Do POWR and TRFM hold the same stocks?

By their latest filings, 8% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.

Which is more different from the S&P 500, POWR or TRFM?

POWR has 80% of its weight in S&P 500 names and TRFM has 47%, so POWR differs more from the index.

Which is cheaper, POWR or TRFM?

POWR charges 0.39% a year and TRFM charges 0.49%, so POWR is cheaper. Fees come from each fund's prospectus.

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POWR vs TRFM: which is really different?

POWR and TRFM hold 8% of their weight in the same names, and TRFM returned +22.2% over the year. iShares U.S. Power Infrastructure ETF and AAM Transformers ETF.

80.5%

POWR in the S&P 500

46.8%

TRFM in the S&P 500

+2.8%

POWR total return, 1 year

+22.2%

TRFM total return, 1 year

POWR · 1 year to Sep 30, 202620% of its weight is outside the S&P 500

81% of POWR's weight is in S&P 500 companies and 20% is outside the index

TRFM · 1 year to Sep 30, 202653% of its weight is outside the S&P 500

47% of TRFM's weight is in S&P 500 companies and 53% is outside the index

ETFIQ Off-Index Score · POWR scores higherHow much of it is not the index it is sold as an alternative to?

POWR 39.6

TRFM 9.6

0.1, the lowest in this set92.0, the highest

A percentile among the 375 thematic ETFs with a holdings filing. It is a position in a set, not a rating, and neither end of it is a recommendation. All thematic ETFs ranked by it → How it is computed →

What they hold in common

By the books each fund has filed, POWR and TRFM hold 8% 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 Apr 30, 2026 and Sep 30, 2026.

50%

half

8% in common

Positions both hold, largest shared weight first

Holding POWR TRFM

GE VERNOVA 6.34% 0.85%

NEXTERA ENERGY 5.81% 0.67%

ENTERGY CORP 1.95% 0.61%

AMERICAN ELECTRIC POWER INC 2.72% 0.56%

NRG ENERGY INC 0.85% 0.55%

XCEL ENERGY INC 1.86% 0.55%

VISTRA 1.84% 0.54%

SOUTHERN 4.02% 0.54%

CONSTELLATION ENERGY CORP 3.53% 0.53%

DUKE ENERGY CORP 3.75% 0.53%

EATON PLC 6.56% 0.43%

NVENT ELECTRIC PLC 3.81% 0.35%

Only in POWR

QUANTA SERVICES INC 6.50%

EQT 4.45%

HUBBELL INC 3.51%

EXPAND ENERGY 2.85%

DOMINION ENERGY 2.24%

EXELON CORP 1.76%

CONSOLIDATED EDISON 1.59%

ANTERO RESOURCES 1.50%

Only in TRFM

Advanced Micro Devices Inc 1.14%

Bloom Energy Corp 1.14%

Sandisk Corp/DE 1.13%

Seagate Technology Holdings PL 1.03%

Marvell Technology Inc 1.00%

Ciena Corp 0.97%

Western Digital Corp 0.96%

Texas Instruments Inc 0.90%

Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed.

8% of the two portfolios are the same securities at the same weight.

Performance, window by window

	Total return		vs the S&P 500		vs the Nasdaq-100
Window	POWR	TRFM	POWR	TRFM	POWR	TRFM
3 months	−11.1%	−5.0%	−13.6 pts	−7.5 pts	−13.2 pts	−7.2 pts
6 months	−7.6%	+24.8%	−24.6 pts	+7.8 pts	−34.5 pts	−2.1 pts
1 year	+2.8%	+22.2%	−12.9 pts	+6.5 pts	−20.9 pts	−1.6 pts
3 years	+8.7%	+119.6%	−76.3 pts	+34.6 pts	−101.3 pts	+9.6 pts
Since launch POWR Feb 2012 · TRFM Jul 2022	+64.8%	+150.8%	−577.6 pts	+39.0 pts	−1207.1 pts	−14.3 pts

POWR and TRFM over each window. Every figure is an ETFIQ calculation with distributions reinvested. Source: ETFIQ. Open the live comparison on ETFIQ →

On the same fields

POWR

iShares U.S. Power Infrastructure ETF · Holds 82 stocks in electrification and the grid, 80% of its weight in S&P 500 companies

TRFM

AAM Transformers ETF · Holds 310 stocks in electrification and the grid, 47% of its weight in S&P 500 companies

Issuer iShares AAM

Theme Electrification and the grid Electrification and the grid

In the S&P 500 80.5% 46.8%

Active share vs the S&P 500 96.9% 79.2%

In the Nasdaq-100 9.9% 27.5%

Holdings 82 310

Top ten, share of the fund 48.3% 8.1%

Expense ratio 0.39% 0.49%

Fee for the differing part 0.40% 0.62%

Total return, 1 year +2.8% +22.2%

vs the S&P 500 −12.9 pts +6.5 pts

vs the Nasdaq-100 −20.9 pts −1.6 pts

Below its high −13.8% −6.4%

Net assets $426m $248m

POWR and TRFM on the same fields, as of Sep 30, 2026. Source: ETFIQ.

POWR in plain words

By weight, 80% of POWR's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 97%. The top ten holdings are 48% of the fund across 82 positions, as published by its issuer for Sep 30, 2026. Over the year to Sep 30, 2026 the fund returned +2.8% with distributions reinvested against +15.7% for the S&P 500, so a holder was behind by 12.9 pts. It sits 13.8% below its all-time high of May 5, 2026.

TRFM in plain words

By weight, 47% of TRFM's portfolio is stocks that are also in the S&P 500; its active share against the S&P 500 is 79%. The top ten holdings are 8% of the fund across 310 positions, as filed for Apr 30, 2026. Over the year to Sep 30, 2026 the fund returned +22.2% with distributions reinvested against +15.7% for the S&P 500, so a holder was ahead by 6.5 pts. It sits 6.4% below its all-time high of Jun 30, 2026.

Questions people ask

Do POWR and TRFM hold the same stocks?: By their latest filings, 8% of their books are the same securities at the same weight, which is mostly different names. Overlap is the sum of the smaller weight of every security they share.
Which is more different from the S&P 500, POWR or TRFM?: POWR has 80% of its weight in S&P 500 names and TRFM has 47%, so POWR differs more from the index.
Which is cheaper, POWR or TRFM?: POWR charges 0.39% a year and TRFM charges 0.49%, so POWR is cheaper. Fees come from each fund's prospectus.

Other comparisons

POWR vs COPA POWR vs COPJ POWR vs COPP POWR vs COPX TRFM vs COPA TRFM vs COPJ TRFM vs COPP TRFM vs COPX

POWR on its own →TRFM on its own →How every figure is computed →Standards and sources →

Where these figures came from

POWR filings on SEC EDGAR ↗POWR prospectus with the expense ratio (SEC) ↗iShares page for POWR ↗TRFM filings on SEC EDGAR ↗TRFM prospectus with the expense ratio (SEC) ↗AAM website ↗

ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement. A comparison is not a recommendation.

Cite this page

ETFIQ, POWR against TRFM, data as of Sep 30, 2026. https://etfiq.com/compare/themes/powr-vs-trfm

Open data

Free to use with attribution. Every figure is calculated from a named public source; the method is at etfiq.com/methodology.