Arkolith/Insider Trading/MTRN/Form 4

Chadwick Shelly Marie

Vice President, Finance & CFOMATERION Corp (MTRN) · full profile →Form 4 · filed Mar 3, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$406K
Net Open-Market Flow
-$406K
Transactions
7
4 non-derivative · 3 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Mar 3, 2026Sell(S)2K$162.00$243K15K
Mar 3, 2026Sell(S)1K$157.26$163K17K
Mar 2, 2026Tax withholding(F)4K$166.59$651K18K
Mar 1, 2026Option exercise(M)6K—$022K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Mar 1, 2026Option exercise(M)6K—$09K
Mar 1, 2026Grant(A)5K—$05K
Mar 1, 2026Grant(A)4K—$012K

Transaction Codes

S
Open-market sale
F
Shares withheld for taxes
M
Option exercise / conversion
A
Grant / award

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001688289-26-000010) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML