Minerals Technologies Inc. (MTX) has 20 known insider and institutional holders on record. The largest holder is DIETRICH DOUGLAS T with 81,204 shares. Other notable holders include DUNHAM DUANE and CLARK ROBERT L.
Over the last 12 months, insiders have made 90 transactions in MTX stock — 64 buys (valued at $5.25M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
MTX Insider Ownership
Top Holder
DIETRICH DOUGLAS T
81,204 shares
Buys (12 mo)
64
$5.25M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Dietrich Douglas T |
Chairman and CEO |
81,204 |
2026-01-27 |
|
| 2 |
Dunham Duane |
Director |
35,769 |
2023-03-13 |
|
| 3 |
Clark Robert L |
Director |
31,742 |
2026-03-10 |
|
| 4 |
Monagle Dj Iii |
Group President |
26,801 |
2026-01-27 |
|
| 5 |
Carmola John J |
Director |
26,004 |
2026-03-10 |
|
| 6 |
Robinson Marc E |
Director |
24,965 |
2026-03-10 |
|
| 7 |
Argirakis Brett |
Group President |
24,244 |
2026-01-27 |
|
| 8 |
Feder Franklin |
Director |
23,223 |
2026-04-03 |
|
| 9 |
Breunig Joseph C. |
Director |
19,622 |
2026-03-10 |
|
| 10 |
Winter Donald C |
Director |
19,368 |
2022-03-14 |
|
| 11 |
Pittman Carolyn K |
Director |
18,711 |
2026-04-02 |
|
| 12 |
Meek Thomas J |
Senior Vice President |
17,107 |
2022-01-28 |
|
| 13 |
Deans Alison Ann |
Director |
15,439 |
2026-03-10 |
|
| 14 |
Garth Matthew E |
SVP, Finance & Treasury, & CFO |
13,591 |
2022-03-08 |
|
| 15 |
Hastings Jonathan J |
Senior Vice President |
11,738 |
2026-01-27 |
|
| 16 |
Cipolla Michael |
Vice President |
9,915 |
2026-01-27 |
|
| 17 |
Cutler Erin |
VP, Human Resources |
7,059 |
2026-01-27 |
|
| 18 |
Jones Andrew M |
Vice President |
6,676 |
2021-01-28 |
|
| 19 |
Jordan Timothy |
Vice President |
6,343 |
2026-01-27 |
|
| 20 |
Motwani Rocky |
Director |
6,185 |
2026-03-10 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-01 |
Feder Franklin |
Director |
RSU Award |
239 |
- |
- |
| 2026-04-01 |
Pittman Carolyn K |
Director |
RSU Award |
102 |
- |
- |
| 2026-03-06 |
Motwani Rocky |
Director |
RSU Award |
11 |
- |
- |
| 2026-03-06 |
Feder Franklin |
Director |
RSU Award |
41 |
- |
- |
| 2026-03-06 |
Pittman Carolyn K |
Director |
RSU Award |
33 |
- |
- |
| 2026-03-06 |
Robinson Marc E |
Director |
RSU Award |
44 |
- |
- |
| 2026-03-06 |
Breunig Joseph C. |
Director |
RSU Award |
35 |
- |
- |
| 2026-03-06 |
Clark Robert L |
Director |
RSU Award |
56 |
- |
- |
| 2026-03-06 |
Deans Alison Ann |
Director |
RSU Award |
27 |
- |
- |
| 2026-03-06 |
Carmola John J |
Director |
RSU Award |
46 |
- |
- |
| 2026-03-06 |
Johnson Kristina M |
Director |
RSU Award |
7 |
- |
- |
| 2026-01-26 |
Jordan Timothy |
Vice President |
Tax Withholding of RSU |
981 |
$68.89 |
$67.58K |
| 2026-01-23 |
Jordan Timothy |
Vice President |
Tax Withholding of RSU |
1,058 |
$68.77 |
$72.76K |
| 2026-01-26 |
Aldag Erik |
SVP Finance and Treasury, CFO |
Tax Withholding of RSU |
1,019 |
$68.89 |
$70.2K |
| 2026-01-23 |
Aldag Erik |
SVP Finance and Treasury, CFO |
Tax Withholding of RSU |
1,240 |
$68.77 |
$85.27K |
| 2026-01-26 |
Cutler Erin |
VP, Human Resources |
Tax Withholding of RSU |
520 |
$68.89 |
$35.82K |
| 2026-01-23 |
Cutler Erin |
VP, Human Resources |
Tax Withholding of RSU |
608 |
$68.77 |
$41.81K |
| 2026-01-26 |
Argirakis Brett |
Group President |
Option Exercise (Sell) |
2,672 |
- |
- |
| 2026-01-23 |
Argirakis Brett |
Group President |
Option Exercise (Sell) |
3,247 |
- |
- |
| 2026-01-26 |
Hastings Jonathan J |
Senior Vice President |
Option Exercise (Sell) |
3,051 |
- |
- |
| 2026-01-23 |
Hastings Jonathan J |
Senior Vice President |
Option Exercise (Sell) |
3,113 |
- |
- |
| 2026-01-26 |
Monagle Dj Iii |
Group President |
Option Exercise (Sell) |
3,519 |
- |
- |
| 2026-01-23 |
Monagle Dj Iii |
Group President |
Option Exercise (Sell) |
3,795 |
- |
- |
| 2026-01-26 |
Dietrich Douglas T |
Chairman and CEO |
Option Exercise (Sell) |
11,123 |
- |
- |
| 2026-01-23 |
Dietrich Douglas T |
Chairman and CEO |
Option Exercise (Sell) |
11,016 |
- |
- |
