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Boothbay Fund Management’s Prothena Corp PRTA Stock Holding History

Boothbay Fund 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
2025
Q3 		– Sell
-29,600
Closed -$180K – 2101
2025
Q2 		$180K Hold
29,600
– – ﹤0.01% 1261
2025
Q1 		$366K Buy
+29,600
New +$419K 0.01% 978
2024
Q1 		– Sell
-158,800
Closed -$5.77M – 1861
2023
Q4 		$5.77M Buy
+158,800
New +$6.11M 0.15% 162
2022
Q4 		– Sell
-5,300
Closed -$321K – 2369
2022
Q3 		$321K Buy
+5,300
New +$168K 0.01% 1491
2019
Q4 		– Sell
-507
Closed -$397K – 953
2019
Q3 		$397K Hold
507
– – 0.04% 513
2019
Q2 		$536K Buy
+507
New +$5.21K 0.05% 393
2018
Q2 		– Sell
-225
Closed -$826K – 864
2018
Q1 		$826K Buy
+225
New +$8.18K 0.1% 210

Other funds holding PRTA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
AC
Armistice Capital New York $8.17B AUM 68.82% 1-Year Est. Return
ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $724M AUM 96.91% 1-Year Est. Return

Boothbay Fund Management's PRTA Position: Q4 2025 in Review

Boothbay Fund Management sold out of Prothena Corp (PRTA) in Q4 2025, closing a stake of 30,000 shares — an estimated $293K sold.

Boothbay Fund Management first reported a position in PRTA in Q1 2019 and held it in 5 quarters. The position peaked at $1.5M in Q4 2020. 181 funds tracked by Wall St. Rank hold PRTA as of Q4 2025.

  • Boothbay Fund Management reported no remaining Prothena Corp position as of Q4 2025 after selling out during the quarter.
  • Boothbay Fund Management sold 30,000 Prothena Corp shares in Q4 2025, an estimated $293K.
  • Boothbay Fund Management first reported a position in Prothena Corp in Q1 2019 and held it in 5 quarters.
  • Boothbay Fund Management's Prothena Corp position peaked at $1.5M in Q4 2020.
  • 181 funds tracked by Wall St. Rank held Prothena Corp as of Q4 2025.

Based on Boothbay Fund Management's 13F filing for Q4 2025, filed 17 Feb 2026.