Norges Bank’s Prothena Corp PRTA Stock Holding History

Norges Bank’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
2025 Q3	–	Sell	-57,454	Closed	-$349K	–	1173
2025 Q2	$349K	Hold	57,454	–	–	﹤0.01%	1659
2025 Q1	$711K	Hold	57,454	–	–	﹤0.01%	1665
2024 Q4	$796K	Hold	57,454	–	–	﹤0.01%	1776
2024 Q3	$961K	Hold	57,454	–	–	﹤0.01%	1733
2024 Q2	$1.19M	Hold	57,454	–	–	﹤0.01%	1801
2024 Q1	$1.42M	Sell	57,454 -47,110	-45%	-$1.4M	﹤0.01%	1766
2023 Q4	$3.8M	Hold	104,564	–	–	﹤0.01%	1723
2023 Q3	$5.05M	Hold	104,564	–	–	﹤0.01%	1671
2023 Q2	$7.14M	Sell	104,564 -114,250	-52%	-$7.37M	﹤0.01%	1626
2023 Q1	$10.6M	Buy	218,814 +159,555	+269%	+$8.43M	﹤0.01%	1560
2022 Q4	$3.57M	Buy	59,259 +23,859	+67%	+$1.4M	﹤0.01%	1872
2022 Q3	$2.15M	Sell	35,400 -41,400	-54%	-$1.31M	﹤0.01%	1901
2022 Q2	$2.09M	Hold	76,800	–	–	﹤0.01%	1893
2022 Q1	$2.81M	Hold	76,800	–	–	﹤0.01%	1946
2021 Q4	$3.79M	Buy	+76,800	New	+$4.26M	﹤0.01%	1956
2019 Q3	–	Sell	-48,780	Closed	-$516K	–	2105
2019 Q2	$516K	Sell	48,780 -70,773	-59%	-$727K	﹤0.01%	2053
2019 Q1	$1.45M	Sell	119,553 -95,238	-44%	-$1.19M	﹤0.01%	2030
2018 Q4	$2.21M	Sell	214,791 -162,025	-43%	-$1.93M	﹤0.01%	1997
2018 Q3	$4.93M	Hold	376,816	–	–	﹤0.01%	1970
2018 Q2	$5.49M	Hold	376,816	–	–	﹤0.01%	1934
2018 Q1	$13.8M	Buy	376,816 +28,800	+8%	+$1.05M	0.01%	1630
2017 Q4	$13M	Hold	348,016	–	–	﹤0.01%	1642
2017 Q3	$22.5M	Buy	348,016 +37,059	+12%	+$2.27M	0.01%	1364
2017 Q2	$16.8M	Sell	310,957 -48,469	-13%	-$2.58M	0.01%	1514
2017 Q1	$20.1M	Sell	359,426 -12,127	-3%	-$637K	0.01%	1393
2016 Q4	$18.3M	Hold	371,553	–	–	0.01%	1381
2016 Q3	$21.3M	Buy	371,553 +41,500	+13%	+$2.23M	0.01%	1210
2016 Q2	$11.5M	Hold	330,053	–	–	0.01%	1533
2016 Q1	$13.6M	Sell	330,053 -18,153	-5%	-$710K	0.01%	1400
2015 Q4	$23.7M	Buy	348,206 +89,129	+34%	+$5.38M	0.01%	1058
2015 Q3	$11.7M	Buy	259,077 +69,813	+37%	+$4.07M	0.01%	1462
2015 Q2	$9.97M	Hold	189,264	–	–	0.01%	1620
2015 Q1	$7.22M	Sell	189,264 -597	-0.3%	-$15.3K	﹤0.01%	1788
2014 Q4	$3.94M	Sell	189,861 -60,085	-24%	-$1.25M	﹤0.01%	1976
2014 Q3	$5.54M	Sell	249,946 -249,946	-50%	-$5.3M	﹤0.01%	1886
2014 Q2	$11.3M	Buy	499,892 +245,561	+97%	+$6.14M	﹤0.01%	1899
2014 Q1	$9.74M	Sell	254,331 -5,969	-2%	-$192K	0.01%	1592
2013 Q4	$6.9M	Sell	260,300 -89,712	-26%	-$2.25M	﹤0.01%	1769
2013 Q3	$7.08M	Hold	350,012	–	–	﹤0.01%	1747
2013 Q2	$4.52M	Buy	+350,012	New	+$3.26M	﹤0.01%	1882

Other funds holding PRTA

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

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

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return

RCMNY

Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return

ACM

ADAR1 Capital Management Austin, Texas $1.7B AUM 340.85% 1-Year Est. Return

PAI

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

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Norges Bank's PRTA Position: Q3 2025 in Review

Norges Bank sold out of Prothena Corp (PRTA) in Q3 2025, closing a stake of 57,454 shares — an estimated $349K sold.

Norges Bank first reported a position in PRTA in Q2 2013 and held it in 40 quarters. The position peaked at $23.7M in Q4 2015. 187 funds tracked by Wall St. Rank hold PRTA as of Q3 2025.

Norges Bank reported no remaining Prothena Corp position as of Q3 2025 after selling out during the quarter.
Norges Bank sold 57,454 Prothena Corp shares in Q3 2025, an estimated $349K.
Norges Bank first reported a position in Prothena Corp in Q2 2013 and held it in 40 quarters.
Norges Bank's Prothena Corp position peaked at $23.7M in Q4 2015.
187 funds tracked by Wall St. Rank held Prothena Corp as of Q3 2025.

Based on Norges Bank's 13F filing for Q3 2025.