David Shaw’s Prothena Corp PRTA Stock Holding History

David Shaw’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
2024 Q3	–	Sell	-11,100	Closed	-$229K	–	4800
2024 Q2	$229K	Buy	+11,100	New	+$240K	﹤0.01%	4024
2022 Q3	–	Sell	-13,400	Closed	-$364K	–	5457
2022 Q2	$364K	Hold	13,400	–	–	﹤0.01%	4275
2022 Q1	$490K	Hold	13,400	–	–	﹤0.01%	4381
2021 Q4	$662K	Sell	13,400 -18,600	-58%	-$1.03M	﹤0.01%	4232
2021 Q3	$2.28M	Buy	+32,000	New	+$1.99M	﹤0.01%	2915
2019 Q1	–	Sell	-46,000	Closed	-$474K	–	3859
2018 Q4	$474K	Buy	+46,000	New	+$547K	﹤0.01%	3119
2016 Q1	–	Sell	-20,000	Closed	-$1.36M	–	3705
2015 Q4	$1.36M	Buy	+20,000	New	+$1.21M	﹤0.01%	2438

Other funds holding PRTA

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

RCMNY

Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

ACM

ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

PAI

Palo Alto Investors Palo Alto, California $724M AUM 96.91% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

David Shaw's PRTA Position: Q2 2026 in Review

David Shaw reduced its Prothena Corp (PRTA) stake by 8.6% in Q2 2026, selling an estimated $1.5M and leaving 1,611,457 shares worth $15.8M. The position accounts for 0.01% of the portfolio, ranked #1465.

David Shaw first reported a position in PRTA in Q2 2014 and has held it in 35 quarters since. The position peaked at $17.1M in Q1 2026. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

David Shaw held 1,611,457 shares of Prothena Corp worth $15.8M as of Q2 2026.
David Shaw sold 151,890 Prothena Corp shares in Q2 2026, an estimated $1.5M.
Prothena Corp made up 0.01% of David Shaw's portfolio in Q2 2026, its #1465 holding.
David Shaw first reported a position in Prothena Corp in Q2 2014 and has held it in 35 quarters since.
David Shaw's Prothena Corp position peaked at $17.1M in Q1 2026.
187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.