Pro-Dex, Inc. (PDEX) has 20 known insider and institutional holders on record. The largest holder is COSS RONALD G with 956,879 shares. Other notable holders include JOHNSON PATRICK L and BERTHELOT MICHAEL J.
Over the last 12 months, insiders have made 11 transactions in PDEX stock — 8 buys (valued at $30.71K) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
PDEX Insider Ownership
Top Holder
COSS RONALD G
956,879 shares
Buys (12 mo)
8
$30.71K value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Coss Ronald G |
Officer |
956,879 |
2009-11-12 |
|
| 2 |
Johnson Patrick L |
Executive Vice President |
433,430 |
2009-11-03 |
|
| 3 |
Berthelot Michael J |
CEO & President |
200,000 |
2012-11-08 |
|
| 4 |
Ritchey Jeffrey J |
CFO, Treasurer & Secretary |
148,000 |
2009-12-08 |
|
| 5 |
Giannini Valerio F |
Director |
110,000 |
2008-12-05 |
|
| 6 |
Van Kirk Richard Lee Jr |
Chief Executive Officer |
99,707 |
2025-11-21 |
|
| 7 |
Swenson Nicholas John |
10 Percent Owner |
97,613 |
2025-11-21 |
|
| 8 |
Mesenbrink Michael A |
Director |
95,000 |
2008-08-25 |
|
| 9 |
Murphy Mark Phillip |
CEO |
50,000 |
2011-12-06 |
|
| 10 |
Charlton Alisha |
Chief Financial Officer |
16,267 |
2025-11-21 |
|
| 11 |
Domingo Angelita Rebamontan |
Director |
15,465 |
2026-01-23 |
|
| 12 |
Healey William L |
Director |
10,000 |
2013-02-06 |
|
| 13 |
Isaac George J |
Director |
10,000 |
2011-12-06 |
|
| 14 |
Holder David |
Director |
10,000 |
2011-12-06 |
|
| 15 |
Hurwitz Harold A |
CEO, Pres, CFO, Sec, Treas |
7,203 |
2014-05-01 |
|
| 16 |
Hovda David |
Director |
4,300 |
2025-11-21 |
|
| 17 |
Haeg Peter O. |
10 Percent Owner |
3,000 |
2021-09-17 |
|
| 18 |
Philp Katrina Marie Kramer |
Director |
2,900 |
2025-11-24 |
|
| 19 |
Farrell William James Iii |
Director |
2,000 |
2025-11-21 |
|
| 20 |
Cabillot Raymond E |
10 Percent Owner |
2,000 |
2025-11-21 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-01-22 |
Domingo Angelita Rebamontan |
Director |
RSU Award |
18 |
$34.36 |
$618.48 |
| 2025-11-21 |
Philp Katrina Marie Kramer |
Director |
RSU Award |
900 |
$32.73 |
$29.46K |
| 2025-11-20 |
Domingo Angelita Rebamontan |
Director |
Tax Withholding of RSU |
72 |
$30.83 |
$2.22K |
| 2025-11-20 |
Philp Katrina Marie Kramer |
Director |
RSU Award |
1,000 |
- |
- |
| 2025-11-20 |
Van Kirk Richard Lee Jr |
Chief Executive Officer |
Tax Withholding of RSU |
72 |
$30.83 |
$2.22K |
| 2025-11-20 |
Farrell William James Iii |
Director |
RSU Award |
1,000 |
- |
- |
| 2025-11-20 |
Swenson Nicholas John |
10 Percent Owner |
RSU Award |
1,000 |
- |
- |
| 2025-11-20 |
Charlton Alisha |
Chief Financial Officer |
Tax Withholding of RSU |
72 |
$30.83 |
$2.22K |
| 2025-11-20 |
Cabillot Raymond E |
10 Percent Owner |
RSU Award |
1,000 |
- |
- |
| 2025-11-20 |
Hovda David |
Director |
RSU Award |
1,000 |
- |
- |
| 2025-07-24 |
Domingo Angelita Rebamontan |
Director |
RSU Award |
15 |
$42.34 |
$635.10 |
