Kersten Dirk 4
4 · Dyne Therapeutics, Inc. · Filed Jun 24, 2026
Research Summary
AI-generated summary of this filing
Dyne Therapeutics (DYN) Director Kersten Dirk Sells Shares
What Happened Kersten Dirk, identified as a director, disposed of 263,962 shares of Dyne Therapeutics (DYN) in sales executed June 22–23, 2026, netting approximately $5,464,612. The sales were reported on a Form 4 filed June 24, 2026, and were executed under a Rule 10b5‑1 trading plan adopted by ForDyne B.V.
Key Details
- Transaction dates and reported weighted-average prices:
- 2026-06-22: 190,676 shares sold at a weighted avg price of $20.57 (range $20.13–$20.97). (Footnote F2)
- 2026-06-23: 71,629 shares sold at a weighted avg price of $21.04 (range $20.45–$21.44). (Footnote F5)
- 2026-06-23: 1,657 shares sold at a weighted avg price of $21.47 (range $21.45–$21.495). (Footnote F6)
- Total: 263,962 shares sold for about $5.46 million.
- Shares were held directly by ForDyne B.V.; the filing discloses complex institutional ownership and that Kersten is a partner/committee member in entities (Forbion-related) that may have voting/dispositive power over those shares (Footnotes F3–F4). The Reporting Person disclaims beneficial ownership except to the extent of any pecuniary interest.
- The sales were made pursuant to a Rule 10b5‑1 trading plan adopted Nov 11, 2025 (Footnote F1).
- Form 4 filed 2026-06-24 — reporting appears timely based on the transaction dates. The filing offers to provide per-price breakdowns on request (per weighted-average footnotes).
Context These are sales (S) — typically considered routine when executed under a pre-established 10b5‑1 plan and when shares are held by an institutional entity. The filing indicates the shares were sold by ForDyne (an entity jointly owned by Forbion funds) and that Kersten has roles in the management/advisory structure; this points to institutional-level disposition rather than a simple individual open‑market trade. No post-transaction shareholdings were provided in the excerpt.
Insider Transaction Report
Form 4
Kersten Dirk
Director
Transactions
- Sale
Common Stock
[F1][F2][F3][F4]2026-06-22$20.57/sh−190,676$3,922,263→ 3,921,542 total(indirect: See footnote) - Sale
Common Stock
[F1][F5][F3][F4]2026-06-23$21.04/sh−71,629$1,506,766→ 3,849,913 total(indirect: See footnote) - Sale
Common Stock
[F1][F6][F3][F4]2026-06-23$21.47/sh−1,657$35,583→ 3,848,256 total(indirect: See footnote)
Footnotes (6)
- [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 $20.13 to $20.97, 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 2,421,886 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 from Footnote 2) 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 $20.45 to $21.44, 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.
- [F6]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $21.45 to $21.495, 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|2026-06-24