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Rangeley Capital’s Prothena Corp PRTA Stock Holding History

Rangeley Capital’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 		$4.09M Sell
417,270
-32,190
-7% -$318K 3.73% 3
2026
Q1 		$4.37M Sell
449,460
-75,140
-14% -$689K 4.24% 3
2025
Q4 		$5.01M Sell
524,600
-35,857
-6% -$365K 4.16% 4
2025
Q3 		$5.47M Sell
560,457
-154,910
-22% -$1.19M 4.73% 4
2025
Q2 		$4.34M Buy
+715,367
New +$5.37M 5.18% 5

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

Rangeley Capital's PRTA Position: Q2 2026 in Review

Rangeley Capital reduced its Prothena Corp (PRTA) stake by 7.2% in Q2 2026, selling an estimated $318K and leaving 417,270 shares worth $4.09M. The position accounts for 3.73% of the portfolio, ranked #3.

Rangeley Capital first reported a position in PRTA in Q2 2025 and has held it in 5 quarters since. The position peaked at $5.47M in Q3 2025. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Rangeley Capital held 417,270 shares of Prothena Corp worth $4.09M as of Q2 2026.
  • Rangeley Capital sold 32,190 Prothena Corp shares in Q2 2026, an estimated $318K.
  • Prothena Corp made up 3.73% of Rangeley Capital's portfolio in Q2 2026, its #3 holding.
  • Rangeley Capital first reported a position in Prothena Corp in Q2 2025 and has held it in 5 quarters since.
  • Rangeley Capital's Prothena Corp position peaked at $5.47M in Q3 2025.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

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