A
vs
B
Share
Compare their flowsAsk IQ about these two funds

SEIM vs SPY: Differences, Returns & Fees

SEIM and SPY hold 29% of their weight in the same names, and SEIM returned +22.3% over the year. Net assets: $1.5bn on Jun 30, 2026 for SEI Enhanced U.S. Large Cap Momentum Factor ETF, and $817.2bn on Oct 8, 2026 for SPDR S&P 500 ETF Trust.

SPY costs 0.06 points a year less; their one-year returns differ by 5.0 points; SPY is far larger, $781.2bn against $1.5bn.

SEIMSPY
Expense ratio0.15%0.09%
Net assets, as of Jun 30, 2026$1.5bn$781.2bn
Total return, 1 year+22.3%+17.3%
What it tracksNo index, actively managedS&P 500 Index
Holdings in common29%
Top ten holdings, share of the fund37.6%39.1%

Holdings in common uses holdings dated Jun 30, 2026 and Oct 8, 2026.

+22.3%
SEIM total return, 1 year
+17.3%
SPY total return, 1 year
0.15%
SEIM expense ratio
0.09%
SPY expense ratio

What they hold in common

By the books each fund has filed, SEIM and SPY hold 29% 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 8, 2026.

half

29% in common

Positions both hold, largest shared weight first
Holding SEIM SPY
NVIDIA CORPORATION 6.24% 8.34%
ALPHABET INC. 7.00% 3.06%
APPLE INC. 2.90% 7.42%
MICROSOFT CORPORATION 2.66% 5.80%
MICRON TECHNOLOGY, INC. 2.98% 1.75%
AMAZON.COM, INC. 1.05% 3.73%
VISA INC. 2.84% 0.96%
JOHNSON & JOHNSON 2.48% 0.92%
WALMART INC. 0.69% 0.74%
PALANTIR TECHNOLOGIES INC. 0.72% 0.68%
CISCO SYSTEMS, INC. 1.81% 0.68%
APPLIED MATERIALS, INC. 3.37% 0.60%
Only in SEIM
NVENT ELECTRIC PUBLIC LIMITED COMPANY 1.77%
WOODWARD, INC. 1.70%
TD SYNNEX CORPORATION 1.40%
ITT INC. 1.18%
CURTISS-WRIGHT CORPORATION 0.94%
MASTEC, INC. 0.73%
FIVE BELOW, INC. 0.65%
Astera Labs, Inc 0.62%
Only in SPY
META PLATFORMS INC CLASS A 2.38%
TESLA INC 1.58%
ADVANCED MICRO DEVICES 1.51%
BERKSHIRE HATHAWAY INC CL B 1.42%
ELI LILLY + CO 1.40%
JPMORGAN CHASE + CO 1.32%
EXXONMOBIL HOLDINGS CORP 1.04%
INTEL CORP 0.80%

Check overlap with more funds →

On the same fields

SEIM
SEI Enhanced U.S. Large Cap Momentum Factor ETF
SPY
SPDR S&P 500 ETF Trust
Where it sits Stock ETF Stock ETF
Issuer SEI State Street
What it is Actively managed Tracks the S&P 500
Total return, 1 year +22.3% +17.3%
S&P 500 over the same days +17.3% +17.3%
Gap to the S&P 500 +5.0 pts 0.0 pts
Expense ratio 0.15% 0.09%
Already in the S&P 500 89.4% 99.8%
Holdings 71 504
Net assets, SEIM as of Jun 30, 2026 and SPY as of Oct 8, 2026 $1.5bn $817.2bn

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

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. The prospectus expense ratio is 0.15% a year. 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%.

SPY in plain words

SPY 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 0.09% a year. By its holdings published by its issuer for Oct 8, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 504 positions, with the top ten at 39.1%.

Questions people ask

Which returned more over the last year, SEIM or SPY?
In the year to Oct 9, 2026, with distributions reinvested, SEIM returned +22.3% and SPY +17.3%.
Which is cheaper, SEIM or SPY?
SPY is cheaper, by 0.06 percentage points a year. That is about $6 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do SEIM and SPY overlap with the S&P 500?
By their latest filed holdings, 89% of SEIM and 100% of SPY by weight is stocks the S&P 500 already holds.
Other comparisons
IVV vs SEIMSEIM vs VTISEIM vs VOOSEIM vs SPYMDFAL vs SPYCATH vs SPYFDLO vs SPYSPY vs TDVG
SEIM on its own →SPY on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
SEIM filings on SEC EDGAR ↗SEIM prospectus with the expense ratio (SEC) ↗SEI website ↗SPY filings on SEC EDGAR ↗State Street 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, SEIM against SPY, data as of Oct 9, 2026. https://etfiq.com/compare/any/seim-vs-spy

Open data

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