Joshua T. Brumm

Companies

• CRESCENT BIOPHARMA, INC.Board member Jun 23, 2025 to now¹
• CRESCENT BIOPHARMA, INC.Chief executive officer Jun 23, 2025 to now¹
• Dyne Therapeutics, Inc.Chief executive officer Jan 4, 2024 to Mar 12, 2024²
• Dyne Therapeutics, Inc.President Jan 4, 2024 to Mar 12, 2024²
• Dyne Therapeutics, Inc.Board member Sep 16, 2020 to Mar 12, 2024³
• Dyne Therapeutics, Inc.Officer Sep 16, 2020 to Dec 12, 2023³
• Kaleido Biosciences, Inc.Officer Feb 27, 2019 to Mar 4, 2019⁴
• Aravive, Inc.Chief operating officer Jan 31, 2017 to Oct 23, 2017⁵
• Aravive, Inc.Chief financial officer Mar 20, 2014 to Oct 23, 2017⁶
• PharmacyclicsEVP, Finance Aug 13, 2012 to Oct 29, 2012⁷

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• DTDyne Therapeutics, Inc. DYN537,998 shares⁸$8.1M at $14.99Mar 11, 2024
• CBCRESCENT BIOPHARMA, INC. CBIO271,765 shares⁹$3.4M at $12.47Sep 18, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 18, 2026Sold 7,837 shares at $16.71 of CRESCENT BIOPHARMA, INC.⁹
• Sep 16, 2026Sold 1,610 shares at $17.90 of CRESCENT BIOPHARMA, INC.⁹
• Jun 22, 2026Sold 42,305 shares at $17.99 of CRESCENT BIOPHARMA, INC.¹⁰
• Dec 15, 2025Granted 10,000 shares of CRESCENT BIOPHARMA, INC.¹¹
• Dec 15, 2025Granted 45,117 shares of CRESCENT BIOPHARMA, INC.¹¹
• Mar 11, 2024Sold 8,618 shares at $25.93 of Dyne Therapeutics, Inc.⁸
• Mar 11, 2024Sold 7,769 shares at $26.12 of Dyne Therapeutics, Inc.⁸
• Mar 11, 2024Sold 9,928 shares at $26.10 of Dyne Therapeutics, Inc.⁸
• Mar 11, 2024Sold 40,072 shares at $25.42 of Dyne Therapeutics, Inc.⁸
• Mar 11, 2024Exercised options 50,000 shares at $5.54 of Dyne Therapeutics, Inc.⁸
• Mar 8, 2024Sold 435 shares at $27.38 of Dyne Therapeutics, Inc.⁸
• Mar 8, 2024Sold 160,670 shares at $26.72 of Dyne Therapeutics, Inc.⁸
• Mar 8, 2024Sold 202,238 shares at $25.30 of Dyne Therapeutics, Inc.⁸
• Mar 8, 2024Exercised options 209,412 shares at $5.54 of Dyne Therapeutics, Inc.⁸
• Mar 8, 2024Exercised options 153,931 shares at $5.54 of Dyne Therapeutics, Inc.⁸
• Mar 7, 2024Sold 9,086 shares at $25.85 of Dyne Therapeutics, Inc.¹²
• Mar 1, 2024Sold 1,414 shares at $29.70 of Dyne Therapeutics, Inc.¹³
• Mar 1, 2024Sold 74,090 shares at $29.23 of Dyne Therapeutics, Inc.¹³
• Mar 1, 2024Sold 18,976 shares at $28.25 of Dyne Therapeutics, Inc.¹³
• Mar 1, 2024Exercised options 94,480 shares at $5.54 of Dyne Therapeutics, Inc.¹³
• Feb 29, 2024Sold 5,520 shares at $27.50 of Dyne Therapeutics, Inc.¹³
• Feb 29, 2024Exercised options 5,520 shares at $5.54 of Dyne Therapeutics, Inc.¹³
• Jan 29, 2024Gift 1,500 shares of Dyne Therapeutics, Inc.¹⁴
• Jan 29, 2024Gift 20,000 shares of Dyne Therapeutics, Inc.¹⁴
• Jan 4, 2024Sold 38,301 shares at $19.05 of Dyne Therapeutics, Inc.¹⁵