WELLINGTON MANAGEMENT GROUP LLP

Position in ATI — Ati Inc

CIK 902219 Boston, MA

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Position in ATI

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$11,017,867

-$32,287,735 QoQ

Shares Held

75,745

-79.9% QoQ

Ownership

0.056%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 0.ToString("F0")% Shared 78.537197174731.ToString("F0")% None 21.462802825268994.ToString("F0")%

Common Shares in ATI Over Time

Shares Held

Position Value (USD)

Position in Metal Fabrication

Industrials · as of Mar 31, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $152,865,488 across 4 Metal Fabrication names. ATI ranks #3 (7.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CRS	Carpenter Technology Corp	277,877	$109,525,218
2	CMC	COMMERCIAL METALS Co	369,887	$22,722,156
3	ATI	Ati Inc This page	75,745	$11,017,867
4	GPGI	GPGI, Inc.	561,418	$9,600,247

All Filings in ATI

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$11,017,867	75,745	-79.9%	Shares	Defined	2026-05-15
2025-12-31	$43,305,602	377,358	-17.5%	Shares	Defined	2026-02-17
2025-09-30	$37,196,780	457,300	-2.2%	Shares	Defined	2025-11-14
2025-06-30	$40,352,638	467,369	-9.8%	Shares	Defined	2025-08-14
2025-03-31	$26,961,580	518,193	+14.8%	Shares	Defined	2025-05-13
2024-12-31	$24,835,422	451,225	-19.5%	Shares	Defined	2025-02-12
2024-09-30	$37,517,172	560,711	+12.4%	Shares	Defined	2024-11-14
2024-06-30	$27,660,565	498,838	+23.0%	Shares	Defined	2024-08-14
2024-03-31	$20,755,113	405,611	+27.8%	Shares	Defined	2024-05-15
2023-12-31	$14,436,132	317,487	+6.6%	Shares	Defined	2024-02-12
2023-09-30	$12,255,209	297,818	-2.2%	Shares	Defined	2023-11-14
2023-06-30	$13,474,624	304,649	-6.6%	Shares	Defined	2023-08-14
2023-03-31	$12,872,009	326,204	+0.2%	Shares	Defined	2023-05-12
2022-12-31	$9,723,071	325,622	+6.8%	Shares	Defined	2023-02-13
2022-09-30	$8,112,616	304,871	+7.1%	Shares	Defined	2022-11-14
2022-06-30	$6,461,810	284,536	-0.8%	Shares	Defined	2022-08-15
2022-03-31	$7,702,274	286,970	-51.1%	Shares	Defined	2022-05-16
2021-12-31	$9,347,452	586,783	+5.9%	Shares	Defined	2022-02-11
2021-09-30	$9,218,024	554,301	-26.7%	Shares	Defined	2021-11-15
2021-06-30	$15,773,794	756,537	-0.7%	Shares	Defined	2021-08-16
2021-03-31	$16,037,968	761,537	-2.3%	Shares	Defined	2021-05-17
2020-12-31	$13,074,779	779,653	+74.9%	Shares	Defined	2021-02-12
2020-09-30	$3,887,470	445,811	-11.9%	Shares	Defined	2020-11-16
2020-06-30	$5,157,902	506,173	-0.9%	Shares	Defined	2020-08-14
2020-03-31	$4,339,861	510,572	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.