Kersten Dirk 4
4 · Dyne Therapeutics, Inc. · Filed Jun 22, 2026
Research Summary
AI-generated summary of this filing
Dyne Therapeutics (DYN) Director Dirk Kersten Sells Shares
What Happened
- Dirk Kersten, a director of Dyne Therapeutics (DYN), reported sales of a total of 84,355 shares via open-market transactions on June 17 and June 18, 2026. The sales generated approximately $1,695,689 in proceeds (37,454 shares at a $20.14 weighted average = $754,316; 46,901 shares at a $20.07 weighted average = $941,373).
- These were sales (not purchases), which are typically routine disposition activity rather than a bullish signal.
Key Details
- Transaction dates and prices:
- 2026-06-17: 37,454 shares sold at a $20.14 weighted average (individual trades ranged $20.00–$20.43).
- 2026-06-18: 46,901 shares sold at a $20.07 weighted average (individual trades ranged $20.00–$20.485).
- Total proceeds: ~ $1.70 million.
- Shares owned after transaction: Not specified in the provided filing details.
- Notable footnotes:
- Sales were made pursuant to a Rule 10b5-1 trading plan adopted by ForDyne B.V. on November 11, 2025 (footnote F1).
- The reported shares are held directly by ForDyne B.V., an entity jointly owned/managed by Forbion funds; Kersten is a partner of the management entities and is affiliated with ForDyne’s investment committee (footnotes F3–F4). Kersten disclaims direct beneficial ownership except for any pecuniary interest.
- Weighted-average prices reported; the filer offered to provide per-trade price breakdowns on request (footnotes F2, F5).
- Filing timeliness: Form filed on 2026-06-22 for trades on 6/17–6/18. Form 4s are generally due within two business days of a transaction, so this filing was later than that standard window.
Context
- These sales were executed under a pre-established 10b5-1 plan by an entity (ForDyne) tied to institutional investment funds; this is institutional/plan-driven selling rather than a straightforward personal sale by an unaffiliated executive.
- For retail investors: purchases tend to be more informative of insider conviction; routine sales under a trading plan are common and do not alone indicate a change in company outlook.
Insider Transaction Report
Form 4
Kersten Dirk
Director
Transactions
- Sale
Common Stock
[F1][F2][F3][F4]2026-06-17$20.14/sh−37,454$754,316→ 4,159,119 total(indirect: See footnote) - Sale
Common Stock
[F1][F5][F3][F4]2026-06-18$20.07/sh−46,901$941,373→ 4,112,218 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 $20.43, 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 2,685,848 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 $20.00 to $20.485, 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|2026-06-22