ONE GAS INC

Ticker: OGS CUSIP: 68235P108 Class: COM

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

Note: Option positions (PUT/CALL) are excluded.

Q4 2020

Shares 28,357 Value ($000) $2,177 Avg Close $75.58 Range $66.94 - $82.40

Q3 2020

Shares 28,324 Value ($000) $1,955 Avg Close $73.69 Range $65.51 - $79.98

Q2 2020

Shares 28,970 Value ($000) $2,232 Avg Close $80.79 Range $72.25 - $92.00

Q1 2020

Shares 28,050 Value ($000) $2,346 Avg Close $88.45 Range $63.67 - $96.97

Q4 2019

Shares 28,050 Value ($000) $2,625 Avg Close $91.47 Range $84.90 - $96.66

Q3 2019

Shares 27,655 Value ($000) $2,658 Avg Close $91.28 Range $86.81 - $96.53

Q2 2019

Shares 28,083 Value ($000) $2,536 Avg Close $88.47 Range $85.45 - $92.66

Q1 2019

Shares 27,957 Value ($000) $2,489 Avg Close $84.03 Range $75.82 - $90.52

Q4 2018

Shares 27,513 Value ($000) $2,190 Avg Close $82.46 Range $75.51 - $87.75

Q3 2018

Shares 26,974 Value ($000) $2,219 Avg Close $78.28 Range $73.75 - $83.12

Q2 2018

Shares 26,911 Value ($000) $2,011 Avg Close $71.11 Range $65.00 - $76.24

Q1 2018

Shares 26,253 Value ($000) $1,733 Avg Close $67.29 Range $62.20 - $73.58

Q4 2017

Shares 25,751 Value ($000) $1,887 Avg Close $75.81 Range $70.66 - $79.51

Q3 2017

Shares 25,943 Value ($000) $1,910 Avg Close $73.35 Range $68.45 - $76.06

Q2 2017

Shares 25,620 Value ($000) $1,789 Avg Close $69.75 Range $67.27 - $72.97

Q1 2017

Shares 24,679 Value ($000) $1,668 Avg Close $64.84 Range $61.42 - $68.79

Q4 2016

Shares 24,384 Value ($000) $1,560 Avg Close $60.73 Range $55.98 - $64.94

Q2 2016

Shares 23,787 Value ($000) $1,584 Avg Close $60.28 Range $56.51 - $66.60

Q1 2016

Shares 22,768 Value ($000) $1,391 Avg Close $56.41 Range $48.01 - $62.25

Q4 2015

Shares 21,845 Value ($000) $1,096 Avg Close $48.28 Range $44.68 - $51.79

Q3 2015

Shares 21,443 Value ($000) $972 Avg Close $43.80 Range $41.23 - $45.58

Q2 2015

Shares 21,317 Value ($000) $907 Avg Close $42.67 Range $40.83 - $44.75

Q1 2015

Shares 21,002 Value ($000) $908 Avg Close $42.74 Range $38.88 - $46.50

Q4 2014

Shares 20,357 Value ($000) $839 Avg Close $38.82 Range $34.05 - $44.32

Q3 2014

Shares 20,407 Value ($000) $699 Avg Close $36.60 Range $34.21 - $38.62

Q2 2014

Shares 20,186 Value ($000) $762 Avg Close $36.58 Range $34.90 - $38.91

Q1 2014

Shares 28,112 Value ($000) $1,010 Avg Close $34.23 Range $31.94 - $37.01

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	28,357	$2,177	$75.58	$66.94 - $82.40
Q3 2020	28,324	$1,955	$73.69	$65.51 - $79.98
Q2 2020	28,970	$2,232	$80.79	$72.25 - $92.00
Q1 2020	28,050	$2,346	$88.45	$63.67 - $96.97
Q4 2019	28,050	$2,625	$91.47	$84.90 - $96.66
Q3 2019	27,655	$2,658	$91.28	$86.81 - $96.53
Q2 2019	28,083	$2,536	$88.47	$85.45 - $92.66
Q1 2019	27,957	$2,489	$84.03	$75.82 - $90.52
Q4 2018	27,513	$2,190	$82.46	$75.51 - $87.75
Q3 2018	26,974	$2,219	$78.28	$73.75 - $83.12
Q2 2018	26,911	$2,011	$71.11	$65.00 - $76.24
Q1 2018	26,253	$1,733	$67.29	$62.20 - $73.58
Q4 2017	25,751	$1,887	$75.81	$70.66 - $79.51
Q3 2017	25,943	$1,910	$73.35	$68.45 - $76.06
Q2 2017	25,620	$1,789	$69.75	$67.27 - $72.97
Q1 2017	24,679	$1,668	$64.84	$61.42 - $68.79
Q4 2016	24,384	$1,560	$60.73	$55.98 - $64.94
Q2 2016	23,787	$1,584	$60.28	$56.51 - $66.60
Q1 2016	22,768	$1,391	$56.41	$48.01 - $62.25
Q4 2015	21,845	$1,096	$48.28	$44.68 - $51.79
Q3 2015	21,443	$972	$43.80	$41.23 - $45.58
Q2 2015	21,317	$907	$42.67	$40.83 - $44.75
Q1 2015	21,002	$908	$42.74	$38.88 - $46.50
Q4 2014	20,357	$839	$38.82	$34.05 - $44.32
Q3 2014	20,407	$699	$36.60	$34.21 - $38.62
Q2 2014	20,186	$762	$36.58	$34.90 - $38.91
Q1 2014	28,112	$1,010	$34.23	$31.94 - $37.01