ATI INC - Common Stock (ATI) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
ATI on NYSE
Shares outstanding
138,756,298
Price per share
$114.76
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
128,756,533
Total reported value
$10,472,709,875
% of total 13F portfolios
0.01%
Share change
-5,044,636
Value change
-$450,808,840
Number of holders
462
Price from insider filings
$114.76
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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
Capital International Investors 13% +8.3% $1,434,712,580 +$68,175,121 17,638,463 +5% Capital International Investors 30 Sep 2025
VANGUARD GROUP INC 9.8% $747,172,811 13,895,719 The Vanguard Group 31 Mar 2025
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
FMR LLC 3.5% -32% $265,692,178 -$128,504,170 4,941,272 -33% FMR LLC 31 Mar 2025

As of 30 Sep 2025, 462 institutional investors reported holding 128,756,533 shares of ATI INC - Common Stock (ATI). This represents 93% of the company’s total 138,756,298 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of ATI INC - Common Stock (ATI) together control 70% 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% 17,147,559 +2.6% 0.23% $1,394,348,718
BlackRock, Inc. 11% 14,857,455 -0.6% 0.02% $1,208,505,389
VANGUARD GROUP INC 9.4% 13,054,247 -2.1% 0.02% $1,061,832,451
Capital World Investors 5.7% 7,900,572 +16% 0.09% $642,632,526
STATE STREET CORP 4.4% 6,042,244 +7.4% 0.02% $491,476,127
FMR LLC 3.5% 4,899,170 +44% 0.02% $398,498,467
Capital Research Global Investors 2.3% 3,224,970 0% 0.05% $262,319,060
Invesco Ltd. 2.3% 3,151,914 -4.4% 0.04% $256,376,713
D. E. Shaw & Co., Inc. 2.2% 3,027,102 -14% 0.2% $246,224,477
DENDUR CAPITAL LP 1.9% 2,689,160 -15% 24% $218,736,274
GEODE CAPITAL MANAGEMENT, LLC 1.8% 2,444,673 +0.36% 0.01% $198,887,479
DIMENSIONAL FUND ADVISORS LP 1.5% 2,142,000 +7.1% 0.04% $174,210,005
FRONTIER CAPITAL MANAGEMENT CO LLC 1.1% 1,554,561 -30% 1.1% $126,447,972
Holocene Advisors, LP 1.1% 1,534,114 +154% 0.29% $124,784,833
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.1% 1,511,283 +0.92% 0.02% $122,927,759
MORGAN STANLEY 1% 1,414,386 +17% 0.01% $115,046,319
AMERICAN CENTURY COMPANIES INC 0.99% 1,374,432 -0.84% 0.06% $111,796,498
BOWEN HANES & CO INC 0.96% 1,329,220 -3.4% 2.7% $108,118,755
AMERIPRISE FINANCIAL INC 0.95% 1,314,923 -38% 0.02% $106,955,837
ROYAL BANK OF CANADA 0.93% 1,284,686 +37% 0.02% $104,496,000
NORTHERN TRUST CORP 0.88% 1,226,747 -2.1% 0.01% $99,783,602
Channing Capital Management, LLC 0.8% 1,109,160 +34% 2.4% $90,219,074
PRICE T ROWE ASSOCIATES INC /MD/ 0.77% 1,074,149 -5.7% 0.01% $87,372,000
LOOMIS SAYLES & CO L P 0.73% 1,009,449 -2.9% 0.1% $82,108,581
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.71% 986,592 -1.1% 0.13% $80,246,860

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

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 294,502 $34,051,115 +$11,291,053 $114.76 25
2025 Q3 128,756,533 $10,472,709,875 -$450,808,840 $81.34 462
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