Chadwick Shelly Marie 4

What Happened

• Shelly Marie Chadwick, Vice President, Finance & Chief Financial Officer of MATERION Corp (MTRN), was granted 8 restricted stock units (RSUs) on June 12, 2026. The transaction is recorded as an award/acquisition of a derivative instrument at $0.00 per unit (total reported value $0).
• This was an award of RSUs (not an open-market purchase or sale). RSUs represent the right to receive one share of MTRN common stock upon vesting; their future value will depend on the company’s share price at settlement.

Key Details

• Transaction date and price: June 12, 2026 — 8 RSUs acquired at $0.00 (derivative award).
• Shares owned after transaction: Not disclosed in this Form 4.
• Footnotes: F1 — each RSU converts to one share when settled; F2 — these RSUs were acquired through reinvestment of dividend equivalents and will vest alongside the related RSUs; F3 — expiration date equals date exercisable for related derivative terms.
• Filing timeliness: Form 4 filed June 16, 2026, which is within the two-business-day filing window following the June 12 transaction (timely).

Context

• RSU awards and dividend-equivalent reinvestments are routine compensation events for executives and do not by themselves indicate an immediate buy/sell decision. These RSUs will convert to shares only if/when they vest or are settled per the plan terms.