Security Snapshot

ATI INC - Common Stock (ATI) Institutional Ownership

CUSIP: 01741R102

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

565

Shares (Excl. Options)

128,279,477

Price

$114.76

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Type / Class
Equity / Common Stock
Symbol
ATI on NYSE
Shares outstanding
137,099,556
Price per share
$145.46
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
128,279,477
Total reported value
$14,726,262,706
% of total 13F portfolios
0.01%
Share change
-651,923
Value change
+$16,670,557
Number of holders
565
Price from insider filings
$145.46
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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Quick Takeaways

  • ATI - ATI INC - Common Stock is tracked under CUSIP 01741R102.
  • 565 institutions reported positions in Q4 2025.
  • 4 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 565 to 38 between Q4 2025 and Q1 2026.
  • Reported value moved from $14,726,262,706 to $140,188,218.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 565 institutions filings for Q4 2025.

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Investment Quick Answers

What is CUSIP 01741R102?
CUSIP 01741R102 identifies ATI - ATI INC - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of ATI INC - Common Stock (ATI) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 10% +2% $1,078,405,219 -$1,700,640 13,891,604 -0.16% BlackRock, Inc. 30 Sep 2025
Capital World Investors 5.7% $643,326,926 7,909,109 Capital World Investors 30 Sep 2025
Capital International Investors 4.5% -64% $897,410,093 -$1,668,273,680 6,169,480 -65% Capital International Investors 31 Mar 2026
FMR LLC 3.5% -32% $265,692,178 -$128,504,170 4,941,272 -33% FMR LLC 31 Mar 2025

As of 31 Dec 2025, 565 institutional investors reported holding 128,279,477 shares of ATI INC - Common Stock (ATI). This represents 94% of the company’s total 137,099,556 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of ATI INC - Common Stock (ATI) together control 69% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Capital International Investors 12% 17,095,803 -0.3% 0.31% $1,962,203,591
BlackRock, Inc. 11% 14,666,770 -1.3% 0.03% $1,683,158,523
VANGUARD GROUP INC 9.3% 12,726,524 -2.5% 0.02% $1,460,495,894
Capital World Investors 5.4% 7,355,793 -6.9% 0.11% $844,150,805
STATE STREET CORP 4.1% 5,599,233 -7.3% 0.02% $642,567,979
FMR LLC 3.7% 5,074,824 +3.6% 0.03% $582,386,731
Capital Research Global Investors 2.6% 3,611,724 +12% 0.08% $414,481,446
Invesco Ltd. 2.5% 3,384,924 +7.4% 0.06% $388,453,915
GEODE CAPITAL MANAGEMENT, LLC 1.8% 2,419,168 -1% 0.02% $277,682,512
DIMENSIONAL FUND ADVISORS LP 1.6% 2,125,976 -0.75% 0.05% $243,988,688
DENDUR CAPITAL LP 1.5% 2,039,291 -24% 24% $234,029,035
D. E. Shaw & Co., Inc. 1.5% 2,022,621 -33% 0.18% $232,115,986
NORGES BANK 1.3% 1,732,195 0.02% $198,786,698
AMERICAN CENTURY COMPANIES INC 1.2% 1,590,017 +16% 0.09% $182,470,664
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.1% 1,487,892 -1.5% 0.03% $170,750,486
MORGAN STANLEY 0.94% 1,283,539 -9.3% 0.01% $147,299,204
AMERIPRISE FINANCIAL INC 0.91% 1,244,248 -5.4% 0.03% $142,789,900
FRONTIER CAPITAL MANAGEMENT CO LLC 0.9% 1,227,453 -21% 1.5% $140,862,463
UBS Group AG 0.87% 1,193,129 +143% 0.03% $136,923,485
BOWEN HANES & CO INC 0.86% 1,177,705 -11% 3.4% $135,153,000
NORTHERN TRUST CORP 0.86% 1,174,117 -4.3% 0.02% $134,741,667
Holocene Advisors, LP 0.78% 1,071,745 -30% 0.26% $122,993,456
AQR CAPITAL MANAGEMENT LLC 0.74% 1,019,840 +685% 0.06% $117,036,862
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.74% 1,007,959 +2.2% 0.17% $115,675,207
LOOMIS SAYLES & CO L P 0.68% 935,673 -7.3% 0.13% $107,377,834

Institutional Holders of ATI INC - Common Stock (ATI) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 965,672 $140,188,218 +$73,293,283 $145.46 38
2025 Q4 128,279,477 $14,726,262,706 +$16,670,557 $114.76 565
2025 Q3 128,761,297 $10,473,097,363 -$444,728,900 $81.34 467
2025 Q2 134,063,276 $11,564,420,309 +$170,389,439 $86.34 467
2025 Q1 132,651,028 $6,896,324,529 -$214,670,103 $52.03 423
2024 Q4 136,430,673 $7,509,391,637 +$126,872,028 $55.04 401
2024 Q3 132,940,202 $8,887,213,273 +$42,945,099 $66.91 421
2024 Q2 132,292,912 $7,335,869,816 -$130,486,390 $55.45 403
2024 Q1 133,908,614 $6,851,994,578 +$36,303,923 $51.17 343
2023 Q4 134,229,495 $6,103,395,291 +$63,005,369 $45.47 345
2023 Q3 133,170,498 $5,480,251,328 -$58,136,118 $41.15 336
2023 Q2 134,529,963 $5,949,753,318 +$40,671,129 $44.23 326
2023 Q1 133,923,983 $5,284,501,188 +$74,895,368 $39.46 335
2022 Q4 132,384,495 $3,953,815,393 -$21,139,353 $29.86 300
2022 Q3 131,275,526 $3,493,922,927 -$50,969,425 $26.61 279
2022 Q2 132,796,735 $3,016,791,707 +$52,724,567 $22.71 256
2022 Q1 130,648,661 $3,507,680,455 -$6,169,936 $26.84 278
2021 Q4 131,629,933 $2,096,171,701 -$22,117,892 $15.93 229
2021 Q3 132,777,336 $2,208,300,713 -$3,372,398 $16.63 228
2021 Q2 132,617,558 $2,764,614,928 +$75,551,811 $20.85 230
2021 Q1 128,980,577 $2,716,895,617 +$104,060,105 $21.06 226
2020 Q4 124,604,673 $2,090,113,386 +$59,717,281 $16.77 228
2020 Q3 121,677,134 $1,061,369,289 +$35,687,995 $8.72 212
2020 Q2 117,181,834 $1,194,191,725 -$37,822,142 $10.19 237
2020 Q1 121,654,685 $1,033,993,354 -$202,700,020 $8.50 244
2019 Q4 133,170,423 $2,749,957,752 +$44,328,701 $20.66 277
2019 Q3 130,665,473 $2,646,018,374 -$106,952,557 $20.25 268
2019 Q2 135,647,278 $3,418,278,900 +$64,383,016 $25.20 280
2019 Q1 135,829,501 $3,474,485,743 +$67,180,707 $25.57 304
2018 Q4 136,300,064 $2,967,619,455 +$20,985,977 $21.77 273
2018 Q3 133,735,655 $3,951,681,146 +$12,030,612 $29.55 290
2018 Q2 134,126,344 $3,369,497,583 +$131,408,573 $25.12 286
2018 Q1 129,128,601 $3,058,074,075 -$37,686,282 $23.68 292
2017 Q4 130,660,546 $3,154,889,611 +$256,403,218 $24.14 290
2017 Q3 119,554,565 $2,857,256,654 -$17,082,282 $23.90 257
2017 Q2 121,030,977 $2,058,773,100 +$85,013,559 $17.01 236
2017 Q1 115,619,958 $2,076,624,512 +$386,388,025 $17.96 230
2016 Q4 105,250,422 $1,676,962,990 +$79,236,594 $15.93 228
2016 Q3 100,856,952 $1,821,747,819 -$39,948,452 $18.07 224
2016 Q2 104,669,590 $1,334,438,499 +$187,989,339 $12.75 213
2016 Q1 89,458,964 $1,457,409,698 -$6,882,038 $16.30 218
2015 Q4 90,912,500 $1,022,664,904 +$20,867,969 $11.25 233
2015 Q3 89,338,346 $1,266,962,393 -$111,003,318 $14.18 234
2015 Q2 87,812,512 $2,651,974,079 +$39,579,386 $30.20 291
2015 Q1 83,983,170 $2,521,077,539 -$77,866,101 $30.01 278
2014 Q4 86,077,143 $2,991,991,177 -$15,770,628 $34.77 288
2014 Q3 86,050,710 $3,192,554,670 -$45,122,876 $37.10 313
2014 Q2 86,773,130 $3,916,956,457 +$130,830,189 $45.10 307
2014 Q1 84,441,310 $3,182,178,410 +$65,363,694 $37.68 290

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