PHILLIPPY ROBERT J 4

What Happened
Robert J. Phillippy, a director of MATERION Corp (MTRN), sold a total of 3,500 shares in open-market transactions on May 29, 2026. The sales were reported in four blocks: 1,320 shares at a weighted avg $217.67 ($287,322); 1,084 shares at $218.59 ($236,956); 740 shares at $219.54 ($162,460); and 356 shares at $220.30 ($78,426). Total reported proceeds are approximately $765,164. These were sales (code S), which are typically routine dispositions rather than indicator purchases.

Key Details

• Transaction date: 2026-05-29 (reported on Form 4 filed 2026-06-01).
• Individual reported blocks:
  • 1,320 shares @ weighted avg $217.67 (prices ranged $217.345–$217.920) — $287,322 (F2)
  • 1,084 shares @ weighted avg $218.59 (prices ranged $218.160–$218.925) — $236,956 (F3)
  • 740 shares @ weighted avg $219.54 (prices ranged $219.310–$219.920) — $162,460 (F4)
  • 356 shares @ weighted avg $220.30 (prices ranged $220.150–$220.480) — $78,426 (F5)
• Reporting note (F1): The filer offers to provide a detailed breakdown of the number of shares sold at each separate price within the ranges on request.
• Shares owned after the transaction: not disclosed in the information provided in this summary (noted as absent from the supplied filing details).
• Filing timeliness: Form filed 2026-06-01 for 2026-05-29 trades; no late-filing flag indicated in the provided data.

Context
These were open-market sales by a company director (sale code S). Sales by insiders can be for many personal reasons and do not necessarily signal a change in company outlook; the filing provides weighted-average prices and price ranges for the multiple executions. If you need the exact per-trade breakdown, the filing’s footnote F1 says the reporting person will provide full details on request.