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MidWestOne Financial Group, Inc. 401(k) Plan Document Summary

Part I of this document consists of performance information for the plan’s investment options, and fees associated with those investments. In addition, Part I shows  how well the investments have performed in the past and compares the returns with an industry benchmark. Part II provides detailed information on the plan‐level  and individual fees that may be charged to your account.    Part I. Investment Information Your plan gives you the right to direct the investment of your account balance. To make a change to your investment elections, log into your account at  www.americantrustretirement.com; under Transactions, click Manage Investments ; under Change Elections, click Get Started .  The table below provides a list of the Designated Investment Alternatives (options) available to you under the plan and how these options have performed over time.  In addition, this table allows you to compare each investment type with an appropriate benchmark for the same timeframe. Past performance does not guarantee  how the investment option will perform in the future, and your investment in these options could lose money. Information about an option’s principal risks is available  in the investment’s fund fact sheet, as well as the fund’s prospectus. This information can be obtained by logging into your account at  www.americantrustretirement.com or calling American Trust at 800.548.2994 or contacting your plan administrator.  This table also provides the fee and expense information for each investment option. The Total Annual Operating Expenses are expenses that reduce the rate of return  of the investment option. This expense is expressed as a percentage, as well as the cost per $1,000 of investment. The Shareholder‐Type Fee is any fee charged against  your investment for purchase and sale other than the Total Annual Operating Expenses.  

Total Annual Operating Expense Average Annual Total Return As of 7/31/2017 

Mutual Funds  Name/Type of Option

Since  Inception 

Shareholder‐ Type Fees 

As a % 

Per $1,000 

1 year 

5 year 

10 year 

Large Growth  T. Rowe Price Instl Large Cap Growth  TIAA‐CREF Large‐Cap Gr Idx Instl  Benchmark:  Russell 1000 Growth TR USD 

0.56% 0.06%

$5.60 $0.60

28.46% 18.63%  17.97% 15.52%  18.05% 15.60%  16.00% 14.74%  16.04% 14.78%  18.97% 13.47%  13.71% 13.91%  13.76% 14.00%  16.27% 17.08%  12.75% 14.30%  13.39% 14.60%  14.44% 14.90%  14.69% 15.13%  15.11% 16.31%  15.05% 15.89%  12.69% 15.32%  18.32% 15.33%  14.22% 13.48%  17.76% 14.58%  19.66% 14.02%  14.89% 15.31%  19.21% 13.76%  20.83% 9.67%  18.33% 9.35%  17.77% 9.06%  25.31% 6.22%  24.58% 4.71% 

10.71% 9.30% 9.36%

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None None

Large Blend  Vanguard 500 Index Admiral  Benchmark:  S&P 500 TR USD 

0.04%

$0.40

7.73% 7.74% 5.99% 6.15% 6.21%

None

Large Value American Beacon Large Cap Value Instl  TIAA‐CREF Large‐Cap Value Idx Inst  Benchmark:  Russell 1000 Value TR USD 

0.60% 0.06%

$6.00 $0.60

None None

Mid‐Cap Growth T. Rowe Price Mid‐Cap Growth I 

0.63% 0.07%

$6.30 $0.70

10.43% 7.53% 8.30%

None None

Vanguard Mid‐Cap Growth Index Admiral  Benchmark:  Russell Mid Cap Growth TR USD 

Mid‐Cap Blend Columbia Mid Cap Index Z 

0.20%

$2.00

8.96% 9.13%

None

Benchmark:  S&P MidCap 400 TR  Mid‐Cap Value Victory Sycamore Established Value I  Vanguard Mid‐Cap Value Index Admiral  Benchmark:  Russell Mid Cap Value TR USD  Vanguard Small Cap Growth Index Admiral  Benchmark:  Russell 2000 Growth TR USD  Small Value Prudential QMA Small‐Cap Value Z  Vanguard Small Cap Value Index Admiral  Benchmark:  Russell 2000 Value TR USD  International MFS Instl International Equity  TIAA‐CREF International Eq Idx Instl  Benchmark:  MSCI EAFE NR USD  Emerging Markets Oppenheimer Developing Markets I  Small Growth Hartford Small Cap Growth Y 

0.69% 0.07%

$6.90 $0.70

10.13% 8.46% 7.99%

None None

0.83% 0.07%

$8.30 $0.70

9.31% 8.46% 8.49% 8.46% 8.35% 6.94% 4.17% 1.74% 1.46% 4.74% 3.48%

None None

0.73% 0.07%

$7.30 $0.70

None None

0.71% 0.06%

$7.10 $0.60

None None

0.88% 0.23%

$8.80 $2.30

None None

TIAA‐CREF Emerging Markets Eq Idx Instl Available until  10/25/2017  Fidelity® Emerging Markets Idx Premium Available after  10/26/2017 

0.13%

$1.30

24.13% 4.88% 

‐

5.66%

None

Benchmark:  MSCI EM NR USD 

24.84% 4.76% 

1.98%

‐

Balanced American Funds American Balanced R6 

0.29% 0.07%

$2.90 $0.70

10.96% 11.03%  9.12% 9.59%  9.21% 9.63%  1.22% 2.07%  0.26% 1.15%  ‐0.03% 1.67% 

7.23% 6.87% 6.81% 3.25% 2.85% 3.82%

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None None

Vanguard Balanced Index Adm 

Benchmark:  60% S&P 500 ‐ 40% Barclays Aggregate  Short‐Interm Term Bond Vanguard Short‐Term Investment‐Grade Adm 

0.10% 0.07%

$1.00 $0.70

None None

Vanguard Short‐Term Bond Index Adm 

Benchmark:  BBgBarc US Govt/Credit Interm TR USD