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PRTA – prothena corporation plc - ordinary shares (US:NASDAQ)
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Main News & Impact Reports
Date
Time
Symbol
Headline
Impact
6/3
06:02 pm
prta
Prothena (PRTA) was downgraded by Weiss Ratings from "sell (d-)" to "sell (e+)".
Medium
Report
Prothena (PRTA) was downgraded by Weiss Ratings from "sell (d-)" to "sell (e+)".
5/15
06:01 pm
prta
Prothena (PRTA) was upgraded by Weiss Ratings from "sell (e+)" to "sell (d-)".
Medium
Report
Prothena (PRTA) was upgraded by Weiss Ratings from "sell (e+)" to "sell (d-)".
5/11
01:32 pm
prta
Earnings Beat: Prothena Corporation plc Just Beat Analyst Forecasts, And Analysts Have Been Updating Their Models [Yahoo! Finance]
Low
Report
Earnings Beat: Prothena Corporation plc Just Beat Analyst Forecasts, And Analysts Have Been Updating Their Models [Yahoo! Finance]
5/8
11:31 am
prta
Prothena (PRTA) had its price target raised by Citizens Jmp from $19.00 to $20.00. They now have a "market outperform" rating on the stock.
Low
Report
Prothena (PRTA) had its price target raised by Citizens Jmp from $19.00 to $20.00. They now have a "market outperform" rating on the stock.
5/8
08:00 am
prta
Prothena (PRTA) had its "outperform" rating reaffirmed by Citigroup Inc..
Low
Report
Prothena (PRTA) had its "outperform" rating reaffirmed by Citigroup Inc..
5/7
04:05 pm
prta
Prothena Reports First Quarter 2026 Financial Results and Business Highlights
Low
Report
Prothena Reports First Quarter 2026 Financial Results and Business Highlights
4/30
04:05 pm
prta
Prothena to Report First Quarter 2026 Financial Results on May 7
Medium
Report
Prothena to Report First Quarter 2026 Financial Results on May 7
4/28
06:02 pm
prta
Prothena (PRTA) was downgraded by Weiss Ratings from "sell (d-)" to "sell (e+)".
Medium
Report
Prothena (PRTA) was downgraded by Weiss Ratings from "sell (d-)" to "sell (e+)".
Date
Time
Symbol
Company Name
Action
%Chg
5/7/2026
04:05 pm
prta
prothena corporation plc - ordinary shares
BEAT
Report
2.0%
prothena corporation plc - ordinary shares
2/19/2026
04:05 pm
prta
prothena corporation plc - ordinary shares
BEAT
Report
-0.1%
prothena corporation plc - ordinary shares
11/6/2025
04:05 pm
prta
prothena corporation plc - ordinary shares
MISS
Report
4.8%
prothena corporation plc - ordinary shares
8/4/2025
04:05 pm
prta
prothena corporation plc - ordinary shares
MISS
Report
1.3%
prothena corporation plc - ordinary shares
Date
Time
Action
From
To
Firm
Impact
%Chg
Date
Time
Symbol
Headline
Impact
6/9
08:01 am
prta
Form 144 PROTHENA CORP PUBLIC Filed by: Malecek Michael J
Low
Report
Form 144 PROTHENA CORP PUBLIC Filed by: Malecek Michael J
6/5
01:47 pm
prta
Form 4 PROTHENA CORP PUBLIC For: Jun 04 Filed by: SCULLY WILLIAM P
Low
Report
Form 4 PROTHENA CORP PUBLIC For: Jun 04 Filed by: SCULLY WILLIAM P
6/3
12:42 pm
prta
Form 4 PROTHENA CORP PUBLIC For: Jun 02 Filed by: SCULLY WILLIAM P
Low
Report
Form 4 PROTHENA CORP PUBLIC For: Jun 02 Filed by: SCULLY WILLIAM P
5/26
02:52 pm
prta
Form 4 PROTHENA CORP PUBLIC For: May 22 Filed by: SCULLY WILLIAM P
Low
Report
Form 4 PROTHENA CORP PUBLIC For: May 22 Filed by: SCULLY WILLIAM P
5/15
09:29 pm
prta
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: Selkoe Dennis J.
Low
Report
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: Selkoe Dennis J.
5/15
09:29 pm
prta
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: Ekman Lars
Low
Report
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: Ekman Lars
5/15
09:29 pm
prta
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: WELCH DANIEL G
Low
Report
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: WELCH DANIEL G
5/15
09:28 pm
prta
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: COLLIER RICHARD T
Low
Report
Form 4 PROTHENA CORP PUBLIC For: May 15 Filed by: COLLIER RICHARD T
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Main News & Impact Reports
TOP News Gainers
12/19
Form 8-K Prothena Corp plc For: Dec 19
23.2%
3/19 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at BidaskClub from a "hold" rating to a "sell" rating. 15.7%
4/22 BRIEF-Prothena Corporation Plc- Update On Prasinezumab Expected Later This Year [Reuters] 15.5%
4/3 Prothena Announces Inducement Grant Under Nasdaq Listing Rule 5635(c)(4) 14.7%
3/3 Prothena Announces Appointment of Brandon Smith as Chief Business Officer 6.9%
11/19 Prothena Co. PLC (NASDAQ: PRTA) was upgraded by analysts at Evercore ISI to an "outperform" rating. 5.5%
8/5 Form SC 13G Prothena Corp plc Filed by: GREAT POINT PARTNERS LLC 4.9%
10/30 Form 8-K/A Prothena Corp plc For: Oct 29 4.8%
5/7 Q1/2019 3/31/2019 EPS -0.520 ZacksConsensus -0.600 ActVsEst 0.080 - Beat 4.8%
12/21 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at ValuEngine from a "sell" rating to a "strong sell" rating. 4.4%
3/19 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at BidaskClub from a "hold" rating to a "sell" rating. 15.7%
4/22 BRIEF-Prothena Corporation Plc- Update On Prasinezumab Expected Later This Year [Reuters] 15.5%
4/3 Prothena Announces Inducement Grant Under Nasdaq Listing Rule 5635(c)(4) 14.7%
3/3 Prothena Announces Appointment of Brandon Smith as Chief Business Officer 6.9%
11/19 Prothena Co. PLC (NASDAQ: PRTA) was upgraded by analysts at Evercore ISI to an "outperform" rating. 5.5%
8/5 Form SC 13G Prothena Corp plc Filed by: GREAT POINT PARTNERS LLC 4.9%
10/30 Form 8-K/A Prothena Corp plc For: Oct 29 4.8%
5/7 Q1/2019 3/31/2019 EPS -0.520 ZacksConsensus -0.600 ActVsEst 0.080 - Beat 4.8%
12/21 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at ValuEngine from a "sell" rating to a "strong sell" rating. 4.4%
TOP News Decliners
5/10
Prothena (PRTA) Investor Presentation - Slideshow [Seeking Alpha]
-7.4%
8/15 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at BidaskClub from a "sell" rating to a "strong sell" rating. -6.7%
8/30 Prothena: Trading Below Cash, Key Clinical Readouts In Coming Year [Seeking Alpha] -5.4%
7/30 Prothena to Report Second Quarter 2019 Financial Results on August 6 -4.8%
2/14 Form SC 13G/A Prothena Corp plc Filed by: GREAT POINT PARTNERS LLC -4.8%
2/12 Q4/2019 12/31/2019 EPS -0.540 ZacksConsensus -0.650 ActVsEst 0.110 - Beat -4.4%
11/5 Form 8-K Prothena Corp plc For: Nov 05 -4.2%
4/21 Prothena Co. PLC (NASDAQ: PRTA) was upgraded by analysts at BidaskClub from a "hold" rating to a "buy" rating. -4.1%
1/23 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at BidaskClub from a "buy" rating to a "hold" rating. -3.7%
5/22 Form S-3 Prothena Corp plc -3.1%
8/15 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at BidaskClub from a "sell" rating to a "strong sell" rating. -6.7%
8/30 Prothena: Trading Below Cash, Key Clinical Readouts In Coming Year [Seeking Alpha] -5.4%
7/30 Prothena to Report Second Quarter 2019 Financial Results on August 6 -4.8%
2/14 Form SC 13G/A Prothena Corp plc Filed by: GREAT POINT PARTNERS LLC -4.8%
2/12 Q4/2019 12/31/2019 EPS -0.540 ZacksConsensus -0.650 ActVsEst 0.110 - Beat -4.4%
11/5 Form 8-K Prothena Corp plc For: Nov 05 -4.2%
4/21 Prothena Co. PLC (NASDAQ: PRTA) was upgraded by analysts at BidaskClub from a "hold" rating to a "buy" rating. -4.1%
1/23 Prothena Co. PLC (NASDAQ: PRTA) was downgraded by analysts at BidaskClub from a "buy" rating to a "hold" rating. -3.7%
5/22 Form S-3 Prothena Corp plc -3.1%
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