Kersten Dirk 4
4 · Dyne Therapeutics, Inc. · Filed Mar 11, 2026
Research Summary
AI-generated summary of this filing
Dyne Therapeutics (DYN) Director Kersten Dirk Sells Shares
What Happened
- Kersten Dirk, a director of Dyne Therapeutics (DYN), sold a total of 688,788 shares in several open-market disposals on March 9–10, 2026 for aggregate proceeds of approximately $13.15 million. The individual transactions reported: 177,690 shares at a weighted avg $17.72 ($3.15M), 9,482 shares at $18.21 ($172.7K), 219,758 shares at $19.32 ($4.25M), and 281,858 shares at $19.80 ($5.58M). These were sales (not purchases), which are typically routine dispositions rather than a bullish signal.
Key Details
- Transaction dates: March 9, 2026 and March 10, 2026. Form filed on March 11, 2026 (appears timely).
- Aggregate shares sold: 688,788; aggregate proceeds: ~$13,149,314.
- Price details / ranges: reported as weighted averages; per-footnote ranges were $17.50–$18.21, $17.595–$18.59, $18.61–$19.605, and $19.61–$20.03 for the various blocks.
- Footnote: the March 9 sale was made pursuant to a Rule 10b5-1 trading plan adopted by ForDyne B.V. on Nov 11, 2025.
- Ownership notes: the shares are held directly by ForDyne B.V., an entity jointly owned by Forbion funds. Kersten is a partner/committee member in the related management entities and may be deemed to have voting/dispositive power over the shares; he disclaims beneficial ownership except for any pecuniary interest.
- Shares owned after transaction: not specified in the provided excerpt of the filing.
Context
- These are open-market sales by an entity-linked insider and include at least one sale under a pre-established 10b5-1 plan, which typically indicates scheduled disposals rather than trades based on new company information. For retail investors, purchases often signal conviction more than routine sales; this filing documents a sizable institutional-linked liquidation but does not on its own indicate company performance or insider sentiment.
Insider Transaction Report
Form 4
Kersten Dirk
Director
Transactions
- Sale
Common Stock
[F1][F2][F3][F4]2026-03-09$17.72/sh−177,690$3,148,987→ 5,285,156 total(indirect: See footnote) - Sale
Common Stock
[F1][F5][F3][F4]2026-03-10$18.21/sh−9,482$172,687→ 5,275,674 total(indirect: See footnote) - Sale
Common Stock
[F1][F6][F3][F4]2026-03-10$19.32/sh−219,758$4,246,823→ 5,055,916 total(indirect: See footnote) - Sale
Common Stock
[F1][F7][F3][F4]2026-03-10$19.80/sh−281,858$5,580,817→ 4,774,058 total(indirect: See footnote)
Footnotes (7)
- [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 $17.50 to $18.21, 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 3,347,688 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 $17.595 to $18.59, inclusive.
- [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 $18.61 to $19.605, inclusive.
- [F7]The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $19.61 to $20.03, inclusive.
Signature
/s/ Dirk Kersten|2026-03-11