Optiver Holding B.V.

Position in ATI — Ati Inc

CIK 1859606 AMSTERDAM, P7

Position in ATI

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

Position Value

$178,333

+$108,056 QoQ

Shares Held

1,226

+41.9% QoQ

Ownership

0.001%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2024

5 quarters on record

Voting authority Sole 0% Shared 100% None 0%

Industrials · as of Jun 30, 2026

Optiver Holding B.V. holds $111,568 across 7 Metal Fabrication names.

#	Ticker	Company	Shares	Value (USD)
1	CMC	COMMERCIAL METALS Co	1,073	$67,330
2	GPGI	GPGI, Inc.	1,133	$17,958
3	MLI	Mueller Industries Inc	142	$8,728
4	PRLB	Proto Labs Inc	103	$8,395
5	WOR	Worthington Enterprises, Inc.	147	$7,902
6	IIIN	Insteel Industries Inc	40	$1,208
7	TG	Tredegar Corp	6	$47

5 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$178,333	1,226	+41.9%	Shares	Defined	2026-05-15
2025-09-30	$70,277	864	+274.0%	Shares	Defined	2025-11-10
2025-06-30	$19,944	231	-45.8%	Shares	Defined	2025-08-14
2025-03-31	$22,164	426	-55.1%	Shares	Defined	2025-05-15
2024-06-30	$52,622	949	—	Shares	Defined	2024-08-14
No filing history on record for this holder in this stock.