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Brumm Joshua T insider trades
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Brumm Joshua T insider trades

Brumm Joshua T has filed 25 Form 4s with the SEC that we hold, for Dyne Therapeutics, Inc. (DYN) (CEO & President, Director) and Crescent Biopharma, INC. (CBIO) (Chief Executive Officer, Director). Across all of them we count 0 purchases worth $0 and 34 sales worth $27.6M reported on Form 4. In the last 12 months: 0 purchases ($0) and 3 sales ($920.8K). The largest single trade was a sale of 202,238 shares of Dyne Therapeutics, Inc. worth $5.1M, dated 2024-03-08. Of 2 sales filed since we began reading the 10b5-1 checkbox, 2 (100%) were marked as made under a 10b5-1 trading plan. The first filing on our record is dated 2021-09-22 and the latest 2026-09-18.

Dyne Therapeutics, Inc. (DYN)

CEO & President, Director · 21 filings · 31 purchases and sales
Trade dateCodeSharesValue as filedFiledSource
2021-09-20S, sale reported on Form 43,425$53.5K2021-09-22SEC
2021-09-21S, sale reported on Form 44,584$73.8K2021-09-22SEC
2022-03-11S, sale reported on Form 43,384$29.5K2022-03-14SEC
2022-10-07S, sale reported on Form 414,200$189.9K2022-10-11SEC
2022-10-10S, sale reported on Form 4195,800$2.4M2022-10-11SEC
2022-12-12S, sale reported on Form 43,322$36.1K2022-12-13SEC
2023-03-14S, sale reported on Form 47,318$97.5K2023-03-15SEC
2023-06-08S, sale reported on Form 446,811$615.6K2023-06-12SEC
2023-06-08S, sale reported on Form 414,189$191.1K2023-06-12SEC
2023-06-09S, sale reported on Form 476,582$1.0M2023-06-12SEC
2023-06-12S, sale reported on Form 4187,748$2.4M2023-06-12SEC
2023-09-12S, sale reported on Form 47,672$79.9K2023-09-13SEC
2023-09-18S, sale reported on Form 412,032$113.2K2023-09-20SEC
2023-12-11S, sale reported on Form 47,585$81.3K2023-12-12SEC
2024-01-03S, sale reported on Form 415,382$282.1K2024-01-04SEC
2024-01-03S, sale reported on Form 419,775$376.3K2024-01-04SEC
2024-01-03S, sale reported on Form 416,026$328.5K2024-01-04SEC
2024-01-04S, sale reported on Form 438,301$729.6K2024-01-04SEC
2024-01-04S, sale reported on Form 4180,235$3.3M2024-01-04SEC
2024-02-29S, sale reported on Form 45,520$151.8K2024-03-01SEC
2024-03-01S, sale reported on Form 474,090$2.2M2024-03-01SEC
2024-03-01S, sale reported on Form 418,976$536.1K2024-03-01SEC
2024-03-01S, sale reported on Form 41,414$42.0K2024-03-01SEC
2024-03-07S, sale reported on Form 49,086$234.9K2024-03-11SEC
2024-03-08S, sale reported on Form 4202,238$5.1M2024-03-12SEC
2024-03-08S, sale reported on Form 4160,670$4.3M2024-03-12SEC
2024-03-08S, sale reported on Form 4435$11.9K2024-03-12SEC
2024-03-11S, sale reported on Form 48,618$223.5K2024-03-12SEC
2024-03-11S, sale reported on Form 440,072$1.0M2024-03-12SEC
2024-03-11S, sale reported on Form 49,928$259.1K2024-03-12SEC
2024-03-11S, sale reported on Form 47,769$202.9K2024-03-12SEC

Crescent Biopharma, INC. (CBIO)

Chief Executive Officer, Director · 4 filings · 3 purchases and sales
Trade dateCodeSharesValue as filedFiledSource
2026-06-22S, sale reported on Form 442,305$761.1K2026-06-23SEC
2026-09-16S, sale reported on Form 41,610$28.8K2026-09-18SEC
2026-09-18S, sale reported on Form 47,837$131.0K2026-09-18SEC
Source

Counted from the Form 4 filings this reporting owner (SEC CIK 1528826) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.

Source: U.S. Securities and Exchange Commission (EDGAR) and other official government data · Updated 2026-10-28 · For informational purposes only, not investment advice.
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