ALLEGHENY TECHNOLOGIES INC

Ticker: ATI CUSIP: 01741R102 Class: EQTY

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q4 2025

Shares 33,999 Value ($000) $3,902 Avg Close $97.45 Range $79.29 - $117.48

Q3 2025

Shares 35,374 Value ($000) $2,877 Avg Close $81.04 Range $70.42 - $96.20

Q2 2025

Shares 36,245 Value ($000) $3,129 Avg Close $68.45 Range $39.23 - $87.75

Q1 2025

Shares 34,097 Value ($000) $1,774 Avg Close $56.77 Range $49.07 - $66.80

Q4 2024

Shares 30,452 Value ($000) $1,676 Avg Close $58.97 Range $52.45 - $67.09

Q3 2024

Shares 26,604 Value ($000) $1,780 Avg Close $62.09 Range $53.90 - $68.92

Q2 2024

Shares 26,815 Value ($000) $1,487 Avg Close $56.03 Range $47.90 - $62.44

Q1 2024

Shares 27,551 Value ($000) $1,410 Avg Close $45.22 Range $38.04 - $51.95

Q4 2023

Shares 27,530 Value ($000) $1,252 Avg Close $41.52 Range $35.03 - $46.57

Q3 2023

Shares 85,966 Value ($000) $3,538 Avg Close $44.44 Range $41.04 - $47.92

Q2 2023

Shares 145,307 Value ($000) $6,427 Avg Close $38.25 Range $34.10 - $44.39

Q1 2023

Shares 137,031 Value ($000) $5,407 Avg Close $37.76 Range $29.37 - $43.32

Q4 2022

Shares 138,506 Value ($000) $4 Avg Close $29.27 Range $25.39 - $31.74

Q3 2022

Shares 118,357 Value ($000) $3,149 Avg Close $27.84 Range $20.52 - $33.31

Q2 2022

Shares 113,159 Value ($000) $2,570 Avg Close $26.35 Range $20.87 - $30.74

Q1 2022

Shares 109,700 Value ($000) $2,944 Avg Close $23.18 Range $16.02 - $28.45

Q4 2021

Shares 96,174 Value ($000) $1,532 Avg Close $16.05 Range $13.85 - $18.33

Q3 2021

Shares 96,480 Value ($000) $1,604 Avg Close $18.91 Range $15.75 - $22.33

Q2 2021

Shares 97,617 Value ($000) $2,035 Avg Close $22.93 Range $20.15 - $25.04

Q1 2021

Shares 97,810 Value ($000) $2,060 Avg Close $19.55 Range $15.97 - $22.87

Q4 2020

Shares 98,239 Value ($000) $1,647 Avg Close $12.70 Range $8.24 - $17.60

Q3 2020

Shares 98,262 Value ($000) $857 Avg Close $9.20 Range $8.04 - $11.06

Q2 2020

Shares 38,830 Value ($000) $396 Avg Close $8.67 Range $6.21 - $12.60

Q1 2020

Shares 40,503 Value ($000) $344 Avg Close $15.97 Range $4.95 - $20.91

Q4 2019

Shares 24,879 Value ($000) $514 Avg Close $21.68 Range $18.98 - $24.17

Q3 2019

Shares 23,078 Value ($000) $467 Avg Close $21.15 Range $17.03 - $25.66

Q2 2019

Shares 31,186 Value ($000) $786 Avg Close $24.37 Range $21.15 - $27.49

Q1 2019

Shares 26,745 Value ($000) $684 Avg Close $26.33 Range $21.00 - $29.50

Q4 2018

Shares 23,789 Value ($000) $518 Avg Close $25.93 Range $20.84 - $29.84

Q3 2018

Shares 25,535 Value ($000) $755 Avg Close $26.89 Range $24.31 - $30.18

Q2 2018

Shares 33,915 Value ($000) $852 Avg Close $27.05 Range $22.93 - $29.87

Q1 2018

Shares 33,881 Value ($000) $802 Avg Close $26.83 Range $22.70 - $30.25

Q4 2017

Shares 19,301 Value ($000) $466 Avg Close $23.80 Range $21.01 - $26.59

Q3 2017

Shares 16,225 Value ($000) $388 Avg Close $19.78 Range $16.51 - $24.00

Q2 2017

Shares 21,470 Value ($000) $365 Avg Close $16.82 Range $14.54 - $20.11

Q1 2017

Shares 19,730 Value ($000) $354 Avg Close $18.80 Range $15.61 - $23.69

Q4 2016

Shares 20,769 Value ($000) $331 Avg Close $16.62 Range $13.15 - $19.20

Q3 2016

Shares 17,841 Value ($000) $322 Avg Close $16.54 Range $12.22 - $18.59

Q2 2016

Shares 22,916 Value ($000) $292 Avg Close $14.18 Range $10.81 - $17.83

Q1 2016

Shares 27,358 Value ($000) $446 Avg Close $12.00 Range $6.97 - $18.17

Q4 2015

Shares 31,944 Value ($000) $359 Avg Close $13.45 Range $9.91 - $18.65

Q3 2015

Shares 32,469 Value ($000) $460 Avg Close $20.12 Range $13.34 - $30.02

Q2 2015

Shares 18,884 Value ($000) $570 Avg Close $31.90 Range $27.97 - $36.35

Q1 2015

Shares 16,742 Value ($000) $502 Avg Close $29.80 Range $25.96 - $33.60

Q4 2014

Shares 24,368 Value ($000) $847 Avg Close $31.49 Range $28.73 - $35.21

Q3 2014

Shares 24,369 Value ($000) $904 Avg Close $39.92 Range $34.97 - $43.90

Q2 2014

Shares 23,330 Value ($000) $1,052 Avg Close $38.68 Range $35.44 - $42.89

Q1 2014

Shares 47,041 Value ($000) $1,773 Avg Close $31.60 Range $27.91 - $36.14

Q4 2013

Shares 48,835 Value ($000) $1,740 Avg Close $30.74 Range $27.52 - $33.68

Q3 2013

Shares 48,493 Value ($000) $1,480 Avg Close $26.04 Range $23.74 - $30.56

Q2 2013

Shares 24,604 Value ($000) $647 Avg Close $26.04 Range $23.70 - $29.42

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	33,999	$3,902	$97.45	$79.29 - $117.48
Q3 2025	35,374	$2,877	$81.04	$70.42 - $96.20
Q2 2025	36,245	$3,129	$68.45	$39.23 - $87.75
Q1 2025	34,097	$1,774	$56.77	$49.07 - $66.80
Q4 2024	30,452	$1,676	$58.97	$52.45 - $67.09
Q3 2024	26,604	$1,780	$62.09	$53.90 - $68.92
Q2 2024	26,815	$1,487	$56.03	$47.90 - $62.44
Q1 2024	27,551	$1,410	$45.22	$38.04 - $51.95
Q4 2023	27,530	$1,252	$41.52	$35.03 - $46.57
Q3 2023	85,966	$3,538	$44.44	$41.04 - $47.92
Q2 2023	145,307	$6,427	$38.25	$34.10 - $44.39
Q1 2023	137,031	$5,407	$37.76	$29.37 - $43.32
Q4 2022	138,506	$4	$29.27	$25.39 - $31.74
Q3 2022	118,357	$3,149	$27.84	$20.52 - $33.31
Q2 2022	113,159	$2,570	$26.35	$20.87 - $30.74
Q1 2022	109,700	$2,944	$23.18	$16.02 - $28.45
Q4 2021	96,174	$1,532	$16.05	$13.85 - $18.33
Q3 2021	96,480	$1,604	$18.91	$15.75 - $22.33
Q2 2021	97,617	$2,035	$22.93	$20.15 - $25.04
Q1 2021	97,810	$2,060	$19.55	$15.97 - $22.87
Q4 2020	98,239	$1,647	$12.70	$8.24 - $17.60
Q3 2020	98,262	$857	$9.20	$8.04 - $11.06
Q2 2020	38,830	$396	$8.67	$6.21 - $12.60
Q1 2020	40,503	$344	$15.97	$4.95 - $20.91
Q4 2019	24,879	$514	$21.68	$18.98 - $24.17
Q3 2019	23,078	$467	$21.15	$17.03 - $25.66
Q2 2019	31,186	$786	$24.37	$21.15 - $27.49
Q1 2019	26,745	$684	$26.33	$21.00 - $29.50
Q4 2018	23,789	$518	$25.93	$20.84 - $29.84
Q3 2018	25,535	$755	$26.89	$24.31 - $30.18
Q2 2018	33,915	$852	$27.05	$22.93 - $29.87
Q1 2018	33,881	$802	$26.83	$22.70 - $30.25
Q4 2017	19,301	$466	$23.80	$21.01 - $26.59
Q3 2017	16,225	$388	$19.78	$16.51 - $24.00
Q2 2017	21,470	$365	$16.82	$14.54 - $20.11
Q1 2017	19,730	$354	$18.80	$15.61 - $23.69
Q4 2016	20,769	$331	$16.62	$13.15 - $19.20
Q3 2016	17,841	$322	$16.54	$12.22 - $18.59
Q2 2016	22,916	$292	$14.18	$10.81 - $17.83
Q1 2016	27,358	$446	$12.00	$6.97 - $18.17
Q4 2015	31,944	$359	$13.45	$9.91 - $18.65
Q3 2015	32,469	$460	$20.12	$13.34 - $30.02
Q2 2015	18,884	$570	$31.90	$27.97 - $36.35
Q1 2015	16,742	$502	$29.80	$25.96 - $33.60
Q4 2014	24,368	$847	$31.49	$28.73 - $35.21
Q3 2014	24,369	$904	$39.92	$34.97 - $43.90
Q2 2014	23,330	$1,052	$38.68	$35.44 - $42.89
Q1 2014	47,041	$1,773	$31.60	$27.91 - $36.14
Q4 2013	48,835	$1,740	$30.74	$27.52 - $33.68
Q3 2013	48,493	$1,480	$26.04	$23.74 - $30.56
Q2 2013	24,604	$647	$26.04	$23.70 - $29.42