1

Annual Meeting of Stockholders

November 2nd, 2019

Greene County Bancorp, Inc.

Banking At Its Best!

2

Martin C. Smith

Chairman of the Board

Call to Order

Introduction of Directors &

Chairman of the Meeting

Greene County Bancorp, Inc.

3

Donald E. Gibson

President, Chief Executive Officer &

Director

Greene County Bancorp, Inc.

4

Greene County Bancorp, Inc.

Annual Meeting Agenda

Business Meeting

Annual Report to Shareholders

5

Greene County Bancorp, Inc.

Donald E. Gibson

President, Chief Executive Officer &

Director

Business Meeting

6

Greene County Bancorp, Inc.

Business Meeting

Proposal #1:

Election of Directors:

1) Donald E. Gibson

2) David H. Jenkins, DVM

3) Paul E. Slutzky

7

Greene County Bancorp, Inc.

Business Meeting (Continued)

Proposal #2:

Ratification of the Appointment of:

Bonadio & Co, LLP

8

Greene County Bancorp, Inc.

Business Meeting (Continued)

Proposal #3:

Consideration and action upon a

non-binding advisory resolution regarding

compensation of the Company’s named

executive officers.

9

Greene County Bancorp, Inc.

Business Meeting (Continued)

Proposal #4:

Consideration and action upon the

frequency of the Company to include an

advisory vote regarding compensation of the

Company’s named executive officers in its

proxy statement for shareholders

10

Greene County Bancorp, Inc.

Donald E. Gibson

President, Chief Executive Officer &

Director

Annual Report To Shareholders

11

Safe Harbor Statement

This presentation contains forward-looking information for Greene County Bancorp, Inc.

Such information constitutes forward-looking statements (within the meaning of the Private

Securities Litigation Reform Act of 1995),

which involve significant risks and uncertainties.

Actual results may differ materially from the results

discussed in these forward-looking statements.

12

Greene County Bancorp, Inc.

Michelle Plummer, CPA, CGMA

Executive Vice President

Chief Operating Officer

Chief Financial Officer & Director

Financial Highlights

Greene County Bancorp, Inc. Assets

20152016

20172018

2019$600

$800

$1,000

$1,200

$1,400

$739

$869

$982

$1,151

$1,269

Mil

lio

ns

13

June 2015 – June 2019

Greene County Bancorp, Inc.

Total Loans

20152016

20172018

2019$225$275$325$375$425$475$525$575$625$675$725$775$825

$443

$523

$624

$704

$785

Mil

lio

ns

14

June 2015 – June 2019

Greene County Bancorp, Inc. Consolidated Deposits

20152016

20172018

2019$400

$600

$800

$1,000

$1,200

$623

$739

$860

$1,025

$1,121

Mil

lio

ns

15

June 2015 – June 2019

Greene County Bancorp, Inc. Commercial Bank Assets

20152016

20172018

2019$150

$250

$350

$450

$550

$222

$285

$321

$427

$501

Mil

lio

ns

16

June 2015 – June 2019

Greene County Bancorp, Inc. Net Income

20152016

20172018

2019$5,000

$10,000

$15,000

$20,000

$7,189

$8,963

$11,187

$14,408

$17,484

17

June 2015 – June 2019

Th

ou

san

ds

Greene County Bancorp, Inc. Stockholder’s Equity

20152016

20172018

2019$50

$60

$70

$80

$90

$100

$67

$74

$84

$96 $112

Mil

lio

ns

18

June 2015 – June 2019

20152016

20172018

2019$0.50

$1.00

$1.50

$2.00

$2.50

$0.85

$1.06

$1.32

$1.69

$2.05

Greene County Bancorp, Inc. Earnings Per Share

June 2015 – June 2019 19

20152016

20172018

2019$5.50

$7.50

$9.50

$11.50

$13.50

$7.92

$8.77

$9.82

$11.27

$13.16

Greene County Bancorp, Inc. Book Value

June 2015 – June 2019 20

Greene County Bancorp, Inc. Return on Investment

21

80,000

330,000

580,000

830,000

1,080,000

1,330,000

1,580,000

1,830,000

2,080,000

2,330,000

2,580,000Investment of $100,000 at 1998 IPO

Source: Data per SNL Financial. Return on investment from 12/30/1998 to 06/30/2019.

Note: Return on investment calculations assumes the reinvestment of dividends.

$2,264,610

0%250%500%750%

1000%1250%1500%1750%2000%2250%2500%

Key Bank 7%

Trustco Bank 80%

GCBC 2165%

Greene County Bancorp, Inc. Return on Investment

December 1998 – June 2019

22

Source: Data per SNL Financial. Return on investment from 12/30/1998 to 06/30/2019.

Note: Return on investment calculations assumes the reinvestment of dividends.

23

Greene County Bancorp, Inc.

Stephen E. Nelson

Executive Vice President &

Chief Lending Officer

Lending Review

24

Greene County Bancorp, Inc. Nonperforming Loans to Loans v. Peer Group

2015 2016 2017 2018 20190.00%

1.50%

3.00%

4.50%

1.98%

1.16%

1.71%

0.74%

1.59%

0.68%

1.37%

0.64%

1.13%

0.63%

TBGC

Peer Group

June 2015 – June 2019 Peer Group as provided by FinPro Capital Advisors, Inc.

25

Greene County Bancorp, Inc. Allowance for Loan Losses to Total Loans

June 2015 – June 2019

20152016

20172018

20190.00%

1.00%

2.00%

3.00%

1.81% 1.79% 1.74% 1.68% 1.65%

Greene County Bancorp, Inc. Allowance for loan losses to non-performing loans

50.00%

150.00%

250.00%

350.00%

450.00%

2015 2016 2017 2018 2019

173%

279% 303%

336% 363%

26

June 2015 – June 2019

Greene County Bancorp, Inc.

Total Loans

20152016

20172018

2019$225$275$325$375$425$475$525$575$625$675$725$775$825

$443

$523

$624

$704

$785

Mil

lio

ns

27

June 2015 – June 2019

Greene County Bancorp, Inc. Total Loans

2010 2011 2012 2013 2014 2015 2016 2017 2018 2019$100

$200

$300

$400

$500

$600

$700

$800

$296 $301 $327

$359 $399

$443

$523

$624 $704

$785

Mil

lio

ns

28

June 2010 – June 2019

Greene County Bancorp, Inc.

29

New Lending Opportunities

30

Greene County Bancorp, Inc. Commercial Loan Growth

June 2015 – June 2019

2015 2016 2017 2018 2019

$0

$50

$100

$150

$200

$250

$300

$350

$400

$155

$40

$216

$49

$295

$60

$338

$85

$390

$104 Mil

lio

ns

Commercial

Mortgages M

Commercial

Loans L

M

M

M

M

M

L

L L L

L

Greene County Bancorp, Inc. Yield on Loans

31

June 2015 – June 2019

2015 2016 2017 2018 20190.00%

2.00%

4.00%

6.00%

8.00%

4.66% 4.56% 4.40% 4.43% 4.63%

27%

7% 1%

65% 49%

13% 1%

37%

Commercial

C & I

Consumer

Residential

32

Greene County Bancorp, Inc. Loan Mix

June 30, 2011 June 30, 2019

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Greene County Bancorp, Inc.

“Don’t worry about being successful, but work toward

being significant and the success will naturally follow.”

- Oprah Winfrey -

Greene County Bancorp, Inc.

34

Perry Lasher

Senior Vice President,

Director of Commercial Lending

“130 Years of Bank History”

50

Greene County Bancorp, Inc.

Donald E. Gibson

President, Chief Executive Officer &

Director

2018 KBW Bank Honor Roll

The American Banker Top 200 Community Banks List

Bauer Financial, Inc. – 5 Star Superior Rating

51

Our New Kinderhook Branch!

Greene County Bancorp, Inc.

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The Grand Opening!

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The Ribbon Cutting!

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Kinderhook Community Loans

55

Greene County Bancorp, Inc.

Questions?

56

Greene County Bancorp, Inc.

Inspector of Elections Report

Bradley Cummings, CPA

57

Greene County Bancorp, Inc.

Banking At Its Best!

Directly After This Meeting

Tours

will be available for the following:

58

Greene County Bancorp, Inc.

Tour Locations

Administrative Center @ 302 Main Street, Catskill

Operations Center @ 288 Main Street, Catskill

Main Office @ 425 Main Street, Catskill

Lending Center @ 341 Main Street, Catskill

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Greene County Bancorp, Inc.

Banking At Its Best!

- Thank You for Coming! -