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Prothena (PRTA) Insider Trading & Ownership

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$9.20 -0.49 (-5.06%)
As of 04:00 PM Eastern

Prothena (NASDAQ:PRTA) Insider Buying and Selling Activity

Current
Insider Ownership
Percentage
9.20%
Number Of
Insiders Buying
(Last 3 Years)
1
Amount Of
Insider Buying
(Last 3 Years)
$30.84 M
Number Of
Insiders Selling
(Last 3 Years)
12
Amount Of
Insider Selling
(Last 3 Years)
$41.40 M
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PRTA Insider Buying and Selling by Quarter

Prothena Insider and Congressional Trades History

Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails
1/24/2024Karin L. WalkerCAOSell5,000$34.00$170,000.00  
12/20/2023Karin L. WalkerCAOSell5,000$37.19$185,950.00  
11/30/2023Karin L. WalkerCAOSell5,000$34.00$170,000.00  
10/25/2023Karin L. WalkerCAOSell5,000$41.04$205,200.00  
10/11/2023Brandon S. SmithCOOSell4,000$46.75$187,000.00  
10/4/2023Carol D. KarpinsiderSell5,000$46.62$233,100.00  
9/27/2023Michael J. MalecekinsiderSell5,000$47.38$236,900.00  
9/19/2023Karin L. WalkerCAOSell5,000$52.36$261,800.00  
9/13/2023Brandon S. SmithCOOSell4,000$55.49$221,960.00  
9/13/2023Hideki GarreninsiderSell2,000$55.48$110,960.00  
9/6/2023Carol D. KarpinsiderSell5,000$54.76$273,800.00  
8/30/2023Michael J. MalecekinsiderSell5,000$55.01$275,050.00  
8/18/2023Karin L. WalkerCAOSell5,000$57.18$285,900.00  
8/16/2023Brandon S. SmithCOOSell4,000$58.71$234,840.00  
8/16/2023Hideki GarreninsiderSell2,000$58.74$117,480.00  
8/2/2023Wagner M. ZagoinsiderSell4,000$67.05$268,200.00  
7/26/2023Michael J. MalecekinsiderSell5,000$62.33$311,650.00  
7/19/2023Karin L. WalkerCAOSell5,000$69.19$345,950.00  
7/12/2023Brandon S. SmithCOOSell4,000$67.51$270,040.00  
7/12/2023Hideki GarreninsiderSell2,000$67.51$135,020.00  
7/5/2023Carol D. KarpinsiderSell5,000$68.13$340,650.00  
7/3/2023Dennis J SelkoeDirectorSell5,000$67.43$337,150.00  
6/28/2023Michael J. MalecekinsiderSell5,000$69.82$349,100.00  
6/16/2023Hideki GarreninsiderSell7,331$74.00$542,494.00  
6/14/2023Brandon S. SmithCOOSell5,333$73.98$394,535.34  
6/14/2023Hideki GarreninsiderSell4,669$74.22$346,533.18  
6/7/2023Wagner M. ZagoinsiderSell19,000$71.06$1,350,140.00  
5/31/2023Michael J. MalecekinsiderSell5,000$64.64$323,200.00  
5/19/2023Karin L. WalkerCAOSell5,000$74.00$370,000.00  
5/17/2023Gene G KinneyCEOSell45,000$73.70$3,316,500.00  
5/17/2023Tran NguyenCFOSell95,000$73.99$7,029,050.00  
5/3/2023Dennis J SelkoeDirectorSell15,000$57.00$855,000.00  
4/26/2023Michael J. MalecekinsiderSell5,000$53.46$267,300.00  
4/19/2023Karin L. WalkerCAOSell5,000$52.90$264,500.00  
3/29/2023Michael J. MalecekinsiderSell5,000$49.02$245,100.00  
3/20/2023Karin L. WalkerCAOSell5,000$47.72$238,600.00  
3/15/2023Karin L. WalkerCAOSell20,000$48.42$968,400.00  
3/15/2023Michael J. MalecekinsiderSell15,000$48.44$726,600.00  
3/15/2023Tran NguyenCFOSell10,000$48.43$484,300.00  
2/15/2023Tran NguyenCFOSell10,000$53.34$533,400.00  
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1/18/2023Tran NguyenCFOSell10,000$55.53$555,300.00  
1/10/2023Shane CookeDirectorSell5,000$52.92$264,600.00  
1/5/2023Richard T CollierDirectorSell5,000$52.67$263,350.00  
1/3/2023Lars EkmanInsiderSell15,834$55.98$886,387.32  
12/21/2022Tran NguyenCFOSell10,000$58.97$589,700.00  
12/12/2022Shane CookeDirectorSell5,000$61.04$305,200.00  
12/5/2022Richard T CollierDirectorSell5,000$62.07$310,350.00  
11/30/2022Michael J. MalecekinsiderSell5,000$62.28$311,400.00  
11/23/2022Tran NguyenCFOSell10,000$61.09$610,900.00  
11/18/2022Karin L. WalkerCAOSell10,000$57.07$570,700.00  
11/10/2022Shane CookeDirectorSell5,000$56.17$280,850.00  
11/7/2022Richard T CollierDirectorSell5,000$55.62$278,100.00  
11/1/2022Lars EkmanInsiderSell15,833$62.88$995,579.04  
10/27/2022Michael J. MalecekinsiderSell20,000$62.00$1,240,000.00  
10/24/2022Karin L. WalkerCAOSell20,000$57.23$1,144,600.00  
10/19/2022Tran NguyenCFOSell10,000$56.44$564,400.00  
10/10/2022Shane CookeDirectorSell5,000$55.91$279,550.00  
10/5/2022Richard T CollierDirectorSell5,000$57.92$289,600.00  
10/3/2022Hideki GarreninsiderSell4,000$60.90$243,600.00  
9/28/2022Gene G KinneyCEOSell16,412$53.38$876,072.56  
9/28/2022Lars EkmanInsiderSell31,666$48.09$1,522,817.94  
9/28/2022Shane CookeDirectorSell10,000$48.09$480,900.00  
9/21/2022Gene G KinneyCEOSell2,720$32.02$87,094.40  
9/21/2022Tran NguyenCFOSell10,000$30.75$307,500.00  
9/15/2022Hideki GarreninsiderSell4,000$30.00$120,000.00  
8/24/2022Tran NguyenCFOSell10,000$30.17$301,700.00  
8/17/2022Gene G KinneyCEOSell2,181$32.03$69,857.43  
8/12/2022Gene G KinneyCEOSell20,284$32.16$652,333.44  
8/10/2022Gene G KinneyCEOSell991$32.01$31,721.91  
8/5/2022Gene G KinneyCEOSell21,506$32.83$706,041.98  
8/1/2022Hideki GarreninsiderSell4,000$30.52$122,080.00  
7/27/2022Gene G KinneyCEOSell376$32.00$12,032.00  
7/22/2022Tran NguyenCFOSell7,320$32.55$238,266.00  
7/20/2022Shane CookeDirectorSell15,000$32.90$493,500.00  
7/20/2022Tran NguyenCFOSell42,120$32.49$1,368,478.80  
7/6/2022Hideki GarreninsiderSell8,000$30.00$240,000.00  
5/5/2022Ecor1 Capital, LlcMajor ShareholderBuy1,062,736$29.02$30,840,598.72  
(Data available from 1/1/2013 forward)

PRTA Insider Trading Activity - Frequently Asked Questions

The list of insiders at Prothena includes Brandon S. Smith, Carol D. Karp, Dennis J Selkoe, Ecor1 Capital, Llc, Gene G Kinney, Hideki Garren, Karin L. Walker, Lars Ekman, Michael J. Malecek, Richard T Collier, Shane Cooke, Tran Nguyen, and Wagner M. Zago. Learn more on insiders at PRTA.

9.20% of Prothena stock is owned by insiders. Learn more on PRTA's insider holdings.

The following insiders have sold PRTA shares in the last 24 months: Brandon S. Smith ($1,308,375.34), Carol D. Karp ($847,550.00), Dennis J Selkoe ($1,192,150.00), Gene G Kinney ($3,316,500.00), Hideki Garren ($1,252,487.18), Karin L. Walker ($1,994,800.00), Michael J. Malecek ($1,495,900.00), Tran Nguyen ($7,029,050.00), and Wagner M. Zago ($1,618,340.00).

Insiders have sold a total of 302,333 Prothena shares in the last 24 months for a total of $20,055,152.52 sold.

Prothena Key Executives



This page (NASDAQ:PRTA) was last updated on 4/30/2025 by MarketBeat.com Staff
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