Prothena (PRTA) insider trading activity: Get Latest News Today

PRTA Stock Outstanding Shares

Making an investment decision in the stock market involves a certain amount of risk, so it's important to thoroughly review a company's stock before making any decisions. Stock float, number of short positions and outstanding shares are among the many factors an investor should take into account.

ShortableYes

OptionableYes

Short Percent Of Outstanding Shares15.58

Short Percent Of Float29.3

Shares Outstanding53.83M

Shares Float32.02M

Shares Short8.38M

Short Ratio18.26

29.3%

Short % of Float

15.58%

Short % of Shares Outstanding

Market Insider PRTA

Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.

Major Holders Summary

19.02% Percentage of Shares held by All Insiders

102.7% Percentage of Shares held by All Institutions

126.82% Percentage of Float held by Institutions

251

Number of Institutions Holding Shares

Institutional Ownership

About 102.7% of PRTA shares are held by financial institutions. CREDIT SUISSE AG/ is the top corporate investor, holding 60.2K shares valued at $1.49M. A 0.11% stake in Prothena Corporation plc is owned by the company. EDGEWOOD MANAGEMENT LLC owns 24.06K shares valued at $595.97K, which translates its holding of 0.05% of the stake in the company.

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
Mar 31, 2024	CREDIT SUISSE AG/	0.11%	60.2K	1.49M	898	+1.51%
Mar 31, 2024	EDGEWOOD MANAGEMENT LLC	0.05%	24.06K	595.97K	0	0
Mar 31, 2024	METLIFE INVESTMENT MANAGEMENT, LLC	0.04%	21.85K	541.27K	0	0
Mar 31, 2024	BLACKROCK INC.	6.99%	3.72M	92.11M	-51.84K	-1.37%
Mar 31, 2024	VANGUARD GROUP INC	2.11%	1.13M	27.87M	54.73K	+5.11%
Mar 31, 2024	ARTAL GROUP S.A.	1.88%	1M	24.8M	500K	+99.73%
Mar 31, 2024	GEODE CAPITAL MANAGEMENT, LLC	1.74%	924.58K	22.91M	19.46K	+2.15%
Mar 31, 2024	DIMENSIONAL FUND ADVISORS LP	1.62%	862.83K	21.37M	-4.8K	-0.55%
Mar 31, 2024	FINEPOINT CAPITAL LP	0.76%	402.4K	9.97M	53.1K	+15.20%
Mar 31, 2024	NORTHERN TRUST CORP	0.75%	397.26K	9.84M	-6.85K	-1.69%
Mar 31, 2024	UBS ASSET MANAGEMENT AMERICAS INC	0.71%	375.17K	9.29M	83.3K	+28.54%
Mar 31, 2024	GRANAHAN INVESTMENT MANAGEMENT, LLC	0.63%	333.92K	8.27M	-83.24K	-19.95%
Mar 31, 2024	MILLENNIUM MANAGEMENT LLC	0.61%	322.24K	7.98M	284.59K	+755.75%
Mar 31, 2024	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.6%	318.91K	7.9M	5.68K	+1.81%
Mar 31, 2024	GOLDMAN SACHS GROUP INC	0.58%	308.89K	7.65M	-24.9K	-7.46%
Mar 31, 2024	JPMORGAN CHASE & CO	0.56%	298.09K	7.38M	-60.39K	-16.85%
Mar 31, 2024	CITIGROUP INC	0.49%	259.87K	6.44M	172.29K	+196.72%
Mar 31, 2024	NUVEEN ASSET MANAGEMENT, LLC	0.46%	243.02K	6.02M	-57.8K	-19.21%
Mar 31, 2024	BANK OF AMERICA CORP /DE/	0.45%	240.34K	5.95M	-47.01K	-16.36%
Mar 31, 2024	CITADEL ADVISORS LLC	0.44%	234.93K	5.82M	96.34K	+69.52%
Mar 31, 2024	UBS GROUP AG	0.37%	198.68K	4.92M	66.18K	+49.95%
Mar 31, 2024	FMR LLC	15.05%	8.01M	198.32M	-43.39K	-0.54%
Mar 31, 2024	STATE STREET CORP	6.53%	3.47M	86.05M	715.43K	+25.93%
Mar 31, 2024	RHUMBLINE ADVISERS	0.12%	63.5K	1.57M	1.58K	+2.55%
Mar 31, 2024	PRICE T ROWE ASSOCIATES INC /MD/	7.9%	4.2M	104.08M	-35.58K	-0.84%
Mar 31, 2024	WELLINGTON MANAGEMENT GROUP LLP	7.05%	3.75M	92.94M	1.16M	+44.64%
Mar 31, 2024	PALO ALTO INVESTORS LP	3.13%	1.66M	41.2M	3.39K	+0.20%
Mar 31, 2024	JANUS HENDERSON GROUP PLC	2.46%	1.31M	32.44M	-726.39K	-35.68%
Mar 31, 2024	ARMISTICE CAPITAL, LLC	2.06%	1.1M	27.15M	818K	+294.24%
Mar 31, 2024	BOXER CAPITAL, LLC	1.3%	690K	17.09M	25K	+3.76%
Mar 31, 2024	MORGAN STANLEY	1.23%	652.47K	16.16M	170.21K	+35.29%
Mar 31, 2024	ROCK SPRINGS CAPITAL MANAGEMENT LP	1.17%	625.05K	15.48M	0	0
Mar 31, 2024	FIRST LIGHT ASSET MANAGEMENT, LLC	0.84%	444.95K	11.02M	-643.85K	-59.13%
Mar 31, 2024	RENAISSANCE TECHNOLOGIES LLC	0.73%	389.7K	9.65M	53.9K	+16.05%
Mar 31, 2024	QUBE RESEARCH & TECHNOLOGIES LTD	0.37%	195.45K	4.84M	-8.24K	-4.04%
Mar 31, 2024	MARINER, LLC	0.33%	176.97K	4.38M	-1.46K	-0.82%
Mar 31, 2024	PROSIGHT MANAGEMENT, LP	0.32%	170.47K	4.22M	-59.07K	-25.73%
Mar 31, 2024	BIRCHVIEW CAPITAL, LP	0.32%	169.57K	4.2M	0	0
Mar 31, 2024	SYSTEMATIC FINANCIAL MANAGEMENT LP	0.29%	153.99K	3.81M	4.23K	+2.83%
Mar 31, 2024	BANK OF NEW YORK MELLON CORP	0.27%	145.85K	3.61M	-296.46K	-67.03%
Mar 31, 2024	CUBIST SYSTEMATIC STRATEGIES, LLC	0.25%	135.32K	3.35M	125.44K	+1,269.78%
Mar 31, 2024	CONNOR, CLARK & LUNN INVESTMENT MANAGEMENT LTD.	0.25%	131.91K	3.27M	-24.04K	-15.41%
Mar 31, 2024	PINNACLE ASSOCIATES LTD	0.24%	125.26K	3.1M	-483	-0.38%
Mar 31, 2024	AXA S.A.	0.23%	120.65K	2.99M	33	+0.03%
Mar 31, 2024	TD ASSET MANAGEMENT INC	0.22%	116.34K	2.88M	-30.2K	-20.61%
Mar 31, 2024	DCF ADVISERS, LLC	0.2%	107K	2.65M	23K	+27.38%
Mar 31, 2024	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.16%	84.9K	2.1M	-456.6K	-84.32%
Mar 31, 2024	MANUFACTURERS LIFE INSURANCE COMPANY, THE	0.16%	82.58K	2.05M	-3.04K	-3.55%
Mar 31, 2024	SWISS NATIONAL BANK	0.15%	79.2K	1.96M	0	0
Mar 31, 2024	ECOR1 CAPITAL, LLC	21.77%	11.58M	286.94M	0	0
Mar 31, 2024	RAFFERTY ASSET MANAGEMENT, LLC	0.57%	303.46K	7.52M	96.04K	+46.30%
Mar 31, 2024	PIER CAPITAL, LLC	0.11%	57.02K	1.41M	191	+0.34%
Mar 31, 2024	WELLS FARGO & COMPANY/MN	0.1%	51.05K	1.26M	5.08K	+11.05%
Mar 31, 2024	THRIVENT FINANCIAL FOR LUTHERANS	0.09%	49.54K	1.23M	49.54K	+100.00%
Mar 31, 2024	ALGERT GLOBAL LLC	0.09%	48.35K	1.2M	-908	-1.84%
Mar 31, 2024	PROFUND ADVISORS LLC	0.09%	46.88K	1.16B	13.12K	+38.88%
Mar 31, 2024	ALLIANCEBERNSTEIN L.P.	0.09%	46.75K	1.16M	0	0
Mar 31, 2024	GUGGENHEIM CAPITAL LLC	0.08%	44.4K	1.1M	20.94K	+89.25%
Mar 31, 2024	PLATINUM INVESTMENT MANAGEMENT LTD	0.08%	41.51K	1.03M	0	0
Mar 31, 2024	SEVEN EIGHT CAPITAL, LP	0.08%	41.12K	1.02M	-15.83K	-27.79%
Mar 31, 2024	INVESCO LTD.	0.08%	40.5K	1M	13.89K	+52.18%
Mar 31, 2024	LEGAL & GENERAL GROUP PLC	0.07%	38.88K	962.94M	478	+1.24%
Mar 31, 2024	ALPS ADVISORS INC	0.07%	37.89K	938.51K	1.36K	+3.72%
Mar 31, 2024	PRIMECAP MANAGEMENT CO/CA/	0.07%	36.5K	904.11K	36.5K	+100.00%
Mar 31, 2024	STATE OF WISCONSIN INVESTMENT BOARD	0.06%	33.16K	821.35K	402	+1.23%
Mar 31, 2024	NEW YORK STATE COMMON RETIREMENT FUND	0.06%	32.35K	801K	-1.3K	-3.86%
Mar 31, 2024	BNP PARIBAS ARBITRAGE, SNC	0.06%	32.25K	798.91K	-60.75K	-65.32%
Mar 31, 2024	JUMP FINANCIAL, LLC	0.05%	27.95K	692.35K	21.49K	+332.88%
Mar 31, 2024	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.05%	27.91K	1.09M	161	+0.58%
Mar 31, 2024	BANK OF MONTREAL /CAN/	0.05%	24.88K	622.25K	24.88K	+100.00%
Dec 31, 2023	FMR LLC	15.03%	8.05M	292.53M	19.51K	+0.24%
Dec 31, 2023	PRICE T ROWE ASSOCIATES INC /MD/	7.91%	4.24M	153.99M	417.34K	+10.93%
Dec 31, 2023	BLACKROCK INC.	7.04%	3.77M	137.03M	229.41K	+6.48%
Dec 31, 2023	STATE STREET CORP	5.15%	2.76M	100.25M	648.33K	+30.72%
Dec 31, 2023	WELLINGTON MANAGEMENT GROUP LLP	4.84%	2.59M	94.27M	2.59M	+100.00%
Dec 31, 2023	JANUS HENDERSON GROUP PLC	3.8%	2.04M	73.98M	209.38K	+11.46%
Dec 31, 2023	PALO ALTO INVESTORS LP	3.1%	1.66M	60.33M	2.6K	+0.16%
Dec 31, 2023	FIRST LIGHT ASSET MANAGEMENT, LLC	2.03%	1.09M	39.57M	-405.24K	-27.12%
Dec 31, 2023	VANGUARD GROUP INC	2%	1.07M	38.9M	39.78K	+3.86%
Dec 31, 2023	GEODE CAPITAL MANAGEMENT, LLC	1.69%	905.13K	32.9M	46.07K	+5.36%
Dec 31, 2023	DIMENSIONAL FUND ADVISORS LP	1.62%	867.64K	31.53M	-235.23K	-21.33%
Dec 31, 2023	BOXER CAPITAL, LLC	1.24%	665K	24.17M	40K	+6.40%
Dec 31, 2023	ROCK SPRINGS CAPITAL MANAGEMENT LP	1.17%	625.05K	22.71M	10.75K	+1.75%
Dec 31, 2023	ARTAL GROUP S.A.	0.94%	501.36K	18.22M	501.36K	+100.00%
Dec 31, 2023	DEEP TRACK CAPITAL, LP	0.47%	250K	9.09M	0	0
Dec 31, 2023	MORGAN STANLEY	0.9%	482.26K	17.53M	213.4K	+79.37%
Dec 31, 2023	EVENTIDE ASSET MANAGEMENT, LLC	0.83%	445.16K	16.18M	0	0
Dec 31, 2023	BANK OF NEW YORK MELLON CORP	0.83%	442.31K	16.07M	-57.07K	-11.43%
Dec 31, 2023	IKARIAN CAPITAL, LLC	0.78%	418.4K	15.2M	418.4K	+100.00%
Dec 31, 2023	GRANAHAN INVESTMENT MANAGEMENT, LLC	0.78%	417.16K	15.16M	69.09K	+19.85%
Dec 31, 2023	NORTHERN TRUST CORP	0.75%	404.11K	14.69M	-5.74K	-1.40%
Dec 31, 2023	MAPLE ROCK CAPITAL PARTNERS INC.	0.7%	373.58K	13.58M	139K	+59.25%
Dec 31, 2023	JPMORGAN CHASE & CO	0.67%	358.48K	13.03M	-43.55K	-10.83%
Dec 31, 2023	FINEPOINT CAPITAL LP	0.65%	349.3K	12.69M	0	0
Dec 31, 2023	RENAISSANCE TECHNOLOGIES LLC	0.63%	335.8K	12.2M	75.2K	+28.86%
Dec 31, 2023	GOLDMAN SACHS GROUP INC	0.62%	333.79K	12.13M	83.46K	+33.34%
Dec 31, 2023	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.58%	313.23K	11.38M	4.69K	+1.52%
Dec 31, 2023	NUVEEN ASSET MANAGEMENT, LLC	0.56%	300.82K	10.93M	-136.45K	-31.21%
Dec 31, 2023	UBS ASSET MANAGEMENT AMERICAS INC	0.54%	291.87K	10.61M	25.82K	+9.71%
Dec 31, 2023	BANK OF AMERICA CORP /DE/	0.54%	287.36K	10.44M	177.93K	+162.61%
Dec 31, 2023	ARMISTICE CAPITAL, LLC	0.52%	278K	10.1M	278K	+100.00%
Dec 31, 2023	PROSIGHT MANAGEMENT, LP	0.43%	229.54K	8.34M	103.34K	+81.88%
Dec 31, 2023	RAFFERTY ASSET MANAGEMENT, LLC	0.39%	207.42K	7.54M	50.58K	+32.25%
Dec 31, 2023	QUBE RESEARCH & TECHNOLOGIES LTD	0.38%	203.68K	7.4M	119.03K	+140.61%
Dec 31, 2023	PFM HEALTH SCIENCES, LP	0.35%	189.74K	6.9M	-646.83K	-77.32%
Dec 31, 2023	JANE STREET GROUP, LLC	0.35%	185.2K	6.73M	178.94K	+2,860.28%
Dec 31, 2023	MARINER, LLC	0.33%	178.42K	6.48M	10.49K	+6.25%
Dec 31, 2023	BIRCHVIEW CAPITAL, LP	0.32%	169.57K	6.16M	0	0
Dec 31, 2023	AMUNDI	0.31%	166.63K	6.6M	-9.94K	-5.63%
Dec 31, 2023	BOOTHBAY FUND MANAGEMENT, LLC	0.3%	158.8K	5.77M	158.8K	+100.00%
Dec 31, 2023	CONNOR, CLARK & LUNN INVESTMENT MANAGEMENT LTD.	0.29%	155.94K	5.67M	28.17K	+22.04%
Dec 31, 2023	SYSTEMATIC FINANCIAL MANAGEMENT LP	0.28%	149.76K	5.44M	149.76K	+100.00%
Dec 31, 2023	TWO SIGMA ADVISERS, LP	0.27%	146.8K	5.33M	-57K	-27.97%
Dec 31, 2023	TD ASSET MANAGEMENT INC	0.27%	146.54K	5.33M	-26.14K	-15.14%
Dec 31, 2023	BARCLAYS PLC	0.27%	142.61K	5.18M	56.57K	+65.75%
Dec 31, 2023	CITADEL ADVISORS LLC	0.26%	138.59K	5.04M	-10.35K	-6.95%
Dec 31, 2023	CAPTION MANAGEMENT, LLC	0.26%	138.1K	5.02M	138.1K	+100.00%
Dec 31, 2023	ECOR1 CAPITAL, LLC	21.63%	11.58M	420.97M	0	0

PRTA Insiders

Among the PRTA insiders holding of 19.02% of the stake in company, KINNEY GENE G., President and CEO, holds the largest shares of 12.79K. NGUYEN TRAN, Chief Strategy Officer and CFO, is the second largest PRTA insider with ownership of 3.2K shares. SELKOE DENNIS J., director, stands third with possession of 2.85K shares of that stake.

Insiders	Designation	Shares Held
KINNEY GENE G.	President and CEO	12.79K
NGUYEN TRAN	Chief Strategy Officer and CFO	3.2K
SELKOE DENNIS J.	director	2.85K
GARREN HIDEKI	Chief Medical Officer	0
MALECEK MICHAEL J	Chief Legal Officer	0
ZAGO WAGNER M.	Chief Scientific Officer	0
KARP CAROL D.	Chief Regulatory Officer	0
WALKER KARIN L	Chief Accounting Officer	0
SMITH BRANDON S.	Chief Operating Officer	0

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
Jan 24, 2024	WALKER KARIN L	SALE	34.00	5K	170K	0
Dec 20, 2023	WALKER KARIN L	SALE	37.45	3.32K	124.41K	0
Nov 30, 2023	WALKER KARIN L	SALE	34.00	5K	170K	0
Oct 25, 2023	WALKER KARIN L	SALE	42.28	294	12.43K	0
Oct 11, 2023	SMITH BRANDON S.	SALE	47.74	444	21.2K	0
Oct 04, 2023	KARP CAROL D.	SALE	47.29	663	31.36K	0
Sep 27, 2023	MALECEK MICHAEL J	SALE	48.31	404	19.52K	0
Sep 19, 2023	WALKER KARIN L	SALE	52.36	5K	261.81K	0
Sep 13, 2023	GARREN HIDEKI	SALE	55.48	2K	110.95K	0
Sep 13, 2023	SMITH BRANDON S.	SALE	55.96	114	6.38K	0
Sep 06, 2023	KARP CAROL D.	SALE	55.27	6	331.62	0
Aug 30, 2023	MALECEK MICHAEL J	SALE	56.21	14	786.94	0
Aug 18, 2023	WALKER KARIN L	SALE	57.18	5K	285.92K	0
Aug 16, 2023	SMITH BRANDON S.	SALE	59.91	401	24.03K	0
Aug 16, 2023	GARREN HIDEKI	SALE	59.74	374	22.34K	0
Aug 02, 2023	ZAGO WAGNER M.	SALE	68.07	229	15.59K	0
Aug 02, 2023	KARP CAROL D.	SALE	67.95	328	22.29K	0
Jul 26, 2023	MALECEK MICHAEL J	SALE	63.40	620	39.31K	0
Jul 19, 2023	WALKER KARIN L	SALE	70.08	1.03K	72.46K	0
Jul 12, 2023	SMITH BRANDON S.	SALE	67.95	800	54.36K	0
Jul 12, 2023	GARREN HIDEKI	SALE	68.20	92	6.27K	0
Jul 05, 2023	ZAGO WAGNER M.	SALE	68.69	1.01K	69.31K	0
Jul 05, 2023	KARP CAROL D.	SALE	68.69	1.03K	71.03K	0
Jul 03, 2023	SELKOE DENNIS J.	SALE	67.43	5K	337.15K	2.85K
Jun 28, 2023	MALECEK MICHAEL J	SALE	70.84	710	50.3K	0
Jun 20, 2023	WALKER KARIN L	SALE	69.99	529	37.03K	0
Jun 16, 2023	GARREN HIDEKI	SALE	74.00	7.33K	542.49K	0
Jun 14, 2023	SMITH BRANDON S.	SALE	75.56	1.36K	102.91K	0
Jun 14, 2023	GARREN HIDEKI	SALE	75.49	655	49.44K	0
Jun 07, 2023	ZAGO WAGNER M.	SALE	73.14	294	21.5K	0
Jun 07, 2023	KARP CAROL D.	SALE	72.93	361	26.33K	0
May 31, 2023	MALECEK MICHAEL J	SALE	65.98	711	46.91K	0
May 19, 2023	WALKER KARIN L	SALE	74.47	2.18K	162.13K	0
May 17, 2023	KINNEY GENE G.	SALE	74.49	14.93K	1.11M	12.79K
May 17, 2023	NGUYEN TRAN	SALE	76.04	100	7.6K	3.2K
May 03, 2023	SELKOE DENNIS J.	SALE	57.00	15K	855K	2.85K
Apr 26, 2023	MALECEK MICHAEL J	SALE	54.25	320	17.36K	0
Apr 19, 2023	WALKER KARIN L	SALE	53.25	2.08K	110.92K	0
Mar 29, 2023	MALECEK MICHAEL J	SALE	49.28	2.27K	111.67K	0
Mar 15, 2023	MALECEK MICHAEL J	SALE	48.67	8.56K	416.8K	0
Mar 15, 2023	GARREN HIDEKI	SALE	48.66	6K	291.97K	0
Mar 15, 2023	NGUYEN TRAN	SALE	48.68	5.2K	253.03K	3.2K
Mar 15, 2023	WALKER KARIN L	SALE	48.66	10.57K	514.33K	0
Feb 15, 2023	NGUYEN TRAN	SALE	53.87	664	35.77K	3.2K

Frequently Asked Questions

PRTA Stock Outstanding Shares

ShortableYes

OptionableYes

Short Percent Of Outstanding Shares15.58

Short Percent Of Float29.3

Shares Outstanding53.83M

Shares Float32.02M

Shares Short8.38M

Short Ratio18.26

29.3%

Short % of Float

15.58%

Short % of Shares Outstanding

Market Insider PRTA

Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.

Major Holders Summary

19.02% Percentage of Shares held by All Insiders

102.7% Percentage of Shares held by All Institutions

126.82% Percentage of Float held by Institutions

251

Number of Institutions Holding Shares

Institutional Ownership

Date	Holder	% Stake	Shares Held	Total Value ($)	Shares	% Change in Portfolio
Mar 31, 2024	CREDIT SUISSE AG/	0.11%	60.2K	1.49M	898	+1.51%
Mar 31, 2024	EDGEWOOD MANAGEMENT LLC	0.05%	24.06K	595.97K	0	0
Mar 31, 2024	METLIFE INVESTMENT MANAGEMENT, LLC	0.04%	21.85K	541.27K	0	0
Mar 31, 2024	BLACKROCK INC.	6.99%	3.72M	92.11M	-51.84K	-1.37%
Mar 31, 2024	VANGUARD GROUP INC	2.11%	1.13M	27.87M	54.73K	+5.11%
Mar 31, 2024	ARTAL GROUP S.A.	1.88%	1M	24.8M	500K	+99.73%
Mar 31, 2024	GEODE CAPITAL MANAGEMENT, LLC	1.74%	924.58K	22.91M	19.46K	+2.15%
Mar 31, 2024	DIMENSIONAL FUND ADVISORS LP	1.62%	862.83K	21.37M	-4.8K	-0.55%
Mar 31, 2024	FINEPOINT CAPITAL LP	0.76%	402.4K	9.97M	53.1K	+15.20%
Mar 31, 2024	NORTHERN TRUST CORP	0.75%	397.26K	9.84M	-6.85K	-1.69%
Mar 31, 2024	UBS ASSET MANAGEMENT AMERICAS INC	0.71%	375.17K	9.29M	83.3K	+28.54%
Mar 31, 2024	GRANAHAN INVESTMENT MANAGEMENT, LLC	0.63%	333.92K	8.27M	-83.24K	-19.95%
Mar 31, 2024	MILLENNIUM MANAGEMENT LLC	0.61%	322.24K	7.98M	284.59K	+755.75%
Mar 31, 2024	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.6%	318.91K	7.9M	5.68K	+1.81%
Mar 31, 2024	GOLDMAN SACHS GROUP INC	0.58%	308.89K	7.65M	-24.9K	-7.46%
Mar 31, 2024	JPMORGAN CHASE & CO	0.56%	298.09K	7.38M	-60.39K	-16.85%
Mar 31, 2024	CITIGROUP INC	0.49%	259.87K	6.44M	172.29K	+196.72%
Mar 31, 2024	NUVEEN ASSET MANAGEMENT, LLC	0.46%	243.02K	6.02M	-57.8K	-19.21%
Mar 31, 2024	BANK OF AMERICA CORP /DE/	0.45%	240.34K	5.95M	-47.01K	-16.36%
Mar 31, 2024	CITADEL ADVISORS LLC	0.44%	234.93K	5.82M	96.34K	+69.52%
Mar 31, 2024	UBS GROUP AG	0.37%	198.68K	4.92M	66.18K	+49.95%
Mar 31, 2024	FMR LLC	15.05%	8.01M	198.32M	-43.39K	-0.54%
Mar 31, 2024	STATE STREET CORP	6.53%	3.47M	86.05M	715.43K	+25.93%
Mar 31, 2024	RHUMBLINE ADVISERS	0.12%	63.5K	1.57M	1.58K	+2.55%
Mar 31, 2024	PRICE T ROWE ASSOCIATES INC /MD/	7.9%	4.2M	104.08M	-35.58K	-0.84%
Mar 31, 2024	WELLINGTON MANAGEMENT GROUP LLP	7.05%	3.75M	92.94M	1.16M	+44.64%
Mar 31, 2024	PALO ALTO INVESTORS LP	3.13%	1.66M	41.2M	3.39K	+0.20%
Mar 31, 2024	JANUS HENDERSON GROUP PLC	2.46%	1.31M	32.44M	-726.39K	-35.68%
Mar 31, 2024	ARMISTICE CAPITAL, LLC	2.06%	1.1M	27.15M	818K	+294.24%
Mar 31, 2024	BOXER CAPITAL, LLC	1.3%	690K	17.09M	25K	+3.76%
Mar 31, 2024	MORGAN STANLEY	1.23%	652.47K	16.16M	170.21K	+35.29%
Mar 31, 2024	ROCK SPRINGS CAPITAL MANAGEMENT LP	1.17%	625.05K	15.48M	0	0
Mar 31, 2024	FIRST LIGHT ASSET MANAGEMENT, LLC	0.84%	444.95K	11.02M	-643.85K	-59.13%
Mar 31, 2024	RENAISSANCE TECHNOLOGIES LLC	0.73%	389.7K	9.65M	53.9K	+16.05%
Mar 31, 2024	QUBE RESEARCH & TECHNOLOGIES LTD	0.37%	195.45K	4.84M	-8.24K	-4.04%
Mar 31, 2024	MARINER, LLC	0.33%	176.97K	4.38M	-1.46K	-0.82%
Mar 31, 2024	PROSIGHT MANAGEMENT, LP	0.32%	170.47K	4.22M	-59.07K	-25.73%
Mar 31, 2024	BIRCHVIEW CAPITAL, LP	0.32%	169.57K	4.2M	0	0
Mar 31, 2024	SYSTEMATIC FINANCIAL MANAGEMENT LP	0.29%	153.99K	3.81M	4.23K	+2.83%
Mar 31, 2024	BANK OF NEW YORK MELLON CORP	0.27%	145.85K	3.61M	-296.46K	-67.03%
Mar 31, 2024	CUBIST SYSTEMATIC STRATEGIES, LLC	0.25%	135.32K	3.35M	125.44K	+1,269.78%
Mar 31, 2024	CONNOR, CLARK & LUNN INVESTMENT MANAGEMENT LTD.	0.25%	131.91K	3.27M	-24.04K	-15.41%
Mar 31, 2024	PINNACLE ASSOCIATES LTD	0.24%	125.26K	3.1M	-483	-0.38%
Mar 31, 2024	AXA S.A.	0.23%	120.65K	2.99M	33	+0.03%
Mar 31, 2024	TD ASSET MANAGEMENT INC	0.22%	116.34K	2.88M	-30.2K	-20.61%
Mar 31, 2024	DCF ADVISERS, LLC	0.2%	107K	2.65M	23K	+27.38%
Mar 31, 2024	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0.16%	84.9K	2.1M	-456.6K	-84.32%
Mar 31, 2024	MANUFACTURERS LIFE INSURANCE COMPANY, THE	0.16%	82.58K	2.05M	-3.04K	-3.55%
Mar 31, 2024	SWISS NATIONAL BANK	0.15%	79.2K	1.96M	0	0
Mar 31, 2024	ECOR1 CAPITAL, LLC	21.77%	11.58M	286.94M	0	0
Mar 31, 2024	RAFFERTY ASSET MANAGEMENT, LLC	0.57%	303.46K	7.52M	96.04K	+46.30%
Mar 31, 2024	PIER CAPITAL, LLC	0.11%	57.02K	1.41M	191	+0.34%
Mar 31, 2024	WELLS FARGO & COMPANY/MN	0.1%	51.05K	1.26M	5.08K	+11.05%
Mar 31, 2024	THRIVENT FINANCIAL FOR LUTHERANS	0.09%	49.54K	1.23M	49.54K	+100.00%
Mar 31, 2024	ALGERT GLOBAL LLC	0.09%	48.35K	1.2M	-908	-1.84%
Mar 31, 2024	PROFUND ADVISORS LLC	0.09%	46.88K	1.16B	13.12K	+38.88%
Mar 31, 2024	ALLIANCEBERNSTEIN L.P.	0.09%	46.75K	1.16M	0	0
Mar 31, 2024	GUGGENHEIM CAPITAL LLC	0.08%	44.4K	1.1M	20.94K	+89.25%
Mar 31, 2024	PLATINUM INVESTMENT MANAGEMENT LTD	0.08%	41.51K	1.03M	0	0
Mar 31, 2024	SEVEN EIGHT CAPITAL, LP	0.08%	41.12K	1.02M	-15.83K	-27.79%
Mar 31, 2024	INVESCO LTD.	0.08%	40.5K	1M	13.89K	+52.18%
Mar 31, 2024	LEGAL & GENERAL GROUP PLC	0.07%	38.88K	962.94M	478	+1.24%
Mar 31, 2024	ALPS ADVISORS INC	0.07%	37.89K	938.51K	1.36K	+3.72%
Mar 31, 2024	PRIMECAP MANAGEMENT CO/CA/	0.07%	36.5K	904.11K	36.5K	+100.00%
Mar 31, 2024	STATE OF WISCONSIN INVESTMENT BOARD	0.06%	33.16K	821.35K	402	+1.23%
Mar 31, 2024	NEW YORK STATE COMMON RETIREMENT FUND	0.06%	32.35K	801K	-1.3K	-3.86%
Mar 31, 2024	BNP PARIBAS ARBITRAGE, SNC	0.06%	32.25K	798.91K	-60.75K	-65.32%
Mar 31, 2024	JUMP FINANCIAL, LLC	0.05%	27.95K	692.35K	21.49K	+332.88%
Mar 31, 2024	MIRAE ASSET GLOBAL INVESTMENTS CO., LTD.	0.05%	27.91K	1.09M	161	+0.58%
Mar 31, 2024	BANK OF MONTREAL /CAN/	0.05%	24.88K	622.25K	24.88K	+100.00%
Dec 31, 2023	FMR LLC	15.03%	8.05M	292.53M	19.51K	+0.24%
Dec 31, 2023	PRICE T ROWE ASSOCIATES INC /MD/	7.91%	4.24M	153.99M	417.34K	+10.93%
Dec 31, 2023	BLACKROCK INC.	7.04%	3.77M	137.03M	229.41K	+6.48%
Dec 31, 2023	STATE STREET CORP	5.15%	2.76M	100.25M	648.33K	+30.72%
Dec 31, 2023	WELLINGTON MANAGEMENT GROUP LLP	4.84%	2.59M	94.27M	2.59M	+100.00%
Dec 31, 2023	JANUS HENDERSON GROUP PLC	3.8%	2.04M	73.98M	209.38K	+11.46%
Dec 31, 2023	PALO ALTO INVESTORS LP	3.1%	1.66M	60.33M	2.6K	+0.16%
Dec 31, 2023	FIRST LIGHT ASSET MANAGEMENT, LLC	2.03%	1.09M	39.57M	-405.24K	-27.12%
Dec 31, 2023	VANGUARD GROUP INC	2%	1.07M	38.9M	39.78K	+3.86%
Dec 31, 2023	GEODE CAPITAL MANAGEMENT, LLC	1.69%	905.13K	32.9M	46.07K	+5.36%
Dec 31, 2023	DIMENSIONAL FUND ADVISORS LP	1.62%	867.64K	31.53M	-235.23K	-21.33%
Dec 31, 2023	BOXER CAPITAL, LLC	1.24%	665K	24.17M	40K	+6.40%
Dec 31, 2023	ROCK SPRINGS CAPITAL MANAGEMENT LP	1.17%	625.05K	22.71M	10.75K	+1.75%
Dec 31, 2023	ARTAL GROUP S.A.	0.94%	501.36K	18.22M	501.36K	+100.00%
Dec 31, 2023	DEEP TRACK CAPITAL, LP	0.47%	250K	9.09M	0	0
Dec 31, 2023	MORGAN STANLEY	0.9%	482.26K	17.53M	213.4K	+79.37%
Dec 31, 2023	EVENTIDE ASSET MANAGEMENT, LLC	0.83%	445.16K	16.18M	0	0
Dec 31, 2023	BANK OF NEW YORK MELLON CORP	0.83%	442.31K	16.07M	-57.07K	-11.43%
Dec 31, 2023	IKARIAN CAPITAL, LLC	0.78%	418.4K	15.2M	418.4K	+100.00%
Dec 31, 2023	GRANAHAN INVESTMENT MANAGEMENT, LLC	0.78%	417.16K	15.16M	69.09K	+19.85%
Dec 31, 2023	NORTHERN TRUST CORP	0.75%	404.11K	14.69M	-5.74K	-1.40%
Dec 31, 2023	MAPLE ROCK CAPITAL PARTNERS INC.	0.7%	373.58K	13.58M	139K	+59.25%
Dec 31, 2023	JPMORGAN CHASE & CO	0.67%	358.48K	13.03M	-43.55K	-10.83%
Dec 31, 2023	FINEPOINT CAPITAL LP	0.65%	349.3K	12.69M	0	0
Dec 31, 2023	RENAISSANCE TECHNOLOGIES LLC	0.63%	335.8K	12.2M	75.2K	+28.86%
Dec 31, 2023	GOLDMAN SACHS GROUP INC	0.62%	333.79K	12.13M	83.46K	+33.34%
Dec 31, 2023	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.58%	313.23K	11.38M	4.69K	+1.52%
Dec 31, 2023	NUVEEN ASSET MANAGEMENT, LLC	0.56%	300.82K	10.93M	-136.45K	-31.21%
Dec 31, 2023	UBS ASSET MANAGEMENT AMERICAS INC	0.54%	291.87K	10.61M	25.82K	+9.71%
Dec 31, 2023	BANK OF AMERICA CORP /DE/	0.54%	287.36K	10.44M	177.93K	+162.61%
Dec 31, 2023	ARMISTICE CAPITAL, LLC	0.52%	278K	10.1M	278K	+100.00%
Dec 31, 2023	PROSIGHT MANAGEMENT, LP	0.43%	229.54K	8.34M	103.34K	+81.88%
Dec 31, 2023	RAFFERTY ASSET MANAGEMENT, LLC	0.39%	207.42K	7.54M	50.58K	+32.25%
Dec 31, 2023	QUBE RESEARCH & TECHNOLOGIES LTD	0.38%	203.68K	7.4M	119.03K	+140.61%
Dec 31, 2023	PFM HEALTH SCIENCES, LP	0.35%	189.74K	6.9M	-646.83K	-77.32%
Dec 31, 2023	JANE STREET GROUP, LLC	0.35%	185.2K	6.73M	178.94K	+2,860.28%
Dec 31, 2023	MARINER, LLC	0.33%	178.42K	6.48M	10.49K	+6.25%
Dec 31, 2023	BIRCHVIEW CAPITAL, LP	0.32%	169.57K	6.16M	0	0
Dec 31, 2023	AMUNDI	0.31%	166.63K	6.6M	-9.94K	-5.63%
Dec 31, 2023	BOOTHBAY FUND MANAGEMENT, LLC	0.3%	158.8K	5.77M	158.8K	+100.00%
Dec 31, 2023	CONNOR, CLARK & LUNN INVESTMENT MANAGEMENT LTD.	0.29%	155.94K	5.67M	28.17K	+22.04%
Dec 31, 2023	SYSTEMATIC FINANCIAL MANAGEMENT LP	0.28%	149.76K	5.44M	149.76K	+100.00%
Dec 31, 2023	TWO SIGMA ADVISERS, LP	0.27%	146.8K	5.33M	-57K	-27.97%
Dec 31, 2023	TD ASSET MANAGEMENT INC	0.27%	146.54K	5.33M	-26.14K	-15.14%
Dec 31, 2023	BARCLAYS PLC	0.27%	142.61K	5.18M	56.57K	+65.75%
Dec 31, 2023	CITADEL ADVISORS LLC	0.26%	138.59K	5.04M	-10.35K	-6.95%
Dec 31, 2023	CAPTION MANAGEMENT, LLC	0.26%	138.1K	5.02M	138.1K	+100.00%
Dec 31, 2023	ECOR1 CAPITAL, LLC	21.63%	11.58M	420.97M	0	0

PRTA Insiders

Insiders	Designation	Shares Held
KINNEY GENE G.	President and CEO	12.79K
NGUYEN TRAN	Chief Strategy Officer and CFO	3.2K
SELKOE DENNIS J.	director	2.85K
GARREN HIDEKI	Chief Medical Officer	0
MALECEK MICHAEL J	Chief Legal Officer	0
ZAGO WAGNER M.	Chief Scientific Officer	0
KARP CAROL D.	Chief Regulatory Officer	0
WALKER KARIN L	Chief Accounting Officer	0
SMITH BRANDON S.	Chief Operating Officer	0

Buying/Selling by Insiders

Date	Insider	Type	Cost	Shares	Value ($)	Shares Total
Jan 24, 2024	WALKER KARIN L	SALE	34.00	5K	170K	0
Dec 20, 2023	WALKER KARIN L	SALE	37.45	3.32K	124.41K	0
Nov 30, 2023	WALKER KARIN L	SALE	34.00	5K	170K	0
Oct 25, 2023	WALKER KARIN L	SALE	42.28	294	12.43K	0
Oct 11, 2023	SMITH BRANDON S.	SALE	47.74	444	21.2K	0
Oct 04, 2023	KARP CAROL D.	SALE	47.29	663	31.36K	0
Sep 27, 2023	MALECEK MICHAEL J	SALE	48.31	404	19.52K	0
Sep 19, 2023	WALKER KARIN L	SALE	52.36	5K	261.81K	0
Sep 13, 2023	GARREN HIDEKI	SALE	55.48	2K	110.95K	0
Sep 13, 2023	SMITH BRANDON S.	SALE	55.96	114	6.38K	0
Sep 06, 2023	KARP CAROL D.	SALE	55.27	6	331.62	0
Aug 30, 2023	MALECEK MICHAEL J	SALE	56.21	14	786.94	0
Aug 18, 2023	WALKER KARIN L	SALE	57.18	5K	285.92K	0
Aug 16, 2023	SMITH BRANDON S.	SALE	59.91	401	24.03K	0
Aug 16, 2023	GARREN HIDEKI	SALE	59.74	374	22.34K	0
Aug 02, 2023	ZAGO WAGNER M.	SALE	68.07	229	15.59K	0
Aug 02, 2023	KARP CAROL D.	SALE	67.95	328	22.29K	0
Jul 26, 2023	MALECEK MICHAEL J	SALE	63.40	620	39.31K	0
Jul 19, 2023	WALKER KARIN L	SALE	70.08	1.03K	72.46K	0
Jul 12, 2023	SMITH BRANDON S.	SALE	67.95	800	54.36K	0
Jul 12, 2023	GARREN HIDEKI	SALE	68.20	92	6.27K	0
Jul 05, 2023	ZAGO WAGNER M.	SALE	68.69	1.01K	69.31K	0
Jul 05, 2023	KARP CAROL D.	SALE	68.69	1.03K	71.03K	0
Jul 03, 2023	SELKOE DENNIS J.	SALE	67.43	5K	337.15K	2.85K
Jun 28, 2023	MALECEK MICHAEL J	SALE	70.84	710	50.3K	0
Jun 20, 2023	WALKER KARIN L	SALE	69.99	529	37.03K	0
Jun 16, 2023	GARREN HIDEKI	SALE	74.00	7.33K	542.49K	0
Jun 14, 2023	SMITH BRANDON S.	SALE	75.56	1.36K	102.91K	0
Jun 14, 2023	GARREN HIDEKI	SALE	75.49	655	49.44K	0
Jun 07, 2023	ZAGO WAGNER M.	SALE	73.14	294	21.5K	0
Jun 07, 2023	KARP CAROL D.	SALE	72.93	361	26.33K	0
May 31, 2023	MALECEK MICHAEL J	SALE	65.98	711	46.91K	0
May 19, 2023	WALKER KARIN L	SALE	74.47	2.18K	162.13K	0
May 17, 2023	KINNEY GENE G.	SALE	74.49	14.93K	1.11M	12.79K
May 17, 2023	NGUYEN TRAN	SALE	76.04	100	7.6K	3.2K
May 03, 2023	SELKOE DENNIS J.	SALE	57.00	15K	855K	2.85K
Apr 26, 2023	MALECEK MICHAEL J	SALE	54.25	320	17.36K	0
Apr 19, 2023	WALKER KARIN L	SALE	53.25	2.08K	110.92K	0
Mar 29, 2023	MALECEK MICHAEL J	SALE	49.28	2.27K	111.67K	0
Mar 15, 2023	MALECEK MICHAEL J	SALE	48.67	8.56K	416.8K	0
Mar 15, 2023	GARREN HIDEKI	SALE	48.66	6K	291.97K	0
Mar 15, 2023	NGUYEN TRAN	SALE	48.68	5.2K	253.03K	3.2K
Mar 15, 2023	WALKER KARIN L	SALE	48.66	10.57K	514.33K	0
Feb 15, 2023	NGUYEN TRAN	SALE	53.87	664	35.77K	3.2K

PRTA Stock Ownership Breakdown

Prothena Corporation plc

PRTA Stock Outstanding Shares

Market Insider PRTA

Institutional Ownership

PRTA Insiders

Buying/Selling by Insiders

Frequently Asked Questions

PRTA Stock Outstanding Shares

Market Insider PRTA

Institutional Ownership

PRTA Insiders

Buying/Selling by Insiders

Frequently Asked Questions