Companies / Rhythm Pharmaceuticals, Inc.
Rhythm Pharmaceuticals, Inc.
Financials · FY2025
Ownership
68.9M shares outstanding · as of Aug 1, 2026
Ownership
| Insiders | 0.77% | 533,428 |
| 10%+ / strategic | 14.07% | 9,689,585 |
| Institutions | 92.94% | 63,990,778 |
| Public float | 0.00% | 0 |
Reported holdings exceed shares outstanding — public float shown as 0; some positions may overlap or lag.
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 13
View all →| Insider | % of shares | Shares |
|---|---|---|
Meeker David PCEOPresident and CEO · Director | 0.35% | 239,016 |
Smith Hunter CChief Financial Officer | 0.17% | 116,611 |
Mazabraud YannEVP, Head of International | 0.08% | 53,155 |
Cramer Pamela J.Chief Human Resources Officer | 0.04% | 29,376 |
Lee Jennifer KaydenEVP, Head of North America | 0.03% | 19,233 |
Shulman JosephChief Technical Officer | 0.03% | 18,970 |
Mathers Edward TDirector | 0.02% | 14,168 |
Good Jennifer LDirector | 0.02% | 11,712 |
Jean ChristopheDirector | 0.02% | 11,712 |
McGirr David W JDirector | 0.02% | 11,712 |
Institutional holders 288
View all →| Holder | Value | % of shares |
|---|---|---|
| $683.60M | 8.94% | |
| $664.82M | 9.02% | |
| $579.81M | 9.68% | |
| $487.42M | 8.14% | |
| $372.36M | 5.05% | |
| $311.48M | 4.23% | |
| $285.73M | 3.74% | |
| $206.45M | 3.45% | |
| $195.98M | 2.66% | |
| $182.64M | 2.48% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Westfield Capital Management Company, L.P. 13F manager | Add | — | $57.57M | +662K +52.24% | 1,929,123 2.80% of shares | high |
| Q2 2026 as of | State Street Corporation 13F manager | Add | — | $41.63M | +375K +17.05% | 2,573,529 3.74% of shares | medium |
| Q1 2026 as of | Federated Hermes Inc 13F manager | Trim | — | $-29.36M | -338K -20.79% | 1,286,303 1.87% of shares | medium |
| Q1 2026 as of | Millennium Management LLC 13F manager | Add | — | $23.06M | +265K +141.99% | 451,825 0.66% of shares | medium |
| Q3 2025 as of | Barclays PLC 13F manager | Trim | — | $-21.09M | -209K -59.46% | 142,385 0.21% of shares | medium |
| Q1 2026 as of | Janus Henderson Group PLC 13F manager | Trim | — | $-18.10M | -208K -18.47% | 918,153 1.33% of shares | medium |
| Q4 2025 as of | Norges Bank 13F manager | Trim | — | $-16.83M | -157K -70.37% | 66,213 0.10% of shares | medium |
| Q2 2025 as of | Barclays PLC 13F manager | Add | — | $15.80M | +250K +246.98% | 351,198 0.51% of shares | medium |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
| Vanguard Group Inc | Passive13G/A | — |
| RA Capital Management, L.P. | Passive13G/A | — |
| Primecap Management CO/CA | Passive13G/A | — |
| Perceptive Advisors LLC | Passive13G/A | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| RYTM | — | 76243J105 |