Rhythm Pharmaceuticals Inc
$89.64+1.3%
+$1.3B
Net Activity
+15.32% total shares
Institutions Holding
308
Popularity Rank
#2070
Avg Weight
0.32%
Total Value
$8.7B
Market Cap
$5.8B
308 institutions currently hold RYTM, with 175 net buyers and 142 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
142
Net Buying Institutions
175
Top 5 by Value
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Across its top 20 institutional holders, RYTM's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 14/100, avg. turnover score 38/100).
RYTM ranks #2070 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
RYTM is a top-conviction position for Checkpoint Capital L.P. — at 33.8% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in RYTM belongs to Ra Capital Management, L.p., but the position matters far more to Checkpoint Capital L.P., who has 33.8% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
GAMMA Investing LLC has added to its RYTM position for two straight quarters, increasing it by $23.6K to reach $46.8K today.
Toth Financial Advisory CORP has trimmed its RYTM position for two straight quarters, cutting it by $127.0K while still holding $742.7K.
RYTM is up 1.3% today, and institutions have been net buyers of $1.3B this quarter — today's price move and the underlying institutional flow are pointing the same direction.
RYTM reported a net loss of $205.3M over the trailing twelve months.
+$1.2B
Total Buy Value
$592.3M
Total Sell Value
175
Net Buyers
142
Net Sellers
RYTM
Q2 2026
Top 5 Institutional Movers
RYTM does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
8
Filings (90d)
$30.55M
Total Est. Value
273K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| David Meeker | 2026-09-14 | $5.24M |
| HUNTER SMITH | 2026-08-31 | $6.73M |
| JOSEPH J SHULMAN | 2026-08-13 | $597K |
| Jennifer Kayden Lee | 2026-08-13 | $8.92M |
| ALASTAIR GARFIELD | 2026-08-13 | $913K |
| YANN MAZABRAUD | 2026-08-12 | $6.43M |
| PAMELA CRAMER | 2026-08-11 | $1.32M |
| PAMELA CRAMER | 2026-08-10 | $407K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
No Schedule 13D/13G filings for this ticker
1
Filings (14d)
Rhythm Pharmaceuticals (ticker: RYTM) announced its Q2 2026 earnings for the quarter ended June 30 on August 4th. This 8-K itself doesn't include any financials — it just says the full press release is furnished as Exhibit 99.1. Under SEC rules, the information here is treated as furnished, not filed, so it isn't a formal regulatory submission.
View Full Filing (SEC EDGAR)76243J105
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,949
Total reported value
$485.2B
Held by 4949 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,868
Total reported value
$1.5T
Held by 4868 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,789
Total reported value
$1.2T
Held by 4789 institutions — one of the most-tracked stocks on AlphaSMO
Access RYTM's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/RYTMCLI
npx alphasmo stocks get RYTM