Driehaus Capital Management LLC

Position in ATI — Ati Inc

CIK 938206 Chicago, IL

Position in ATI

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$40,429,940

+$9,485,653 QoQ

Shares Held

205,124

-3.6% QoQ

Ownership

0.151%

of shares outstanding

% of Portfolio

0.24%

of 13F equity value

Holder Rank

#86

of 787 holders

Holding Since

Mar 2022

13 quarters on record

Voting authority Sole 99% Shared 0% None 1%

Industrials · as of Jun 30, 2026

Driehaus Capital Management LLC holds $242,453,266 across 4 Metal Fabrication names. ATI ranks #2 (16.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CRS	Carpenter Technology Corp	227,203	$140,147,898
2	ATI	Ati Inc This page	205,124	$40,429,940
3	MEC	Mayville Engineering Company, Inc.	846,354	$31,704,420
4	PRLB	Proto Labs Inc	370,151	$30,171,008

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$40,429,940	205,124	-3.6%	Shares	Sole	2026-08-14
2026-03-31	$30,944,287	212,734	-0.2%	Shares	Sole	2026-05-15
2025-12-31	$24,456,618	213,111	-73.9%	Shares	Sole	2026-02-17
2024-09-30	$54,644,727	816,690	+56.7%	Shares	Sole	2024-11-14
2024-06-30	$28,895,993	521,118	-66.3%	Shares	Sole	2024-08-15
2023-12-31	$70,403,610	1,548,353	-28.5%	Shares	Sole	2024-02-14
2023-09-30	$89,163,984	2,166,804	+0.2%	Shares	Sole	2023-11-14
2023-06-30	$95,625,746	2,162,011	-0.1%	Shares	Sole	2023-08-14
2023-03-31	$85,439,383	2,165,215	+4.5%	Shares	Sole	2023-05-15
2022-12-31	$61,866,754	2,071,894	-8.6%	Shares	Sole	2023-02-14
2022-09-30	$60,311,272	2,266,489	-4.7%	Shares	Sole	2022-11-14
2022-06-30	$53,986,075	2,377,194	+24.6%	Shares	Sole	2022-08-15
2022-03-31	$51,202,855	1,907,707	—	Shares	Sole	2022-05-16
No filing history on record for this holder in this stock.