Insider trades › Dirk Kersten
Dirk Kersten
A corporate insider: an officer, director or owner of more than 10% of a company. Insiders report their trades to the SEC on Form 4The form insiders use to report each purchase or sale of their company's stock. It is due within two business days of the trade. · Last filing Jul 29, 2026
Ask your AI about this
Connect Claude, ChatGPT, Gemini or Grok (Microsoft 365 Copilot coming soon) to 13F.ai and ask in plain English. Copy a question to get started:
Using 13F.ai, list Dirk Kersten's open-market buys and sells across companies in the last two years, with the Form 4 links.
Using 13F.ai, how did the stocks Dirk Kersten bought perform after the purchase compared with the S&P 500?
Using 13F.ai, are other insiders at the same companies buying or selling at the same time as Dirk Kersten?
Connect your AI · Plans and the 7-day free trial (card required)
Buying and selling by quarter
Dollars bought and sold on the open market over the last two years.
Bought Sold
By trade date, using the shares and price reported for each trade. Stock grants, option exercises and shares withheld for tax are left out.
Roles
The companies where this person reports as an insider, and their position at each, most recent first.
| Company | Role | Last filed |
|---|---|---|
| DYN Dyne Therapeutics, Inc. | Director | Jul 29, 2026 |
Roles come from the filings themselves and can change over time.
Latest open-market trades
Purchases and sales at every company, most recent filing first.
| How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss. | Filing | ||||||
|---|---|---|---|---|---|---|---|
| Jul 27, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 256,072 | $25.50 | $6.5M | -35.1% | Form 4 ↗ |
| Jul 27, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 5,388 | $26.04 | $140.3K | -35.1% | Form 4 ↗ |
| Jun 23, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 1,657 | $21.47 | $35.6K | -18.1% | Form 4 ↗ |
| Jun 23, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 71,629 | $21.04 | $1.5M | -18.1% | Form 4 ↗ |
| Jun 22, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 190,676 | $20.57 | $3.9M | -19.1% | Form 4 ↗ |
| Jun 18, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 46,901 | $20.07 | $941.3K | -14.4% | Form 4 ↗ |
| Jun 17, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 37,454 | $20.14 | $754.3K | -12.4% | Form 4 ↗ |
| Apr 22, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 2,652 | $20.00 | $53.0K | -18.8% | Form 4 ↗ |
| Apr 21, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 8,300 | $20.01 | $166.1K | -17.8% | Form 4 ↗ |
| Apr 20, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 125,274 | $20.07 | $2.5M | -20.7% | Form 4 ↗ |
| Apr 17, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 211,974 | $20.29 | $4.3M | -22.2% | Form 4 ↗ |
| Apr 16, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 11,116 | $21.10 | $234.5K | -21.3% | Form 4 ↗ |
| Apr 16, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 6,657 | $20.06 | $133.5K | -21.3% | Form 4 ↗ |
| Apr 15, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 81,840 | $20.27 | $1.7M | -21.9% | Form 4 ↗ |
| Mar 11, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 129,672 | $19.52 | $2.5M | -25.7% | Form 4 ↗ |
| Mar 10, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 9,482 | $18.21 | $172.7K | -24.6% | Form 4 ↗ |
| Mar 10, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 219,758 | $19.33 | $4.2M | -24.6% | Form 4 ↗ |
| Mar 10, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 281,858 | $19.80 | $5.6M | -24.6% | Form 4 ↗ |
| Mar 9, 2026 | DYN Dyne Therapeutics, Inc. | Sale | 177,690 | $17.72 | $3.1M | -14.2% | Form 4 ↗ |
| Dec 9, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 34,437 | $29.18 | $1.0M | -64.9% | Form 4 ↗ |
| Dec 6, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 101,675 | $29.34 | $3.0M | -65.9% | Form 4 ↗ |
| Dec 5, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 3,806 | $29.05 | $110.6K | -62.5% | Form 4 ↗ |
| Dec 4, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 135,039 | $29.39 | $4.0M | -65.9% | Form 4 ↗ |
| Dec 3, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 29,732 | $29.05 | $863.7K | -64.0% | Form 4 ↗ |
| Dec 2, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 1,228 | $30.37 | $37.3K | -66.4% | Form 4 ↗ |
| Dec 2, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 79,973 | $29.66 | $2.4M | -66.4% | Form 4 ↗ |
| Nov 14, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 8,929 | $32.82 | $293.0K | -70.5% | Form 4 ↗ |
| Nov 13, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 10,803 | $35.24 | $380.7K | -76.0% | Form 4 ↗ |
| Oct 21, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 121 | $35.06 | $4,242 | -78.0% | Form 4 ↗ |
| Oct 18, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 13,414 | $35.16 | $471.6K | -80.3% | Form 4 ↗ |
| Oct 17, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 13,013 | $35.17 | $457.7K | -80.1% | Form 4 ↗ |
| Oct 16, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 23,671 | $35.35 | $836.8K | -81.1% | Form 4 ↗ |
| Oct 3, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 5,441 | $35.13 | $191.1K | -81.7% | Form 4 ↗ |
| Oct 2, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 21,518 | $35.38 | $761.3K | -84.3% | Form 4 ↗ |
| Oct 1, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 8,423 | $35.16 | $296.2K | -83.3% | Form 4 ↗ |
| Sep 30, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 29,007 | $35.47 | $1.0M | -83.7% | Form 4 ↗ |
| Sep 30, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 1,935 | $36.02 | $69.7K | -83.7% | Form 4 ↗ |
| Sep 27, 2024 | DYN Dyne Therapeutics, Inc. | Sale | 32 | $35.00 | $1,120 | -81.3% | Form 4 ↗ |
Each row links to its Form 4. Since trade compares the stock’s move from the close on the trade date (or the next trading day) to its latest close with the S&P 500 over the same days, adjusted for splits and excluding dividends. It describes the stock, not what the trader made: we don’t know their purchase price, position size or later sales. A dash means the trade isn’t matched to a listed stock, or there is no closing price after it yet.
When several people report on the same filing, we list it under the first one named, so trades by someone usually listed second may be missing here. Information, not investment advice: see the disclaimer.