ProPhase Labs, Inc. (PRPH) has 20 known insider and institutional holders on record. The largest holder is Leventhal Mark S with 850,480 shares. Other notable holders include Leonard Braden Michael and Hollenshead Stuart.
Over the last 12 months, insiders have made 2 transactions in PRPH stock — 1 buys (valued at $300K) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
PRPH Insider Ownership
Top Holder
Leventhal Mark S
850,480 shares
Buys (12 mo)
1
$300K value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Leventhal Mark S |
Director |
850,480 |
2015-12-08 |
|
| 2 |
Leonard Braden Michael |
10 Percent Owner |
627,322 |
2017-10-02 |
|
| 3 |
Hollenshead Stuart |
Chief Operating Officer |
500,000 |
2025-02-21 |
|
| 4 |
Latkin Jed |
Director |
500,000 |
2024-03-19 |
|
| 5 |
Karkus Ted William |
CEO & Chairman |
500,000 |
2025-09-11 |
|
| 6 |
Burnett Mark A. |
Director |
318,282 |
2018-10-02 |
|
| 7 |
Deshazo John |
Director |
283,515 |
2010-07-13 |
|
| 8 |
Brady Monica L. |
Chief Financial Officer |
150,000 |
2020-08-18 |
|
| 9 |
Cuddihy Robert V Jr |
Chief Financial Officer |
132,703 |
2017-10-02 |
|
| 10 |
Hirsch Warren |
Director |
100,000 |
2025-02-18 |
|
| 11 |
Gleckel Louis Md |
Director |
100,000 |
2025-02-18 |
|
| 12 |
Frank Mark Shawn |
Director |
79,235 |
2015-01-05 |
|
| 13 |
Barr Jason Michael |
Director |
70,000 |
2024-03-19 |
|
| 14 |
Morse Robert A. Jr. |
Chief Financial Officer |
50,000 |
2023-04-06 |
|
| 15 |
Phillips Charles A |
10 Percent Owner, Officer: EVP, COO |
50,000 |
2006-05-08 |
|
| 16 |
Longo George J |
Vice President and CFO |
40,000 |
2006-04-13 |
|
| 17 |
Mccubbin James T |
Director |
31,829 |
2015-01-05 |
|
| 18 |
Schaum Rounsevelle W |
Director |
20,000 |
2006-04-14 |
|
| 19 |
Wouch Stephen W |
Director |
20,000 |
2006-04-13 |
|
| 20 |
Lewis Jacqueline F |
Director |
20,000 |
2006-04-14 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-06-20 |
Abenante Carolina |
Director |
Unknown |
- |
- |
- |
| 2025-09-09 |
Karkus Ted William |
CEO & Chairman |
RSU Award |
500,000 |
$0.60 |
$300K |
