ALLEGHENY TECHNOLOGIES INC

Ticker: ATI CUSIP: 01741R102 Class: EQTY

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

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

Q4 2020

Shares 47,290 Value ($000) $793 Avg Close $12.70 Range $8.24 - $17.60

Q3 2020

Shares 47,508 Value ($000) $414 Avg Close $9.20 Range $8.04 - $11.06

Q2 2020

Shares 69,393 Value ($000) $707 Avg Close $8.67 Range $6.21 - $12.60

Q1 2020

Shares 67,063 Value ($000) $570 Avg Close $15.97 Range $4.95 - $20.91

Q4 2019

Shares 67,063 Value ($000) $1,386 Avg Close $21.68 Range $18.98 - $24.17

Q3 2019

Shares 66,119 Value ($000) $1,339 Avg Close $21.15 Range $17.03 - $25.66

Q2 2019

Shares 67,179 Value ($000) $1,693 Avg Close $24.37 Range $21.15 - $27.49

Q1 2019

Shares 66,835 Value ($000) $1,709 Avg Close $26.33 Range $21.00 - $29.50

Q4 2018

Shares 65,833 Value ($000) $1,433 Avg Close $25.93 Range $20.84 - $29.84

Q3 2018

Shares 64,552 Value ($000) $1,908 Avg Close $26.89 Range $24.31 - $30.18

Q2 2018

Shares 64,442 Value ($000) $1,619 Avg Close $27.05 Range $22.93 - $29.87

Q1 2018

Shares 63,115 Value ($000) $1,495 Avg Close $26.83 Range $22.70 - $30.25

Q4 2017

Shares 62,009 Value ($000) $1,497 Avg Close $23.80 Range $21.01 - $26.59

Q3 2017

Shares 54,041 Value ($000) $1,292 Avg Close $19.78 Range $16.51 - $24.00

Q2 2017

Shares 53,159 Value ($000) $904 Avg Close $16.82 Range $14.54 - $20.11

Q1 2017

Shares 51,383 Value ($000) $923 Avg Close $18.80 Range $15.61 - $23.69

Q4 2016

Shares 50,839 Value ($000) $810 Avg Close $16.62 Range $13.15 - $19.20

Q2 2016

Shares 49,653 Value ($000) $633 Avg Close $14.18 Range $10.81 - $17.83

Q1 2016

Shares 47,421 Value ($000) $773 Avg Close $12.00 Range $6.97 - $18.17

Q4 2015

Shares 45,741 Value ($000) $515 Avg Close $13.45 Range $9.91 - $18.65

Q3 2015

Shares 44,909 Value ($000) $637 Avg Close $20.12 Range $13.34 - $30.02

Q2 2015

Shares 14,063 Value ($000) $425 Avg Close $31.90 Range $27.97 - $36.35

Q1 2015

Shares 13,990 Value ($000) $420 Avg Close $29.80 Range $25.96 - $33.60

Q4 2014

Shares 17,673 Value ($000) $614 Avg Close $31.49 Range $28.73 - $35.21

Q3 2014

Shares 17,799 Value ($000) $660 Avg Close $39.92 Range $34.97 - $43.90

Q2 2014

Shares 17,773 Value ($000) $802 Avg Close $38.68 Range $35.44 - $42.89

Q1 2014

Shares 17,878 Value ($000) $674 Avg Close $31.60 Range $27.91 - $36.14

Q4 2013

Shares 17,958 Value ($000) $640 Avg Close $30.74 Range $27.52 - $33.68

Q3 2013

Shares 20,401 Value ($000) $623 Avg Close $26.04 Range $23.74 - $30.56

Q2 2013

Shares 22,727 Value ($000) $598 Avg Close $26.04 Range $23.70 - $29.42

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	47,290	$793	$12.70	$8.24 - $17.60
Q3 2020	47,508	$414	$9.20	$8.04 - $11.06
Q2 2020	69,393	$707	$8.67	$6.21 - $12.60
Q1 2020	67,063	$570	$15.97	$4.95 - $20.91
Q4 2019	67,063	$1,386	$21.68	$18.98 - $24.17
Q3 2019	66,119	$1,339	$21.15	$17.03 - $25.66
Q2 2019	67,179	$1,693	$24.37	$21.15 - $27.49
Q1 2019	66,835	$1,709	$26.33	$21.00 - $29.50
Q4 2018	65,833	$1,433	$25.93	$20.84 - $29.84
Q3 2018	64,552	$1,908	$26.89	$24.31 - $30.18
Q2 2018	64,442	$1,619	$27.05	$22.93 - $29.87
Q1 2018	63,115	$1,495	$26.83	$22.70 - $30.25
Q4 2017	62,009	$1,497	$23.80	$21.01 - $26.59
Q3 2017	54,041	$1,292	$19.78	$16.51 - $24.00
Q2 2017	53,159	$904	$16.82	$14.54 - $20.11
Q1 2017	51,383	$923	$18.80	$15.61 - $23.69
Q4 2016	50,839	$810	$16.62	$13.15 - $19.20
Q2 2016	49,653	$633	$14.18	$10.81 - $17.83
Q1 2016	47,421	$773	$12.00	$6.97 - $18.17
Q4 2015	45,741	$515	$13.45	$9.91 - $18.65
Q3 2015	44,909	$637	$20.12	$13.34 - $30.02
Q2 2015	14,063	$425	$31.90	$27.97 - $36.35
Q1 2015	13,990	$420	$29.80	$25.96 - $33.60
Q4 2014	17,673	$614	$31.49	$28.73 - $35.21
Q3 2014	17,799	$660	$39.92	$34.97 - $43.90
Q2 2014	17,773	$802	$38.68	$35.44 - $42.89
Q1 2014	17,878	$674	$31.60	$27.91 - $36.14
Q4 2013	17,958	$640	$30.74	$27.52 - $33.68
Q3 2013	20,401	$623	$26.04	$23.74 - $30.56
Q2 2013	22,727	$598	$26.04	$23.70 - $29.42