Insider Profile · SEC Form 4 Activity · Trailing 90 Days

Dietrich Douglas T

Over the trailing 90 days, Dietrich Douglas T (Director at MINERALS TECHNOLOGIES INC) traded $3.5M of stock (net selling $50K) across 2 companies, per 4 SEC Form 4 transactions.

Role: Director
Companies: MTX KMT
Window: Trailing 90 days · 4 transactions · CIK 1408736
Net activity: −$50K ($1.7M bought · $1.8M sold)
Source: Official filings on sec.gov ↗

By Company (Trailing 90 Days)

Symbol	Company	Txns	Bought	Sold	Net
MTX	MINERALS TECHNOLOGIES INC	3	$1.7M	$1.8M	−$76K
KMT	KENNAMETAL INC	1	$26K	—	$26K

Transactions (4)

Date	Symbol	Type	Shares	Value	Description
2026-05-26	KMT	Buy	697	$26K	Grant, award or other acquisition
2026-05-14	MTX	Buy	21.6K	$1.7M	Exercise or conversion of derivative security
2026-05-14	MTX	Sell	21.6K	$1.8M	Open market or private sale
2026-05-14	MTX	Sell	21.6K	$0	Exercise or conversion of derivative security

Activity shown covers the trailing 90 days of SEC Form 4 filings. "Buy" and "sell" follow the SEC acquired/disposed codes and include compensation events (grants, option exercises, tax withholding) unless noted. Historical fact, not investment advice.

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