At 5% or more4
Filings28
Latest filing2026-08-14
Dianthus Therapeutics, Inc. has 28 Schedule 13D or 13G filings on record since 2025-08-14. 4 holders' latest filing reports 5% or more of common stock, par value $0.001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Fmr LLC | 15% | 5,970,638 | SCHEDULE 13G/A, 2025-11-05 | 2025-09-30 |
| T. Rowe Price Investment Management, Inc. | 12.1% | 6,632,303 | SCHEDULE 13G/A, 2026-08-07 | 2026-07-31 |
| BlackRock, Inc. | 6.4% | 3,504,166 | SCHEDULE 13G/A, 2026-07-28 | 2026-06-30 |
| Wellington Management Group LLP | 5.9% | 3,229,882 | SCHEDULE 13G, 2026-08-13 | 2026-06-30 |
| Fairmount Funds Management LLC | 4.9% | 2,139,635 | SCHEDULE 13D/A, 2025-11-25 | 2025-11-21 |
| Avidity Partners Management LP | 4.9% | 2,104,184 | SCHEDULE 13D/A, 2025-11-19 | 2025-11-17 |
| RA Capital Management, L.P. | 4.8% | 2,611,733 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Octagon Capital Advisors LP | 3.6% | 1,946,667 | SCHEDULE 13G/A, 2026-05-14 | 2026-03-31 |
| BCLS Fund III Investments, LP | 3.1% | 1,315,892 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Venrock Healthcare Capital Partners III, L.P. | 3.1% | 1,000,000 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
| Sirenia Capital Management LP | 3.1% | 1,696,751 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Vestal Point Capital, LP | 3% | 1,180,000 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Point72 Asset Management, L.P. | 1.2% | 643,599 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Deep Track Capital, LP | 0% | 0 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
Purpose of Transaction (Item 4)
Fairmount Funds Management LLC
Item 4 of the Statement is hereby amended and supplemented as follows: On November 24, 2025, Fund II provided notice to the Company to decrease the Maximum Percentage of the Pre-Funded Warrants from 9.99% to 4.99%, such that the Reporting Persons may only exercise the Pre-Funded Warrants to the extent that after giving effect to such exercise the holders thereof and their affiliates and any persons who are members of a Section 13(d) group with the holders would beneficially own in the aggregate no more than 4.99% of the outstanding Common Stock of the Company. By notice to the Company, the Reporting Persons may increase or decrease the Maximum Percentage to any other percentage not in excess of 19.99%; provided that any such increase will not be effective until the 61st day after such notice is delivered to the Company. The decrease of the Maximum Percentage became effective immediately. The Reporting Persons do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, the Reporting Persons, at any time and from time to time, may review, reconsider and change their position and/or change their purpose and/or develop such plans and may seek to influence management or the board of directors of the Company with respect to the business and affairs of the Company and may from time to time consider pursuing or proposing such matters with advisors, the Company or …The first part of Item 4 of the SCHEDULE 13D/A filed 2025-11-25; the filing has the rest
Avidity Partners Management LP
The Reporting Persons are filing this Amendment No. 3 to report a greater than 1.00% decrease in the percentage of shares of Common Stock beneficially owned by the Reporting Persons due to the sale of shares of Common Stock by private investment funds managed by Avidity Partners Management LP, including Avidity Private Master Fund I LP. Although the Reporting Persons do not have any specific plan or proposal to acquire, transfer or dispose of Common Stock at the time of this filing, consistent with their investment purpose, the Reporting Persons may, either directly or through one or more affiliates, from time to time or at any time and subject to price, market and general economic and fiscal conditions and other factors, acquire or seek to acquire additional shares of Common Stock in the open market, in privately negotiated transactions or otherwise, or dispose of or seek to dispose of all or a portion of such shares of Common Stock now owned or hereafter acquired. The Reporting Persons reserve the right to change their intention with respect to any or all of the matters required to be disclosed in this Item 4. The Reporting Persons have not made a determination regarding a maximum or minimum number of shares of Common Stock or other securities of the Issuer that it may hold at any point in time. Except as set forth herein and below, or as would occur upon completion of any of the matters discussed herein, the Reporting Persons have no present plans or proposals that …The first part of Item 4 of the SCHEDULE 13D/A filed 2025-11-19; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-14 | Vestal Point Capital, LP | 9.95% | SCHEDULE 13G/A |
| 2025-08-14 | Point72 Asset Management, L.P. | 4.5% | SCHEDULE 13G/A |
| 2025-08-14 | BCLS Fund III Investments, LP | 7.5% | SCHEDULE 13G/A |
| 2025-08-14 | Venrock Healthcare Capital Partners III, L.P. | 3.1% | SCHEDULE 13G/A |
| 2025-09-12 | Point72 Asset Management, L.P. | 5.3% | SCHEDULE 13G |
| 2025-09-15 | Fairmount Funds Management LLC | 9.9% | SCHEDULE 13D/A |
| 2025-11-05 | Fmr LLC | 15% | SCHEDULE 13G/A |
| 2025-11-12 | Wellington Management Group LLP | 6.5% | SCHEDULE 13G |
| 2025-11-14 | Vestal Point Capital, LP | 3% | SCHEDULE 13G/A |
| 2025-11-14 | Deep Track Capital, LP | 0% | SCHEDULE 13G/A |
| 2025-11-14 | BCLS Fund III Investments, LP | 3.1% | SCHEDULE 13G/A |
| 2025-11-14 | Octagon Capital Advisors LP | 6.1% | SCHEDULE 13G/A |
| 2025-11-14 | RA Capital Management, L.P. | 9.5% | SCHEDULE 13G/A |
| 2025-11-19 | Avidity Partners Management LP | 4.9% | SCHEDULE 13D/A |
| 2025-11-25 | Fairmount Funds Management LLC | 4.9% | SCHEDULE 13D/A |
| 2026-02-17 | Point72 Asset Management, L.P. | 6.9% | SCHEDULE 13G/A |
| 2026-02-17 | RA Capital Management, L.P. | 6% | SCHEDULE 13G/A |
| 2026-04-27 | BlackRock, Inc. | 5.1% | SCHEDULE 13G |
| 2026-05-14 | Octagon Capital Advisors LP | 3.6% | SCHEDULE 13G/A |
| 2026-05-15 | Wellington Management Group LLP | 4.8% | SCHEDULE 13G/A |
| 2026-05-15 | Sirenia Capital Management LP | 5.3% | SCHEDULE 13G |
| 2026-05-15 | Point72 Asset Management, L.P. | 1.2% | SCHEDULE 13G/A |
| 2026-05-15 | RA Capital Management, L.P. | 4.8% | SCHEDULE 13G/A |
| 2026-07-28 | BlackRock, Inc. | 6.4% | SCHEDULE 13G/A |
| 2026-08-07 | T. Rowe Price Investment Management, Inc. | 7.1% | SCHEDULE 13G |
| 2026-08-07 | T. Rowe Price Investment Management, Inc. | 12.1% | SCHEDULE 13G/A |
| 2026-08-13 | Wellington Management Group LLP | 5.9% | SCHEDULE 13G |
| 2026-08-14 | Sirenia Capital Management LP | 3.1% | SCHEDULE 13G/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.