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Driehaus Capital Management’s Rhythm Pharmaceuticals RYTM Stock Holding History

Driehaus Capital Management’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
Q1 		$38M Sell
436,546
-848,676
-66% -$82.5M 0.28% 126
2025
Q4 		$138M Sell
1,285,222
-98,553
-7% -$10.5M 0.93% 13
2025
Q3 		$140M Buy
1,383,775
+113,823
+9% +$10.6M 1% 10
2025
Q2 		$80.2M Sell
1,269,952
-188,070
-13% -$11.5M 0.64% 39
2025
Q1 		$77.2M Buy
1,458,022
+167,047
+13% +$9.27M 0.74% 32
2024
Q4 		$72.3M Sell
1,290,975
-8,515
-0.7% -$470K 0.6% 38
2024
Q3 		$68.1M Buy
1,299,490
+117,120
+10% +$5.61M 0.58% 46
2024
Q2 		$48.5M Buy
1,182,370
+326,865
+38% +$13M 0.47% 66
2024
Q1 		$37.1M Buy
855,505
+256,600
+43% +$11.2M 0.37% 78
2023
Q4 		$27.5M Buy
598,905
+324,381
+118% +$10.2M 0.33% 97
2023
Q3 		$6.29M Buy
274,524
+251,531
+1,094% +$5.63M 0.08% 267
2023
Q2 		$379K Hold
22,993
– – ﹤0.01% 351
2023
Q1 		$410K Hold
22,993
– – 0.01% 343
2022
Q4 		$670K Hold
22,993
– – 0.01% 308
2022
Q3 		$563K Buy
+22,993
New +$428K 0.01% 313

Other funds holding RYTM

RCM
RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PA
Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return

Driehaus Capital Management's RYTM Position: Q1 2026 in Review

Driehaus Capital Management reduced its Rhythm Pharmaceuticals (RYTM) stake by 66% in Q1 2026, selling an estimated $82.5M and leaving 436,546 shares worth $38M. The position accounts for 0.28% of the portfolio, ranked #126.

Driehaus Capital Management first reported a position in RYTM in Q3 2022 and has held it in 15 quarters since. The position peaked at $140M in Q3 2025. 285 funds tracked by Wall St. Rank hold RYTM as of Q1 2026.

  • Driehaus Capital Management held 436,546 shares of Rhythm Pharmaceuticals worth $38M as of Q1 2026.
  • Driehaus Capital Management sold 848,676 Rhythm Pharmaceuticals shares in Q1 2026, an estimated $82.5M.
  • Rhythm Pharmaceuticals made up 0.28% of Driehaus Capital Management's portfolio in Q1 2026, its #126 holding.
  • Driehaus Capital Management first reported a position in Rhythm Pharmaceuticals in Q3 2022 and has held it in 15 quarters since.
  • Driehaus Capital Management's Rhythm Pharmaceuticals position peaked at $140M in Q3 2025.
  • 285 funds tracked by Wall St. Rank held Rhythm Pharmaceuticals as of Q1 2026.

Based on Driehaus Capital Management's 13F filing for Q1 2026, filed 15 May 2026.