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 		$564K Buy
+4,600
New +$480K ﹤0.01% 3463
2025
Q4 		– Sell
-6,800
Closed -$451K – 9778
2025
Q3 		$451K Sell
6,800
-31,400
-82% -$1.78M ﹤0.01% 3955
2025
Q2 		$2.11M Sell
38,200
-4,400
-10% -$211K ﹤0.01% 2053
2025
Q1 		$2.06M Buy
42,600
+13,800
+48% +$578K ﹤0.01% 2004
2024
Q4 		$1.11M Buy
28,800
+28,600
+14,300% +$1.25M ﹤0.01% 2737
2024
Q3 		$9K Buy
200
+100
+100% +$4.04K ﹤0.01% 7270
2024
Q2 		$3K Sell
100
-3,000
-97% -$87.9K ﹤0.01% 8146
2024
Q1 		$89K Sell
3,100
-16,200
-84% -$441K ﹤0.01% 5712
2023
Q4 		$442K Buy
19,300
+19,000
+6,333% +$332K ﹤0.01% 3826
2023
Q3 		$5K Sell
300
-12,200
-98% -$237K ﹤0.01% 7681
2023
Q2 		$345K Sell
12,500
-10,900
-47% -$273K ﹤0.01% 3687
2023
Q1 		$538K Buy
23,400
+19,800
+550% +$333K ﹤0.01% 3187
2022
Q4 		$39K Buy
3,600
+3,300
+1,100% +$27.8K ﹤0.01% 6178
2022
Q3 		$2K Sell
300
-74,600
-100% -$706K ﹤0.01% 9335
2022
Q2 		$592K Sell
74,900
-1,500
-2% -$18.1K ﹤0.01% 3237
2022
Q1 		$1.81M Buy
76,400
+76,200
+38,100% +$2.15M ﹤0.01% 2213
2021
Q4 		$6K Hold
200
– – ﹤0.01% 9427
2021
Q3 		$9K Hold
200
– – ﹤0.01% 9000
2021
Q2 		$8K Buy
200
+199
+19,900% +$6.57K ﹤0.01% 9236
2021
Q1 		$2K Sell
1
-3
-75% -$76 ﹤0.01% 8482
2020
Q4 		$8K Hold
4
– – ﹤0.01% 7538
2020
Q3 		$7K Buy
+4
New +$75 ﹤0.01% 6967

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 $3.37T AUM 44.26% 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. 344 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.
  • 344 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.