Rafferty Asset Management
PRTA icon

Rafferty Asset Management’s Prothena Corp PRTA Stock Holding History

Rafferty Asset 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
2026
Q2 		$395K Sell
40,397
-12,869
-24% -$127K ﹤0.01% 953
2026
Q1 		$518K Sell
53,266
-29,287
-35% -$268K ﹤0.01% 884
2025
Q4 		$788K Buy
+82,553
New +$840K ﹤0.01% 836
2025
Q2 		– Sell
-43,978
Closed -$544K – 1099
2025
Q1 		$544K Sell
43,978
-33,694
-43% -$476K ﹤0.01% 846
2024
Q4 		$1.08M Buy
77,672
+15,442
+25% +$244K ﹤0.01% 778
2024
Q3 		$1.04M Sell
62,230
-34,789
-36% -$748K ﹤0.01% 791
2024
Q2 		$2M Sell
97,019
-206,436
-68% -$4.47M 0.01% 639
2024
Q1 		$7.52M Buy
303,455
+96,036
+46% +$2.86M 0.03% 364
2023
Q4 		$7.54M Buy
207,419
+50,579
+32% +$1.95M 0.03% 349
2023
Q3 		$7.57M Buy
156,840
+37,262
+31% +$2.21M 0.04% 296
2023
Q2 		$8.16M Sell
119,578
-22,111
-16% -$1.43M 0.05% 265
2023
Q1 		$6.87M Buy
141,689
+3,336
+2% +$176K 0.05% 298
2022
Q4 		$8.34M Buy
138,353
+31,687
+30% +$1.86M 0.07% 244
2022
Q3 		$6.47M Buy
106,666
+25,194
+31% +$796K 0.07% 255
2022
Q2 		$2.21M Sell
81,472
-62,075
-43% -$1.82M 0.02% 442
2022
Q1 		$5.25M Buy
143,547
+22,879
+19% +$825K 0.03% 380
2021
Q4 		$5.96M Buy
120,668
+79,871
+196% +$4.43M 0.03% 306
2021
Q3 		$2.91M Buy
40,797
+6,621
+19% +$411K 0.02% 495
2021
Q2 		$1.76M Sell
34,176
-6,902
-17% -$215K 0.01% 725
2021
Q1 		$1.03M Buy
+41,078
New +$773K 0.01% 764
2020
Q4 		– Sell
-23,019
Closed -$230K – 1042
2020
Q3 		$230K Buy
23,019
+11,502
+100% +$138K ﹤0.01% 893
2020
Q2 		$120K Buy
+11,517
New +$128K ﹤0.01% 961
2020
Q1 		– Sell
-12,482
Closed -$198K – 759
2019
Q4 		$198K Sell
12,482
-26,466
-68% -$284K ﹤0.01% 851
2019
Q3 		$305K Sell
38,948
-9,708
-20% -$86.2K ﹤0.01% 745
2019
Q2 		$514K Sell
48,656
-6,225
-11% -$63.9K 0.01% 682
2019
Q1 		$666K Buy
+54,881
New +$685K 0.01% 618

Other funds holding PRTA

Fidelity Investments
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
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
D.E. Shaw & Co
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
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

Rafferty Asset Management's PRTA Position: Q2 2026 in Review

Rafferty Asset Management reduced its Prothena Corp (PRTA) stake by 24% in Q2 2026, selling an estimated $127K and leaving 40,397 shares worth $395K. The position accounts for ﹤0.01% of the portfolio, ranked #953.

Rafferty Asset Management first reported a position in PRTA in Q1 2019 and has held it in 26 quarters since. The position peaked at $8.34M in Q4 2022. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Rafferty Asset Management held 40,397 shares of Prothena Corp worth $395K as of Q2 2026.
  • Rafferty Asset Management sold 12,869 Prothena Corp shares in Q2 2026, an estimated $127K.
  • Prothena Corp made up ﹤0.01% of Rafferty Asset Management's portfolio in Q2 2026, its #953 holding.
  • Rafferty Asset Management first reported a position in Prothena Corp in Q1 2019 and has held it in 26 quarters since.
  • Rafferty Asset Management's Prothena Corp position peaked at $8.34M in Q4 2022.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

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