There have been 50 recent insider transactions recorded for Prothena Corporation plc (PRTA), including 39 buys and 3 sells. Total insider buying was valued at $38.19M and total insider selling at $50.84M.
Notable insiders with recent activity include Nguyen Tran, Walker Karin L, Kinney Gene G.. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — PRTA
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-03 |
Nguyen Tran |
Chief Strategy Officer and CFO |
RSU Award |
230,000 |
$9.36 |
$2.15M |
230,000 |
| 2026-03-03 |
Walker Karin L |
Chief Accounting Officer |
RSU Award |
150,000 |
$9.36 |
$1.4M |
150,000 |
| 2026-03-03 |
Kinney Gene G. |
President and CEO |
RSU Award |
520,000 |
$9.36 |
$4.87M |
520,000 |
| 2026-03-03 |
Zago Wagner M. |
Chief Scientific Officer |
RSU Award |
190,000 |
$9.36 |
$1.78M |
190,000 |
| 2026-03-03 |
Malecek Michael J |
Chief Legal Officer |
RSU Award |
190,000 |
$9.36 |
$1.78M |
190,000 |
| 2026-03-03 |
Smith Brandon S. |
Chief Operating Officer |
RSU Award |
190,000 |
$9.36 |
$1.78M |
190,000 |
| 2026-03-03 |
Swanson Chad J. |
Chief Development Officer |
RSU Award |
190,000 |
$9.36 |
$1.78M |
190,000 |
| 2025-07-28 |
Nguyen Tran |
Chief Strategy Officer and CFO |
RSU Award |
95,000 |
- |
- |
97,205 |
| 2025-07-28 |
Walker Karin L |
Chief Accounting Officer |
RSU Award |
25,000 |
- |
- |
25,000 |
| 2025-07-28 |
Kinney Gene G. |
President and CEO |
RSU Award |
140,000 |
- |
- |
152,793 |
| 2025-07-28 |
Zago Wagner M. |
Chief Scientific Officer |
RSU Award |
85,000 |
- |
- |
85,000 |
| 2025-07-28 |
Malecek Michael J |
Chief Legal Officer |
RSU Award |
80,000 |
- |
- |
80,000 |
| 2025-07-28 |
Smith Brandon S. |
Chief Operating Officer |
RSU Award |
130,000 |
- |
- |
130,000 |
| 2025-07-28 |
Swanson Chad J. |
Chief Development Officer |
RSU Award |
85,000 |
- |
- |
85,000 |
| 2025-05-14 |
Collier Richard T |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-14 |
Welch Daniel G |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-14 |
Ekman Lars |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-14 |
Kim Helen Susan |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-14 |
Cooke Shane |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-14 |
Selkoe Dennis J. |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-14 |
Cobb Paula K |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-14 |
Dunn William H. Jr. |
Director |
RSU Award |
20,183 |
$6.89 |
$138.96K |
20,183 |
| 2025-05-06 |
Ecor1 Capital, Llc |
10 Percent Owner |
Informative Sell |
1,984,053 |
$7.64 |
$15.16M |
5,304,596 |
| 2025-05-05 |
Ecor1 Capital, Llc |
10 Percent Owner |
Informative Sell |
977,693 |
$8.11 |
$7.93M |
7,288,649 |
| 2025-05-02 |
Ecor1 Capital, Llc |
10 Percent Owner |
Informative Sell |
3,317,938 |
$8.36 |
$27.74M |
8,266,342 |
| 2025-03-05 |
Nguyen Tran |
Chief Strategy Officer and CFO |
RSU Award |
107,500 |
$14.95 |
$1.61M |
107,500 |
| 2025-03-05 |
Walker Karin L |
Chief Accounting Officer |
RSU Award |
70,000 |
$14.95 |
$1.05M |
70,000 |
| 2025-03-05 |
Kinney Gene G. |
President and CEO |
RSU Award |
375,000 |
$14.95 |
$5.61M |
375,000 |
| 2025-03-05 |
Karp Carol D. |
Chief Regulatory Officer |
RSU Award |
107,500 |
$14.95 |
$1.61M |
107,500 |
| 2025-03-05 |
Ford David A |
Chief People Officer |
RSU Award |
107,500 |
$14.95 |
$1.61M |
107,500 |
| 2025-03-05 |
Zago Wagner M. |
Chief Scientific Officer |
RSU Award |
107,500 |
$14.95 |
$1.61M |
107,500 |
| 2025-03-05 |
Malecek Michael J |
Chief Legal Officer |
RSU Award |
107,500 |
$14.95 |
$1.61M |
107,500 |
| 2025-03-05 |
Smith Brandon S. |
Chief Operating Officer |
RSU Award |
107,500 |
$14.95 |
$1.61M |
107,500 |
| 2025-03-05 |
Swanson Chad J. |
Chief Development Officer |
RSU Award |
107,500 |
$14.95 |
$1.61M |
107,500 |
| 2025-01-15 |
Scully William P |
10 Percent Owner |
Gift (Given) |
12,000 |
- |
- |
47,000 |
| 2025-01-14 |
Scully William P |
10 Percent Owner |
Informative Buy |
100,000 |
$12.79 |
$1.28M |
735,993 |
| 2025-01-03 |
Scully William P |
10 Percent Owner |
Gift (Given) |
1,000 |
- |
- |
635,993 |
| 2025-01-02 |
Scully William P |
10 Percent Owner |
Gift (Given) |
13,200 |
- |
- |
636,993 |
| 2024-12-31 |
Scully William P |
10 Percent Owner |
Informative Buy |
1,200 |
$13.37 |
$16.04K |
619,393 |
| 2024-12-20 |
Scully William P |
10 Percent Owner |
Gift (Given) |
40,000 |
- |
- |
59,000 |
| 2024-12-19 |
Scully William P |
10 Percent Owner |
Gift (Given) |
681,000 |
- |
- |
616,693 |
| 2024-12-18 |
Scully William P |
10 Percent Owner |
Gift (Received) |
430,000 |
- |
- |
1,224,257 |
| 2024-12-17 |
Scully William P |
10 Percent Owner |
Unknown |
- |
- |
- |
68,000 |
| 2024-10-01 |
Swanson Chad J. |
Chief Development Officer |
RSU Award |
40,000 |
$16.65 |
$666K |
40,000 |
| 2024-09-27 |
Swanson Chad J. |
Chief Development Officer |
Unknown |
27,000 |
$30.30 |
$818.1K |
- |
| 2024-05-15 |
Collier Richard T |
Director |
RSU Award |
15,000 |
$22.39 |
$335.85K |
15,000 |
| 2024-05-15 |
Welch Daniel G |
Director |
RSU Award |
15,000 |
$22.39 |
$335.85K |
15,000 |
| 2024-05-15 |
Ekman Lars |
Director |
RSU Award |
15,000 |
$22.39 |
$335.85K |
15,000 |
| 2024-05-15 |
Kim Helen Susan |
Director |
RSU Award |
15,000 |
$22.39 |
$335.85K |
15,000 |
| 2024-05-15 |
Cooke Shane |
Director |
RSU Award |
15,000 |
$22.39 |
$335.85K |
15,000 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
