ETF Pricing & Performance

*Morningstar® Ratings as of 8/31/17

Strategic Beta

Fund Name / Symbol

Principal Price Setters Index ETF ^{1,

2}

PSET

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

$ Price

$ NAV

$ Chg Price

$ Chg NAVChg NAV

% YTD (Price)YTD (Price)

29.97 29.97 29.03 29.03

29.99 29.99 29.03 29.03

-0.06 -0.06 NA NA

-0.04 -0.04 NA NA

14.96 14.96 11.35 11.35

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

1 yr

3 yr

5 yr

10 yr

Since
Incep

Incep
Date

13.23 14.19 13.22 14.21

NA NA NA NA

13.92 14.06 13.89 14.02

3/21/16

Fund Expenses

Net Expense

Gross Expense

Expense Limit Expiration

Expense Waiver Expiration

0.29

0.40

6/30/18

SEC Yield %

Benchmark

0.97

NQPRCE

Morningstar Rating

Category: Large Growth

3 yrs: N/A

1258 funds

5 yrs: N/A

1124 funds

10 yrs: N/A

790 funds

Overall: N/A

1258 funds

Fund Name / Symbol

Principal Shareholder Yield Index ETF ^{1,

2}

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

$ Price

$ NAV

$ Chg Price

$ Chg NAVChg NAV

% YTD (Price)YTD (Price)

29.77 29.77 29.14 29.14

29.77 29.77 29.16 29.16

0.01 0.01 NA NA

7.34 7.34 5.07 5.07

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

1 yr

3 yr

5 yr

10 yr

Since
Incep

Incep
Date

21.42 14.70 21.29 14.87

NA NA NA NA

15.15 13.04 15.26 13.31

3/21/16

Fund Expenses

Net Expense

Gross Expense

Expense Limit Expiration

Expense Waiver Expiration

0.29

0.40

6/30/18

SEC Yield %

Benchmark

1.77

NQSHYL

Morningstar Rating

Category: Mid-Cap Value

3 yrs: N/A

363 funds

5 yrs: N/A

318 funds

10 yrs: N/A

223 funds

Overall: N/A

363 funds

Fund Name / Symbol

Principal Healthcare Innovators Index ETF ^{1,

3,

4}

BTEC

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

$ Price

$ NAV

$ Chg Price

$ Chg NAVChg NAV

% YTD (Price)YTD (Price)

30.03 30.03 28.59 28.59

30.07 30.07 28.56 28.56

-0.19 -0.19 NA NA

30.62 30.62 24.34 24.34

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

1 yr

3 yr

5 yr

10 yr

Since
Incep

Incep
Date

NA 23.91 NA 23.81

NA NA NA NA

14.24 20.15 14.34 20.02

8/19/16

Fund Expenses

Net Expense

Gross Expense

Expense Limit Expiration

Expense Waiver Expiration

0.42

N/A

SEC Yield %

Benchmark

0.00

NQHCIN

Morningstar Rating

Category: Health

3 yrs: N/A

126 funds

5 yrs: N/A

119 funds

10 yrs: N/A

98 funds

Overall: N/A

126 funds

Fund Name / Symbol

Principal Millennials Index ETF ^{1,

5}

GENY

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

$ Price

$ NAV

$ Chg Price

$ Chg NAVChg NAV

% YTD (Price)YTD (Price)

31.64 31.64 29.03 29.03

31.40 31.40 28.92 28.92

0.14 0.14 NA NA

0.05 0.05 NA NA

27.46 27.46 16.96 16.96

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

1 yr

3 yr

5 yr

10 yr

Since
Incep

Incep
Date

NA 25.24 NA 24.76

NA NA NA NA

16.23 22.69 16.68 23.22

8/19/16

Fund Expenses

Net Expense

Gross Expense

Expense Limit Expiration

Expense Waiver Expiration

0.45

N/A

SEC Yield %

Benchmark

0.44

NQGMOI

Morningstar Rating

Category: World Large Stock

3 yrs: N/A

711 funds

5 yrs: N/A

591 funds

10 yrs: N/A

323 funds

Overall: N/A

711 funds

Fund Name / Symbol

Principal U.S. Small Cap Index ETF ⁸

PSC

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

$ Price

$ NAV

$ Chg Price

$ Chg NAVChg NAV

% YTD (Price)YTD (Price)

28.99 28.99 28.84 28.84

29.00 29.00 28.84 28.84

-0.01 -0.01 NA NA

0.00 0.00 NA NA

5.07 5.07 4.53 4.53

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

1 yr

3 yr

5 yr

10 yr

Since
Incep

Incep
Date

NA NA NA NA

16.08 14.63 16.06 14.64

9/21/16

Fund Expenses

Net Expense

Gross Expense

Expense Limit Expiration

Expense Waiver Expiration

0.38

N/A

SEC Yield %

Benchmark

0.93

NQUSSL

Morningstar Rating

Category: Small Blend

3 yrs: N/A

654 funds

5 yrs: N/A

552 funds

10 yrs: N/A

393 funds

Overall: N/A

654 funds

Disclosures

Performance data quoted represents past performance. Past performance is no guarantee of future results and investment returns, and principal value of the Fund will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. Current performance may be higher or lower than the performance quoted.

Investors should carefully consider a fund’s investment objectives, risks, charges, and expenses prior to investing.

Asset allocation and diversification do not ensure a profit or protect against a loss. Investing in ETFs involves risk, including possible loss of principal. ETFs are subject to risk similar to those of stocks, including those regarding short-selling and margin account maintenance.

Investor shares are bought and sold at market price (not NAV) and are not individually redeemed from the Fund. Ordinary brokerage commissions apply.

Returns shown for periods of less than one year are not annualized.

Morningstar Ratings do not reflect the inclusion of sales charges. If sales charges were reflected, rankings could be lower.

Footnotes

¹ Equity investments involve greater risk, including higher volatility, than fixed-income investment options.

² Mid-cap stocks may have additional risks, including greater price volatility.

³ Small and mid-cap stocks may have additional risks including greater price volatility.

⁴ Investments concentrated in the healthcare industry may be adversely impacted by sector specific market shocks, unforeseen rate controls or regulations, higher than expected costs, or inability to bring new products to market.

⁵ International and global investing involves greater risks such as currency fluctuations, political/social instability and differing accounting standards.

⁸ Small-cap stocks may have additional risks including greater price volatility.

ETF Pricing & Performance

*Morningstar® Ratings as of 8/31/17

Strategic Beta

Principal Price Setters Index ETF 1, 2

Fund Prices (as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%) (as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Fund Expenses

Morningstar Rating

Principal Shareholder Yield Index ETF 1, 2

Fund Prices (as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%) (as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Fund Expenses

Morningstar Rating

Principal Healthcare Innovators Index ETF 1, 3, 4

Fund Prices (as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%) (as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Fund Expenses

Morningstar Rating

Principal Millennials Index ETF 1, 5

Fund Prices (as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%) (as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Fund Expenses

Morningstar Rating

Principal U.S. Small Cap Index ETF 8

Fund Prices (as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%) (as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Fund Expenses

Morningstar Rating

Disclosures

Footnotes

Principal Price Setters Index ETF ^{1,

2}

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Principal Shareholder Yield Index ETF ^{1,

2}

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Principal Healthcare Innovators Index ETF ^{1,

3,

4}

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Principal Millennials Index ETF ^{1,

5}

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)

Principal U.S. Small Cap Index ETF ⁸

Fund Prices
(as of 9/19/17) (as of 9/19/17) (as of 6/30/17) (as of 6/30/17)

Average Annual Total Returns (%)
(as of 8/31/17) (as of 8/31/17) (as of 6/30/17) (as of 6/30/17)