Robert J. Phillippy - 07 May 2026 Form 4 Insider Report for MATERION Corp (MTRN)

Reporting relationship: Director
Issuer ticker: MTRN
Reported as of: 07 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 11 May 2026, 14:01:03 UTC
Prior SEC filing: 20 Apr 2026
Next SEC filing: 01 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/Michelle R. Mekinda, as Attorney-In-Fact

Key filing fact

Robert J. Phillippy filed Form 4 for MATERION Corp (MTRN) on 11 May 2026.

Key facts

This page summarizes Robert J. Phillippy's Form 4 filing for MATERION Corp (MTRN).
3 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 11 May 2026, 14:01.

Change

Previous filing in this sequence was filed on 20 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001213190 Primary reporting owner

PHILLIPPY ROBERT J

Relationship: Director
Address: 6070 PARKLAND BLVD., MAYFIELD HEIGHTS
Signature: /s/Michelle R. Mekinda, as Attorney-In-Fact
Signature date: 11 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MTRN transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,006
Change %: +39%
Price
Shares after: 7,164
Date: 07 May 2026
Ownership: Direct
Footnotes: F1

MTRN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 12,027
Date: 07 May 2026
Ownership: Held in Directors Deferred Compensation Plan

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MTRN transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -2,006
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 07 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,006
Exercise price
Footnotes: F1, F2, F3

MTRN transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +758
Change %
Price: $0.000000^*
Shares after: 758
Date: 08 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 758
Exercise price
Footnotes: F1, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Each restricted stock unit represents a right to receive one share of MTRN common stock.

Footnote F2

These shares were issued pursuant to the vesting of a restricted stock unit award made May 8, 2025 that vested on May 7, 2026.

Footnote F3

Expiration Date is the same as the Date Exercisable.

Footnote F4

The restricted stock units generally vest on the earlier of (1) the first anniversary of the grant date and (2) the next annual meeting of MTRN's shareholders that follows the grant.