWB vs THRO: Differences, Returns & Fees
IWBTHRO
Expense ratio0.15%0.57%
Net assets$49.6bn$7.5bn
Total return, 1 year+16.6%+18.3%
What it tracksRussell 1000 IndexNo index, actively managed
Holdings in common62%
Top ten holdings, share of the fund36.1%43.5%

Holdings in common uses holdings dated Oct 9, 2026.

+16.6%
IWB total return, 1 year
+18.3%
THRO total return, 1 year
0.15%
IWB expense ratio
0.57%
THRO expense ratio

What they hold in common

By the books each fund has filed, IWB and THRO hold 62% 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

62% in common

Positions both hold, largest shared weight first
Holding IWB THRO
NVIDIA 7.44% 8.35%
APPLE 6.77% 8.22%
MICROSOFT 5.53% 6.41%
AMAZON.COM INC 3.54% 4.63%
ALPHABET CLASS A 2.85% 3.85%
BROADCOM INC 2.34% 2.13%
META PLATFORMS CLASS A 2.20% 1.93%
ALPHABET CLASS C 2.30% 1.90%
MICRON TECHNOLOGY 1.61% 2.48%
TESLA INC 1.56% 1.39%
ADVANCED MICRO DEVICES 1.38% 1.90%
JPMORGAN CHASE & CO 1.24% 2.57%
Only in IWB
ABBVIE 0.68%
MASTERCARD CLASS A 0.66%
GE AEROSPACE 0.44%
NETFLIX 0.41%
WELLS FARGO 0.35%
AMGEN INC 0.31%
LINDE PLC 0.31%
ANALOG DEVICES 0.28%
Only in THRO
CHECK POINT SOFTWARE TECHNOLOGIES 0.65%
SEAGATE TECHNOLOGY HOLDINGS PLC 0.27%
SILICON LABORATORIES 0.06%
TIDEWATER 0.05%
PBF ENERGY CLASS A 0.03%
TE CONNECTIVITY PLC 0.03%
ACI WORLDWIDE 0.00%
BOX INC CLASS A 0.00%

Check overlap with more funds →

On the same fields

IWB
iShares Russell 1000 ETF
THRO
iShares U.S. Thematic Rotation Active ETF
Where it sits Stock ETF Stock ETF
Issuer iShares iShares
What it is Tracks the Russell 1000 Actively managed
Total return, 1 year +16.6% +18.3%
Its benchmark over the same days +16.8% (VONE) +17.3% (VOO)
Gap to its benchmark −0.1 pts vs VONE +1.0 pts vs VOO
Expense ratio 0.15% 0.57%
Already in the S&P 500 91.7% 92.8%
Holdings 1025 247
Net assets $49.6bn $7.5bn

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

About IWB

IWB tracks the Russell 1000. Over the year to Oct 9, 2026 it returned +16.6% with distributions reinvested, against +16.8% for its benchmark, the Russell 1000 Index. The prospectus expense ratio is 0.15% a year. By its holdings published by its issuer for Oct 9, 2026, 92% of the fund by weight is stocks the S&P 500 also holds, across 1,025 positions, with the top ten at 36.1%.

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, IWB or THRO?
In the year to Oct 9, 2026, with distributions reinvested, IWB returned +16.6% and THRO +18.3%.
Which is cheaper, IWB or THRO?
IWB is cheaper, by 0.42 percentage points a year. That is about $42 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do IWB and THRO overlap with the S&P 500?
By their latest filed holdings, 92% of IWB and 93% of THRO by weight is stocks the S&P 500 already holds.
Other comparisons
IWB vs TCAFIWB vs RECSBLCR vs IWBIWB vs SCHKQUAL vs THROSCHB vs THRORDVY vs THROTHRO vs USMV
IWB on its own →THRO on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
IWB filings on SEC EDGAR ↗IWB prospectus with the expense ratio (SEC) ↗iShares page for IWB ↗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, IWB against THRO, data as of Oct 9, 2026. https://etfiq.com/compare/any/iwb-vs-thro

Open data

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