Kersten Dirk 4
4 · Dyne Therapeutics, Inc. · Filed Apr 21, 2026
Research Summary
AI-generated summary of this filing
Dyne Therapeutics (DYN) Director Dirk Kersten Sells Shares
What Happened Dirk Kersten (Director) reported two open-market sales of Dyne Therapeutics (DYN) stock. On 2026-04-17 he (via the reporting entity) sold 211,974 shares for a weighted average price of $20.29 ($4,301,292). On 2026-04-20 he sold 125,274 shares for a weighted average price of $20.07 ($2,513,898). Total proceeds reported: $6,815,190. These were sales (not purchases), and the filing indicates the trades were executed under a pre-established 10b5-1 trading plan.
Key Details
- Transaction dates and amounts:
- 2026-04-17: 211,974 shares sold, weighted avg price $20.29, proceeds $4,301,292 (footnote: prices across $20.00–$20.75).
- 2026-04-20: 125,274 shares sold, weighted avg price $20.07, proceeds $2,513,898.
- Total shares sold: 337,248; total proceeds: $6,815,190.
- The filing was submitted on 2026-04-21 (within the normal Form 4 reporting window), so it is not marked late.
- Ownership/structure notes from the filing:
- The shares sold are held directly by ForDyne B.V., an entity jointly owned by Forbion funds. The filing explains complex institutional ownership and that Kersten is a partner/committee member of the Forbion entities; he disclaims direct beneficial ownership except to the extent of any pecuniary interest.
- Weighted-average prices / ranges: the filing includes weighted-average prices and footnotes offering to provide a per-price breakdown on request.
- No "shares owned after transaction" total was provided in the excerpt you supplied.
Context
- The transactions were executed pursuant to a Rule 10b5-1 trading plan (adopted Nov 11, 2025), which means the sales were preplanned and are commonly treated as routine rather than a real-time signal of insider sentiment.
- These sales were of shares held by an institutional entity (ForDyne/Forbion-related), not necessarily direct personal stock sales; the filing’s footnotes describe delegation of voting/dispositive powers and disclaimers of beneficial ownership.
Insider Transaction Report
Form 4
Kersten Dirk
Director
Transactions
- Sale
Common Stock
[F1][F2][F3][F4]2026-04-17$20.29/sh−211,974$4,301,292→ 4,332,799 total(indirect: See footnote) - Sale
Common Stock
[F1][F5][F3][F4]2026-04-20$20.07/sh−125,274$2,513,898→ 4,207,525 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 $20.75, 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 2,781,155 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 $21.00 to $21.20, 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|2026-04-21