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Magnetar Financial’s Rhythm Pharmaceuticals RYTM Stock Holding History

Magnetar Financial’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
Q2 		$434K Buy
+3,908
New +$353K ﹤0.01% 655
2026
Q1 		– Sell
-29,598
Closed -$3.17M – 1366
2025
Q4 		$3.17M Buy
+29,598
New +$3.14M 0.03% 270
2018
Q1 		– Sell
-8,464
Closed -$246K – 772
2017
Q4 		$246K Buy
+8,464
New +$224K ﹤0.01% 566

Other funds holding RYTM

RCM
RA Capital Management Boston, Massachusetts $11.5B AUM 168.77% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
PA
Perceptive Advisors New York $6.66B AUM 360.84% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Magnetar Financial's RYTM Position: Q2 2026 in Review

Magnetar Financial opened a new position in Rhythm Pharmaceuticals (RYTM) in Q2 2026: 3,908 shares worth $434K. The stake represents ﹤0.01% of the portfolio and ranks #655 among its holdings. This is a return to the name: Magnetar Financial previously reported a position in RYTM as recently as Q4 2025.

Magnetar Financial first reported a position in RYTM in Q4 2017 and has held it in 3 quarters since. The position peaked at $3.17M in Q4 2025. 304 funds tracked by Wall St. Rank hold RYTM as of Q2 2026.

  • Magnetar Financial held 3,908 shares of Rhythm Pharmaceuticals worth $434K as of Q2 2026.
  • Rhythm Pharmaceuticals was a new Magnetar Financial position in Q2 2026.
  • Rhythm Pharmaceuticals made up ﹤0.01% of Magnetar Financial's portfolio in Q2 2026, its #655 holding.
  • Magnetar Financial first reported a position in Rhythm Pharmaceuticals in Q4 2017 and has held it in 3 quarters since.
  • Magnetar Financial's Rhythm Pharmaceuticals position peaked at $3.17M in Q4 2025.
  • 304 funds tracked by Wall St. Rank held Rhythm Pharmaceuticals as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.