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ONE Gas

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FY2015 Annual Report · ONE Gas
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ONE Gas, Inc. is a 100-percent regulated natural gas 

utility, and trades on the New York Stock Exchange 

under the symbol “OGS.” ONE Gas is included in the 

S&P MidCap 400 Index, and is one of the largest natural 

gas utilities in the United States.

ONE Gas

Investing for a Better Tomorrow

  ONE Gas provides natural gas 
distribution services to more than 
2 million customers in Oklahoma,
Kansas and Texas. 

  ONE Gas is headquartered 
in Tulsa, Okla.

  Our divisions include:

Oklahoma Natural Gas, the
largest natural gas distributor 
in Oklahoma;

Kansas Gas Service, the 
largest in Kansas; and

Texas Gas Service, the third 
largest in Texas, in terms 
of customers.

  Our largest natural gas distribution 
markets by customer count are 
Oklahoma City and Tulsa, Okla.; 
Kansas City, Wichita and Topeka, Kan.; 
and Austin and El Paso, Texas. 

  We serve residential, commercial, 
industrial, transportation and 
wholesale customers in all three states.

Mission – Why We Exist

We deliver natural gas for a better tomorrow. 

Vision – What We Want to Be

To be a premier natural gas distribution company 
creating exceptional value for our stakeholders.

Core Values 

Safety: We are committed to operating safely and in an 
environmentally responsible manner. 

Inclusion and Diversity: We embrace and promote 
diversity and collaboration; every employee makes a 
difference and contributes to our success. 

Ethics: We are accountable to the highest ethical 
standards; honesty, trust and integrity matter. 

Service: We provide exceptional service and make 
continuous improvements in our pursuit of excellence. 

Value: We create value for all stakeholders, including 
our employees, customers, investors and communities. 

Visit us: www.ONEGas.com

Like us on Facebook: facebook.com/onegasincorporated 

Follow us on Twitter: @ONEGasInc

1

ONE Gas, Inc. is a 100-percent regulated natural gas 

utility, and trades on the New York Stock Exchange 

under the symbol “OGS.” ONE Gas is included in the 

S&P MidCap 400 Index, and is one of the largest natural 

gas utilities in the United States.

ONE Gas

Investing for a Better Tomorrow

  ONE Gas provides natural gas 
distribution services to more than 
2 million customers in Oklahoma,
Kansas and Texas. 

  ONE Gas is headquartered 
in Tulsa, Okla.

  Our divisions include:

Oklahoma Natural Gas, the
largest natural gas distributor 
in Oklahoma;

Kansas Gas Service, the 
largest in Kansas; and

Texas Gas Service, the third 
largest in Texas, in terms 
of customers.

  Our largest natural gas distribution 
markets by customer count are 
Oklahoma City and Tulsa, Okla.; 
Kansas City, Wichita and Topeka, Kan.; 
and Austin and El Paso, Texas. 

  We serve residential, commercial, 
industrial, transportation and 
wholesale customers in all three states.

Mission – Why We Exist

We deliver natural gas for a better tomorrow. 

Vision – What We Want to Be

To be a premier natural gas distribution company 
creating exceptional value for our stakeholders.

Core Values 

Safety: We are committed to operating safely and in an 
environmentally responsible manner. 

Inclusion and Diversity: We embrace and promote 
diversity and collaboration; every employee makes a 
difference and contributes to our success. 

Ethics: We are accountable to the highest ethical 
standards; honesty, trust and integrity matter. 

Service: We provide exceptional service and make 
continuous improvements in our pursuit of excellence. 

Value: We create value for all stakeholders, including 
our employees, customers, investors and communities. 

Visit us: www.ONEGas.com

Like us on Facebook: facebook.com/onegasincorporated 

Follow us on Twitter: @ONEGasInc

1

2015 Highlights

Our second year as a company 
was another year fi  lled with 
accomplishments, thanks to 
the hard work and dedication 
of our employees. 

We delivered a total shareholder return 
of approximately 25 percent in 2015, 
outperforming our peer group and the 
S&P MidCap Utilities Index. Shareholder 
returns refl ect solid operating and 
fi nancial results, and the continued 
investments in our assets.

We expect net income and earnings 
per share to increase by an average 
of 5 to 8 percent annually between 
2015 and 2020. 

We increased the quarterly dividend 
by 5 cents per share to 35 cents per 
share, effective for the fi rst quarter 2016, 
resulting in an annualized dividend of 
$1.40 per share.

We expect an average annual 
dividend increase of 8 to 10 percent 
between 2015 and 2020, while 
maintaining a 55 to 65 percent 
dividend payout ratio.

Shareholder letter

To Our Fellow Shareholders:
This time last year, we were wrapping up our fi rst full 
year as a new, stand-alone publicly traded company. We 
spent a lot of time during year one laying out plans and 
goals for the future success of our company. Our mission 
is straightforward and simple. We deliver natural gas for 
a better tomorrow. In year two, we were able to put our 
strategic plan into action – working toward our goals and 
measuring our success. We are extremely proud of our 
employees and all that they’ve accomplished.

Last year, we challenged ourselves to focus on the fi ve 
key themes that would make the greatest impact on our 
company – safety, high-performing workforce, leveraging 
technology, growth and regulatory. We are pleased to say 
we’ve made great strides in executing on the objectives 
and initiatives supporting these fi ve key themes. 

When it comes to safety, our results continue to improve 
and refl ect our emphasis on keeping our employees, 
customers and communities safe. Compared with 
2014, we achieved a 10 percent reduction in our Total 
Recordable Injury Rate and a 7 percent reduction in 
our Preventable Vehicle Incident Rate. As a company, 
we’ve committed to focusing on processes, policies and 
guidelines that result in driving toward “zero harm” and 
“zero injuries” every day. 

In 2015, employees in leadership roles participated in 
our Leadership Development Program. This program 
provided them the opportunity to learn and grow in their 
leadership skills. In a continued effort to cultivate a 
high-performing workforce, we will introduce an ongoing 
Aspiring Leader Program this year, which will focus on 
developing the future leaders of our company. It will 
also provide them with a unique opportunity to develop 
skills that are necessary for sustaining and growing our 
company for years to come.  

After a demanding year of rolling out new technology 
to two-thirds of our fi eld workforce, we are beginning to 
see the benefi ts of that hard work. New technology for 
operations is increasing our effi ciency and productivity 

in the fi eld, as employees become more familiar with 
new equipment and processes. Additionally, new mobile 
apps have been released to our customers, making it 
easier for customers to manage their own accounts by 
tracking usage and paying their bill, among other things. 
We are pleased with the progress toward our leveraging 
technology objective, and eager to see its continued 
impact on the work that we do. 

Growth remains a top priority, and we made great 
progress in 2015. One way we grow is by investing in 
our existing systems. We invested $294 million in capital 
expenditures in 2015, of which more than 70 percent 
went toward system integrity and replacement projects. 
Another way we grow is by adding customers. We 
averaged 13,000 more customers in 2015 compared 
with 2014. 

We continue to execute on our regulatory strategy 
through collaborative relationships with regulators and 
fi nding opportunities that allow us to provide the most 
cost-effective, safe and reliable service to our customers. 
Rate activity across all three of our states – Oklahoma, 
Kansas and Texas – resulted in a base revenue increase 
of $27.5 million, compared with 2014. Rate adjustments 
allow us to continue serving our customers with safe 
and reliable natural gas service. 

We believe that natural gas remains well positioned to be 
competitive against other energy options and is among 
the best carbon fuels for maintaining limited emissions. 

We remain diligent at being good stewards of our 
product. This includes focusing on reducing emissions 
and fi nding innovative ways to use natural gas. Natural 
gas goes beyond the four touchpoints in our homes – 
the natural gas furnace, clothes dryer, stove top and 
water heater. It provides even more – reliability, warmth, 
comfort and convenience. 

We look forward to the year ahead – and while we’re 
always looking forward to our future, we know that
a better tomorrow starts today. 

John W. Gibson
Chairman
ONE Gas, Inc.
April 1, 2016

Pierce H. Norton II
President and Chief Executive Offi cer
ONE Gas, Inc.
April 1, 2016

2

3

2015 Highlights

Our second year as a company 
was another year fi  lled with 
accomplishments, thanks to 
the hard work and dedication 
of our employees. 

We delivered a total shareholder return 
of approximately 25 percent in 2015, 
outperforming our peer group and the 
S&P MidCap Utilities Index. Shareholder 
returns refl ect solid operating and 
fi nancial results, and the continued 
investments in our assets.

We expect net income and earnings 
per share to increase by an average 
of 5 to 8 percent annually between 
2015 and 2020. 

We increased the quarterly dividend 
by 5 cents per share to 35 cents per 
share, effective for the fi rst quarter 2016, 
resulting in an annualized dividend of 
$1.40 per share.

We expect an average annual 
dividend increase of 8 to 10 percent 
between 2015 and 2020, while 
maintaining a 55 to 65 percent 
dividend payout ratio.

Shareholder letter

To Our Fellow Shareholders:
This time last year, we were wrapping up our fi rst full 
year as a new, stand-alone publicly traded company. We 
spent a lot of time during year one laying out plans and 
goals for the future success of our company. Our mission 
is straightforward and simple. We deliver natural gas for 
a better tomorrow. In year two, we were able to put our 
strategic plan into action – working toward our goals and 
measuring our success. We are extremely proud of our 
employees and all that they’ve accomplished.

Last year, we challenged ourselves to focus on the fi ve 
key themes that would make the greatest impact on our 
company – safety, high-performing workforce, leveraging 
technology, growth and regulatory. We are pleased to say 
we’ve made great strides in executing on the objectives 
and initiatives supporting these fi ve key themes. 

When it comes to safety, our results continue to improve 
and refl ect our emphasis on keeping our employees, 
customers and communities safe. Compared with 
2014, we achieved a 10 percent reduction in our Total 
Recordable Injury Rate and a 7 percent reduction in 
our Preventable Vehicle Incident Rate. As a company, 
we’ve committed to focusing on processes, policies and 
guidelines that result in driving toward “zero harm” and 
“zero injuries” every day. 

In 2015, employees in leadership roles participated in 
our Leadership Development Program. This program 
provided them the opportunity to learn and grow in their 
leadership skills. In a continued effort to cultivate a 
high-performing workforce, we will introduce an ongoing 
Aspiring Leader Program this year, which will focus on 
developing the future leaders of our company. It will 
also provide them with a unique opportunity to develop 
skills that are necessary for sustaining and growing our 
company for years to come.  

After a demanding year of rolling out new technology 
to two-thirds of our fi eld workforce, we are beginning to 
see the benefi ts of that hard work. New technology for 
operations is increasing our effi ciency and productivity 

in the fi eld, as employees become more familiar with 
new equipment and processes. Additionally, new mobile 
apps have been released to our customers, making it 
easier for customers to manage their own accounts by 
tracking usage and paying their bill, among other things. 
We are pleased with the progress toward our leveraging 
technology objective, and eager to see its continued 
impact on the work that we do. 

Growth remains a top priority, and we made great 
progress in 2015. One way we grow is by investing in 
our existing systems. We invested $294 million in capital 
expenditures in 2015, of which more than 70 percent 
went toward system integrity and replacement projects. 
Another way we grow is by adding customers. We 
averaged 13,000 more customers in 2015 compared 
with 2014. 

We continue to execute on our regulatory strategy 
through collaborative relationships with regulators and 
fi nding opportunities that allow us to provide the most 
cost-effective, safe and reliable service to our customers. 
Rate activity across all three of our states – Oklahoma, 
Kansas and Texas – resulted in a base revenue increase 
of $27.5 million, compared with 2014. Rate adjustments 
allow us to continue serving our customers with safe 
and reliable natural gas service. 

We believe that natural gas remains well positioned to be 
competitive against other energy options and is among 
the best carbon fuels for maintaining limited emissions. 

We remain diligent at being good stewards of our 
product. This includes focusing on reducing emissions 
and fi nding innovative ways to use natural gas. Natural 
gas goes beyond the four touchpoints in our homes – 
the natural gas furnace, clothes dryer, stove top and 
water heater. It provides even more – reliability, warmth, 
comfort and convenience. 

We look forward to the year ahead – and while we’re 
always looking forward to our future, we know that
a better tomorrow starts today. 

John W. Gibson
Chairman
ONE Gas, Inc.
April 1, 2016

Pierce H. Norton II
President and Chief Executive Offi cer
ONE Gas, Inc.
April 1, 2016

2

3

Financial Overview

2015 Summary
We reported full-year 2015 net income of $119.0 million, 
or $2.24 per diluted share, compared with $109.8 million, 
or $2.07 per diluted share, in 2014; and full-year 2015 
capital expenditures of $294.3 million, compared with 
$297.1 million in 2014.

Our operating income was $239.1 million, compared 
with $225.3 million in 2014, as net margin increased 
by $14.7 million compared with last year.

Net margin increases in 2015 primarily refl ected new 
rates in Oklahoma and Texas along with an increase in 
our average residential customer count in these states. 

We lowered operating costs in 2015, which were 
$469.6 million, compared with $476.0 million in 2014, 

Highlights
Earnings and Dividends

Net Income (thousands)

Earnings Per Share of Common Stock

     Basic

     Diluted

Dividends Per Share

Margin, Volumes and Weather

Net Margin (thousands)

Total Volumes Sold (Bcf)

Total Volumes Delivered (Bcf)

Actual Heating Degree Days

Normal Heating Degree Days

Customers and Employees

Average Number of Customers (thousands)

Total Employees

Common Stock

Signifi  cant Scale
High Percentage of Residential Customers

83%
Residential

92%
Residential

16%
Commercial /
Industrial

1%
Other

Net Sales Margin
(Excludes transportation)

Customer Count
(Excludes transportation)

7%
Commercial /
Industrial

1%
Other

which primarily refl ects decreases in information technology 
costs associated with our separation in 2014 from 
ONEOK, Inc. We also benefi ted from a decrease in outside 
services expenses, bad debt and fl eet-related expenses. 

On January 19, 2016, the ONE Gas Board of Directors 
increased the quarterly dividend by 5 cents per share to 
35 cents per share, effective in the fi rst quarter 2016, 
resulting in an annualized dividend of $1.40 per share.  
Our average annual dividend growth rate is expected to 
increase 8 to 10 percent between 2015 and 2020, with 
a targeted dividend payout ratio of 55 to 65 percent of 
net income, all subject to board of directors’ approval.

2015

2014

2013

$ 119,030

$ 109,790

$

$

$

2.26

2.24

1.20

$

$

$

2.10

2.07

0.84

$

$

$

$

99,195

1.90

1.90

–

$ 841,733

$ 826,957

$

813,008

Oklahoma

Kansas

Texas

Average Total:

154.0

358.8

9,114

9,962

2,140

3,400

166.3

379.8

10,615

9,965

2,127

3,300

164.2

370.1

11,036

9,970

2,114

–

–

2015 Fixed Charges
Sales Customers*

87%

55%

72%

73%

Average Annual Heating 
Degree Days – Normal

3,317

4,860

1,785

–

Weather Normalization**

100%

100%

62%

89%

Market Value Per Share – Year-End Closing Price

$

50.17

$

41.22

Average Shares of Common Stock, Outstanding (thousands)

     Basic

     Diluted

52,578

53,254

52,364

52,946

52,319

52,319

* Prior to 2014, historical basic and diluted earnings per share for the periods presented were calculated based on the number
of shares distributed to ONEOK shareholders on separation plus any shares associated with fully vested stock awards that had 
not been issued and considered outstanding as of the beginning of each period prior to the separation.

4

* Fixed percentage of total net margin on natural gas sales
** Percent of customers who are in jurisdictions with weather normalization adjustment mechanisms

5

Financial Overview

2015 Summary
We reported full-year 2015 net income of $119.0 million, 
or $2.24 per diluted share, compared with $109.8 million, 
or $2.07 per diluted share, in 2014; and full-year 2015 
capital expenditures of $294.3 million, compared with 
$297.1 million in 2014.

Our operating income was $239.1 million, compared 
with $225.3 million in 2014, as net margin increased 
by $14.7 million compared with last year.

Net margin increases in 2015 primarily refl ected new 
rates in Oklahoma and Texas along with an increase in 
our average residential customer count in these states. 

We lowered operating costs in 2015, which were 
$469.6 million, compared with $476.0 million in 2014, 

Highlights
Earnings and Dividends

Net Income (thousands)

Earnings Per Share of Common Stock

     Basic

     Diluted

Dividends Per Share

Margin, Volumes and Weather

Net Margin (thousands)

Total Volumes Sold (Bcf)

Total Volumes Delivered (Bcf)

Actual Heating Degree Days

Normal Heating Degree Days

Customers and Employees

Average Number of Customers (thousands)

Total Employees

Common Stock

Signifi  cant Scale
High Percentage of Residential Customers

83%
Residential

92%
Residential

16%
Commercial /
Industrial

1%
Other

Net Sales Margin
(Excludes transportation)

Customer Count
(Excludes transportation)

7%
Commercial /
Industrial

1%
Other

which primarily refl ects decreases in information technology 
costs associated with our separation in 2014 from 
ONEOK, Inc. We also benefi ted from a decrease in outside 
services expenses, bad debt and fl eet-related expenses. 

On January 19, 2016, the ONE Gas Board of Directors 
increased the quarterly dividend by 5 cents per share to 
35 cents per share, effective in the fi rst quarter 2016, 
resulting in an annualized dividend of $1.40 per share.  
Our average annual dividend growth rate is expected to 
increase 8 to 10 percent between 2015 and 2020, with 
a targeted dividend payout ratio of 55 to 65 percent of 
net income, all subject to board of directors’ approval.

2015

2014

2013

$ 119,030

$ 109,790

$

$

$

2.26

2.24

1.20

$

$

$

2.10

2.07

0.84

$

$

$

$

99,195

1.90

1.90

–

$ 841,733

$ 826,957

$

813,008

Oklahoma

Kansas

Texas

Average Total:

154.0

358.8

9,114

9,962

2,140

3,400

166.3

379.8

10,615

9,965

2,127

3,300

164.2

370.1

11,036

9,970

2,114

–

–

2015 Fixed Charges
Sales Customers*

87%

55%

72%

73%

Average Annual Heating 
Degree Days – Normal

3,317

4,860

1,785

–

Weather Normalization**

100%

100%

62%

89%

Market Value Per Share – Year-End Closing Price

$

50.17

$

41.22

Average Shares of Common Stock, Outstanding (thousands)

     Basic

     Diluted

52,578

53,254

52,364

52,946

52,319

52,319

* Prior to 2014, historical basic and diluted earnings per share for the periods presented were calculated based on the number
of shares distributed to ONEOK shareholders on separation plus any shares associated with fully vested stock awards that had 
not been issued and considered outstanding as of the beginning of each period prior to the separation.

4

* Fixed percentage of total net margin on natural gas sales
** Percent of customers who are in jurisdictions with weather normalization adjustment mechanisms

5

Natural Gas

6

7

Beyond the Touchpoints

Natural gas touches every part of our daily lives. It is the better source of energy for heat, hot water 
and cooking in homes and businesses in the U.S. In addition to its effi ciency, natural gas provides 
a greater quality of life.

Natural gas not only fuels your home, it fuels your family by providing clean clothes, hot showers and 
a warm home. In your kitchen, in your laundry room or on your back patio, natural gas delivers heat 
and energy that fuels your family’s needs.

Using natural gas to fuel your home provides a sense of comfort, knowing you have chosen one of the 
most effi cient energy options. 

Natural Gas

6

7

Beyond the Touchpoints

Natural gas touches every part of our daily lives. It is the better source of energy for heat, hot water 
and cooking in homes and businesses in the U.S. In addition to its effi ciency, natural gas provides 
a greater quality of life.

Natural gas not only fuels your home, it fuels your family by providing clean clothes, hot showers and 
a warm home. In your kitchen, in your laundry room or on your back patio, natural gas delivers heat 
and energy that fuels your family’s needs.

Using natural gas to fuel your home provides a sense of comfort, knowing you have chosen one of the 
most effi cient energy options. 

Growth

Expanding Services to Fuel Tomorrow
As a 100-percent regulated natural gas utility, we are 
committed to growth that aligns with our long-term 
strategy. Our growth opportunities are a result of capital 
investments related to the safety and reliability of our 
existing system, and system growth related to the 
economic and population growth in our service territories. 

As a result of our commitment to enhance the safety, 
integrity and reliability of our existing infrastructure, we 
are making signifi cant investments in our system, which 
we expect to further grow our rate base. 

Many service territories continue to experience economic 
growth, allowing us opportunities to invest in new service 
lines and main line extensions, predominately in the 
major metropolitan areas.

We believe the competitiveness of natural gas is 
increasing relative to other energy alternatives, creating 
new market opportunities for natural gas as an energy 
source within our existing service territories.

This past year, we invested in growth in several 
areas, including:

The Stillwater Energy Center
Oklahoma Natural Gas installed a fi ve-mile, 12-inch 
pipeline to tie the new high-effi ciency, natural gas-fi red 
power plant to an existing midstream transmission 
pipeline, ultimately powering the 56-megawatt energy 
center, which when in service in 2016 will provide 
electricity for the Stillwater, Okla., community. 

Pipeline Upgrades in Kansas 
In 2015, Kansas Gas Service completed a new main 
extension in Overland Park that will support future growth 
in southern Johnson County, bringing much-needed 
volume capacity to the area.

UTMB 
Texas Gas Service completed construction on a new 
four-mile, 8-inch natural gas distribution pipeline to the 
University of Texas Medical Branch at Galveston (UTMB). 
The project allowed the company to provide additional 
natural gas service and energy capacity to UTMB, 
Galveston’s largest employer. 

Oklahoma Natural Gas completed a pipeline project to supply the 
Stillwater Energy Center with effi  cient natural gas.

System Integrity

A better tomorrow started companywide in 2015 with 
an enhanced system integrity strategy to make us even 
more effi cient and proactive in ensuring safe and 
reliable natural gas service. 

Our System Integrity department is benefi ting from 
leadership focused on more effi cient and effective 
processes. Implementation of enterprise-wide 
technology has enabled us to evaluate assets and 
projects using a consistent risk management 
framework – a game changer for the way we plan 
for work and capital expenditures. 

In 2015, we were able to:

  Create clear visibility within our organizational 
structure by merging asset management and 
engineering to form a new System Integrity 
department;

  Verify alignment of asset management processes 
and integrity management programs;

  Focus on an enterprise-wide, risk-based 
approach to asset replacement; and

  Continue to improve asset records and long-term 
plans for system integrity improvements.

8

9

Employees near Sapulpa, Okla. insert a “pig” as part of procedures to 
inspect a pipeline. Pigs are used to perform various maintenance tasks 
and inspections on certain pipelines.

Growth

Expanding Services to Fuel Tomorrow
As a 100-percent regulated natural gas utility, we are 
committed to growth that aligns with our long-term 
strategy. Our growth opportunities are a result of capital 
investments related to the safety and reliability of our 
existing system, and system growth related to the 
economic and population growth in our service territories. 

As a result of our commitment to enhance the safety, 
integrity and reliability of our existing infrastructure, we 
are making signifi cant investments in our system, which 
we expect to further grow our rate base. 

Many service territories continue to experience economic 
growth, allowing us opportunities to invest in new service 
lines and main line extensions, predominately in the 
major metropolitan areas.

We believe the competitiveness of natural gas is 
increasing relative to other energy alternatives, creating 
new market opportunities for natural gas as an energy 
source within our existing service territories.

This past year, we invested in growth in several 
areas, including:

The Stillwater Energy Center
Oklahoma Natural Gas installed a fi ve-mile, 12-inch 
pipeline to tie the new high-effi ciency, natural gas-fi red 
power plant to an existing midstream transmission 
pipeline, ultimately powering the 56-megawatt energy 
center, which when in service in 2016 will provide 
electricity for the Stillwater, Okla., community. 

Pipeline Upgrades in Kansas 
In 2015, Kansas Gas Service completed a new main 
extension in Overland Park that will support future growth 
in southern Johnson County, bringing much-needed 
volume capacity to the area.

UTMB 
Texas Gas Service completed construction on a new 
four-mile, 8-inch natural gas distribution pipeline to the 
University of Texas Medical Branch at Galveston (UTMB). 
The project allowed the company to provide additional 
natural gas service and energy capacity to UTMB, 
Galveston’s largest employer. 

Oklahoma Natural Gas completed a pipeline project to supply the 
Stillwater Energy Center with effi  cient natural gas.

System Integrity

A better tomorrow started companywide in 2015 with 
an enhanced system integrity strategy to make us even 
more effi cient and proactive in ensuring safe and 
reliable natural gas service. 

Our System Integrity department is benefi ting from 
leadership focused on more effi cient and effective 
processes. Implementation of enterprise-wide 
technology has enabled us to evaluate assets and 
projects using a consistent risk management 
framework – a game changer for the way we plan 
for work and capital expenditures. 

In 2015, we were able to:

  Create clear visibility within our organizational 
structure by merging asset management and 
engineering to form a new System Integrity 
department;

  Verify alignment of asset management processes 
and integrity management programs;

  Focus on an enterprise-wide, risk-based 
approach to asset replacement; and

  Continue to improve asset records and long-term 
plans for system integrity improvements.

8

9

Employees near Sapulpa, Okla. insert a “pig” as part of procedures to 
inspect a pipeline. Pigs are used to perform various maintenance tasks 
and inspections on certain pipelines.

Commitment to ZERO

Even a single accident is one too many.
Our “Zero Is Possible” perspective guides us when 
it comes to safety. Zero injuries and incidents is our 
target each and every day. 

To work toward this goal in 2015, we continued to 
focus on three particular safety initiatives that brought 
meaningful results: Employees achieved a 10 percent 
reduction from the previous year in the Total 
Recordable Injury Rate AND a 7 percent reduction 
in the Preventable Vehicle Incident Rate.

1. Since incorporating MoveSMART® into their day-to-
day work three years ago, employees have achieved 
an overall reduction of 52 percent in sprain and 
strain injuries. 

 By learning this method of body mechanics and 
body positioning, employees can achieve maximum 
strength and balance to avoid injury.

2. In 2015, employees performed more than 8,800 
peer-to-peer observations through our Behavior-Based 
Safety program.

 Trained employees voluntarily go to fi eld locations 
to observe other employees performing their job 
duties. The result is constructive feedback on how 
employees were working safely or how they may 
have been putting themselves or others at risk. 

 The observers and the observed discuss ways to 
replace at-risk behavior with safe behavior.

3. Implementation of the Smith System® driving 
program has been instrumental in reducing motor 
vehicle accidents companywide.

 The Smith System is one of the best established 
and most widely used defensive driving programs 
for fl eet operations.

 It keeps drivers engaged in their surroundings and 
focused on the task at hand, which is safe driving.

Preventable Vehicle Incident Rate (PVIR) 
was 1.88 incidents per million miles driven.
American Gas Association PVIR Quartile Data

4th Q.

3rd

2nd

1st

3.58

2.73

2.35

2.24

1.77

2.03

1.88

2009

2010

2011

2012

2013

2014

2015

Total Recordable Incident Rate (TRIR) 
was 2.20 incidents per 200,000 work hours.
American Gas Association TRIR Quartile Data

6.34

4th Q.

5.36

3rd

2nd

1st

4.28

3.62

2.98

2.45

2.20

2009

2010

2011

2012

2013

2014

2015

The American Gas Association represents local 
energy companies that deliver clean natural gas 
throughout the U.S.

 ONE Gas drivers log more than 30 million miles annually, so defensive driving is a must. 

10%

percent reduction from the 
previous year in the Total 
Recordable Injury Rate.

8,800

peer-to-peer observations 
through our Behavior-Based 
Safety program.

7%

reduction in the Preventable 
Vehicle Incident Rate.

52%

reduction in sprain 
and strain injuries.

10

11

Commitment to ZERO

Even a single accident is one too many.
Our “Zero Is Possible” perspective guides us when 
it comes to safety. Zero injuries and incidents is our 
target each and every day. 

To work toward this goal in 2015, we continued to 
focus on three particular safety initiatives that brought 
meaningful results: Employees achieved a 10 percent 
reduction from the previous year in the Total 
Recordable Injury Rate AND a 7 percent reduction 
in the Preventable Vehicle Incident Rate.

1. Since incorporating MoveSMART® into their day-to-
day work three years ago, employees have achieved 
an overall reduction of 52 percent in sprain and 
strain injuries. 

 By learning this method of body mechanics and 
body positioning, employees can achieve maximum 
strength and balance to avoid injury.

2. In 2015, employees performed more than 8,800 
peer-to-peer observations through our Behavior-Based 
Safety program.

 Trained employees voluntarily go to fi eld locations 
to observe other employees performing their job 
duties. The result is constructive feedback on how 
employees were working safely or how they may 
have been putting themselves or others at risk. 

 The observers and the observed discuss ways to 
replace at-risk behavior with safe behavior.

3. Implementation of the Smith System® driving 
program has been instrumental in reducing motor 
vehicle accidents companywide.

 The Smith System is one of the best established 
and most widely used defensive driving programs 
for fl eet operations.

 It keeps drivers engaged in their surroundings and 
focused on the task at hand, which is safe driving.

Preventable Vehicle Incident Rate (PVIR) 
was 1.88 incidents per million miles driven.
American Gas Association PVIR Quartile Data

4th Q.

3rd

2nd

1st

3.58

2.73

2.35

2.24

1.77

2.03

1.88

2009

2010

2011

2012

2013

2014

2015

Total Recordable Incident Rate (TRIR) 
was 2.20 incidents per 200,000 work hours.
American Gas Association TRIR Quartile Data

6.34

4th Q.

5.36

3rd

2nd

1st

4.28

3.62

2.98

2.45

2.20

2009

2010

2011

2012

2013

2014

2015

The American Gas Association represents local 
energy companies that deliver clean natural gas 
throughout the U.S.

 ONE Gas drivers log more than 30 million miles annually, so defensive driving is a must. 

10%

percent reduction from the 
previous year in the Total 
Recordable Injury Rate.

8,800

peer-to-peer observations 
through our Behavior-Based 
Safety program.

7%

reduction in the Preventable 
Vehicle Incident Rate.

52%

reduction in sprain 
and strain injuries.

10

11

In 2015, through our ONE Gas 
Foundation, civic and corporate 
contributions, we invested more than 

$2.2 million 

in communities where we serve. 

Community Investment

ONE Gas recognizes that our employees, retirees and 
board of directors support community organizations in the 
areas where we live, work and operate, which underscores 
the ONE Gas Foundation's guiding principles: 

Optimize Impact

Give Hope

Strengthen Communities

As a company, we believe that better tomorrows 
require a commitment to making communities better 
today through charitable giving and volunteerism. 

47 

approved requests for grants 
by the ONE Gas Foundation.

$40,000

to Habitat for Humanity.

199 Matching Grants awarded 
totaling more than 

$114,000.

2,026 employees, retirees and directors 
pledged $743,000 to United Way 
agencies in 2015, all matched dollar 
for dollar totaling more than 

$1.4 million.

26

public school foundation grants.

6,118

Employee Volunteer Hours

Habitat for Humanity          Local Food Banks          Meals on Wheels          Special Olympics          Boys & Girls Club

12

13

In 2015, through our ONE Gas 
Foundation, civic and corporate 
contributions, we invested more than 

$2.2 million 

in communities where we serve. 

Community Investment

ONE Gas recognizes that our employees, retirees and 
board of directors support community organizations in the 
areas where we live, work and operate, which underscores 
the ONE Gas Foundation's guiding principles: 

Optimize Impact

Give Hope

Strengthen Communities

As a company, we believe that better tomorrows 
require a commitment to making communities better 
today through charitable giving and volunteerism. 

47 

approved requests for grants 
by the ONE Gas Foundation.

$40,000

to Habitat for Humanity.

199 Matching Grants awarded 
totaling more than 

$114,000.

2,026 employees, retirees and directors 
pledged $743,000 to United Way 
agencies in 2015, all matched dollar 
for dollar totaling more than 

$1.4 million.

26

public school foundation grants.

6,118

Employee Volunteer Hours

Habitat for Humanity          Local Food Banks          Meals on Wheels          Special Olympics          Boys & Girls Club

12

13

A Cleaner, 
More Efficient Fuel

A Better Tomorrow for All
We understand we have a responsibility to all of our 
stakeholders to operate safely, effi ciently and 
environmentally responsibly. We plan to meet this 
expectation by focusing on our mission while keeping 
our values intact.

According to the American Gas Association, a study 
published in Environmental Science & Technology led by 
a team from Washington State University found that 
emission estimates from local natural gas distribution 
systems in cities and towns throughout the U.S. have 
decreased in the past 20 years to levels 36 to 70 percent 
lower than the 2011 U.S. Environmental Protection 
Agency inventory. 

The study concludes that as little as 0.1 percent of the 
natural gas delivered nationwide is emitted from local 
distribution systems. 

ONE Gas is committed to operating in an environmentally 
responsible manner. We are accountable for providing 
services that are aligned with efforts to reduce emissions.

In 2015, we retired or replaced approximately 425 miles 
of distribution and transmission facilities, which will result 
in decreased emissions of methane.

Commitment to the Methane 
Challenge Program

In 2015, ONE Gas actively participated in the 
development of the U.S. Environmental Protection 
Agency (EPA) Natural Gas STAR Methane Challenge 
Program to voluntarily reduce greenhouse gas emissions.

The program is a flexible, voluntary partnership with 
natural gas companies and the EPA to promote and 
track the reduction of methane emissions beyond what 
is federally required.

The program requires a signed commitment to reduce 
emissions through a Best Management Practice 
Commitment, a companywide implementation of 
best practices focused on reducing emissions from 
key sources.

Energy Efficiency

In 2015, our Energy Efficiency Program in Oklahoma 
and the Austin Conservation Program in Texas issued 
more than 67,800 rebates combined – totaling 
approximately $11.15 million in energy-efficiency 
customer rebates on natural gas appliances and energy-
efficient home improvements.

Wildlife and Endangered 
Species Preservation 

We are committed to working to resolve any potential 
issues with endangered species, migratory birds, cultural 
or historical assets and government agency permitting 
requirements. We not only follow the regulations but also 
work with our subcontractors and consultants to do 
the same.

14

15

A Cleaner, 
More Efficient Fuel

A Better Tomorrow for All
We understand we have a responsibility to all of our 
stakeholders to operate safely, effi ciently and 
environmentally responsibly. We plan to meet this 
expectation by focusing on our mission while keeping 
our values intact.

According to the American Gas Association, a study 
published in Environmental Science & Technology led by 
a team from Washington State University found that 
emission estimates from local natural gas distribution 
systems in cities and towns throughout the U.S. have 
decreased in the past 20 years to levels 36 to 70 percent 
lower than the 2011 U.S. Environmental Protection 
Agency inventory. 

The study concludes that as little as 0.1 percent of the 
natural gas delivered nationwide is emitted from local 
distribution systems. 

ONE Gas is committed to operating in an environmentally 
responsible manner. We are accountable for providing 
services that are aligned with efforts to reduce emissions.

In 2015, we retired or replaced approximately 425 miles 
of distribution and transmission facilities, which will result 
in decreased emissions of methane.

Commitment to the Methane 
Challenge Program

In 2015, ONE Gas actively participated in the 
development of the U.S. Environmental Protection 
Agency (EPA) Natural Gas STAR Methane Challenge 
Program to voluntarily reduce greenhouse gas emissions.

The program is a flexible, voluntary partnership with 
natural gas companies and the EPA to promote and 
track the reduction of methane emissions beyond what 
is federally required.

The program requires a signed commitment to reduce 
emissions through a Best Management Practice 
Commitment, a companywide implementation of 
best practices focused on reducing emissions from 
key sources.

Energy Efficiency

In 2015, our Energy Efficiency Program in Oklahoma 
and the Austin Conservation Program in Texas issued 
more than 67,800 rebates combined – totaling 
approximately $11.15 million in energy-efficiency 
customer rebates on natural gas appliances and energy-
efficient home improvements.

Wildlife and Endangered 
Species Preservation 

We are committed to working to resolve any potential 
issues with endangered species, migratory birds, cultural 
or historical assets and government agency permitting 
requirements. We not only follow the regulations but also 
work with our subcontractors and consultants to do 
the same.

14

15

Forward-looking Statements

Statements contained in this annual report that include company 
expectations or predictions should be considered forward-looking 
statements that are covered by the safe harbor provisions of the 
Securities Act of 1933 and the Securities Exchange Act of 1934, 
as amended.

It is important to note that the actual results could differ materially 
from those projected in such forward-looking statements.

For additional information that could cause actual results to differ 
materially from such forward-looking statements, refer to ONE Gas’ 
Securities and Exchange Commission fi lings.

Shareholder Information

Wells Fargo Shareowner Services
P.O. Box 64874
St. Paul, MN 55164-0856 
P: 1-855-217-6403
P: (Outside U.S.) 1-651-450-4064
TDD number: 1-651-450-4144
www.shareowneronline.com

Direct Stock Purchase & Dividend Reinvestment Plan
ONE Gas’ Direct Stock Purchase and Dividend Reinvestment Plan 
provides new investors and current shareholders a convenient way to 
purchase ONE Gas common stock without paying processing fees or 
service charges and to reinvest cash dividends. For more information 
or to enroll in the plan, call Wells Fargo at 1-855-217-6403. The 
Prospectus is also available at www.onegas.com.

Annual Meeting Details
First Place Tower
15 East Fifth Street
Tulsa, OK 74103

May 26, 2016 – 9 a.m. CDT

Auditors 
PricewaterhouseCoopers LLP
Two Warren Place
6120 South Yale Avenue, Suite 1850
Tulsa, OK 74136

Corporate Headquarters
First Place Tower 
15 East Fifth Street
Tulsa, OK 74103

Credit Ratings
Moody’s: A2 (Stable)
Standard & Poor’s: A- (Stable)

Investor Relations
ONE Gas Investor Relations 
Department
P.O. Box 21049
Tulsa, OK 74121
P: 1-855-496-0200
E: IR@onegas.com 

Andrew Ziola, Vice President, 
Investor Relations and Public Affairs
P: 1-918-947-7163
E: andrew.ziola@onegas.com

Board of Directors

From left to right:

Douglas H. Yaeger
Retired Chairman, President and Chief Executive Offi  cer, Laclede Gas Company 

John W. Gibson
Chairman, ONE Gas, Inc.

Eduardo A. Rodriguez
President, Strategic Communications Consulting Group

Robert B. Evans
Retired President and Chief Executive Offi  cer, Duke Energy Americas

Pattye L. Moore
Chairman, Red Robin Gourmet Burgers

Pierce H. Norton II
President and Chief Executive Offi  cer, ONE Gas, Inc.

Michael G. Hutchinson
Retired Partner, Deloitte & Touche

Executive Team

Joseph L. McCormick, 56
Senior Vice President, General 
Counsel and Assistant Secretary

Caron A. Lawhorn, 55
Senior Vice President, Commercial

Robert S. McAnnally, 52
Senior Vice President, Operations

Mark A. Bender, 51
Senior Vice President, 
Administration,
Chief Information Offi  cer

Andrew J. Ziola, 46
Vice President, 
Investor Relations and 
Public Aff  airs

Pierce H. Norton II, 56
President and Chief 
Executive Offi  cer

Curtis L. Dinan, 48
Senior Vice President, 
Chief Financial Offi  cer 
and Treasurer

16

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-K

X ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2015.
OR
__ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from __________ to __________.

Commission file number   001-36108

ONE Gas, Inc.

(Exact name of registrant as specified in its charter)

Oklahoma
(State or other jurisdiction of
incorporation or organization)

46-3561936
(I.R.S. Employer Identification No.)

15 East Fifth Street, Tulsa, OK
(Address of principal executive offices)

74103
(Zip Code)

Registrant’s telephone number, including area code   (918) 947-7000

Securities registered pursuant to Section 12(b) of the Act:

Common stock, par value of $0.01
(Title of each class)

New York Stock Exchange
(Name of each exchange on which registered)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes X No__

Securities registered pursuant to Section 12(g) of the Act:  None

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes __  No X

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during 
the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for 
the past 90 days.  Yes X  No __

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be 
submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the 
registrant was required to submit and post such files).  Yes X No _

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Registration S-K (§229.405 of this chapter) is not contained herein, and will 
not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or 
any amendment to this Form 10-K. X

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the 
definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.  (Check one) Large accelerated 
filer X  Accelerated filer __ 

Smaller reporting company __

Non-accelerated filer __ 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes__ No X

The aggregate market value of the equity securities held by nonaffiliates based on the closing trade price of the registrant on June 30, 2015, was $2.1 billion.

On February 5, 2016, we had 52,292,154 shares of common stock outstanding.

Portions of the definitive proxy statement to be delivered to shareholders in connection with the Annual Meeting of Shareholders to be held May 26, 2016, are 
incorporated by reference in Part III.

DOCUMENTS INCORPORATED BY REFERENCE: 

 
 
 
 
 
 
 
ONE Gas, Inc.
2015 ANNUAL REPORT

Page No.

Part I.

Item 1.

Item 1A.

Item 1B.

Item 2.

Item 3.

Item 4.

Part II.

Item 5.

Item 6.

Item 7.

Business

Risk Factors

Unresolved Staff Comments

Properties

Legal Proceedings

Mine Safety Disclosures

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases
of Equity Securities

Selected Financial Data

Management’s Discussion and Analysis of Financial Condition and Results of Operations 

Item 7A.

Quantitative and Qualitative Disclosures about Market Risk

Item 8.

Item 9.

Item 9A.

Item 9B.

Part III.

Item 10.

Item 11.

Item 12.

Item 13.

Item 14.

Part IV.

Item 15.

Signatures

Financial Statements and Supplementary Data

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Controls and Procedures

Other Information

Directors, Executive Officers and Corporate Governance

Executive Compensation

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder
Matters

Certain Relationships and Related Transactions, and Director Independence

Principal Accounting Fees and Services

Exhibits, Financial Statement Schedules

5

13

23

23

24

24

25

27

27

43

45

82

82

82

82

83

83

84

84

85

89

As used in this Annual Report, references to “we,” “our,” “us” or the “company” refer to ONE Gas, Inc., an Oklahoma 
corporation, and its predecessors and subsidiary, unless the context indicates otherwise.

2

GLOSSARY

The abbreviations, acronyms and industry terminology used in this Annual Report are defined as follows:

ACA
AFUDC
Annual Report
ATSR
Bcf
Bcf/d
CERCLA

CFTC
Clean Air Act
Clean Water Act
Code
COG
COGR
COSA
DOT
Dth
EPA
EPARR
EPS
EPSA
Exchange Act
FERC
GAAP
GRIP
GSRS
Heating Degree Day or HDD

IFRS
IRS
IRS Ruling
KCC
KDHE
LDCs
LIBOR
Moody’s
MMcf
NYSE
OCC
ONE Gas
ONE Gas Credit Agreement

ONE Gas Predecessor

ONEOK
ONEOK Partners
OSHA
PBRC
PGA

Annual Cost Adjustment
Allowance for funds used during construction
Annual Report on Form 10-K for the year ended December 31, 2015
Ad Valorem Tax Surcharge Rider
Billion cubic feet
Billion cubic feet per day
Federal Comprehensive Environmental Response, Compensation and Liability Act
of 1980, as amended
Commodities Futures Trading Commission
Federal Clean Air Act, as amended
Federal Water Pollution Control Amendments of 1972, as amended
Internal Revenue Code of 1986, as amended
Cost of gas
Cost of gas rider
Cost-of-Service Adjustment
United States Department of Transportation
Dekatherm
United States Environmental Protection Agency
El Paso Annual Rate Review
Earnings per share
El Paso Service Area
Securities Exchange Act of 1934, as amended
Federal Energy Regulatory Commission
Accounting principles generally accepted in the United States of America
Texas Gas Reliability Infrastructure Program
Gas System Reliability Surcharge
A measure designed to reflect the demand for energy needed for heating based on
the extent to which the daily average temperature falls below a reference
temperature for which no heating is required, usually 65 degrees Fahrenheit

International Financial Reporting Standards
U.S. Internal Revenue Service
Private Letter Ruling from IRS
Kansas Corporation Commission
Kansas Department of Health and Environment
Local distribution companies
London Interbank Offered Rate
Moody’s Investors Service, Inc.
Million cubic feet
New York Stock Exchange
Oklahoma Corporation Commission
ONE Gas, Inc.
ONE Gas’ $700 million revolving credit agreement, which expires in January 
2019

ONE Gas’ predecessor for accounting purposes that consists of the business
attributable to ONEOK’s natural gas distribution segment that was transferred to
ONE Gas in connection with its separation from ONEOK
ONEOK, Inc. and its subsidiaries
ONEOK Partners, L.P. and its subsidiaries
Occupational Safety and Health Administration
Performance-Based Rate Change
Purchased Gas Adjustment

3

PHMSA

Pipeline Safety Improvement Act
Pipeline Safety, Regulatory Certainty and 
Job Creation Act
ROE

RRC
S&P
SEC
Securities Act
Separation and Distribution Agreement

TAC
Tax Matters Agreement
Transition Services Agreement

WNA
XBRL

United States Department of Transportation Pipeline and Hazardous Materials
Safety Administration
Pipeline Safety Improvement Act of 2002, as amended
Pipeline Safety, Regulatory Certainty and Job Creation Act of 2011, as amended

Return on equity calculated consistent with utility ratemaking principles in each
jurisdiction in which we operate
Railroad Commission of Texas
Standard and Poor’s Rating Services
Securities and Exchange Commission
Securities Act of 1933, as amended
Separation and Distribution Agreement dated January 14, 2014, between ONEOK
and ONE Gas
Temperature Adjustment Clause
Tax Matters Agreement dated January 14, 2014, between ONEOK and ONE Gas
Transition Services Agreement dated January 14, 2014, between ONEOK
and ONE Gas
Weather normalization adjustments
eXtensible Business Reporting Language

The statements in this Annual Report that are not historical information, including statements concerning plans and objectives 
of management for future operations, economic performance or related assumptions, are forward-looking statements.  
Forward-looking statements may include words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” 
“believe,” “should,” “goal,” “forecast,” “guidance,” “could,” “may,” “continue,” “might,” “potential,” “scheduled” and 
other words and terms of similar meaning.  Although we believe that our expectations regarding future events are based on 
reasonable assumptions, we can give no assurance that such expectations and assumptions will be achieved.  Important factors 
that could cause actual results to differ materially from those in the forward-looking statements are described under Part I, 
Item 1A, “Risk Factors,” and Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of 
Operation and “Forward-Looking Statements,” in this Annual Report.

4

ITEM 1. 

BUSINESS

SEPARATION FROM ONEOK, INC.

PART I

On January 8, 2014, ONEOK’s board of directors approved the distribution of all the shares of our common stock to holders of 
ONEOK common stock.  

In order for ONEOK to effect the distribution, we requested, and the SEC declared effective, our Registration Statement on 
Form 10 on January 10, 2014.  ONEOK transferred all of the assets and liabilities primarily related to its natural gas 
distribution business to us.  Assets and liabilities included accounts receivable and payable, natural gas in storage, regulatory 
assets and liabilities, pipeline and other natural gas distribution facilities, customer deposits, employee-related assets and 
liabilities, including amounts attributable to pension and other postemployment benefits, tax-related assets and liabilities and 
other assets and liabilities primarily associated with providing natural gas distribution service in Oklahoma, Kansas and Texas.  
Cash and certain corporate assets, such as office space in the corporate headquarters and certain IT hardware and software, 
were not transferred to us; however, the Transition Services Agreement between ONEOK and us provided temporary access to 
such corporate assets as necessary to operate our business prior to obtaining applicable corporate assets on our own.  

Immediately prior to the contribution of the natural gas distribution business to us, ONEOK contributed to the capital of the 
natural gas distribution business all of the amounts outstanding on the natural gas distribution business’s short-term note 
payable to and long-term line of credit with ONEOK.  We received approximately $1.19 billion of cash from a private 
placement of senior notes (which were later exchanged for registered notes), then used a portion of those proceeds to fund a 
cash payment of approximately $1.13 billion to ONEOK.  On January 31, 2014, ONEOK distributed one share of our common 
stock for every four shares of ONEOK common stock held by ONEOK shareholders of record as of the close of business on 
January 21, 2014, the record date of the distribution.  At the close of business on January 31, 2014, ONE Gas became an 
independent, publicly traded company as a result of the distribution.  Our common stock began trading “regular-way” under the 
ticker symbol “OGS” on the NYSE on February 3, 2014.  ONEOK did not retain any ownership interest in our company.

OUR BUSINESS

We are an independent, publicly traded, 100 percent regulated natural gas distribution utility.  We are one of the largest natural 
gas utilities in the United States.  We are an Oklahoma corporation and are the successor to the company founded in 1906 as 
Oklahoma Natural Gas Company.  We are the largest natural gas distributor in Oklahoma and Kansas and the third largest in 
Texas, providing service as a regulated public utility.  We serve residential, commercial and industrial, transportation and 
wholesale and public authority customers in all three states.  Our largest natural gas distribution markets in terms of customers 
are Oklahoma City and Tulsa, Oklahoma; Kansas City, Wichita and Topeka, Kansas; and Austin and El Paso, Texas.  Our three 
divisions, Oklahoma Natural Gas, Kansas Gas Service and Texas Gas Service, distribute natural gas as public utilities to 
approximately 88 percent, 72 percent and 14 percent of the natural gas distribution customers in Oklahoma, Kansas and Texas, 
respectively. 

Prior to our separation from ONEOK, our financial statements were derived from ONEOK’s financial statements, which 
included its natural gas distribution business as if we, for accounting purposes, had been a separate company for all periods 
presented.  The assets and liabilities in the financial statements have been reflected on a historical basis.  The financial 
statements for periods prior to the separation also include expense allocations for certain corporate functions historically 
performed by ONEOK, including allocations of general corporate expenses related to executive oversight, accounting, treasury, 
tax, legal, information technology and other services.  We believe our assumptions underlying the financial statements, 
including the assumptions regarding the allocation of general corporate expenses from ONEOK, are reasonable.  However, the 
financial statements may not include all of the actual expenses that would have been incurred by us and may not reflect our 
results of operations, financial position and cash flows had we been a separate publicly traded company during the periods 
presented prior to the separation.

5

OUR STRATEGY

Our business strategy is focused on operating our systems in a safe, reliable and environmentally responsible manner, growing 
our business strategically, while delivering quality customer service to our customers.  Over time, we believe this will enable us 
to generate a competitive total return for our shareholders and maintain our financial stability, leading to our strategic goals of 
zero harm and a fair return.  We intend to accomplish our objectives by executing on the strategies listed below: 

• 

Focus on Safety, Reliability and Compliance - We are committed to pursuing a zero-incident safety and compliance 
culture through programs, procedures, policies, guidelines and other internal controls designed to mitigate risk and 
incidents that may harm our employees, contractors, customers, the public or the environment.  In addition, a 
significant portion of our capital spending is focused on the safety, reliability and efficiency of our natural gas 
distribution system.  We are committed to compliance with all federal, state and local laws and regulations.  

•  High-performing Workforce - The foundation of our company consists of our employees.  We are committed to 

attracting, retaining and developing a high-performing workforce where every employee understands that they can and 
do make a difference.  We embrace and promote inclusion, diversity and collaboration.  We expect a high standard of 
performance from our employees.  We encourage our workforce to measure their productivity and be accountable for 
the best work possible.  Each day that we do our best to safely and efficiently meet the needs of our customers is a day 
that leads to individual success and, ultimately, the success of the company.

• 

Increase Our Achieved ROE - We continually seek to improve our achieved ROE through improved operational 
performance and regulatory mechanisms.  The difference between our achieved and allowed ROE is related primarily 
to regulatory lag.  We make investments that increase our rate base and we incur increases in our costs that are above 
the amounts reflected in the rates we charge for our service.  

We have several initiatives underway to improve our operational performance.  These initiatives include leveraging 
and implementing technology that is expected to result in increased efficiency, thereby helping reduce the rate of 
increase in operating expenses. 

Our focus on our credit metrics and maintaining a balanced approach to capital management are significant objectives 
in providing reasonable rates to customers while also providing a fair return to shareholders.  We believe that 
maintaining an investment-grade credit rating is prudent for our business as we seek to access the capital markets to 
finance capital investments.  As a 100 percent regulated utility, we intend to maintain strong credit metrics while we 
pursue a balanced approach to capital investment and a return of capital to shareholders via a dividend that we believe 
will be competitive with our peer group. 

•  Advocate Constructive Relationships with Key Stakeholders - We plan to continue our constructive, transparent 
relationships with our key stakeholders, which include our customers, employees, investors and regulators.  Our 
strategy includes seeking outcomes in future rate proceedings that provide a fair return on our infrastructure 
investments, while also meeting the needs of our customers through safe, reliable and efficient service. 

• 

Identify and Pursue Growth Opportunities - Our growth opportunities are a result of capital investments related to 
safety and reliability of our existing system, and system growth related to the economic and population growth in our 
service territories.  As a result of our commitment to enhance the integrity, reliability and safety of our existing 
infrastructure, we are making significant investments in our existing system, which we expect to further grow our rate 
base.  In addition, as our service territories continue to experience economic growth, we expect to grow our rate base 
through capital investments in new service lines and main line extensions, predominately in the major metropolitan 
areas.  

We believe that the competitiveness of natural gas is increasing, creating new market opportunities for natural gas as 
an energy source within our existing service territories.  

We remain committed to maintaining our status as a 100 percent regulated company, but will evaluate strategic 
acquisition opportunities that fall within that guideline based on our disciplined financial and operating approach, 
while weighing these alternatives against future investment opportunities with respect to our existing rate base. 

6

REGULATORY OVERVIEW

We are subject to the regulations and oversight of the state and local regulatory authorities of the territories in which we 
operate. Rates and charges for natural gas distribution services are established by the OCC for Oklahoma Natural Gas and by 
the KCC for Kansas Gas Service.  Texas Gas Service is subject to regulatory oversight by the various municipalities that it 
serves, which have primary jurisdiction in their respective areas.  Rates in unincorporated areas of Texas and all appellate 
matters are subject to regulatory oversight by the RRC.  These regulatory authorities have the responsibility of ensuring that the 
utilities in their jurisdictions provide safe and reliable service at a reasonable cost, while providing utility companies the 
opportunity to earn a fair and reasonable return on their investments. 

Generally, our rates and charges are established in rate case proceedings.  Regulatory authorities may also approve mechanisms 
that allow for adjustments for specific costs or investments made between rate cases.  Due to the nature of the regulatory 
process, there is an inherent lag between the time that we make investments or incur additional costs and the setting of new 
rates and/or charges to recover those investments or costs.  Additionally, we are not allowed recovery of certain costs we incur.  
The delay between the time investments are made or increases in costs are incurred and the time that our rates are adjusted to 
reflect these investments and costs is referred to as regulatory lag.  

The following provides additional detail on the regulatory mechanisms in the jurisdictions we serve.

Oklahoma - Oklahoma Natural Gas currently operates under a PBRC mechanism, which provides for streamlined annual rate 
reviews between rate cases and includes adjustments for incremental capital investment and allowed expenses.  Under this 
mechanism, we have an allowed ROE of between 9 percent and 10 percent.  If our achieved ROE is below 9 percent, our base 
rates are increased upon OCC approval to an amount necessary to restore the ROE to 9.5 percent.  If our achieved ROE 
exceeds 10 percent, the portion of the earnings above 10 percent is shared with our customers, who receive the benefit of 75 
percent of the earnings above 10 percent. We receive the benefit of the remaining 25 percent.  Oklahoma Natural Gas is 
required to file a rate case on or before June 20, 2021, based on a test year consisting of the twelve months ending December 
31, 2020.  Other regulatory mechanisms in Oklahoma include the following: 

• 

PGA Clause - Oklahoma Natural Gas’ commodity, transportation, storage and gas purchase operations and 
maintenance costs are passed through to its sales customers without markup via the PGA.  Any costs associated with 
natural gas that is lost, used or unaccounted for in operations and the fuel-related portion of bad debts are also 
recovered through the PGA. 

•  TAC - The TAC is designed to reduce the delivery charge component of customers’ bills for the additional volumes 
used when the actual heating degree days exceed the normalized heating degree days and to increase the delivery 
charge component of customers’ bills for volumes not used when actual heating degree days are less than the normal 
heating degree days.  The TAC is in effect from November through April. 

•  Energy Efficiency Programs - Oklahoma Natural Gas has an Energy-Efficiency Program, available to all of its sales 

customers.  The costs associated with these programs and an incentive to offer these programs are recovered through a 
monthly surcharge on customer bills.  Oklahoma Natural Gas collects approximately $11.5 million each year from 
sales customers to fund the program, which provides appliance rebates, education and heating system check-ups to 
promote energy efficiency.     

•  Rate Design for Residential Customers - Oklahoma Natural Gas is authorized to utilize a rate structure with two 

choices.  Rate Choice “A” is designed for customers whose annual normalized volume is less than 50 Dth.  The tariff 
for these customers contains both a fixed monthly service charge and a per Dth delivery fee.  Although a portion of the 
net margin for customers in Rate Choice “A” is dependent on usage, these customers use relatively small quantities of 
natural gas and therefore the net margin that is dependent on usage is not significant.  The fixed monthly residential 
customer charge for Oklahoma Natural Gas is $16.43, with a delivery fee of $4.1143 per Dth for Rate Choice “A” 
customers.  Rate Choice “B” is designed for customers whose annual normalized volume is 50 Dth or greater.  The 
tariff for these customers contains only a fixed monthly service charge of $33.57. At December 31, 2015, 71 percent of 
Oklahoma Natural Gas’ residential customers are on Rate Choice “B.” 

•  Rate Design for Commercial and Industrial Customers - Oklahoma Natural Gas is authorized to utilize a rate structure 
with two different rate choices for its Small Commercial and Industrial, or SCI, customers.  Rate Choice “A” is 
designed for SCI customers whose annual normalized volume is less than 40 Dth.  The tariff for these customers 
contains both a fixed monthly service charge of $20.55 and a delivery fee of $4.5599 per Dth.  Rate Choice “B” is 
designed for SCI customers whose annual normalized volume is 40 Dth or greater but less than 150 Dth.  The tariff for 
these customers contains only a fixed monthly service charge of $35.75.  All of Oklahoma Natural Gas’ Large 
Commercial and Industrial, or LCI, customers, whose annual volume is 150 Dth or greater, but less than 5,000 Dth, 
are on a fixed monthly service charge of $93.22.  At December 31, 2015, 75 percent of Oklahoma Natural Gas’ 
commercial and industrial customers are on either SCI Rate Choice “B” or LCI. 

7

•  Compressed Natural Gas Rebate Program - The CNG Rebate Program is designed to promote and support the CNG 
market in the state of Oklahoma by offering rebates to Oklahoma residents who purchase dedicated and bi-fueled 
natural gas vehicles or install residential CNG fueling stations.  The rebates are funded by a $0.25 per gasoline gallon 
equivalent surcharge that Oklahoma Natural Gas is authorized to collect on fuel purchased from a CNG dispenser 
owned by Oklahoma Natural Gas.  Collections from the surcharge to fund the program were not material in 2015.

For the year ended December 31, 2015, approximately 87 percent of Oklahoma Natural Gas’ net margin from its sales 
customers was recovered from fixed charges. 

Kansas - Kansas Gas Service operates under a traditional regulatory framework, whereby periodic rate cases are filed with the 
KCC as needed to increase base rates to give Kansas Gas Service the opportunity to earn its authorized ROE.  Other regulatory 
mechanisms in Kansas include the following: 

•  COGR and ACA - These mechanisms allow Kansas Gas Service to recover the actual cost of the natural gas it sells to 
its customers.  The COGR includes a monthly estimate of the cost Kansas Gas Service incurs in transporting, storing 
and purchasing natural gas supply for its sales customers, the ACA and other charges and credits.  The ACA is an 
annual component of the COGR that compares the cost of gas recovered through the COGR for the preceding year 
with the actual natural gas supply costs and the fuel-related portion of bad debts for the same period.  Any over- or 
under-recovery is reflected in the subsequent year’s COGR. 

•  WNA Clause - This mechanism allows Kansas Gas Service to accrue the variation in net margin due to abnormal 
weather occurring from November through March.  WNA is designed to reduce the delivery charge component of 
customers’ bills for the additional volumes used when the actual heating degree days exceed the normalized heating 
degree days and to increase the delivery charge component of customers’ bills for the reduction in volumes used when 
actual heating degrees days are less than the normal heating degree days.  Once a year, the amount of the adjustment is 
determined and is then applied to customers’ bills over the subsequent 12-month period. 

•  ATSR - This rider allows Kansas Gas Service to recover the difference each year between the property tax costs 

included in its base rates and its actual property tax costs incurred without having to file a rate case.  The amount of 
the adjustment is determined annually and recovered over the subsequent 12 months as a change in the delivery-
charge component of customers’ bills. 
Pension and Other Postemployment Benefits Trackers - These trackers allow Kansas Gas Service to track and defer 
for recovery in its next rate case the difference between the pension and other postemployment benefit costs included 
in base rates and actual expense as determined in accordance with GAAP. 

• 

•  GSRS - This surcharge allows Kansas Gas Service to file for a rate adjustment providing a recovery of and return on 
qualifying infrastructure investments, such as expenditures necessary to meet state and federal pipeline safety 
requirements and government-required relocation projects incurred, each year between rate case filings. However, rate 
adjustment filings cannot increase a monthly charge more than $0.40 per residential customer over the most recent 
GSRS filing.  After five annual filings, Kansas Gas Service is required to file a rate case or cease collection of the 
surcharge.

The fixed monthly residential customer charge for Kansas Gas Service is $15.35.  For the year ended December 31, 2015, 
approximately 55 percent of Kansas Gas Service’s net margin from its sales customers was recovered from fixed charges.  
Kansas experiences the highest heating degree days of all of our service territories, which brings a level of stability to net 
margin even though a significant portion is based on usage. 

Texas - Texas Gas Service has grouped its customers into 10 service areas.  These service areas are further divided into the 
incorporated cities and the unincorporated areas, referred to as the environs.  The incorporated cities in the service areas have 
original jurisdiction, with the RRC having appellate authority, and the RRC has original jurisdiction for the environs.  Periodic 
rate cases are filed with the cities or the RRC, as needed, to give Texas Gas Service the opportunity to earn its authorized ROE.  
Other regulatory mechanisms and constructs in Texas include the following: 

•  GRIP Statute - For the incorporated cities in three service areas and the environs for four service areas, comprising 44 
percent of Texas Gas Service’s customers, Texas Gas Service makes an annual filing under the GRIP statute, which 
allows it to recover taxes and depreciation and to earn a return on the annual net increase in investment for the service 
area.  After five annual GRIP filings, Texas Gas Service is required to file a full rate case.  A full rate case may be filed 
at shorter intervals if desired by either Texas Gas Service or the regulator. 

•  COSA Filings - In six service areas, comprising 17 percent of its customers, Texas Gas Service makes an annual 
COSA filing for the incorporated cities.  COSA tariffs permit Texas Gas Service to recover return, taxes and 
depreciation on the annual increases in net investment, as well as annual increases or decreases in certain expenses and 

8

revenues.  Five of the COSAs have a cap of 3.5 percent to 5 percent on all or a portion of the increase.  A full rate case 
may be filed when desired by Texas Gas Service or the regulator, but is not required.

•  EPARR Filings - In the EPSA, comprising 35 percent of its customers, Texas Gas Service makes an annual rate review 

filing for the incorporated cities.  The annual rate review tariff permits Texas Gas Service to recover return, taxes and 
depreciation on the annual increases in net investment, as well as annual increases or decreases in certain expenses and 
revenues.  There is no cap on the amount of the increase, but the request is subject to review and possible adjustment 
by the regulator.  Upon notice, a full rate case may be filed by Texas Gas Service or the regulator, but is not required.  
In November 2015, Texas Gas Service notified the cities in the EPSA that it would be filing a full rate case in 2016.
•  WNA Clause - Texas Gas Service employs WNA clauses in eight of its service areas, comprising 62 percent of its 

customers.  In one of the service areas without WNA, which comprises 38 percent of its customers, Texas Gas Service 
recovers 88 percent of its delivery charge from fixed charges, making revenues in this service area less weather 
sensitive.  WNA is designed to reduce the delivery charge component of customers’ bills for the additional volumes 
used when the actual heating degree days exceed the normalized heating degree days and to increase the margin 
component of customers’ bills for the reduction in volumes used when actual heating degree days are less than the 
normal heating degree days.  The WNA is in effect from September through May. 

•  COG Clause - In all service areas, Texas Gas Service recovers 100 percent of its gas costs, including interest on 

natural gas in storage and the natural gas cost component of bad debts, via a COG mechanism, subject to a limitation 
of 5 percent on lost-and-unaccounted-for natural gas.  The COG is reconciled annually to compare the gas costs 
recovered through the COG with the actual natural gas supply costs.  Any over- or under-recovery is refunded or 
recovered, as applicable, in the subsequent year. 
Pension and Other Postemployment Benefits - Texas Gas Service is authorized by statute to defer pension and other 
postemployment benefit costs that exceed the amount recovered in base rates, and to seek recovery of the deferred 
costs in a future rate case. 
Pipeline-Integrity Testing Riders - Texas Gas Service recovers approximately 90 percent of its pipeline-integrity 
testing expenses via riders, COSAs and the EPARR filing, with the remainder included in base rates. 
Safety-Related Plant Replacements - Texas Gas Service is authorized by RRC rule to defer interest cost, taxes and 
depreciation expense on safety-related plant replacements from the time the replacements are in service until the plant 
is reflected in base rates, and to seek recovery of those accrued amounts in a future rate proceeding. 

• 

• 

• 

•  Energy Conservation Program - Texas Gas Service has an Energy Conservation Program in its Central Texas service 

area, comprising 34 percent of total customers.  Texas Gas Service collects approximately $3 million per year from 
customers to fund the program, which provides energy audits, weatherization and appliance rebates to promote energy 
conservation. 

The average fixed monthly residential customer charge for Texas Gas Service is $15.41, and for the year ended December 31, 
2015, approximately 72 percent of Texas Gas Service’s net margin from its sales customers was recovered from fixed charges. 

MARKET CONDITIONS AND SEASONALITY

Supply - We purchased 157 Bcf and 180 Bcf of natural gas supply in 2015 and 2014, respectively.  The decrease in 2015 
resulted primarily from lower supply requirements due to warmer temperatures as compared with 2014.  Our natural gas supply 
portfolio consists of long-term, seasonal and short-term contracts from a diverse group of suppliers.  We award these contracts 
through competitive-bidding processes to ensure reliable and competitively priced natural gas supply.  We acquire our natural 
gas supply from natural gas processors, marketers and producers.  

An objective of our supply-sourcing strategy is to provide value to our customers through reliable, competitively priced and 
flexible natural gas supply and transportation from multiple production areas and suppliers.  This strategy is designed to 
mitigate the impact on our supply from physical interruption, financial difficulties of a single supplier, natural disasters and 
other unforeseen force majeure events, as well as to ensure these resources are reliable and flexible to meet the variations of 
customer demands. 

We do not anticipate problems with securing natural gas supply to satisfy customer demand; however, if supply shortages were 
to occur, we have curtailment tariff provisions in place that allow us to reduce or discontinue natural gas service to large 
industrial users and to request that residential and commercial customers reduce their natural gas requirements to an amount 
essential for public health and safety.  In addition, during times of critical supply disruptions, curtailments of deliveries to 
customers with firm contracts may be made in accordance with guidelines established by appropriate federal, state and local 
regulatory agencies. 

9

Natural gas supply requirements are affected by weather conditions.  In addition, economic conditions impact the requirements 
of our commercial and industrial customers.  Natural gas usage per residential customer may decline as customers change their 
consumption patterns in response to a variety of factors, including: 

•  more volatile and higher natural gas prices; 
• 

customers’ improving the energy efficiency of existing homes by replacing doors and windows, adding insulation, and 
replacing appliances with more efficient appliances; 

•  more energy-efficient construction; and 
• 

fuel switching from natural gas to electricity. 

In each jurisdiction in which we operate, changes in customer-usage profiles are considered in the periodic redesign of our 
rates. 

As of December 31, 2015, we had 50.4 Bcf of natural gas storage capacity under lease with remaining terms ranging from one 
to ten years and maximum allowable daily withdrawal capacity of approximately 1.3 Bcf.  This storage capacity allows us to 
purchase natural gas during the off-peak season and store it for use in the winter periods.  This storage is also needed to assure 
the reliability of gas deliveries during peak demands for natural gas.  Approximately 25 percent of our winter natural gas supply 
needs for our sales customers is expected to be supplied from storage. 

In managing our natural gas supply portfolios, we partially mitigate price volatility using a combination of financial derivatives 
and natural gas in storage.  We have natural gas financial hedging programs that have been authorized by the regulatory 
authorities in each state in which we do business.  We do not utilize financial derivatives for speculative purposes, nor do we 
have trading operations associated with our business.  

Demand - See discussion below under “Seasonality,” “Competition” and “Compressed Natural Gas” for factors affecting 
demand for our services. 

Seasonality - Natural gas sales to residential and commercial customers are seasonal, as a substantial portion of their natural 
gas requirements are for heating.  Accordingly, the volume of natural gas sales is higher normally during the months of 
November through March than in other months of the year.  The impact on our margins resulting from weather temperatures 
that are above or below normal is offset partially through our TAC and WNA mechanisms.  See discussion above under 
“Regulatory Overview.” 

Competition - We encounter competition based on customers’ preference for natural gas, compared with other energy 
alternatives and their comparative prices.  We compete to supply energy for space and water heating, cooking, clothes drying 
and other general energy needs.  Significant energy usage competition occurs between natural gas and electricity in the 
residential and small commercial markets.  Customers and builders typically make the decision on the type of equipment, and 
therefore the energy source, at initial installation, generally locking in the chosen energy source for the life of the equipment.  
Changes in the competitive position of natural gas relative to electricity and other energy alternatives have the potential to 
cause a decline in consumption of natural gas or in the number of natural gas customers. 

The Department of Energy issued a statement of policy that it will use full fuel-cycle measures of energy use and emissions 
when evaluating energy-conservation standards for appliances.  In addition, the EPA has determined that source energy is the 
most equitable unit for evaluating energy consumption.  Assessing energy efficiency in terms of a full fuel-cycle or source-
energy analysis, which takes all energy use into account, including transmission, delivery and production losses, in addition to 
energy consumed at the site, highlights the high overall efficiency of natural gas in residential and commercial uses compared 
with electricity. 

10

The below table contains data related to the cost of our delivered gas relative to electricity based on current market conditions: 

Natural Gas vs. Electricity

Oklahoma

Kansas

Texas

Average retail price of electricity / kWh(1)
Natural gas price equivalent of electricity / Dth(1)
ONE Gas delivered cost of natural gas / Dth(2)
Natural gas advantage ratio(3)
(1) Source: United States Energy Information Agency, www.eia.gov, for the eleven-month period ended November 30, 2015. 
(2) Represents the average delivered cost of natural gas to a residential customer, including the cost of the natural gas supplied, fixed customer charge, delivery 
charges and charges for riders, surcharges and other regulatory mechanisms associated with the services we provide, for the year ended December 31, 2015. 
(3) Calculated as the ratio of the natural gas price equivalent per dekatherm of the average retail price of electricity per kilowatt hour to the ONE Gas delivered 
average cost of natural gas per dekatherm. 

11.67¢
34.20
10.39
3.3x

12.31¢
36.08
9.98
3.6x

10.09¢
29.57
9.29
3.2x

$
$

$
$

$
$

We are subject to competition from other pipelines for our large industrial and commercial customers, and this competition has 
and may continue to impact margins.  Under our transportation tariffs, qualifying industrial and commercial customers are able 
to purchase their natural gas needs from the supplier of their choice and have us transport it for a fee.  A portion of the 
transportation services that we provide are at negotiated rates that are below the maximum approved transportation tariff rates.  
Reduced-rate transportation service may be negotiated when a competitive pipeline is in close proximity or another viable 
energy option is available to the customer.  Increased competition could potentially lower these rates.

Compressed Natural Gas (CNG) - In meeting increased interest in CNG for motor vehicle transportation, particularly from fleet 
operators, we have been developing an incremental source of transportation revenue by supplying natural gas to CNG fueling 
stations.  The benefits of these programs are increased natural gas load, which could help mitigate future residential rate 
increases, enhanced competitive position and increased customer satisfaction.  As of December 31, 2015, we supply 129 
fueling stations, 30 of which we operate.  Of the 99 remaining stations, we provide supply to 56 retail and 43 private CNG 
stations.  We transported 2.3 million Dth to CNG stations in 2015, which represents an increase of 14 percent compared with 
2014.

We will continue to support industry efforts to encourage development of more vehicle options by car and truck manufacturers, 
to support third-party investment in CNG fueling stations and to continue tax incentives for CNG.  We continue to deploy a 
minimum amount of capital to connect CNG stations and allow the free market to build and operate the stations. 

ENVIRONMENTAL AND SAFETY MATTERS

See Note 14 of the Notes to Financial Statements and Management’s Discussion and Analysis of Financial Condition and 
Results of Operations in this Annual Report for information regarding environmental and safety matters.

EMPLOYEES

We employed approximately 3,400 people at January 29, 2016, including approximately 700 people at Kansas Gas Service who 
are subject to collective bargaining agreements.  The following table sets forth our contracts with collective bargaining units at 
February 1, 2016:

The United Steelworkers

International Brotherhood of Electrical Workers (IBEW)

Union

Approximate
Employees

400

300

Contract Expires

October 28, 2016

June 30, 2017

11

EXECUTIVE OFFICERS OF THE REGISTRANT

All executive officers are elected annually by our Board of Directors and each serves until such person resigns, is removed or is 
otherwise disqualified to serve or until such officer’s successor is duly elected.  Our executive officers listed below include the 
officers who have been designated by our Board of Directors as our Section 16 executive officers.

Name
Pierce H. Norton II

Age*
55

2014 to present

Business Experience in Past Five Years
President, Chief Executive Officer and Director

2013 to 2014

Executive Vice President, Commercial, ONEOK and ONEOK
Partners

2012

2011

Executive Vice President and Chief Operating Officer,
ONEOK and ONEOK Partners

Chief Operating Officer, ONEOK

2009 to 2011

President, ONEOK Distribution Companies, ONEOK

Curtis L. Dinan

48

2014 to present

Senior Vice President, Chief Financial Officer and Treasurer

Joseph L. McCormick

2011 to 2014

Senior Vice President, Natural Gas, ONEOK Partners

2007 to 2011

Senior Vice President, Chief Financial Officer and Treasurer,
ONEOK and ONEOK Partners

2007 to 2011

Board of Directors, ONEOK Partners

56

2014 to present

Senior Vice President, General Counsel and Assistant
Secretary

2008 to 2014

Vice President and Associate General Counsel, ONEOK and
ONEOK Partners

Caron A. Lawhorn

54

2014 to present

Senior Vice President, Commercial

2013 to 2014

Senior Vice President, Commercial, Natural Gas Distribution,
ONEOK

2011 to 2012

President, ONEOK Distribution Companies, ONEOK

2009 to 2011

Senior Vice President, Corporate Planning and Development,
ONEOK and ONEOK Partners

Robert S. McAnnally

52

2015 to present

Senior Vice President, Operations

2012 to 2015

Senior Vice President, Marketing and Customer Service,
Alabama Gas Corporation, a subsidiary of The Laclede
Group, Inc.

2009 to 2012

Vice President, External Affairs,  Energen Corporation

Mark A. Bender

51

2015 to present

Senior Vice President, Administration and Chief Information
Officer

2014 to 2015

Vice President and Chief Information Officer

* As of January 1, 2016

2012 to 2014

Vice President of Information Technology Operations,
Chesapeake Energy Corporation

2010 to 2012

Chief Information Officer, Oral Roberts University

No family relationship exists between any of the executive officers, nor is there any arrangement or understanding between any 
executive officer and any other person pursuant to which the officer was selected.

INFORMATION AVAILABLE ON OUR WEBSITE

We make available, free of charge, on our website (www.onegas.com) copies of our Annual Report, Quarterly Reports on Form 
10-Q, Current Reports on Form 8-K, amendments to those reports filed or furnished to the SEC pursuant to Section 13(a) or 15

12

(d) of the Exchange Act and reports of holdings of our securities filed by our officers and directors under Section 16 of the 
Exchange Act as soon as reasonably practicable after filing such material electronically or otherwise furnishing it to the 
SEC.  Copies of our Code of Business Conduct and Ethics, Corporate Governance Guidelines, Certificate of Incorporation, 
bylaws and the written charters of our Audit Committee, Executive Compensation Committee, Corporate Governance 
Committee and Executive Committee are also available on our website, and we will provide copies of these documents upon 
request.  Our website and any contents thereof are not incorporated by reference into this report.

We also make available on our website the Interactive Data Files required to be submitted and posted pursuant to Rule 405 of 
Regulation S-T.

ITEM 1A. 

RISK FACTORS

Our investors should consider the following risks that could affect us and our business.  Although we have tried to discuss key 
factors, our investors need to be aware that other risks may prove to be important in the future.  New risks may emerge at any 
time, and we cannot predict such risks or estimate the extent to which they may affect our financial performance.  Investors 
should carefully consider the following discussion of risks and the other information included or incorporated by reference in 
this Annual Report, including “Forward-Looking Statements,” which are included in Item 7, “Management’s Discussion and 
Analysis of Financial Condition and Results of Operations.”

RISK FACTORS INHERENT IN OUR BUSINESS

Regulatory actions could impact our ability to earn a reasonable rate of return on our invested capital and to recover fully 
our operating costs. 

In addition to regulation by other governmental authorities, we are subject to regulation by the OCC, KCC, RRC and various 
municipalities in Texas.  These authorities set the rates that we charge our customers for our services.  There can be no 
assurance that we will be able to obtain rate increases or that our authorized rates of return will continue at the current levels.  
We monitor and compare the rates of return we achieve with our allowed rates of return and initiate general and specific rate 
proceedings as needed.  If a regulatory agency were to prohibit us from setting rates that allow for the timely recovery of our 
costs and a reasonable return by significantly lowering our allowed return or adversely altering our cost allocation, rate design 
or other tariff provisions, modifying or eliminating cost trackers, prohibiting recovery of regulatory assets or disallowing 
portions of our expenses, then our earnings could be impacted adversely.  Regulatory proceedings also involve a risk of rate 
reduction, because once a proceeding has been filed, it is subject to challenge by various interveners. 

Further, accounting principles that govern our company permit certain assets that result from the regulatory process to be 
recorded on our Balance Sheets that could not be recorded under GAAP for nonregulated entities.  We consider factors such as 
rate orders from regulators, previous rate orders for substantially similar costs, written approval from the regulators and 
analysis of recoverability by internal and external legal counsel to determine the probability of future recovery of these assets.  
If we determine future recovery is no longer probable, we would be required to write off the regulatory assets at that time, 
which would also adversely affect our results of operations and cash flows.  Regulatory authorities also review whether our 
natural gas costs are prudent and can adjust the amount of our natural gas costs that we pass through to our customers.  If any 
of our natural gas costs were disallowed, our results of operations and cash flows would also be affected adversely. 

In the normal course of business in the regulatory environment, assets are placed in service before regulatory action is taken, 
such as filing a rate case or for interim recovery under a capital tracking mechanism that could result in an adjustment of our 
returns.  Once we make a regulatory filing, regulatory bodies have the authority to suspend implementation of the new rates 
while studying the filing.  Because of this process, we may suffer the negative financial effects of having placed in service 
assets that do not initially earn our authorized rate of return or may not be allowed recovery on such expenditures at all. 

The profitability of our operations is dependent on our ability to recover timely the costs related to providing natural gas 
service to our customers.  However, we are unable to predict the impact that new regulatory requirements will have on our 
operating expenses or the level of capital expenditures and we cannot assure you that our regulators will continue to allow 
recovery of such expenditures in the future.  Changes in the regulatory environment applicable to our business could impair our 
ability to recover costs absorbed historically by our customers, and impact adversely our results of operations, financial 
condition and cash flows. 

We are subject to comprehensive energy regulation by governmental agencies, and the recovery of our costs is dependent on 
regulatory action. 

13

We are subject to comprehensive regulation by several state and municipal utility regulatory agencies, which significantly 
influences our operating environment and our ability to recover our costs from utility customers.  The utility regulatory 
authorities in Oklahoma, Kansas and Texas regulate many aspects of our utility operations, including organization, safety, 
financing, affiliate transactions, customer service and the terms of service to customers, including the rates that we can charge 
customers.  The profitability of our operations is dependent on our ability to pass through costs related to providing natural gas 
to our customers by filing periodic rate cases.  The regulatory environment applicable to our operations could impair our ability 
to recover costs historically absorbed by our customers. 

We are unable to predict the impact that the future regulatory activities of these agencies will have on our operations.  Changes 
in regulations or the imposition of additional regulations could have an adverse impact on our business, financial condition and 
results of operations.  Further, the results of our operations could be impacted adversely if our authorized cost-recovery 
mechanisms do not function as anticipated. 

We are involved in legal or administrative proceedings before various courts and governmental bodies that could adversely 
affect our financial condition, results of operations and cash flows.

In the normal course of business, we are involved in legal or administrative proceedings before various courts and 
governmental bodies with respect to general claims, rates, environmental issues, gas cost prudence reviews and other matters.  
Adverse decisions regarding these matters, to the extent they require us to make payments in excess of amounts provided for in 
our financial statements, or to the extent they are not covered by insurance, could adversely affect our financial condition, 
results of operations and cash flows. 

Unfavorable economic and market conditions could adversely affect our earnings. 

Weakening economic activity in our markets could result in a loss of existing customers, fewer new customers, especially in 
newly constructed homes and other buildings, or a decline in energy consumption, any of which could adversely affect our 
revenues or restrict our future growth.  It may become more difficult for customers to pay their natural gas bills, leading to slow 
collections and higher-than-normal levels of accounts receivable, which in turn could increase our financing requirements and 
bad debt expense.  The foregoing could adversely affect our business, financial condition, results of operations and cash flows. 

Increases in the wholesale price of natural gas could reduce our earnings, increase our working capital requirements and 
impact adversely our customer base. 

The supply and demand balance in natural gas markets could cause an increase in the price of natural gas.  Recently, the 
increased production in the U.S. of natural gas from shale formations has put downward pressure on the wholesale cost of 
natural gas; however, restrictions or regulations on shale natural gas production, increased demand from natural gas fueled 
electric power generation or natural gas exports could cause natural gas prices to increase.  Additionally, the CFTC under the 
2010 Dodd-Frank Wall Street Reform and Consumer Protection Act has regulatory authority of the over-the-counter derivatives 
markets.  Regulations affecting derivatives could increase the price of our natural gas supply. 

An increase in the price of natural gas could cause us to experience a significant increase in short-term debt because we must 
pay suppliers for natural gas when purchased, and can be significantly in advance of when such costs may be recovered through 
the collection of customer bills, which could adversely affect our financial condition and cash flows. 

Further, the volatility of natural gas prices may impact adversely our customers’ perception of natural gas.  Natural gas costs 
are passed through to the customers of our LDCs based on the actual cost of the natural gas purchased by the particular LDC.  
Substantial fluctuations in natural gas prices can occur from year to year and sustained periods of high natural gas prices or of 
pronounced natural gas price volatility may lead to customers selecting other energy alternatives, such as electricity, and to 
increased scrutiny of the prudency of our natural gas procurement strategies and practices by our regulators.  It may also cause 
new home developers, builders and new customers to select alternative sources of energy.  Additionally, high natural gas prices 
may cause customers to conserve more and may also impact adversely our accounts receivable collections, resulting in higher 
bad debt expense.  The occurrence of any of the foregoing could adversely affect our business, financial condition, results of 
operations and cash flows, as well as our future growth opportunities. 

In addition, customer demand for natural gas may decrease due to technological advancements that increase the efficiency of 
and decrease energy consumption of appliances and equipment powered by natural gas. 

14

Our risk-management policies and procedures may not be effective, and employees may violate our risk-management 
policies. 

We have implemented a set of policies and procedures that involve both our senior management and the Audit Committee of 
our Board of Directors to assist us in managing risks associated with our business.  These risk-management policies and 
procedures are intended to align strategies, processes, people, information technology and business knowledge so that risk is 
managed throughout the organization.  However, as conditions change and become more complex, current risk measures may 
fail to assess adequately the relevant risk due to changes in the market and the presence of risks previously unknown to us.  
Additionally, if employees fail to adhere to our policies and procedures or if our policies and procedures are not effective, 
potentially because of future conditions or risks outside of our control, we may be exposed to greater risk than we had intended.  
Ineffective risk-management policies and procedures or violation of risk-management policies and procedures could have an 
adverse effect on our earnings, financial condition and cash flows. 

Our business is subject to competition that could adversely affect our results of operations. 

The natural gas distribution business is competitive, and we face competition from other companies that supply energy, 
including electric companies, propane dealers, renewable energy providers and coal companies in relation to sources of energy 
for electric power plants, as well as nuclear energy.  Significant competitive factors include efficiency, quality and reliability of 
the services we provide and price. 

The most significant product competition occurs between natural gas and electricity in the residential and small commercial 
markets.  Natural gas competes with electricity for water and space heating, cooking, clothes drying and other general energy 
needs.  Increases in the price of natural gas or decreases in the price of other energy sources could impact adversely our 
competitive position by decreasing the price benefits of natural gas to the consumer.  Customers and builders typically make 
the decision on the type of equipment at initial installation and use the chosen energy source for the life of the equipment.  
Changes in the competitive position of natural gas relative to electricity and other energy products have the potential to cause a 
decline in consumption or in the number of natural gas customers. 

Consumer or government-mandated conservation efforts, higher natural gas costs or decreases in the price of other energy 
sources also may encourage decreases in natural gas consumption and allow competition from alternative energy sources for 
applications that have traditionally used natural gas, encouraging some customers to move away from natural gas-fired 
equipment to equipment fueled by other energy sources.  Competition between natural gas and other forms of energy is also 
based on efficiency, performance, reliability, safety and other nonprice factors.  Technological improvements in other energy 
sources and events that impair the public perception of the nonprice attributes of natural gas could erode our competitive 
advantage.  These factors in turn could decrease the demand for natural gas, impair our ability to attract new customers, and 
cause existing customers to switch to other forms of energy or to bypass our systems in favor of alternative competitive 
sources.  This could result in slow or no customer growth and could cause customers to reduce or cease using our product, 
thereby reducing our ability to make capital expenditures and otherwise grow our business and affecting adversely our financial 
condition, results of operations and cash flows. 

Our business activities are concentrated in three states. 

We provide natural gas distribution services to customers in Oklahoma, Kansas and Texas.  Changes in the regional economies, 
politics, regulations and weather patterns of these states could impact adversely the growth opportunities available to us and the 
usage patterns and financial condition of our customers.  This could adversely affect our financial condition, results of 
operations and cash flows.

The availability of adequate natural gas pipeline transportation and storage capacity and natural gas supply may decrease 
and impair our ability to meet customers’ natural gas requirements and reduce our earnings. 

In order to meet customers’ natural gas demands, we must obtain sufficient natural gas supplies, pipeline transportation and 
storage capacity from third parties.  If we are unable to obtain these, our ability to meet our customers’ natural gas requirements 
could be impaired and our financial condition and results of operations may be impacted adversely.  A significant disruption to 
or reduction in natural gas supply, pipeline capacity or storage capacity due to events including, but not limited to, operational 
failures or disruptions, hurricanes, tornadoes, floods, freeze off of natural gas wells, terrorist or cyber-attacks or other acts of 
war, or legislative or regulatory actions, could reduce our normal supply of natural gas and thereby reduce our earnings. 

A downgrade in our credit ratings could adversely affect our cost of and ability to access capital. 

15

Our ability to obtain adequate and cost-effective financing depends in part on our credit ratings.  A reduction in our ratings by 
our rating agencies could adversely affect our costs of borrowing and/or access to sources of liquidity and capital.  Such a 
downgrade could further limit our access to public and private credit markets and increase the costs of borrowing under 
available credit lines.  Should our credit ratings be downgraded, it could limit our ability to obtain additional financing in the 
future for working capital, capital expenditures and acquisitions.  An increase in borrowing costs without the ability to recover 
these higher costs in the rates charged to our customers could adversely affect our results of operations and cash flows by 
limiting our ability to earn our allowed rate of return. 

We are subject to new and existing laws and regulations that may require significant expenditures or significant increases 
in operating costs or result in significant fines or penalties for noncompliance. 

Our business and operations are subject to regulation by a number of federal agencies, including FERC, DOT, OSHA, EPA, 
CFTC and various regulatory agencies in Oklahoma, Kansas and Texas, and we are subject to numerous federal and state laws 
and regulations.  Future changes to laws, regulations and policies may impair our ability to compete for business or to recover 
costs and may increase the cost of our operations.  Furthermore, because the language in some laws and regulations is not 
prescriptive, there is a risk that our interpretation of these laws and regulations may not be consistent with expectations of 
regulators.  Any compliance failure related to these laws and regulations may result in fines, penalties or injunctive measures 
affecting our operating assets.  For example, under the Energy Policy Act of 2005, the FERC has civil penalty authority under 
the Natural Gas Act of 1938, as amended, to impose penalties for current violations of up to $1 million per day for each 
violation.  In addition, as the regulatory environment for our industry increases in complexity, the risk of inadvertent 
noncompliance could also increase.  Our failure to comply with applicable regulations could result in a material adverse effect 
on our business, financial condition, results of operations and cash flows. 

We are subject to strict regulations at many of our facilities regarding employee safety, and failure to comply with these 
regulations could adversely affect our financial results. 

The workplaces associated with our facilities are subject to the requirements of DOT and OSHA, and comparable state statutes 
that regulate the protection of the health and safety of workers.  The failure to comply with DOT, OSHA and state requirements 
or general industry standards, including keeping adequate records or preventing occupational exposure to regulated substances, 
could expose us to civil or criminal liability, enforcement actions, and regulatory fines and penalties and could have a material 
adverse effect on our business, financial condition, results of operations and cash flows. 

We are subject to environmental regulations, which could adversely affect our operations or financial results. 

We are subject to laws, regulations and other legal requirements enacted or adopted by federal, state and local governmental 
authorities relating to environmental and health and safety matters, including those legal requirements that govern discharges of 
substances into the air and water, the management and disposal of hazardous substances and waste, the clean-up of 
contaminated sites, groundwater quality and availability, plant and wildlife protection, as well as work practices related to 
employee health and safety.  Environmental legislation also requires that our facilities, sites and other properties associated 
with our operations be operated, maintained, abandoned and reclaimed to the satisfaction of applicable regulatory authorities.  
The failure to comply with these laws, regulations and other requirements, or the discovery of presently unknown 
environmental conditions, could expose us to civil or criminal liability, enforcement actions and regulatory fines and penalties 
and could have a material adverse effect on our business, financial condition, results of operations and cash flows. 

We also own or retain liability for certain environmental conditions at 12 former manufactured natural gas sites in Kansas, and 
expenses related to these sites could adversely affect our business, results of operations and cash flows.  A number of 
environmental issues may exist with respect to manufactured gas plants.  With the trend toward stricter standards, greater 
regulation and more extensive permit requirements for the types of assets operated by us that are subject to environmental 
regulation, our environmental expenditures could increase in the future, and such expenditures may not be fully covered by 
insurance or recoverable in rates from our customers, which could adversely affect our financial condition, results of operations 
and cash flows.

We are subject to pipeline safety and system integrity laws and regulations that may require significant expenditures, 
significant increases in operating costs or, in the case of noncompliance, substantial fines. 

We are subject to the Pipeline Safety Improvement Act, which requires companies like us that operate high-pressure pipelines 
to perform integrity assessments on pipeline segments that pass through densely populated areas or near specifically designated 
high-consequence areas.  Further, the Pipeline Safety, Regulatory Certainty and Job Creation Act increased the maximum 
penalties for violating federal pipeline safety regulations and directed the DOT and Secretary of Transportation to conduct 

16

further review or studies on issues that may or may not be material to us.  Compliance with existing or new laws and 
regulations may result in increased capital, operating and other costs which may not be recoverable in rates from our customers 
or may impact materially our competitive position relative to other energy providers.  Failure to comply with such laws and 
regulations may result in fines, penalties or injunctive measures that would not be recoverable from customers in rates and 
could result in a material adverse effect on our financial condition, results of operations and cash flows.  The failure to comply 
with these laws, regulations and other requirements could expose us to civil or criminal liability, enforcement actions, and 
regulatory fines and penalties and could have a material adverse effect on our business, financial condition, results of 
operations and cash flows. 

Climate change, carbon neutral or energy-efficiency legislation or regulations could increase our operating costs or restrict 
our market opportunities, affecting adversely our growth, cash flows and results of operations. 

The federal and/or state governments may enact legislation or regulations that attempt to control or limit the causes of climate 
change, including greenhouse gas emissions, such as carbon dioxide.  Such laws or regulations could impose costs tied to 
carbon emissions, operational requirements or restrictions, or additional charges to fund energy efficiency activities.  They 
could also provide a cost advantage to alternative energy sources, impose costs or restrictions on end users of natural gas, or 
result in other costs or requirements, such as costs associated with the adoption of new infrastructure and technology to respond 
to new mandates.  The focus on climate change could impact adversely the reputation of fossil fuel products or services.  The 
occurrence of the foregoing events could put upward pressure on the cost of natural gas relative to other energy sources, 
increase our costs and the prices we charge to customers, reduce the demand for natural gas or cause fuel switching to other 
energy sources, and impact the competitive position of natural gas and the ability to serve new or existing customers, affecting 
adversely our business, results of operations and cash flows. 

We are subject to physical and financial risks associated with climate change. 

There is a growing belief that emissions of greenhouse gases may be linked to global climate change.  Climate change creates 
physical and financial risk.  Our customers’ energy needs vary with weather conditions, primarily temperature and humidity.  
For residential customers, heating and cooling represent their largest energy use.  To the extent weather conditions may be 
affected by climate change, customers’ energy use could increase or decrease depending on the duration and magnitude of any 
changes.  A decrease in energy use due to weather changes may affect our financial condition through decreased revenues and 
cash flows.  Extreme weather conditions in general require more system backup, adding to costs, and can contribute to 
increased system stresses, including service interruptions.  Weather conditions outside of our operating territory could also have 
an impact on our revenues and cash flows by affecting natural gas prices.  Severe weather impacts our operating territories 
primarily through thunderstorms, tornados and snow or ice storms.  To the extent the frequency of extreme weather events 
increases, this could increase our cost of providing service.  We may not be able to pass on the higher costs to our customers or 
recover all the costs related to mitigating these physical risks.  To the extent financial markets view climate change and 
emissions of greenhouse gases as a financial risk, this could adversely affect our ability to access capital markets or cause us to 
receive less favorable terms and conditions in future financings.  Our business could be affected by the potential for lawsuits 
related to or against greenhouse gas emitters based on the claimed connection between greenhouse gas emissions and climate 
change, which could impact adversely our business, results of operations and cash flows. 

Demand for natural gas is highly weather sensitive and seasonal, and weather conditions may cause our earnings to vary 
from year to year. 

Our earnings can vary from year to year, depending in part on weather conditions, which directly influence the volume of 
natural gas delivered to customers.  Natural gas sales to residential and commercial customers are seasonal, as a substantial 
portion of their natural gas requirements are for heating during the winter months.  Warmer-than-normal weather can reduce 
our utility margins as customer consumption declines.  We have implemented weather normalization mechanisms for our sales 
to customers in Oklahoma, Kansas and portions of Texas, which are designed to limit our earnings sensitivity to weather.  
Weather normalization mechanisms allow us to increase customer billings to offset lower natural gas usage when weather is 
warmer than normal and decrease customer billings to offset higher natural gas usage when weather is colder than normal.  If 
our rates and tariffs are modified to curtail such weather protection programs, then we would be exposed to additional risk 
associated with weather.  As a result of occurrences of the foregoing, our results of operations and cash flows could vary and be 
impacted adversely. 

We may not be able to complete necessary or desirable expansion or infrastructure development projects, which may delay 
or prevent us from serving our customers or expanding our business. 

17

In order to serve new customers or expand our service to existing customers, we may need to maintain, expand or upgrade our 
distribution and/or transmission infrastructure, including laying new distribution lines.  Various factors may prevent or delay us 
from completing such projects or make completion more costly, such as the inability to obtain required approval from local, 
state and/or federal regulatory and governmental bodies, public opposition to the project, inability to obtain adequate financing, 
competition for labor and materials, construction delays, cost overruns, and inability to negotiate acceptable agreements 
relating to construction or other material components of an infrastructure development project.  As a result, we may not be able 
to serve adequately existing customers or support customer growth, which would impact adversely our business, stakeholder 
perception, financial condition, results of operations and cash flows. 

We may pursue acquisitions, divestitures and other strategic opportunities, the success of which may impact adversely our 
results of operations, cash flows and financial condition. 

As part of our strategic objectives, we may pursue acquisitions to complement or expand our business, as well as divestures and 
other strategic opportunities.  We may not be able to successfully negotiate, finance or receive regulatory approval for future 
acquisitions or integrate the acquired businesses with our existing business and services.  These efforts may also distract our 
management and employees from day-to-day operations and require substantial commitments of time and resources.  Future 
acquisitions could result in potentially dilutive issuances of equity securities, a decrease in our liquidity as a result of our using 
a significant portion of our available cash or borrowing capacity to finance the acquisition, the incurrence of debt, contingent 
liabilities and amortization expenses and substantial goodwill.  The effects of these strategic decisions may have long-term 
implications that are not likely to be known to us in the short-term.  Changing political climates and public attitudes may 
adversely affect the ongoing acceptability of strategic decisions that have been made (and, in some cases, previously approved 
by regulators) to the detriment of the company.  We may be affected materially and adversely if we are unable to integrate 
successfully businesses that we acquire. 

An impairment of goodwill and long-lived assets could reduce our earnings. 

At December 31, 2015, we had approximately $158 million of goodwill recorded on our balance sheet.  Goodwill is recorded 
when the purchase price of a business exceeds the fair market value of the tangible and separately measurable intangible net 
assets.  GAAP requires us to test goodwill for impairment on an annual basis or when events or circumstances occur indicating 
that goodwill might be impaired.  Long-lived assets with finite useful lives are reviewed for impairment whenever events or 
changes in circumstances indicate that the carrying amount may not be recoverable.  If we determine that impairment is 
indicated, we would be required to take an immediate noncash charge to earnings with a correlative effect on our equity and 
balance sheet leverage as measured by debt to total capitalization, which could impact adversely our financial condition and 
results of operations. 

We may be unable to access capital or our cost of capital may increase significantly. 

Our ability to obtain adequate and cost-effective financing is dependent upon the liquidity of the financial markets, in addition 
to our financial condition and credit ratings.  Disruptions in the capital and credit markets could adversely affect our ability to 
access short-term and long-term capital.  Access to funds under our ONE Gas Credit Agreement will be dependent on the 
ability of the participating banks to meet their funding commitments.  Those banks may not be able to meet their funding 
commitments if they experience shortages of capital and liquidity.  Disruptions and volatility in the global credit markets could 
cause the interest rate we pay on our ONE Gas Credit Agreement, which is based on LIBOR, to increase.  This could result in 
higher interest rates on future financings, and could impact the liquidity of the lenders under our ONE Gas Credit Agreement, 
potentially impairing their ability to meet their funding commitments to us.  Disruptions in the capital and credit markets as a 
result of uncertainty, changing or increased regulation or failures of significant financial institutions could adversely affect our 
access to capital needed for our business.  The inability to access adequate capital or an increase in the cost of capital may 
require us to conserve cash, prevent or delay us from making capital expenditures, and require us to reduce or eliminate our 
dividend or other discretionary uses of cash.  A significant reduction in our liquidity could cause a negative change in our 
ratings outlook or even a reduction in our credit ratings.  This could in turn further limit our access to credit markets and 
increase our costs of borrowing. 

Changes in federal and state fiscal, tax and monetary policy could increase significantly our costs or decrease our cash 
flows. 

Changes in federal and state fiscal, tax and monetary policy may result in increased taxes, interest rates, and inflationary 
pressures on the costs of goods, services and labor.  This could increase our expenses and capital spending and decrease our 
cash flows if we are not able to recover or recover timely such increased costs from our customers.  This series of events may 
increase our rates to customers and thus may impact adversely customer billings and customer growth.  Changes in tax rules 

18

could adversely affect our cash flows.  Any of these events may cause us to increase debt, conserve cash, adversely affect our 
ability to make capital expenditures to grow the business or other discretionary uses of cash, and could adversely affect our 
cash flows. 

Federal, state and local jurisdictions may challenge our tax return positions. 

The preparation of our federal and state tax return filings may require significant judgments, use of estimates and the 
interpretation and application of complex tax laws.  Significant judgment also is required in assessing the timing and amounts 
of deductible and taxable items.  Despite management’s expectation that our tax return positions will be fully supportable, 
certain positions may be challenged successfully by federal, state and local jurisdictions. 

As a result of cross-default provisions in our borrowing arrangements, we may be unable to satisfy all of our outstanding 
obligations in the event of a default on our part. 

The terms of our debt agreements contain cross-default provisions, which provide that we will be in default under such 
agreements in the event of certain defaults under other debt agreements.  Accordingly, should an event of default occur under 
any of those agreements, we would face the prospect of being in default under all of our debt agreements, obliged in such 
instance to satisfy all of our outstanding indebtedness simultaneously.  In such an event, we may not be able to obtain 
alternative financing or, if we are able to obtain such financing, we may not be able to obtain it on terms acceptable to us, 
which would adversely affect our ability to implement our business plan, have flexibility in planning for, or reacting to, 
changes in our business, make capital expenditures and finance our operations. 

The cost of providing pension and other postemployment health care benefits to eligible employees and qualified retirees is 
subject to changes in pension fund values and changing demographics and may increase.  In addition, the passage of the 
Patient Protection and Affordable Care Act in 2010 could increase the cost of health care benefits for our employees.  
Further, the costs to us of providing such benefits and related funding requirements are subject to the continued and timely 
recovery of such costs through our rates. 

We have defined benefit pension plans and other postemployment welfare plans for certain employees.  Our defined benefit and 
other postemployment welfare plans are closed to new participants.  Our other postemployment welfare plans only subsidize 
costs for providing postemployment medical benefits.  The cost of providing these benefits to eligible current and former 
employees is subject to changes in the market value of our pension and other postemployment benefit plan assets, changing 
demographics, including longer life expectancy of plan participants and their beneficiaries, and changes in health care costs. 

Any sustained declines in equity markets and reductions in bond values may have a material adverse effect on the value of our 
pension and other postemployment benefit plan assets.  In these circumstances, additional cash contributions to our pension and 
other postemployment benefit plans may be required, which could have a material adverse impact on our financial condition 
and cash flows. 

In addition, the costs of providing health care benefits to our employees could increase over the next five to ten years due in 
large part to the Patient Protection and Affordable Care Act of 2010.  The future costs of compliance with its provisions are 
difficult to measure at this time.  Also, our costs of providing such benefits and related funding requirements could also 
increase materially in the future, depending on the timing of the recovery, if any, of such costs through our rates, which could 
impact adversely our financial condition and cash flows. 

Our business is subject to operational hazards and unforeseen interruptions that could affect materially and adversely our 
business and for which we may not be insured adequately. 

We are subject to all of the risks and hazards typically associated with the natural gas distribution business.  Operating risks 
include, but are not limited to, leaks, pipeline ruptures and the breakdown or failure of equipment or processes.  Other 
operational hazards and unforeseen interruptions include adverse weather conditions, accidents, explosions, fires, the collision 
of equipment with our pipeline facilities (for example, this may occur if a third-party were to perform excavation or 
construction work near our facilities) and catastrophic events, such as tornados, hurricanes, earthquakes, floods or other similar 
events beyond our control.  It is also possible that our facilities could be direct targets or indirect casualties of an act of 
terrorism, including cyber attacks.  A casualty occurrence might result in injury or loss of life, extensive property damage or 
environmental damage caused to or by employees, customers, contractors, vendors and other third parties.  The location of 
pipeline facilities near populated areas, including residential areas, commercial business centers and industrial gathering places, 
could increase the level of damages resulting from these risks.  Liabilities incurred and interruptions to the operations of our 
pipelines or other facilities caused by such an event could reduce revenues generated by us and increase expenses, which could 
19

have a material adverse effect on our financial condition, results of operations and cash flows.  Additionally, our regulators may 
not allow us to recover part or all of the increased cost related to the foregoing events from our customers, which would 
adversely affect our earnings and cash flows. 

Unanticipated events or a combination of events, failure in resources needed to respond to events, or slow or inadequate 
response to events may have an adverse impact on our financial condition, results of operations and cash flows.   

While we have general liability and property insurance currently in place in amounts that we consider appropriate based on our 
assessment of business risk and best practices in our industry and in general business, such policies are subject to certain limits 
and deductibles.  Further, we are not fully insured against all risks inherent in our business.  As a result of market conditions, 
premiums and deductibles for certain insurance policies can increase substantially, and, in some instances, certain insurance 
may become unavailable or available only for reduced amounts of coverage.  Consequently, we may not be able to renew 
existing insurance policies or purchase other desirable insurance on commercially reasonable terms, if at all. 

The insurance proceeds received for any loss of, or any damage to, any of our facilities or to third parties may not be sufficient 
to restore the total loss or damage.  Further, the proceeds of any such insurance may not be paid in a timely manner.  The 
occurrence of any of the foregoing could have a material adverse effect on our financial condition, results of operations and 
cash flows. 

A failure in our operational systems or cyber security attacks on any of our facilities, or those of third parties, may adversely 
affect our financial results. 

Our business is dependent upon our operational systems to process a large amount of data and complex transactions.  If any of 
our financial, operational or other data processing systems fail or have other significant shortcomings, our financial results 
could be affected adversely.  Our financial results could also be affected adversely if an employee causes our operational 
systems to fail, either as a result of inadvertent error or by deliberately tampering with or manipulating our operational systems.  
In addition, dependence upon automated systems may further increase the risk that operational system flaws, employee 
tampering or manipulation of those systems will result in losses that are difficult to detect. 

Due to increased technology advances, we have become more reliant on technology to help increase efficiency in our business.  
We use computer programs to help run our financial and operations organizations, including an enterprise resource planning 
system that integrates data and reporting activities across our company.  The use of technological programs, systems and tools 
may subject our business to increased risks.  Any future cyber security attacks that affect our distribution facilities, our 
customers, our suppliers and third party service providers or any financial data could have a material adverse effect on our 
businesses.  In addition, cyber attacks on our company, customer and employee data may result in a financial loss and may 
impact adversely our reputation.  Third-party systems on which we rely could also suffer operational system failure. 

The foregoing events could adversely affect our business reputation, diminish customer confidence, disrupt operations, subject 
us to financial liability or increased regulation, increase our costs and expose us to material legal claims and liability, and our 
business, financial condition and results of operations could be affected adversely. 

Our business could be affected adversely by strikes or work stoppages by our unionized employees. 

At February 1, 2016, approximately 700 of our estimated 3,400 employees were represented by collective-bargaining units 
under collective-bargaining agreements.  We are involved periodically in discussions with collective-bargaining units 
representing some of our employees to negotiate or renegotiate labor agreements.  We cannot predict the results of these 
negotiations, including whether any failure to reach new agreements will have a negative effect on our business, financial 
condition and results of operations or whether we will be able to reach any agreement with the collective-bargaining units.  Any 
failure to reach agreement on new labor contracts might result in a work stoppage.  Any future work stoppage could, depending 
on the operations and the length of the work stoppage, have a material adverse effect on our financial condition and results of 
operations. 

A shortage of skilled labor may make it difficult for us to maintain labor productivity and competitive costs, which could 
adversely affect operations and cash flows.  Further, we may be unable to attract and retain professional and technical 
employees, which could impact adversely our earnings. 

Our operations require skilled and experienced workers with proficiency in multiple tasks.  In recent years, a shortage of 
workers trained in various skills associated with the natural gas distribution business has caused us to conduct certain 
operations without full staff, thus hiring outside resources, which may decrease productivity and increase costs.  This shortage 
20

of trained workers is the result of experienced workers reaching retirement age and increased competition for workers in certain 
areas, combined with the difficulty of attracting new workers to the natural gas distribution industry.  This shortage of skilled 
labor could continue over an extended period.  If the shortage of experienced labor continues or worsens, it could have an 
adverse impact on labor productivity and costs and our ability to meet the needs of our customers in the event there is an 
increase in the demand for our products and services, which could adversely affect our business and cash flows. 

Our ability to implement our business strategy and serve our customers is dependent upon our ability to employ talented 
professionals and attract and retain a skilled, high-performing workforce.  We are subject to the risk that we will not be able to 
effectively replace or transfer the knowledge and expertise of retiring employees.  Without a skilled workforce, our ability to 
provide quality service to our customers and meet our regulatory requirements will be challenged, and this could impact 
adversely our business, financial condition, results of operations and cash flows. 

Changes in accounting standards may impact adversely our financial condition and results of operations. 

The SEC is considering whether issuers in the United States should be required to prepare financial statements in accordance 
with IFRS instead of the current GAAP.  IFRS is a comprehensive set of accounting standards promulgated by the International 
Accounting Standards Board, which are currently in effect for most other countries in the world.  Unlike GAAP, IFRS does not 
provide currently an industry accounting standard for rate-regulated activities.  As such, if IFRS were adopted in its current 
state, we may be precluded from applying certain regulatory accounting principles, including the recognition of certain 
regulatory assets and regulatory liabilities.  The potential issues associated with rate-regulated accounting, along with other 
potential changes associated with the adoption of IFRS, may impact adversely our reported financial condition and results of 
operations should adoption of IFRS be required. 

Additionally, we are subject to additional changes in GAAP, SEC regulations and other interpretations of financial reporting 
requirements for public utilities.  We neither have control over the impact these changes may have on our financial condition or 
results of operations nor the timing of such changes.

Our financing arrangements subject us to various restrictions that could limit our operating flexibility. 

The covenants in the indenture governing our Senior Notes and our ONE Gas Credit Agreement restrict our ability to create or 
permit certain liens, to consolidate or merge or to convey, transfer or lease substantially all of our properties and assets. 

The ONE Gas Credit Agreement includes a requirement that our debt to total capital ratio may not exceed 70 percent as of the 
end of any calendar quarter.  Events beyond our control could impair our ability to satisfy this requirement.  As long as our 
indebtedness remains outstanding, these restrictive covenants could impair our ability to expand or pursue our growth strategy.  
In addition, the breach of any covenants or any payment obligations in any of these debt agreements will result in an event of 
default under the applicable debt instrument.  If there were an event of default under one of our debt agreements, the holders of 
the defaulted debt may have the ability to cause all amounts outstanding with respect to that debt to be due and payable, subject 
to applicable grace periods.  This could trigger cross-defaults under our other debt agreements, including our Senior Notes.  
Forced repayment of some or all of our indebtedness would reduce our available cash and have an adverse impact on our 
financial condition and results of operations.  

Some of our debt, including borrowings under our ONE Gas Credit Agreement and our commercial paper program, is 
based on variable rates of interest, which could result in higher interest expenses in the event of an increase in interest 
rates. 

In the future, we could be exposed to fluctuations in variable interest rates.  This increases our exposure to fluctuations in 
market interest rates.  Amounts borrowed under the ONE Gas Credit Agreement and commercial paper program are based on 
variable rates of interest.  If these rates rise, the interest rate on this debt will also increase.  Therefore, an increase in these rates 
may increase our interest payment obligations and have a negative effect on our cash flows and financial position.

RISKS RELATING TO THE SEPARATION

We are responsible for certain contingent and other liabilities related to the historical natural gas distribution business of 
ONEOK, as well as a portion of any contingent corporate liabilities of ONEOK that do not relate to either the natural gas 
distribution business or ONEOK’s remaining businesses. 

Under the Separation and Distribution Agreement between us and ONEOK, we assumed and are responsible for certain 
contingent and other corporate liabilities related to the historical natural gas distribution business of ONEOK (including 

21

associated costs and expenses, whether arising prior to, at, or after our separation).  In addition, under the Separation and 
Distribution Agreement we are also responsible for a portion of any contingent corporate liabilities of ONEOK that do not 
relate to either our business or the business of ONEOK following the separation (for example, liabilities associated with certain 
corporate activities not specifically attributable to either business).  If we are required to indemnify ONEOK or are otherwise 
liable for these liabilities, they may have a material adverse effect on our financial condition, results of operations and cash 
flows.  

Third parties may seek to hold us responsible for liabilities of ONEOK that we did not assume in our agreements.

Third parties may seek to hold us responsible for retained liabilities of ONEOK.  Under our agreements with ONEOK, 
ONEOK has agreed to indemnify us for claims and losses relating to these retained liabilities.  However, if those liabilities are 
significant and we are ultimately held liable for them, we cannot assure that we will be able to recover the full amount of our 
losses from ONEOK. 

Our prior and continuing relationship with ONEOK exposes us to risks attributable to businesses of ONEOK.

ONEOK is obligated to indemnify us for losses that a party may seek to impose upon us or our affiliates for liabilities relating 
to the business of ONEOK.  Any claims made against us that are properly attributable to ONEOK in accordance with these 
arrangements require us to exercise our rights under our agreements with ONEOK to obtain payment from ONEOK.  We are 
exposed to the risk that, in these circumstances, ONEOK cannot, or will not, make the required payment. 

If the distribution, together with certain related transactions, were to fail to qualify as a tax-free transaction for U.S. federal 
income tax purposes under Sections 355, 368(a)(1)(D) and other related provisions of the Code, then ONEOK and/or its 
shareholders could incur significant U.S. federal income tax liabilities, and we could incur significant indemnity 
obligations. 

ONEOK received an IRS Ruling to the effect that the distribution, together with certain related transactions, qualified as tax-
free to ONEOK, us and the ONEOK shareholders under Sections 355, 368(a)(1)(D) and other related provisions of the Code.  
ONEOK also received an opinion of Skadden, Arps, Slate, Meagher & Flom LLP, tax counsel to ONEOK, which opinion relies 
on the continued validity of the IRS Ruling, with respect to certain issues relating to the tax-free nature of the transactions that 
were not addressed in or covered by the IRS Ruling. 

The IRS Ruling and the tax opinion rely upon certain assumptions, as well as statements, representations and certain 
undertakings made by our officers and the officers of ONEOK regarding the past and future conduct of the companies’ 
respective businesses and other matters.  If any of those statements, representations or assumptions are incorrect or untrue in 
any material respect or any of those undertakings are not complied with, the conclusions reached in the IRS Ruling or the 
opinion could be affected adversely, and ONEOK and/or its shareholders could be subject to significant tax liabilities.  
Notwithstanding the IRS Ruling and opinion of tax counsel, the IRS could determine on audit that the distribution, together 
with certain related transactions, was taxable if it determines that any of these statements, representations, assumptions, or 
undertakings were not correct or have been violated or if it disagrees with the conclusions in the opinion that were not covered 
by the IRS Ruling, or for other reasons, including as a result of certain significant changes in the stock ownership of ONEOK 
or us after the distribution.

If the distribution were subsequently determined, for whatever reason, not to qualify as a transaction that is tax-free for U.S. 
federal income tax purposes under Sections 355, 368(a)(1)(D), and other related provisions of the Code, ONEOK and/or the 
holders of ONEOK common stock immediately prior to the distribution could incur significant tax liabilities, and, in certain 
circumstances as described further under "Certain Relationships and Related Transactions, and Director Independence - Tax 
Matters Agreement," we will be required to indemnify ONEOK, its subsidiaries, and certain related persons for taxes and 
related expenses resulting from the distribution, which could be material.  Any such indemnity obligation could have a 
materially adverse impact on our financial condition. 

To preserve the tax-free treatment to ONEOK and/or its shareholders of the distribution and certain related transactions, we 
may not be able to engage in certain transactions. 

To preserve the tax-free treatment to ONEOK and/or its shareholders of the distribution and certain related transactions, we are 
restricted, under the Tax Matters Agreement between us and ONEOK, from taking any action that prevents such transactions 
from being tax-free for U.S. federal, state and local income tax purposes.  These restrictions may limit our ability to pursue 
certain strategic transactions or engage in other transactions, including using our common stock to make acquisitions and in 
connection with equity capital market transactions that might increase the value of our business. 

22

 
RISKS RELATING TO OUR COMMON STOCK

Provisions in our certificate of incorporation, our bylaws, Oklahoma law and certain of the agreements into which we have 
entered as part of the separation may prevent or delay an acquisition of our company, which could decrease the trading 
price of our common stock. 

Our certificate of incorporation, bylaws and Oklahoma law contain provisions that are intended to deter coercive takeover 
practices and inadequate takeover bids by making such practices or bids unacceptably expensive to the raider and to encourage 
prospective acquirers to negotiate with our board of directors rather than to attempt a hostile takeover.  These provisions 
include, among others: 

• 
• 

• 
• 

a board of directors that is divided into three classes with staggered terms;
rules regarding how shareholders may present proposals or nominate directors for election at shareholder 
meetings;
the right of our board of directors to issue preferred stock without shareholder approval; and
limitations on the right of shareholders to remove directors.

Oklahoma law also imposes some restrictions on mergers and other business combinations between us and any holder of 15 
percent or more of our outstanding common stock. 

We believe these provisions protect our shareholders from coercive or otherwise potentially unfair takeover tactics by requiring 
potential acquirers to negotiate with our board of directors and by providing our board of directors with more time to assess any 
acquisition proposal.  These provisions are not intended to make our company immune from takeovers.  However, these 
provisions apply even if the offer may be considered beneficial by some shareholders and could delay or prevent an acquisition 
that our board of directors determines is not in the best interests of our company and our shareholders. 

Our ability to pay dividends on our common stock will depend on our ability to generate sufficient positive earnings and 
cash flows. 

Our ability to pay dividends in the future will depend upon, among other things, our future earnings, cash flows and restrictive 
covenants, if any, under future credit agreements to which we may be a party.  Our cash available for dividends will principally 
be generated from our operations.  Because the cash we generate from operations will fluctuate from quarter to quarter, we may 
not be able to maintain future dividends at the levels we expect or at all.  Our ability to pay dividends depends primarily on 
cash flows, including cash flows from changes in working capital, and not solely on profitability, which is affected by noncash 
items.  As a result, we may pay dividends during periods when we record net losses and may be unable to pay cash dividends 
during periods when we record net income. 

ITEM 1B. 

UNRESOLVED STAFF COMMENTS

None.

ITEM 2. 

PROPERTIES

The following table sets forth the approximate number of service lines, pipeline and other natural gas distribution properties as 
of December 31, 2015:

Properties (miles)

Distribution

Transmission

Total properties

OK

KS

TX

Total

18,300

700

19,000

12,000

1,500

13,500

10,100

800

10,900

40,400

3,000

43,400

We lease approximately 0.5 million square feet of office space and other facilities for our operations.  In addition, we have 50.4 
Bcf of natural gas storage capacity under lease, with maximum allowable daily withdrawal capacity of approximately 1.3 Bcf/
d.

23

ITEM 3. 

LEGAL PROCEEDINGS

See Note 14 of the Notes to Financial Statements in this Annual Report for information regarding legal proceedings.

ITEM 4. 

MINE SAFETY DISCLOSURES

Not applicable.

24

PART II

ITEM 5. 

MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS 
AND ISSUER PURCHASES OF EQUITY SECURITIES

MARKET INFORMATION, HOLDERS AND DIVIDENDS

Our common stock is listed on the NYSE under the trading symbol “OGS.”   The following table sets forth the high and low 
closing prices of our common stock for the period indicated:

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

First Quarter

Second Quarter

Third Quarter

$

$

$

$

$

$

$

Year Ended

December 31, 2015

High

Low

Dividends

46.11 $

44.33 $

45.56 $

51.34 $

39.38 $

41.41 $

41.70 $

45.18 $

Year Ended

December 31, 2014*

High

Low

Dividends

35.80 $

37.98 $

37.77 $

31.53 $

34.25 $

34.00 $

34.03 $

0.30

0.30

0.30

0.30

—

0.28

0.28

0.28

Fourth Quarter
*Our common stock began regular-way trading on February 3, 2014.

$

44.19 $

At February 5, 2016, there were 14,944 registered shareholders of the Company’s common stock.

In January 2016, we declared a dividend of $0.35 per share ($1.40 per share on an annualized basis), payable on March 11, 
2016, to shareholders of record as of February 26, 2016.

Employee Stock Award Program

Under the Employee Stock Award Program, we have issued, for no monetary consideration, one share of our common stock to 
all eligible employees when the per-share closing price of our common stock on the NYSE closes for the first time at or above 
each $1.00 increment above $34.  Shares issued to employees under this program during 2015 totaled 23,506, and 
compensation expense related to the Employee Stock Award Program was $1.1 million.

The total number of shares of our common stock authorized for issuance under this program is 125,000.  The shares issued 
under this program have not been registered under the Securities Act, in reliance upon the position taken by the SEC (see 
Release No. 6188, dated February 1, 1980) that the issuance of shares to employees pursuant to a program of this kind does not 
require registration under the Securities Act.  See Note 11 of the Notes to Financial Statements in this Annual Report for 
additional information.

25

Performance Graph

The following performance graph compares the performance of our common stock with the S&P MidCap 400 Index, the Dow 
Jones Industrial Average and a ONE Gas Peer Group during the period beginning February 3, 2014, and ending on December 
31, 2015.  February 3, 2014 was the first day of “regular way” trading for ONE Gas on the NYSE.  This graph assumes a $100 
investment in our common stock and in each of the indices at the beginning of the period and a reinvestment of dividends paid 
on such investments throughout the period.

Value of $100 Investment Assuming Reinvestment of Dividends at February 3, 2014, and 
at the End of Every Quarter Through December 31, 2015, among ONE Gas, Inc., the S&P 
MidCap 400 Utilities Index, the S&P MidCap 400 Index, the Dow Jones Industrial Average 
and the ONE Gas Peer Group

$160

$140

$120

$100

$80

ONE Gas, Inc.
S&P MidCap 400 Index
ONE Gas Peer Group 1

S&P MidCap 400 Utilities Index
Dow Jones Industrial Average

Cumulative Total Return

As of Each Quarter Ending

3/31/2014

6/30/2014

9/30/2014 12/31/2014 3/31/2015

6/30/2015

9/30/2015 12/31/2015

ONE Gas, Inc.

S&P MidCap 400 Utilities Index

S&P MidCap 400 Index

$

$

$

106.84 $

113.12 $

103.41 $

125.39 $

132.43 $

131.32 $

140.81 $

156.83

107.49 $

115.89 $

105.54 $

118.29 $

112.20 $

104.63 $

107.00 $

111.26

109.21 $

113.93 $

109.38 $

116.32 $

122.50 $

121.19 $

110.89 $

113.78

$

107.54 $

Dow Jones Industrial Average
ONE Gas Peer Group1
1 The ONE Gas peer group used in this graph is the same peer group that will be used in determining our level of performance under our 2015 performance 
units at the end of the three-year performance period and is comprised of the following companies: AGL Resources Inc.; Atmos Energy Corporation; Avista 
Corporation; The Laclede Group, Inc.; New Jersey Resources Corporation; Northwest Natural Gas Company; Piedmont Natural Gas Company, Inc.; Questar 
Corporation; South Jersey Industries, Inc.; Southwest Gas Corp.; Vectren Corporation and WGL Holdings, Inc.

112.66 $

110.59 $

123.53 $

110.28 $

118.56 $

126.30 $

114.69 $

118.52 $

107.04 $

118.91 $

116.31 $

127.05 $

107.44 $

118.77

137.63

$

26

ITEM 6. 

SELECTED FINANCIAL DATA

The following table sets forth our selected financial data for each of the periods indicated:

2015

Years Ended December 31,
2013
(Millions of dollars except per share data)

2012

2014

Revenues
Net margin
Operating income
Net income
Total assets
Long-term line of credit with ONEOK
Long-term debt, including current maturities
Basic earnings per share
Diluted earnings per share
Dividends declared per common share

$
$
$
$
$
$
$
$
$
$

1,547.7
841.7
239.1
119.0
4,644.4

1,201.3
2.26
2.24
1.20

$
$
$
$
$
— $
$
$
$
$

1,818.9
827.0
225.3
109.8
4,649.2

$
$
$
$
$
— $
$
$
$

1,201.3
2.10
2.07
0.84

$
$
$
$
$
$
$
$
$

1,690.0
813.0
220.3
99.2
3,846.5
1,027.6
1.3
1.90
1.90
—

$
$
$
$
$
$
$
$
$

1,376.6
756.4
215.7
96.5
3,491.3
1,027.6
1.5
1.84
1.84
—

2011

1,621.3
751.8
199.7
86.8
3,285.5
912.4
1.9
1.66
1.66
—

Prior to 2014, historical basic and diluted earnings per share for the periods presented were calculated based on the number of 
shares distributed to ONEOK shareholders on separation plus any shares associated with fully vested stock awards that had not 
been issued and considered outstanding as of the beginning of each period prior to the separation.  See Note 1 of the Notes to 
Financial Statements in this Annual Report for additional information on earnings per share.

ITEM 7. 

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS 
OF OPERATIONS

The following discussion and analysis should be read in conjunction with our audited financial statements and Notes to 
Financial Statements in this Annual Report.

EXECUTIVE SUMMARY

We are a 100 percent regulated natural gas distribution company.  As such, our regulators determine the rates we are allowed to 
charge for our service based on our revenue requirements needed to achieve our authorized rates of return.  We earn revenues 
from the delivery of natural gas, but do not earn a profit on the natural gas that we deliver, as those costs are passed through to 
our customers at cost.  The primary components of our revenue requirements are the amount of capital invested in our business, 
which is also known as rate base, our allowed rate of return on our capital investments and our recoverable operating expenses, 
including depreciation and income taxes.  Our rates have both a fixed and a variable component, with approximately 73 percent 
and 71 percent of our natural gas sales net margin in 2015 and 2014, respectively, derived from fixed monthly charges to our 
customers.  The variable component of our rates is dependent on the consumption of natural gas, which is impacted primarily 
by the weather and, to a lesser extent, economic activity.  While we have weather normalization mechanisms in most 
jurisdictions that adjust customers’ bills when the actual heating degree days differ from normalized heating degree days, these 
mechanisms are in place for only a portion of the year and do not offset all fluctuations in usage resulting from weather 
variability.  Accordingly, the weather can have either a positive or negative impact on our financial performance.  

Our financial performance, therefore, is contingent on a number of factors, including: (1) regulatory outcomes, which 
determine the returns we are authorized to earn and the rates we are allowed to charge for our service; (2) the consumption of 
natural gas, which impacts the amount of our net margin derived from the variable component of our rates; (3) our operating 
performance, which impacts our operating expenses; and (4) the perceived value of natural gas relative to other energy sources, 
particularly electricity, which influences our customers’ choice of natural gas to provide a portion of their energy needs. 

We are subject to regulatory requirements for pipeline integrity and environmental compliance.  These requirements impact our 
operating expenses and the level of capital expenditures required for compliance.  Historically, our regulators have allowed 
recovery of these expenditures.  However, because integrity and environmental regulation is changing constantly, our capital 
and operating expenditures to comply will change, as well.  Although we believe our regulators will continue to allow recovery 
of such expenditures in the future, we will continue to make these expenditures with no assurance about if, or over what period, 
we will be permitted to recover them.

27

 
 
 
 
RECENT DEVELOPMENTS

In January 2016, a dividend of $0.35 per share ($1.40 per share on an annualized basis) was declared for shareholders of record 
on February 26, 2016, payable March 11, 2016.

REGULATORY ACTIVITIES

Oklahoma - In July 2015, Oklahoma Natural Gas filed a request with the OCC for an increase in base rates, reflecting system 
investments and operating costs necessary to maintain the safety and reliability of its natural gas distribution system.  In 
January 2016, the OCC approved a joint stipulation and settlement agreement reached in November 2015 to allow an increase 
in revenue of $29,995,000.  We also recorded a regulatory asset of $2.4 million to recover certain information technology costs 
incurred as a result of our separation from ONEOK in 2014, which will be recovered over four years. The agreement set 
Oklahoma Natural Gas’ authorized return on equity at 9.5 percent, which represents the midpoint of the allowed range of 9.0 to 
10.0 percent and a rate base of approximately $1.2 billion.  The agreement includes the continuation, with certain 
modifications, of the Performance Based Rate Change tariff that was established in 2009. 

In March 2015, Oklahoma Natural Gas filed its energy-efficiency program true-up application for its 2014 program year, 
requesting a utility incentive of $1.2 million.  In July 2015, the Public Utility Division of the OCC and all other parties entered 
into a joint stipulation approving the filing.  A hearing on merits was held in July 2015, with the Administrative Law Judge 
recommending the approval of the joint stipulation.  The joint stipulation was approved by the OCC in December 2015.

Oklahoma Natural Gas filed a PBRC application in March 2014.  In June 2014, a joint stipulation and settlement agreement 
associated with our PBRC filing was reached and contained an increase in base rates of approximately $13.7 million, and an 
energy-efficiency program true-up and a utility incentive adjustment of $0.9 million.  In August 2014, the settlement was 
approved by the OCC.

Kansas - Kansas Gas Service is expected to file a rate case in 2016 based on a 2015 test year, with new rates effective January 
2017.

In August 2015, Kansas Gas Service submitted an application to the KCC requesting an increase of approximately $2.4 million 
related to its GSRS.  GSRS is a capital-recovery mechanism that allows for rate adjustment, providing recovery of and a return 
on incremental safety-related and government-mandated capital investments made between rate cases.  In November 2015, the 
KCC approved the $2.4 million increase effective December 2015.   

In August 2014, Kansas Gas Service submitted an application to the KCC requesting an increase in rates of approximately $3.5 
million related to its GSRS.  In November 2014, the KCC approved an increase of $3.5 million, which became effective on 
December 2014.  

In December 2013, the KCC approved a settlement agreement between ONEOK, the staff of the KCC, and the Citizens’ Utility 
Ratepayer Board for the separation from ONEOK of our Kansas Gas Service natural gas distribution business.  Among other 
things, the terms of the settlement agreement include the following: 

•  Kansas Gas Service shall not change its base rates prior to January 1, 2017.  The time limitation on filing a general 
rate case to change base rates does not preclude Kansas Gas Service from changing rates or tariffs to recover 
appropriate costs under its current approved riders and tariffs, including its COGR, ACA, WNA, ATSR and GSRS 
tariffs; 

•  Kansas Gas Service agreed to expense certain costs associated with ONEOK’s acquisition of Kansas Gas Service in 
1997 that were previously recorded as a regulatory asset and were being amortized and recovered in rates over a 40-
year period.  As such, we recorded a noncash charge to income of approximately $10.2 million in the fourth quarter of 
2013; 

•  The level of pension and other postemployment benefit costs used to calculate Kansas Gas Service’s Pension and 
Other Postemployment Benefit Trackers was adjusted to $13.6 million from $16.6 million, with a corresponding 
reduction to revenues; and 

•  A one-time contribution to 501(c)(3) organizations of $1.2 million to provide financial assistance for weatherization of 
housing for low income natural gas customers of Kansas Gas Service that was accrued in the fourth quarter of 2013. 

The agreement authorized the transfer of ONEOK’s existing Kansas natural gas distribution assets, certificates of convenience 
and necessity, franchises and tariffs to us. 

28

 
Texas - In December 2015, Texas Gas Service filed a rate case requesting an increase in revenues of $3.1 million for its 
Galveston and South Jefferson County service areas.  Texas Gas Service filed this rate case directly with the incorporated cities, 
and the RRC for the unincorporated areas.  If approved by the cities and the RRC, the new rates will become effective in June 
2016.

In March 2014, Texas Gas Service and the City of El Paso agreed to enter into an annual rate review mechanism called the 
EPARR.  The EPARR provides for a streamlined review of Texas Gas Service’s revenue requirement on an annual basis, and is 
in lieu of a filing under the GRIP statute.  Texas Gas Service continued to file under the GRIP statute for other incorporated 
cities in the EPSA until early 2015, when the other incorporated cities in the EPSA adopted the EPARR mechanism.  GRIP is a 
capital-recovery mechanism that allows for a rate adjustment providing recovery of and a return on incremental capital 
investments made between rate cases.  

In March 2015, Texas Gas Service filed under the EPARR, requesting an increase in revenues of $9.4 million in the City of El 
Paso and surrounding incorporated cities in the EPSA.  The filing included a request to include a payroll adjustment which 
would increase revenues by an additional $1.8 million, for a total increase in revenues of $11.2 million.  In August 2015, Texas 
Gas Service and the incorporated cities in the EPSA reached an agreement on a rate increase of $8.0 million to take effect in 
August 2015.  In April 2015, Texas Gas Service filed with the RRC under the GRIP statute, requesting an increase of $0.4 
million in revenues for the unincorporated areas of the EPSA.  The RRC approved the filing in July 2015.  In November 2015, 
Texas Gas Service notified the EPSA that it would be filing a full rate case in lieu of the EPARR in 2016.

Texas Gas Service filed requests for interim rate relief under the GRIP statute with the City of Austin, Texas, and surrounding 
communities in February 2014 for approximately $5.2 million.  The city councils approved the requested increase effective 
May 2014.  Texas Gas Service received approval for rate relief under the GRIP statute with the City of Austin, Texas, and 
surrounding communities in May 2015, for approximately $3.7 million.  The new rates became effective in June 2015.

Texas Gas Service filed requests for interim rate relief under the GRIP statute with the cities of Austin, Texas, and surrounding 
communities in February 2013 and with El Paso, Texas, in April 2013 for approximately $4.1 million and $4.9 million, 
respectively.  In May 2013, the City of Austin approved the requested increase.  In July 2013, the City of El Paso denied Texas 
Gas Service’s GRIP request, which Texas Gas Service appealed to the RRC.  In September 2013, the RRC approved Texas Gas 
Service’s requested increase. 

In the normal course of business, Texas Gas Service has filed rate cases and sought GRIP and cost-of-service adjustments in 
various other Texas jurisdictions to address investments in rate base and changes in expense.  Annual rate increases totaling 
$4.8 million, $4.0 million and $4.2 million associated with these filings were approved in 2015, 2014 and 2013, respectively. 

Texas Gas Service expects to file a rate case in the Central Texas jurisdiction, which includes the city of Austin, in 2016. 

General - Certain costs to be recovered through the ratemaking process have been capitalized as regulatory assets.  Should 
recovery cease due to regulatory actions, certain of these assets may no longer meet the criteria for recognition and accordingly, 
a writeoff of regulatory assets and stranded costs may be required.  In 2013, as part of the KCC settlement for the separation of 
our Kansas Gas Service assets from ONEOK, we expensed $10.2 million for the remaining balance of certain costs associated 
with ONEOK’s acquisition of Kansas Gas Service in 1997.  There were no writeoffs of regulatory assets resulting from the 
failure to meet the criteria for capitalization during 2015 and 2014. 

29

Selected Financial Results - The following table sets forth certain selected financial results for our operations for the periods 
indicated:

Financial Results

Natural gas sales
Transportation revenues
Cost of natural gas

Net margin, excluding other revenues

Other revenues
Net margin
Operating costs
Depreciation and amortization

Operating income
Capital expenditures

Years Ended December 31,
2014

2013

2015

Variances
2015 vs. 2014
Increase (Decrease)

Variances
2014 vs. 2013
Increase (Decrease)

(Millions of dollars, except percentages)

$

$
$

1,417.9
98.8
706.0
810.7
31.0
841.7
469.6
133.0
239.1
294.3

$

$
$

1,680.1
102.3
991.9
790.5
36.5
827.0
476.0
125.7
225.3
297.1

$

$
$

1,558.5
98.7
876.9
780.3
32.7
813.0
447.9
144.8
220.3
292.1

$

$
$

(262.2)
(3.5)
(285.9)
20.2
(5.5)
14.7
(6.4)
7.3
13.8
(2.8)

(16)% $
(3)%
(29)%
3 %
(15)%
2 %
(1)%
6 %
6 % $
(1)% $

121.6
3.6
115.0
10.2
3.8
14.0
28.1
(19.1)
5.0
5.0

8 %
4 %
13 %
1 %
12 %
2 %
6 %
(13)%
2 %
2 %

The following table sets forth our net margin, excluding other revenues, by type of customer, for the periods indicated:

Net Margin, Excluding Other Revenues
Natural gas sales
Residential
Commercial and industrial
Wholesale and public authority
Net margin on natural gas sales

Transportation revenues

Net margin, excluding other revenues

Years Ended December 31,
2014

2013

2015

Variances
2015 vs. 2014
Increase (Decrease)

Variances
2014 vs. 2013
Increase (Decrease)

(Millions of dollars, except percentages)

$

$

589.8
115.6
6.5
711.9
98.8
810.7

$

$

569.7
112.9
5.6
688.2
102.3
790.5

$

$

564.5
111.5
5.6
681.6
98.7
780.3

$

$

20.1
2.7
0.9
23.7
(3.5)
20.2

4 % $
2 %
16 %
3 %
(3)%
3 % $

5.2
1.4
—
6.6
3.6
10.2

1%
1%
—%
1%
4%
1%

Our net margin on natural gas sales is comprised of two components, fixed and variable margin.  Fixed margin reflects the 
portion of our net margin attributable to the monthly fixed customer charge component of our rates, which does not fluctuate 
based on customer usage in each period.  Variable margin reflects the portion of our net margin that fluctuates with the volumes 
delivered and billed.  We believe that the combination of the significant residential component of our customer base, the fixed 
charge component of our sales margin and our regulatory rate mechanisms in place result in a stable cash flow profile.  The 
following table sets forth our net margin on natural gas sales by revenue type for the periods indicated: 

Net Margin on Natural Gas Sales
Net margin on natural gas sales

Fixed margin
Variable margin
Net margin on natural gas sales

Years Ended December 31,
2014

2013

2015

Variances
2015 vs. 2014
Increase (Decrease)

Variances
2014 vs. 2013
Increase (Decrease)

(Millions of dollars, except percentages)

$

$

519.2
192.7
711.9

$

$

490.4
197.8
688.2

$

$

470.6
211.0
681.6

$

$

28.8
(5.1)
23.7

6 % $
(3)%
3 % $

19.8
(13.2)
6.6

4 %
(6)%
1 %

2015 vs. 2014 - Net margin increased $14.7 million due primarily to the following: 

• 
• 

• 

• 

an increase of $27.5 million from new rates, primarily in Texas and Oklahoma; and
an increase of $4.8 million in residential sales due primarily to customer growth in Oklahoma and Texas; offset 
partially by
a decrease of $6.0 million due to lower line extension revenue, from commercial and industrial customers, and other 
revenues;
a decrease of $4.8 million due to lower sales volumes, net of weather normalization, primarily due to warmer weather 
in 2015;

30

 
 
 
 
 
 
 
 
 
 
 
 
 
• 

• 

a decrease of $3.7 million in rider and surcharge recoveries due to a lower ad-valorem surcharge in Kansas and the 
expiration of the rider associated with the recovery of take-or-pay settlements in Oklahoma, both of which are offset 
by lower regulatory amortization in depreciation and amortization expense; and 
a decrease of $3.1 million due primarily to lower transportation volumes from weather-sensitive customers primarily 
in Kansas.

Operating costs decreased $6.4 million due primarily to the following: 

• 
• 
• 
• 
• 
• 
• 

a decrease of $6.8 million in information technology services associated with our separation from ONEOK;
a decrease of $6.0 million in outside services costs due primarily to operational efficiencies;
a decrease of $4.1 million in legal and worker’s compensation expense;
a decrease of $2.7 million in bad debt expense primarily due to warmer weather in Kansas;
a decrease of $1.4 million in fleet-related expenses due primarily to lower fuel costs; and
a decrease of $0.9 million in ad valorem taxes; offset partially by
an increase of $16.3 million in employee-related costs due primarily to increases of $9.3 million in higher labor costs 
due to an increase in our number of employees and $7.0 million in benefit costs, which includes the impact of the 
changes in our discount rate for pension and other postemployment benefit costs compared with the prior year.

Depreciation and amortization expense increased $7.3 million due primarily to an increase in depreciation of $12.1 million 
from capital expenditures being placed in service, offset partially by a decrease in the amortization of the ad valorem surcharge 
in Kansas and the take-or-pay rider in Oklahoma of $3.6 million.

2014 vs. 2013 - Net margin increased $14.0 million due primarily to the following: 

• 
• 
• 
• 

• 

• 

an increase of $16.8 million from new rates, primarily in Texas and Oklahoma; 
an increase of $5.6 million in residential sales due primarily to customer growth;
an increase of $4.7 million from higher volumes due primarily to weather-sensitive transportation customers; and
an increase of $2.8 million in CNG revenue and higher line extension revenue from commercial and industrial 
customers in Oklahoma; offset partially by
a decrease of $12.8 million in rider and surcharge recoveries due to a lower ad-valorem surcharge in Kansas and the 
expiration of the rider associated with the recovery of take-or-pay settlements in Oklahoma, both of which are offset 
by lower regulatory amortization in depreciation and amortization expense; and 
a decrease of $3.7 million due primarily to warmer weather in all three states compared with colder-than-normal 
weather in 2013, net of weather normalization.

Operating costs increased $28.1 million due primarily to the following: 

• 

• 
• 
• 
• 

an increase of $13.0 million in outside service costs related primarily to $6.8 million of costs associated with our 
separation from ONEOK and $3.7 million in pipeline maintenance activities;
an increase of $12.6 million in insurance, information technology and rent expenses;
an increase of $11.0 million in employee-related expenses resulting from higher labor and compensation costs; and
an increase of $1.7 million in bad debt expense; offset partially by
a decrease of $8.0 million in benefit costs related primarily to lower pension and other postemployment benefit costs 
resulting from an annual change in the estimated discount rate.

Depreciation and amortization expense increased due primarily to the settlement agreement approved by the KCC authorizing 
the separation of the Kansas Gas Service assets from ONEOK to us, whereby Kansas Gas Service agreed to expense a $10.2 
million regulatory asset related to a transaction cost recovery and an increase in the amortization of amounts previously 
deferred for ad valorem taxes, which is offset in net margin.

Capital Expenditures - Our capital expenditures program includes expenditures for pipeline integrity, automated meter reading, 
extending service to new areas, modifications to customer service lines, increasing system capabilities, pipeline replacements, 
government-mandated relocation of pipelines, fleet and facilities, and information technology hardware and software.  It is our 
practice to maintain and upgrade our infrastructure, facilities and systems to ensure safe, reliable and efficient operations.

Capital expenditures decreased $2.8 million for 2015, compared with 2014, due primarily to reduced spending on information 
technology hardware and software in 2014 related to our separation from ONEOK.  Capital expenditures increased $5.0 million 
for 2014, compared with 2013, primarily as a result of an increase in spending on information technology hardware and 
software related to our separation from ONEOK.  Our capital expenditures are expected to be approximately $305.0 million for 
2016.

31

Commercial and industrial

Wholesale and public authority

Transportation

Total customers

Volumes (MMcf)
Natural gas sales
Residential
Commercial and industrial
Wholesale and public authority

Total volumes sold

Transportation

Total volumes delivered

Selected Operating Information - The following tables set forth certain selected operating information for the periods 
indicated:

(in thousands)

2015

2014

Increase (Decrease)

Average Number of Customers

OK

KS

TX

Total

OK

KS

TX

Total

OK

KS

TX

Total

Years Ended
December 31,

Variances

2015 vs. 2014

Residential

783

579

Commercial and industrial

Wholesale and public authority

Transportation

Total customers

73

—

5

50

—

6

606

34

3

1

1,968

157

3

12

776

578

72

—

5

50

—

6

601

34

4

1

1,955

156

4

12

861

635

644

2,140

853

634

640

2,127

7

1

—

—

8

1

—

—

—

1

5

—

(1)

—

4

13

1

(1)

—

13

(in thousands)

2014

2013

Increase (Decrease)

Average Number of Customers

OK

KS

TX

Total

OK

KS

TX

Total

OK

KS

TX

Total

Years Ended
December 31,

Variances

2014 vs. 2013

Residential

776

578

72

—

5

50

—

6

601

34

4

1

1,955

156

4

12

770

577

72

—

5

50

—

6

597

33

3

1

1,944

155

3

12

853

634

640

2,127

847

633

634

2,114

6

—

—

—

6

1

—

—

—

1

4

1

1

—

6

11

1

1

—

13

Years Ended December 31,
2014

2013

2015

115,477
35,943
2,615
154,035
204,763
358,798

125,337
38,555
2,454
166,346
213,456
379,802

122,855
36,956
4,403
164,214
205,915
370,129

Total volumes delivered decreased for 2015, compared with 2014, due primarily to warmer temperatures in 2015.  Residential 
and commercial and industrial natural gas sales volumes increased for 2014, compared with 2013, due primarily to colder 
temperatures in the first quarter of 2014.  The impacts on margins for the periods presented were mitigated largely by weather-
normalization mechanisms. 

Wholesale sales represent contracted natural gas volumes that exceed the needs of our residential, commercial and industrial 
customer base and are available for sale to other parties.  The impact to net margin from changes in volumes associated with 
these customers is minimal. 

32

 
 
 
 
 
 
Years Ended

December 31,

2015

2014

Heating Degree Days

Actual

Normal

Actual

Normal

Oklahoma

Kansas

Texas

3,135

4,264

1,715

3,317

4,860

1,785

3,720

5,179

1,716

3,317

4,860

1,788

Years Ended

December 31,

2014

2013

Heating Degree Days

Actual

Normal

Actual

Normal

2015 vs
2014
Actual
Variance

(16)%

(18)%

— %

2015

2014

Actual as a percent of
Normal

95%

88%

96%

112%

107%

96%

2014 vs
2013
Actual
Variance

2014

2013

Actual as a percent of
Normal

Oklahoma

Kansas

Texas

3,720

5,179

1,716

3,317

4,860

1,788

3,848

5,246

1,942

3,317

4,860

1,793

(3)%

(1)%

(12)%

112%

107%

96%

116%

108%

108%

Normal HDDs are established through rate proceedings in each of our rate jurisdictions for use primarily in weather 
normalization billing calculations.  Normal HDDs disclosed above are based on:

• 

• 

• 

10-year weighted average HDDs as of December 31, 2014, for years 2005-2014, as calculated using 11 weather 
stations across Oklahoma and weighted on average customer count for Oklahoma; 
30-year average for years 1981-2010 published by the National Oceanic and Atmospheric Administration, as 
calculated using 13 weather stations across Kansas and weighted on HDDs by weather station and customers for 
Kansas; and
a rolling 10-year average of actual natural gas distribution sales volumes by service area for Texas.

Actual HDDs are based on quarter-to-date and year-to-date, weighted average of:

• 
• 
• 

11 weather stations and customers by month for Oklahoma; 
13 weather stations and customers by month for Kansas; and
9 weather stations and natural gas distribution sales volumes by service area for Texas.

CONTINGENCIES

We are a party to various litigation matters and claims that have arisen in the normal course of our operations.  While the results 
of litigation and claims cannot be predicted with certainty, we believe the reasonably possible losses from such matters, 
individually and in the aggregate, are not material.  Additionally, we believe the probable final outcome of such matters will not 
have a material adverse effect on our results of operations, financial position or cash flows.  See Note 14 of the Notes to 
Financial Statements in this Annual Report for information with respect to legal proceedings.

LIQUIDITY AND CAPITAL RESOURCES

General - From the date of the separation, we have funded operating expenses, working capital requirements, including 
purchases of natural gas and capital expenditures primarily with operating cash flows and commercial paper.  Prior to the 
separation, we relied primarily on operating cash flow and participation in ONEOK’s cash management program for our 
liquidity and capital resource requirements.

We believe that the combination of the significant residential component of our customer base, the fixed-charge component of 
our natural gas sales net margin and our regulatory rate mechanisms that we have in place result in a stable cash flow profile.  
Because the energy consumption of residential customers is less volatile compared with commercial and industrial customers, 
our business historically has generated stable and predictable net margin and cash flows.  Additionally, we have several 
regulatory rate mechanisms in place to reduce the lag in earning a return on our capital expenditures.  We anticipate that our 

33

cash flow generated from operations and our expected short- and long-term financing arrangements will enable us to maintain 
our current and planned level of operations and provide us flexibility to finance our infrastructure investments.

Our ability to access capital markets for debt and equity financing under reasonable terms depends on market conditions and 
our financial condition and credit ratings.  We believe that stronger credit ratings will provide a significant advantage to our 
business.  By maintaining a conservative financial profile and stable revenue base, we believe that we will be able to maintain 
an investment-grade credit rating, which we believe will provide us access to diverse sources of capital at more favorable rates 
in order to finance our infrastructure investments.  Credit rating agencies perform independent analyses when assigning credit 
ratings. 

Short-term Financing - The ONE Gas Credit Agreement, which is scheduled to expire in January 2019, contains certain 
financial, operational and legal covenants.  Among other things, these covenants include maintaining ONE Gas’ total debt-to-
capital ratio of no more than 70 percent at the end of any calendar quarter.  The ONE Gas Credit Agreement also contains 
customary affirmative and negative covenants, including covenants relating to liens, indebtedness of subsidiaries, investments, 
changes in the nature of business, fundamental changes, transactions with affiliates, burdensome agreements, and use of 
proceeds.  In the event of a breach of certain covenants by ONE Gas, amounts outstanding under the ONE Gas Credit 
Agreement may become due and payable immediately.  At December 31, 2015, our total debt-to-capital ratio was 40 percent, 
and we were in compliance with all covenants under the ONE Gas Credit Agreement.

The ONE Gas Credit Agreement includes a $50 million sublimit for the issuance of standby letters of credit and also features an 
option to request an increase in the size of the facility to an aggregate of $1.2 billion from $700 million, upon satisfaction of 
customary conditions, including receipt of commitments from new lenders or increased commitments from existing lenders.  
Borrowings made under the facility are available for general corporate purposes.  The ONE Gas Credit Agreement contains 
provisions for an applicable margin rate and an annual facility fee, both of which adjust with changes in our credit rating.  
Based on our current credit ratings, borrowings, if any, will accrue interest at LIBOR plus 79.5 basis points, and the annual 
facility fee is 8 basis points.  

We may reduce the unutilized portion of the ONE Gas Credit Agreement in whole or in part without premium or penalty.  The 
ONE Gas Credit Agreement contains customary events of default.  Upon the occurrence of certain events of default, the 
obligations under the ONE Gas Credit Agreement may be accelerated and the commitments may be terminated.

We have a commercial paper program under which we may issue unsecured commercial paper up to a maximum amount of 
$700 million to fund short-term borrowing needs.  The maturities of the commercial paper notes may vary but may not exceed 
270 days from the date of issue.  The commercial paper notes are generally sold at par less a discount representing an interest 
factor.

The ONE Gas Credit Agreement is available to repay the commercial paper notes, if necessary.  Amounts outstanding under the 
commercial paper program reduce the borrowing capacity under the ONE Gas Credit Agreement. 

At December 31, 2015, we had issued $12.5 million in the form of commercial paper, $1.0 million in letters of credit 
outstanding and had approximately $2.4 million of cash and cash equivalents.  At December 31, 2015, we had no borrowings 
and $686.5 million of credit available under the ONE Gas Credit Agreement.  The weighted-average interest rate on our 
commercial paper was 0.7 percent at December 31, 2015.

Debt Issuance - In January 2014, we issued senior notes, consisting of $300 million of 2.07 percent senior notes due 2019, 
$300 million of 3.61 percent senior notes due 2024 and $600 million of 4.658 percent senior notes due 2044 (collectively, our 
“Senior Notes”).  The net proceeds were approximately $1.19 billion and were used to fund a one-time cash payment to 
ONEOK of approximately $1.13 billion as part of the separation.  The remaining portion of the net proceeds was retained in 
order to provide sufficient financial flexibility and to support working capital requirements and capital expenditures.

The indenture governing our Senior Notes includes an event of default upon the acceleration of other indebtedness of $100 
million or more.  Such events of default would entitle the trustee or the holders of 25 percent in aggregate principal amount of 
the outstanding Senior Notes to declare those Senior Notes immediately due and payable in full.

We may redeem our Senior Notes at par, plus accrued and unpaid interest to the redemption date, starting one month, three 
months, and six months, respectively, before their maturity dates.  Prior to these dates, we may redeem these Senior Notes, in 
whole or in part, at a redemption price equal to the principal amount, plus accrued and unpaid interest and a make-whole 
premium.  The redemption price will never be less than 100 percent of the principal amount of the respective Senior Notes plus 

34

accrued and unpaid interest to the redemption date.  Our Senior Notes are senior unsecured obligations, ranking equally in right 
of payment with all of our existing and future unsecured senior indebtedness.

Credit Ratings - Our credit ratings as of January 31, 2016 were:

Rating Agency

Moody’s

S&P

Rating

A2

A-

Outlook

Stable

Stable

Our commercial paper is currently rated Prime-1 by Moody’s and A-2 by S&P.  We intend to maintain strong credit metrics 
while we pursue a balanced approach to capital investment and a return of capital to shareholders via a dividend that we believe 
will be competitive with our peer group.

Capitalization structure - As of December 31, 2015, our total capitalization structure was 40 percent debt to 60 percent equity.

Pension and Other Postemployment Benefit Plans - Information about our pension and other postemployment benefits plans, 
including anticipated contributions, is included under Note 12 of the Notes to Financial Statements in this Annual Report. 

CASH FLOW ANALYSIS

Prior to the separation, we utilized ONEOK’s centralized cash management program that concentrated the cash assets of its 
operating divisions and subsidiaries in joint accounts for the purpose of providing financial flexibility and lowering the cost of 
borrowing, transaction costs and bank fees.  Under this cash management program, depending on whether we had a short-term 
cash surplus or cash requirement, we provided cash to ONEOK or ONEOK provided cash to us when necessary.  Subsequent to 
the separation, we maintain separate cash accounts from ONEOK, and our interest expense is related only to our borrowings.

We use the indirect method to prepare our Statements of Cash Flows.  Under this method, we reconcile net income to cash 
flows provided by operating activities by adjusting net income for those items that impact net income but may not result in 
actual cash receipts or payments and changes in our assets and liabilities not classified as investing or financing activities 
during the period.  Items that impact net income but may not result in actual cash receipts or payments include, but are not 
limited to, depreciation and amortization, deferred income taxes, share-based compensation expense and provision for doubtful 
accounts. 

The following table sets forth the changes in cash flows by operating, investing and financing activities for the periods 
indicated:

Total cash provided by (used in):

Operating activities
Investing activities
Financing activities

Change in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period

Years Ended December 31,

2015

2014

2013

Variances
2015 vs. 2014

Variances
2014 vs. 2013

Increase
(Decrease)

Increase
(Decrease)

(Millions of dollars)

$

$

394.2
(294.3)
(109.4)
(9.5)
11.9
2.4

$

$

246.6
(297.1)
59.2
8.7
3.2
11.9

$

$

154.2
(290.7)
135.7
(0.8)
4.0
3.2

$

$

147.6 $
2.8
(168.6)
(18.2)
8.7
(9.5) $

92.4
(6.4)
(76.5)
9.5
(0.8)
8.7

Operating Cash Flows - Changes in cash flows from operating activities, before changes in operating assets and liabilities, are 
due primarily to changes in net margin and operating expenses discussed in Financial Results and Operating Information.  
Changes in natural gas prices and demand for our services or natural gas, whether because of general economic conditions, 
changes in supply or increased competition from other service providers, could affect our earnings and operating cash flows.  
Typically, our cash flows from operations are greater in the first half of the year compared with the second half of the year.

2015 vs. 2014 - Cash flows from operating assets and liabilities in our operating activities increased in 2015, compared to 2014, 
due primarily to the collection of trade receivables, tax receivables, payment of trade payables and the recovery of natural gas 

35

 
 
 
 
 
 
purchase costs, including natural gas in storage, through our purchased-gas cost adjustment mechanisms, which were impacted 
by warmer weather and lower natural gas costs.  The timing of cash collections from customers and payments to vendors and 
suppliers vary from period to period in the normal course of business and directly impact our cash flows from operations.  In 
addition, our changes in income taxes receivable were impacted by an extension of the IRS rules for bonus depreciation.

2014 vs. 2013 - Cash flows from operating assets and liabilities in our operating activities increased in 2014, compared to 2013, 
due primarily to the collection of trade receivables, payment of trade payables and the recovery of natural gas purchase costs 
through our purchased-gas cost adjustment mechanisms.  The timing of cash collections from customers and payments to 
vendors and suppliers vary from period to period in the normal course of business and directly impact our cash flows from 
operations. 

Investing Cash Flows - 2015 vs. 2014 - Cash used in investing activities decreased for 2015, compared to 2014, due primarily 
to capital expenditures for information technology hardware and software associated with our separation from ONEOK.

2014 vs. 2013 - Cash used in investing activities increased for 2014, compared to 2013, due primarily to capital expenditures 
for information technology hardware and software associated with our separation from ONEOK.

Financing Cash Flows - 2015 vs. 2014 - Cash used in financing activities increased for 2015, compared with 2014, due 
primarily to an increase in the dividend rate of two cents, an additional quarter of dividends paid in 2015, a decrease in our 
outstanding notes payable, and purchases of treasury stock used to offset shares issued under our equity compensation and 
employee stock purchase plans.

2014 vs. 2013 - Cash used in financing activities decreased for 2014, compared with 2013 due primarily to the $1.19 billion 
debt issuance and $1.13 billion cash payment to ONEOK in connection with our separation from ONEOK in 2014, compared 
with our participation in ONEOK’s cash management program and our distributions to ONEOK in 2013.

ENVIRONMENTAL, SAFETY AND REGULATORY MATTERS

Environmental Matters - We are subject to multiple historical, wildlife preservation and environmental laws and/or 
regulations that affect many aspects of our present and future operations.  Regulated activities include, but are not limited to, 
those involving air emissions, storm water and wastewater discharges, handling and disposal of solid and hazardous wastes, 
wetland preservation, hazardous materials transportation, and pipeline and facility construction.  These laws and regulations 
require us to obtain and/or comply with a wide variety of environmental clearances, registrations, licenses, permits and other 
approvals.  Failure to comply with these laws, regulations, licenses and permits may expose us to fines, penalties and/or 
interruptions in our operations that could be material to our results of operations.  In addition, emission controls and/or other 
regulatory or permitting mandates under the Clean Air Act and other similar federal and state laws could require unexpected 
capital expenditures.  We cannot assure that existing environmental statutes and regulations will not be revised or that new 
regulations will not be adopted or become applicable to us.  Revised or additional statutes or regulations that result in increased 
compliance costs or additional operating restrictions could have a material adverse effect on our business, financial condition, 
results of operations and cash flows. 

We own or retain legal responsibility for the environmental conditions at 12 former manufactured natural gas sites in Kansas.  
These sites contain potentially harmful materials that are subject to control or remediation under various environmental laws 
and regulations.  A consent agreement with the KDHE governs all work at these sites.  The terms of the consent agreement 
allow us to investigate these sites and set remediation activities based upon the results of the investigations and risk analysis.  
Remediation involves typically the management of contaminated soils and may involve removal of structures and monitoring 
and/or remediation of groundwater.

We have completed or addressed removal of the source of soil contamination at 11 of the 12 sites according to plans approved 
by KDHE.  Regulatory closure has been achieved at three of the sites.  We have begun site assessment at the remaining site 
where no active remediation has occurred.

Our expenditures for environmental evaluation, mitigation, remediation and compliance to date have not been significant in 
relation to our financial position, results of operations or cash flows, and our expenditures related to environmental matters had 
no material effects on earnings or cash flows during 2015, 2014 and 2013.  A number of environmental issues may exist with 
respect to manufactured gas plants.  With the trend toward stricter standards, greater regulation and more extensive permit 
requirements for the types of assets operated by us that are subject to environmental regulation, our environmental expenditures 
could increase in the future, and such expenditures may not be fully covered by insurance or recoverable in rates from our 
customers, and those costs may adversely affect our financial condition, results of operations and cash flows.

36

Pipeline Safety - We are subject to PHMSA regulations, including integrity-management regulations.  PHMSA regulations 
require pipeline companies operating high-pressure transmission pipelines to perform integrity assessments on pipeline 
segments that pass through densely populated areas or near specifically designated high-consequence areas.  In January 2012, 
the Pipeline Safety, Regulatory Certainty and Job Creation Act was signed into law.  The law increased maximum penalties for 
violating federal pipeline safety regulations and directs the DOT and the Secretary of Transportation to conduct further review 
or studies on issues that may or may not be material to us.  These issues include, but are not limited to, the following:

• 

• 

• 

an evaluation of whether natural gas pipeline integrity-management requirements should be expanded beyond current 
high-consequence areas;
a verification of records for pipelines in class 3 and 4 locations and high-consequence areas to confirm maximum 
allowable operating pressures; and
a requirement to test previously untested pipelines operating above 30 percent yield strength in high-consequence 
areas.

The potential capital and operating expenditures related to this legislation, the associated regulations or other new pipeline 
safety regulations are unknown.

Air and Water Emissions - The Clean Air Act, the Clean Water Act, analogous state laws and/or regulations promulgated 
thereunder, impose restrictions and controls regarding the discharge of pollutants into the air and water in the United States. 
Under the Clean Air Act, a federally enforceable operating permit is required for sources of significant air emissions.  We may 
be required to incur certain capital expenditures for air-pollution-control equipment in connection with obtaining or 
maintaining permits and approvals for sources of air emissions.  We do not expect that these expenditures will have a material 
impact on our respective results of operations, financial position or cash flows.  The Clean Water Act imposes substantial 
potential liability for the removal of pollutants discharged to waters of the United States and remediation of waters affected by 
such discharge.   

Federal, state and regional initiatives to measure and regulate greenhouse gas emissions are underway.  We monitor relevant 
federal and state legislation to assess the potential impact on our operations.  The EPA’s Mandatory Greenhouse Gas Reporting 
Rule requires annual greenhouse gas emissions reporting as carbon dioxide equivalents from affected facilities and for the 
natural gas delivered by us to our natural gas distribution customers who are not otherwise required to report their own 
emissions.  The additional cost to gather and report this emission data did not have, and we do not expect it to have, a material 
impact on our results of operations, financial position or cash flows.  In addition, Congress has considered, and may consider in 
the future, legislation to reduce greenhouse gas emissions, including carbon dioxide and methane.  Likewise, the EPA may 
institute additional regulatory rulemaking associated with greenhouse gas emissions.  At this time, no rule or legislation has 
been enacted that assesses any costs, fees or expenses on any of these emissions.

CERCLA - The federal CERCLA, also commonly known as Superfund, imposes strict, joint and several liability, without 
regard to fault or the legality of the original act, on certain classes of “persons” (defined under CERCLA) that caused and/or 
contributed to the release of a hazardous substance into the environment.  These persons include, but are not limited to, the 
owner or operator of a facility where the release occurred and/or companies that disposed or arranged for the disposal of the 
hazardous substances found at the facility.  Under CERCLA, these persons may be liable for the costs of cleaning up the 
hazardous substances released into the environment, damages to natural resources and the costs of certain health studies.  We 
do not expect that our responsibilities under CERCLA will have a material impact on our respective results of operations, 
financial position or cash flows.

Pipeline Security - The United States Department of Homeland Security’s Transportation Security Administration issued 
updated pipeline security guidelines in April 2012.  Our pipeline facilities have been reviewed according to the current 
guidelines and no material changes have been required to date.

Environmental Footprint - Our environmental and climate change strategy focuses on taking steps to minimize the impact of 
our operations on the environment.  These strategies include: (1) developing and maintaining an accurate greenhouse gas 
emissions inventory according to current rules issued by the EPA; (2) improving the efficiency of our various pipelines; (3) 
following developing technologies for emission control; and (4) utilizing practices to reduce the loss of methane from our 
facilities such as vintage pipe replacement which not only improves system integrity but also helps lower emissions.

We participate in the EPA’s Natural Gas STAR Program to voluntarily reduce methane emissions.  We continue to focus on 
maintaining low rates of lost-and-unaccounted-for natural gas through expanded implementation of best practices to limit the 

37

release of natural gas during pipeline and facility maintenance and operations.  Additionally, the EPA is currently developing a 
methane emissions partnership program expected to be finalized in 2016.

Regulatory - Several regulatory initiatives impacted the earnings and future earnings potential of our business.  See additional 
information regarding our regulatory initiatives in Management’s Discussion and Analysis of Financial Condition and Results 
of Operations.

Additional information about our environmental matters is included in the section entitled “Environmental Matters” in Note 14 
of the Notes to Financial Statements in this Annual Report.  We cannot assure that existing environmental statutes and 
regulations will not be revised or that new regulations will not be adopted or become applicable to us.  Revised or additional 
regulations that result in increased compliance costs or additional operating restrictions could have a material adverse effect on 
our business, financial condition and results of operations.  Our expenditures for environmental evaluation, mitigation, 
remediation and compliance to date have not been significant in relation to our financial position, results of operations or cash 
flows, and our expenditures related to environmental matters had no material effects on earnings or cash flows during 2015, 
2014 and 2013.  We do not expect to incur material expenditures for these matters in the future. 

IMPACT OF NEW ACCOUNTING ST

Information about the impact of new accounting standards is included in Note 1 of the Notes to Financial Statements in this 
Annual Report.

ESTIMATES AND CRITICAL ACCOUNTING POLICIES

The preparation of our financial statements and related disclosures in accordance with GAAP requires us to make estimates and 
assumptions with respect to values or conditions that cannot be known with certainty that affect the reported amounts of assets 
and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements.  These estimates and 
assumptions also affect the reported amounts of revenue and expenses during the reporting period.  Although we believe these 
estimates and assumptions are reasonable, actual results could differ from our estimates. See our Risk Factors and/or Forward-
Looking Statements for factors which could impact our estimates.

The following summary sets forth what we consider to be our most critical estimates and accounting policies.  Our critical 
accounting policies are defined as those estimates and policies most important to the portrayal of our financial condition and 
results of operations and that require management’s most difficult, subjective or complex judgment, particularly because of the 
need to make estimates concerning the impact of inherently uncertain matters. 

Regulation - Our operations are subject to regulation with respect to rates, service, maintenance of accounting records and 
various other matters by the respective regulatory authorities in the states in which we operate.  We account for the financial 
effects of the ratemaking and accounting practices and policies of the various regulatory commissions in our financial 
statements.  We record regulatory assets for costs that have been deferred for which future recovery through customer rates is 
considered probable and regulatory liabilities when it is probable that revenues will be reduced for amounts that will be 
credited to customers through the ratemaking process.  As a result, certain costs that would normally be expensed under GAAP 
are capitalized or deferred on the balance sheet because it is probable they can be recovered through rates.  Discontinuing the 
application of this method of accounting for regulatory assets and liabilities could significantly increase our operating expenses, 
as fewer costs would likely be capitalized or deferred on the balance sheet, which could reduce our net income.  Further, 
regulation may impact the period in which revenues or expenses are recognized.  The amounts to be recovered or recognized 
are based upon historical experience and our understanding of the regulations.  The impact of regulation on our operations may 
be affected by decisions of the regulatory authorities or the issuance of new regulations. 

For further discussion of regulatory assets and liabilities, see Note 9 of the Notes to Financial Statements in this Annual Report. 

Impairment of Goodwill - We assess our goodwill for impairment at least annually as of July 1.  Our goodwill impairment 
analysis performed in 2015 and 2014, utilized a qualitative assessment and did not result in any impairment indicators.  
Subsequent to July 1, 2015, no event has occurred indicating that the fair value is less than the carrying value. 

As part of our goodwill impairment test, we first assess qualitative factors (including macroeconomic conditions, industry and 
market considerations, cost factors and overall financial performance) to determine whether it is more likely than not that our 
fair value is less than our carrying amount.  If further testing is necessary, we perform a two-step impairment test for goodwill.  
In the first step, an initial assessment is made by comparing our fair value with our book value, including goodwill.  If the fair 
value is less than the book value, an impairment is indicated, and we must perform a second test to measure the amount of the 
38

 
impairment.  In the second test, we calculate the implied fair value of the goodwill by deducting the fair value of all tangible 
and intangible net assets from the fair value determined in step one of the assessment.  If the carrying value of the goodwill 
exceeds the implied fair value of the goodwill, we will record an impairment charge. 

To estimate our fair value, we use two generally accepted valuation approaches, an income approach and a market approach, 
using assumptions consistent with a market participant’s perspective.  Under the income approach, we use anticipated cash 
flows over a period of years plus a terminal value and discount these amounts to their present value using appropriate discount 
rates.  Under the market approach, we apply acquisition multiples to forecasted cash flows.  The acquisition multiples used are 
consistent with historical asset transactions.  The forecasted cash flows are based on average forecasted cash flows over a 
period of years. 

Our impairment tests require the use of assumptions and estimates, such as industry economic factors and the profitability of 
future business strategies.  If actual results are not consistent with our assumptions and estimates or our assumptions and 
estimates change due to new information, we may be exposed to future impairment charges. 

See Note 1 of the Notes to Financial Statements in this Annual Report for further discussion of goodwill. 

Pension and Other Postemployment Benefits - We have defined benefit retirement plans covering eligible full-time 
employees.  We also sponsor welfare plans that provide other postemployment medical and life insurance benefits to eligible 
employees who retire with at least five years of service.  In connection with the separation from ONEOK, we entered into an 
Employee Matters Agreement with ONEOK, which provides that our employees no longer participate in benefit plans 
sponsored or maintained by ONEOK as of the separation date.  Effective January 1, 2014, the ONEOK defined benefit pension 
plans and other postemployment benefit plans transferred assets and obligations related to those employees transferring to ONE 
Gas and vested participants who are no longer employees to the new ONE Gas plans.  As a result, we recorded sponsored 
pension and other postemployment plan obligations of approximately $1.1 billion, and sponsored pension and other 
postemployment plan assets of approximately $1.0 billion.  Additionally, as a result of the transfer of unrecognized losses from 
ONEOK, our regulatory assets and deferred income taxes increased $331 million and $86 million, respectively.

Prior to the separation, eligible employees participated in similar defined benefit pension plans and other postemployment 
health and welfare plans (the Plans) sponsored by ONEOK.  We accounted for these plans as multiemployer benefit plans. 
Accordingly, we did not record an asset or liability to recognize the funded status of the Plans.  We recognized a liability only 
for any required contributions to the Plans that were accrued and unpaid at the balance sheet date.  The related pension and 
other postemployment expenses were allocated to us based on plan participants who directly supported our operations.  These 
pension and other postemployment benefit costs included amounts associated with vested participants who are no longer 
employees.  As described in Note 2 of the Notes to Financial Statements in this Annual Report, prior to 2014, ONEOK also 
charged us for the allocated cost of certain employees of ONEOK who provided general and administrative services on our 
behalf.  ONEOK included an allocation of the benefit costs associated with these ONEOK employees based upon its allocation 
methodology, not necessarily specific to the employees providing general and administrative services on our behalf.  See Note 
2 of the Notes to Financial Statements in this Annual Report for discussion of ONEOK’s allocation methodology. 

To calculate the expense and liabilities related to our plans, we utilize an outside actuarial consultant, which uses statistical and 
other factors to anticipate future events.  These factors include assumptions about the discount rate, expected return on plan 
assets, rate of future compensation increases, age and employment periods.  In determining the projected benefit costs, 
assumptions can change from period to period and may result in material changes in the costs we recognize.  

In October 2015, plan amendments were approved to merge our frozen cash-balance defined benefit pension plan covering 
certain Texas Gas Service employees with our defined benefit pension plan covering certain eligible employees.  In addition, 
we announced to eligible pre-65 participants in our postemployment medical plan a change from a self-insured 
postemployment medical plan to a plan providing participants an annual benefit that will allow them to select coverage on a 
healthcare exchange.  As a result, we remeasured the respective plan assets and benefit obligations, effective October 1, 2015, 
which resulted in a reduction in benefit obligations of our postemployment benefit plan of $11.9 million at December 31, 2015.  
Net periodic benefit cost for the plans in 2015 was reduced by $3.4 million.  See Note 12 of the Notes to Financial Statements 
in this Annual Report for additional information. 

During 2015, we recorded net periodic benefit costs of $38.0 million and $5.0 million related to our pension plans and other 
postemployment benefit plans, respectively, prior to regulatory deferrals.  We estimate that in 2016, we will record $32.0 million 
and $1.7 million related to pension plans and other postemployment benefit plans, respectively, prior to regulatory deferrals. 

39

The following table sets forth the weighted-average assumptions used to determine our estimated 2016 net periodic benefit cost 
related to our defined pension and other postemployment benefit plans, and sensitivity to changes with respect to these 
assumptions:

Discount rate
Expected long-term return on plan assets (c)

Rate Used

Cost
Sensitivity (a)

Obligation
Sensitivity (b)

(Millions of dollars)

4.75% $
7.75%/8.0% $

3.7
2.3

$
$

37.3
—

(a) Approximate impact a quarter percentage point decrease in the assumed rate would have on net periodic pension costs. 
(b) Approximate impact a quarter percentage point decrease in the assumed rate would have on defined benefit pension obligation.
(c) Expected long-term rate of return on plan assets for pension and other postemployment benefits are 7.75 percent and 8.0 percent, respectively.

Assumed health care cost-trend rates have a significant effect on the amounts reported for our other postemployment benefit 
plans.  A one percentage point change in assumed health care cost trend rates would have the following effects:

Effect on total of service and interest cost
Effect on other postemployment benefit obligation

One Percentage
Point Increase

One Percentage
Point Decrease

(Millions of dollars)

$
$

0.8
3.6

$
$

(0.7)
(3.8)

During 2015, we contributed approximately $14.1 million to our other postemployment benefit plans.  In 2016, we expect to 
contribute approximately $0.9 million and approximately $5.8 million to our defined benefit pension plan and other 
postemployment benefit plans, respectively.

Revenue Recognition - For regulated deliveries of natural gas, we read meters and bill customers on a monthly cycle.  We 
recognize revenues upon the delivery of natural gas commodity or services rendered to customers.  Revenues are accrued for 
natural gas delivered and services rendered to customers, but not yet billed, based on estimates from the last meter-reading date 
to month end (accrued unbilled revenue).  The billing cycles for customers do not necessarily coincide with the accounting 
periods used for financial reporting purposes.  We accrue unbilled revenues for natural gas that has been delivered but not yet 
billed at the end of an accounting period.  Accrued unbilled revenue is based on a percentage estimate of amounts unbilled each 
month, which is dependent upon a number of factors, some of which require management’s judgment.  These factors include 
customer consumption patterns and the impact of weather on usage. 

Contingencies - Our accounting for contingencies covers a variety of business activities, including contingencies for legal and 
environmental exposures.  We accrue these contingencies when our assessments indicate that it is probable that a liability has 
been incurred or an asset will not be recovered and an amount can be reasonably estimated.  We expense legal fees as incurred 
and base our legal liability estimates on currently available facts and our assessments of the ultimate outcome or resolution.  
Accruals for estimated losses from environmental remediation obligations generally are recognized no later than the completion 
of a remediation feasibility study.  Recoveries of environmental remediation costs from other parties are recorded as assets 
when their receipt is deemed probable.  Our expenditures for environmental evaluation, mitigation, remediation and 
compliance to date have not been significant in relation to our financial position or results of operations, and our expenditures 
related to environmental matters had no material effect on earnings or cash flows for 2015, 2014 and 2013.  Actual results may 
differ from our estimates resulting in an impact, positive or negative, on earnings. 

See Note 14 of the Notes to Financial Statements in this Annual Report for additional discussion of contingencies. 

40

 
 
CONTRACTUAL OBLIGATIONS

The following table sets forth our contractual obligations at December 31, 2015:

Contractual Obligations

(Millions of dollars)

2016

2017

2018

2019

2020

Thereafter

Total

Commercial paper

Long-term debt, including current maturities

Interest payments on debt

Firm transportation and storage capacity contracts

Natural gas purchase commitments

Employee benefit plans

Operating leases

Total

$

$

12.5
—
45.1
178.2
158.1
6.7
4.6
405.2

$

$

— $
—
45.1
148.0
5.0
4.4
4.5
207.0

$

— $
—
45.1
109.4
2.0
4.5
4.2
165.2

$

— $

300.0
39.4
61.3
1.5
25.5
3.5
431.2

$

— $

— $
—
38.9
58.2
0.9
37.5
3.3
138.8

901.3
649.2
54.2
1.5
—
7.0
$ 1,613.2

12.5
1,201.3
862.8
609.3
169.0
78.6
27.1
$ 2,960.6

Commercial paper - Commercial paper includes short-term notes payable with maturities that may vary but may not exceed 
270 days from the date of issue.

Long-term debt and interest payments on debt - Long-term debt includes our three debt issuances at their due dates.  Interest 
payments on debt are calculated by multiplying our long-term debt by the respective coupon rates.

Firm transportation and storage contracts - We are party to fixed-price contracts providing us with firm transportation and 
storage capacity.  The commitments associated with these contracts are recoverable through our purchased-gas cost 
mechanisms as allowed by the applicable regulatory authority. 

Natural gas purchase commitments - We are party to fixed-price and variable-price contracts for the purchase of natural gas.  
Future variable-price natural gas purchase commitments are estimated based on market price information.  Actual future 
variable-price purchase commitments may vary depending on market prices at the time of delivery.  As market information 
changes daily and is potentially volatile, these values may change significantly.  The commitments associated with these 
contracts are recoverable through our purchased-gas cost mechanisms as allowed by the applicable regulatory authority.

Employee benefit plans - Employee benefit plans include our anticipated contribution to maintain the minimum required 
funding level for our pension and other postemployment benefit plans.  See Note 12 of the Notes to Financial Statements in this 
Annual Report for discussion of employee benefit plans. 

Operating leases - Our operating leases include leases for office space, facilities and information technology hardware and 
software. 

FORWARD-LOOKING STATEMENTS

Some of the statements contained and incorporated in this Annual Report are forward-looking statements within the meaning of 
Section 27A of the Securities Act and Section 21E of the Exchange Act.  The forward-looking statements relate to our 
anticipated financial performance, liquidity, management’s plans and objectives for our future operations, our business 
prospects, the outcome of regulatory and legal proceedings, market conditions and other matters.  We make these forward-
looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 
1995.  The following discussion is intended to identify important factors that could cause future outcomes to differ materially 
from those set forth in the forward-looking statements.

Forward-looking statements include the items identified in the preceding paragraph, the information concerning possible or 
assumed future results of our operations and other statements contained or incorporated in this Annual Report identified by 
words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “should,” “goal,” “forecast,” 
“guidance,” “could,” “may,” “continue,” “might,” “potential,” “scheduled,” and other words and terms of similar meaning.

41

One should not place undue reliance on forward-looking statements, which are applicable only as of the date of this Annual 
Report.  Known and unknown risks, uncertainties and other factors may cause our actual results, performance or achievements 
to be materially different from any future results, performance or achievements expressed or implied by forward-looking 
statements.  Those factors may affect our operations, markets, products, services and prices.  In addition to any assumptions 
and other factors referred to specifically in connection with the forward-looking statements, factors that could cause our actual 
results to differ materially from those contemplated in any forward-looking statement include, among others, the following:

• 

• 
• 
• 

• 

• 
• 

• 

• 

• 
• 
• 
• 
• 
• 

• 

• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 

• 
• 
• 
• 
• 
• 
• 

• 

• 

our ability to recover operating costs and amounts equivalent to income taxes, costs of property, plant and equipment 
and regulatory assets in our regulated rates;
our ability to manage our operations and maintenance costs;
changes in regulation, including the application of market rates by state and local agencies;
the economic climate and, particularly, its effect on the natural gas requirements of our residential and
commercial industrial customers;
competition from alternative forms of energy, including, but not limited to, solar power, wind power, geothermal 
energy and biofuels;
conservation efforts of our customers;
variations in weather, including seasonal effects on demand, the occurrence of storms and disasters, and climate 
change;
indebtedness could make us more vulnerable to general adverse economic and industry conditions, limit our ability to 
borrow additional funds and/or place us at competitive disadvantage compared with competitors;
our ability to secure reliable, competitively priced and flexible natural gas transportation and supply, including 
decisions by natural gas producers to reduce production or shut-in producing natural gas wells and expiration of 
existing supply and transportation arrangements that are not replaced with contracts with similar terms and pricing;
the mechanical integrity of facilities operated;
operational hazards and unforeseen operational interruptions;
adverse labor relations;
the effectiveness of our strategies to reduce earnings lag, margin protection strategies and risk mitigation strategies;
our ability to generate sufficient cash flows to meet all of our cash needs;
changes in the financial markets during the periods covered by the forward-looking statements, particularly those 
affecting the availability of capital and our ability to refinance existing debt and fund investments and acquisitions;
actions of rating agencies, including the ratings of debt, general corporate ratings and changes in the rating agencies’ 
ratings criteria;
changes in inflation and interest rates;
our ability to purchase and sell assets at attractive prices and on other attractive terms;
our ability to recover the costs of natural gas purchased for our customers;
impact of potential impairment charges;
volatility and changes in markets for natural gas;
possible loss of LDC franchises or other adverse effects caused by the actions of municipalities;
payment and performance by counterparties and customers as contracted and when due;
changes in regulation of natural gas distribution services, particularly those in Oklahoma, Kansas and Texas;
changes in law resulting from new federal or state energy legislation;
changes in environmental, safety, tax and other laws to which we and our subsidiaries are subject;
advances in technology;
population growth rates and changes in the demographic patterns of the markets we serve;
acts of nature and the potential effects of threatened or actual terrorism, including cyber attacks or breaches of 
technology systems and war;
the sufficiency of insurance coverage to cover losses;
the effects of our strategies to reduce tax payments;
the effects of litigation and regulatory investigations, proceedings, including our rate cases, or inquiries;
changes in accounting standards and corporate governance;
discovery of material weaknesses in our internal controls;
our ability to attract and retain talented management and directors;
the results of financing efforts, including our ability to obtain financing on favorable terms, which can be affected by 
various factors, including our credit ratings and general economic conditions;
declines in the market prices of debt and equity securities and resulting funding requirements for our defined benefit 
pension plans;
the ability to successfully complete merger, acquisition or divestiture plans, regulatory or other limitations imposed as 
a result of a merger, acquisition or divestiture, and the success of the business following a merger, acquisition or 
divestiture;

42

• 

• 

the final resolutions or outcomes with respect to our contingent and other corporate liabilities related to the natural gas 
distribution business and any related actions for indemnification made pursuant to the Separation and Distribution 
Agreement; and
the costs associated with increased regulation and enhanced disclosure and corporate governance requirements 
pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010.

These factors are not necessarily all of the important factors that could cause actual results to differ materially from those 
expressed in any of our forward-looking statements.  Other factors could also have material adverse effects on our future 
results.  These and other risks are described in greater detail in Item 1A, Risk Factors, in this Annual Report.  All forward-
looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors.  
Other than as required under securities laws, we undertake no obligation to update publicly any forward-looking statement 
whether as a result of new information, subsequent events or change in circumstances, expectations or otherwise.

ITEM 7A. 

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our exposure to market risk discussed below includes forward-looking statements.  Our views on market risk are not 
necessarily indicative of actual results that may occur and do not represent the maximum possible gains and losses that may 
occur since actual gains and losses will differ from those estimated based on actual fluctuations in commodity prices or interest 
rates and the timing of transactions.

Commodity Price Risk 

Our commodity price risk, driven primarily by fluctuations in the price of natural gas, is mitigated by our purchased-gas cost 
adjustment mechanisms.  We use derivative instruments to economically hedge the cost of anticipated natural gas purchases 
during the winter heating months to protect our customers from upward market price volatility of natural gas.  Additionally, we 
inject natural gas into storage during the summer months and withdraw the natural gas during the winter heating season.  Gains 
or losses associated with these derivative instruments and storage activities are included in, and recoverable through our 
purchased-gas cost adjustment mechanisms, which are subject to review by regulatory authorities. 

Interest-Rate Risk 

We are exposed to interest-rate risk primarily associated with new debt financing needed to fund capital requirements, 
including future contractual obligations and maturities of long-term and short-term debt.  We expect to manage interest-rate risk 
on future borrowings through the use of fixed-rate debt, floating-rate debt and, at times, interest-rate swaps.  Fixed-rate swaps 
may be used to reduce our risk of increased interest costs during periods of rising interest rates.  Floating-rate swaps may be 
used to convert the fixed rates of long-term borrowings into short-term variable rates. 

Counterparty Credit Risk 

We assess the creditworthiness of our customers.  Those customers who do not meet minimum standards are required to 
provide security, including deposits and other forms of collateral, when appropriate.  With more than 2 million customers 
across three states, we are not exposed materially to a concentration of credit risk.  We maintain a provision for doubtful 
accounts based upon factors surrounding the credit risk of customers, historical trends, consideration of the current credit 
environment and other information.  In most jurisdictions, we are able to recover natural gas costs related to uncollectible 
accounts through our purchased-gas cost adjustment mechanisms. 

43

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44

ITEM 8. 

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Report of Independent Registered Public Accounting Firm 

To the Board of Directors and Shareholders of ONE Gas, Inc.:

In our opinion, the accompanying balance sheets and the related statements of income, comprehensive income, equity and cash 
flows present fairly in all material respects, the financial position of ONE Gas, Inc. (the Company) at December 31, 2015 and 
2014, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2015 in 
conformity with accounting principles generally accepted in the United States of America.  Also in our opinion, the Company 
maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on criteria 
established  in  Internal  Control  -  Integrated  Framework  (2013)  issued  by  the  Committee  of  Sponsoring  Organizations  of  the 
Treadway  Commission  (COSO).   The  Company’s  management  is  responsible  for  these  financial  statements,  for  maintaining 
effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial 
reporting,  included  in  Management’s  Report  on  Internal  Control  Over  Financial  Reporting  appearing  under  Item  9A.    Our 
responsibility is to express opinions on these financial statements and on the Company’s internal control over financial reporting 
based on our audits (which were integrated audits in 2015 and 2014).  We conducted our audits in accordance with the standards 
of the Public Company Accounting Oversight Board (United States).  Those standards require that we plan and perform the audits 
to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective 
internal control over financial reporting was maintained in all material respects.  Our audits of the financial statements included 
examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting 
principles used and significant estimates made by management, and evaluating the overall financial statement presentation.  Our 
audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, 
assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal 
control based on the assessed risk.  Our audits also included performing such other procedures as we considered necessary in the 
circumstances.  We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability 
of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted 
accounting principles.  A company’s internal control over financial reporting includes those policies and procedures that (i) pertain 
to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets 
of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 
statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are 
being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable 
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that 
could have a material effect on the financial statements.

Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements.   Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because 
of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Tulsa, Oklahoma 
February 18, 2016

45

ONE Gas, Inc.
STATEMENTS OF INCOME

Revenues
Cost of natural gas
Net margin
Operating expenses

Operations and maintenance
Depreciation and amortization
General taxes

Total operating expenses
Operating income
Other income
Other expense
Interest expense
Income before income taxes
Income taxes
Net income

Earnings per share

Basic
Diluted

Average shares (thousands)

Basic
Diluted
Dividends declared per share of stock

See accompanying Notes to Financial Statements.

Years Ended December 31,
2014
(Thousands of dollars, except per share amounts)

2013

2015

$

$

1,547,692
705,959
841,733

$

1,818,906
991,949
826,957

1,689,952
876,944
813,008

414,476
133,023
55,105
602,604
239,129
263
(2,813)
(44,570)
192,009
(72,979)
119,030

2.26
2.24

52,578
53,254
1.20

$

$
$

$

420,686
125,722
55,255
601,663
225,294
1,625
(2,949)
(45,842)
178,128
(68,338)
109,790

2.10
2.07

52,364
52,946
0.84

$

$
$

$

393,072
144,758
54,830
592,660
220,348
6,165
(3,680)
(61,366)
161,467
(62,272)
99,195

1.90
1.90

52,319
52,319
—

$

$
$

$

46

 
 
 
 
 
 
 
 
 
 
 
Years Ended December 31,
2014

2013

2015

(Thousands of dollars)
$

109,790

$

119,030

773
773
119,803

$

(1,781)
(1,781)
108,009

$

99,195

—
—
99,195

ONE Gas, Inc.
STATEMENTS OF COMPREHENSIVE INCOME

Net income
Other comprehensive income (loss), net of tax

Change in pension and other postemployment benefit plans liability, net of tax of

$(483), $1,244, and $0, respectively
Total other comprehensive income (loss), net of tax

Comprehensive income

See accompanying Notes to Financial Statements.

$

$

47

 
 
 
 
 
 
 
 
ONE Gas, Inc.
BALANCE SHEETS

Assets

Property, plant and equipment
Property, plant and equipment
Accumulated depreciation and amortization

Net property, plant and equipment

Current assets

Cash and cash equivalents
Accounts receivable, net
Materials and supplies
Income tax receivable
Natural gas in storage
Regulatory assets
Other current assets

Total current assets

Goodwill and other assets

Regulatory assets
Goodwill
Other assets

Total goodwill and other assets
Total assets

See accompanying Notes to Financial Statements.

December 31, December 31,

2015
2014
(Thousands of dollars)

$

$

5,132,682
1,620,771
3,511,911

4,850,201
1,556,481
3,293,720

2,433
216,343
33,325
38,877
142,153
32,925
16,789
482,845

11,943
326,749
27,511
43,800
185,300
50,193
22,005
667,501

435,863
157,953
55,838
649,654
4,644,410

$

478,723
157,953
51,313
687,989
4,649,210

$

48

 
 
 
 
 
 
 
 
 
 
 
 
ONE Gas, Inc.
BALANCE SHEETS
(Continued)

Equity and Liabilities

Equity and long-term debt

Common stock, $0.01 par value:

December 31, December 31,

2015
2014
(Thousands of dollars)

authorized 250,000,000 shares; issued 52,598,005 shares and outstanding 52,259,224 shares at
December 31, 2015; authorized 250,000,000 shares, issued and outstanding 52,083,859 shares at
December 31, 2014

$

Paid-in capital
Retained earnings
Accumulated other comprehensive income (loss)
Treasury stock, at cost: 338,781 shares at December 31, 2015 and no shares at December 31, 2014

Total equity

Long-term debt, excluding current maturities

Total equity and long-term debt

Current liabilities

Current maturities of long-term debt
Notes payable
Accounts payable
Accrued interest
Accrued taxes other than income
Accrued liabilities
Customer deposits
Regulatory liabilities
Other current liabilities

Total current liabilities

Deferred credits and other liabilities

Deferred income taxes
Employee benefit obligations
Other deferred credits

Total deferred credits and other liabilities

Commitments and contingencies
Total liabilities and equity

See accompanying Notes to Financial Statements.

$

526
1,764,875
95,046
(4,401)
(14,491)
1,841,555
1,201,305
3,042,860

521
1,758,796
39,894
(5,174)
—
1,794,037
1,201,311
2,995,348

7
12,500
107,482
18,873
37,249
31,470
60,325
24,615
11,700
304,221

6
42,000
159,064
18,872
44,742
26,019
60,003
32,467
9,260
392,433

951,785
272,309
73,235
1,297,329

894,585
287,779
79,065
1,261,429

$

4,644,410

$

4,649,210

49

 
 
 
 
 
 
 
 
 
 
This page intentionally left blank.

50

ONE Gas, Inc.
STATEMENTS OF CASH FLOWS

Operating activities

Net income
Adjustments to reconcile net income to net cash provided by operating activities:

$

119,030

$

109,790

$

99,195

2015

Years Ended December 31,
2014
(Thousands of dollars)

2013

Depreciation and amortization
Deferred income taxes
Share-based compensation expense
Provision for doubtful accounts
Changes in assets and liabilities:

Accounts receivable
Materials and supplies
Income tax receivable
Natural gas in storage
Asset removal costs
Affiliate payable
Accounts payable
Accrued interest
Accrued taxes other than income
Accrued liabilities
Customer deposits
Regulatory assets and liabilities
Employee benefit obligation
Other assets and liabilities
Cash provided by operating activities

Investing activities

Capital expenditures
Proceeds from sale of assets

Cash used in investing activities

Financing activities

Settlement of short-term notes payable to ONEOK, net
Borrowings on notes payable, net
Repurchase of common stock
Issuance of debt, net of discounts
Long-term debt financing costs
Cash payment to ONEOK upon separation
Issuance of common stock
Dividends paid
Repayment of long-term debt
Distributions to ONEOK

Cash provided by (used in) financing activities
Change in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period

Supplemental cash flow information:

Cash paid for interest, net of amounts capitalized
Cash paid to ONEOK for interest, net of amounts capitalized
Cash (received) paid for income taxes, net
Cash paid to ONEOK for income taxes

See accompanying Notes to Financial Statements.

$

$
$
$
$

51

133,023
63,789
9,187
4,520

105,886
(5,814)
4,923
43,147
(51,608)
—
(59,635)
1
(7,493)
5,451
322
50,658
(15,033)
(6,147)
394,207

(294,320)
—
(294,320)

—
(29,500)
(24,122)
—
—
—
7,051
(62,826)
—
—
(109,397)
(9,510)
11,943
2,433

125,722
49,935
7,613
7,195

23,044
10,868
(43,800)
(19,172)
(47,125)
—
(6,881)
18,743
12,316
21,228
2,643
30,067
(10,102)
(45,421)
246,663

(297,103)
—
(297,103)

—
42,000
—
1,199,994
(11,087)
(1,130,000)
2,001
(43,696)
—
—
59,212
8,772
3,171
11,943

$

$

42,980

$
— $
(5,423) $
— $

21,066

44,603

$
— $
$
— $

144,758
62,205
—
5,460

(102,142)
(1,668)
—
(63,139)
(46,567)
(8,140)
37,241
(1)
2,449
(5,443)
(727)
29,436
—
1,291
154,208

(292,080)
1,327
(290,753)

150,851
—
—
—
—
—
—
—
(206)
(14,969)
135,676
(869)
4,040
3,171

—
61,366
—
67

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
ONE Gas, Inc.
STATEMENTS OF EQUITY

January 1, 2013
Net income
Distributions to ONEOK
Common stock issued
December 31, 2013
Net income
Other comprehensive loss
Net transfers from ONEOK
Reclassification of Owner’s net investment to paid-in capital
Issuance of common stock at the separation
Common stock issued
Common stock dividends - $0.84 per share
December 31, 2014
Net income
Other comprehensive income
Repurchase of common stock
Common stock issued
Common stock dividends - $1.20 per share
December 31, 2015

See accompanying Notes to Financial Statements.

Common
Stock Issued
(Shares)

Common
Stock

Paid-in
Capital
(Thousands of dollars)

Retained
Earnings

— $
—
—
100
100
—
—
—
—
51,941,136
142,623
—
52,083,859
—
—
—
514,146
—

52,598,005 $

— $
—
—
—
—
—
—
—
—
520
1
—
521
—
—
—
5
—
526 $

— $
—
—
—
—
—
—
—
1,749,078
(520)
9,614
624
1,758,796
—
—
—
5,027
1,052
1,764,875 $

—
—
—
—
—
84,214
—
—
—
—
—
(44,320)
39,894
119,030
—
—
—
(63,878)
95,046

52

 
 
   
ONE Gas, Inc.
STATEMENTS OF EQUITY
(Continued)

Treasury
Stock

Owner’s Net
Investment

Accumulated
Other
Comprehensive
Income (Loss)
(Thousands of dollars)

Total Equity

January 1, 2013
Net income
Distributions to ONEOK
Common stock issued
December 31, 2013
Net income
Other comprehensive loss
Net transfers from ONEOK
Reclassification of Owner’s net investment to paid-in capital
Issuance of common stock at the separation
Common stock issued
Common stock dividends - $0.84 per share
December 31, 2014
Net income
Other comprehensive income
Repurchase of common stock
Common stock issued
Common stock dividends - $1.20 per share
December 31, 2015

See accompanying Notes to Financial Statements.

$

$

— $
—
—
—
—
—
—
—
—
—
—
—
—
—
—
(24,122)
9,631
—
(14,491) $

1,154,797 $
99,195
(14,969)
—
1,239,023
25,576
—
484,479
(1,749,078)
—
—
—
—
—
—
—
—
—
— $

— $
—
—
—
—
—
(1,781)
(3,393)
—
—
—
—
(5,174)
—
773
—
—
—
(4,401) $

1,154,797
99,195
(14,969)
—
1,239,023
109,790
(1,781)
481,086
—
—
9,615
(43,696)
1,794,037
119,030
773
(24,122)
14,663
(62,826)
1,841,555

53

 
 
ONE Gas, Inc.
NOTES TO FINANCIAL STATEMENTS

1. 

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Organization and Nature of Operations - Prior to January 31, 2014, ONE Gas was a wholly owned subsidiary of ONEOK 
and comprised its former natural gas distribution business.  On January 8, 2014, ONEOK’s board of directors approved the 
distribution of all the shares of our common stock to holders of ONEOK common stock.  On January 31, 2014, we became an 
independent, publicly traded company as a result of a distribution by ONEOK of our common stock to ONEOK’s shareholders.  
Our common stock began trading “regular-way” under the ticker symbol “OGS” on the NYSE on February 3, 2014.

We provide natural gas distribution services to more than 2 million customers through our divisions in Oklahoma, Kansas and 
Texas through Oklahoma Natural Gas, Kansas Gas Service and Texas Gas Service, respectively.  We serve residential, 
commercial, industrial and transportation customers in all three states.  In addition, we also provide natural gas distribution 
services to wholesale and public authority customers.

Basis of Presentation - Prior to our separation from ONEOK, our financial statements were derived from ONEOK’s financial 
statements, which included its natural gas distribution business as if we, for accounting purposes, had been a separate company 
for all periods presented.  The assets and liabilities in the financial statements have been reflected on a historical basis.  The 
financial statements for periods prior to the separation also include expense allocations for certain corporate functions 
historically performed by ONEOK, including allocations of general corporate expenses related to executive oversight, 
accounting, treasury, tax, legal, information technology and other services.  We believe our assumptions underlying the 
financial statements, including the assumptions regarding the allocation of general corporate expenses from ONEOK, are 
reasonable.  However, the financial statements may not include all of the actual expenses that would have been incurred by us 
and may not reflect our results of operations, financial position and cash flows had we been a separate publicly traded company 
during the periods presented prior to the separation.

Because the operations of the natural gas distribution business within ONEOK were conducted through separate divisions, 
ONEOK’s net investment in us, excluding the long-term line of credit with ONEOK, is shown as owner’s net investment in lieu 
of equity in the financial statements prior to the separation.  Transactions between ONEOK and us that were not part of the 
long-term line of credit with ONEOK or the short-term note payable to ONEOK have been identified in the Statements of 
Equity as a net transfer from ONEOK. 

All financial information presented after the separation represents the results of operations, financial position and cash flows of 
ONE Gas.  Accordingly:

•  Our Statements of Income and Comprehensive Income for the year ended December 31, 2014, consist of the results of 
ONE Gas for the eleven months ended December 31, 2014, and the results of ONE Gas Predecessor for the one month 
ended January 31, 2014.  Our Statements of Income and Comprehensive Income for the year ended December 31, 
2013, consist entirely of the results of ONE Gas Predecessor.  Our net income for the period prior to January 31, 2014, 
was recorded to owner’s net investment.

•  Our Statement of Cash Flows for the year ended December 31, 2014, consists of the results of ONE Gas for the eleven 
months ended December 31, 2014, and the results of ONE Gas Predecessor for the one month ended January 31, 2014.  
Our Statement of Cash Flows for the year ended December 31, 2013, consists entirely of the results of ONE Gas 
Predecessor.

•  Our Statement of Equity for the year ended December 31, 2014, consists of both the activity for ONE Gas Predecessor 

prior to January 31, 2014, and the activity for ONE Gas completed in connection with, and subsequent to, the 
separation on January 31, 2014.  Our Statement of Equity for the year ended December 31, 2013, consists entirely of 
the results of ONE Gas Predecessor.

The financial statements include the accounts of the natural gas distribution business as set forth in “Organization and Nature of 
Operations” above.  All significant balances and transactions between our divisions have been eliminated.

Use of Estimates - The preparation of our financial statements and related disclosures in accordance with GAAP requires us to 
make estimates and assumptions with respect to values or conditions that cannot be known with certainty that affect the 
reported amount of assets and liabilities, and the disclosure of contingent assets and liabilities at the date of the financial 
statements.  These estimates and assumptions also affect the reported amounts of revenue and expenses during the reporting 
period.  Items that may be estimated include, but are not limited to, the economic useful life of assets, fair value of assets and 
liabilities, provisions for doubtful accounts receivable, unbilled revenues for natural gas delivered but for which meters have 

54

not been read, natural gas purchased but for which no invoice has been received, provision for income taxes, including any 
deferred tax valuation allowances, the results of litigation and various other recorded or disclosed amounts.

We evaluate these estimates on an ongoing basis using historical experience and other methods we consider reasonable based 
on the particular circumstances.  Nevertheless, actual results may differ significantly from the estimates.  Any effects on our 
financial position or results of operations from revisions to these estimates are recorded in the period when the facts that give 
rise to the revision become known.

Fair Value Measurements - We define fair value as the price that would be received from the sale of an asset or the transfer of 
a liability in an orderly transaction between market participants at the measurement date.  We use the market and income 
approaches to determine the fair value of our assets and liabilities and consider the markets in which the transactions are 
executed.  We measure the fair value of a group of financial assets and liabilities consistent with how a market participant 
would price the net risk exposure at the measurement date.

Fair Value Hierarchy - At each balance sheet date, we utilize a fair value hierarchy to classify fair value amounts recognized or 
disclosed in our financial statements based on the observability of inputs used to estimate such fair value.  The levels of the 
hierarchy are described below:

•  Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities;
•  Level 2 - Significant observable pricing inputs other than quoted prices included within Level 1 that are, either directly 
or indirectly, observable as of the reporting date.  Essentially, this represents inputs that are derived principally from or 
corroborated by observable market data; and

•  Level 3 - May include one or more unobservable inputs that are significant in establishing a fair value estimate.  These 
unobservable inputs are developed based on the best information available and may include our own internal data.

We recognize transfers into and out of the levels as of the end of each reporting period.

Determining the appropriate classification of our fair value measurements within the fair value hierarchy requires 
management’s judgment regarding the degree to which market data is observable or corroborated by observable market data.  
We categorize derivatives for which fair value is determined using multiple inputs within a single level, based on the lowest 
level input that is significant to the fair value measurement in its entirety.  See Note 8 for additional information regarding our 
fair value measurements.

Cash and Cash Equivalents - Cash equivalents consist of highly liquid investments, which are readily convertible into cash 
and have original maturities of three months or less. 

Revenue Recognition - For regulated deliveries of natural gas, we read meters and bill customers on a monthly cycle.  We 
recognize revenues upon the delivery of the natural gas commodity or services rendered to customers.  The billing cycles for 
customers do not necessarily coincide with the accounting periods used for financial reporting purposes.  Revenues are accrued 
for natural gas delivered and services rendered to customers, but not yet billed.  Accrued unbilled revenue is based on a 
percentage estimate of amounts unbilled each month, which is dependent upon a number of factors, some of which require 
management’s judgment.  These factors include customer consumption patterns and the impact of weather on usage.  The 
amounts of accrued unbilled natural gas sales revenues at December 31, 2015 and 2014, were $109.6 million and $141.7 
million, respectively.

Accounts Receivable - Accounts receivable represent valid claims against nonaffiliated customers for natural gas sold or 
services rendered, net of allowances for doubtful accounts.  We assess the creditworthiness of our customers.  Those customers 
who do not meet minimum standards are required to provide security, including deposits and other forms of collateral, when 
appropriate.  With more than 2 million customers across three states, we are not exposed materially to a concentration of credit 
risk.  We maintain an allowance for doubtful accounts based upon factors surrounding the credit risk of customers, historical 
trends, consideration of the current credit environment and other information.  In Oklahoma, Kansas and most jurisdictions we 
serve in Texas, we are able to recover natural gas costs related to doubtful accounts through purchased-gas cost adjustment 
mechanisms.  At December 31, 2015 and 2014, our allowance for doubtful accounts was $3.5 million and $4.0 million, 
respectively.

Inventories - Natural gas in storage is maintained on the basis of weighted-average cost.  Natural gas inventories that are 
injected into storage are recorded in inventory based on actual purchase costs, including storage and transportation costs.  
Natural gas inventories that are withdrawn from storage are accounted for in our purchased-gas cost adjustment mechanisms at 
the weighted-average inventory cost.

55

Materials and supplies inventories, which are included in other current assets on our Balance Sheets, are stated at the lower of 
weighted-average cost or net realizable value.  Our materials and supplies inventories totaled $33.3 million and $27.5 million at 
December 31, 2015 and 2014, respectively.

Derivatives and Risk Management Activities - We record all derivative instruments at fair value, with the exception of 
normal purchases and normal sales that are expected to result in physical delivery.  The accounting for changes in the fair value 
of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and, if so, 
the reason for holding it, or if regulatory rulings require a different accounting treatment.

If certain conditions are met, we may elect to designate a derivative instrument as a hedge of exposure to changes in fair values 
or cash flows.

The table below summarizes the various ways in which we account for our derivative instruments and the impact on our 
financial statements:

Accounting Treatment

Balance Sheet

Income Statement

Recognition and Measurement

Normal purchases and
normal sales
Mark-to-market

- Fair value not recorded

- Change in fair value not recognized in earnings

- Recorded at fair value

- Change in fair value recognized in, and

recoverable through, the purchased-gas cost 
adjustment mechanisms

We have not elected to designate any of our derivative instruments as hedges.  Gains or losses associated with the fair value of 
commodity derivative instruments entered into by us are included in, and recoverable through, the purchased-gas cost 
adjustment mechanisms.

See Note 8 for additional information regarding our fair value measurements and hedging activities using derivatives.

Property, Plant and Equipment - Our properties are stated at cost, which includes direct construction costs such as direct 
labor, materials, burden and AFUDC.  Generally, the cost of our property retired or sold, plus removal costs, less salvage, is 
charged to accumulated depreciation.  Gains and losses from sales or retirement of an entire operating unit or system of our 
properties are recognized in income.  Maintenance and repairs are charged directly to expense.

AFUDC represents the cost of borrowed funds used to finance construction activities.  We capitalize interest costs during the 
construction or upgrade of qualifying assets.  Capitalized interest is recorded as a reduction to interest expense.

Our properties are depreciated using the straight-line method over their estimated useful lives.  Generally, we apply composite 
depreciation rates to functional groups of property having similar economic circumstances.  We periodically conduct 
depreciation studies to assess the economic lives of our assets.  These depreciation studies are completed as a part of our rate 
proceedings, and the changes in economic lives, if applicable, are implemented prospectively when the new rates are effective.  
Changes in the estimated economic lives of our property, plant and equipment could have a material effect on our financial 
position, results of operations or cash flows.

Property, plant and equipment on our Balance Sheets includes construction work in process for capital projects that have not yet 
been placed in service and therefore are not being depreciated.  Assets are transferred out of construction work in process when 
they are substantially complete and ready for their intended use.

See Note 10 for additional information regarding our property, plant and equipment.

Impairment of Goodwill and Long-Lived Assets - We assess our goodwill for impairment at least annually as of July 1.  Total 
goodwill was $158.0 million at December 31, 2015 and 2014, respectively.  Our goodwill impairment analysis performed in 
2015, 2014 and 2013, utilized a qualitative assessment and did not result in any impairment indicators.  Subsequent to July 1, 
2015, no event has occurred indicating that it is more likely that not that our fair value is less than our carrying value of our net 
assets. 

As part of our goodwill impairment test, we first assess qualitative factors (including macroeconomic conditions, industry and 
market considerations, cost factors and overall financial performance) to determine whether it is more likely than not that our 

56

 
 
 
 
fair value is less than our carrying amount.  If further testing is necessary, we perform a two-step impairment test for goodwill.  
In the first step, an initial assessment is made by comparing our fair value with our book value, including goodwill.  If the fair 
value is less than the book value, an impairment is indicated, and we must perform a second test to measure the amount of the 
impairment.  In the second test, we calculate the implied fair value of the goodwill by deducting the fair value of all tangible 
and intangible net assets from the fair value determined in step one of the assessment.  If the carrying value of the goodwill 
exceeds the implied fair value of the goodwill, we will record an impairment charge.

To estimate our fair value, we use two generally accepted valuation approaches, an income approach and a market approach, 
using assumptions consistent with a market participant’s perspective.  Under the income approach, we use anticipated cash 
flows over a period of years plus a terminal value and discount these amounts to their present value using appropriate discount 
rates.  Under the market approach, we apply acquisition multiples to forecasted cash flows.  The acquisition multiples used are 
consistent with historical asset transactions.  The forecasted cash flows are based on average forecasted cash flows over a 
period of years.

We assess our long-lived assets for impairment whenever events or changes in circumstances indicate that an asset’s carrying 
amount may not be recoverable.  An impairment is indicated if the carrying amount of a long-lived asset exceeds the sum of the 
undiscounted future cash flows expected to result from the use and eventual disposition of the asset.  If an impairment is 
indicated, we record an impairment loss equal to the difference between the carrying value and the fair value of the long-lived 
asset.  We determined that there were no asset impairments in 2015, 2014 or 2013.

Regulation - We are subject to the rate regulation and accounting requirements of the OCC, KCC, RRC and various 
municipalities in Texas.  We follow the accounting and reporting guidance for regulated operations.  During the ratemaking 
process, regulatory authorities set the framework for what we can charge customers for our services and establish the manner 
that our costs are accounted for, including allowing us to defer recognition of certain costs and permitting recovery of the 
amounts through rates over time, as opposed to expensing such costs as incurred.  Examples include weather normalization, 
unrecovered purchased-gas costs, pension and postemployment benefit costs and ad valorem taxes.  This allows us to stabilize 
rates over time rather than passing such costs on to the customer for immediate recovery.  Actions by regulatory authorities 
could have an effect on the amount recovered from rate payers.  Any difference in the amount recoverable and the amount 
deferred is recorded as income or expense at the time of the regulatory action.  A write-off of regulatory assets and costs not 
recovered may be required if all or a portion of the regulated operations have rates that are no longer:

• 
• 
• 

established by independent regulators;
designed to recover the specific entity’s costs of providing regulated services; and
set at levels that will recover our costs when considering the demand and competition for our services.

See Note 9 for additional information regarding our regulatory assets and liabilities disclosures.

Pension and Other Postemployment Employee Benefits - We have defined benefit retirement plans covering eligible 
employees.  We also sponsor welfare plans that provide other postemployment medical and life insurance benefits to eligible 
employees who retire with at least five years of service.  To calculate the costs and liabilities related to our plans, we utilize an 
outside actuarial consultant, which uses statistical and other factors to anticipate future events.  These factors include 
assumptions about the discount rate, expected return on plan assets, rate of future compensation increases, age and mortality 
and employment periods.  In determining the projected benefit obligations and costs, assumptions can change from period to 
period and may result in material changes in the cost and liabilities we recognize.  

Prior to the separation, certain employees participated in pension and other postemployment employee benefit plans sponsored 
by ONEOK.  We accounted for these plans as multiemployer benefit plans.  Accordingly, we did not record an asset or liability 
to recognize the funded status of these plans.  We recognized a liability only for any required contributions to those plans that 
were accrued and unpaid at the balance sheet date.  The related pension and other postemployment expenses were allocated to 
us based on plan participants who directly supported our operations.  These pension and other postemployment benefit costs 
included amounts associated with vested participants who are no longer employees.

Prior to the separation, certain benefit costs associated with employees who directly supported our operations were determined 
based on a specific employee basis.  We were also allocated benefit costs associated with employees of ONEOK that provided 
general corporate services.  These amounts were charged to us by ONEOK as described in Note 2.  Prior to the separation, we 
were not the plan sponsor for the ONEOK pension and other postemployment benefit plans.  Accordingly, our balance sheets 
prior to the separation do not reflect any assets or liabilities related to these plans.  See Note 12 for additional information 
regarding pension and other postemployment employee benefit plans.

57

Income Taxes - Deferred income taxes are recorded for the difference between the financial statement and income tax basis of 
assets and liabilities and carryforward items, based on income tax laws and rates existing at the time the temporary differences 
are expected to reverse.  The effect on deferred taxes of a change in tax rates is deferred and amortized for operations regulated 
by the OCC, KCC, RRC and various municipalities in Texas, if, as a result of an action by a regulator, it is probable that the 
effect of the change in tax rates will be recovered from or returned to customers through future rates.  We continue to amortize 
previously deferred investment tax credits for ratemaking purposes over the periods prescribed by our regulators.

A valuation allowance for deferred tax assets is recognized when it is more likely than not that some or all of the benefit from 
the deferred tax asset will not be realized.  To assess that likelihood, we use estimates and judgment regarding our future 
taxable income, as well as the jurisdiction in which such taxable income is generated, to determine whether a valuation 
allowance is required.  Such evidence can include our current financial position, our results of operations, both actual and 
forecasted, the reversal of deferred tax liabilities, as well as the current and forecasted business economics of our industry.  We 
had no valuation allowance at December 31, 2015 and 2014.

We utilize a more-likely-than-not recognition threshold and measurement attribute for the financial statement recognition and 
measurement of a tax position that is taken or expected to be taken in a tax return.  We reflect penalties and interest as part of 
income tax expense as they become applicable for tax provisions that do not meet the more-likely-than-not recognition 
threshold and measurement attribute.  There were no material uncertain tax positions at December 31, 2015 and 2014.

See Note 13 for additional information regarding income taxes.

Asset Retirement Obligations - Asset retirement obligations represent legal obligations associated with the retirement of long-
lived assets that result from the acquisition, construction, development and/or normal use of the asset.  Certain long-lived assets 
that comprise our natural gas distribution systems, primarily our pipeline assets, are subject to agreements or regulations that 
give rise to an asset retirement obligation for removal or other disposition costs associated with retiring the assets in place upon 
the discontinued use of the natural gas distribution system.  We recognize the fair value of a liability for an asset retirement 
obligation in the period when it is incurred if a reasonable estimate of the fair value can be made.  We are not able to estimate 
reasonably the fair value of the asset retirement obligations for portions of our assets because the settlement dates are 
indeterminable given our expected continued use of the assets with proper maintenance.  We expect our natural gas distribution 
systems will continue in operation as long as natural gas supply and demand for natural gas distribution service exists.  Based 
on the widespread use of natural gas for heating and cooking activities by residential and commercial customers in our service 
areas, management expects supply and demand to exist for the foreseeable future. 

In accordance with long-standing regulatory treatment, we collect through rates the estimated costs of removal on certain 
regulated properties through depreciation expense, with a corresponding credit to accumulated depreciation and amortization.  
These removal costs collected through our rates include costs attributable to legal and nonlegal removal obligations; however, 
the amounts collected that are in excess of these nonlegal asset-removal costs incurred are accounted for as a regulatory 
liability for financial reporting purposes.  Historically, with the exception of the regulatory authority in Kansas, the regulatory 
authorities that have jurisdiction over our regulated operations have not required us to quantify or disclose this amount; rather, 
these costs are addressed prospectively in depreciation rates and are set in each general rate order.  We have made an estimate 
of our regulatory liability using current rates since the last general rate order in each of our jurisdictions; however, for financial 
reporting purposes, significant uncertainty exists regarding the future disposition of this regulatory liability, pending, among 
other issues, clarification of regulatory intent.  We continue to monitor the regulatory requirements, and the liability may be 
adjusted as more information is obtained.  We record the estimated asset removal obligation in noncurrent liabilities in other 
deferred credits on our Balance Sheets.  To the extent this estimated liability is adjusted, such amounts will be reclassified 
between accumulated depreciation and amortization and other deferred credits and therefore will not have an impact on 
earnings. 

Contingencies - Our accounting for contingencies covers a variety of business activities, including contingencies for legal and 
environmental exposures.  We accrue these contingencies when our assessments indicate that it is probable that a liability has 
been incurred or an asset will not be recovered and an amount can be estimated reasonably.  We expense legal fees as incurred 
and base our legal liability estimates on currently available facts and our estimates of the ultimate outcome or resolution.  
Accruals for estimated losses from environmental remediation obligations generally are recognized no later than the completion 
of a remediation feasibility study.  Recoveries of environmental remediation costs from other parties are recorded as assets 
when their receipt is deemed probable.  Actual results may differ from our estimates resulting in an impact, positive or 
negative, on earnings.  See Note 14 for additional information regarding contingencies.

Share-Based Payments - We expense the fair value of share-based payments net of estimated forfeitures.  We estimate 
forfeiture rates based on historical forfeitures under our share-based payment plans.

58

Prior to the separation, ONEOK charged us for compensation expense related to stock-based compensation awards granted to 
our employees that directly supported our operations.  Share-based compensation was also a component of allocated amounts 
charged to us by ONEOK for general and administrative personnel providing services on our behalf. 

Earnings per share - Basic EPS is based on net income and is calculated based upon the daily weighted-average number of 
common shares outstanding during the periods presented.  Also, this calculation includes fully vested stock awards that have 
not yet been issued as common stock. Diluted EPS includes the above, plus unvested stock awards granted under our 
compensation plans, but only to the extent these instruments dilute earnings per share. 

Segments - We operate in one reportable business segment:  regulated public utilities that deliver natural gas to residential, 
commercial, industrial and transportation customers.  We define reportable business segments as components of an organization 
for which discrete financial information is available and operating results are evaluated on a regular basis by the chief operating 
decision maker (CODM) in order to assess performance and allocate resources.  Our CODM is our Chief Executive Officer 
(CEO).  Characteristics of our organization that were relied upon in making this determination include the similar nature of 
services we provide, the functional alignment of our organizational structure, and the reports that are regularly reviewed by the 
CODM for the purpose of assessing performance and allocating resources.  Our management is functionally aligned and 
centralized, with performance evaluated based upon results of the entire distribution business.  Capital allocation decisions are 
driven by asset integrity management and operating efficiency, not geographic location.

We evaluate performance based principally on operating income.  Affiliate sales are recorded on the same basis as sales to 
unaffiliated customers and are discussed in further detail in Note 2.  Net margin is comprised of total revenues less cost of 
natural gas.  Cost of natural gas includes commodity purchases, fuel, storage and transportation costs and does not include an 
allocation of general operating costs or depreciation and amortization.

In 2015, 2014 and 2013, we had no single external customer from which we received 10 percent or more of our gross revenues.

Treasury Stock - We record treasury stock purchases at cost, which includes incremental direct transaction costs.  Amounts are 
recorded as reductions in equity in our Balance Sheets.  We record the reissuance of treasury stock at our weighted average cost 
of treasury shares recorded in equity in our Balance Sheets.

Recently Issued Accounting Standards Update - In October 2015, the FASB issued ASU 2015-17, “Balance Sheet 
Classification of Deferred Taxes,” to simplify reporting of deferred taxes.  The new guidance requires all deferred tax assets 
and liabilities, along with any related valuation allowance, be classified as noncurrent on the balance sheet.  This guidance is 
required to be adopted for our interim and annual reports for periods beginning after December 15, 2016, but early adoption is 
permitted.  We have adopted this guidance early to simplify our financial reporting process, have applied it prospectively for 
the period beginning October 1, 2015, and it did not have a material impact on our financial statements.  Prior periods were not 
retrospectively adjusted.

In August 2015, the FASB issued ASU 2015-15, “Interest-Imputation of Interest (Subtopic 835-30),” which specifically 
addresses the presentation and subsequent measurement of debt issuance costs associated with line of credit arrangements. We 
do not expect this issued guidance, which will be adopted concurrently with ASU 2015-03, to have a material impact on our 
financial statements.

In April 2015, the FASB issued ASU 2015-03, “Interest-Imputation of Interest,” which requires that debt issuance costs related 
to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt 
liability. We do not expect this issued guidance, which is required to be adopted for our interim and annual reports for periods 
beginning after December 15, 2015, to have a material impact on our financial statements.

In April 2015, the FASB issued ASU 2015-05, “Intangibles-Goodwill and Other-Internal-Use Software,” which helps entities 
evaluate the accounting for fees paid by a customer in a cloud computing arrangement. We do not expect this issued guidance, 
which is required to be adopted for our interim and annual reports for periods beginning after December 15, 2015, to have a 
material impact on our financial statements.

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which clarifies and converges the 
revenue recognition principles under GAAP and IFRS. In July 2015, FASB delayed the effective date of ASU 2014-09 for one 
year. We are evaluating the impact of this recently issued guidance, which is required to be adopted for our interim and annual 
reports beginning with the first quarter 2018.

59

2. 

SEPARATION & RELATED-PARTY TRANSACTIONS

Distribution - On January 8, 2014, ONEOK’s board of directors approved the distribution of our common stock to holders of 
ONEOK common stock.  

In order for ONEOK to effect the distribution, we requested, and the SEC declared effective, our Registration Statement on 
Form 10 on January 10, 2014.  ONEOK transferred all of the assets and liabilities primarily related to its natural gas 
distribution business to us.  Assets and liabilities included accounts receivable and payable, natural gas in storage, regulatory 
assets and liabilities, pipeline and other natural gas distribution facilities, customer deposits, employee-related assets and 
liabilities, including amounts attributable to pension and other postemployment benefits, tax-related assets and liabilities and 
other assets and liabilities primarily associated with providing natural gas distribution service in Oklahoma, Kansas and Texas.  
Cash and certain corporate assets, such as office space in the corporate headquarters and certain IT hardware and software, 
were not transferred to us; however, a Transition Services Agreement between ONEOK and us provided access to such 
corporate assets as necessary to operate our business for a period of time to enable us to obtain the applicable corporate assets.  

Immediately prior to the contribution of the natural gas distribution business to us, ONEOK contributed to the capital of the 
natural gas distribution business all of the amounts outstanding on the natural gas distribution business’ short-term note payable 
to and long-term line of credit with ONEOK.  We received approximately $1.19 billion of cash from a private placement of 
senior notes, which were later exchanged for registered notes, then used a portion of those proceeds to fund a cash payment of 
approximately $1.13 billion to ONEOK.  Effective January 31, 2014, the number of our authorized shares increased to 250 
million shares of common stock and 50 million of preferred stock.  On January 31, 2014, ONEOK distributed one share of our 
common stock for every four shares of ONEOK common stock held by ONEOK shareholders of record as of the close of 
business on January 21, 2014, the record date of the distribution.  At the close of business on January 31, 2014, we became an 
independent, publicly traded company as a result of the distribution. 

Reorganization Adjustments - We entered into the Separation and Distribution Agreement and several other agreements with 
ONEOK to effect the separation and provide a framework for our relationships with ONEOK after the distribution.  These 
agreements govern the relationship between ONEOK and us subsequent to the completion of the distribution, and provide for 
the allocation among ONEOK and us of the assets, liabilities and obligations (including employee benefits and tax-related 
assets and liabilities) relating to the natural gas distribution business attributable to periods prior to, at and after the distribution.  
In accordance with the terms of the Separation and Distribution Agreement, ONEOK contributed the assets and liabilities of its 
natural gas distribution business to us.  The noncash contributions below represent ONEOK assets and liabilities attributable to 
pension and other postemployment employee benefits, general corporate assets and liabilities and related deferred taxes not 
included previously in the ONE Gas Predecessor balance sheet, but the costs for which were included in ONE Gas 
Predecessor’s results of operations.  The table below also includes the contribution of the short-term note payable to and long-
term line of credit with ONEOK previously included in ONE Gas Predecessor balance sheets.  The assets and liabilities below 
were recorded at historical cost as the reorganization was among entities under common control.  Net transfers from ONEOK 
included:

(Thousands of dollars)

Property, plant and equipment, net

Regulatory assets, pension and other postemployment benefits

Other assets

Long-term line of credit with ONEOK

Short-term note payable to ONEOK

Pension and other postemployment benefits - liabilities

Other liabilities

Deferred taxes

Accumulated other comprehensive loss

Net contribution of assets (liabilities)

Less: Cash paid to ONEOK

  Net transfers from ONEOK

$

$

$

21,459

331,148

80,700

1,027,631

397,857

(123,800)

(34,404)

(86,112)

(3,393)

1,611,086

1,130,000

481,086

Affiliate Transactions - Prior to our separation, we had certain transactions with ONEOK and its subsidiaries.  We purchased a 
portion of our natural gas supply and natural gas transportation and storage services from ONEOK and its affiliates.  These 

60

contracts were awarded through a competitive-bidding process, and the costs were recoverable through our purchased-gas cost 
adjustment mechanisms.

Prior to our separation, the Statements of Income included expense allocations for certain corporate functions historically 
performed by ONEOK and allocated to its natural gas distribution business, including allocations of general corporate expenses 
related to executive oversight, accounting, treasury, tax, legal, information technology and facilities maintenance.  Where costs 
were incurred specifically on our behalf, the costs were billed directly to us by ONEOK.  In other situations, the costs were 
allocated to us through a variety of methods, depending upon the nature of the expenses.  For example, a service that applied 
equally to all employees of ONEOK was allocated based upon the number of employees in each ONEOK affiliate.  An expense 
benefiting us but having no direct basis for allocation was allocated by the modified Distrigas method, a method using a 
combination of ratios that include gross plant and investment, operating income and payroll expense.  It is not practicable to 
determine what these general overhead costs would be on a stand-alone basis.  These allocations included the following costs:

Corporate Services - These represent costs for certain employees of ONEOK who provided general and administrative services 
on our behalf.  These charges were either directly identifiable or allocated based upon usage factors for our operations.  In 
addition, we received other allocated costs for our share of general corporate expenses of ONEOK, which were determined 
based on our relative use of the service or, if there was no direct basis for allocation, were allocated by the modified Distrigas 
method.  All of these costs are reflected in operations and maintenance and depreciation expense in the Statements of Income.

Benefit Plans and Incentives - These represent benefit costs and other incentives, including group health and welfare benefits, 
pension plans, other postemployment benefit plans and employee stock-based compensation plans.  Costs associated with 
incentive and stock-based compensation plans were determined on a specific identification basis for certain employees who 
directly supported our operations.  All other employee benefit costs historically were allocated using a percentage factor 
derived from a ratio of benefit costs to salary costs for ONEOK’s employees.  These expenses are included in operations and 
maintenance expenses in the Statements of Income.

Total compensation cost, which included costs for both employees who directly supported our operations and allocations for 
corporate services, charged to us by ONEOK related to share-based payment plans was $15.5 million during 2013.  
Compensation costs charged to us by ONEOK in 2014 were not material.  See Note 11 for additional information regarding 
share-based payments.  Total cost charged to us by ONEOK related to pension and other postemployment health and welfare 
plans was $52.1 million during 2013, which is net of amounts deferred through regulatory mechanisms of $1.8 million during 
2013.  Cost related to pension and other postemployment health and welfare plans which was charged to us by ONEOK in 2014 
was not material.   See Note 12 for additional information regarding employee benefit plans.

Interest Expense - ONEOK utilized a centralized approach to cash management and the financing of its businesses.  Cash 
receipts and cash expenditures for costs and expenses from our operations were transferred to or from ONEOK on a regular 
basis and recorded as increases or decreases in the balance due in short-term note payable to ONEOK under an unsecured 
promissory note we had in place with ONEOK.  The amounts outstanding under the long-term line of credit with ONEOK and 
the short-term note payable to ONEOK accrued interest based on ONEOK’s weighted-average cost of long-term and short-term 
debt, respectively.

The weighted average interest rate on amounts outstanding under the long-term line of credit with ONEOK was 5.79 percent in 
2013.   The interest rate on the revolver was reset each year based on ONEOK’s outstanding debt plus an adjustment of 50 basis 
points for ONEOK’s cost to administer the program.

The weighted-average interest rate for the short-term notes payable to ONEOK was 0.92 percent for 2013.  Principal under 
these notes payable beared interest based on ONEOK’s weighted-average cost of short-term debt, plus a utilization fee of 50 
basis points, calculated monthly. 

61

The following table shows ONEOK’s and its subsidiaries’ transactions with us included in the Statements of Income for the 
periods indicated:

Cost of natural gas
Operations and maintenance

Direct employee labor and benefit costs
Allocated employee labor and benefit costs
Charges for general and administrative services

Depreciation and amortization
Other (income)/expense, net
Interest expense

Total

Year Ended December 31,
2013

(Thousands of dollars)

$

$

226,582

177,526
29,955
36,078
6,940
(5,073)
60,930
532,938

Employee labor and benefit costs capitalized totaled $49.3 million for 2013.  In addition, we recorded regulated utility revenue 
from ONEOK and its subsidiaries.  This amount was immaterial for the period presented.

The remaining related party transactions prior to the separation were not material in 2014.  

3. 

CREDIT FACILITY AND SHORT-TERM NOTES PAYABLE

ONE Gas Credit Agreement - The ONE Gas Credit Agreement contains certain financial, operational and legal covenants.  
Among other things, these covenants include maintaining ONE Gas’ total debt-to-capital ratio of no more than 70 percent at the 
end of any calendar quarter.  The ONE Gas Credit Agreement also contains customary affirmative and negative covenants, 
including covenants relating to liens, indebtedness of subsidiaries, investments, changes in the nature of business, fundamental 
changes, transactions with affiliates, burdensome agreements, and use of proceeds.  In the event of a breach of certain 
covenants by ONE Gas, amounts outstanding under the ONE Gas Credit Agreement may become due and payable immediately.  
At December 31, 2015, our total debt-to-capital ratio was 40 percent and we were in compliance with all covenants under the 
ONE Gas Credit Agreement.

The ONE Gas Credit Agreement includes a $50 million sublimit for the issuance of standby letters of credit and also features an 
option to request an increase in the size of the facility to an aggregate of $1.2 billion from $700 million by either commitments 
from new lenders or increased commitments from existing lenders.  Borrowings made under the facility are available for 
general corporate purposes.  The ONE Gas Credit Agreement contains provisions for an applicable margin rate and an annual 
facility fee, both of which adjust with changes in our credit rating.  Based on our current credit ratings, borrowings, if any, will 
accrue interest at LIBOR plus 79.5 basis points, and the annual facility fee is 8 basis points.

We have a commercial paper program under which we may issue unsecured commercial paper up to a maximum amount of 
$700 million to fund short-term borrowing needs.  The maturities of the commercial paper notes may vary but may not exceed 
270 days from the date of issue.  The commercial paper notes are sold generally at par less a discount representing an interest 
factor.

The ONE Gas Credit Agreement is available to repay the commercial paper notes, if necessary.  Amounts outstanding under the 
commercial paper program reduce the borrowing capacity under the ONE Gas Credit Agreement.  At December 31, 2015, we 
had $12.5 million of commercial paper and $1.0 million in letters of credit issued under the ONE Gas Credit Agreement, with 
no borrowings and $686.5 million of remaining credit available under the ONE Gas Credit Agreement.  The weighted-average 
interest rate on our commercial paper was 0.70 percent and 0.32 percent at December 31, 2015 and 2014, respectively.

4. 

LONG-TERM DEBT

Senior notes issuance - In January 2014, we issued senior notes, consisting of $300 million of 2.07 percent senior notes due 
2019, $300 million of 3.61 percent senior notes due 2024 and $600 million of 4.658 percent senior notes due 2044 
(collectively, our “Senior Notes”).  The net proceeds were approximately $1.19 billion and were used to fund a one-time cash 

62

 
 
 
 
payment to ONEOK of approximately $1.13 billion as part of the separation.  The remaining portion of the net proceeds was 
retained in order to provide sufficient financial flexibility and to support working capital requirements and capital expenditures.

The indenture governing our Senior Notes includes an event of default upon the acceleration of other indebtedness of $100 
million or more.  Such events of default would entitle the trustee or the holders of 25 percent in the aggregate principal amount 
of the outstanding Senior Notes to declare those senior notes immediately due and payable in full.

We may redeem our Senior Notes at par, plus accrued and unpaid interest to the redemption date, starting one month, three 
months, and six months, respectively, before their maturity dates.  Prior to these dates, we may redeem these Senior Notes, in 
whole or in part, at a redemption price equal to the principal amount, plus accrued and unpaid interest and a make-whole 
premium.  The redemption price will never be less than 100 percent of the principal amount of the respective note plus accrued 
and unpaid interest to the redemption date.  Our Senior Notes are senior unsecured obligations, ranking equally in right of 
payment with all of our existing and future unsecured senior indebtedness.

5. 

EQUITY

Preferred Stock - At December 31, 2015, we have 50 million, $0.01 par value, authorized shares of preferred stock available.  
We have not issued or established any classes or series of shares of preferred stock.

Common Stock - At December 31, 2015, we had approximately 197.4 million shares of authorized common stock available for 
issuance. 

Treasury Shares - We purchase treasury shares to be used to offset shares issued under our employee and non-employee 
director equity compensation and employee stock purchase plans.  Our Board of Directors established an annual limit of $20 
million of treasury stock purchases, exclusive of funds received through the dividend reinvestment and employee stock 
purchase plans.  Stock purchases may be made in the open market or in private transactions at times, and in amounts that we 
deem appropriate. There is no guarantee as to the exact number of shares that we purchase, and we can terminate or limit the 
program at any time. We hold the purchased shares as treasury shares and account for them using the cost method. 

Dividends Declared - In January 2016, a dividend of $0.35 per share ($1.40 per share on an annualized basis) was declared for 
shareholders of record on February 26, 2016, payable March 11, 2016.

63

6. 

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table sets forth the balance in accumulated other comprehensive income (loss) for the period indicated:

Accumulated Other
Comprehensive
Income (Loss)
(Thousands of dollars)
—
$

January 1, 2014

Transfers in upon separation

Pension and other postemployment benefit plans obligations

Other comprehensive income (loss) before reclassification, net of tax of $1,442

Amounts reclassified from accumulated other comprehensive income (loss), net of tax of $(198)
Other comprehensive income (loss)

December 31, 2014
Pension and other postemployment benefit plans obligations

Other comprehensive income (loss) before reclassification, net of tax of $(130)

Amounts reclassified from accumulated other comprehensive income (loss), net of tax of $(353)
Other comprehensive income (loss)

December 31, 2015

$

(3,393)

(2,096)

315
(1,781)
(5,174)

209

564
773
(4,401)

The following table sets forth the effect of reclassifications from accumulated other comprehensive income (loss) on our 
Statements of Income for the period indicated:

Details about Accumulated Other Comprehensive Income

Year Ended December 31,

Affected Line Item in the

(Loss) Components

2015

2014

Statements of Income

Pension and other postemployment benefit plan obligations (a)

Amortization of net loss
Amortization of unrecognized prior service cost

Regulatory adjustments (b)

Total reclassifications for the period

(Thousands of dollars)

$

$

47,494
(1,962)
45,532
(44,615)
917
(353)
564

$

$

34,169
(1,211)
32,958
(32,445)

513 Income before income taxes
(198) Income tax expense
315 Net income

(a) These components of accumulated other comprehensive income (loss) are included in the computation of net periodic benefit cost. See 
Note 12 for additional information regarding our net periodic benefit cost.
(b) Regulatory adjustments represent pension and other postemployment benefit costs expected to be recovered through rates and are deferred 
as part of our regulatory assets.  See Note 9 for additional information regarding our regulatory assets and liabilities.

7. 

EARNINGS PER SHARE

The following tables set forth the computation of basic and diluted EPS from continuing operations for the periods indicated:

Year Ended December 31, 2015

Income

Shares
(Thousands, except per share amounts)

Per Share
Amount

Basic EPS Calculation

Net income available for common stock

Diluted EPS Calculation

Effect of dilutive securities

Net income available for common stock and common stock equivalents

$

$

119,030

52,578

$

2.26

—

119,030

676

53,254

$

2.24

64

 
 
 
 
 
 
 
 
 
 
Basic EPS Calculation

Net income available for common stock

Diluted EPS Calculation

Effect of dilutive securities

Net income available for common stock and common stock equivalents

Basic EPS Calculation

Net income available for common stock

Diluted EPS Calculation

Effect of dilutive securities

Net income available for common stock and common stock equivalents

$

$

$

$

Year Ended December 31, 2014

Income

Shares
(Thousands, except per share amounts)

Per Share
Amount

109,790

52,364

$

2.10

—

109,790

582

52,946

$

2.07

Year Ended December 31, 2013

Income

Shares
(Thousands, except per share amounts)

Per Share
Amount

99,195

52,319

$

1.90

—

99,195

—

52,319

$

1.90

On January 31, 2014, 51,941,236 shares of our common stock were distributed to ONEOK shareholders in conjunction with the 
separation.  For comparative purposes, and to provide a more meaningful calculation of weighted-average shares outstanding, 
we have assumed this amount and any shares associated with fully vested stock awards that have not been issued to be 
outstanding as of the beginning of each period prior to the separation presented in the calculation of weighted-average shares.

8. 

DERIVATIVE FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS

Derivative Instruments - At December 31, 2015, we held purchased natural gas call options for the heating season ending 
March 2016, with total notional amounts of 17.0 Bcf, for which we paid premiums of $5.8 million, and had a fair value of $0.4 
million.   At December 31, 2014, we held purchased natural gas call options for the heating season ended March 2015, with 
total notional amounts of 16.0 Bcf, for which we paid premiums of $6.4 million, and had a fair value of $0.1 million.  The 
premiums paid and any cash settlements received are recorded as part of our unrecovered purchased-gas costs in current 
regulatory assets as these contracts are included in, and recoverable through, the purchased-gas cost adjustment mechanisms.  
Additionally, changes in fair value associated with these contracts are deferred as part of our unrecovered purchased-gas costs 
in our Balance Sheets.  Our natural gas call options are classified as Level 1 as fair value amounts are based on unadjusted 
quoted prices in active markets including NYMEX-settled prices.  There were no transfers between levels for the periods 
presented.

Other Financial Instruments - The approximate fair value of cash and cash equivalents, accounts receivable and accounts 
payable is equal to book value, due to the short-term nature of these items.  Our cash and cash equivalents are comprised of 
bank and money market accounts, and are classified as Level 1.

Short-term notes payable and commercial paper are due upon demand and, therefore, the carrying amounts approximate fair 
value and are classified as Level 1.  The book value of our long-term debt, including current maturities, was $1.2 billion at both 
December 31, 2015 and 2014.  The estimated fair value of our long-term debt, including current maturities, was $1.2 
billion and $1.3 billion at December 31, 2015 and 2014, respectively.  The estimated fair value of our Senior Notes was 
determined using quoted market prices, and are considered Level 2.

65

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
9. 

REGULATORY ASSETS AND LIABILITIES

The table below presents a summary of regulatory assets, net of amortization, and liabilities for the periods indicated:

December 31, 2015

Under-recovered purchased-gas costs
Pension and other postemployment benefit costs
Weather normalization
Reacquired debt costs
Other

Total regulatory assets, net of amortization

Accumulated removal costs (a)
Over-recovered purchased-gas costs
Ad valorem tax

Total regulatory liabilities

Net regulatory assets and liabilities

(a) Included in other deferred credits in our Balance Sheets.

Under-recovered purchased-gas costs
Pension and other postemployment benefit costs
Reacquired debt costs
Other

Total regulatory assets, net of amortization

Accumulated removal costs (a)
Weather normalization
Over-recovered purchased-gas costs
Ad valorem tax

Total regulatory liabilities
Net regulatory assets and liabilities

(a) Included in other deferred credits in our Balance Sheets.

Remaining
Recovery Period

1 year
See Note 12
1 year
12 years
1 to 23 years

up to 50 years
1 year
1 year

Remaining
Recovery Period

1 year
See Note 12
13 years
1 to 24 years

up to 50 years
1 year
1 year
1 year

Current

Noncurrent
(Thousands of dollars)
— $

$

$ 13,336
15,670
2,198
812
909
32,925
—
(22,884)
(1,731)
(24,615)

425,175
—
8,919
1,769
435,863
(9,032)
—
—
(9,032)

Total

13,336
440,845
2,198
9,731
2,678
468,788
(9,032)
(22,884)
(1,731)
(33,647)

$

8,310

$

426,831

$ 435,141

December 31, 2014

Current

Noncurrent
(Thousands of dollars)
— $

$

Total

$ 28,712
18,108
812
2,561
50,193
—
(16,516)
(13,055)
(2,896)
(32,467)
$ 17,726

466,684
9,730
2,309
478,723
(15,451)
—
—
—
(15,451)
463,272

$

28,712
484,792
10,542
4,870
528,916
(15,451)
(16,516)
(13,055)
(2,896)
(47,918)
$ 480,998

Regulatory assets on our Balance Sheets, as authorized by the various regulatory authorities, are probable of recovery.  Base 
rates are designed to provide a recovery of cost during the period rates are in effect but do not generally provide for a return on 
investment for amounts we have deferred as regulatory assets.  All of our regulatory assets recoverable through base rates are 
subject to review by the respective regulatory authorities during future rate proceedings.  We are not aware of any evidence that 
these costs will not be recoverable through either rate riders or base rates, and we believe that we will be able to recover such 
costs, consistent with our historical recoveries.

Purchased-gas costs represent the natural gas costs that have been over- or under-recovered from customers through the 
purchased-gas cost adjustment mechanisms, and includes natural gas utilized in our operations and premiums paid and any cash 
settlements received from our purchased natural gas call options.

We amortize reacquired debt costs in accordance with the accounting guidelines prescribed by the OCC and KCC.

In December 2013, the KCC approved a settlement agreement between ONEOK, the staff of the KCC, and the Citizens’ Utility 
Ratepayer Board that authorized the transfer of ONEOK’s Kansas Gas Service natural gas distribution assets to us.  As a result, 
Kansas Gas Service expensed certain transition costs associated with ONEOK’s acquisition of Kansas Gas Service in 1997 that 
previously had been recorded as a regulatory asset and amortized and recovered in rates over a 40-year period.  As such, we 
recorded a noncash charge to income of approximately $10.2 million before taxes during 2013 in depreciation and 
amortization.

66

Weather normalization represents revenue over- or under-recovered through the weather normalization adjustment rider in 
Kansas. This amount is deferred as a regulatory asset or liability for a 12-month period. Kansas Gas Service then applies an 
adjustment to the customers’ bills for 12 months to refund the over-collected revenue or bill the under-collected revenue.

Ad valorem tax represents an increase or decrease in Kansas Gas Service’s taxes above or below the amount approved in a rate 
case.  This amount is deferred as a regulatory asset or liability for a 12-month period. Kansas Gas Service then applies an 
adjustment to the customers’ bills for 12 months to refund the over-collected revenue or bill the under-collected revenue.

Recovery through rates resulted in amortization of regulatory assets of approximately $1.6 million and $6.4 million for the years 
ended December 31, 2015 and 2014, respectively.  Amortization of regulatory assets of approximately $32.0 million for the year 
ended December 31, 2013, included amounts recovered through rates totaling $21.8 million and $10.2 million related to certain 
transition costs as described above.

We collect, through our rates, the estimated costs of removal on certain regulated properties through depreciation expense, with 
a corresponding credit to accumulated depreciation and amortization.  These removal costs are nonlegal obligations; however, 
the amounts collected that are in excess of these nonlegal asset-removal costs incurred are accounted for as a regulatory 
liability.  We have made an estimate of our regulatory liability using current rates since the last general rate order in each of our 
jurisdictions.  We record the estimated nonlegal asset removal obligation in noncurrent liabilities in other deferred credits on 
our Balance Sheets.

In January 2016, as a result of our rate case in Oklahoma, we recorded a regulatory asset of $2.4 million to recover certain 
information technology costs incurred as a result of our separation from ONEOK in 2014, which will be recovered over four 
years.

10. 

PROPERTY, PLANT AND EQUIPMENT

The following table sets forth our property, plant and equipment by property type, for the periods indicated:

December 31, December 31,

Natural gas distribution pipelines and related equipment
Natural gas transmission pipelines and related equipment
General plant and other
Construction work in process
Property, plant and equipment
Accumulated depreciation and amortization
Net property, plant and equipment

$

$

$

2015
2014
(Thousands of dollars)
4,114,090
462,654
498,906
57,032
5,132,682
(1,620,771)
3,511,911

3,909,881
450,810
418,157
71,353
4,850,201
(1,556,481)
3,293,720

$

We compute depreciation expense for distribution operations by applying composite, straight-line rates approved by various 
regulatory authorities.  The average depreciation rates for our property are set forth in the following table for the periods 
indicated:

2015
2.0% - 3.0%

Years Ended December 31,
2014
2.0% - 3.0%

2013
2.0% - 3.0%

We recorded capitalized interest of $2.6 million, $2.5 million and $1.3 million for the years ended December 31, 2015, 2014 
and 2013, respectively.  We incurred liabilities for construction work in process that had not been paid at December 31, 2015, 
2014 and 2013 of $15.0 million, $7.0 million and $10.5 million, respectively.  Such amounts are not included in capital 
expenditures on the Statements of Cash Flows.

Amounts recorded for regulatory accounting purposes that were not reflected in our financial statements were not material for 
the years ended December 31, 2015 and 2014. 

67

11. 

SHARE-BASED PAYMENTS

The ONE Gas Equity Compensation Plan (ECP or ONE Gas Plan) provides for the granting of stock-based compensation, 
including incentive stock options, nonstatutory stock options, stock bonus awards, restricted stock awards, restricted stock unit 
awards, performance stock awards and performance unit awards to eligible employees and the granting of stock awards to 
nonemployee directors.  We have reserved 2.8 million shares of common stock for issuance under the ECP.  At December 31, 
2015, we had approximately 1.4 million shares available for issuance under the ECP, which reflect shares issued and estimated 
shares expected to be issued upon vesting of outstanding awards granted under the plan, less forfeitures.  The plan allows for 
the deferral of awards granted in stock or cash, in accordance with Internal Revenue Code section 409A requirements.

Prior to our separation, certain employees assigned to us in the separation participated in ONEOK’s share-based awards plans 
(ONEOK Plans).  The ONEOK Plans provided for ONEOK common stock based awards to both employees and ONEOK’s 
nonemployee directors.  The plans permitted the granting of various types of awards including, but not limited to, performance 
stock units and restricted stock units.  Awards could be granted for no consideration other than prior and future services or 
based on certain financial performance targets.  In connection with the separation, awards granted by ONEOK in 2012 and 
2013 were cancelled and replaced with awards of ONE Gas shares.  The number of restricted stock units held by a ONE Gas 
participant was multiplied by a ratio of 2.04 which was determined by the ONEOK volume-weighted average share price of 
$68.22 on January 31, 2014, and the ONE Gas volume-weighted average share price of $33.50 on February 3, 2014, rounded to 
the nearest whole share.

The same ratio of 2.04 was used to convert the outstanding performance stock units awarded by ONEOK prior to the separation 
into awards for ONE Gas shares.  A pre-distribution payout factor was applied to each grant based on ONEOK’s total 
shareholder return performance compared with its peer group for the number of days lapsed from the date of the grant to 
January 31, 2014, and these awards were frozen or “banked” and are not subject to an additional payout factor.  The remaining 
units from each grant will continue to be at-risk based on our performance and the relative total shareholder return of our peer 
group.

No incremental cost was recorded in our financial statements upon cancellation and replacement of the 2012 and 2013 
restricted stock units and performance stock units because the previous awards were cancelled and replaced pursuant to anti-
dilution provisions of the ONEOK Plans and the fair value of the awards immediately following the cancellation and 
replacement was not higher than the fair value of the awards immediately before the cancellation and replacement.

We were charged by ONEOK for share-based compensation expense related to employees that directly supported our 
operations.  ONEOK also charged us for the allocated costs of certain employees of ONEOK (including stock-based 
compensation) who provided general and administrative services on our behalf.  Information included in this note is limited to 
share-based compensation associated with employees in 2014, and employees that directly supported our operations as part of 
ONEOK prior to our separation.  See Note 2 for total costs charged to us by ONEOK.

Compensation cost expensed for our share-based payment plans was $5.7 million, net of tax benefits of $3.5 million, for 2015, 
and $7.0 million, net of tax benefits of $4.4 million for 2014.  Compensation cost charged to us for employees directly 
supporting our operations by ONEOK for 2013 totaled $9.7 million, respectively, which is net of $6.1 million of tax benefits. 

Restricted Stock Unit Awards - We have granted restricted stock unit awards to key employees that vest over a service period 
of generally three years and entitle the grantee to receive shares of our common stock.  The awards granted that replaced 
awards granted by ONEOK in 2012 vested, and 2013 will vest, consistent with their original vesting dates in 2015 and 2016, 
respectively.  Restricted stock unit awards granted in 2015 and 2014 and that replaced awards granted by ONEOK in 2013 
accrue dividend equivalents in the form of additional restricted stock units prior to vesting.  Restricted stock unit awards are 
measured at fair value as if they were vested and issued on the grant date, reduced by expected dividend payments for awards 
that do not accrue dividends and adjusted for estimated forfeitures.  Compensation expense is recognized on a straight-line 
basis over the vesting period of the award.  A forfeiture rate of 3 percent per year based on historical forfeitures under our 
share-based payment plans is used.

Performance Stock Unit Awards - We have granted performance stock unit awards to key employees.  The shares of common 
stock underlying the performance stock units vest at the expiration of a service period of generally three years if certain 
performance criteria are met by us as determined by the Executive Compensation Committee of the Board of Directors.  The 
awards granted that replaced awards granted by ONEOK in 2012 vested, and 2013 will vest, consistent with their original 
vesting dates in 2015 and 2016, respectively, if certain performance criteria are met by us for the at-risk portion of the awards 
as described above.  Upon vesting, a holder of performance stock units is entitled to receive a number of shares of common 

68

stock equal to a percentage (0 percent to 200 percent) of the performance stock units granted, based on our total shareholder 
return over the vesting period, compared with the total shareholder return of a peer group of other utilities over the same period.

If paid, the outstanding performance stock unit awards entitle the grantee to receive shares of our common stock.  The 
outstanding performance stock unit awards are equity awards with a market-based condition, which results in the compensation 
expense for these awards being recognized on a straight-line basis over the requisite service period, provided that the requisite 
service period is fulfilled, regardless of when, if ever, the market condition is satisfied.  The new performance stock unit awards 
granted in 2015 and 2014 and the grants that replaced awards granted by ONEOK in 2013 accrue dividend equivalents in the 
form of additional performance stock units prior to vesting.  The fair value of these performance stock units was estimated on 
the grant date based on a Monte Carlo model.  The compensation expense on these awards will only be adjusted for changes in 
forfeitures.  A forfeiture rate of 3 percent per year based on historical forfeitures under our and, prior to the separation, 
ONEOK’s share-based payment plans was used. 

Restricted Stock Unit Award Activity

As of December 31, 2015, there was $3.2 million of total unrecognized compensation costs related to the nonvested restricted 
stock unit awards, which is expected to be recognized over a weighted-average period of 1.8 years.  The following tables set 
forth activity and various statistics for restricted stock unit awards outstanding under the respective plans for the period 
indicated:

Nonvested December 31, 2014

Granted
Vested
Forfeited

Nonvested December 31, 2015

Weighted-average grant date fair value (per share)
Fair value of shares granted (thousands of dollars)

Performance Stock Unit Award Activity

Number of
Shares

Weighted-
Average Price

$
325,730
$
75,880
(162,280) $
(8,072) $
$

231,258

2015

2014

2013

$
$

41.40
3,141

$
$

33.19
3,149

$
$

23.47
41.40
18.32
34.42
32.59

47.36
1,323

As of December 31, 2015, there was $4.7 million of total unrecognized compensation cost related to the nonvested 
performance stock unit awards, which is expected to be recognized over a weighted-average period of 1.7 years.  The following 
tables set forth activity and various statistics related to our performance stock unit awards and the assumptions used by us, and 
ONEOK prior to 2014, in the valuations of the 2015, 2014 and 2013 grants at the grant date:

Nonvested December 31, 2014

Granted
Vested
Forfeited

Nonvested December 31, 2015

Volatility
Dividend yield
Risk-free interest rate

Number of
Units

Weighted-
Average Price

$
847,951
100,860
$
(502,474) $
(7,087) $
$

439,250

2015

15.90% (a)
2.90%
1.10%

2014
18.40%
3.37%
0.67%

(a)

2013
22.27%
3.04%
0.42%

17.62
44.48
14.33
30.22
27.35

(b)

(a) - Volatility based on historical volatility over three years using daily stock price observations of our peer utilities.

(b) - Volatility based on historical volatility over three years using daily ONEOK stock price observations.

69

 
Weighted-average grant date fair value (per share)
Fair value of shares granted (thousands of dollars)

Employee Stock Purchase Plan

2015

2014

2013

$
$

44.48
4,486

$
$

35.98
4,462

$
$

52.30
2,926

We have reserved a total of 0.7 million shares of common stock for issuance under our Employee Stock Purchase Plan (the 
ESPP).  Subject to certain exclusions, all employees who work at least 20 hours per week are eligible to participate in the ESPP.  
Employees can choose to have up to 10 percent of their annual base pay withheld to purchase our common stock, subject to 
terms and limitations of the plan.  The purchase price of the stock is 85 percent of the lower of the average market price of our 
common stock on the grant date or exercise date.  Approximately 40 percent and 36 percent of employees participated in the 
plan in 2015 and 2014, respectively, and purchased 51,092 shares at $36.15 in 2015 and 51,418 shares at $32.29 in 2014.  
Compensation expense, before taxes, was $1.3 million  and $0.4 million in 2015 and 2014, respectively.  All eligible employees 
of ONEOK were eligible to participate in a similar ESPP plan, but enrollment of our employees in that plan was terminated 
upon the separation.  Compensation expense, before tax, charged to us by ONEOK for employees who directly supported our 
operations was $2.7 million for 2013.

Employee Stock Award Program

Under the program, each time the per-share closing price of our common stock on the NYSE closed for the first time at or 
above each $1.00 increment above its previous historical high closing price, we issued, for no monetary consideration, one 
share of our common stock to all eligible employees.  The total number of shares of our common stock authorized for issuance 
under this program is 125,000.  Shares issued to employees under this program during 2015 and 2014 totaled 23,506 and 
35,324, and compensation expense, before taxes, related to the Employee Stock Award Program was $1.1 million and $2.5 
million for 2015 and 2014, respectively.  Compensation expense, before taxes, charged to us by ONEOK related to a similar 
program to ours that was administered by ONEOK for employees who directly supported our operations was $4.2 million for 
2013.

12. 

EMPLOYEE BENEFIT PLANS

Retirement and Other Postemployment Benefit Plans

Prior to separation, certain employees participated in the Plans sponsored by ONEOK.  We accounted for the Plans as 
multiemployer benefit plans. These defined benefit pension and other postemployment benefit costs included amounts 
associated with vested participants who are no longer employees.  As described in Note 2, prior to 2014, ONEOK also charged 
us for the allocated cost of certain employees of ONEOK who provided general and administrative services on our behalf.  
ONEOK included an allocation of the benefit costs associated with these ONEOK employees based upon its allocation 
methodology, not necessarily specific to the employees providing general and administrative services on our behalf. 

Retirement Plans - We have a defined benefit pension plan covering nonbargaining-unit employees hired before January 1, 
2005, and certain bargaining-unit employees hired before December 15, 2011.  Nonbargaining unit employees hired after 
December 31, 2004; employees represented by Local No. 304 of the International Brotherhood of Electrical Workers (IBEW) 
hired on or after July 1, 2010; employees represented by the United Steelworkers hired on or after December 15, 2011; and 
employees who accepted a one-time opportunity to opt out of the defined benefit pension plan are covered by a profit-sharing 
plan.  Certain employees of the Texas Gas Services division were entitled to benefits under a frozen cash-balance pension plan.  
In addition, we have a supplemental executive retirement plan for the benefit of certain officers.  No new participants in the 
supplemental executive retirement plan have been approved since 2005, and it was formally closed to new participants as of 
January 1, 2014.  We fund our defined benefit pension costs at a level needed to maintain or exceed the minimum funding 
levels required by the Employee Retirement Income Security Act of 1974, as amended, and the Pension Protection Act of 2006.  
Pension expense was $38.0 million and $27.1 million in 2015 and 2014, respectively, prior to regulatory deferrals.  Pension 
expense charged to us by ONEOK for employees directly supporting our operations totaled $35.0 million for 2013, prior to 
regulatory deferrals.

Other Postemployment Benefit Plans - We sponsor health and welfare plans that provide postemployment medical and life 
insurance benefits to certain employees who retire with at least five years of service.  The postemployment medical plan is 
contributory based on hire date, age and years of service, with retiree contributions adjusted periodically, and contains other 
cost-sharing features such as deductibles and coinsurance.  Other postemployment benefit expense was $5.0 million and $5.9 

70

million in 2015 and 2014, respectively, prior to regulatory deferrals.  Other postemployment benefit expense charged to us by 
ONEOK for employees directly supporting our operations totaled $12.3 million for 2013, prior to regulatory deferrals.

Plan Amendments - In October 2015, plan amendments were approved to merge our frozen cash-balance defined benefit 
pension plan covering certain Texas Gas Service employees with our defined benefit pension plan covering certain eligible 
employees.  In addition, we announced to eligible pre-65 participants in our postemployment medical plans a change from a 
self-insured postemployment medical plan to a plan providing participants an annual benefit that will allow them to select 
coverage on a healthcare exchange.  As a result, we remeasured the respective plan assets and benefit obligations, effective 
October 1, 2015, which resulted in a reduction in benefit obligations of our postemployment benefit plan of $11.9 million.  Net 
periodic benefit cost for the plans in 2015 was reduced by $3.4 million.  

Actuarial Assumptions - The following table sets forth the weighted-average assumptions used to determine benefit 
obligations for pension and postemployment benefits for the periods indicated:

Discount rate
Compensation increase rate

December 31,

2015
4.75%
3.35% - 3.40%

2014
4.25%
3.30% - 3.50%

The following table sets forth the weighted-average assumptions used by us, and ONEOK prior to 2014, to determine the 
periodic benefit costs for the periods indicated:

Discount rate - pension plans
Discount rate - other postemployment plans
Expected long-term return on plan assets
Compensation increase rate

Nine Months Ended
September 30,
2015
4.25%
4.25%
7.75%
3.30% - 3.50%

Three Months Ended
December 31,
2015
4.75%
4.75%
7.75%
3.30% - 3.50%

Years Ended December 31,

2014
5.25%
5.00%
7.75%

2013
4.25%
4.00%
8.25%

3.35% - 3.50% 3.45% - 3.50%

We determine our overall expected long-term rate of return on plan assets, based on our review of historical returns and 
economic growth models.  At December 31, 2014, we updated our assumed mortality rates to incorporate the new set of 
mortality tables issued by the Society of Actuaries in October 2014.

We determine our discount rates annually.  We estimate our discount rate based upon a comparison of the expected cash flows 
associated with our future payments under our defined benefit pension and other postemployment obligations to a hypothetical 
bond portfolio created using high-quality bonds that closely match expected cash flows.  Bond portfolios are developed by 
selecting a bond for each of the next 60 years based on the maturity dates of the bonds.  Bonds selected to be included in the 
portfolios are only those rated by Moody’s as AA- or better and exclude callable bonds, bonds with less than a minimum issue 
size, yield outliers and other filtering criteria to remove unsuitable bonds.

Regulatory Treatment - The OCC, KCC and regulatory authorities in Texas have approved the recovery of pension costs and 
other postemployment benefits costs through rates for Oklahoma Natural Gas, Kansas Gas Service and Texas Gas Service, 
respectively.  The costs recovered through rates are based on current funding requirements and the net periodic benefit cost for 
defined benefit pension and other postemployment costs.  Differences, if any, between the expense and the amount recovered 
through rates would be reflected in earnings, net of authorized deferrals.

We historically have recovered defined benefit pension and other postemployment benefit costs through rates.  We believe it is 
probable that regulators will continue to include the net periodic pension and other postemployment benefit costs in our cost of 
service.

71

 
 
Obligations and Funded Status - In connection with the separation from ONEOK, we entered into an Employee Matters 
Agreement with ONEOK, which provides that our employees no longer participate in benefit plans sponsored or maintained by 
ONEOK as of the separation date.  Effective January 1, 2014, the ONEOK defined benefit pension plans and other 
postemployment benefit plans transferred assets and obligations related to those employees transferring to ONE Gas and vested 
participants who are no longer employees to the new ONE Gas plans.  As a result, we recorded sponsored pension and other 
postemployment plan obligations of approximately $1.1 billion, and sponsored defined benefit pension and other 
postemployment plan assets of approximately $1.0 billion, which are reflected below as our balances at the beginning of the 
period.  Additionally, as a result of the transfer of unrecognized losses from ONEOK, our regulatory assets and deferred income 
taxes increased $331 million and $86 million, respectively.

The following table sets forth our defined benefit pension and other postemployment benefit plans, benefit obligations and fair 
value of plan assets for the periods indicated:

   Benefit obligation, end of period

985,624

1,028,171

Changes in Benefit Obligation

Benefit obligation, beginning of period

Service cost

Interest cost

Plan participants’ contributions

Actuarial loss (gain)

Benefits paid

Plan amendment

Change in Plan Assets

Fair value of plan assets, beginning of period

Actual return on plan assets

Employer contributions

Plan participants’ contributions

Benefits paid

   Fair value of assets, end of period

   Balance at December 31

Current liabilities

Noncurrent liabilities

   Balance at December 31

Pension Benefits

Other Postemployment Benefits

December 31,

December 31,

2015

2014

2015

2014

(Thousands of dollars)

$

1,028,171

$

863,620

$

257,688

$

239,171

13,660

43,542

—

(47,607)

(52,142)

—

11,620

43,791

—

159,275

(50,135)

—

845,396

(9,026)

933

—

(52,142)

785,161

840,699

53,907

925

—

(50,135)

845,396

3,257

10,628

2,915

(19,702)

(14,632)

(11,901)

228,253

151,777

1,335

14,100

2,915

(14,632)

155,495

3,468

11,605

2,642

14,998

(14,196)

—

257,688

147,237

6,912

9,182

2,642

(14,196)

151,777

$

$

$

(200,463) $

(182,775) $

(72,758) $

(105,911)

(912) $

(907) $

— $

—

(199,551)

(181,868)

(72,758)

(200,463) $

(182,775) $

(72,758) $

(105,911)

(105,911)

The accumulated benefit obligation for our defined benefit pension plans was $934.3 million and $970.7 million at December 
31, 2015 and 2014, respectively.

There are no plan assets expected to be withdrawn and returned to us in 2016.

72

Components of Net Periodic Benefit Cost - The following table sets forth the components of net periodic benefit cost for our 
defined benefit pension and other postemployment benefit plans for the period indicated:

Components of net periodic benefit cost

Service cost

Interest cost

Expected return on assets

Amortization of unrecognized prior service cost

Amortization of net loss

Settlements

   Net periodic benefit cost

Components of net periodic benefit cost

Service cost

Interest cost

Expected return on assets

Amortization of unrecognized prior service cost

Amortization of net loss

   Net periodic benefit cost

Pension Benefits

Year Ended December 31,

2015

2014

(Thousands of dollars)

13,660

$

43,542

(61,769)

266

42,226

27

37,952

$

Other Postemployment Benefits

Year Ended December 31,

2015

2014

(Thousands of dollars)

3,257

$

10,628

(11,892)

(2,228)

5,268

5,033

$

11,620

43,791

(59,862)

549

30,200

773

27,071

3,468

11,605

(11,393)

(1,760)

3,969

5,889

$

$

$

$

Other Comprehensive Income (Loss) - The following table sets forth the amounts recognized in other comprehensive income 
(loss) related to our defined benefit pension benefits for the period indicated:

Pension Benefits

Year Ended December 31,

2015

2014

(Thousands of dollars)

Net gain (loss) arising during the period

Amortization of loss

Deferred income taxes

   Total recognized in other comprehensive income (loss)

$

$

$

339

917

(483)

773

$

(3,543)

518

1,244

(1,781)

There were no amounts recognized in other comprehensive income (loss) related to our other postemployment benefits for the 
periods presented.

73

The tables below sets forth the amounts in accumulated other comprehensive income (loss) that had not yet been recognized as 
components of net periodic benefit expense for the periods indicated:

Prior service credit (cost)

Accumulated loss

Accumulated other comprehensive loss 
  before regulatory assets

Regulatory asset for regulated entities

Accumulated other comprehensive loss
  after regulatory assets

Deferred income taxes

Accumulated other comprehensive loss,
  net of tax

Prior service credit (cost)

Accumulated loss

Accumulated other comprehensive loss 
  before regulatory assets

Regulatory asset for regulated entities

Accumulated other comprehensive loss
  after regulatory assets

Deferred income taxes

Accumulated other comprehensive loss,
  net of tax

Pension Benefits

December 31,

2015

2014

(Thousands of dollars)

— $

(407,798)

(407,798)

400,625

(7,173)

2,772

(4,401) $

Other Postemployment Benefits

December 31,

2015

2014

(Thousands of dollars)

14,010

$

(50,447)

(36,437)

36,437

—

—

— $

(266)

(426,862)

(427,128)

418,699

(8,429)

3,255

(5,174)

4,337

(64,861)

(60,524)

60,524

—

—

—

$

$

$

$

The following tables set forth the amounts recognized in either accumulated comprehensive income (loss) or regulatory assets 
expected to be recognized as components of net periodic benefit expense in the next fiscal year:

Amounts to be recognized in 2016

(Thousands of dollars)

Prior service credit (cost)

Actuarial net loss

$

$

— $

35,542

$

(3,633)

4,608

Pension Benefits

Other Postemployment
Benefits

Health Care Cost Trend Rates - The following table sets forth the assumed health care cost-trend rates for the periods 
indicated:

Health care cost-trend rate assumed for next year

4.00% - 7.50%

4.00% - 7.75%

Rate to which the cost-trend rate is assumed to decline
  (the ultimate trend rate)

4.00% - 5.00%

4.00% - 5.00%

Year that the rate reaches the ultimate trend rate

2022

2022

2015

2014

74

Assumed health care cost-trend rates have a significant effect on the amounts reported for our health care plans.  A one 
percentage point change in assumed health care cost-trend rates would have the following effects:

Effect on total of service and interest cost

Effect on other postemployment benefit obligation

One Percentage

One Percentage

Point Increase

Point Decrease

(Thousands of dollars)

$

$

263

3,655

$

$

(266)

(3,752)

Plan Assets - Our investment strategy is to invest plan assets in accordance with sound investment practices that emphasize 
long-term fundamentals.  The goal of this strategy is to maximize investment returns while managing risk in order to meet the 
plan’s current and projected financial obligations.  To achieve this strategy, we have established a liability-driven investment 
strategy to change the allocations as the plan reaches certain funded status.  The plan’s investments include a diverse blend of 
various domestic and international equities, investment-grade debt securities which mirror the cash flows of our liability, 
insurance contracts and alternative investments.  The current target allocation for the assets of our defined benefit pension plan 
is as follows:

U.S. large-cap equities

Investment-grade bonds

Developed foreign large-cap equities

Alternative investments

Mid-cap equities

Emerging markets equities

Small-cap equities

  Total

37.4%

30.0%

10.6%

7.7%

5.6%

5.0%

3.7%

100%

As part of our risk management for the plans, minimums and maximums have been set for each of the asset classes listed 
above.  All investment managers for the plan are subject to certain restrictions on the securities they purchase and, with the 
exception of indexing purposes, are prohibited from owning our stock.

The following tables set forth our pension benefits and other postemployment benefits plan assets by fair value category as of 
the measurement date:

Pension Benefits

December 31, 2015

Asset Category

Level 1

Level 2

Level 3

Total

(Thousands of dollars)

Investments:

Equity securities (a)

Government obligations

Corporate obligations (b)

Cash and money market funds (c)

Insurance contracts and group annuity contracts

Other investments (d)

  Total assets

$

405,935 $

62,150 $

— $

—

—

5,429

—

2,884

44,651

139,396

10,279

—

—

—

—

—

56,465

57,972

468,085

44,651

139,396

15,708

56,465

60,856

$

414,248 $

256,476 $

114,437 $

785,161

(a) - This category represents securities of the various market sectors from diverse industries.
(b) - This category represents bonds from diverse industries.
(c) - This category is primarily money market funds.
(d) - This category represents alternative investments such as hedge funds and other financial instruments.

75

Pension Benefits

December 31, 2014

Asset Category

Level 1

Level 2

Level 3

Total

(Thousands of dollars)

Investments:

Equity securities (a)

Government obligations

Corporate obligations (b)

Cash and money market funds (c)

Insurance contracts and group annuity contracts

Other investments (d)

  Total assets

$

439,165 $

66,766 $

— $

—

—

4,152

—

—

47,769

153,412

16,341

—

—

—

—

—

59,877

57,914

505,931

47,769

153,412

20,493

59,877

57,914

$

443,317 $

284,288 $

117,791 $

845,396

 (a) - This category represents securities of the various market sectors from diverse industries.
 (b) - This category represents bonds from diverse industries.
 (c) - This category is primarily money market funds.
 (d) - This category represents alternative investments such as hedge funds.

Other Postemployment Benefits

December 31, 2015

Asset Category

Level 1

Level 2

Level 3

Total

(Thousands of dollars)

Investments:

Equity securities (a)

Government obligations

Corporate obligations (b)

Cash and money market funds (c)

Insurance contracts and group annuity contracts

Other investments (d)

  Total assets

$

54,560 $

7,498 $

— $

62,058

—

—

233

—

4

64

200

13,322

79,531

—

—

—

—

—

83

64

200

13,555

79,531

87

$

54,797 $

100,615 $

83 $

155,495

 (a) - This category represents securities of the various market sectors from diverse industries.
 (b) - This category represents bonds from diverse industries.
 (c) - This category is primarily money market funds.
 (d) - This category represents alternative investments such as hedge funds.

76

Other Postemployment Benefits

December 31, 2014

Asset Category

Level 1

Level 2

Level 3

Total

(Thousands of dollars)

Investments:

Equity securities (a)

Government obligations

Corporate obligations (b)

Cash and money market funds (c)

Insurance contracts and group annuity contracts

Other investments (d)

  Total assets

$

49,553 $

12,589 $

— $

62,142

—

—

964

—

—

78

251

5,894

82,353

—

—

—

—

—

95

78

251

6,858

82,353

95

$

50,517 $

101,165 $

95 $

151,777

 (a) - This category represents securities of the various market sectors from diverse industries.
 (b) - This category represents bonds from diverse industries.
 (c) - This category is primarily money market funds.
 (d) - This category represents alternative investments such as hedge funds.

The following table sets forth the reconciliation of Level 3 fair value measurements of our pension plans for the periods 
indicated:

January 1, 2014

Net realized and unrealized gains (losses)

Settlements

December 31, 2014

Net realized and unrealized gains

Settlements

December 31, 2015

Pension Benefits

Insurance
Contracts

Other
Investments

Total

(Thousands of dollars)

63,454

$

73,590

$

3,446

(7,023)

(15,676)

—

59,877

$

57,914

$

2,188

(5,600)

58

—

137,044

(12,230)

(7,023)

117,791

2,246

(5,600)

56,465

$

57,972

$

114,437

$

$

$

Contributions - During 2015, we contributed $0.9 million to our defined benefit pension plans and we contributed $14.1 
million to our other postemployment benefit plans. In 2016, we expect to contribute $0.9 million to our defined benefit pension 
plans and expect to contribute $5.8 million to our other postemployment benefit plans.

77

Pension and Other Postemployment Benefit Payments - Benefit payments for our defined benefit pension and other 
postemployment benefit plans for the period ended December 31, 2015 were $52.1 million and $14.6 million, respectively.  
The following table sets forth the pension benefits and other postemployment benefits payments expected to be paid in 
2016-2025:

Benefits to be paid in:

(Thousands of dollars)

Pension
Benefits

Other Postemployment
Benefits

2016

2017

2018

2019

2020

2021 through 2025

$

$

$

$

$

$

53,359

54,710

56,201

57,238

58,901

311,194

$

$

$

$

$

$

14,116

13,875

14,435

14,956

15,406

81,175

The expected benefits to be paid are based on the same assumptions used to measure our benefit obligation at December 31, 
2015, and include estimated future employee service.

Other Employee Benefit Plans

401(k) Plan - We have a 401(k) Plan which covers all full-time employees, and employee contributions are discretionary.  We 
match 100 percent of each participant’s eligible contribution up to 6 percent of each participant’s eligible compensation, subject 
to certain limits.  Our contributions made to the plan were $10.2 million and $9.7 million 2015 and 2014, respectively.  Prior to 
our separation, ONEOK maintained a similar 401(k) Plan and compensation expense charged to us for employees who directly 
supported our operations by ONEOK totaled $8.3 million in 2013 for ONEOK’s matching contributions to this plan.

Profit-Sharing Plan - We have a profit-sharing plan for all employees that do not participate in our defined benefit pension 
plan.  We plan to make a contribution to the profit-sharing plan each quarter equal to 1 percent of each participant’s eligible 
compensation during the quarter.  Additional discretionary employer contributions may be made at the end of each year.  
Employee contributions are not allowed under the plan.  Our contributions made to the plan were $6.5 million and $4.0 million 
in 2015 and 2014, respectively.  ONEOK maintained a similar Profit-Sharing Plan and compensation expense associated with 
ONEOK’s contributions made to the plan for employees who directly supported our operations prior to the separation were  
$1.6 million in 2013.

Employee Deferred Compensation Plan - Our Nonqualified Deferred Compensation Plan provides select employees with the 
option to defer portions of their compensation and provides nonqualified deferred compensation benefits that are not available 
due to limitations on employer and employee contributions to qualified defined contribution plans under the federal tax laws.  
Contributions made to the plan were not material in 2015 and 2014.  ONEOK maintained a similar plan and contributions made 
to the plan for employees who directly supported our operations prior to the separation were not material in 2013.

78

13. 

INCOME TAXES

The following table sets forth our provision for income taxes for the periods indicated:

Current income tax provision

Federal
State

Total current income tax provision

Deferred income tax provision

Federal
State

Total deferred income tax provision

Total provision for income taxes

2015

Years Ended December 31,
2014
(Thousands of dollars)

2013

$

$

7,135
2,055
9,190

56,440
7,349
63,789
72,979

$

$

17,006
1,397
18,403

42,024
7,911
49,935
68,338

$

$

—
67
67

53,562
8,643
62,205
62,272

The following table is a reconciliation of our income tax provision for the periods indicated:

Income before income taxes
Federal statutory income tax rate
Provision for federal income taxes
State income taxes, net of federal tax benefit
Other, net

Total provision for income taxes

$

$

Years Ended December 31,
2014
(Thousands of dollars)
$

178,128

$

2015

192,009

35%

35%

67,203
6,114
(338)
72,979

$

62,345
6,051
(58)
68,338

$

2013

161,467

35%

56,513
5,661
98
62,272

Prior to  our separation from ONEOK, our operations were included in the consolidated federal and state income tax returns of 
ONEOK.  Our income tax provision was calculated on a separate return basis.  Accordingly, we recognized deferred tax assets 
and liabilities for the difference between the financial statement and income tax basis of assets and liabilities and carry-forward 
items, based on income tax laws and rates existing at the time the temporary differences are expected to reverse as if we had 
been a corporation for federal and state income tax purposes.  In addition, ONEOK managed its tax position based upon the tax 
attributes of the consolidated group.  Certain attributes may not be available to use if we had been operating as an independent 
company.  

The following table sets forth the tax effects of temporary differences that gave rise to significant portions of the deferred tax 
assets and liabilities for the periods indicated:

Deferred tax assets

Employee benefits and other accrued liabilities
Net operating loss
Other

Total deferred tax assets

Deferred tax liabilities

Excess of tax over book depreciation
Purchased-gas cost adjustment
Other regulatory assets and liabilities, net

Total deferred tax liabilities

Net deferred tax liabilities

79

December 31,

2015
2014
(Thousands of dollars)

$

$

110,148
—
7,848
117,996

897,667
3,999
168,115
1,069,781
951,785

$

$

128,715
8,144
5,655
142,514

820,853
16,177
193,159
1,030,189
887,675

At December 31, 2015 and 2014, we had income taxes receivable of $38.9 million and $43.8 million, respectively.

Prior to our separation from ONEOK, we were included in the ONEOK income tax returns for all applicable years.  We file 
income tax returns in the United States federal jurisdiction as well as in the states where we have operations.  In 2015, we filed 
our initial United States consolidated federal tax return for the period February 1, 2014 through December 31, 2014.

We have adopted ASU 2015-17, “Balance Sheet Classification of Deferred Taxes,” early to simplify our financial reporting 
process and have applied it prospectively for the period beginning October 1, 2015.  Prior periods were not retrospectively 
adjusted.

14. 

COMMITMENTS AND CONTINGENCIES

Commitments - Operating leases represent future minimum lease payments under noncancelable leases covering office space, 
facilities and information technology hardware and software.  Rental expense was $5.0 million in each of 2015 and 2014 and 
$4.8 million in 2013.  The following table sets forth our operating lease payments for the periods indicated:

Operating Leases
(Millions of dollars)

2016
2017
2018
2019
2020
Thereafter
Total

$

$

4.6
4.5
4.2
3.5
3.3
7.0
27.1

Environmental Matters - We are subject to multiple historical, wildlife preservation and environmental laws and/or 
regulations, which affect many aspects of our present and future operations.  Regulated activities include, but are not limited to, 
those involving air emissions, storm water and wastewater discharges, handling and disposal of solid and hazardous wastes, 
wetland preservation, hazardous materials transportation, and pipeline and facility construction.  These laws and regulations 
require us to obtain and/or comply with a wide variety of environmental clearances, registrations, licenses, permits and other 
approvals.  Failure to comply with these laws, regulations, licenses and permits may expose us to fines, penalties and/or 
interruptions in our operations that could be material to our results of operations.  In addition, emission controls and/or other 
regulatory or permitting mandates under the Clean Air Act and other similar federal and state laws could require unexpected 
capital expenditures.  We cannot assure that existing environmental statutes and regulations will not be revised or that new 
regulations will not be adopted or become applicable to us.  Revised or additional statutes or regulations that result in increased 
compliance costs or additional operating restrictions could have a material adverse effect on our business, financial condition, 
results of operations and cash flows.

We own or retain legal responsibility for the environmental conditions at 12 former manufactured natural gas sites in Kansas.  
These sites contain potentially harmful materials that are subject to control or remediation under various environmental laws 
and regulations.  A consent agreement with the KDHE governs all work at these sites.  The terms of the consent agreement 
allow us to investigate these sites and set remediation activities based upon the results of the investigations and risk analysis.  
Remediation involves typically the management of contaminated soils and may involve removal of structures and monitoring 
and/or remediation of groundwater.

We have completed or addressed removal of the source of soil contamination at 11 of the 12 sites according to plans approved 
by KDHE.  Regulatory closure has been achieved at three of the sites.  We have begun site assessment at the remaining site 
where no active remediation has occurred.

Our expenditures for environmental evaluation, mitigation, remediation and compliance to date have not been significant in 
relation to our financial position, results of operations or cash flows, and our expenditures related to environmental matters had 
no material effects on earnings or cash flows during 2015, 2014 and 2013. A number of environmental issues may exist with 
respect to manufactured gas plants.  With the trend toward stricter standards, greater regulation and more extensive permit 
requirements for the types of assets operated by us that are subject to environmental regulation, our environmental expenditures 
could increase in the future, and such expenditures may not be fully covered by insurance or recoverable in rates from our 
customers, and those costs may adversely affect our financial condition, results of operations and cash flows.

80

Pipeline Safety - We are subject to PHMSA regulations, including integrity-management regulations.  PHMSA regulations 
require pipeline companies operating high-pressure transmission pipelines to perform integrity assessments on pipeline 
segments that pass through densely populated areas or near specifically designated high-consequence areas.  In January 2012, 
the Pipeline Safety, Regulatory Certainty and Job Creation Act was signed into law.  The law increased maximum penalties for 
violating federal pipeline safety regulations and directs the DOT and Secretary of Transportation to conduct further review or 
studies on issues that may or may not be material to us.  These issues include but are not limited to the following:

• 

• 

• 

an evaluation of whether natural gas pipeline integrity-management requirements should be expanded beyond current 
high-consequence areas;
a verification of records for pipelines in class 3 and 4 locations and high-consequence areas to confirm maximum allowable 
operating pressures; and
a requirement to test previously untested pipelines operating above 30 percent yield strength in high-consequence 
areas.

The potential capital and operating expenditures related to this legislation, the associated regulations or other new pipeline 
safety regulations are unknown.

Legal Proceedings - We are a party to various litigation matters and claims that have arisen in the normal course of our 
operations.  While the results of litigation and claims cannot be predicted with certainty, we believe the reasonably possible 
losses from such matters, individually and in the aggregate, are not material.  Additionally, we believe the probable final 
outcome of such matters will not have a material adverse effect on our results of operations, financial position or cash flows.

15. 

QUARTERLY FINANCIAL DATA (UNAUDITED)

Year Ended December 31, 2015

Revenues
Net margin
Operating income
Net income
Earnings per share
   Basic
   Diluted

Year Ended December 31, 2014

Revenues
Net margin
Operating income
Net income
Earnings per share
   Basic
   Diluted

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

$
$
$
$

$
$

$
$
$
$

$
$

676,531
262,978
109,005
60,381

1.15
1.13

First
Quarter

766,178
259,836
109,353
59,076

1.13
1.13

$
$
$
$

$
$

$
$
$
$

$
$

(Thousands of dollars)

256,786
176,837
31,270
12,076

0.23
0.23

$
$
$
$

$
$

225,226
170,502
24,951
7,371

0.14
0.14

Second
Quarter

Third
Quarter

(Thousands of dollars)

296,838
176,493
26,812
9,454

0.18
0.18

$
$
$
$

$
$

241,522
166,452
19,119
4,653

0.09
0.09

$
$
$
$

$
$

$
$
$
$

$
$

389,149
231,416
73,903
39,202

0.75
0.74

Fourth
Quarter

514,368
224,176
70,010
36,607

0.70
0.69

81

 
 
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE

ITEM 9. 

None.

ITEM 9A. 

CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer) have 
concluded that our disclosure controls and procedures were effective as of the end of the period covered by this report based on 
the evaluation of the controls and procedures required by Rule 13a-15(b) of the Exchange Act.

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term 
is defined in Exchange Act Rule 13a-15(f).  Under the supervision and with the participation of our management, including our 
Principal Executive Officer and Principal Financial Officer, we evaluated the effectiveness of our internal control over financial 
reporting based on the framework in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring 
Organizations of the Treadway Commission.  Because of inherent limitations, internal control over financial reporting may not 
prevent or detect misstatements.  Also, projections of any evaluation of effectiveness to future periods are subject to the risk 
that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or 
procedures may deteriorate.  Based on our evaluation under that framework and applicable SEC rules, our management 
concluded that our internal control over financial reporting was effective as of December 31, 2015.

The effectiveness of our internal control over financial reporting as of December 31, 2015, has been audited by 
PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their reports which are included 
herein (Item 8).

Changes in Internal Control Over Financial Reporting

There have been no changes in our internal control over financial reporting during the quarter ended December 31, 2015, that 
have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

ITEM 9B. 

OTHER INFORMATION

Not applicable.

PART III.

ITEM 10. 

DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Directors of the Registrant

Information concerning our directors is set forth in our 2016 definitive Proxy Statement and is incorporated herein by this 
reference.

Executive Officers of the Registrant

Information concerning our executive officers is included in Part I, Item 1, Business, of this Annual Report.

Compliance with Section 16(a) of the Exchange Act

Information on compliance with Section 16(a) of the Exchange Act is set forth in our 2016 definitive Proxy Statement and is 
incorporated herein by this reference.

82

Code of Ethics

Information concerning the code of ethics, or code of business conduct, is set forth in our 2016 definitive Proxy Statement and 
is incorporated herein by this reference.

Nominating Procedures

Information concerning the nominating procedures is set forth in our 2016 definitive Proxy Statement and is incorporated 
herein by this reference.

The Audit Committee

Information concerning the Audit Committee is set forth in our 2016 definitive Proxy Statement and is incorporated herein by 
this reference.

The Audit Committee Financial Experts

Information concerning the Audit Committee Financial Experts is set forth in our 2016 definitive Proxy Statement and is 
incorporated herein by this reference.

The Executive Compensation Committee

Information concerning the Executive Compensation Committee is set forth in our 2016 definitive Proxy Statement and is 
incorporated herein by this reference.

The Corporate Governance Committee

Information concerning the Corporate Governance Committee is set forth in our 2016 definitive Proxy Statement and is 
incorporated herein by this reference.

The Executive Committee

Information concerning the Executive Committee is set forth in our 2016 definitive Proxy Statement and is incorporated herein 
by this reference.

Committee Charters

The full text of our Audit Committee charter, Executive Compensation Committee charter, Corporate Governance Committee 
charter and Executive Committee charter are published on and may be printed from our website at www.onegas.com and are 
also available from our corporate secretary upon request.

ITEM 11. 

EXECUTIVE COMPENSATION

Information on executive compensation is set forth in our 2016 definitive Proxy Statement and is incorporated herein by this 
reference.

ITEM 12. 

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND 
RELATED STOCKHOLDER MATTERS

Security Ownership of Certain Beneficial Owners

Information concerning the ownership of certain beneficial owners is set forth in our 2016 definitive Proxy Statement and is 
incorporated herein by this reference.

Security Ownership of Management

Information on security ownership of directors and officers is set forth in our 2016 definitive Proxy Statement and is 
incorporated herein by this reference.

83

Equity Compensation Plan Information

The following table sets forth certain information concerning our equity compensation plans as of December 31, 2015:

Number of Securities Issued
Upon Exercise of Outstanding
Options, Warrants and Rights
(a)

Weighted-Average Exercise
Price of Outstanding Options,
Warrants and Rights
(b)

Number of Securities
Remaining Available For
Future Issuance Under Equity
Compensation Plans
(Excluding Securities in
Column (a))
(c)

— $

— $

— $

— (3)

—

—

2,191,002

612,410

2,803,412

Plan Category
Equity compensation plans approved
by security holders (1)

Equity compensation plans not
approved by security holders (2)

Total

(1) Includes restricted stock incentive units and performance-unit awards granted under our Equity Compensation Plan and our Nonqualified Deferred 
Compensation Plan for Nonemployee Directors. For a brief description of the material features of this plan, see Note 12 of the Notes to Financial Statements 
in this Annual Report.
(2) Includes shares granted under our Employee Stock Purchase Plan and Employee Stock Award Program. For a brief description of the material features of 
these plans, see Note 11 of the Notes to Financial Statements in this Annual Report.  Column (c) includes 546,234 and 66,176 shares available for future 
issuance under our Employee Stock Purchase Plan and Employee Stock Award Program, respectively.
(3) Compensation deferred into our common stock under our Employee Non-Qualified Deferred Compensation Plan and Deferred Compensation Plan for 
Nonemployee Directors is distributed to participants at fair market value on the date of distribution. The price used for these plans to calculate the weighted-
average exercise price in the table is $50.17, which represents the year-end closing price of our common stock on the NYSE.

ITEM 13. 

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR 
INDEPENDENCE

Information on certain relationships and related transactions and director independence is set forth in our 2016 definitive Proxy 
Statement and is incorporated herein by this reference.

ITEM 14. 

PRINCIPAL ACCOUNTING FEES AND SERVICES

Information on the principal accountant’s fees and services is set forth in our 2016 definitive Proxy Statement and is 
incorporated herein by this reference.

84

ITEM 15. 

EXHIBITS, FINANCIAL STATEMENT SCHEDULES

PART IV.

(1)  Financial Statements

Page No.

45

46

47

Report of Independent Registered Public Accounting Firm

Statements of Income for the years ended December 31, 2015, 2014 and 2013

Statements of Comprehensive Income for the years ended 
December 31, 2015, 2014 and 2013

Balance Sheets as of December 31, 2015 and 2014

48-49

Statements of Cash Flows for the years ended December 31, 2015, 2014 and 2013

51

Statements of Equity for the years ended December 31, 2015, 2014 and 2013

52-53

Notes to Financial Statements

54-81

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(2)  Financial Statements Schedules

All schedules have been omitted because of the absence of conditions under which they are required.

(3) Exhibits

2.1

3.1

3.2

4.1

4.2

4.3

Separation and Distribution Agreement, dated as of January 14, 2014, by and between ONE Gas, Inc. and
ONEOK, Inc. (incorporated by reference to Exhibit 2.1 to ONE Gas, Inc.’s Current Report on Form 8-K
filed on January 15, 2014 (File No. 1-36108)).

Amended and Restated Certificate of Incorporation of ONE Gas, Inc., dated January 31, 2014 (incorporated
by reference to Exhibit 4.5 to ONE Gas, Inc.’s Registration Statement on Form S-8 filed on January 31,
2014 (File No. 333-193690)).

Amended and Restated By-Laws of ONE Gas, Inc. (incorporated by reference to Exhibit 4.6
to ONE Gas, Inc.’s Registration Statement on Form S-8 filed on January 31, 2014 (File No. 333-193690)).

Form of Common Stock Certificate (incorporated by reference to Exhibit 4.2 to ONE Gas, Inc.’s
Registration Statement on Form 10, Amendment No. 2 filed on December 23, 2013 (File No. 1-36108)).

Indenture, dated January 27, 2014, between ONE Gas, Inc. and U.S. Bank National Association, as trustee
(incorporated by reference to Exhibit 10.1 to ONE Gas, Inc.’s Current Report on Form 8-K filed on
January 30, 2014 (File No. 1-36108)).

Supplemental Indenture No. 1, dated January 27, 2014, between ONE Gas, Inc. and U.S. Bank National
Association, as trustee (incorporated by reference to Exhibit 10.2 to ONE Gas, Inc.’s
Current Report on Form 8-K filed on January 30, 2014 (File No. 1-36108)).

85

4.4

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.8

10.9

10.10

10.11

10.12

10.13

Registration Rights Agreement, dated January 27, 2014, among Morgan Stanley & Co. LLC, J.P. Morgan
Securities LLC and RBS Securities Inc., as representatives of the several initial purchasers named therein
(incorporated by reference to Exhibit 10.3 to ONE Gas, Inc.’s Current Report on Form 8-K filed on
January 30, 2014 (File No. 1-36108)).

Tax Matters Agreement, dated January 14, 2014, by and between ONE Gas, Inc. and ONEOK, Inc.
(incorporated by reference to Exhibit 10.1 to ONE Gas, Inc.’s Current Report on Form 8-K filed on January
15, 2014 (File No. 1-36108)).

Transition Services Agreement, dated January 14, 2014, by and between ONE Gas, Inc. and ONEOK, Inc.
(incorporated by reference to Exhibit 10.2 to ONE Gas, Inc.’s Current Report on Form 8-K filed on January
15, 2014 (File No. 1-36108)).

Employee Matters Agreement, dated January 14, 2014, by and between ONE Gas, Inc. and ONEOK, Inc.
(incorporated by reference to Exhibit 10.3 to ONE Gas, Inc.’s Current Report on Form 8-K filed on January
15, 2014 (File No. 1-36108)).

Form of ONE Gas, Inc. Indemnification Agreement between ONE Gas, Inc. and ONE Gas, Inc. officers and
directors (incorporated by reference to Exhibit 10.5 to ONE Gas, Inc.’s Registration Statement on Form
10 filed on October 1, 2013 (File No. 1-36108)).

ONE Gas, Inc. Annual Officer Incentive Plan (incorporated by reference to Exhibit 10.6 to ONE Gas, Inc.’s
Registration Statement on Form 10, Amendment No. 2 filed on December 23, 2013 (File No. 1-36108)).

ONE Gas, Inc. Pre-2005 Nonqualified Deferred Compensation Plan (incorporated by reference
to Exhibit 10.7 to ONE Gas, Inc.’s Registration Statement on Form 10, Amendment No. 2 filed on December 
23, 2013 (File No. 1-36108)).

ONE Gas, Inc. Employee Nonqualified Deferred Compensation Plan (incorporated by reference
to Exhibit 10.8 to ONE Gas, Inc.’s Registration Statement on Form 10, Amendment No. 2 filed on December 
23, 2013 (File No. 1-36108)).

ONE Gas, Inc. Pre-2005 Supplemental Executive Retirement Plan (incorporated by reference to
Exhibit 10.9 to ONE Gas, Inc.’s Registration Statement on Form 10, Amendment No. 2 filed on December 
23, 2013 (File No. 1-36108)).

ONE Gas, Inc. Supplemental Executive Retirement Plan (incorporated by reference to Exhibit
10.10 to ONE Gas, Inc.’s Registration Statement on Form 10, Amendment No. 2 filed on December 23, 2013 
(File No. 1-36108)).

Credit Agreement, dated as of December 20, 2013, among ONE Gas, Inc., Bank of America, N.A.,
as administrative agent, swingline lender and a letter of credit issuer, and the other lenders and letter of credit
issuers parties thereto (incorporated by reference to Exhibit 10.2 to ONEOK, Inc.’s Current Report on Form
8-K filed on December 23, 2013 (File No. 1-13643)).

ONE Gas, Inc. Officer Change in Control Severance Plan (incorporated by reference to
Exhibit 10.12 to ONE Gas, Inc.’s Registration Statement filed on Form 10, Amendment No. 2 filed on 
December 23, 2013 (File No. 1-36108)).

ONE Gas, Inc. Equity Compensation Plan (incorporated by reference to Exhibit 10.13 to ONE
Gas, Inc.’s Registration Statement on Form 10, Amendment No. 2 filed on December 23, 2013 (File No. 
1-36108)).

Form of 2014 Restricted Unit Award Agreement (incorporated by reference to Exhibit 10.13 to ONE Gas,
Inc.’s Annual Report on Form 10-K filed on February 25, 2014 (File No. 1-36108)).

86

10.14

10.15

10.16

10.17

10.18

10.19

10.20

10.21

10.22

10.23

10.24

10.25

12.1

21.1

23.1

31.1

31.2

32.1

32.2

Form of 2014 Performance Unit Award Agreement (incorporated by reference to Exhibit 10.14 to ONE Gas,
Inc.’s Annual Report on Form 10-K filed on February 25, 2014 (File No. 1-36108)).

Form of 2013 Restricted Unit Award Agreement (incorporated by reference to Exhibit 10.15 to ONE Gas,
Inc.’s Annual Report on Form 10-K filed on February 25, 2014 (File No. 1-36108)).

Form of 2013 Performance Unit Award Agreement (incorporated by reference to Exhibit 10.16 to ONE Gas,
Inc.’s Annual Report on Form 10-K filed on February 25, 2014 (File No. 1-36108)).

ONE Gas, Inc. Equity Compensation Plan (incorporated by reference to Appendix A to ONE Gas, Inc.’s
Definitive Proxy Statement on Schedule 14A filed on April 1, 2015 (File No. 1-36108)).

ONE Gas, Inc. Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.16 to ONE Gas,
Inc.’s Registration Statement on Form 10, Amendment No. 2 filed on December 23, 2013 (File No. 
1-36108)).

ONE Gas, Inc. Deferred Compensation Plan for Non-Employee Directors (incorporated by reference to
Exhibit 10.1 to ONE Gas, Inc. Current Report on Form 8-K filed on February 24, 2014 (File No. 1-36108)).

ONE Gas, Inc. 401(k) Plan of ONE Gas Employees and Former ONE Gas Employees effective as of January
1, 2014 (incorporated by reference to Exhibit 4.4 to ONE Gas, Inc.’s Registration Statement on Form S-8
filed on January 31, 2014 (File No. 333-193690)).

Form of Commercial Paper Dealer Agreement (incorporated by reference to Exhibit 10.1 to ONE Gas, Inc.’s
Current Report on Form 8-K filed on September 10, 2014 (File No. 1-36108)).

Form of 2015 Performance Unit Award Agreement (incorporated by reference to Exhibit 10.2 to ONE Gas,
Inc.’s Quarterly Report on Form 10-Q filed on April 30, 2015 (File 1-36108)).

Form of 2015 Restricted Unit Award Agreement (incorporated by reference to Exhibit 10.3 to ONE Gas,
Inc.’s Quarterly Report on Form 10-Q filed on April 30, 2015 (File 1-36108)).

Form of 2016 Performance Unit Award Agreement.

Form of 2016 Restricted Unit Award Agreement.

Computation of Ratio of Earnings to Fixed Charges for the years ended December 31, 2015, 2014, 2013,
2012 and 2011.

Subsidiaries of ONE Gas, Inc.

Consent of Independent Registered Public Accounting Firm - PricewaterhouseCoopers LLP.

Certification of Pierce H. Norton II pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Certification of Curtis L. Dinan pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Certification of Pierce H. Norton II pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002 (furnished only pursuant to Rule 13a-14(b)).

Certification of Curtis L. Dinan pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002 (furnished only pursuant to Rule 13a-14(b)). 

87

101.INS

XBRL Instance Document.

101.SCH

XBRL Schema Document.

101.CAL

XBRL Calculation Linkbase Document.

101.LAB

XBRL Label Linkbase Document.

101. PRE

XBRL Presentation Linkbase Document.

101.DEF

XBRL Extension Definition Linkbase Document.

Attached as Exhibit 101 to this Annual Report are the following XBRL-related documents: (i) Document and Entity 
Information; (ii) Statements of Income for the years ended December 31, 2015, 2014 and 2013; (iii) Statements of  
Comprehensive Income for the years ended December 31, 2015, 2014 and 2013; (iv) Balance Sheets for the years ended 
December 31, 2015 and 2014; (v) Statements of Cash Flows for the years ended December 31, 2015, 2014 and 2013; (vi) 
Statements of Equity for the years ended December 31, 2015, 2014 and 2013; and (vii) Notes to Financial Statements.

We also make available on our website the Interactive Data Files submitted as Exhibit 101 to this Annual Report.

88

Signatures

Pursuant to the requirements of Section 13 or 15(d) of the Exchange Act, the registrant has duly caused this report to be signed 
on its behalf by the undersigned, thereunto duly authorized.

Date: February 18, 2016

ONE Gas, Inc.

Registrant

By:

/s/ Curtis L. Dinan
Curtis L. Dinan
Senior Vice President,
Chief Financial Officer and Treasurer

Pursuant to the requirements of the Exchange Act, this report has been signed below by the following persons on behalf of the 
registrant and in the capacities indicated on this 18th day of February 2016.

/s/ John W. Gibson
John W. Gibson
Chairman of the Board

/s/ Curtis L. Dinan
Curtis L. Dinan
Senior Vice President,
Chief Financial Officer and Treasurer
(Principal Accounting Officer)

/s/ Michael G. Hutchinson
Michael G. Hutchinson
Director

/s/ Eduardo A. Rodriguez

Eduardo A. Rodriguez
Director

/s/ Pierce H. Norton II
Pierce H. Norton II
President, Chief Executive Officer and
Director

/s/ Robert B. Evans
Robert B. Evans
Director

/s/ Pattye L. Moore
Pattye L. Moore
Director

/s/ Douglas H. Yaeger

Douglas H. Yaeger
Director

89

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Forward-looking Statements

Statements contained in this annual report that include company 
expectations or predictions should be considered forward-looking 
statements that are covered by the safe harbor provisions of the 
Securities Act of 1933 and the Securities Exchange Act of 1934, 
as amended.

It is important to note that the actual results could differ materially 
from those projected in such forward-looking statements.

For additional information that could cause actual results to differ 
materially from such forward-looking statements, refer to ONE Gas’ 
Securities and Exchange Commission fi lings.

Shareholder Information

Wells Fargo Shareowner Services
P.O. Box 64874
St. Paul, MN 55164-0856 
P: 1-855-217-6403
P: (Outside U.S.) 1-651-450-4064
TDD number: 1-651-450-4144
www.shareowneronline.com

Direct Stock Purchase & Dividend Reinvestment Plan
ONE Gas’ Direct Stock Purchase and Dividend Reinvestment Plan 
provides new investors and current shareholders a convenient way to 
purchase ONE Gas common stock without paying processing fees or 
service charges and to reinvest cash dividends. For more information 
or to enroll in the plan, call Wells Fargo at 1-855-217-6403. The 
Prospectus is also available at www.onegas.com.

Annual Meeting Details
First Place Tower
15 East Fifth Street
Tulsa, OK 74103

May 26, 2016 – 9 a.m. CDT

Auditors 
PricewaterhouseCoopers LLP
Two Warren Place
6120 South Yale Avenue, Suite 1850
Tulsa, OK 74136

Corporate Headquarters
First Place Tower 
15 East Fifth Street
Tulsa, OK 74103

Credit Ratings
Moody’s: A2 (Stable)
Standard & Poor’s: A- (Stable)

Investor Relations
ONE Gas Investor Relations 
Department
P.O. Box 21049
Tulsa, OK 74121
P: 1-855-496-0200
E: IR@onegas.com 

Andrew Ziola, Vice President, 
Investor Relations and Public Affairs
P: 1-918-947-7163
E: andrew.ziola@onegas.com

Board of Directors

From left to right:

Douglas H. Yaeger
Retired Chairman, President and Chief Executive Offi  cer, Laclede Gas Company 

John W. Gibson
Chairman, ONE Gas, Inc.

Eduardo A. Rodriguez
President, Strategic Communications Consulting Group

Robert B. Evans
Retired President and Chief Executive Offi  cer, Duke Energy Americas

Pattye L. Moore
Chairman, Red Robin Gourmet Burgers

Pierce H. Norton II
President and Chief Executive Offi  cer, ONE Gas, Inc.

Michael G. Hutchinson
Retired Partner, Deloitte & Touche

Executive Team

Joseph L. McCormick, 56
Senior Vice President, General 
Counsel and Assistant Secretary

Caron A. Lawhorn, 55
Senior Vice President, Commercial

Robert S. McAnnally, 52
Senior Vice President, Operations

Mark A. Bender, 51
Senior Vice President, 
Administration,
Chief Information Offi  cer

Andrew J. Ziola, 46
Vice President, 
Investor Relations and 
Public Aff  airs

Pierce H. Norton II, 56
President and Chief 
Executive Offi  cer

Curtis L. Dinan, 48
Senior Vice President, 
Chief Financial Offi  cer 
and Treasurer

16

FPO

15 East Fifth Street, Tulsa, OK 74103
918-947-7000 • www.onegas.com