Kersten Dirk 4
4 · Dyne Therapeutics, Inc. · Filed Apr 23, 2026
Research Summary
AI-generated summary of this filing
Dyne Therapeutics (DYN) Director Dirk Kersten Sells Shares
What Happened
- Dirk Kersten (listed as a Director and a partner in related Forbion entities) sold a total of 10,952 shares of Dyne Therapeutics in two open-market transactions: 8,300 shares for $166,120 (weighted avg $20.01) on April 21, 2026, and 2,652 shares for $53,049 (weighted avg $20.00) on April 22, 2026. Total proceeds were about $219,169. These were sales (not purchases), and were executed under a pre-established Rule 10b5-1 trading plan.
Key Details
- Transaction dates and prices:
- Apr 21, 2026 — 8,300 shares disposed; weighted avg reported $20.01 (actual sale prices ranged $20.00–$20.08).
- Apr 22, 2026 — 2,652 shares disposed; weighted avg reported $20.00 (actual sale prices ranged $20.00–$20.02).
- Filing: Form 4 filed Apr 23, 2026 (within the standard reporting window for insider trades).
- Holdings/ownership notes: The shares sold were held directly by ForDyne B.V. Footnotes state that ForDyne is jointly owned by Forbion funds and that Kersten is a partner of the management entities and a member of their investment committees. The filing includes amounts for which related managers may be deemed to have voting/dispositive power (e.g., 2,770,203 and 1,426,370 shares referenced); the reporting person disclaims beneficial ownership except for any pecuniary interest.
- Notable footnotes: trades executed pursuant to a Rule 10b5-1 plan (F1); weighted-average prices and price ranges reported with offers to provide per-price details on request (F2, F5); ownership/control details for institutional holders (F3, F4).
Context
- These sales were carried out under a 10b5-1 plan and by an institutional vehicle (ForDyne/Forbion-related entities) rather than a direct personal timing decision; such planned sales are often routine and do not necessarily indicate management sentiment about the company. The filing is informational and factual — it does not state the reason for the sales.
Insider Transaction Report
Form 4
Kersten Dirk
Director
Transactions
- Sale
Common Stock
[F1][F2][F3][F4]2026-04-21$20.01/sh−8,300$166,120→ 4,199,225 total(indirect: See footnote) - Sale
Common Stock
[F1][F5][F3][F4]2026-04-22$20.00/sh−2,652$53,049→ 4,196,573 total(indirect: See footnote)
Footnotes (5)
- [F1]This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by ForDyne B.V. ("ForDyne") on November 11, 2025.
- [F2]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $20.00 to $20.08, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in the footnotes of this Form 4.
- [F3]The shares are held directly by ForDyne. ForDyne is jointly owned by Forbion Capital Fund IV Cooperatief U.A. ("FCF IV") and Forbion Growth Opportunities Fund II Cooperatief U.A. ("FGO II"). Forbion IV Management B.V. ("Forbion Management") may be deemed to have voting and dispositive power over 2,770,203 of the shares of common stock held by ForDyne. Investment decisions with respect to the shares held by ForDyne can be made by FCPM III Services B.V., the director of Forbion Management, which may delegate such powers to its investment committee which may delegate such powers to the authorized representatives of Forbion Management. Messrs. Slootweg, van Osch, Mulder, van Houten, Reithinger and Boorsma (the "Partners") are partners of FCPM III Services B.V., which acts as the investment advisor to the directors of ForDyne. The Reporting Person is a partner of Forbion Management and a member of the investment committee of Forbion Management.
- [F4](Continued) Forbion Growth II Management B.V. ("FGO II Management"), the director of FGO II, may be deemed to have voting and dispositive power over 1,426,370 of the shares of common stock held by ForDyne. Investment decisions with respect to the shares held by ForDyne can be made by FCPM III Services B.V., the director of FGO II Management, which may delegate such powers to its investment committee which may delegate such powers to the authorized representatives of FGO II Management. The Partners are partners of FCPM III Services B.V., which acts as the investment advisor to the directors of ForDyne. The Reporting Person is a partner of FGO II Management and a member of the investment committee of FGO II Management. The Reporting Person disclaims beneficial ownership of the shares, except to the extent of his pecuniary interest therein.
- [F5]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $20.00 to $20.02, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range(s) set forth in the footnotes of this Form 4.
Signature
/s/ Dirk Kersten|2026-04-23