RYTM Institutional Ownership
Who owns Rhythm Pharmaceuticals, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 305 funds reported holding RYTM at Jun 30, 2026, together owning 112.4% of the company.
- ▲166 buying vs 141 selling
- ▲Held by funds +5.6 pts
- ▲Funds holding +18
- ▼Superinvestors: 1 added, 4 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 305 | 287 | +6.3% |
| In funds' top 10 | 10 | 10 | 0.0% |
| 13F shares | 77.4M | 73.6M | +5.2% |
| Held by funds | 112.4% | 106.9% | +5.6 pts |
| New positions | 61 | 55 | +10.9% |
| Increased | 105 | 102 | +2.9% |
| Reduced | 100 | 88 | +13.6% |
| Sold out | 41 | 54 | −24.1% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in RYTM
All superinvestors →
Who owns RYTM
share of fund held shares- Index and passive funds24.1%
- Active managers and hedge funds63.5%
- Banks and brokers10.9%
- Pensions, insurers and other1.5%
The top 10 holders own 49.2% of all RYTM shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
54 funds changed their position- Capricorn Fund Managers LtdNew+50K sh
- iA Global Asset Management Inc.New+32K sh
- Aspiriant, LLCTrimmed−20K sh
- Creative PlanningAdded+9,682 sh
- Assenagon Asset Management S.A.Trimmed−9,609 sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | RA Capital Management, L.P. | 9.68% | 6.7M | $740M | 0 |
| 2 | BlackRock, Inc. | 8.94% | 6.2M | $684M | −80K |
| 3 | Baker Bros. Advisors LP | 8.14% | 5.6M | $622M | 0 |
| 4 | Primecap Management Co/ca/ | 4.60% | 3.2M | $352M | −249K |
| 5 | Vanguard Portfolio Management LLC | 4.56% | 3.1M | $348M | +96K |
| 6 | Vanguard Capital Management LLC | 4.37% | 3M | $334M | +38K |
| 7 | Jpmorgan Chase & Co | 3.85% | 2.7M | $292M | +1.1M |
| 8 | Perceptive Advisors LLC | 3.76% | 2.6M | $287M | +213K |
| 9 | State Street Corp | 3.74% | 2.6M | $286M | +302K |
| 10 | Price T Rowe Associates Inc /md/ | 3.73% | 2.6M | $285M | +911K |
- Jpmorgan Chase & Co+1.1M sh+$121M
- Price T Rowe Associates Inc /md/+911K sh+$101M
- Norges Bank+686K sh+$76.1M
- Federated Hermes, Inc.+499K sh+$55.4M
- Capital Research Global Investors+417K sh+$46.3M
- Siren, L.L.C.+411K sh+$45.6M
- Morgan Stanley+408K sh+$45.3M
- Assenagon Asset Management S.A.+373K sh+$41.4M
- Fmr LLC−664K sh−$73.7M
- Point72 Asset Management, L.P.−433K sh−$48M
- Adage Capital Partners Gp, L.l.c.−329K sh−$36.5M
- Logos Global Management LP−325K sh−$36.1M
- Driehaus Capital Management LLC−307K sh−$34.1M
- Bank of America Corp /de/−303K sh−$33.7M
- Lord, Abbett & Co. LLC−349K sh−$30.3M
- Primecap Management Co/ca/−249K sh−$27.6M
RYTM institutional ownership FAQ
Who owns the most RYTM stock?
In Q2 2026 13F filings the largest holder of RYTM was RA Capital Management, L.P., followed by BlackRock, Inc. and Baker Bros. Advisors LP. Index fund managers are usually the biggest holders of large companies.
What percentage of RYTM is owned by institutions?
Funds that file 13F reports held 112.4% of RYTM's shares at Jun 30, 2026, compared with 106.9% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying RYTM?
In Q2 2026, 166 funds bought RYTM (61 of them new positions) and 141 sold (41 sold out completely). Among well known investors, 1 added and 4 cut. Our fund sentiment for RYTM is bullish.
What is RYTM's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this RYTM ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.