PHILLIPPY ROBERT J plan to sell securities of MATERION Corp under Form 144

PHILLIPPY ROBERT J filed Form 144 to notify SEC of plan to sell 3500 units of MATERION Corp securities around 2026-05-29, with aggregate market value of $765,164.10. The total outstanding units is 20801485.0. The amount planned to be sold represents 0.02% of total outstanding units;