ALLEGHENY TECHNOLOGIES INC

Ticker: ATI CUSIP: 01741R102 Class: EQTY

PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO's Holding History (CIK: 0000315297)

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

Q4 2025

Shares 13,019 Value ($000) $1 Avg Close $97.45 Range $79.29 - $117.48

Q3 2025

Shares 13,019 Value ($000) $1 Avg Close $81.04 Range $70.42 - $96.20

Q2 2025

Shares 13,019 Value ($000) $1 Avg Close $68.45 Range $39.23 - $87.75

Q1 2025

Shares 13,019 Value ($000) $1 Avg Close $56.77 Range $49.07 - $66.80

Q4 2024

Shares 13,019 Value ($000) $1 Avg Close $58.97 Range $52.45 - $67.09

Q3 2024

Shares 14,350 Value ($000) $1 Avg Close $62.09 Range $53.90 - $68.92

Q2 2024

Shares 14,350 Value ($000) $1 Avg Close $56.03 Range $47.90 - $62.44

Q1 2024

Shares 14,900 Value ($000) $1 Avg Close $45.22 Range $38.04 - $51.95

Q4 2023

Shares 17,374 Value ($000) $1 Avg Close $41.52 Range $35.03 - $46.57

Q3 2023

Shares 17,579 Value ($000) $1 Avg Close $44.44 Range $41.04 - $47.92

Q2 2023

Shares 18,936 Value ($000) $1 Avg Close $38.25 Range $34.10 - $44.39

Q1 2023

Shares 18,936 Value ($000) $1 Avg Close $37.76 Range $29.37 - $43.32

Q4 2022

Shares 18,936 Value ($000) $1 Avg Close $29.27 Range $25.39 - $31.74

Q3 2022

Shares 18,936 Value ($000) $504 Avg Close $27.84 Range $20.52 - $33.31

Q2 2022

Shares 18,936 Value ($000) $430 Avg Close $26.35 Range $20.87 - $30.74

Q1 2022

Shares 18,936 Value ($000) $508 Avg Close $23.18 Range $16.02 - $28.45

Q4 2021

Shares 18,936 Value ($000) $302 Avg Close $16.05 Range $13.85 - $18.33

Q3 2021

Shares 18,936 Value ($000) $315 Avg Close $18.91 Range $15.75 - $22.33

Q2 2021

Shares 18,936 Value ($000) $395 Avg Close $22.93 Range $20.15 - $25.04

Q1 2021

Shares 18,936 Value ($000) $399 Avg Close $19.55 Range $15.97 - $22.87

Q4 2020

Shares 18,936 Value ($000) $318 Avg Close $12.70 Range $8.24 - $17.60

Q3 2020

Shares 18,936 Value ($000) $165 Avg Close $9.20 Range $8.04 - $11.06

Q2 2020

Shares 18,936 Value ($000) $193 Avg Close $8.67 Range $6.21 - $12.60

Q1 2020

Shares 18,936 Value ($000) $161 Avg Close $15.97 Range $4.95 - $20.91

Q4 2019

Shares 17,639 Value ($000) $364 Avg Close $21.68 Range $18.98 - $24.17

Q3 2019

Shares 17,639 Value ($000) $357 Avg Close $21.15 Range $17.03 - $25.66

Q2 2019

Shares 17,639 Value ($000) $445 Avg Close $24.37 Range $21.15 - $27.49

Q1 2019

Shares 17,639 Value ($000) $451 Avg Close $26.33 Range $21.00 - $29.50

Q4 2018

Shares 17,639 Value ($000) $384 Avg Close $25.93 Range $20.84 - $29.84

Q3 2018

Shares 17,639 Value ($000) $521 Avg Close $26.89 Range $24.31 - $30.18

Q2 2018

Shares 17,639 Value ($000) $443 Avg Close $27.05 Range $22.93 - $29.87

Q1 2018

Shares 17,639 Value ($000) $418 Avg Close $26.83 Range $22.70 - $30.25

Q4 2017

Shares 17,639 Value ($000) $426 Avg Close $23.80 Range $21.01 - $26.59

Q3 2017

Shares 17,639 Value ($000) $422 Avg Close $19.78 Range $16.51 - $24.00

Q2 2017

Shares 17,639 Value ($000) $300 Avg Close $16.82 Range $14.54 - $20.11

Q1 2017

Shares 17,639 Value ($000) $317 Avg Close $18.80 Range $15.61 - $23.69

Q4 2016

Shares 17,639 Value ($000) $281 Avg Close $16.62 Range $13.15 - $19.20

Q3 2016

Shares 17,639 Value ($000) $319 Avg Close $16.54 Range $12.22 - $18.59

Q2 2016

Shares 20,287 Value ($000) $259 Avg Close $14.18 Range $10.81 - $17.83

Q1 2016

Shares 27,295 Value ($000) $445 Avg Close $12.00 Range $6.97 - $18.17

Q4 2015

Shares 27,301 Value ($000) $307 Avg Close $13.45 Range $9.91 - $18.65

Q3 2015

Shares 27,270 Value ($000) $387 Avg Close $20.12 Range $13.34 - $30.02

Q2 2015

Shares 28,139 Value ($000) $850 Avg Close $31.90 Range $27.97 - $36.35

Q1 2015

Shares 28,901 Value ($000) $867 Avg Close $29.80 Range $25.96 - $33.60

Q4 2014

Shares 28,813 Value ($000) $1,002 Avg Close $31.49 Range $28.73 - $35.21

Q3 2014

Shares 28,873 Value ($000) $1,071 Avg Close $39.92 Range $34.97 - $43.90

Q2 2014

Shares 32,164 Value ($000) $1,451 Avg Close $38.68 Range $35.44 - $42.89

Q1 2014

Shares 33,636 Value ($000) $1,267 Avg Close $31.60 Range $27.91 - $36.14

Q4 2013

Shares 33,649 Value ($000) $1,199 Avg Close $30.74 Range $27.52 - $33.68

Q3 2013

Shares 33,597 Value ($000) $1,025 Avg Close $26.04 Range $23.74 - $30.56

Q2 2013

Shares 33,597 Value ($000) $884 Avg Close $26.04 Range $23.70 - $29.42

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	13,019	$1	$97.45	$79.29 - $117.48
Q3 2025	13,019	$1	$81.04	$70.42 - $96.20
Q2 2025	13,019	$1	$68.45	$39.23 - $87.75
Q1 2025	13,019	$1	$56.77	$49.07 - $66.80
Q4 2024	13,019	$1	$58.97	$52.45 - $67.09
Q3 2024	14,350	$1	$62.09	$53.90 - $68.92
Q2 2024	14,350	$1	$56.03	$47.90 - $62.44
Q1 2024	14,900	$1	$45.22	$38.04 - $51.95
Q4 2023	17,374	$1	$41.52	$35.03 - $46.57
Q3 2023	17,579	$1	$44.44	$41.04 - $47.92
Q2 2023	18,936	$1	$38.25	$34.10 - $44.39
Q1 2023	18,936	$1	$37.76	$29.37 - $43.32
Q4 2022	18,936	$1	$29.27	$25.39 - $31.74
Q3 2022	18,936	$504	$27.84	$20.52 - $33.31
Q2 2022	18,936	$430	$26.35	$20.87 - $30.74
Q1 2022	18,936	$508	$23.18	$16.02 - $28.45
Q4 2021	18,936	$302	$16.05	$13.85 - $18.33
Q3 2021	18,936	$315	$18.91	$15.75 - $22.33
Q2 2021	18,936	$395	$22.93	$20.15 - $25.04
Q1 2021	18,936	$399	$19.55	$15.97 - $22.87
Q4 2020	18,936	$318	$12.70	$8.24 - $17.60
Q3 2020	18,936	$165	$9.20	$8.04 - $11.06
Q2 2020	18,936	$193	$8.67	$6.21 - $12.60
Q1 2020	18,936	$161	$15.97	$4.95 - $20.91
Q4 2019	17,639	$364	$21.68	$18.98 - $24.17
Q3 2019	17,639	$357	$21.15	$17.03 - $25.66
Q2 2019	17,639	$445	$24.37	$21.15 - $27.49
Q1 2019	17,639	$451	$26.33	$21.00 - $29.50
Q4 2018	17,639	$384	$25.93	$20.84 - $29.84
Q3 2018	17,639	$521	$26.89	$24.31 - $30.18
Q2 2018	17,639	$443	$27.05	$22.93 - $29.87
Q1 2018	17,639	$418	$26.83	$22.70 - $30.25
Q4 2017	17,639	$426	$23.80	$21.01 - $26.59
Q3 2017	17,639	$422	$19.78	$16.51 - $24.00
Q2 2017	17,639	$300	$16.82	$14.54 - $20.11
Q1 2017	17,639	$317	$18.80	$15.61 - $23.69
Q4 2016	17,639	$281	$16.62	$13.15 - $19.20
Q3 2016	17,639	$319	$16.54	$12.22 - $18.59
Q2 2016	20,287	$259	$14.18	$10.81 - $17.83
Q1 2016	27,295	$445	$12.00	$6.97 - $18.17
Q4 2015	27,301	$307	$13.45	$9.91 - $18.65
Q3 2015	27,270	$387	$20.12	$13.34 - $30.02
Q2 2015	28,139	$850	$31.90	$27.97 - $36.35
Q1 2015	28,901	$867	$29.80	$25.96 - $33.60
Q4 2014	28,813	$1,002	$31.49	$28.73 - $35.21
Q3 2014	28,873	$1,071	$39.92	$34.97 - $43.90
Q2 2014	32,164	$1,451	$38.68	$35.44 - $42.89
Q1 2014	33,636	$1,267	$31.60	$27.91 - $36.14
Q4 2013	33,649	$1,199	$30.74	$27.52 - $33.68
Q3 2013	33,597	$1,025	$26.04	$23.74 - $30.56
Q2 2013	33,597	$884	$26.04	$23.70 - $29.42