Scientific Research Corporation_PHL_093021_Final

Plan At A Glance (continued) Scientific Research Corporation 401(k) Profit Sharing Plan

Professional, Scientific, and Technical Services

401(k) Industry Average Plan Type Average

09/30/2018

09/30/2019

09/30/2020

09/30/2021

09/30/2021

09/30/2021

INVESTMENT DIRECTION % of Participants w ith all assets in one investment option % of Participants w ith all assets in one investment, excluding target date investments % of Participants w ith all assets in one target date investment

22.3%

26.5%

30.5%

35.0%

64.6%

66.2%

4.1%

4.3%

4.7%

5.0%

5.1%

4.5%

18.2%

22.2%

25.8% 10.0%

29.9%

59.5%

61.6%

% of Participants that made an exchange PARTICIPANT ASSET ALLOCATION Number of investment options Average number of funds per participant % of Plan assets in money market funds % of Plan assets in bond funds % of Plan assets in multi-class funds % of Plan assets in target date investments

8.3%

8.1%

9.3%

9.1%

9.6%

19

19

19

19

18

16

9.6

9.0

8.4

8.2

2.5

2.3

6.4% 8.4% 0.0% 9.6%

6.7% 9.1% 0.0%

7.6% 9.6% 0.0%

6.8% 8.1% 0.0%

7.0% 4.7% 1.3%

7.6% 4.2% 0.8%

11.4% 71.5%

13.7% 68.1%

17.0% 67.3%

42.2% 41.9%

43.7% 34.5%

% of Plan assets in stock funds

74.5%

% of Plan assets in self -directed brokerage accounts

0.0% 1.1%

0.0% 1.3%

0.0% 1.1%

0.0% 0.9%

1.8% 0.6%

1.0% 1.1%

% of Plan assets in loans

PARTICIPANT ENGAGEMENT Average number of contacts per participant

21.7

22.0

24.3

23.2

18.7

18.1

% of Participants accessing participant w ebsite via brow ser % of Participants accessing participant w ebsite via app

83.4% 11.1%

78.7% 15.9%

81.6% 19.3%

79.1% 22.2%

67.2% 16.5%

61.6% 19.4%

# of Emails opened/sent

4,098 / 10,678

5,839 / 15,776

7,432 / 18,570

14,249 / 36,388

980 / 477

1,578 / 857

Average number of contacts to call center per participant

0.4

0.4

0.4

0.3

N/A

0.4

The Pro fessional, Scientific, and Technical Services industry contains 95 to tal T. Rowe Price plans. Data is based on all 401(k) plan types within the client universe o f T. Rowe Price Retirement Plan Services, Inc. %o f Participants contributing at or above the companymatch does no t include participants who have elected to defer by do llar amount. Auto-enro llment participation for each time period is based on 6 month data. The industry and plan type averages for auto-increase participation shows opt-in/opt-out statistics. All Target Date investments and Self-Directed brokerage accounts are included and counted as one option each. Participant engagement statistics only include participants with a balance.

10

T. ROWE PR ICE