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THRO vs VOO: Differences, Returns & Fees

THRO and VOO hold 65% of their weight in the same names, and THRO returned +18.3% over the year. Net assets: $7.5bn on Oct 9, 2026 for iShares U.S. Thematic Rotation Active ETF, and $1.0tn on Sep 30, 2026 for Vanguard S&P 500 ETF.

VOO costs 0.54 points a year less; their one-year returns differ by 1.0 point; VOO is far larger, $1.0tn against $6.8bn.

THRO vs VOO: Differences, Returns & Fees
THROVOO
Expense ratio0.57%0.03%
Net assets, as of Sep 30, 2026$6.8bn$1.0tn
Total return, 1 year+18.3%+17.3%
What it tracksNo index, actively managedS&P 500 Index
Holdings in common65%
Top ten holdings, share of the fund43.5%37.8%

Holdings in common uses holdings dated Aug 31, 2026 and Oct 9, 2026.

+18.3%
THRO total return, 1 year
+17.3%
VOO total return, 1 year
0.57%
THRO expense ratio
0.03%
VOO expense ratio

What they hold in common

By the books each fund has filed, THRO and VOO hold 65% 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 Aug 31, 2026 and Oct 9, 2026.

half

65% in common

Positions both hold, largest shared weight first
Holding THRO VOO
NVIDIA 8.35% 8.09%
APPLE 8.22% 7.04%
MICROSOFT 6.41% 5.70%
AMAZON.COM INC 4.63% 3.85%
ALPHABET CLASS A 3.85% 3.01%
BROADCOM INC 2.13% 2.65%
META PLATFORMS CLASS A 1.93% 1.90%
ALPHABET CLASS C 1.90% 2.40%
MICRON TECHNOLOGY 2.48% 1.64%
JPMORGAN CHASE & CO 2.57% 1.44%
TESLA INC 1.39% 1.57%
ADVANCED MICRO DEVICES 1.90% 1.16%
Only in THRO
CHECK POINT SOFTWARE TECHNOLOGIES 0.65%
MUELLER INDUSTRIES INC 0.25%
SS AND C TECHNOLOGIES HOLDINGS 0.23%
CHENIERE ENERGY 0.19%
ALCOA CORP 0.17%
HF SINCLAIR 0.16%
PERMIAN RESOURCES CLASS A 0.11%
TD SYNNEX 0.11%
Only in VOO
Mastercard Inc 0.72%
AbbVie Inc 0.69%
General Electric Co 0.53%
Netflix Inc 0.52%
Wells Fargo & Co 0.40%
Amgen Inc 0.35%
Linde PLC 0.34%
Abbott Laboratories 0.29%

Check overlap with more funds →

On the same fields

THRO
iShares U.S. Thematic Rotation Active ETF
VOO
Vanguard S&P 500 ETF
Where it sits Stock ETF Stock ETF
Issuer iShares Vanguard
What it is Actively managed Tracks the S&P 500
Total return, 1 year +18.3% +17.3%
Its benchmark over the same days +17.3% (VOO) +17.3% (IVV)
Gap to its benchmark +1.0 pts vs VOO 0.0 pts vs IVV
Expense ratio 0.57% 0.03%
Already in the S&P 500 92.8% 99.7%
Holdings 247 507
Net assets, THRO as of Oct 9, 2026 and VOO as of Sep 30, 2026 $7.5bn $1.0tn

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

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%.

About VOO

VOO tracks the S&P 500. Over the year to Oct 9, 2026 it returned +17.3% with distributions reinvested, against +17.3% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Aug 31, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 507 positions, with the top ten at 37.8%.

Questions people ask

Which returned more over the last year, THRO or VOO?
In the year to Oct 9, 2026, with distributions reinvested, THRO returned +18.3% and VOO +17.3%.
Which is cheaper, THRO or VOO?
VOO is cheaper, by 0.54 percentage points a year. That is about $54 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do THRO and VOO overlap with the S&P 500?
By their latest filed holdings, 93% of THRO and 100% of VOO by weight is stocks the S&P 500 already holds.
Other comparisons
IVV vs THROSPY vs THROTHRO vs VTITHRO vs VIGCGUS vs VOODFAU vs VOOESGV vs VOOAVUS vs VOO
THRO on its own →VOO on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
THRO filings on SEC EDGAR ↗THRO prospectus with the expense ratio (SEC) ↗iShares page for THRO ↗VOO filings on SEC EDGAR ↗VOO prospectus with the expense ratio (SEC) ↗Vanguard page for VOO ↗

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

Open data

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