Brumm Joshua T has filed 58 insider transactions across 2 companies since March 2023.
Most recent transaction: a grant/award of 45117 shares of CRESCENT BIOPHARMA, INC. ($CBIO) on December 15, 2025.
Activity breakdown: 0 open-market purchases and 25 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 15, 2025 | CRESCENT BIOPHARMA, INC. | $CBIO | Brumm Joshua T | Chief Executive Officer | A | Ordinary Shares | 45117 | $0.00 | 313,517.0000 | 13,892,516 | 16.81% | 0.32% |
| Dec. 15, 2025 | CRESCENT BIOPHARMA, INC. | $CBIO | Brumm Joshua T | Chief Executive Officer | A | Stock Option (Right to Buy) | 180467 | $0.00 | 180,467.0000 | 13,892,516 | 9999.99% | 1.30% |
| Dec. 15, 2025 | CRESCENT BIOPHARMA, INC. | $CBIO | Brumm Joshua T | Chief Executive Officer | A | Ordinary Shares | 10000 | $0.00 | 323,517.0000 | 13,892,516 | 3.19% | 0.07% |
| Dec. 8, 2025 | CRESCENT BIOPHARMA, INC. | $CBIO | Brumm Joshua T | Chief Executive Officer | A | Stock Option (Right to Buy) | 345672 | $0.00 | 345,672.0000 | 13,892,516 | 9999.99% | 2.49% |
| March 11, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 7769 | $26.12 | 546,616.0000 | 0 | 1.40% | 0.00% |
| March 11, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 8618 | $25.93 | 537,998.0000 | 0 | 1.58% | 0.00% |
| March 8, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 153931 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| March 8, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 209412 | $0.00 | 133,269.0000 | 0 | 61.11% | 0.00% |
| March 11, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 50000 | $0.00 | 83,269.0000 | 0 | 37.52% | 0.00% |
| March 8, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 153931 | $5.54 | 708,316.0000 | 0 | 27.77% | 0.00% |
| March 11, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 50000 | $5.54 | 604,385.0000 | 0 | 9.02% | 0.00% |
| March 11, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 40072 | $25.42 | 564,313.0000 | 0 | 6.63% | 0.00% |
| March 11, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 9928 | $26.10 | 554,385.0000 | 0 | 1.76% | 0.00% |
| March 8, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 209412 | $5.54 | 917,728.0000 | 0 | 29.56% | 0.00% |
| March 8, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 202238 | $25.30 | 715,490.0000 | 0 | 22.04% | 0.00% |
| March 8, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 160670 | $26.72 | 554,820.0000 | 0 | 22.46% | 0.00% |
| March 8, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 435 | $27.38 | 554,385.0000 | 0 | 0.08% | 0.00% |
| March 7, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 9086 | $25.85 | 554,385.0000 | 0 | 1.61% | 0.00% |
| March 1, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 74090 | $29.23 | 564,885.0000 | 0 | 11.60% | 0.00% |
| March 1, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 1414 | $29.70 | 563,471.0000 | 0 | 0.25% | 0.00% |
| Feb. 29, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 5520 | $0.00 | 102,343.0000 | 0 | 5.12% | 0.00% |
| March 1, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 57843 | $0.00 | 44,500.0000 | 0 | 56.52% | 0.00% |
| March 1, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 36637 | $0.00 | 342,681.0000 | 0 | 9.66% | 0.00% |
| March 1, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 18976 | $28.25 | 638,975.0000 | 0 | 2.88% | 0.00% |
| Feb. 29, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 5520 | $27.50 | 563,471.0000 | 0 | 0.97% | 0.00% |
| March 1, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 94480 | $5.54 | 657,951.0000 | 0 | 16.77% | 0.00% |
| Feb. 29, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 5520 | $5.54 | 568,991.0000 | 0 | 0.98% | 0.00% |
| Jan. 29, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | G | Common Stock | 1500 | $0.00 | 563,471.0000 | 0 | 0.27% | 0.00% |
| Jan. 29, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | G | Common Stock | 20000 | $0.00 | 564,971.0000 | 0 | 3.42% | 0.00% |
| Jan. 4, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 18536 | $1.03 | 603,507.0000 | 0 | 3.17% | 0.00% |
| Jan. 3, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 51183 | $1.03 | 636,154.0000 | 0 | 8.75% | 0.00% |
| Jan. 3, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 15382 | $18.34 | 620,772.0000 | 0 | 2.42% | 0.00% |
| Jan. 3, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 19775 | $19.03 | 600,997.0000 | 0 | 3.19% | 0.00% |
| Jan. 3, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 16026 | $20.50 | 584,971.0000 | 0 | 2.67% | 0.00% |
| Jan. 4, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Common Stock | 200000 | $5.54 | 803,507.0000 | 0 | 33.14% | 0.00% |
| Jan. 4, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 180235 | $18.40 | 623,272.0000 | 0 | 22.43% | 0.00% |
| Jan. 4, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | S | Common Stock | 38301 | $19.05 | 584,971.0000 | 0 | 6.15% | 0.00% |
| Jan. 3, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 51183 | $0.00 | 18,536.0000 | 0 | 73.41% | 0.00% |
| Jan. 4, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 18536 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Jan. 4, 2024 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | CEO & President | M | Stock option (right to buy) | 200000 | $0.00 | 107,863.0000 | 0 | 64.96% | 0.00% |
| Dec. 11, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 7585 | $10.72 | 584,971.0000 | 0 | 1.28% | 0.00% |
| Nov. 15, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | A | Common Stock | 358877 | $0.00 | 592,556.0000 | 0 | 153.58% | 0.00% |
| Nov. 15, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | A | Stock Option (right to buy) | 139750 | $0.00 | 139,750.0000 | 0 | 9999.99% | 0.00% |
| Sept. 18, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 12032 | $9.41 | 233,679.0000 | 0 | 4.90% | 0.00% |
| Sept. 12, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 7672 | $10.41 | 245,711.0000 | 0 | 3.03% | 0.00% |
| June 8, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | G | Common Stock | 20000 | $0.00 | 302,483.0000 | 0 | 6.20% | 0.00% |
| June 9, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | M | Common Stock | 76582 | $1.03 | 346,353.0000 | 0 | 28.39% | 0.00% |
| June 9, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 76582 | $13.34 | 269,771.0000 | 0 | 22.11% | 0.00% |
| June 12, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | M | Common Stock | 171360 | $1.03 | 441,131.0000 | 0 | 63.52% | 0.00% |
| June 12, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 187748 | $12.61 | 253,383.0000 | 0 | 42.56% | 0.00% |
| June 8, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | M | Stock Option (right to buy) | 30088 | $0.00 | 317,661.0000 | 0 | 8.65% | 0.00% |
| June 9, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | M | Stock Option (right to buy) | 76582 | $0.00 | 241,079.0000 | 0 | 24.11% | 0.00% |
| June 12, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | M | Stock Option (right to buy) | 171360 | $0.00 | 69,719.0000 | 0 | 71.08% | 0.00% |
| June 8, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 14189 | $13.47 | 269,771.0000 | 0 | 5.00% | 0.00% |
| June 8, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 46811 | $13.15 | 283,960.0000 | 0 | 14.15% | 0.00% |
| June 8, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | M | Common Stock | 30088 | $1.03 | 330,771.0000 | 0 | 10.01% | 0.00% |
| June 8, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | G | Common Stock | 1800 | $0.00 | 300,683.0000 | 0 | 0.60% | 0.00% |
| March 14, 2023 | Dyne Therapeutics, Inc. | $DYN | Brumm Joshua T | See Remarks | S | Common Stock | 7318 | $13.33 | 322,483.0000 | 0 | 2.22% | 0.00% |