Michael Gelband’s Prothena Corp PRTA Stock Holding History

Michael Gelband’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
2026 Q2	$803K	Buy	82,023 +70,851	+634%	+$700K	0.01%	1125
2026 Q1	$109K	Sell	11,172 -76,818	-87%	-$704K	﹤0.01%	1432
2025 Q4	$840K	Buy	87,990 +57,736	+191%	+$588K	0.01%	1052
2025 Q3	$295K	Sell	30,254 -28,664	-49%	-$220K	﹤0.01%	1311
2025 Q2	$358K	Buy	58,918 +17,646	+43%	+$132K	﹤0.01%	1216
2025 Q1	$511K	Buy	+41,272	New	+$584K	0.01%	1109
2024 Q3	–	Sell	-47,107	Closed	-$972K	–	2003
2024 Q2	$972K	Buy	+47,107	New	+$1.02M	0.01%	1030
2023 Q4	–	Sell	-60,853	Closed	-$2.94M	–	1938
2023 Q3	$2.94M	Buy	+60,853	New	+$3.62M	0.03%	544
2022 Q3	–	Sell	-42,213	Closed	-$1.15M	–	2217
2022 Q2	$1.15M	Sell	42,213 -28,489	-40%	-$833K	0.01%	1020
2022 Q1	$2.59M	Sell	70,702 -92,156	-57%	-$3.32M	0.03%	653
2021 Q4	$8.04M	Buy	+162,858	New	+$9.03M	0.08%	279
2021 Q1	–	Sell	-15,692	Closed	-$188K	–	2501
2020 Q4	$188K	Sell	15,692 -7,808	-33%	-$92.3K	﹤0.01%	1749
2020 Q3	$235K	Buy	23,500 +11,012	+88%	+$132K	﹤0.01%	1403
2020 Q2	$131K	Buy	+12,488	New	+$139K	﹤0.01%	1602

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

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

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

Michael Gelband's PRTA Position: Q2 2026 in Review

Michael Gelband increased its Prothena Corp (PRTA) stake by 634% in Q2 2026, buying an estimated $700K and bringing the position to 82,023 shares worth $803K. The position accounts for 0.01% of the portfolio, ranked #1125.

Michael Gelband first reported a position in PRTA in Q2 2020 and has held it in 14 quarters since. The position peaked at $8.04M in Q4 2021. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

Michael Gelband held 82,023 shares of Prothena Corp worth $803K as of Q2 2026.
Michael Gelband bought 70,851 Prothena Corp shares in Q2 2026, an estimated $700K.
Prothena Corp made up 0.01% of Michael Gelband's portfolio in Q2 2026, its #1125 holding.
Michael Gelband first reported a position in Prothena Corp in Q2 2020 and has held it in 14 quarters since.
Michael Gelband's Prothena Corp position peaked at $8.04M in Q4 2021.
187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on ExodusPoint Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.