COWG vs IWR: Differences, Returns & Fees

COWG and IWR hold 10% of their weight in the same names, and IWR returned +15.1% over the year. Net assets: $2.4bn on Oct 2, 2026 for Pacer US Large Cap Cash Cows Growth Leaders ETF, and $57.0bn on Oct 20, 2026 for iShares Russell Mid-Cap ETF.

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Answers cite the figures on this page.

IWR costs 0.31 points a year less; their one-year returns differ by 2.9 points; IWR is far larger, $55.8bn against $2.4bn.

COWG vs IWR: Differences, Returns & Fees
COWGIWR
Expense ratio0.49%0.18%
Net assets, as of Oct 2, 2026$2.4bn$55.8bn
Total return, 1 year+12.2%+15.1%
What it tracksPacer US Large Cap Cash Cows Growth Leaders IndexRussell Midcap Index
Holdings in common10%
Top ten holdings, share of the fund28.4%6.8%
Below its high3.5%, high on Oct 9, 20264.3%, high on Aug 14, 2026

Holdings in common uses holdings dated Jul 31, 2026 and Oct 19, 2026.

+12.2%
COWG total return, 1 year
+15.1%
IWR total return, 1 year
0.49%
COWG expense ratio
0.18%
IWR expense ratio

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Client brief · page 1 of 2Report BR-2768DC2035

COWG and IWR are built for the same job. How do they differ in cost, holdings and results?

  1. What each follows. COWG follows Pacer US Large Cap Cash Cows Growth Leaders Index and IWR follows Russell Midcap Index.
  2. Holdings in common. 10% of the weight is in the same securities (holdings dated Jul 31, 2026 and Oct 19, 2026).
  3. One-year total return. Over 1 year to Oct 20, 2026 COWG returned +12.2% and IWR +15.1% with distributions reinvested, a gap of 2.9 points.

Data as of Oct 20, 2026. The differences are picked by a fixed rule, in a fixed order; the PDF prints it. Page 2 has the returns, overlap, risks and sources.

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What they hold in common

By the books each fund has filed, COWG and IWR hold 10% of their money in the same securities at the same weight. Holdings dated Jul 31, 2026 and Oct 19, 2026.

half

10% in common

Positions both hold, largest shared weight first
Holding COWG IWR
Datadog Inc 2.05% 0.64%
Autodesk Inc 0.49% 0.38%
Veeva Systems Inc 0.54% 0.35%
Anglogold Ashanti Plc 0.89% 0.34%
Astera Labs Inc 3.03% 0.33%
IDEXX Laboratories Inc 0.47% 0.33%
Diamondback Energy Inc 1.26% 0.31%
NetApp Inc 1.95% 0.30%
Workday Inc 0.48% 0.29%
Roper Technologies Inc 0.54% 0.28%
Paychex Inc 0.65% 0.27%
Biogen Inc 0.87% 0.26%
Only in COWG
Western Digital Corp 4.53%
Sandisk Corp 3.32%
Lam Research Corp 2.71%
Fortinet Inc 2.36%
Palo Alto Networks Inc 2.03%
KLA Corp 1.87%
Crowdstrike Holdings Inc 1.78%
Southern Copper Corp 1.68%
Only in IWR
MARATHON PETROLEUM 1.04%
PHILLIPS 66 0.87%
SNOWFLAKE 0.79%
CLOUDFLARE CLASS A 0.71%
MODERNA 0.61%
HEWLETT PACKARD ENTERPRISE 0.55%
ROBINHOOD MARKETS CLASS A 0.55%
ROYAL CARIBBEAN GROUP 0.53%

Check overlap with more funds →

On the same fields

COWG
Pacer US Large Cap Cash Cows Growth Leaders ETF
IWR
iShares Russell Mid-Cap ETF
Where it sits Stock ETF Stock ETF
Issuer Pacer iShares
What it is Tracks an index Tracks an index
Total return, 1 year +12.2% +15.1%
Its benchmark over the same days +15.1% (IWB) +15.0% (IWV)
Gap to its benchmark −2.8 pts vs IWB +0.1 pts vs IWV
Expense ratio 0.49% 0.18%
Already in the S&P 500 65.3% 61.6%
Holdings 100 825
Net assets, COWG as of Oct 2, 2026 and IWR as of Oct 20, 2026 $2.4bn $57.0bn

COWG and IWR on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.

About COWG

COWG tracks an index. The prospectus expense ratio is 0.49% a year. By its holdings filed for Jul 31, 2026, 65% of the fund by weight is stocks the S&P 500 also holds, across 100 positions, with the top ten at 28.4%. It sat 3.5% below its high of Oct 9, 2026 on Oct 20, 2026.

Over the year to Oct 20, 2026 it returned +12.2% with distributions reinvested, against +15.1% for its benchmark, the Russell 1000 Index.

About IWR

IWR tracks an index. The prospectus expense ratio is 0.18% a year. By its holdings published by its issuer for Oct 19, 2026, 62% of the fund by weight is stocks the S&P 500 also holds, across 825 positions, with the top ten at 6.8%. It sat 4.3% below its high of Aug 14, 2026 on Oct 20, 2026.

Over the year to Oct 20, 2026 it returned +15.1% with distributions reinvested, against +15.0% for its benchmark, the Russell 3000 Index.

Questions people ask

Which returned more over the last year, COWG or IWR?
In the year to Oct 20, 2026, with distributions reinvested, COWG returned +12.2% and IWR +15.1%.
Which is cheaper, COWG or IWR?
IWR is cheaper, by 0.31 percentage points a year. That is about $31 on $10,000 held for a year. Fees come from each fund's prospectus.
How much do COWG and IWR overlap with the S&P 500?
By their latest filed holdings, 65% of COWG and 62% of IWR by weight is stocks the S&P 500 already holds.
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ETFIQ, COWG against IWR, data as of Oct 20, 2026. https://etfiq.com/compare/any/cowg-vs-iwr

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