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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
2023-03-14 Beskrovnaya Oxana Chief Scientific Officer Sale −1,416 $13.33 $19K 88,729
2023-03-13 McNeill Jonathan See Remarks Sale −1,000 $13.00 $13K 66,600
2023-01-18 McNeill Jonathan See Remarks Option exercise +10,000 $0.73 $7K 77,600
2023-01-18 McNeill Jonathan See Remarks Sale −10,000 $14.03 $140K 67,600
2023-01-18 McNeill Jonathan See Remarks Option exercise · Stock Option (right to buy) −10,000 68,528
2023-01-09 McNeill Jonathan See Remarks Sale −30,150 $11.57 $349K 67,600
2023-01-04 Beskrovnaya Oxana Chief Scientific Officer Option exercise · Stock option (right to buy) 10b5-1 −22,674 30,426
2022-12-12 Rhodes Jason P Director Purchase +934,581 $10.70 $10.0M 934,581
2022-12-12 Atlas Venture Opportunity Fund II, L.P. 10% owner Purchase +934,581 $10.70 $10.0M 934,581
2022-12-12 Scalzo Richard William See Remarks Sale −312 $10.87 $3K 56,183
2022-12-12 McNeill Jonathan See Remarks Sale −472 $10.87 $5K 97,750
2022-12-12 HIGH SUSANNA GATTI Chief Operating Officer Sale −751 $10.87 $8K 112,035
2022-12-12 Farwell Wildon Chief Medical Officer Sale −628 $10.87 $7K 100,096
2022-12-12 Brumm Joshua T See Remarks Sale −3,322 $10.87 $36K 329,801
2022-12-12 Beskrovnaya Oxana Chief Scientific Officer Sale −680 $10.87 $7K 90,145
2022-12-09 Scalzo Richard William See Remarks Grant or award +31,000 56,495
2022-12-09 Scalzo Richard William See Remarks Grant or award · Stock Option (right to buy) +45,000 45,000
2022-12-09 McNeill Jonathan See Remarks Grant or award +40,000 98,222
2022-12-09 McNeill Jonathan See Remarks Grant or award · Stock Option (right to buy) +63,000 63,000
2022-12-09 HIGH SUSANNA GATTI Chief Operating Officer Grant or award +44,000 112,786

Page 32 of 36 · 718 trades