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CIK 0001818794 · Large accelerated filer

Dyne Therapeutics, Inc.

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Ticker
DYN
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
364883909
Phone
(781) 786-8230
Business address
1560 TRAPELO ROAD, WALTHAM, MA, 02451
Open-market buys, last 90 days
$40,000
in 1 filing
Open-market sales, last 90 days
$247,777
in 3 filings, $248K under 10b5-1 plans

Net −$207,777. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Kerr Douglas −$116K Chief Medical Officer sold 3% of stake
  2. Cox John −$107K CEO & President sold 2% of stake
  3. Posner Brian S +$40K Director 1 filing
  4. Friedl-Naderer Johanna −$25K Chief Commercial Officer sold <1% of stake

Reading 31 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2021-12-10 McNeill Jonathan See Remarks Grant or award +25,311 60,947
2021-12-10 McNeill Jonathan See Remarks Grant or award · Stock Option (right to buy) +37,967 37,967
2021-12-10 HIGH SUSANNA GATTI Chief Operating Officer Grant or award +40,315 73,768
2021-12-10 HIGH SUSANNA GATTI Chief Operating Officer Grant or award · Stock Option (right to buy) +60,472 60,472
2021-12-10 Farwell Wildon Chief Medical Officer Grant or award +22,307 72,307
2021-12-10 Farwell Wildon Chief Medical Officer Grant or award · Stock Option (right to buy) +67,935 67,935
2021-12-10 Brumm Joshua T See Remarks Grant or award +118,190 213,708
2021-12-10 Brumm Joshua T See Remarks Grant or award · Stock Option (right to buy) +177,285 177,285
2021-12-10 Beskrovnaya Oxana Chief Scientific Officer Grant or award +36,524 54,369
2021-12-10 Beskrovnaya Oxana Chief Scientific Officer Grant or award · Stock Option (right to buy) +54,786 54,786
2021-10-01 Brumm Joshua T See Remarks Gift −3,500 95,518
2021-09-23 HIGH SUSANNA GATTI Chief Operating Officer Sale −2,451 $17.22 $42K 33,453
2021-09-21 Scalzo Richard William See Remarks Sale −492 $16.11 $8K 10,606
2021-09-21 McNeill Jonathan See Remarks Sale −729 $16.11 $12K 35,636
2021-09-21 Brumm Joshua T See Remarks Sale −4,584 $16.11 $74K 99,018
2021-09-20 Scalzo Richard William See Remarks Sale −367 $15.61 $6K 11,098
2021-09-20 McNeill Jonathan See Remarks Sale −545 $15.61 $9K 36,365
2021-09-20 Brumm Joshua T See Remarks Sale −3,425 $15.61 $53K 103,602

Page 36 of 36 · 718 trades