Why insider trading matters?

When insiders buy shares on the open market, this can thus be regarded as a strong endorsement by those that know the company the best -- they are literally betting their own money on the company's future. Insider selling, however, is not necessarily meaningful in any way, as there is a range of reasons for insiders to liquidate (some) of the shares they own.

- Seeking Alpha
PROTHENA CORP PUBLIC LTD CO (PRTA)
Sector: Healthcare; Industry: Biotechnology

Prothena Corporation plc, a clinical-stage neuroscience company, focuses on discovery and development of novel therapies for life-threatening diseases in the United States. Its discovery-stage programs include Tau for treating Alzheimer's disease, progressive supranuclear palsy, frontotemporal dementia, chronic traumatic encephalopathy, and other tauopathies; Aß, or Amyloid Beta, a protein for the treatment of Alzheimer's disease; TDP-43 for amyotrophic lateral sclerosis and frontotemporal dementia; and other products for neurodegeneration.


Trade Date Insider Title Buy/Sell #Shares Price Value Option
2021-02-24 EcoR1 Capital, LLC 10%-Owner Buy 55,200 $21.24 $1,172,385 No
2021-02-18 EcoR1 Capital, LLC 10%-Owner Buy 44,100 $23.65 $1,043,075 No
2021-02-18 EcoR1 Capital, LLC 10%-Owner Buy 44,100 $3.68 $162,103 No
2021-02-18 Zago Wagner M. Chief Scientific Officer Sell 7,540 $25.50 $192,270 Yes
2021-02-17 EcoR1 Capital, LLC 10%-Owner Buy 633,340 $21.56 $13,657,270 Yes
2021-02-12 Zago Wagner M. Chief Scientific Officer Sell 26,310 $19.16 $504,057 Yes
2017-10-02 Selkoe Dennis J. Director Sell 3,500 $64.17 $224,583 Yes
2017-09-28 Nickerson Tara Chief Business Officer Sell 17,500 $69.16 $1,210,245 Yes
2017-09-28 Walker Karin L See Remarks Sell 1,500 $70.00 $105,000 Yes
2017-09-28 Kinney Gene G. President and CEO Sell 2,800 $70.00 $196,000 Yes
2017-09-28 Zago Wagner M. Chief Scientific Officer Sell 900 $70.00 $63,000 Yes
2017-09-28 HENNEY CHRISTOPHER S Director Sell 900 $70.00 $63,000 Yes
2017-09-25 Nickerson Tara Chief Business Officer Sell 17,500 $63.60 $1,112,931 Yes
2017-07-17 HENNEY CHRISTOPHER S Director Sell 5,000 $66.13 $330,670 Yes
2017-07-17 Walker Karin L See Remarks Sell 5,000 $64.89 $324,439 Yes
2017-07-07 Selkoe Dennis J. Director Sell 3,500 $58.11 $203,399 Yes
2017-04-17 Walker Karin L See Remarks Sell 5,000 $52.25 $261,262 Yes
2017-04-03 Selkoe Dennis J. Director Sell 3,500 $55.86 $195,523 Yes
2017-03-09 Nguyen Tran Chief Financial Officer Buy 1,000 $51.32 $51,317 No
2017-03-01 Selkoe Dennis J. Director Sell 3,500 $59.25 $207,364 Yes
2017-03-01 HOMAN ARTHUR W Chief Legal Officer Sell 3,125 $59.28 $185,258 Yes
2017-03-01 Kinney Gene G. President and CEO Sell 25,163 $60.77 $1,529,248 Yes
2017-02-28 Kinney Gene G. President and CEO Sell 3,796 $60.00 $227,760 Yes
2017-02-27 HENNEY CHRISTOPHER S Director Sell 5,989 $57.16 $342,350 Yes
2017-02-17 HENNEY CHRISTOPHER S Director Sell 4,011 $57.06 $228,880 Yes
2017-01-04 HOMAN ARTHUR W Chief Legal Officer Sell 3,125 $52.25 $163,291 Yes
2016-11-28 Selkoe Dennis J. Director Sell 5,000 $62.42 $312,118 Yes
2016-11-09 HOMAN ARTHUR W Chief Legal Officer Sell 3,125 $52.19 $163,082 Yes
2016-11-09 Kinney Gene G. President and CEO Sell 8,548 $55.32 $472,905 Yes
2016-10-21 Kinney Gene G. President and CEO Sell 20,619 $55.10 $1,136,103 Yes

Insider Smart

SERVICE CORP INTERNATIONAL (SCI) - WALTRIP W BLAIR, Director of $SCI made a buy at 34.65, was he convinced the bottom of the box is a strong support? Well, seems he is not wrong.

Insider Smart

CEDAR FAIR L.P. (FUN) - Another crash victim, Cedar Fair L.P. took a deep dive from $54 to $13, insiders were confidence and eagerly jumped in around $27. With insiders on your side, this would be an easy add and hold to get your cost under $20. Stock is about to breach $40 in the coming weeks.