SEC Form 4
Minerals Technologies Inc (MTX) insider trading
In the 12 months to Oct 24, 2026, 4 MTX insiders reported open-market sales of $4.1M across 4 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $4.1M
- 4 filings · 4 insiders
- Open-market purchases
- $0
- 0 filings
Who traded MTX, and when
- Sale
MTX daily close from Oct 24, 2025 to Oct 23, 2026, between $55.09 and $82.84, last $62.90. 4 sale and 0 purchase filings by 4 insiders, marked at their filing dates. Douglas T. Dietrich, CHAIRMAN AND CEO: sold $1.8M across 1 filing, first filed May 18, 2026, last May 18, 2026. Dj Monagle III, Group President: sold $1.4M across 1 filing, first filed Dec 31, 2025, last Dec 31, 2025. Timothy Jordan, Vice President: sold $481.6K across 1 filing, first filed May 13, 2026, last May 13, 2026. Brett Argirakis, Group President: sold $381.5K across 1 filing, first filed Nov 25, 2025, last Nov 25, 2025.
Largest mark · tap a row for others
Douglas T. Dietrich · CHAIRMAN AND CEO
Sale $1,758,422
21,568 shares at $81.53 avg
Filed May 18, 2026 · traded May 14
Close on filing date $75.97
Douglas T. Dietrich · CHAIRMAN AND CEO
CHAIRMAN AND CEO
$1.8M soldDj Monagle III · Group President
Group President
$1.4M soldTimothy Jordan · Vice President
Vice President
$481.6K soldBrett Argirakis · Group President
Group President
$381.5K soldHas Minerals Technologies Inc's CEO sold stock?
Yes. Douglas T. Dietrich (CEO) sold 21,568 shares ($1.8M) in May 2026.
Open-market trades
4 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Douglas T. Dietrich | CHAIRMAN AND CEO | $1.8M | — | 1 | — | |
| Dj Monagle III | Group President | $1.4M | — | 1 | — | |
| Timothy Jordan | Vice President | $481.6K | — | 1 | — | |
| Brett Argirakis | Group President | $381.5K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Douglas T. Dietrich CHAIRMAN AND CEO | Sale | 21,568 | $81.53 | $1.8M | 175,973 | |
traded | Timothy Jordan Vice President | Sale | 6,000 | $80.27 | $481.6K | 1,279 | |
traded | Dj Monagle III Group President | Sale | 23,093 | $61.90 | $1.4M | 84,349 | |
traded | Brett Argirakis Group President | Sale | 6,501 | $58.68 | $381.5K | 27,602 |
GET /stocks/filings/vX/form-4?tickers=MTX&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"MTX"
],
"issuer_cik": "0000891014",
"owner_cik": "0001408736",
"accession_number": "0000891014-26-000113",
"form_type": "4",
"filing_date": "2026-05-18",
"period_of_report": "2026-05-14",
"issuer_name": "MINERALS TECHNOLOGIES INC",
"issuer_trading_symbol": "MTX",
"owner_name": "DIETRICH DOUGLAS T",
"is_director": true,
"is_officer": true,
"officer_title": "CHAIRMAN AND CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-14",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 21568,
"transaction_price_per_share": 81.5292,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 175973,
"transaction_value": 1758421.7856,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Weighted average price representing high of $81.960 and low of $81.140."
}
]
},
{
"tickers": [
"MTX"
],
"issuer_cik": "0000891014",
"owner_cik": "0001958124",
"accession_number": "0000891014-26-000110",
"form_type": "4",
"filing_date": "2026-05-13",
"period_of_report": "2026-05-11",
"issuer_name": "MINERALS TECHNOLOGIES INC",
"issuer_trading_symbol": "MTX",
"owner_name": "JORDAN TIMOTHY",
"is_officer": true,
"officer_title": "Vice President",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-11",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 6000,
"transaction_price_per_share": 80.2747,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 1279,
"transaction_value": 481648.19999999995,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Weighted average price representing high of $80.620 and low of $80.045."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 51 records
- Option exercises27 records
- Tax withholding24 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for MTX every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.