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): $20,586,952.52

Prothena Insider Trading History Chart

Prothena Share Price & Price History

^$21.99

▼ -0.25 (-1.12%)

As of 04/15/2024 01:00 AM 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
3/22/2024	PNC Financial Services Group Inc.	1,544	$56K	0.0%	+265.9%	0.003%
3/11/2024	Vanguard Group Inc.	1,070,555	$38.90M	0.0%	+3.9%	1.993%
3/5/2024	Wellington Management Group LLP	2,594,102	$94.27M	0.0%	+21.1%	4.829%
3/1/2024	Goldman Sachs Group Inc.	333,786	$12.13M	0.0%	+33.3%	0.621%
2/16/2024	Price T Rowe Associates Inc. MD	4,237,351	$153.99M	0.0%	+10.9%	7.895%
2/16/2024	GSA Capital Partners LLP	34,850	$1.27M	0.1%	N/A	0.065%
2/15/2024	Exome Asset Management LLC	36,384	$1.32M	1.3%	N/A	0.068%
2/15/2024	Palo Alto Investors LP	1,660,057	$60.33M	5.4%	+0.2%	3.093%
2/15/2024	Pier Capital LLC	56,829	$2.07M	0.3%	-1.1%	0.106%
2/15/2024	Virtus ETF Advisers LLC	2,373	$86K	0.1%	+73.0%	0.004%
2/15/2024	Barclays PLC	142,607	$5.18M	0.0%	+65.8%	0.266%
2/15/2024	Vanguard Group Inc.	1,070,555	$38.90M	0.0%	+3.9%	1.995%
2/15/2024	Voya Investment Management LLC	46,262	$1.68M	0.0%	-49.0%	0.086%
2/15/2024	Vident Advisory LLC	5,639	$0.21M	0.0%	N/A	0.011%
2/15/2024	Nuveen Asset Management LLC	300,819	$10.93M	0.0%	-31.2%	0.560%
2/15/2024	PFM Health Sciences LP	189,744	$6.90M	0.4%	-77.3%	0.354%
2/15/2024	Prelude Capital Management LLC	8,600	$0.31M	0.0%	N/A	0.016%
2/15/2024	Price T Rowe Associates Inc. MD	4,237,351	$153.99M	0.0%	+10.9%	7.895%
2/15/2024	Profund Advisors LLC	33,754	$1.23M	0.1%	+26.7%	0.063%
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	Royal Bank of Canada	9,883	$0.36M	0.0%	+16.8%	0.018%
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	Cubist Systematic Strategies LLC	9,879	$0.36M	0.0%	N/A	0.018%
2/14/2024	Putnam Investments LLC	66,516	$2.42M	0.0%	+17.5%	0.124%
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%
2/14/2024	Schroder Investment Management Group	15,453	$0.56M	0.0%	+265.1%	0.029%
2/13/2024	Northern Trust Corp	404,110	$14.69M	0.0%	-1.4%	0.753%
2/13/2024	Public Employees Retirement Association of Colorado	6,552	$0.24M	0.0%	-28.8%	0.012%
2/13/2024	Oppenheimer & Co. Inc.	6,326	$0.23M	0.0%	-20.0%	0.012%
2/13/2024	Tower Research Capital LLC TRC	5,019	$0.18M	0.0%	+259.0%	0.009%
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	Goldman Sachs Group Inc.	333,786	$12.13M	0.0%	+33.3%	0.622%
2/13/2024	Rafferty Asset Management LLC	207,419	$7.54M	0.0%	+32.2%	0.386%
2/13/2024	The Manufacturers Life Insurance Company	85,622	$3.11M	0.0%	+4.4%	0.160%
2/13/2024	KBC Group NV	930	$34K	0.0%	N/A	0.002%
2/13/2024	California State Teachers Retirement System	42,710	$1.55M	0.0%	-3.2%	0.080%
2/12/2024	TD Asset Management Inc	146,538	$5.33M	0.0%	-15.1%	0.273%
2/9/2024	Orion Portfolio Solutions LLC	9,360	$0.33M	0.0%	N/A	0.017%
2/9/2024	US Bancorp DE	1,161	$42K	0.0%	-72.2%	0.002%
2/9/2024	Cambridge Investment Research Advisors Inc.	5,985	$0.22M	0.0%	N/A	0.011%
2/9/2024	Trexquant Investment LP	67,683	$2.46M	0.1%	+19.1%	0.126%
2/9/2024	UBS Group AG	132,497	$4.82M	0.0%	+192.8%	0.247%
2/9/2024	PNC Financial Services Group Inc.	1,544	$56K	0.0%	+265.9%	0.003%
2/9/2024	Dynamic Technology Lab Private Ltd	26,476	$0.96M	0.1%	N/A	0.049%
2/9/2024	Norges Bank	104,564	$3.80M	0.0%	N/A	0.195%
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%
12/6/2023	Citigroup Inc.	67,930	$3.28M	0.0%	+42.9%	0.127%
12/1/2023	Wellington Management Group LLP	2,141,647	$103.33M	0.0%	-3.1%	3.990%
11/24/2023	Deutsche Bank AG	22,613	$1.09M	0.0%	+14.5%	0.042%
11/15/2023	The Manufacturers Life Insurance Company	82,031	$3.96M	0.0%	+25.4%	0.153%
11/15/2023	Royal Bank of Canada	8,463	$0.41M	0.0%	+3.5%	0.016%
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	Sei Investments Co.	4,717	$0.23M	0.0%	-33.6%	0.009%
11/15/2023	JPMorgan Chase & Co.	402,031	$19.40M	0.0%	-1.7%	0.749%
11/15/2023	Legal & General Group Plc	38,502	$1.86M	0.0%	+2.0%	0.072%
11/15/2023	Alps Advisors Inc.	39,524	$1.91M	0.0%	+1.9%	0.074%
11/15/2023	Ameriprise Financial Inc.	11,063	$0.53M	0.0%	-7.2%	0.021%
11/15/2023	Affinity Asset Advisors LLC	79,214	$3.82M	1.1%	-20.8%	0.148%
11/15/2023	AQR Capital Management LLC	18,509	$0.89M	0.0%	-4.0%	0.034%
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	California State Teachers Retirement System	44,132	$2.13M	0.0%	-9.0%	0.082%
11/14/2023	Tower Research Capital LLC TRC	1,398	$67K	0.0%	-44.9%	0.003%
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	Invesco Ltd.	30,717	$1.48M	0.0%	-52.0%	0.057%
11/13/2023	FMR LLC	8,030,290	$387.46M	0.0%	+1.5%	14.962%

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: $21.99

$21.59

$22.44

50 Day Range

MA: $26.43

$21.99

$30.30

52 Week Range

Now: $21.99

$21.59

$79.65

Volume

530,668 shs

Average Volume

551,030 shs

Market Capitalization

$1.18 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.