Graham Corporation (GHM) has 20 known insider and institutional holders on record. The largest holder is Thoren Daniel J. with 351,783 shares. Other notable holders include BERKELEY HELEN H and LINES JAMES R.
Over the last 12 months, insiders have made 37 transactions in GHM stock — 11 buys (valued at $58.81K) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
GHM Insider Ownership
Top Holder
Thoren Daniel J.
351,783 shares
Buys (12 mo)
11
$58.81K value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Thoren Daniel J. |
Executive Chairman |
351,783 |
2025-06-11 |
|
| 2 |
Berkeley Helen H |
Director |
185,379 |
2014-06-02 |
|
| 3 |
Lines James R |
Chief Executive Officer |
100,502 |
2022-04-26 |
|
| 4 |
Smith Alan E |
VP & General Manager - Batavia |
66,634 |
2025-06-11 |
|
| 5 |
Malone Matthew |
President and CEO |
53,064 |
2025-06-11 |
|
| 6 |
Glajch Jeffrey |
VP-finance; CFO |
44,155 |
2022-04-26 |
|
| 7 |
Lemcke H Russel |
Director |
39,470 |
2008-06-05 |
|
| 8 |
Van Rees Cornelius S |
Director |
35,962 |
2011-05-27 |
|
| 9 |
Malvaso James J |
Director |
29,384 |
2021-06-02 |
|
| 10 |
Condame Jennifer R |
CAO and Controller |
29,161 |
2022-06-10 |
|
| 11 |
Thome Christopher J. |
VP-finance; CFO |
27,360 |
2025-06-11 |
|
| 12 |
Mazurkiewicz Gerard T |
Director |
21,088 |
2021-06-02 |
|
| 13 |
Gross Matthew Lee |
VP & GM of Flacktek |
15,203 |
2026-02-11 |
|
| 14 |
Rice John N |
Vice President of Sales |
10,573 |
2019-08-26 |
|
| 15 |
Bidlack Jerald D |
Director |
5,885 |
2015-02-05 |
|
| 16 |
Platt Robert A. |
Vice President of Sales |
3,617 |
2012-06-01 |
|
| 17 |
Fortier Alan |
Director |
2,934 |
2024-06-06 |
|
| 18 |
Barber James J |
Director |
1,956 |
2025-06-04 |
|
| 19 |
Schnorr Lisa M. |
Director |
1,956 |
2025-06-04 |
|
| 20 |
Painter Jonathan W |
Director |
1,956 |
2025-06-04 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-01 |
Zmyndak William H. |
VP & GM Graham Manufacturing |
Unknown |
3,473 |
- |
- |
| 2026-02-04 |
Dixon Michael E. |
VP & GM of Barber-nichols |
Option Exercise (Sell) |
355 |
- |
- |
| 2026-02-03 |
Gross Matthew Lee |
VP & GM of Flacktek |
Unknown |
- |
- |
- |
| 2025-09-12 |
Gregorio Mauro |
Director |
Informative Buy |
1,200 |
$49.01 |
$58.81K |
| 2025-09-02 |
Gregorio Mauro |
Director |
RSU Award |
936 |
- |
- |
| 2025-09-01 |
Gregorio Mauro |
Director |
Unknown |
- |
- |
- |
| 2025-06-10 |
Dixon Michael E. |
VP & GM of Barber-nichols |
Unknown |
1,066 |
- |
- |
| 2025-06-09 |
Thome Christopher J. |
VP-finance; CFO |
Tax Withholding of RSU |
2,680 |
$44.66 |
$119.69K |
| 2025-06-09 |
Thoren Daniel J. |
Executive Chairman |
Tax Withholding of RSU |
7,394 |
$44.66 |
$330.22K |
| 2025-06-09 |
Malone Matthew |
President and CEO |
Tax Withholding of RSU |
2,211 |
$44.66 |
$98.74K |
| 2025-06-09 |
Smith Alan E |
VP & General Manager - Batavia |
Tax Withholding of RSU |
3,619 |
$44.66 |
$161.62K |
| 2025-06-04 |
Thome Christopher J. |
VP-finance; CFO |
Option Exercise (Sell) |
1,643 |
- |
- |
| 2025-06-04 |
Thoren Daniel J. |
Chief Executive Officer |
Option Exercise (Sell) |
5,542 |
- |
- |
| 2025-06-04 |
Malone Matthew |
President and COO |
Option Exercise (Sell) |
1,291 |
- |
- |
| 2025-06-04 |
Smith Alan E |
VP & General Manager - Batavia |
Option Exercise (Sell) |
1,291 |
- |
- |
| 2025-06-02 |
Thome Christopher J. |
VP-finance; CFO |
RSU Award |
3,299 |
- |
- |
| 2025-06-04 |
Stoner Troy A. |
Director |
Option Exercise (Sell) |
2,934 |
- |
- |
| 2025-06-02 |
Stoner Troy A. |
Director |
RSU Award |
1,956 |
- |
- |
| 2025-06-02 |
Thoren Daniel J. |
Chief Executive Officer |
RSU Award |
1,588 |
- |
- |
| 2025-06-02 |
Malone Matthew |
President and COO |
RSU Award |
7,622 |
- |
- |
| 2025-06-04 |
Schnorr Lisa M. |
Director |
Option Exercise (Sell) |
2,934 |
- |
- |
| 2025-06-02 |
Schnorr Lisa M. |
Director |
RSU Award |
1,956 |
- |
- |
| 2025-06-02 |
Smith Alan E |
VP & General Manager - Batavia |
RSU Award |
2,591 |
- |
- |
| 2025-06-04 |
Barber James J |
Director |
Option Exercise (Sell) |
2,934 |
- |
- |
| 2025-06-02 |
Barber James J |
Director |
RSU Award |
1,956 |
- |
- |
