Dianthus Therapeutics, Inc. (DNTH) ownership: Entities affiliated with Wellington Management Group LLP 8% · institutions 113% (13F 2026-03-31). Insider activity, 90 days: Routine (27 sales, 0 open-market buys). SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| FMR (Fidelity) | 7767686.00 | $651.86M | 13.9% | 2026-03-31 |
| BlackRock | 3175703.00 | $266.50M | 5.7% | 2026-03-31 |
| Vanguard | 2679684.00 | $224.88M | 4.8% | 2026-03-31 |
| RA Capital Management, L.P. | 2611733.00 | $219.18M | 4.7% | 2026-03-31 |
| Wellington Management | 2595783.00 | $217.84M | 4.6% | 2026-03-31 |
| Fairmount Funds Management LLC | 2537191.00 | $212.92M | 4.5% | 2026-03-31 |
| Avidity Partners Management LP | 2104184.00 | $176.58M | 3.8% | 2026-03-31 |
| Octagon Capital Advisors LP | 1946667.00 | $163.36M | 3.5% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-19 | |
| Sell | null | 2026-08-19 | |
| Sell | null | 2026-08-19 | |
| Sell | null | 2026-08-13 | |
| Sell | null | 2026-08-13 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 | |
| Sell | null | 2026-08-10 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.