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XTX Topco’s Rhythm Pharmaceuticals RYTM Stock Holding History

XTX Topco’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 		$222K Sell
1,996
-57,506
-97% -$5.2M ﹤0.01% 3185
2026
Q1 		$5.17M Buy
59,502
+49,069
+470% +$4.77M 0.09% 270
2025
Q4 		$1.12M Buy
+10,433
New +$1.11M 0.03% 953
2025
Q2 		– Sell
-29,949
Closed -$1.59M – 3053
2025
Q1 		$1.59M Buy
29,949
+22,344
+294% +$1.24M 0.08% 334
2024
Q4 		$426K Buy
+7,605
New +$420K 0.04% 909
2024
Q1 		– Sell
-4,386
Closed -$202K – 2259
2023
Q4 		$202K Buy
+4,386
New +$138K 0.04% 960

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

XTX Topco's RYTM Position: Q2 2026 in Review

XTX Topco reduced its Rhythm Pharmaceuticals (RYTM) stake by 97% in Q2 2026, selling an estimated $5.2M and leaving 1,996 shares worth $222K. The position accounts for ﹤0.01% of the portfolio, ranked #3185.

XTX Topco first reported a position in RYTM in Q4 2023 and has held it in 6 quarters since. The position peaked at $5.17M in Q1 2026. 303 funds tracked by Wall St. Rank hold RYTM as of Q2 2026.

  • XTX Topco held 1,996 shares of Rhythm Pharmaceuticals worth $222K as of Q2 2026.
  • XTX Topco sold 57,506 Rhythm Pharmaceuticals shares in Q2 2026, an estimated $5.2M.
  • Rhythm Pharmaceuticals made up ﹤0.01% of XTX Topco's portfolio in Q2 2026, its #3185 holding.
  • XTX Topco first reported a position in Rhythm Pharmaceuticals in Q4 2023 and has held it in 6 quarters since.
  • XTX Topco's Rhythm Pharmaceuticals position peaked at $5.17M in Q1 2026.
  • 303 funds tracked by Wall St. Rank held Rhythm Pharmaceuticals as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.