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Chicago Partners Investment Group’s Prothena Corp PRTA Stock Holding History

Chicago Partners Investment Group’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 		$138K Buy
16,129
+764
+5% +$7.54K ﹤0.01% 1460
2026
Q1 		$165K Buy
15,365
+143
+0.9% +$1.31K ﹤0.01% 1365
2025
Q4 		$152K Buy
15,222
+381
+3% +$3.88K ﹤0.01% 1252
2025
Q3 		$156K Buy
14,841
+82
+0.6% +$630 ﹤0.01% 1173
2025
Q2 		$99.8K Buy
14,759
+247
+2% +$1.85K ﹤0.01% 1066
2025
Q1 		$106K Buy
14,512
+3,315
+30% +$46.9K ﹤0.01% 897
2024
Q4 		$159K Buy
+11,197
New +$177K 0.01% 824
2018
Q2 		– Sell
-267
Closed -$10K – 981
2018
Q1 		$10K Hold
267
– – ﹤0.01% 775
2017
Q4 		$10K Sell
267
-108
-29% -$5.5K ﹤0.01% 749
2017
Q3 		$24K Buy
+375
New +$23K ﹤0.01% 585
2017
Q2 		– Sell
-458
Closed -$26K – 753
2017
Q1 		$26K Sell
458
-4,338
-90% -$228K 0.01% 385
2016
Q4 		$236K Sell
4,796
-695
-13% -$38.3K 0.09% 158
2016
Q3 		$329K Sell
5,491
-143
-3% -$7.67K 0.13% 126
2016
Q2 		$197K Sell
5,634
-462
-8% -$20.1K 0.09% 133
2016
Q1 		$251K Sell
6,096
-379
-6% -$14.8K 0.13% 105
2015
Q4 		$441K Sell
6,475
-393
-6% -$23.7K 0.21% 81
2015
Q3 		$311K Hold
6,868
– – 0.17% 87
2015
Q2 		$362K Sell
6,868
-6,600
-49% -$260K 0.16% 90
2015
Q1 		$280K Buy
13,468
+8,814
+189% +$226K 0.12% 106
2014
Q4 		$97K Buy
+4,654
New +$97.1K 0.04% 182

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 $3.38T AUM 44.17% 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

Chicago Partners Investment Group's PRTA Position: Q2 2026 in Review

Chicago Partners Investment Group increased its Prothena Corp (PRTA) stake by 5% in Q2 2026, buying an estimated $7.54K and bringing the position to 16,129 shares worth $138K. The position accounts for ﹤0.01% of the portfolio, ranked #1460.

Chicago Partners Investment Group first reported a position in PRTA in Q4 2014 and has held it in 20 quarters since. The position peaked at $441K in Q4 2015. 187 funds tracked by Wall St. Rank hold PRTA as of Q2 2026.

  • Chicago Partners Investment Group held 16,129 shares of Prothena Corp worth $138K as of Q2 2026.
  • Chicago Partners Investment Group bought 764 Prothena Corp shares in Q2 2026, an estimated $7.54K.
  • Prothena Corp made up ﹤0.01% of Chicago Partners Investment Group's portfolio in Q2 2026, its #1460 holding.
  • Chicago Partners Investment Group first reported a position in Prothena Corp in Q4 2014 and has held it in 20 quarters since.
  • Chicago Partners Investment Group's Prothena Corp position peaked at $441K in Q4 2015.
  • 187 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2026.

Based on Chicago Partners Investment Group's 13F filing for Q2 2026, filed 30 Jul 2026.