Simplex Trading
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Simplex Trading’s Protagonist Therapeutics PTGX Stock Holding History

Simplex Trading’s Portfolio PTGX Stock Details PTGX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$386K Buy
+3,149
New +$329K ﹤0.01% 3933
2025
Q3 		– Sell
-9,452
Closed -$537K – 9848
2025
Q2 		$522K Sell
9,452
-16,482
-64% -$791K ﹤0.01% 3462
2025
Q1 		$1.25M Buy
25,934
+20,447
+373% +$857K ﹤0.01% 2479
2024
Q4 		$211K Buy
+5,487
New +$239K ﹤0.01% 4457
2024
Q2 		– Sell
-2,250
Closed -$65.9K – 9603
2024
Q1 		$65K Sell
2,250
-584
-21% -$15.9K ﹤0.01% 6031
2023
Q4 		$64K Buy
+2,834
New +$49.6K ﹤0.01% 5848
2023
Q3 		– Sell
-25,214
Closed -$489K – 9593
2023
Q2 		$696K Sell
25,214
-37,845
-60% -$947K ﹤0.01% 2966
2023
Q1 		$1.45M Buy
+63,059
New +$1.06M ﹤0.01% 2231
2022
Q4 		– Sell
-755
Closed -$6.37K – 10171
2022
Q3 		$6K Sell
755
-8,882
-92% -$84K ﹤0.01% 8668
2022
Q2 		$76K Buy
9,637
+4,665
+94% +$56.4K ﹤0.01% 5949
2022
Q1 		$117K Buy
4,972
+3,168
+176% +$89.3K ﹤0.01% 5929
2021
Q4 		$61K Buy
+1,804
New +$57K ﹤0.01% 6979
2021
Q1 		– Sell
-944
Closed -$23.9K – 9790
2020
Q4 		$19K Buy
+944
New +$20.3K ﹤0.01% 7009

Other funds holding PTGX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
FCM
Farallon Capital Management San Francisco, California $21.7B AUM 79.24% 1-Year Est. Return
RI
RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
JJ
Johnson & Johnson New Brunswick, New Jersey $799M AUM 253.51% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Simplex Trading's PTGX Position: Q2 2026 in Review

Simplex Trading opened a new position in Protagonist Therapeutics (PTGX) in Q2 2026: 3,149 shares worth $386K. The stake represents ﹤0.01% of the portfolio and ranks #3933 among its holdings. This is a return to the name: Simplex Trading previously reported a position in PTGX as recently as Q2 2025.

Simplex Trading first reported a position in PTGX in Q4 2020 and has held it in 13 quarters since. The position peaked at $1.45M in Q1 2023. 343 funds tracked by Wall St. Rank hold PTGX as of Q2 2026.

  • Simplex Trading held 3,149 shares of Protagonist Therapeutics worth $386K as of Q2 2026.
  • Protagonist Therapeutics was a new Simplex Trading position in Q2 2026.
  • Protagonist Therapeutics made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #3933 holding.
  • Simplex Trading first reported a position in Protagonist Therapeutics in Q4 2020 and has held it in 13 quarters since.
  • Simplex Trading's Protagonist Therapeutics position peaked at $1.45M in Q1 2023.
  • 343 funds tracked by Wall St. Rank held Protagonist Therapeutics as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.