PRTA Insider Trading

Insider Trading Chart
Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 28.20%

Insider Buying (Last 12 Months): $0.00

Insider Selling (Last 12 Months): $170,000.00

Prothena Insider Trading History Chart

Prothena Share Price & Price History

^$15.22

▼ -0.79 (-4.93%)

As of 12/20/2024 06:51 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

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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
11/19/2024	Barclays PLC	95,222	$1.59M	0.0%	+110.2%	0.177%
11/16/2024	Geode Capital Management LLC	963,479	$16.12M	0.0%	-3.1%	1.792%
11/15/2024	Barclays PLC	95,222	$1.59M	0.0%	+110.2%	0.177%
11/15/2024	Orion Portfolio Solutions LLC	17,531	$0.29M	0.0%	+4.4%	0.033%
11/15/2024	XTX Topco Ltd	15,564	$0.26M	0.0%	N/A	0.029%
11/15/2024	Wellington Management Group LLP	4,178,788	$69.91M	0.0%	+14.8%	7.770%
11/15/2024	State Street Corp	1,674,909	$28.02M	0.0%	-13.3%	3.114%
11/15/2024	Systematic Financial Management LP	8,125	$0.14M	0.0%	-95.8%	0.015%
11/15/2024	Janus Henderson Group PLC	18,047	$0.30M	0.0%	-98.2%	0.034%
11/14/2024	PDT Partners LLC	110,654	$1.85M	0.2%	+7.7%	0.206%
11/14/2024	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	526,748	$8.81M	0.0%	+1,122.9%	0.979%
11/13/2024	BNP Paribas Financial Markets	55,842	$0.93M	0.0%	+44.6%	0.104%
11/13/2024	FMR LLC	8,066,983	$134.96M	0.0%	+0.0%	15.000%
11/13/2024	The Manufacturers Life Insurance Company	86,071	$1.44M	0.0%	+3.8%	0.160%
11/13/2024	Dynamic Technology Lab Private Ltd	25,764	$0.43M	0.0%	N/A	0.048%
11/12/2024	Algert Global LLC	72,961	$1.22M	0.0%	-5.5%	0.136%
11/12/2024	Charles Schwab Investment Management Inc.	324,962	$5.44M	0.0%	-0.7%	0.604%
11/9/2024	Primecap Management Co. CA	35,500	$0.59M	0.0%	-2.7%	0.066%
11/9/2024	Intech Investment Management LLC	12,555	$0.21M	0.0%	N/A	0.023%
11/8/2024	Connor Clark & Lunn Investment Management Ltd.	122,492	$2.05M	0.0%	+8.6%	0.228%
11/5/2024	GSA Capital Partners LLP	28,941	$0.48M	0.0%	N/A	0.054%
10/25/2024	Pinnacle Associates Ltd.	125,747	$2.10M	0.0%	+2.3%	0.234%
10/25/2024	China Universal Asset Management Co. Ltd.	10,344	$0.17M	0.0%	+63.7%	0.019%
10/11/2024	Creative Planning	20,907	$0.35M	0.0%	N/A	0.039%
10/3/2024	Duncan Williams Asset Management LLC	48,749	$0.82M	0.4%	N/A	0.091%
10/3/2024	SG Americas Securities LLC	14,087	$0.24M	0.0%	-74.2%	0.026%
8/16/2024	Systematic Financial Management LP	193,763	$4M	0.1%	+25.8%	0.360%
8/16/2024	Algert Global LLC	77,191	$1.59M	0.1%	+59.7%	0.144%
8/15/2024	Armistice Capital LLC	1,560,000	$32.20M	0.4%	+42.3%	2.901%
8/14/2024	Profund Advisors LLC	18,073	$0.37M	0.0%	-61.4%	0.034%
8/13/2024	Ensign Peak Advisors Inc	21,643	$0.45M	0.0%	+30.4%	0.040%
8/13/2024	Thrivent Financial for Lutherans	47,515	$0.98M	0.0%	-4.1%	0.088%
8/13/2024	DCF Advisers LLC	107,500	$2.22M	1.1%	+0.5%	0.200%
8/9/2024	Renaissance Technologies LLC	329,500	$6.80M	0.0%	-15.4%	0.613%
8/9/2024	Dimensional Fund Advisors LP	861,584	$17.78M	0.0%	-0.1%	1.602%
8/8/2024	Federated Hermes Inc.	43,861	$0.91M	0.0%	N/A	0.082%
8/7/2024	Headlands Technologies LLC	1,675	$35K	0.0%	-56.8%	0.003%
8/5/2024	Arizona State Retirement System	9,776	$0.20M	0.0%	-11.6%	0.018%
8/3/2024	TD Asset Management Inc	100,694	$2.08M	0.0%	-13.4%	0.187%
8/1/2024	Rhumbline Advisers	69,756	$1.44M	0.0%	+9.9%	0.130%
7/31/2024	Focused Wealth Management Inc	20,129	$0.42M	0.1%	+98.7%	0.037%
7/30/2024	Pinnacle Associates Ltd.	122,900	$2.54M	0.0%	-1.9%	0.229%
7/30/2024	Signaturefd LLC	1,337	$28K	0.0%	+182.1%	0.002%
7/29/2024	Zurcher Kantonalbank Zurich Cantonalbank	10,236	$0.21M	0.0%	+13.1%	0.019%
7/26/2024	Bank of New York Mellon Corp	165,423	$3.41M	0.0%	+13.4%	0.308%
7/12/2024	SG Americas Securities LLC	54,572	$1.13M	0.0%	+226.4%	0.101%
5/28/2024	Teachers Retirement System of The State of Kentucky	14,039	$0.35M	0.0%	+26.0%	0.026%
5/17/2024	Artal Group S.A.	1,001,360	$24.80M	0.6%	+99.7%	1.862%
5/16/2024	California State Teachers Retirement System	40,442	$1M	0.0%	-5.3%	0.075%
5/16/2024	Janus Henderson Group PLC	1,309,590	$32.44M	0.0%	-35.7%	2.436%
5/15/2024	First Light Asset Management LLC	444,953	$11.02M	0.8%	-59.1%	0.828%
5/15/2024	Price T Rowe Associates Inc. MD	4,201,771	$104.08M	0.0%	-0.8%	7.814%
5/13/2024	Seven Eight Capital LP	41,120	$1.02M	0.1%	-27.8%	0.076%
5/10/2024	Vanguard Group Inc.	1,125,283	$27.87M	0.0%	+5.1%	2.095%
5/9/2024	State Board of Administration of Florida Retirement System	11,286	$0.28M	0.0%	-5.3%	0.021%
5/8/2024	Focused Wealth Management Inc	10,129	$0.25M	0.0%	+7,751.9%	0.019%
5/8/2024	ProShare Advisors LLC	11,346	$0.28M	0.0%	+8.9%	0.021%
5/8/2024	Headlands Technologies LLC	3,881	$96K	0.0%	N/A	0.007%
5/7/2024	Susquehanna Fundamental Investments LLC	13,818	$0.34M	0.0%	N/A	0.026%
5/7/2024	SG Americas Securities LLC	16,720	$0.41M	0.0%	-87.7%	0.031%
5/1/2024	BNP Paribas Financial Markets	32,253	$0.80M	0.0%	-65.4%	0.060%
4/29/2024	Principal Financial Group Inc.	11,737	$0.29M	0.0%	-62.1%	0.022%
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%

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: $15.22

$15.10

$16.42

50 Day Range

MA: $15.69

$11.95

$18.35

52 Week Range

Now: $15.22

$11.70

$41.54

Volume

1,557,225 shs

Average Volume

592,325 shs

Market Capitalization

$818.97 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.09

Who are the company insiders with the largest holdings of Prothena?: Prothena's top insider shareholders include:
Gene G Kinney (CEO)
Tran Nguyen (CFO)
Dennis J Selkoe (Director)
Richard T Collier (Director)
Lars Ekman (Insider)
Brandon S Smith (COO)
Carol D Karp (Insider)
Hideki Garren (Insider)
Karin L Walker (CAO)
Michael J Malecek (Insider)
Shane Cooke (Director)
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:
FMR LLC — 15.00%
Wellington Management Group LLP — 7.77%
State Street Corp — 3.11%
Geode Capital Management LLC — 1.79%
UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC — 0.98%
Charles Schwab Investment Management Inc. — 0.60%
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:
Janus Henderson Group PLC
State Street Corp
Systematic Financial Management LP
SG Americas Securities LLC
Geode Capital Management LLC
Walleye Capital LLC
Algert Global LLC
Charles Schwab Investment Management Inc.
Which major investors are buying Prothena stock?: In the last quarter, PRTA stock was bought by institutional investors including:
Wellington Management Group LLP
UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
Barclays PLC
Barclays PLC
Duncan Williams Asset Management LLC
GSA Capital Partners LLP
Dynamic Technology Lab Private Ltd
Creative Planning