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Granahan Investment Management’s Rhythm Pharmaceuticals RYTM Stock Holding History

Granahan Investment 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
Q2 		$9.25M Buy
83,270
+5,561
+7% +$503K 0.33% 69
2026
Q1 		$6.76M Buy
77,709
+24,257
+45% +$2.36M 0.33% 74
2025
Q4 		$5.72M Buy
53,452
+3,724
+7% +$395K 0.25% 97
2025
Q3 		$5.02M Buy
49,728
+8,556
+21% +$794K 0.21% 97
2025
Q2 		$2.6M Buy
+41,172
New +$2.52M 0.11% 127

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

Granahan Investment Management's RYTM Position: Q2 2026 in Review

Granahan Investment Management increased its Rhythm Pharmaceuticals (RYTM) stake by 7.2% in Q2 2026, buying an estimated $503K and bringing the position to 83,270 shares worth $9.25M. The position accounts for 0.33% of the portfolio, ranked #69.

Granahan Investment Management first reported a position in RYTM in Q2 2025 and has held it in 5 quarters since. 302 funds tracked by Wall St. Rank hold RYTM as of Q2 2026.

  • Granahan Investment Management held 83,270 shares of Rhythm Pharmaceuticals worth $9.25M as of Q2 2026.
  • Granahan Investment Management bought 5,561 Rhythm Pharmaceuticals shares in Q2 2026, an estimated $503K.
  • Rhythm Pharmaceuticals made up 0.33% of Granahan Investment Management's portfolio in Q2 2026, its #69 holding.
  • Granahan Investment Management first reported a position in Rhythm Pharmaceuticals in Q2 2025 and has held it in 5 quarters since.
  • 302 funds tracked by Wall St. Rank held Rhythm Pharmaceuticals as of Q2 2026.

Based on Granahan Investment Management's 13F filing for Q2 2026, filed 14 Aug 2026.