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PRTA Insider Trading

Insider Trading Chart
Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 31.20%

Insider Buying (Last 12 Months): $30,840,598.72

Insider Selling (Last 12 Months): $20,938,312.82

Prothena Insider Trading History Chart

Prothena Share Price & Price History

^$48.23

▲ +0.57 (1.20%)

As of 03/31/2023 12:56 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
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
3/24/2021	Ecor1 Capital, Llc	Major Shareholder	Buy	875,000	$20.75	$18,156,250.00
2/23/2021	Ecor1 Capital, Llc	Major Shareholder	Buy	44,400	$21.05	$934,620.00
2/18/2021	Wagner M. Zago	Insider	Sell	7,540	$25.50	$192,270.00	7,540

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

91.72% 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
3/27/2023	Neo Ivy Capital Management	15,120	$0.91M	0.6%	N/A	0.029%
2/28/2023	Voya Investment Management LLC	38,000	$2.29M	0.0%	+38.7%	0.079%
2/21/2023	Macquarie Group Ltd.	28,569	$1.72M	0.0%	+3,195.2%	0.059%
2/16/2023	Alliancebernstein L.P.	44,866	$2.70M	0.0%	-1.1%	0.093%
2/16/2023	Point72 Middle East FZE	791	$48K	0.0%	N/A	0.002%
2/15/2023	Captrust Financial Advisors	3,976	$0.24M	0.0%	N/A	0.008%
2/15/2023	Kiwi Wealth Investments Limited Partnership	7,121	$0.43M	0.0%	-57.9%	0.015%
2/15/2023	Silverarc Capital Management LLC	71,706	$4.32M	1.2%	-31.7%	0.148%
2/15/2023	State of Wisconsin Investment Board	32,995	$1.99M	0.0%	-33.1%	0.068%
2/15/2023	Schonfeld Strategic Advisors LLC	28,128	$1.70M	0.0%	-37.2%	0.058%
2/15/2023	Squarepoint Ops LLC	5,516	$0.33M	0.0%	N/A	0.011%
2/15/2023	T. Rowe Price Investment Management Inc.	927,959	$55.91M	0.0%	+9.4%	1.918%
2/15/2023	Millennium Management LLC	213,610	$12.87M	0.0%	+128.6%	0.442%
2/15/2023	Morgan Stanley	180,403	$10.87M	0.0%	+8.4%	0.373%
2/15/2023	Man Group plc	23,697	$1.43M	0.0%	-53.3%	0.049%
2/15/2023	Mariner LLC	26,927	$1.62M	0.0%	+58.1%	0.056%
2/15/2023	Norges Bank	59,259	$3.57M	0.0%	N/A	0.122%
2/15/2023	EAM Investors LLC	53,346	$3.21M	0.7%	-0.5%	0.110%
2/15/2023	First Light Asset Management LLC	1,535,599	$92.52M	8.6%	-0.2%	3.174%
2/15/2023	Algert Global LLC	19,203	$1.16M	0.1%	+121.5%	0.040%
2/15/2023	Alps Advisors Inc.	32,776	$1.98M	0.0%	+28.1%	0.068%
2/15/2023	Avidity Partners Management LP	2,953,000	$177.92M	3.9%	+50.1%	6.104%
2/14/2023	Point72 Asset Management L.P.	311,500	$18.77M	0.1%	+85.0%	0.644%
2/14/2023	Price T Rowe Associates Inc. MD	3,205,903	$193.16M	0.0%	+7.5%	6.627%
2/14/2023	Putnam Investments LLC	65,394	$3.94M	0.0%	+343.2%	0.135%
2/14/2023	Amundi	2,781	$0.16M	0.0%	-8.2%	0.006%
2/14/2023	Two Sigma Advisers LP	327,000	$19.70M	0.1%	-2.4%	0.676%
2/14/2023	Two Sigma Investments LP	203,435	$12.26M	0.0%	+49.9%	0.421%
2/14/2023	Pura Vida Investments LLC	64,000	$3.86M	0.2%	N/A	0.132%
2/14/2023	Granahan Investment Management LLC	199,926	$12.05M	0.4%	+41.7%	0.413%
2/14/2023	Engineers Gate Manager LP	4,135	$0.25M	0.0%	N/A	0.009%
2/13/2023	Platinum Investment Management Ltd.	41,508	$2.50M	0.1%	-15.1%	0.086%
2/13/2023	Charles Schwab Investment Management Inc.	300,850	$18.13M	0.0%	+5.3%	0.622%
2/13/2023	Deutsche Bank AG	21,898	$1.32M	0.0%	+34.5%	0.045%
2/13/2023	Wells Fargo & Company MN	10,665	$0.64M	0.0%	-14.7%	0.022%
2/13/2023	Barclays PLC	79,339	$4.78M	0.0%	+16.6%	0.164%
2/13/2023	Renaissance Technologies LLC	474,900	$28.61M	0.0%	-25.4%	0.982%
2/13/2023	The Manufacturers Life Insurance Company	55,062	$3.29M	0.0%	+3.8%	0.114%
2/13/2023	Credit Suisse AG	38,887	$2.34M	0.0%	+24.3%	0.080%
2/13/2023	Geode Capital Management LLC	715,601	$43.11M	0.0%	+12.6%	1.479%
2/13/2023	Finepoint Capital LP	322,900	$19.46M	6.3%	+5.7%	0.667%
2/13/2023	American Century Companies Inc.	4,167	$0.25M	0.0%	N/A	0.009%
2/13/2023	Advisory Research Inc.	7,120	$0.43M	0.0%	N/A	0.015%
2/13/2023	Capital Fund Management S.A.	29,772	$1.79M	0.0%	N/A	0.062%
2/13/2023	JPMorgan Chase & Co.	404,551	$24.37M	0.0%	-24.0%	0.836%
2/13/2023	Edgewood Management LLC	24,060	$1.45M	0.0%	-3.8%	0.050%
2/13/2023	Teacher Retirement System of Texas	9,738	$0.59M	0.0%	-8.8%	0.020%
2/10/2023	Bank of America Corp DE	121,671	$7.33M	0.0%	+46.4%	0.251%
2/10/2023	American International Group Inc.	17,344	$1.05M	0.0%	+3.0%	0.036%
2/10/2023	Amalgamated Bank	6,126	$0.37M	0.0%	+7.1%	0.013%
2/10/2023	AXQ Capital LP	5,125	$0.31M	0.2%	N/A	0.011%
2/10/2023	Connor Clark & Lunn Investment Management Ltd.	60,432	$3.64M	0.0%	+119.3%	0.125%
2/10/2023	Sectoral Asset Management Inc.	115,200	$6.94M	1.3%	N/A	0.238%
2/10/2023	Victory Capital Management Inc.	9,418	$0.57M	0.0%	-35.4%	0.018%
2/10/2023	Franklin Resources Inc.	4,200	$0.25M	0.0%	-33.9%	0.009%
2/9/2023	First Trust Advisors LP	62,396	$3.76M	0.0%	+60.8%	0.129%
2/9/2023	Jennison Associates LLC	49,241	$2.97M	0.0%	N/A	0.102%
2/9/2023	Victory Capital Management Inc.	6,504	$0.37M	0.0%	-55.4%	0.013%
2/9/2023	Dimensional Fund Advisors LP	1,320,501	$79.56M	0.0%	-11.0%	2.730%
2/9/2023	Principal Financial Group Inc.	56,007	$3.37M	0.0%	+194.5%	0.116%
2/9/2023	Citigroup Inc.	63,400	$3.82M	0.0%	-35.4%	0.131%
2/8/2023	Raymond James & Associates	5,005	$0.30M	0.0%	N/A	0.010%
2/8/2023	UBS Group AG	91,069	$5.49M	0.0%	+1,381.0%	0.188%
2/8/2023	Swiss National Bank	79,300	$4.78M	0.0%	+2.7%	0.164%
2/8/2023	Arizona State Retirement System	9,268	$0.56M	0.0%	+4.1%	0.019%
2/8/2023	Thornburg Investment Management Inc.	24,274	$1.46M	0.0%	N/A	0.050%
2/7/2023	State Board of Administration of Florida Retirement System	11,286	$0.68M	0.0%	-29.8%	0.023%
2/7/2023	Handelsbanken Fonder AB	52,000	$3.13M	0.0%	-39.3%	0.107%
2/7/2023	TD Asset Management Inc	81,513	$4.91M	0.0%	+18.9%	0.168%
2/6/2023	Los Angeles Capital Management LLC	5,576	$0.34M	0.0%	-8.7%	0.012%
2/3/2023	Frazier Life Sciences Management L.P.	127,900	$7.71M	0.5%	N/A	0.264%
2/3/2023	Birchview Capital LP	127,195	$7.66M	5.4%	+6.9%	0.263%
2/2/2023	SG Americas Securities LLC	78,772	$4.75M	0.1%	-41.9%	0.163%
2/2/2023	ProShare Advisors LLC	8,719	$0.53M	0.0%	+11.0%	0.018%
2/2/2023	Monarch Partners Asset Management LLC	35,645	$2.15M	0.6%	+6.8%	0.074%
2/2/2023	HighMark Wealth Management LLC	7,527	$0.45M	0.3%	+540.6%	0.016%
2/1/2023	State of New Jersey Common Pension Fund D	37,600	$2.27M	0.0%	N/A	0.078%
2/1/2023	Zurcher Kantonalbank Zurich Cantonalbank	5,386	$0.33M	0.0%	+28.0%	0.011%
2/1/2023	Pinnacle Associates Ltd.	137,571	$8.29M	0.2%	-1.8%	0.284%
1/30/2023	New York State Common Retirement Fund	35,780	$2.16M	0.0%	-1.7%	0.074%
1/26/2023	Strs Ohio	12,500	$0.75M	0.0%	-36.2%	0.026%
1/25/2023	Pinnacle Associates Ltd.	137,371	$8.41M	0.2%	-1.9%	0.284%
1/24/2023	Moody Aldrich Partners LLC	39,237	$2.36M	0.5%	N/A	0.081%
1/23/2023	Allspring Global Investments Holdings LLC	6,984	$0.42M	0.0%	-45.3%	0.014%
12/8/2022	Bank of New York Mellon Corp	140,192	$8.50M	0.0%	+17.4%	0.290%
11/21/2022	California State Teachers Retirement System	42,203	$2.56M	0.0%	-2.2%	0.087%
11/16/2022	Balyasny Asset Management LLC	6,515	$0.40M	0.0%	-81.0%	0.013%
11/16/2022	BNP Paribas Arbitrage SNC	38,407	$2.33M	0.0%	+362.8%	0.079%
11/15/2022	State Street Corp	1,881,794	$114.09M	0.0%	-16.2%	3.890%
11/15/2022	Algert Global LLC	8,670	$0.53M	0.0%	N/A	0.018%
11/15/2022	Two Sigma Advisers LP	335,000	$20.31M	0.1%	-25.2%	0.692%
11/15/2022	Two Sigma Investments LP	135,685	$8.23M	0.0%	-41.1%	0.280%
11/15/2022	Vanguard Group Inc.	807,960	$48.99M	0.0%	-2.5%	1.670%
11/15/2022	Perceptive Advisors LLC	230,000	$13.95M	0.4%	N/A	0.475%
11/15/2022	Platinum Investment Management Ltd.	48,914	$2.97M	0.1%	-19.2%	0.101%
11/15/2022	Price T Rowe Associates Inc. MD	2,981,941	$180.80M	0.0%	-50.0%	6.164%
11/15/2022	Putnam Investments LLC	14,756	$0.89M	0.0%	+9.4%	0.031%
11/15/2022	Palo Alto Investors LP	1,649,777	$100.03M	7.9%	-1.9%	3.410%
11/15/2022	Quantamental Technologies LLC	5,106	$0.31M	0.1%	N/A	0.011%
11/15/2022	Marshall Wace LLP	107,803	$6.54M	0.0%	-39.6%	0.223%

Data available starting January 2016

Prothena Corp. Plc is a clinical-stage neuroscience company. It focuses on the discovery and development of novel therapies to change the course of devastating diseases. The firm's clinical pipeline includes both wholly-owned and partnered programs being developed for the potential treatment of diseases including AL amyloidosis, ATTR amyloidosis, Alzheimer's disease, Parkinson's disease and other neurodegenerative diseases. The company was founded in December 1969 and is headquartered in Dublin, Ireland.

Today's Range

Now: $48.23

$45.06

$48.58

50 Day Range

MA: $52.53

$46.97

$58.27

52 Week Range

Now: $48.23

$21.06

$66.47

Volume

62,942 shs

Average Volume

490,213 shs

Market Capitalization

$2.53 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.41

Who are the company insiders with the largest holdings of Prothena?: Prothena's top insider shareholders include:
Ecor1 Capital, Llc (Major Shareholder)
Christopher S Henney (Director)
Wagner M Zago (Insider)
Gene G Kinney (CEO)
Christopher S Henney (Director)
Dennis J Selkoe (Director)
Tran Nguyen (CFO)
Richard T Collier (Director)
Shane Cooke (Director)
Hideki Garren (Insider)
Lars Ekman (Insider)
Michael J Malecek (Insider)
Carol D Karp (Insider)
Dennis J Selkoe (Director)
Karin L Walker (CAO)
Michael J Malecek (Insider)
Learn More about top insider investors at Prothena.
Who are the major institutional investors of Prothena?: Prothena's top institutional shareholders include:
Price T Rowe Associates Inc. MD — 6.63%
Avidity Partners Management LP — 6.10%
First Light Asset Management LLC — 3.17%
Dimensional Fund Advisors LP — 2.73%
T. Rowe Price Investment Management Inc. — 1.92%
Geode Capital Management LLC — 1.48%
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:
Dimensional Fund Advisors LP
Renaissance Technologies LLC
JPMorgan Chase & Co.
Simplex Trading LLC
SG Americas Securities LLC
Citigroup Inc.
Handelsbanken Fonder AB
Silverarc Capital Management LLC
Within the previous year, company insiders that have sold Prothena company stock include:
Ecor1 Capital, Llc (Major Shareholder)
Christopher S Henney (Director)
Wagner M Zago (Insider)
Gene G Kinney (CEO)
Christopher S Henney (Director)
Dennis J Selkoe (Director)
Tran Nguyen (CFO)
Richard T Collier (Director)
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:
Avidity Partners Management LP
Price T Rowe Associates Inc. MD
Point72 Asset Management L.P.
Frazier Life Sciences Management L.P.
Millennium Management LLC
Sectoral Asset Management Inc.
UBS Group AG
T. Rowe Price Investment Management Inc.

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PRTA Insider Trading

Prothena Insider Trading History Chart

Prothena Share Price & Price History

Prothena Insider Trading History

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

Institutional Buying and Selling by Quarter

Prothena Institutional Trading History

Today's Range

50 Day Range

52 Week Range

Volume

Average Volume

Market Capitalization

P/E Ratio

Dividend Yield

Beta

Who are the company insiders with the largest holdings of Prothena?

Who are the major institutional investors of Prothena?

Which major investors are selling Prothena stock?

Which major investors are buying Prothena stock?