Kersten Dirk 4
4 · Dyne Therapeutics, Inc. · Filed Mar 13, 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), sold 129,672 shares of the company's common stock in open-market transactions on March 11, 2026. The shares were sold for a weighted average price of $19.52 per share, for total proceeds of approximately $2,530,562. The sales were made pursuant to a Rule 10b5-1 trading plan adopted by ForDyne B.V. on November 11, 2025; the reported price is a weighted average of multiple trades that occurred at prices between $18.88 and $19.87.
Key Details
- Transaction date: 2026-03-11; Form 4 filed: 2026-03-13 (filed within the typical 2‑business‑day window).
- Shares sold: 129,672; weighted average price: $19.52; total proceeds: ~$2,530,562.
- Price range across multiple trades: $18.88 to $19.87; the filer will provide per‑price quantities on request (per footnote).
- The shares were held directly by ForDyne B.V.; ForDyne is jointly owned by Forbion funds. Footnotes describe the complex ownership and that the reporting person is a partner in the management entities and disclaims beneficial ownership except for any pecuniary interest.
- Transaction code: S = Sale. This sale was executed under a pre-established 10b5-1 plan (footnote).
Context This was a sale (not a purchase or option exercise) carried out under a 10b5-1 plan, which typically allows scheduled trades by insiders and is often considered routine rather than a direct signal of the insider’s short‑term view. The shares were held and sold by an institutional vehicle (ForDyne B.V.) connected to Forbion-managed funds; the filing notes delegation of voting/dispositive authority among the related management entities.
Insider Transaction Report
- Sale
Common Stock
[F1][F2][F3][F4]2026-03-11$19.52/sh−129,672$2,530,562→ 4,644,386 total(indirect: See footnote)
Footnotes (4)
- [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 $18.88 to $19.87, 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 3,218,016 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.