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DYN · Dyne Therapeutics, Inc.

Healthcare · −6.8% on Oct 16

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Updated Oct 17 · 6 feeds behind: Insider filings, 2 days, and 5 more · Every feed →

On this page

The market view

Price chart

The interactive DYN chart (by TradingView) loads here.

Our take

1 rule fired on DYN

In short: none of these rules has solid or some evidence yet, so they show no clear lean on DYN.

How each did in past tests, against similar stocks over 3 months. Past results don't predict future ones.

The 0–100 score for DYN, and which of these rules are open on it right now
Members see one number for how strongly these rules agree on DYN, and the day each rule fired. Better-tested rules count more, and so do different kinds of filings that point the same way.
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Compare with this company’s history

Is disclosure activity unusual?

See how many different insiders or members of Congress reported purchases or sales of DYN. Each bar covers 28 days, by disclosure date. Several trades by one person count once in each group and period.

Latest period: Sep 22, 2026–Oct 19, 2026 · UTC dates · today is excluded

Insider purchases

Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual.

Latest 28 days
1
Earlier median
0
Earlier range
0–0
Distinct filers per 28 daysScale: 0–1
Oct 21, 2025Oct 19, 2026
Earlier periodsLatest 28 daysEarlier median 0Limited or missing history

Who appears in the latest period?

Up to three filers; one example disclosure each.

Inspect this period’s filings

The history behind this view

First stored company disclosure: Jun 17, 2026. Newest disclosure across this feed: Oct 16, 2026.

Earlier periods in the comparison: 3. Outlined periods are missing data, so they are left out of the comparison. The chart scale changes with the category.

Exact counts, dates and filings for all four categories
Insider purchases · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–0.

Insider purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 20260Partial; excluded
Jun 30, 2026–Jul 27, 20260Within stored history
Jul 28, 2026–Aug 24, 20260Within stored history
Aug 25, 2026–Sep 21, 20260Within stored history
Sep 22, 2026–Oct 19, 2026Latest period1Within stored history
Insider sales · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 3; range: 1–6.

Insider sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 20266Partial; excluded
Jun 30, 2026–Jul 27, 20261Within stored history
Jul 28, 2026–Aug 24, 20266Within stored history
Aug 25, 2026–Sep 21, 20263Within stored history
Sep 22, 2026–Oct 19, 2026Latest period0Within stored history
Congress purchases · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 2026—Unavailable
Jun 30, 2026–Jul 27, 2026—Unavailable
Jul 28, 2026–Aug 24, 2026—Unavailable
Aug 25, 2026–Sep 21, 2026—Unavailable
Sep 22, 2026–Oct 19, 2026Latest period—Unavailable
Congress sales · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 2026—Unavailable
Jun 30, 2026–Jul 27, 2026—Unavailable
Jul 28, 2026–Aug 24, 2026—Unavailable
Aug 25, 2026–Sep 21, 2026—Unavailable
Sep 22, 2026–Oct 19, 2026Latest period—Unavailable
How to read this comparison

The median is the middle count in up to 12 earlier, non-overlapping 28-day periods; the range runs from the smallest to the largest count. The latest period is excluded from both. A comparison needs at least 6 earlier periods, including 3 with activity. The feed’s latest disclosure must be within 7 days of the current period’s end. This freshness check does not verify complete collection.

Insiders include individuals and reporting entities; only purchase and sale codes enter this view. Congress counts reporting members, including their disclosed family transactions. The same filer can appear in purchases and sales, so these categories should not be added into a net count.

These are stored disclosures, not a complete measure of trading. Reporting delays and collection gaps can change the comparison. More activity does not identify a motive or predict a stock’s return.

Company timeline

What has been happening?

May 1, 2026–Oct 16, 2026. Select a month in a category to inspect its records.

Company filings

Insiders

Owners & lobbying

Insiders · Oct 2026

  1. Disclosed
    Brian S Posner · Purchase

    Transaction dated Oct 2, 2026

All 37 records in this snapshot
  1. Disclosed
    Brian S Posner · Purchase

    Transaction dated Oct 2, 2026

  2. Filed
  3. Filed
  4. Filed
  5. Disclosed
    Douglas Kerr · Sale

    Transaction dated Sep 8, 2026

  6. Disclosed
    Douglas Kerr · Sale

    Transaction dated Sep 4, 2026

  7. Disclosed
    Johanna Friedl-Naderer · Sale

    Transaction dated Sep 8, 2026

  8. Disclosed
    Johanna Friedl-Naderer · Sale

    Transaction dated Sep 4, 2026

  9. Disclosed
    John Cox · Sale

    Transaction dated Sep 8, 2026

  10. Filed
  11. Filed
  12. Filed
  13. Disclosed
    Douglas Kerr · Sale

    Transaction dated Aug 13, 2026

  14. Disclosed
    Erick Lucera · Sale

    Transaction dated Aug 13, 2026

  15. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Aug 14, 2026

  16. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Aug 13, 2026

  17. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Aug 13, 2026

  18. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Aug 14, 2026

  19. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Aug 14, 2026

  20. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Aug 13, 2026

  21. Disclosed
    Johanna Friedl-Naderer · Sale

    Transaction dated Aug 13, 2026

  22. Disclosed
    John Cox · Sale

    Transaction dated Aug 13, 2026

  23. Filed
  24. Filed
  25. Filed
  26. Disclosed
    Dirk Kersten · Sale

    Transaction dated Jul 27, 2026

  27. Disclosed
    Dirk Kersten · Sale

    Transaction dated Jul 27, 2026

  28. Filed
  29. Record date
    FDA warning letter ↗

    8-K · mentioned before

  30. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Jul 7, 2026

  31. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Jul 6, 2026

  32. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Jul 7, 2026

  33. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Jul 7, 2026

  34. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Jul 7, 2026

  35. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Jul 7, 2026

  36. Disclosed
    Jason P Rhodes · Sale

    Transaction dated Jul 7, 2026

  37. Filed

Month counts include every record on file. The lists show the newest records on this page. A dash means none on file that month. Trades use disclosure dates; contract dates follow the source record. Nearby events do not establish the cause of a price move.

Who's buying and selling · last 90 days

Congress

No Congress trades on DYN disclosed in the last 90 days.

See every Congress trade on DYN →

Company insiders

1 buy · 9 sells (18 filed lots) · $72.3M sold · $40K bought

  1. ▲ BUYBrian S Posner DirectorDYN Dyne Therapeutics, Inc.$40Kdisclosed Oct 6 · filed 4 days after the trade
  2. ▼ SELLJohanna Friedl-Naderer Chief Commercial OfficerDYN Dyne Therapeutics, Inc.$3.5Kdisclosed Sep 8 · filed the same day
  3. ▼ SELLJohanna Friedl-Naderer Chief Commercial OfficerDYN Dyne Therapeutics, Inc.$21.9Kdisclosed Sep 8 · filed 4 days after the trade
  4. ▼ SELLDouglas Kerr Chief Medical OfficerDYN Dyne Therapeutics, Inc.$24.4Kdisclosed Sep 8 · filed the same day
  5. ▼ SELLJohn Cox CEO & PresidentDYN Dyne Therapeutics, Inc.$107Kdisclosed Sep 8 · filed the same day
  6. ▼ SELLDouglas Kerr Chief Medical OfficerDYN Dyne Therapeutics, Inc.$91.2Kdisclosed Sep 8 · filed 4 days after the trade
  7. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$34Mdisclosed Aug 17 · filed 3 days after the trade
  8. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$2.5Mdisclosed Aug 17 · filed 4 days after the trade
  9. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$7Mdisclosed Aug 17 · filed 4 days after the trade
  10. ▼ SELLJohn Cox CEO & PresidentDYN Dyne Therapeutics, Inc.$131Kdisclosed Aug 17 · filed 4 days after the trade
See every insider trade on DYN →

Filings & events

Company filings (8-K) 76

Events the company must report to the SEC within days — results, deals, departures, restatements.

What it files 8-Ks about

  • Other events · item 8.0115
  • Quarterly or yearly results · item 2.0211
  • Shared information with investors · item 7.019
  • Signed a major agreement · item 1.017
  • Directors or officers joined, left or got new pay · item 5.025
  • Took on new debt · item 2.033

Filing red flags 13

Warning signs in the company's own SEC filings — going-concern doubts, control weaknesses, staff comment letters, late filings, restatements, Wells notices, clinical holds, dividend cuts.

Lobbying 1

Lobbying reports filed with the Senate for the company.

Issues named in the most reports

  • Health Issues 1

Planned insider sales (Form 144) 193

Notices insiders file before they sell certain shares, such as ones they got straight from the company.

13 in the last 90 days · 193 notices on file

The notices on file don't give the sale's size; each sale shows up under company insiders once it is reported.

5% owners (13D / 13G) 3

Investors who reported owning 5% or more — 13D for owners who may push for changes, 13G for owners who just hold.

Push for changes, or just hold?

  • 13D, may push for changes: 0 filings
  • 13G, just holds: 3 filings

Filed by Fmr LLC · T. Rowe Price Investment Management, Inc. · Point72 Asset Management, L.P.

Biggest named funds (13F)

The largest DYN holdings among the well-known funds whose quarterly 13F filings we read — opens here.

Every disclosed trade on DYN

  1. ▲ BUYBrian S Posner DirectorDYN Dyne Therapeutics, Inc.$40Kdisclosed Oct 6 · filed 4 days after the trade
  2. ▼ SELLJohanna Friedl-Naderer Chief Commercial OfficerDYN Dyne Therapeutics, Inc.$3.5Kdisclosed Sep 8 · filed the same day
  3. ▼ SELLJohanna Friedl-Naderer Chief Commercial OfficerDYN Dyne Therapeutics, Inc.$21.9Kdisclosed Sep 8 · filed 4 days after the trade
  4. ▼ SELLDouglas Kerr Chief Medical OfficerDYN Dyne Therapeutics, Inc.$24.4Kdisclosed Sep 8 · filed the same day
  5. ▼ SELLJohn Cox CEO & PresidentDYN Dyne Therapeutics, Inc.$107Kdisclosed Sep 8 · filed the same day
  6. ▼ SELLDouglas Kerr Chief Medical OfficerDYN Dyne Therapeutics, Inc.$91.2Kdisclosed Sep 8 · filed 4 days after the trade
  7. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$34Mdisclosed Aug 17 · filed 3 days after the trade
  8. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$2.5Mdisclosed Aug 17 · filed 4 days after the trade
  9. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$7Mdisclosed Aug 17 · filed 4 days after the trade
  10. ▼ SELLJohn Cox CEO & PresidentDYN Dyne Therapeutics, Inc.$131Kdisclosed Aug 17 · filed 4 days after the trade
  11. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$12Mdisclosed Aug 17 · filed 3 days after the trade
  12. ▼ SELLJohanna Friedl-Naderer Chief Commercial OfficerDYN Dyne Therapeutics, Inc.$5.9Kdisclosed Aug 17 · filed 4 days after the trade
  13. ▼ SELLErick Lucera Chief Financial OfficerDYN Dyne Therapeutics, Inc.$47.2Kdisclosed Aug 17 · filed 4 days after the trade
  14. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$8.1Mdisclosed Aug 17 · filed 3 days after the trade
  15. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$1.7Mdisclosed Aug 17 · filed 4 days after the trade
  16. ▼ SELLDouglas Kerr Chief Medical OfficerDYN Dyne Therapeutics, Inc.$40.9Kdisclosed Aug 17 · filed 4 days after the trade
  17. ▼ SELLDirk Kersten DirectorDYN Dyne Therapeutics, Inc.$6.5Mdisclosed Jul 29 · filed 2 days after the trade
  18. ▼ SELLDirk Kersten DirectorDYN Dyne Therapeutics, Inc.$140Kdisclosed Jul 29 · filed 2 days after the trade
  19. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$118Kdisclosed Jul 8 · filed 1 day after the trade
  20. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$5.8Mdisclosed Jul 8 · filed 2 days after the trade
  21. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$1.1Mdisclosed Jul 8 · filed 1 day after the trade
  22. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$276Kdisclosed Jul 8 · filed 1 day after the trade
  23. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$2.9Mdisclosed Jul 8 · filed 1 day after the trade
  24. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$1.4Mdisclosed Jul 8 · filed 1 day after the trade
  25. ▼ SELLJason P Rhodes DirectorDYN Dyne Therapeutics, Inc.$351Kdisclosed Jul 8 · filed 1 day after the trade
See all 52 trades on DYN →
People & votes

Which members of Congress traded DYN, sponsored bills that touch it and voted on them — opens here.