Which returned more over the last year, IWB or SEIM?

In the year to Oct 9, 2026, with distributions reinvested, IWB returned +16.6% and SEIM +22.3%.

Which is cheaper, IWB or SEIM?

Neither: IWB and SEIM both charge 0.15% a year. Fees come from each fund's prospectus.

How much do IWB and SEIM overlap with the S&P 500?

By their latest filed holdings, 92% of IWB and 89% of SEIM by weight is stocks the S&P 500 already holds.

Compare their flows Ask IQ about these two funds

IWB vs SEIM: Differences, Returns & Fees

IWB and SEIM hold 27% of their weight in the same names, and SEIM returned +22.3% over the year. Net assets: $49.6bn on Oct 9, 2026 for iShares Russell 1000 ETF, and $1.5bn on Jun 30, 2026 for SEI Enhanced U.S. Large Cap Momentum Factor ETF.

Both cost 0.15% a year; their one-year returns differ by 5.7 points; IWB is far larger, $48.3bn against $1.5bn.

Points (pts) are percentage points.

	IWB	SEIM
Expense ratio	0.15%	0.15%
Net assets, as of Jun 30, 2026	$48.3bn	$1.5bn
Total return, 1 year	+16.6%	+22.3%
What it tracks	Russell 1000 Index	No index, actively managed
Holdings in common	27%
Top ten holdings, share of the fund	36.1%	37.6%

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

+16.6%

IWB total return, 1 year

+22.3%

SEIM total return, 1 year

0.15%

IWB expense ratio

0.15%

SEIM expense ratio

What they hold in common

By the books each fund has filed, IWB and SEIM hold 27% 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.

50%

half

27% in common

Positions both hold, largest shared weight first

Holding IWB SEIM

NVIDIA 7.44% 6.24%

APPLE 6.77% 2.90%

ALPHABET CLASS A 2.85% 7.00%

MICROSOFT 5.53% 2.66%

MICRON TECHNOLOGY 1.61% 2.98%

AMAZON.COM INC 3.54% 1.05%

VISA CLASS A 0.91% 2.84%

JOHNSON & JOHNSON 0.88% 2.48%

WALMART 0.68% 0.69%

CISCO SYSTEMS INC 0.65% 1.81%

PALANTIR TECHNOLOGIES CLASS A 0.65% 0.72%

BROADCOM INC 2.34% 0.55%

Only in IWB

META PLATFORMS CLASS A 2.20%

TESLA INC 1.56%

ADVANCED MICRO DEVICES 1.38%

BERKSHIRE HATHAWAY INC CLASS B 1.34%

ELI LILLY 1.31%

JPMORGAN CHASE & CO 1.24%

EXXONMOBIL HOLDINGS CORP 0.97%

INTEL CORPORATION 0.67%

Only in SEIM

APPLIED MATERIALS, INC. 3.37%

NVENT ELECTRIC PUBLIC LIMITED COMPANY 1.77%

THE HERSHEY COMPANY 1.61%

INTERACTIVE BROKERS GROUP, INC. 0.56%

Samsara Inc (Pre-Reincorporation) 0.33%

Check overlap with more funds →

On the same fields

IWB

iShares Russell 1000 ETF

SEIM

SEI Enhanced U.S. Large Cap Momentum Factor ETF

Where it sits Stock ETF Stock ETF

Issuer iShares SEI

What it is Tracks the Russell 1000 Actively managed

Total return, 1 year +16.6% +22.3%

S&P 500 over the same days +17.3% +17.3%

Gap to the S&P 500 −0.6 pts +5.0 pts

Expense ratio 0.15% 0.15%

Already in the S&P 500 91.7% 89.4%

Holdings 1025 71

Net assets, IWB as of Oct 9, 2026 and SEIM as of Jun 30, 2026 $49.6bn $1.5bn

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

IWB in plain words

IWB tracks the Russell 1000. Over the year to Oct 9, 2026 it returned +16.6% with distributions reinvested, against +17.3% for the S&P 500. 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%.

SEIM in plain words

SEIM is actively managed and tracks no index. Over the year to Oct 9, 2026 it returned +22.3% with distributions reinvested, against +17.3% for the S&P 500. By its holdings filed for Jun 30, 2026, 89% of the fund by weight is stocks the S&P 500 also holds, across 71 positions, with the top ten at 37.6%.

Questions people ask

Which returned more over the last year, IWB or SEIM?: In the year to Oct 9, 2026, with distributions reinvested, IWB returned +16.6% and SEIM +22.3%.
Which is cheaper, IWB or SEIM?: Neither: IWB and SEIM both charge 0.15% a year. Fees come from each fund's prospectus.
How much do IWB and SEIM overlap with the S&P 500?: By their latest filed holdings, 92% of IWB and 89% of SEIM by weight is stocks the S&P 500 already holds.

Other comparisons

IWB vs TDVG AVLC vs IWB IWB vs SUSL IWB vs LCTU QUAL vs SEIM SCHB vs SEIM RDVY vs SEIM SEIM vs USMV

IWB on its own →SEIM 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 ↗SEIM filings on SEC EDGAR ↗SEIM prospectus with the expense ratio (SEC) ↗SEI 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, IWB against SEIM, data as of Oct 9, 2026. https://etfiq.com/compare/any/iwb-vs-seim

Open data

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