ALLEGHENY TECHNOLOGIES INC

Ticker: ATI CUSIP: 01741R102 Class: EQTY

EMERALD ADVISERS, LLC's Holding History (CIK: 0001015083)

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

Q4 2025

Shares 307,552 Value ($000) $35,295 Avg Close $97.45 Range $79.29 - $117.48

Q3 2025

Shares 313,088 Value ($000) $25,467 Avg Close $81.04 Range $70.42 - $96.20

Q2 2025

Shares 318,863 Value ($000) $27,531 Avg Close $68.45 Range $39.23 - $87.75

Q1 2025

Shares 587,250 Value ($000) $30,555 Avg Close $56.77 Range $49.07 - $66.80

Q4 2024

Shares 602,039 Value ($000) $33,136 Avg Close $58.97 Range $52.45 - $67.09

Q3 2024

Shares 637,468 Value ($000) $42,653 Avg Close $62.09 Range $53.90 - $68.92

Q2 2024

Shares 640,388 Value ($000) $35,510 Avg Close $56.03 Range $47.90 - $62.44

Q1 2024

Shares 708,860 Value ($000) $36,272 Avg Close $45.22 Range $38.04 - $51.95

Q4 2023

Shares 557,389 Value ($000) $25,344 Avg Close $41.52 Range $35.03 - $46.57

Q3 2023

Shares 558,505 Value ($000) $22,982 Avg Close $44.44 Range $41.04 - $47.92

Q2 2023

Shares 555,600 Value ($000) $24,574 Avg Close $38.25 Range $34.10 - $44.39

Q4 2022

Shares 2,920 Value ($000) $87 Avg Close $29.27 Range $25.39 - $31.74

Q3 2022

Shares 2,920 Value ($000) $78 Avg Close $27.84 Range $20.52 - $33.31

Q2 2022

Shares 3,810 Value ($000) $87 Avg Close $26.35 Range $20.87 - $30.74

Q1 2022

Shares 3,810 Value ($000) $102 Avg Close $23.18 Range $16.02 - $28.45

Q4 2021

Shares 5,610 Value ($000) $89 Avg Close $16.05 Range $13.85 - $18.33

Q2 2021

Shares 6,310 Value ($000) $132 Avg Close $22.93 Range $20.15 - $25.04

Q1 2019

Shares 577,795 Value ($000) $14,774 Avg Close $26.33 Range $21.00 - $29.50

Q4 2018

Shares 581,266 Value ($000) $12,654 Avg Close $25.93 Range $20.84 - $29.84

Q3 2018

Shares 544,796 Value ($000) $16,099 Avg Close $26.89 Range $24.31 - $30.18

Q2 2018

Shares 549,860 Value ($000) $13,812 Avg Close $27.05 Range $22.93 - $29.87

Q1 2018

Shares 555,300 Value ($000) $13,150 Avg Close $26.83 Range $22.70 - $30.25

Q4 2017

Shares 941,793 Value ($000) $22,735 Avg Close $23.80 Range $21.01 - $26.59

Q3 2017

Shares 323,733 Value ($000) $7,737 Avg Close $19.78 Range $16.51 - $24.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	307,552	$35,295	$97.45	$79.29 - $117.48
Q3 2025	313,088	$25,467	$81.04	$70.42 - $96.20
Q2 2025	318,863	$27,531	$68.45	$39.23 - $87.75
Q1 2025	587,250	$30,555	$56.77	$49.07 - $66.80
Q4 2024	602,039	$33,136	$58.97	$52.45 - $67.09
Q3 2024	637,468	$42,653	$62.09	$53.90 - $68.92
Q2 2024	640,388	$35,510	$56.03	$47.90 - $62.44
Q1 2024	708,860	$36,272	$45.22	$38.04 - $51.95
Q4 2023	557,389	$25,344	$41.52	$35.03 - $46.57
Q3 2023	558,505	$22,982	$44.44	$41.04 - $47.92
Q2 2023	555,600	$24,574	$38.25	$34.10 - $44.39
Q4 2022	2,920	$87	$29.27	$25.39 - $31.74
Q3 2022	2,920	$78	$27.84	$20.52 - $33.31
Q2 2022	3,810	$87	$26.35	$20.87 - $30.74
Q1 2022	3,810	$102	$23.18	$16.02 - $28.45
Q4 2021	5,610	$89	$16.05	$13.85 - $18.33
Q2 2021	6,310	$132	$22.93	$20.15 - $25.04
Q1 2019	577,795	$14,774	$26.33	$21.00 - $29.50
Q4 2018	581,266	$12,654	$25.93	$20.84 - $29.84
Q3 2018	544,796	$16,099	$26.89	$24.31 - $30.18
Q2 2018	549,860	$13,812	$27.05	$22.93 - $29.87
Q1 2018	555,300	$13,150	$26.83	$22.70 - $30.25
Q4 2017	941,793	$22,735	$23.80	$21.01 - $26.59
Q3 2017	323,733	$7,737	$19.78	$16.51 - $24.00