PRTA Insider Trading

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Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 28.10%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $20,055,152.52

Prothena Insider Trading History Chart

Prothena Share Price & Price History

^$21.19

▲ +0.32 (1.53%)

As of 04/29/2024 05:30 PM ET

Days: 30 | 90 | 365

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Prothena Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
1/24/2024	Karin L. Walker	CAO	Sell	5,000	$34.00	$170,000.00
12/20/2023	Karin L. Walker	CAO	Sell	5,000	$37.19	$185,950.00
11/30/2023	Karin L. Walker	CAO	Sell	5,000	$34.00	$170,000.00
10/25/2023	Karin L. Walker	CAO	Sell	5,000	$41.04	$205,200.00
10/11/2023	Brandon S. Smith	COO	Sell	4,000	$46.75	$187,000.00
10/4/2023	Carol D. Karp	insider	Sell	5,000	$46.62	$233,100.00
9/27/2023	Michael J. Malecek	insider	Sell	5,000	$47.38	$236,900.00
9/19/2023	Karin L. Walker	CAO	Sell	5,000	$52.36	$261,800.00
9/13/2023	Brandon S. Smith	COO	Sell	4,000	$55.49	$221,960.00
9/13/2023	Hideki Garren	insider	Sell	2,000	$55.48	$110,960.00
9/6/2023	Carol D. Karp	insider	Sell	5,000	$54.76	$273,800.00
8/30/2023	Michael J. Malecek	insider	Sell	5,000	$55.01	$275,050.00
8/18/2023	Karin L. Walker	CAO	Sell	5,000	$57.18	$285,900.00
8/16/2023	Brandon S. Smith	COO	Sell	4,000	$58.71	$234,840.00
8/16/2023	Hideki Garren	insider	Sell	2,000	$58.74	$117,480.00
8/2/2023	Wagner M. Zago	insider	Sell	4,000	$67.05	$268,200.00
7/26/2023	Michael J. Malecek	insider	Sell	5,000	$62.33	$311,650.00
7/19/2023	Karin L. Walker	CAO	Sell	5,000	$69.19	$345,950.00
7/12/2023	Brandon S. Smith	COO	Sell	4,000	$67.51	$270,040.00
7/12/2023	Hideki Garren	insider	Sell	2,000	$67.51	$135,020.00
7/5/2023	Carol D. Karp	insider	Sell	5,000	$68.13	$340,650.00
7/3/2023	Dennis J Selkoe	Director	Sell	5,000	$67.43	$337,150.00	2,845
6/28/2023	Michael J. Malecek	insider	Sell	5,000	$69.82	$349,100.00
6/16/2023	Hideki Garren	insider	Sell	7,331	$74.00	$542,494.00
6/14/2023	Brandon S. Smith	COO	Sell	5,333	$73.98	$394,535.34
6/14/2023	Hideki Garren	insider	Sell	4,669	$74.22	$346,533.18
6/7/2023	Wagner M. Zago	insider	Sell	19,000	$71.06	$1,350,140.00
5/31/2023	Michael J. Malecek	insider	Sell	5,000	$64.64	$323,200.00
5/19/2023	Karin L. Walker	CAO	Sell	5,000	$74.00	$370,000.00
5/17/2023	Gene G Kinney	CEO	Sell	45,000	$73.70	$3,316,500.00	12,793
5/17/2023	Tran Nguyen	CFO	Sell	95,000	$73.99	$7,029,050.00	3,200
5/3/2023	Dennis J Selkoe	Director	Sell	15,000	$57.00	$855,000.00	2,845
4/26/2023	Michael J. Malecek	insider	Sell	5,000	$53.46	$267,300.00
4/19/2023	Karin L. Walker	CAO	Sell	5,000	$52.90	$264,500.00
3/29/2023	Michael J. Malecek	insider	Sell	5,000	$49.02	$245,100.00
3/20/2023	Karin L. Walker	CAO	Sell	5,000	$47.72	$238,600.00
3/15/2023	Karin L. Walker	CAO	Sell	20,000	$48.42	$968,400.00
3/15/2023	Michael J. Malecek	insider	Sell	15,000	$48.44	$726,600.00
3/15/2023	Tran Nguyen	CFO	Sell	10,000	$48.43	$484,300.00	3,200
2/15/2023	Tran Nguyen	CFO	Sell	10,000	$53.34	$533,400.00	3,200
1/18/2023	Tran Nguyen	CFO	Sell	10,000	$55.53	$555,300.00	3,200
1/10/2023	Shane Cooke	Director	Sell	5,000	$52.92	$264,600.00
1/5/2023	Richard T Collier	Director	Sell	5,000	$52.67	$263,350.00	1,219
1/3/2023	Lars Ekman	Insider	Sell	15,834	$55.98	$886,387.32	243
12/21/2022	Tran Nguyen	CFO	Sell	10,000	$58.97	$589,700.00	3,200
12/12/2022	Shane Cooke	Director	Sell	5,000	$61.04	$305,200.00
12/5/2022	Richard T Collier	Director	Sell	5,000	$62.07	$310,350.00	1,219
11/30/2022	Michael J. Malecek	insider	Sell	5,000	$62.28	$311,400.00	243
11/23/2022	Tran Nguyen	CFO	Sell	10,000	$61.09	$610,900.00	3,200
11/18/2022	Karin L. Walker	CAO	Sell	10,000	$57.07	$570,700.00
11/10/2022	Shane Cooke	Director	Sell	5,000	$56.17	$280,850.00
11/7/2022	Richard T Collier	Director	Sell	5,000	$55.62	$278,100.00	1,219
11/1/2022	Lars Ekman	Insider	Sell	15,833	$62.88	$995,579.04	243
10/27/2022	Michael J. Malecek	insider	Sell	20,000	$62.00	$1,240,000.00
10/24/2022	Karin L. Walker	CAO	Sell	20,000	$57.23	$1,144,600.00
10/19/2022	Tran Nguyen	CFO	Sell	10,000	$56.44	$564,400.00	3,200
10/10/2022	Shane Cooke	Director	Sell	5,000	$55.91	$279,550.00
10/5/2022	Richard T Collier	Director	Sell	5,000	$57.92	$289,600.00	1,219
10/3/2022	Hideki Garren	insider	Sell	4,000	$60.90	$243,600.00	243
9/28/2022	Gene G Kinney	CEO	Sell	16,412	$53.38	$876,072.56	12,793
9/28/2022	Lars Ekman	Insider	Sell	31,666	$48.09	$1,522,817.94	243
9/28/2022	Shane Cooke	Director	Sell	10,000	$48.09	$480,900.00	1,219
9/21/2022	Gene G Kinney	CEO	Sell	2,720	$32.02	$87,094.40	12,793
9/21/2022	Tran Nguyen	CFO	Sell	10,000	$30.75	$307,500.00	3,200
9/15/2022	Hideki Garren	insider	Sell	4,000	$30.00	$120,000.00
8/24/2022	Tran Nguyen	CFO	Sell	10,000	$30.17	$301,700.00	3,200
8/17/2022	Gene G Kinney	CEO	Sell	2,181	$32.03	$69,857.43	12,793
8/12/2022	Gene G Kinney	CEO	Sell	20,284	$32.16	$652,333.44	12,793
8/10/2022	Gene G Kinney	CEO	Sell	991	$32.01	$31,721.91	12,793
8/5/2022	Gene G Kinney	CEO	Sell	21,506	$32.83	$706,041.98	12,793
8/1/2022	Hideki Garren	insider	Sell	4,000	$30.52	$122,080.00
7/27/2022	Gene G Kinney	CEO	Sell	376	$32.00	$12,032.00	12,793
7/22/2022	Tran Nguyen	CFO	Sell	7,320	$32.55	$238,266.00	3,200
7/20/2022	Shane Cooke	Director	Sell	15,000	$32.90	$493,500.00
7/20/2022	Tran Nguyen	CFO	Sell	42,120	$32.49	$1,368,478.80	3,200
7/6/2022	Hideki Garren	insider	Sell	8,000	$30.00	$240,000.00
5/5/2022	Ecor1 Capital, Llc	Major Shareholder	Buy	1,062,736	$29.02	$30,840,598.72	11,584,280
4/11/2022	Shane Cooke	Director	Sell	5,000	$35.08	$175,400.00
4/5/2022	Richard T Collier	Director	Sell	5,000	$39.41	$197,050.00	1,219
1/12/2022	Ecor1 Capital, Llc	Major Shareholder	Buy	300,000	$37.50	$11,250,000.00
1/3/2022	Dennis J Selkoe	Director	Sell	5,000	$47.45	$237,250.00
11/23/2021	Karin L. Walker	CAO	Sell	4,519	$57.88	$261,559.72
11/19/2021	Michael J. Malecek	Insider	Sell	10,000	$55.00	$550,000.00
11/1/2021	Carol D. Karp	Insider	Sell	10,000	$57.18	$571,800.00
10/27/2021	Michael J. Malecek	Insider	Sell	10,000	$58.52	$585,200.00
10/20/2021	Karin L. Walker	CAO	Sell	23,000	$60.25	$1,385,750.00
10/1/2021	Carol D. Karp	Insider	Sell	10,000	$68.23	$682,300.00
10/1/2021	Dennis J Selkoe	Director	Sell	5,000	$67.84	$339,200.00
7/30/2021	Dennis J. Selkoe	Director	Sell	5,000	$49.47	$247,350.00	6,345
7/14/2021	Christopher S. Henney	Director	Sell	11,108	$55.46	$616,049.68	11,108
7/12/2021	Christopher S. Henney	Director	Sell	23,892	$55.51	$1,326,244.92	17,500
6/25/2021	Christopher S. Henney	Director	Sell	12,000	$47.73	$572,760.00	12,000
6/22/2021	Wagner M. Zago	Insider	Sell	115,250	$46.15	$5,318,787.50	15,000

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SEC Filings (Institutional Ownership Changes) for Prothena (NASDAQ:PRTA)

97.08% of Prothena stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Prothena Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
4/29/2024	China Universal Asset Management Co. Ltd.	10,360	$0.26M	0.0%	+67.0%	0.019%
4/29/2024	HighMark Wealth Management LLC	16,502	$0.41M	0.3%	+124.5%	0.031%
4/26/2024	Pinnacle Associates Ltd.	125,264	$3.10M	0.0%	-0.4%	0.233%
3/22/2024	PNC Financial Services Group Inc.	1,544	$56K	0.0%	+265.9%	0.003%
3/5/2024	Wellington Management Group LLP	2,594,102	$94.27M	0.0%	+21.1%	4.829%
2/16/2024	Price T Rowe Associates Inc. MD	4,237,351	$153.99M	0.0%	+10.9%	7.895%
2/15/2024	PFM Health Sciences LP	189,744	$6.90M	0.4%	-77.3%	0.354%
2/15/2024	Granahan Investment Management LLC	417,157	$15.16M	0.5%	+19.9%	0.777%
2/15/2024	Boxer Capital LLC	665,000	$24.17M	1.2%	+6.4%	1.239%
2/14/2024	ADAR1 Capital Management LLC	6,102	$0.22M	0.1%	N/A	0.011%
2/14/2024	First Light Asset Management LLC	1,088,801	$39.57M	3.2%	-27.1%	2.029%
2/14/2024	Seven Eight Capital LP	56,946	$2.07M	0.2%	N/A	0.106%
2/14/2024	Sectoral Asset Management Inc.	46,777	$1.70M	0.7%	-72.9%	0.087%
2/13/2024	DCF Advisers LLC	84,000	$3.05M	1.7%	+1.3%	0.157%
2/13/2024	Armistice Capital LLC	278,000	$10.10M	0.1%	N/A	0.518%
2/13/2024	Rafferty Asset Management LLC	207,419	$7.54M	0.0%	+32.2%	0.386%
2/12/2024	TD Asset Management Inc	146,538	$5.33M	0.0%	-15.1%	0.273%
2/9/2024	Trexquant Investment LP	67,683	$2.46M	0.1%	+19.1%	0.126%
2/9/2024	Dynamic Technology Lab Private Ltd	26,476	$0.96M	0.1%	N/A	0.049%
2/8/2024	Thornburg Investment Management Inc.	25,591	$0.93M	0.0%	-9.5%	0.048%
2/7/2024	Principal Financial Group Inc.	30,973	$1.13M	0.0%	+21.1%	0.058%
2/7/2024	Dimensional Fund Advisors LP	867,635	$31.53M	0.0%	-21.3%	1.617%
2/7/2024	Jump Financial LLC	6,457	$0.24M	0.0%	-89.8%	0.012%
2/7/2024	Teacher Retirement System of Texas	9,266	$0.34M	0.0%	-17.5%	0.017%
2/7/2024	E Fund Management Co. Ltd.	11,096	$0.40M	0.0%	+37.7%	0.021%
2/6/2024	Charles Schwab Investment Management Inc.	313,230	$11.38M	0.0%	+1.5%	0.584%
2/6/2024	Swiss National Bank	79,200	$2.88M	0.0%	-9.0%	0.148%
2/1/2024	New York State Common Retirement Fund	33,648	$1.22M	0.0%	+8.6%	0.063%
2/1/2024	Handelsbanken Fonder AB	61,400	$2.23M	0.0%	+4.2%	0.114%
1/30/2024	HealthInvest Partners AB	8,342	$0.30M	0.2%	N/A	0.016%
1/30/2024	Zurcher Kantonalbank Zurich Cantonalbank	9,563	$0.35M	0.0%	+28.1%	0.018%
1/30/2024	Strs Ohio	10,700	$0.39M	0.0%	+55.1%	0.020%
1/25/2024	Allspring Global Investments Holdings LLC	1,947	$71K	0.0%	-37.1%	0.004%
1/25/2024	Nisa Investment Advisors LLC	900	$33K	0.0%	-40.4%	0.002%
1/24/2024	Mirae Asset Global Investments Co. Ltd.	27,751	$1.01M	0.0%	+8.2%	0.052%
1/24/2024	China Universal Asset Management Co. Ltd.	6,203	$0.23M	0.0%	+351.1%	0.012%
1/19/2024	Pinnacle Associates Ltd.	125,747	$4.57M	0.1%	+0.6%	0.234%
1/12/2024	SG Americas Securities LLC	135,857	$4.94M	0.0%	+46.9%	0.253%
12/18/2023	Vanguard Group Inc.	1,030,774	$49.74M	0.0%	-1.0%	1.921%
12/7/2023	Hudson Bay Capital Management LP	32,500	$1.57M	0.0%	N/A	0.061%
12/1/2023	Wellington Management Group LLP	2,141,647	$103.33M	0.0%	-3.1%	3.990%
11/15/2023	Rock Springs Capital Management LP	614,298	$29.64M	0.8%	-18.5%	1.145%
11/15/2023	Sectoral Asset Management Inc.	172,407	$8.32M	1.6%	+13.5%	0.321%
11/15/2023	Alps Advisors Inc.	39,524	$1.91M	0.0%	+1.9%	0.074%
11/15/2023	Affinity Asset Advisors LLC	79,214	$3.82M	1.1%	-20.8%	0.148%
11/14/2023	Corton Capital Inc.	9,091	$0.44M	0.2%	+20.7%	0.017%
11/14/2023	Avidity Partners Management LP	382,305	$18.45M	0.7%	-28.5%	0.712%
11/14/2023	Qube Research & Technologies Ltd	84,653	$4.09M	0.0%	+104.5%	0.158%
11/14/2023	Trexquant Investment LP	56,843	$2.74M	0.1%	N/A	0.106%
11/14/2023	Profund Advisors LLC	26,634	$1.29M	0.1%	+20.8%	0.050%
11/13/2023	Connor Clark & Lunn Investment Management Ltd.	127,775	$6.17M	0.0%	+16.0%	0.238%
11/13/2023	Algert Global LLC	28,000	$1.35M	0.1%	N/A	0.052%
11/13/2023	Northern Trust Corp	409,847	$19.78M	0.0%	-0.5%	0.764%
11/13/2023	Healthcare of Ontario Pension Plan Trust Fund	30,500	$1.47M	0.0%	N/A	0.057%
11/13/2023	Mariner LLC	167,932	$8.10M	0.0%	+24.3%	0.313%
11/13/2023	Silverarc Capital Management LLC	26,629	$1.29M	0.4%	-46.4%	0.050%
11/13/2023	Aigen Investment Management LP	34,890	$1.68M	0.3%	N/A	0.065%
11/13/2023	FMR LLC	8,030,290	$387.46M	0.0%	+1.5%	14.962%
11/13/2023	Rafferty Asset Management LLC	156,840	$7.57M	0.0%	+31.2%	0.292%
11/13/2023	E Fund Management Co. Ltd.	8,059	$0.39M	0.0%	+25.4%	0.015%
11/9/2023	Rhumbline Advisers	62,451	$3.01M	0.0%	+2.7%	0.116%
11/9/2023	Deutsche Bank AG	22,613	$1.09M	0.0%	+14.5%	0.042%
11/9/2023	Citigroup Inc.	67,930	$3.28M	0.0%	+42.9%	0.127%
11/9/2023	Headlands Technologies LLC	1,531	$74K	0.0%	N/A	0.003%
11/9/2023	UBS Group AG	45,252	$2.18M	0.0%	+102.2%	0.084%
11/8/2023	State of New Jersey Common Pension Fund D	45,952	$2.22M	0.0%	+27.4%	0.086%
11/8/2023	Charles Schwab Investment Management Inc.	308,537	$14.89M	0.0%	-1.3%	0.576%
11/8/2023	Swiss National Bank	87,000	$4.20M	0.0%	+1.3%	0.163%
11/8/2023	Moody Aldrich Partners LLC	23,904	$1.15M	0.2%	-36.4%	0.045%
11/8/2023	Oppenheimer & Co. Inc.	7,908	$0.38M	0.0%	+3.9%	0.015%
11/7/2023	Barclays PLC	86,035	$4.15M	0.0%	+26.9%	0.161%
11/7/2023	Fox Run Management L.L.C.	9,617	$0.46M	0.1%	N/A	0.018%
11/7/2023	Jump Financial LLC	63,117	$3.05M	0.1%	+167.1%	0.118%
11/6/2023	Victory Capital Management Inc.	8,781	$0.42M	0.0%	-66.6%	0.016%
11/2/2023	Principal Financial Group Inc.	25,582	$1.23M	0.0%	-65.6%	0.048%
10/31/2023	Teacher Retirement System of Texas	11,231	$0.54M	0.0%	+4.9%	0.021%
10/31/2023	Jennison Associates LLC	55,579	$2.68M	0.0%	+12.9%	0.104%
10/31/2023	China Universal Asset Management Co. Ltd.	1,375	$66K	0.0%	+99.0%	0.003%
10/27/2023	Allspring Global Investments Holdings LLC	3,096	$0.15M	0.0%	+58.3%	0.006%
10/27/2023	TD Asset Management Inc	172,682	$8.33M	0.0%	+93.1%	0.323%
10/26/2023	Mirae Asset Global Investments Co. Ltd.	25,652	$1.24M	0.0%	+14.4%	0.048%
10/26/2023	Strs Ohio	6,900	$0.33M	0.0%	-46.9%	0.013%
10/25/2023	Zurcher Kantonalbank Zurich Cantonalbank	7,464	$0.36M	0.0%	+12.0%	0.014%
10/24/2023	Bank of New York Mellon Corp	499,382	$24.10M	0.0%	-2.9%	0.933%
10/24/2023	Raymond James & Associates	8,167	$0.39M	0.0%	+98.4%	0.015%
10/24/2023	Pinnacle Associates Ltd.	125,006	$6.03M	0.1%	-4.2%	0.234%
10/13/2023	SG Americas Securities LLC	92,494	$4.46M	0.1%	+2,501.8%	0.173%
9/21/2023	Barclays PLC	67,812	$4.63M	0.0%	+5.0%	0.127%
8/24/2023	Perceptive Advisors LLC	184,615	$12.61M	0.4%	-22.3%	0.345%
8/21/2023	Affinity Asset Advisors LLC	100,000	$6.83M	2.4%	N/A	0.187%
8/15/2023	Silverarc Capital Management LLC	49,721	$3.40M	1.1%	N/A	0.093%
8/14/2023	NinePointTwo Capital LLC	3,741	$0.26M	0.1%	-34.8%	0.007%
8/14/2023	Maple Rock Capital Partners Inc.	234,584	$16.02M	1.3%	-20.1%	0.438%
8/14/2023	West Tower Group LLC	659	$45K	0.0%	N/A	0.001%
8/14/2023	UniSuper Management Pty Ltd	110,884	$7.57M	0.1%	N/A	0.207%
8/14/2023	Prosight Management LP	120,000	$8.19M	2.5%	-73.2%	0.224%
8/14/2023	Granahan Investment Management LLC	295,057	$20.15M	0.6%	+26.8%	0.551%
8/11/2023	Renaissance Technologies LLC	323,800	$22.11M	0.0%	-20.5%	0.605%
8/11/2023	Ameritas Investment Partners Inc.	3,423	$0.23M	0.0%	+8.9%	0.006%
8/11/2023	Harvest Investment Services LLC	11,772	$0.80M	0.5%	+8.8%	0.022%

Data available starting January 2016

Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation in the United States. The company is involved in developing birtamimab, an investigational humanized antibody that is in Phase III clinical trial for the treatment of AL amyloidosis; Prasinezumab, a humanized monoclonal antibody, for the treatment of Parkinson's disease and other related synucleinopathies which is in Phase IIb clinical trial; NNC6019 that is in Phase lI clinical trial for the treatment of ATTR amyloidosis; and BMS-986446 and PRX012, which is in Phase I clinical trial for the treatment of Alzheimer's disease. Its discovery and preclinical programs include PRX123, a dual Aß-Tau vaccine for the treatment and prevention of Alzheimer's disease; and PRX019 for the treatment of neurogenerative diseases, as well as TDP-43 for the treatment of amyotrophic lateral sclerosis. Prothena Corporation plc has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target a-synuclein, including prasinezumab; and a collaboration agreement with Bristol-Myers Squibb to develop and commercialize antibodies targeting tau, TDP-43. The company was incorporated in 2012 and is based in Dublin, Ireland.

Today's Range

Now: $21.19

$20.91

$22.09

50 Day Range

MA: $25.22

$20.56

$30.30

52 Week Range

Now: $21.19

$19.65

$79.65

Volume

600,639 shs

Average Volume

746,547 shs

Market Capitalization

$1.14 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.21

Who are the company insiders with the largest holdings of Prothena?: Prothena's top insider shareholders include:
Ecor1 Capital, Llc (Major Shareholder)
Gene G Kinney (CEO)
Tran Nguyen (CFO)
Dennis J Selkoe (Director)
Richard T Collier (Director)
Shane Cooke (Director)
Hideki Garren (Insider)
Lars Ekman (Insider)
Michael J Malecek (Insider)
Brandon S Smith (COO)
Carol D Karp (Insider)
Karin L Walker (CAO)
Wagner M Zago (Insider)
Learn More about top insider investors at Prothena.
Who are the major institutional investors of Prothena?: Prothena's top institutional shareholders include:
Pinnacle Associates Ltd. — 0.23%
HighMark Wealth Management LLC — 0.03%
China Universal Asset Management Co. Ltd. — 0.02%
Learn More about top institutional investors of Prothena stock.
Which major investors are selling Prothena stock?: During the previous quarter, PRTA stock was sold by these institutional investors:
Pinnacle Associates Ltd.
Within the previous year, company insiders that have sold Prothena company stock include:
Ecor1 Capital, Llc (Major Shareholder)
Gene G Kinney (CEO)
Tran Nguyen (CFO)
Dennis J Selkoe (Director)
Richard T Collier (Director)
Shane Cooke (Director)
Hideki Garren (Insider)
Lars Ekman (Insider)
Michael J Malecek (Insider)
Learn More investors selling Prothena stock.
Which major investors are buying Prothena stock?: In the last quarter, PRTA stock was acquired by institutional investors including:
HighMark Wealth Management LLC
China Universal Asset Management Co. Ltd.