This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/RYTM/capital-change-brief"
Use Arkolith's capital_change_brief for RYTM. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | $579.8M | 6.7M | —Held | Q1 2026 | |
| 2 | BlackRock, Inc. | $542.4M | 6.2M | ▼−0.9% Reduced · −60K sh | Q1 2026 | |
| 3 | BAKER BROS. ADVISORS LP | $487.4M | 5.6M | —Held | Q1 2026 | |
| 4 | PRIMECAP MANAGEMENT CO/CA/ | $297.2M | 3.4M | ▼−1.8% Reduced · −61K sh | Q1 2026 | |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | $264.5M | 3.0M | ▲New +3.0M sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $258.1M | 3.0M | ▲New +3.0M sh | Q1 2026 | |
| 7 | PERCEPTIVE ADVISORS LLC | $206.4M | 2.4M | ▼−6.8% Reduced · −173K sh | Q1 2026 | |
| 8 | STATE STREET CORP | $197.6M | 2.3M | ▲+3.3% Added · +73K sh | Q1 2026 | |
| 9 | GOLDMAN SACHS GROUP INC | $170.9M | 2.0M | ▲+7.3% Added · +135K sh | Q1 2026 | |
| 10 | WESTFIELD CAPITAL MANAGEMENT CO LP | $167.8M | 1.9M | ▲+52% Added · +662K sh | Q1 2026 | |
| 11 | FMR LLC | $147.0M | 1.7M | ▼−1.0% Reduced · −17K sh | Q1 2026 | |
| 12 | PRICE T ROWE ASSOCIATES INC /MD/ | $143.9M | 1.7M | ▲+6.0% Added · +94K sh | Q1 2026 | |
| 13 | Polar Capital Holdings Plc | $140.5M | 1.6M | ▲+36% Added · +430K sh | Q1 2026 | |
| 14 | JPMORGAN CHASE & CO | $120.0M | 1.6M | ▲+9.1% Added · +130K sh | Q1 2026 | |
| 15 | CITADEL ADVISORS LLC | $123.4M | 1.4M | ▲+825% Added · +1.3M sh | Q1 2026 | |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | $123.2M | 1.4M | ▲+2.9% Added · +41K sh | Q1 2026 | |
| 17 | FEDERATED HERMES, INC. | $111.9M | 1.3M | ▼−21% Reduced · −338K sh | Q1 2026 | |
| 18 | Checkpoint Capital L.P. | $106.7M | 1.2M | ▲+24% Added · +235K sh | Q1 2026 | |
| 19 | JANUS HENDERSON GROUP PLC | $79.9M | 918K | ▼−18% Reduced · −208K sh | Q1 2026 | |
| 20 | ALLIANCEBERNSTEIN L.P. | $97.5M | 910K | ▼−2.1% Reduced · −20K sh | Q1 2026 | |
| 21 | Point72 Asset Management, L.P. | $73.6M | 847K | ▲+97% Added · +417K sh | Q1 2026 | |
| 22 | Woodline Partners LP | $66.0M | 759K | ▲+10% Added · +70K sh | Q1 2026 | |
| 23 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $63.1M | 726K | ▲+17% Added · +104K sh | Q1 2026 | |
| 24 | Siren, L.L.C. | $63.1M | 726K | ▲+45% Added · +226K sh | Q1 2026 | |
| 25 | MORGAN STANLEY | $61.2M | 704K | ▲+8.1% Added · +53K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 1, 2026 | Garfield Alastair | Chief Scientific Officer | Option exercise (M) | 4K | $0 |
| Jul 1, 2026 | Garfield Alastair | Chief Scientific Officer | Tax withholding (F) | 2K | $237K |
| Jul 1, 2026 | Garfield Alastair | Chief Scientific Officer | Option exercise (M) | 4K | — |
| Jun 24, 2026 | TETRAULT LYNN A. | Director | Grant (A) | 2K | $0 |
| Jun 24, 2026 | TETRAULT LYNN A. | Director | Grant (A) | 4K | $0 |
| Jun 24, 2026 | MCGIRR DAVID W J | Director | Grant (A) | 2K | $0 |
| Jun 24, 2026 | MCGIRR DAVID W J | Director | Grant (A) | 4K | $0 |
| Jun 24, 2026 | GOOD JENNIFER L | Director | Grant (A) | 2K | $0 |
| Jun 24, 2026 | GOOD JENNIFER L | Director | Grant (A) | 4K | $0 |
| Jun 24, 2026 | JEAN CHRISTOPHE | Director | Grant (A) | 2K | $0 |
| Jun 24, 2026 | JEAN CHRISTOPHE | Director | Grant (A) | 4K | $0 |
| Jun 24, 2026 | Arbuckle Stuart A | Director | Grant (A) | 2K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| ELI LILLY & COLLY | 90 funds | $11.4B |
| MICROSOFT CORPMSFT | 87 funds | $38.4B |
| NVIDIA CORPNVDA | 86 funds | $61.9B |
| AMAZON.COM INCAMZN | 86 funds | $30.1B |
| ALPHABET INC-CL AGOOGL | 86 funds | $26.3B |
| BROADCOM INCAVGO | 86 funds | $22.9B |
| META PLATFORMS INC-CLASS AMETA | 86 funds | $18.5B |
| INTUITIVE SURGICAL INCISRG | 85 funds | $3.8B |
| BOSTON SCIENTIFIC CORPBSX | 85 funds | $2.7B |
| MICRON TECHNOLOGY INCMU | 84 funds | $9.4B |
| GILEAD SCIENCES INCGILD | 84 funds | $3.4B |
| APPLE INCAAPL | 83 funds | $46.7B |
Ranked by how many of RYTM's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for RYTM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.