NORTHERN TR CORP

Ticker: NTRS CUSIP: 665859104 Class: COM

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

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

Q4 2020

Shares 28,710 Value ($000) $2,674 Avg Close $75.32 Range $64.54 - $84.00

Q3 2020

Shares 29,227 Value ($000) $2,279 Avg Close $67.99 Range $61.38 - $73.22

Q2 2020

Shares 29,702 Value ($000) $2,357 Avg Close $66.60 Range $56.52 - $77.90

Q1 2020

Shares 30,231 Value ($000) $2,281 Avg Close $76.24 Range $50.86 - $91.21

Q4 2019

Shares 30,231 Value ($000) $3,212 Avg Close $84.53 Range $70.73 - $91.70

Q3 2019

Shares 30,615 Value ($000) $2,857 Avg Close $75.31 Range $68.73 - $82.36

Q2 2019

Shares 31,044 Value ($000) $2,794 Avg Close $75.01 Range $68.81 - $81.17

Q1 2019

Shares 31,159 Value ($000) $2,817 Avg Close $72.96 Range $66.04 - $78.80

Q4 2018

Shares 31,214 Value ($000) $2,609 Avg Close $75.32 Range $61.37 - $86.09

Q3 2018

Shares 31,389 Value ($000) $3,206 Avg Close $85.59 Range $81.23 - $92.33

Q2 2018

Shares 29,673 Value ($000) $3,053 Avg Close $84.33 Range $79.47 - $87.26

Q1 2018

Shares 29,635 Value ($000) $3,056 Avg Close $82.97 Range $74.79 - $88.15

Q4 2017

Shares 29,917 Value ($000) $2,988 Avg Close $75.28 Range $71.84 - $80.39

Q3 2017

Shares 29,815 Value ($000) $2,741 Avg Close $71.05 Range $67.61 - $77.97

Q2 2017

Shares 29,952 Value ($000) $2,912 Avg Close $70.42 Range $66.40 - $77.52

Q1 2017

Shares 29,720 Value ($000) $2,573 Avg Close $67.79 Range $63.77 - $70.95

Q4 2016

Shares 29,116 Value ($000) $2,593 Avg Close $61.69 Range $52.36 - $70.81

Q2 2016

Shares 28,888 Value ($000) $1,914 Avg Close $53.49 Range $47.26 - $57.41

Q1 2016

Shares 28,671 Value ($000) $1,868 Avg Close $47.88 Range $41.46 - $54.24

Q4 2015

Shares 28,394 Value ($000) $2,047 Avg Close $54.64 Range $49.15 - $57.77

Q3 2015

Shares 28,320 Value ($000) $1,930 Avg Close $55.52 Range $49.19 - $59.82

Q2 2015

Shares 28,247 Value ($000) $2,160 Avg Close $56.07 Range $51.74 - $59.54

Q1 2015

Shares 28,265 Value ($000) $1,969 Avg Close $51.14 Range $45.68 - $54.62

Q4 2014

Shares 331,846 Value ($000) $22,366 Avg Close $49.58 Range $45.22 - $51.59

Q3 2014

Shares 310,403 Value ($000) $21,117 Avg Close $49.84 Range $46.73 - $52.70

Q2 2014

Shares 316,705 Value ($000) $20,362 Avg Close $45.46 Range $42.93 - $48.59

Q1 2014

Shares 296,758 Value ($000) $19,455 Avg Close $45.55 Range $42.73 - $49.47

Q4 2013

Shares 305,048 Value ($000) $18,879 Avg Close $41.82 Range $38.19 - $45.43

Q3 2013

Shares 42,211 Value ($000) $2,296 Avg Close $41.67 Range $39.30 - $44.95

Q2 2013

Shares 46,000 Value ($000) $2,663 Avg Close $40.35 Range $37.41 - $42.83

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	28,710	$2,674	$75.32	$64.54 - $84.00
Q3 2020	29,227	$2,279	$67.99	$61.38 - $73.22
Q2 2020	29,702	$2,357	$66.60	$56.52 - $77.90
Q1 2020	30,231	$2,281	$76.24	$50.86 - $91.21
Q4 2019	30,231	$3,212	$84.53	$70.73 - $91.70
Q3 2019	30,615	$2,857	$75.31	$68.73 - $82.36
Q2 2019	31,044	$2,794	$75.01	$68.81 - $81.17
Q1 2019	31,159	$2,817	$72.96	$66.04 - $78.80
Q4 2018	31,214	$2,609	$75.32	$61.37 - $86.09
Q3 2018	31,389	$3,206	$85.59	$81.23 - $92.33
Q2 2018	29,673	$3,053	$84.33	$79.47 - $87.26
Q1 2018	29,635	$3,056	$82.97	$74.79 - $88.15
Q4 2017	29,917	$2,988	$75.28	$71.84 - $80.39
Q3 2017	29,815	$2,741	$71.05	$67.61 - $77.97
Q2 2017	29,952	$2,912	$70.42	$66.40 - $77.52
Q1 2017	29,720	$2,573	$67.79	$63.77 - $70.95
Q4 2016	29,116	$2,593	$61.69	$52.36 - $70.81
Q2 2016	28,888	$1,914	$53.49	$47.26 - $57.41
Q1 2016	28,671	$1,868	$47.88	$41.46 - $54.24
Q4 2015	28,394	$2,047	$54.64	$49.15 - $57.77
Q3 2015	28,320	$1,930	$55.52	$49.19 - $59.82
Q2 2015	28,247	$2,160	$56.07	$51.74 - $59.54
Q1 2015	28,265	$1,969	$51.14	$45.68 - $54.62
Q4 2014	331,846	$22,366	$49.58	$45.22 - $51.59
Q3 2014	310,403	$21,117	$49.84	$46.73 - $52.70
Q2 2014	316,705	$20,362	$45.46	$42.93 - $48.59
Q1 2014	296,758	$19,455	$45.55	$42.73 - $49.47
Q4 2013	305,048	$18,879	$41.82	$38.19 - $45.43
Q3 2013	42,211	$2,296	$41.67	$39.30 - $44.95
Q2 2013	46,000	$2,663	$40.35	$37.41 - $42.83