Prothena (PRTA) Institutional Ownership

$22.11

+1.39 (+6.71%)

(As of 09/13/2024 ET)

Current Institutional Ownership Percentage: 97.08%
Number of Institutional Buyers (last 12 months): 64
Total Institutional Inflows (last 12 months): $120.43M

Number of Institutional Sellers (last 12 months): 37
Total Institutional Outflows (last 12 months): $122.91M

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PRTA Institutional Buying and Selling by Quarter

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Prothena Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
8/16/2024	Systematic Financial Management LP	193,763	$4.00M	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	$373K	0.0%	-61.4%	0.034%
8/13/2024	Ensign Peak Advisors Inc	21,643	$447K	0.0%	+30.4%	0.040%
8/13/2024	Thrivent Financial for Lutherans	47,515	$980K	0.0%	-4.1%	0.088%
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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	$905K	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	$202K	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	$415K	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	$211K	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	$348K	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	$1.00M	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	$280K	0.0%	-5.3%	0.021%
5/8/2024	Focused Wealth Management Inc	10,129	$251K	0.0%	+7,751.9%	0.019%
5/8/2024	ProShare Advisors LLC	11,346	$281K	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	$342K	0.0%	N/A	0.026%
5/7/2024	SG Americas Securities LLC	16,720	$414K	0.0%	-87.7%	0.031%
5/1/2024	BNP Paribas Financial Markets	32,253	$799K	0.0%	-65.4%	0.060%
4/29/2024	Principal Financial Group Inc.	11,737	$291K	0.0%	-62.1%	0.022%
4/29/2024	China Universal Asset Management Co. Ltd.	10,360	$257K	0.0%	+67.0%	0.019%
4/29/2024	HighMark Wealth Management LLC	16,502	$409K	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%
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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	$222K	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	$962K	0.1%	N/A	0.049%
2/8/2024	Thornburg Investment Management Inc.	25,591	$930K	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	$235K	0.0%	-89.8%	0.012%
2/7/2024	Teacher Retirement System of Texas	9,266	$337K	0.0%	-17.5%	0.017%
2/7/2024	E Fund Management Co. Ltd.	11,096	$403K	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	$303K	0.2%	N/A	0.016%
1/30/2024	Zurcher Kantonalbank Zurich Cantonalbank	9,563	$348K	0.0%	+28.1%	0.018%
1/30/2024	Strs Ohio	10,700	$388K	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	$225K	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	$439K	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%
This Crypto Coin Could 10x FASTER Than Bitcoin (Ad) A shocking leak has revealed Japanese electronics giant Sony is now starting its own blockchain. This move is being made in preparation to onboard all of Sony products (including Sony's Playstation, which captured a record 62% share of the global gaming console market in 2024). Enthusiasts and experts are buzzing with anticipation qnd one little-known crypto coin is poised for RAPID growth as we see this all unfold. Click here to review my research and unique strategy to score potential profits from this under-the-
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	$389K	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%

(Data available from 1/1/2016 forward)

PRTA Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of PRTA shares?: During the previous two years, 140 institutional investors and hedge funds held shares of Prothena. The most heavily invested institutionals were FMR LLC ($387.46M), Price T Rowe Associates Inc. MD ($104.08M), Palo Alto Investors LP ($100.03M), Wellington Management Group LLP ($94.27M), Geode Capital Management LLC ($57.25M), Janus Henderson Group PLC ($32.44M), and Armistice Capital LLC ($32.20M).Learn more on PRTA's institutional investors.
What percentage of Prothena stock is owned by institutional investors?: 97.08% of Prothena stock is owned by institutional investors. Learn more on PRTA's institutional investor holdings.
Which institutional investors have been buying Prothena stock?: Of the 118 institutional investors that purchased Prothena stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: FMR LLC ($2.93M), Avidity Partners Management LP ($986K), Wellington Management Group LLP ($953.64K), Armistice Capital LLC ($742K), Artal Group S.A. ($500K), Price T Rowe Associates Inc. MD ($417.34K), and Bank of New York Mellon Corp ($396.81K).

How much institutional buying is happening at Prothena?: Institutional investors have bought a total of 11,221,473 shares in the last 24 months. This purchase volume represents approximately $548.50M in transactions.
Which Prothena major shareholders have been selling company stock?: Of the 68 institutional investors that sold Prothena stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Price T Rowe Associates Inc. MD ($3.02M), First Light Asset Management LLC ($1.48M), Janus Henderson Group PLC ($726.39K), PFM Health Sciences LP ($646.83K), Dimensional Fund Advisors LP ($565.15K), Renaissance Technologies LLC ($354.80K), and Prosight Management LP ($327.09K).
How much institutional selling is happening at Prothena?: Institutional investors have sold a total of 9,556,479 shares in the last 24 months. This volume of shares sold represents approximately $475.26M in transactions.