Tang Capital Management’s Prothena Corp PRTA Stock Holding History

Tang Capital Management’s Portfolio PRTA Stock Details PRTA Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2020 Q4	–	Sell	-178,688	Closed	-$1.78M	–	16
2020 Q3	$1.78M	Sell	178,688 -95,135	-35%	-$1.14M	0.32%	18
2020 Q2	$2.86M	Sell	273,823 -150,000	-35%	-$1.67M	0.28%	16
2020 Q1	$4.54M	Hold	423,823	–	–	0.64%	16
2019 Q4	$6.71M	Hold	423,823	–	–	0.8%	11
2019 Q3	$3.32M	Buy	423,823 +100,000	+31%	+$888K	0.57%	10
2019 Q2	$3.42M	Hold	323,823	–	–	0.46%	8
2019 Q1	$3.93M	Buy	323,823 +276,213	+580%	+$3.45M	0.72%	7
2018 Q4	$490K	Buy	+47,610	New	+$566K	0.11%	7

Other funds holding PRTA

EcoR1 Capital San Francisco, California $2.36B AUM 204.53% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

FLAM

First Light Asset Management Edina, Minnesota $1.12B AUM 114.45% 1-Year Est. Return

OrbiMed New York $5.05B AUM 125.28% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

PAI

Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Ikarian Capital Dallas, Texas $1.23B AUM 600.17% 1-Year Est. Return

RSCM

Rock Springs Capital Management Baltimore, Maryland $1.7B AUM 93.03% 1-Year Est. Return

Prosight Management Dallas, Texas $610M AUM 40.86% 1-Year Est. Return

Tang Capital Management's PRTA Position: Q4 2020 in Review

Tang Capital Management sold out of Prothena Corp (PRTA) in Q4 2020, closing a stake of 178,688 shares — an estimated $1.78M sold.

Tang Capital Management first reported a position in PRTA in Q4 2018 and held it in 8 quarters. The position peaked at $6.71M in Q4 2019. 140 funds tracked by Wall St. Rank hold PRTA as of Q4 2020.

Tang Capital Management reported no remaining Prothena Corp position as of Q4 2020 after selling out during the quarter.
Tang Capital Management sold 178,688 Prothena Corp shares in Q4 2020, an estimated $1.78M.
Tang Capital Management first reported a position in Prothena Corp in Q4 2018 and held it in 8 quarters.
Tang Capital Management's Prothena Corp position peaked at $6.71M in Q4 2019.
140 funds tracked by Wall St. Rank held Prothena Corp as of Q4 2020.

Based on Tang Capital Management's 13F filing for Q4 2020, filed 16 Feb 2021.