RYTM
Rhythm Pharmaceuticals, Inc.Company with tickers: RYTM
CIK
1649904
CUSIP
76243J105
Shares Outstanding
68,532,607
Price History
Institutional Holders
Short Volume
Short Interest
Fails to Deliver
Financials
SEC Filings
Earnings Calls
Insider Trades
Congressional Trades
Holders: 1
Total Value: $10,436
Total Shares: 120
Institutional Ownership Trend
Holder Concentration
Across 1 13F filers · Δ vs Dec 31, 2025Top Holder
100.0%
+90.9 pts
Top 5
100.0%
+62.1 pts
Top 10
100.0%
+46.8 pts
HHI
10,000
Highly concentrated
+9,605
Quarterly Activity
vs Dec 31, 2025
New
0
Increased
0
Decreased
1
Sold Out
276
Unchanged
0
Holder count:
-276
Institutional value:
-100.0%
Shares held:
-100.0%
Top Buyers
vs Dec 31, 2025No qualifying movers this quarter.
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds |
|---|---|---|
| Small Essential Partners LLC | −103 | 120 |
Top New Positions
vs Dec 31, 2025No new positions this quarter.
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) |
|---|---|---|
| Mid RA CAPITAL MANAGEMENT, L.P. | 6,666,837 | $713,618,232 |
| Mega BlackRock, Inc. | 6,297,334 | $674,066,624 |
| Mega VANGUARD GROUP INC | 5,756,430 | $616,168,266 |
| Large BAKER BROS. ADVISORS LP | 5,604,483 | $599,903,860 |
| Mega PRIMECAP MANAGEMENT CO/CA/ | 3,478,669 | $372,356,729 |
| Holder | Value (USD) | % of 13F | Shares | Activity | Type | Discretion | Filed | Action |
|---|---|---|---|---|---|---|---|---|
| Small Essential Partners LLC | $10,436 | 100.00% | 120 | Reduced | Shares | Sole | 2026-05-21 | View |
| No holders match your search. | ||||||||