Brian S Posner insider trades

Open-market stock purchases and sales by Brian S Posner, Unknown at Dyne Therapeutics, Inc, from SEC Form 4 filings since Jun 9, 2010.

Track record: 100% of 9 scored buys are up 5% or more since purchase, averaging +59%.

Recent trades

DateStockTradeValue
Jun 8, 2026DYN Dyne Therapeutics, IncBought$33.9K
Jun 5, 2026DYN Dyne Therapeutics, IncBought (not open market)—
Jun 3, 2026ACGL Arch Capital Group LtdSold$59K
Jun 3, 2026DYN Dyne Therapeutics, IncBought$43.7K
May 26, 2026DYN Dyne Therapeutics, IncBought$36.4K
May 20, 2026DYN Dyne Therapeutics, IncBought$42.8K
May 11, 2026ACGL Arch Capital Group LtdSold$34.3K
May 5, 2026ACGL Arch Capital Group LtdBought (not open market)—
Mar 30, 2026DYN Dyne Therapeutics, IncBought$34.2K
Mar 11, 2026ACGL Arch Capital Group LtdSold$51.3K
Mar 11, 2026DYN Dyne Therapeutics, IncBought$38.7K
Mar 6, 2026DYN Dyne Therapeutics, IncBought$45.2K
Oct 1, 2025DYN Dyne Therapeutics, IncBought (not open market)—

Companies traded

  • DYN Dyne Therapeutics, Inc: 7 buys, last Jun 8, 2026
  • ACGL Arch Capital Group Ltd: 12 buys, 4 sales, last Jun 3, 2026
  • BIIB Biogen Inc: 16 sales, last Jul 1, 2021
  • BIVV Bioverativ Inc: 3 buys, last Mar 8, 2018
  • BGMD BG Medicine, Inc: 2 buys, last Jun 3, 2014
  • ANDS Anadys Pharmaceuticals Inc: other filings, last Aug 22, 2011

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