WELLINGTON MANAGEMENT GROUP LLP

Position in MTRN — MATERION Corp

CIK 902219 Boston, MA

Position in MTRN

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

Position Value

$47,087,243

+$28,150,432 QoQ

Shares Held

158,335

-26.8% QoQ

Ownership

0.760%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

#27

of 402 holders

Holding Since

Jun 2021

8 quarters on record

Voting authority Sole 0% Shared 88% None 12%

Basic Materials · as of Jun 30, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $402,315,377 across 5 Other Industrial Metals & Mining names. MTRN ranks #3 (11.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BHP	BHP Group Ltd	3,524,310	$293,610,264
2	RIO	Rio Tinto PLC	529,665	$50,281,098
3	MTRN	MATERION Corp This page	158,335	$47,087,243
4	VALE	Vale S.A.	734,789	$11,051,224
5	SGML	Sigma Lithium Corp	22,573	$285,548

8 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$47,087,243	158,335	-26.8%	Shares	Defined	2026-08-14
2022-12-31	$18,936,811	216,396	+4.3%	Shares	Defined	2023-02-13
2022-09-30	$16,595,680	207,446	+306.5%	Shares	Defined	2022-11-14
2022-06-30	$3,762,146	51,026	+128.0%	Shares	Defined	2022-08-15
2022-03-31	$1,918,774	22,379	+85.3%	Shares	Defined	2022-05-16
2021-12-31	$1,110,542	12,079	-6.4%	Shares	Defined	2022-02-11
2021-09-30	$885,456	12,900	0.0%	Shares	Defined	2021-11-15
2021-06-30	$972,015	12,900	—	Shares	Defined	2021-08-16
No filing history on record for this holder in this stock.