ATI INC (ATI) — Institutional Holders, Q2 2026

795 institutional investment managers reported a ATI position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $25.0B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← ATI stock profile

ATI in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

171

Added to

301

Trimmed

222

Sold out

Biggest buyers

BlackRockAdded · +2,267,269 sh+$446.9M
Qube Research & Technologies LtdAdded · +1,285,210 sh+$253.3M
BESSEMER GROUPNew · +954,983 sh+$188.2M
POLEN CAPITAL MANAGEMENTNew · +819,236 sh+$161.5M
PRICE T ROWE ASSOCIATESAdded · +693,067 sh+$136.6M

Biggest sellers

VIKING GLOBAL INVESTORSTrimmed · -2,178,963 sh-$429.5M
Capital International InvestorsTrimmed · -2,164,464 sh-$426.6M
Capital Research Global InvestorsTrimmed · -1,066,339 sh-$210.2M
UBS Group AGTrimmed · -954,362 sh-$188.1M
D. E. ShawTrimmed · -927,024 sh-$182.7M

ATI 13F holders ranked 1–100 of 795

Institutional investors reporting a position in ATI INC on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 18,708,922 sh	18,708,922	$3.7B	0.05%	+13.8%
2	VANGUARD PORTFOLIO MANAGEMENT#2 · 6,219,875 sh	6,219,875	$1.2B	0.06%	+6.8%
3	VANGUARD CAPITAL MANAGEMENT#3 · 6,162,418 sh	6,162,418	$1.2B	0.03%	+0.6%
4	Capital World Investors#4 · 5,249,249 sh	5,249,249	$1.0B	0.12%	-8.1%
5	STATE STREET#5 · 5,237,299 sh	5,237,299	$1.0B	0.03%	-2.7%
6	Capital Research Global Investors#6 · 5,093,768 sh	5,093,768	$1.0B	0.14%	-17.3%
7	FMR#7 · 4,989,171 sh	4,989,171	$983.4M	0.04%	-4.9%
8	Capital International Investors#8 · 3,719,485 sh	3,719,485	$733.2M	0.15%	-36.8%
9	Invesco Ltd.#9 · 3,449,291 sh	3,449,291	$679.9M	0.05%	-10.5%
10	GEODE CAPITAL MANAGEMENT#10 · 2,777,512 sh	2,777,512	$547.6M	0.03%	-5.8%
11	Qube Research & Technologies Ltd#11 · 2,144,028 sh	2,144,028	$422.6M	0.39%	+149.6%
12	MORGAN STANLEY#12 · 1,865,178 sh	1,865,178	$367.6M	0.02%	+11.8%
13	BANK OF AMERICA#13 · 1,767,047 sh	1,767,047	$348.3M	0.02%	+29.5%
14	NORGES BANK#14 · 1,739,884 sh	1,739,884	$342.9M	0.03%	—
15	CHARLES SCHWAB INVESTMENT MANAGEMENT#15 · 1,483,253 sh	1,483,253	$292.3M	0.04%	-1.3%
16	AQR CAPITAL MANAGEMENT#16 · 1,432,935 sh	1,432,935	$282.4M	0.10%	+17.2%
17	JANE STREET GROUP#17 · 1,410,930 sh	1,410,930	$278.1M	0.02%	-5.4%
18	NORTHERN#18 · 1,288,597 sh	1,288,597	$254.0M	0.03%	+4.0%
19	Point72 Asset Management, L.P.#19 · 1,240,348 sh	1,240,348	$244.5M	0.27%	-35.8%
20	DIMENSIONAL FUND ADVISORS#20 · 1,160,274 sh	1,160,274	$228.7M	0.04%	-15.1%
21	VIKING GLOBAL INVESTORS#21 · 1,153,880 sh	1,153,880	$227.4M	0.65%	-65.4%
22	MIRAE ASSET GLOBAL ETFS Ltd.#22 · 1,120,952 sh	1,120,952	$220.9M	0.26%	+8.5%
23	PRICE T ROWE ASSOCIATES#23 · 1,021,799 sh	1,021,799	$201.4M	0.02%	+210.8%
24	DENDUR CAPITAL#24 · 1,009,000 sh	1,009,000	$198.9M	10.44%	-21.4%
25	BESSEMER GROUP#25 · 954,983 sh	954,983	$188.2M	0.26%	New
26	BNP PARIBAS FINANCIAL MARKETS#26 · 922,903 sh	922,903	$181.9M	0.06%	+41.6%
27	VANGUARD FIDUCIARY#27 · 881,293 sh	881,293	$173.7M	0.04%	+4.4%
28	MILLENNIUM MANAGEMENT#28 · 875,260 sh	875,260	$172.5M	0.06%	+41.3%
29	Fisher Asset Management#29 · 872,372 sh	872,372	$171.9M	0.05%	-5.6%
30	AMERIPRISE FINANCIAL#30 · 858,201 sh	858,201	$169.2M	0.03%	-14.1%
31	Bank of New York Mellon#31 · 857,414 sh	857,414	$169.0M	0.03%	-1.4%
32	Artemis Investment Management LLP#32 · 841,493 sh	841,493	$165.9M	—	+16.6%
33	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#33 · 839,786 sh	839,786	$165.5M	0.07%	-30.2%
34	POLEN CAPITAL MANAGEMENT#34 · 819,236 sh	819,236	$161.5M	1.39%	New
35	D. E. Shaw#35 · 815,585 sh	815,585	$160.8M	0.08%	-53.2%
36	BOWEN HANES#36 · 1,043,105 sh	1,043,105	$151.7M	3.69%	0.0%
37	AMERICAN CENTURY COMPANIES#37 · 765,808 sh	765,808	$150.9M	0.07%	-28.4%
38	GOLDMAN SACHS GROUP#38 · 751,276 sh	751,276	$148.1M	0.01%	+67.8%
39	Nuveen#39 · 737,096 sh	737,096	$145.3M	0.03%	+27.4%
40	MARSHALL WACE, LLP#40 · 709,552 sh	709,552	$139.9M	0.11%	+32.3%
41	RAYMOND JAMES FINANCIAL#41 · 667,720 sh	667,720	$131.6M	0.04%	+4.5%
42	BARROW HANLEY MEWHINNEY & STRAUSS#42 · 658,413 sh	658,413	$129.8M	0.39%	-15.9%
43	Assenagon Asset Management S.A.#43 · 657,117 sh	657,117	$129.5M	—	+12.5%
44	TWO SIGMA INVESTMENTS#44 · 636,671 sh	636,671	$125.5M	0.09%	+3481.8%
45	Freestone Grove Partners#45 · 587,093 sh	587,093	$115.7M	0.74%	+1.9%
46	LOOMIS SAYLES & L P#46 · 581,326 sh	581,326	$114.6M	0.14%	-11.0%
47	BALYASNY ASSET MANAGEMENT L.P.#47 · 514,088 sh	514,088	$101.3M	0.13%	-39.6%
48	Holocene Advisors#48 · 497,600 sh	497,600	$98.1M	0.22%	-54.7%
49	CITADEL ADVISORS#49 · 497,418 sh	497,418	$98.0M	0.01%	+64.0%
50	SG Americas Securities#50 · 489,505 sh	489,505	$96.5M	0.05%	-54.5%
51	Allspring Global Investments#51 · 502,038 sh	502,038	$96.5M	0.15%	-3.5%
52	WELLS FARGO & COMPANY#52 · 483,681 sh	483,681	$95.3M	0.02%	+37.7%
53	FEDERATED HERMES#53 · 474,180 sh	474,180	$93.5M	0.13%	-13.1%
54	JPMORGAN CHASE#54 · 465,592 sh	465,592	$93.3M	<0.01%	+14.3%
55	UBS Group AG#55 · 464,718 sh	464,718	$91.6M	0.01%	-67.3%
56	1832 Asset Management L.P.#56 · 459,483 sh	459,483	$90.6M	0.05%	+203.3%
57	Neuberger Berman Group#57 · 450,261 sh	450,261	$88.7M	0.06%	-9.0%
58	Square Wave Capital#58 · 444,800 sh	444,800	$87.7M	13.08%	+21.4%
59	DSM CAPITAL PARTNERS#59 · 441,048 sh	441,048	$86.9M	1.49%	New
60	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#60 · 428,271 sh	428,271	$84.4M	0.02%	+20.7%
61	FRONTIER CAPITAL MANAGEMENT#61 · 419,968 sh	419,968	$82.8M	0.77%	-39.5%
62	BANK OF NOVA SCOTIA#62 · 417,290 sh	417,290	$82.2M	0.12%	-10.7%
63	ENVESTNET ASSET MANAGEMENT#63 · 391,409 sh	391,409	$77.1M	0.02%	+81.4%
64	Amundi#64 · 388,616 sh	388,616	$76.6M	0.02%	+48.8%
65	ALLIANCEBERNSTEIN L.P.#65 · 522,371 sh	522,371	$76.0M	0.03%	-9.2%
66	RHUMBLINE ADVISERS#66 · 376,589 sh	376,589	$74.2M	0.06%	+6.3%
67	GAMCO INVESTORS, ET AL#67 · 358,000 sh	358,000	$70.6M	0.63%	-1.0%
68	THRIVENT FINANCIAL FOR LUTHERANS#68 · 338,645 sh	338,645	$66.7M	0.11%	+571.9%
69	ING GROEP NV#69 · 330,300 sh	330,300	$65.1M	0.32%	-12.5%
70	CANADA PENSION PLAN INVESTMENT BOARD#70 · 321,526 sh	321,526	$63.4M	0.04%	+91.7%
71	PRINCIPAL FINANCIAL GROUP#71 · 308,372 sh	308,372	$60.8M	0.03%	+1.7%
72	Retirement Systems of Alabama#72 · 286,874 sh	286,874	$56.5M	0.17%	-8.1%
73	Clearbridge Investments#73 · 280,386 sh	280,386	$55.3M	0.05%	New
74	Swiss National Bank#74 · 276,400 sh	276,400	$54.5M	0.03%	+2.8%
75	Gotham Asset Management#75 · 269,572 sh	269,572	$53.1M	0.12%	+3.5%
76	VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.#76 · 269,170 sh	269,170	$53.1M	0.47%	-29.6%
77	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM#77 · 258,900 sh	258,900	$51.0M	0.03%	+2.0%
78	SEGALL BRYANT & HAMILL#78 · 242,639 sh	242,639	$47.8M	0.57%	-30.7%
79	ROYAL BANK OF CANADA#79 · 240,438 sh	240,438	$47.4M	<0.01%	+40.6%
80	BLAIR WILLIAM#80 · 231,946 sh	231,946	$45.7M	0.12%	-2.1%
81	Capital International#81 · 210,648 sh	210,648	$41.5M	0.29%	-10.3%
82	SCHRODER INVESTMENT MANAGEMENT GROUP#82 · 207,874 sh	207,874	$41.1M	0.03%	-48.4%
83	KLCM Advisors#83 · 207,475 sh	207,475	$40.9M	3.22%	-21.1%
84	LPL Financial#84 · 205,781 sh	205,781	$40.6M	<0.01%	+24.3%
85	DRIEHAUS CAPITAL MANAGEMENT#85 · 205,124 sh	205,124	$40.4M	0.23%	-3.6%
86	HAWK RIDGE CAPITAL MANAGEMENT#86 · 204,700 sh	204,700	$40.3M	1.29%	+10.3%
87	JUPITER ASSET MANAGEMENT LTD#87 · 202,574 sh	202,574	$39.9M	0.20%	-40.7%
88	Legal & General Group Plc#88 · 199,420 sh	199,420	$39.3M	<0.01%	-5.9%
89	Allianz Asset Management GmbH#89 · 268,032 sh	268,032	$39.2M	0.04%	+0.1%
90	CITIGROUP#90 · 192,174 sh	192,174	$37.9M	0.01%	+154.1%
91	PANAGORA ASSET MANAGEMENT#91 · 188,522 sh	188,522	$37.2M	0.11%	+13.9%
92	PRUDENTIAL FINANCIAL#92 · 181,276 sh	181,276	$35.7M	0.04%	-77.6%
93	Rokos Capital Management LLP#93 · 180,935 sh	180,935	$35.7M	0.13%	+125.2%
94	Yaupon Capital Management#94 · 180,204 sh	180,204	$35.5M	0.70%	New
95	HEALTHCARE OF ONTARIO PENSION PLAN FUND#95 · 178,880 sh	178,880	$35.3M	0.05%	+105.5%
96	SUSQUEHANNA INTERNATIONAL GROUP, LLP#96 · 178,268 sh	178,268	$35.1M	<0.01%	+404.3%
97	Schonfeld Strategic Advisors#97 · 177,751 sh	177,751	$35.0M	0.13%	+655.0%
98	STATE OF WISCONSIN INVESTMENT BOARD#98 · 174,589 sh	174,589	$34.4M	0.07%	-13.6%
99	DEUTSCHE BANK AG\#99 · 162,592 sh	162,592	$32.0M	<0.01%	+50.7%
100	Voleon Capital Management#100 · 154,311 sh	154,311	$30.4M	0.55%	+56.0%

Funds that sold out of ATI in Q2 2026 (54)

Held ATI at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held ATI in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
NOMURA ASSET MANAGEMENT INTERNATIONAL117,121 sh	117,121	$17.0M
EMERALD MUTUAL FUND ADVISERS93,847 sh	93,847	$13.7M
Woodline Partners89,389 sh	89,389	$13.0M
Anomaly Capital Management74,830 sh	74,830	$10.9M
Qsemble Capital Management42,008 sh	42,008	$6.1M
Freemont Management S.A.27,300 sh	27,300	$4.0M
Sciencast Management17,329 sh	17,329	$2.5M
Donoghue Forlines16,225 sh	16,225	$2.4M
AIGEN INVESTMENT MANAGEMENT14,063 sh	14,063	$2.0M
LEUCADIA NATIONAL11,571 sh	11,571	$1.7M
ADAGE CAPITAL PARTNERS GP, L.L.C.10,468 sh	10,468	$1.5M
Dayah Capital9,842 sh	9,842	$1.4M
PEAK69,208 sh	9,208	$1.3M
Integrated Quantitative Investments8,735 sh	8,735	$1.3M
Friedenthal Financial6,741 sh	6,741	$980.5K
Fairvoy Private Wealth6,043 sh	6,043	$879.0K
ARISTEIA CAPITAL, L.L.C.3,292 sh	3,292	$478.9K
Cynosure Management2,749 sh	2,749	$399.9K
Scientech Research2,215 sh	2,215	$322.2K
Carnegie Investment Counsel2,136 sh	2,136	$310.7K
SIG BROKERAGE2,102 sh	2,102	$305.8K
FORA Capital1,768 sh	1,768	$257.2K
Annex Advisory Services1,763 sh	1,763	$256.4K
DV Trading1,600 sh	1,600	$232.7K
Advisor OS1,595 sh	1,595	$232.0K
INCEPTIONR1,546 sh	1,546	$224.9K
EVOLVE PRIVATE WEALTH1,481 sh	1,481	$215.4K
PRELUDE CAPITAL MANAGEMENT1,427 sh	1,427	$207.6K
HORAN Wealth1,400 sh	1,400	$203.6K
Optiver Holding B.V.1,226 sh	1,226	$178.3K
CFG Wealth Management Services720 sh	720	$104.7K
SUMMIT SECURITIES GROUP413 sh	413	$60.1K
Aster Capital Management (DIFC) Ltd866 sh	866	$45.1K
Destiny Wealth Partners265 sh	265	$38.5K
Itau Unibanco Holding S.A.246 sh	246	$28.2K
Ancora Advisors178 sh	178	$25.9K
TWIN PEAKS WEALTH ADVISORS131 sh	131	$19.1K
First Command Advisory Services110 sh	110	$16.0K
CHILTON CAPITAL MANAGEMENT109 sh	109	$15.9K
Wealth Preservation Advisors101 sh	101	$14.7K
Wall Street Financial Group87 sh	87	$12.7K
Longview Financial Advisors48 sh	48	$7.0K
Golden State Equity Partners42 sh	42	$6.1K
Legacy Wealth Managment32 sh	32	$4.7K
Annis Gardner Whiting Capital Advisors24 sh	24	$3.5K
Clarity Asset Management11 sh	11	$1.6K
Vermillion Wealth Management10 sh	10	$1.5K
Harvest Fund Management , Ltd6 sh	6	$1.0K
Intentional Wealth Strategies4 sh	4	$582.00
Murphy & Mullick Capital Management3 sh	3	$436.00
CURIO WEALTH3 sh	3	$436.00
Kentucky Retirement Systems8,915 sh	8,915	$318.00
Kilter Group1 sh	1	$146.00
Elequin Securities46 sh	46	—

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.