Institutional Ownership
Rhythm Pharmaceuticals Inc
CUSIP 76243J105COMRYTMQ1 2026
Institutional Holders
277
13F filers
Shares Held
67.03M
Aggregate institutional
Institutional Value
$5.67B
Q1 2026
Net New Holders
+6
55 new · 49 closed
Institutional Ownership Trend
Aggregate 13F value by quarter
Multi-quarter trend — upgrade to see history
UpgradePosition Activity
Q1 2026
New positions55
Increased103
Decreased88
Sold out49
Institutional Holders
277 funds hold this security · Q1 2026
| # | Fund | Shares | Value | Δ Shares | Activity |
|---|---|---|---|---|---|
| 1 | Ra Capital Management, L.P. | 6.67M | $579.81M | 0 | Held |
| 2 | Blackrock, Inc. | 6.24M | $542.45M | −60.2K | Reduced |
| 3 | Baker Bros. Advisors LP | 5.60M | $487.42M | 0 | Held |
| 4 | Primecap Management Co/Ca/ | 3.42M | $297.22M | −61.2K | Reduced |
| 5 | Perceptive Advisors LLC | 2.37M | $206.45M | −172.6K | Reduced |
| 6 | State Street Corp | 2.27M | $197.58M | +73.2K | Added |
| 7 | Goldman Sachs Group Inc | 1.97M | $170.93M | +134.6K | Added |
| 8 | Westfield Capital Management Co LP | 1.93M | $167.78M | +662.0K | Added |
| 9 | Fmr LLC | 1.69M | $146.95M | −16.6K | Reduced |
| 10 | Polar Capital Holdings PLC | 1.62M | $140.51M | +430.2K | Added |
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