Jane Street
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Jane Street’s Rhythm Pharmaceuticals RYTM Stock Holding History

Jane Street’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 		$2.29M Buy
24,100
+100
+0.4% +$10.7K ﹤0.01% 4906
2026
Q2 		$2.66M Buy
24,000
+20,100
+515% +$1.82M ﹤0.01% 4687
2026
Q1 		$339K Buy
+3,900
New +$379K ﹤0.01% 8957
2025
Q4 		– Sell
-14,700
Closed -$1.48M – 12206
2025
Q3 		$1.48M Sell
14,700
-38,000
-72% -$3.53M ﹤0.01% 5485
2025
Q2 		$3.33M Buy
+52,700
New +$3.23M ﹤0.01% 3592
2024
Q4 		– Sell
-18,700
Closed -$980K – 10419
2024
Q3 		$980K Sell
18,700
-10,500
-36% -$503K ﹤0.01% 5930
2024
Q2 		$1.2M Sell
29,200
-28,200
-49% -$1.13M ﹤0.01% 5434
2024
Q1 		$2.49M Buy
57,400
+43,400
+310% +$1.9M ﹤0.01% 3746
2023
Q4 		$644K Buy
+14,000
New +$442K ﹤0.01% 6337
2023
Q1 		– Sell
-102,800
Closed -$2.99M – 9804
2022
Q4 		$2.99M Sell
102,800
-22,200
-18% -$570K ﹤0.01% 3229
2022
Q3 		$3.06M Buy
+125,000
New +$2.32M ﹤0.01% 3421

Other funds holding RYTM

BlackRock
BlackRock New York $6.79T AUM 37.06% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.84T AUM 33.86% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.21T AUM
Primecap Management
Primecap Management Pasadena, California $161B AUM 86.05% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.76T AUM
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

Jane Street's RYTM Position: Q3 2026 in Review

Jane Street reduced its Rhythm Pharmaceuticals (RYTM) stake by 22% in Q3 2026, selling an estimated $62.2K and leaving 2,127 shares worth $203K. The position accounts for ﹤0.01% of the portfolio, ranked #10054.

Jane Street first reported a position in RYTM in Q2 2018 and has held it in 20 quarters since. The position peaked at $8.47M in Q4 2023. 239 funds tracked by Wall St. Rank hold RYTM as of Q3 2026.

  • Jane Street held 2,127 shares of Rhythm Pharmaceuticals worth $203K as of Q3 2026.
  • Jane Street sold 583 Rhythm Pharmaceuticals shares in Q3 2026, an estimated $62.2K.
  • Rhythm Pharmaceuticals made up ﹤0.01% of Jane Street's portfolio in Q3 2026, its #10054 holding.
  • Jane Street first reported a position in Rhythm Pharmaceuticals in Q2 2018 and has held it in 20 quarters since.
  • Jane Street's Rhythm Pharmaceuticals position peaked at $8.47M in Q4 2023.
  • 239 funds tracked by Wall St. Rank held Rhythm Pharmaceuticals as of Q3 2026.

Based on Jane Street's 13F filing for Q3 2026, filed 12 Nov 2026.