Stock Ownership/MTRN

MATERION CORP (MTRN): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in MTRN · Materials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
16
13F filers
Aggregate Value
$293.2M
Across holders
Last Price
$229.84
2026-08-24
Sector
Materials
GICS
Quarterly fund activity8 increased7 reduced4 exited
Full exits: TWO SIGMA INVESTMENTS, LP, Qube Research & Technologies Ltd, Holocene Advisors, LP, CAPSTONE INVESTMENT ADVISORS, LLC
Institutional Holders of MTRN
↗
16 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
Fisher Asset Management, LLC
CIK 0000850529
Institutional Manager495K$147.3M50.2%0.0%Added+$15.8MQ2 2026
GAMCO INVESTORS, INC. ET AL
CIK 0000807249
Institutional Manager181K$53.8M18.4%0.5%Reduced$-3.1MQ2 2026
First Eagle Investment Management, LLC
CIK 0001325447
Institutional Manager119K$35.5M12.1%0.1%Added+$5.2MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund70K$20.8M7.1%0.0%Added+$20.0MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund65K$19.3M6.6%0.0%Added$-3.4MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund13K$3.9M1.3%0.0%Reduced$-1.6MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund12K$3.6M1.2%0.0%Reduced$-680KQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund8K$2.4M0.8%0.0%Unchanged+$0Q2 2026
Brevan Howard Capital Management LP
CIK 0001512857
Hedge Fund7K$2.2M0.7%0.0%Added+$1.7MQ2 2026
Man Group plc
CIK 0001637460
Hedge Fund5K$1.6M0.5%0.0%Added$-867KQ2 2026
Fisher Asset Management, LLCAdded
Institutional Manager
$147.3M· 50.2% of total· 0.0% port· 495K sh· +$15.8M QoQ· Q2 2026
GAMCO INVESTORS, INC. ET ALReduced
Institutional Manager
$53.8M· 18.4% of total· 0.5% port· 181K sh· $-3.1M QoQ· Q2 2026
First Eagle Investment Management, LLCAdded
Institutional Manager
$35.5M· 12.1% of total· 0.1% port· 119K sh· +$5.2M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$20.8M· 7.1% of total· 0.0% port· 70K sh· +$20.0M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$19.3M· 6.6% of total· 0.0% port· 65K sh· $-3.4M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPReduced
Hedge Fund
$3.9M· 1.3% of total· 0.0% port· 13K sh· $-1.6M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$3.6M· 1.2% of total· 0.0% port· 12K sh· $-680K QoQ· Q2 2026
SHAW D E & CO INCUnchanged
Hedge Fund
$2.4M· 0.8% of total· 0.0% port· 8K sh· +$0 QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$2.2M· 0.7% of total· 0.0% port· 7K sh· +$1.7M QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$1.6M· 0.5% of total· 0.0% port· 5K sh· $-867K QoQ· Q2 2026
Bridgewater Associates, LPReduced
Hedge Fund
$956K· 0.3% of total· 0.0% port· 3K sh· $-134K QoQ· Q2 2026
Gotham Asset Management, LLCAdded
Hedge Fund
$826K· 0.3% of total· 0.0% port· 3K sh· +$4K QoQ· Q2 2026
CAXTON ASSOCIATES LLPReduced
Hedge Fund
$537K· 0.2% of total· 0.0% port· 2K sh· $-277K QoQ· Q2 2026
SOROS FUND MANAGEMENT LLCReduced
Family Office
$427K· 0.1% of total· 0.0% port· 1K sh· $-5.9M QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$151K· 0.1% of total· 0.0% port· 508 sh· $-158K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$579· 0.0% of total· 0.0% port· 2 sh· — QoQ· Q2 2026
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