Teacher Retirement System of Texas
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Teacher Retirement System of Texas’s Prothena Corp PRTA Stock Holding History

Teacher Retirement System of Texas’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
Q1 		– Sell
-10,434
Closed -$145K – 2117
2024
Q4 		$145K Buy
+10,434
New +$165K ﹤0.01% 1495
2024
Q2 		– Sell
-8,956
Closed -$222K – 1672
2024
Q1 		$222K Sell
8,956
-310
-3% -$9.22K ﹤0.01% 1557
2023
Q4 		$337K Sell
9,266
-1,965
-17% -$75.6K ﹤0.01% 1529
2023
Q3 		$542K Buy
11,231
+529
+5% +$31.4K ﹤0.01% 1363
2023
Q2 		$731K Buy
10,702
+270
+3% +$17.4K ﹤0.01% 1236
2023
Q1 		$506K Buy
10,432
+694
+7% +$36.7K ﹤0.01% 1472
2022
Q4 		$587K Sell
9,738
-944
-9% -$55.3K ﹤0.01% 1398
2022
Q3 		$648K Buy
+10,682
New +$338K ﹤0.01% 1400
2022
Q2 		– Sell
-6,685
Closed -$244K – 2134
2022
Q1 		$244K Buy
6,685
+685
+11% +$24.7K ﹤0.01% 1843
2021
Q4 		$296K Buy
6,000
+1,191
+25% +$66K ﹤0.01% 1791
2021
Q3 		$343K Buy
+4,809
New +$299K ﹤0.01% 1595
2018
Q2 		– Sell
-8,489
Closed -$312K – 1961
2018
Q1 		$312K Sell
8,489
-4,341
-34% -$158K ﹤0.01% 1503
2017
Q4 		$481K Buy
12,830
+9,654
+304% +$492K ﹤0.01% 1532
2017
Q3 		$206K Buy
+3,176
New +$195K ﹤0.01% 1056
2016
Q3 		– Sell
-4,021
Closed -$141K – 1871
2016
Q2 		$141K Buy
4,021
+493
+14% +$21.5K ﹤0.01% 1647
2016
Q1 		$145K Buy
3,528
+606
+21% +$23.7K ﹤0.01% 1545
2015
Q4 		$199K Sell
2,922
-917
-24% -$55.3K ﹤0.01% 1122
2015
Q3 		$174K Buy
3,839
+2,655
+224% +$155K ﹤0.01% 1421
2015
Q2 		$62K Buy
1,184
+354
+43% +$14K ﹤0.01% 1414
2015
Q1 		$32K Buy
830
+1
+0.1% +$26 ﹤0.01% 1733
2014
Q4 		$17K Buy
+829
New +$17.3K ﹤0.01% 1992

Other funds holding PRTA

EC
EcoR1 Capital San Francisco, California $2.36B AUM 204.53% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
AC
Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Teacher Retirement System of Texas's PRTA Position: Q1 2025 in Review

Teacher Retirement System of Texas sold out of Prothena Corp (PRTA) in Q1 2025, closing a stake of 10,434 shares — an estimated $145K sold.

Teacher Retirement System of Texas first reported a position in PRTA in Q4 2014 and held it in 21 quarters. The position peaked at $731K in Q2 2023. 161 funds tracked by Wall St. Rank hold PRTA as of Q1 2025.

  • Teacher Retirement System of Texas reported no remaining Prothena Corp position as of Q1 2025 after selling out during the quarter.
  • Teacher Retirement System of Texas sold 10,434 Prothena Corp shares in Q1 2025, an estimated $145K.
  • Teacher Retirement System of Texas first reported a position in Prothena Corp in Q4 2014 and held it in 21 quarters.
  • Teacher Retirement System of Texas's Prothena Corp position peaked at $731K in Q2 2023.
  • 161 funds tracked by Wall St. Rank held Prothena Corp as of Q1 2025.

Based on Teacher Retirement System of Texas's 13F filing for Q1 2025, filed 28 Apr 2025.