Prothena Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of 0Y3M?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	2,484,663	4.5%
Hedge Funds	11,584,280	21.2%
Institutions	40,562,936	74.2%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 12.7%.

Top Shareholders

Top 25 shareholders own 89.3% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
21.96%	EcoR1 Capital, LLC	11,584,280	$838.0m	0%	23.43%
12.82%	FMR LLC	6,762,010	$489.2m	71.31%	0.04%
7.8%	T. Rowe Price Group, Inc.	4,116,976	$297.8m	-0.41%	0.03%
6.87%	BlackRock, Inc.	3,624,627	$262.2m	4%	0.01%
4.67%	William Scully	2,463,000	$178.2m	0%	no data
4.3%	Wellington Management Group LLP	2,266,078	$163.9m	28.4%	0.03%
3.99%	State Street Global Advisors, Inc.	2,102,458	$152.1m	2.46%	0.01%
3.15%	Palo Alto Investors LP	1,663,777	$120.4m	0.31%	10.12%
3.03%	Janus Henderson Group plc	1,596,303	$115.5m	11.45%	0.06%
2.86%	First Light Asset Management, LLC	1,511,168	$109.3m	-1.59%	9.96%
2.34%	Dimensional Fund Advisors LP	1,232,635	$89.2m	-6.65%	0.02%
2.02%	Avidity Partners Management, L.P.	1,068,200	$77.3m	-63.83%	2.44%
1.79%	The Vanguard Group, Inc.	944,556	$68.3m	8.55%	no data
1.48%	Geode Capital Management, LLC	779,824	$56.4m	8.97%	0.01%
1.47%	PFM Health Sciences, LP	774,546	$56.0m	-11.53%	2.59%
1.43%	Rock Springs Capital Management LP	753,462	$54.5m	0%	1.27%
1.06%	Bank of America Corporation, Asset Management Arm	559,559	$40.5m	533.67%	0.02%
0.96%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	506,728	$36.7m	-11.53%	0.01%
0.85%	Prosight Management, LP	447,092	$32.3m	35.48%	13.33%
0.83%	Eventide Asset Management, LLC	438,732	$31.7m	0%	0.59%
0.77%	Renaissance Technologies LLC	407,300	$29.5m	-14.23%	0.04%
0.73%	Northern Trust Global Investments	382,688	$27.7m	5.84%	0.01%
0.72%	Two Sigma Advisers, LP	381,300	$27.6m	16.61%	0.08%
0.71%	Point72 Asset Management, L.P.	376,648	$27.2m	6.7%	0.07%
0.69%	Two Sigma Investments, LP	365,539	$26.4m	79.68%	0.09%