VIA
PRTA icon

Virtus Investment Advisers’s Prothena Corp PRTA Stock Holding History

Virtus Investment Advisers’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 		$388K Buy
39,660
+13,340
+51% +$132K 0.09% 294
2026
Q1 		$256K Buy
26,320
+641
+2% +$5.87K 0.07% 311
2025
Q4 		$245K Buy
25,679
+3,236
+14% +$32.9K 0.07% 337
2025
Q3 		$219K Buy
22,443
+3,896
+21% +$29.9K 0.06% 252
2025
Q2 		$113K Buy
18,547
+6,656
+56% +$50K 0.04% 324
2025
Q1 		$147K Buy
+11,891
New +$168K 0.04% 340

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

Virtus Investment Advisers's PRTA Position: Q2 2026 in Review

Virtus Investment Advisers increased its Prothena Corp (PRTA) stake by 51% in Q2 2026, buying an estimated $132K and bringing the position to 39,660 shares worth $388K. The position accounts for 0.09% of the portfolio, ranked #294.

Virtus Investment Advisers first reported a position in PRTA in Q1 2025 and has held it in 6 quarters since. 188 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Virtus Investment Advisers held 39,660 shares of Prothena Corp worth $388K as of Q2 2026.
  • Virtus Investment Advisers bought 13,340 Prothena Corp shares in Q2 2026, an estimated $132K.
  • Prothena Corp made up 0.09% of Virtus Investment Advisers's portfolio in Q2 2026, its #294 holding.
  • Virtus Investment Advisers first reported a position in Prothena Corp in Q1 2025 and has held it in 6 quarters since.
  • 188 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Virtus Investment Advisers's 13F filing for Q2 2026, filed 11 Aug 2026.