CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

Pension

Position in MTRN — MATERION Corp

CIK 1081019 WEST SACRAMENTO, CA

Back to MTRN Full portfolio

Position in MTRN

as of Mar 31, 2026 · filed May 18, 2026 Compact

Position Value

$3,560,125

+$1,112,762 QoQ

Shares Held

24,612

+25.0% QoQ

Ownership

0.118%

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 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in MTRN Over Time

Shares Held

Position Value (USD)

Position in Other Industrial Metals & Mining

Basic Materials · as of Mar 31, 2026

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $17,082,026 across 12 Other Industrial Metals & Mining names. MTRN ranks #2 (20.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MP	MP Materials Corp. / DE	164,054	$7,917,246
2	MTRN	MATERION Corp This page	24,612	$3,560,125
3	USAR	USA Rare Earth, Inc.	116,048	$1,756,386
4	TMC	TMC the metals Co Inc.	264,499	$1,235,210
5	UAMY	United States Antimony Corp	112,293	$980,317
6	CMP	Compass Minerals International Inc	31,973	$746,569
7	NB	Niocorp Developments Ltd	107,799	$480,783
8	TMQ	Trilogy Metals Inc.	96,400	$346,076

All Filings in MTRN

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$3,560,125	24,612	+25.0%	Shares	Sole	2026-05-18
2025-12-31	$2,447,363	19,686	+2.7%	Shares	Sole	2026-02-17
2025-09-30	$2,315,806	19,169	+7.2%	Shares	Sole	2025-11-14
2025-06-30	$1,419,214	17,881	-5.4%	Shares	Sole	2025-08-14
2025-03-31	$1,543,137	18,911	-2.5%	Shares	Sole	2025-05-15
2024-12-31	$1,917,480	19,392	-1.1%	Shares	Sole	2025-03-18
2024-09-30	$2,192,567	19,601	-2.7%	Shares	Sole	2025-04-04
2024-06-30	$2,177,846	20,141	-2.6%	Shares	Sole	2025-04-08
2024-03-31	$2,725,248	20,685	-5.0%	Shares	Sole	2024-05-16
2023-12-31	$2,832,409	21,766	-4.4%	Shares	Sole	2024-02-13
2023-09-30	$2,319,267	22,758	-8.9%	Shares	Sole	2023-11-14
2023-06-30	$2,851,574	24,970	-2.6%	Shares	Sole	2023-08-21
2023-03-31	$2,973,312	25,632	-1.5%	Shares	Sole	2023-05-09
2022-12-31	$2,276,222	26,011	+1.2%	Shares	Sole	2023-02-14
2022-09-30	$2,057,120	25,714	-1.7%	Shares	Sole	2022-11-21
2022-06-30	$1,928,924	26,162	+0.2%	Shares	Sole	2022-08-15
2022-03-31	$2,238,328	26,106	-8.1%	Shares	Sole	2022-05-16
2021-12-31	$2,611,555	28,405	+2.0%	Shares	Sole	2022-02-15
2021-09-30	$1,911,006	27,841	-0.9%	Shares	Sole	2021-11-15
2021-06-30	$2,116,581	28,090	-8.2%	Shares	Sole	2021-08-16
2021-03-31	$2,027,738	30,612	-0.1%	Shares	Sole	2021-05-18
2020-12-31	$1,953,272	30,654	0.0%	Shares	Sole	2021-02-16
2020-09-30	$1,594,927	30,654	+0.1%	Shares	Sole	2020-11-17
2020-06-30	$1,882,147	30,609	-0.2%	Shares	Sole	2020-08-17
2020-03-31	$1,073,476	30,662	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.