Simplex Trading
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Simplex Trading’s Rhythm Pharmaceuticals RYTM Stock Holding History

Simplex Trading’s Portfolio RYTM Stock Details RYTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		$590K Sell
6,200
-100
-2% -$10.7K ﹤0.01% 3353
2026
Q2 		$699K Buy
6,300
+6,100
+3,050% +$552K ﹤0.01% 3200
2026
Q1 		$17.4K Sell
200
-4,700
-96% -$457K ﹤0.01% 6885
2025
Q4 		$524K Buy
4,900
+4,600
+1,533% +$488K ﹤0.01% 3261
2025
Q3 		$30K Sell
300
-5,800
-95% -$538K ﹤0.01% 6989
2025
Q2 		$385K Buy
6,100
+5,000
+455% +$306K ﹤0.01% 3788
2025
Q1 		$58K Sell
1,100
-3,800
-78% -$211K ﹤0.01% 5613
2024
Q4 		$274K Sell
4,900
-1,100
-18% -$60.8K ﹤0.01% 4164
2024
Q3 		$314K Buy
6,000
+3,800
+173% +$182K ﹤0.01% 4077
2024
Q2 		$90K Sell
2,200
-1,400
-39% -$55.9K ﹤0.01% 5489
2024
Q1 		$155K Sell
3,600
-2,500
-41% -$109K ﹤0.01% 5115
2023
Q4 		$280K Buy
6,100
+2,900
+91% +$91.5K ﹤0.01% 4301
2023
Q3 		$73K Buy
3,200
+500
+19% +$11.2K ﹤0.01% 5432
2023
Q2 		$44K Sell
2,700
-5,100
-65% -$92.1K ﹤0.01% 5969
2023
Q1 		$139K Buy
7,800
+2,600
+50% +$65.3K ﹤0.01% 4771
2022
Q4 		$151K Sell
5,200
-19,500
-79% -$501K ﹤0.01% 4579
2022
Q3 		$605K Sell
24,700
-2,000
-7% -$37.2K ﹤0.01% 3249
2022
Q2 		$110K Buy
26,700
+21,800
+445% +$119K ﹤0.01% 5458
2022
Q1 		$56K Sell
4,900
-900
-16% -$7.9K ﹤0.01% 6988
2021
Q4 		$57K Sell
5,800
-5,100
-47% -$57.3K ﹤0.01% 7088
2021
Q3 		$225K Hold
10,900
– – ﹤0.01% 5412
2021
Q2 		$213K Buy
10,900
+10,798
+10,586% +$224K ﹤0.01% 5578
2021
Q1 		$216K Sell
102
-168
-62% -$4.87K ﹤0.01% 4627
2020
Q4 		$802K Buy
270
+267
+8,900% +$6.79K ﹤0.01% 2831
2020
Q3 		$6K Buy
+3
New +$69 ﹤0.01% 7045
2020
Q2 		– Sell
-13
Closed -$19K – 8259
2020
Q1 		$19K Buy
+13
New +$233 ﹤0.01% 6005

Other funds holding RYTM

JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $161B AUM 86.05% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $30.6B AUM 42.55% 1-Year Est. Return
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $71.4B AUM 33.43% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $704B AUM 26.74% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $4.23B AUM 121.47% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $106B AUM 32.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return

Simplex Trading's RYTM Position: Q3 2026 in Review

Simplex Trading increased its Rhythm Pharmaceuticals (RYTM) stake by 6.8% in Q3 2026, buying an estimated $25K and bringing the position to 3,669 shares worth $349K. The position accounts for ﹤0.01% of the portfolio, ranked #3995.

Simplex Trading first reported a position in RYTM in Q1 2020 and has held it in 13 quarters since. The position peaked at $381K in Q2 2026. 197 funds tracked by Wall St. Rank hold RYTM as of Q3 2026.

  • Simplex Trading held 3,669 shares of Rhythm Pharmaceuticals worth $349K as of Q3 2026.
  • Simplex Trading bought 234 Rhythm Pharmaceuticals shares in Q3 2026, an estimated $25K.
  • Rhythm Pharmaceuticals made up ﹤0.01% of Simplex Trading's portfolio in Q3 2026, its #3995 holding.
  • Simplex Trading first reported a position in Rhythm Pharmaceuticals in Q1 2020 and has held it in 13 quarters since.
  • Simplex Trading's Rhythm Pharmaceuticals position peaked at $381K in Q2 2026.
  • 197 funds tracked by Wall St. Rank held Rhythm Pharmaceuticals as of Q3 2026.

Based on Simplex Trading's 13F filing for Q3 2026, filed 4 Nov 2026.