ARCH Venture Partners XII, LLC has filed 37 insider transactions across 4 companies since September 2023.
Most recent transaction: a disposition of 8313680 shares of Metsera, Inc. ($MTSR) on November 13, 2025.
Activity breakdown: 23 open-market purchases and 0 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov. 13, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Director | D | Common Stock | 8313680 | $0.00 | 0.0000 | 105,376,189 | 100.00% | 7.89% |
| Nov. 13, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Director | D | Common Stock | 18503128 | $0.00 | 0.0000 | 105,376,189 | 100.00% | 17.56% |
| Oct. 27, 2025 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 1915700 | $2.61 | 33,847,838.0000 | 161,978,923 | 6.00% | 1.18% |
| Aug. 1, 2025 | Prime Medicine, Inc. | $PRME | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 3030300 | $3.30 | 18,486,894.0000 | 131,160,842 | 19.61% | 2.31% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | P | Common Stock | 789998 | $18.00 | 8,313,680.0000 | 0 | 10.50% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | C | Series Seed Preferred Stock | 19933333 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | C | Series A Convertible Preferred Stock | 15000000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | C | Series A Convertible Preferred Stock | 15000000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | C | Series B Convertible Preferred Stock | 2678571 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | C | Series B Convertible Preferred Stock | 2678571 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | C | Common Stock | 16006949 | $0.00 | 17,070,904.0000 | 0 | 1504.48% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | C | Common Stock | 7523682 | $0.00 | 7,523,682.0000 | 0 | 9999.99% | 0.00% |
| Feb. 3, 2025 | Metsera, Inc. | $MTSR | ARCH Venture Partners XII, LLC | Not found | P | Common Stock | 1432224 | $18.00 | 18,503,128.0000 | 0 | 8.39% | 0.00% |
| June 10, 2024 | Rapport Therapeutics, Inc. | $RAPP | ARCH Venture Partners XII, LLC | Not found | C | Series B Preferred Stock | 11924138 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| June 10, 2024 | Rapport Therapeutics, Inc. | $RAPP | ARCH Venture Partners XII, LLC | Not found | C | Series A Preferred Stock | 20000000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| June 10, 2024 | Rapport Therapeutics, Inc. | $RAPP | ARCH Venture Partners XII, LLC | Not found | C | Common Stock | 3728738 | $0.00 | 3,728,738.0000 | 0 | 9999.99% | 0.00% |
| Feb. 15, 2024 | Prime Medicine, Inc. | $PRME | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 3200000 | $6.25 | 15,456,594.0000 | 0 | 26.11% | 0.00% |
| Dec. 8, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | J | Common Stock | 1176593 | $0.00 | 31,932,138.0000 | 0 | 3.83% | 0.00% |
| Dec. 8, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | J | Common Stock | 703061 | $0.00 | 31,932,138.0000 | 0 | 2.25% | 0.00% |
| Nov. 13, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 31653 | $11.75 | 4,127,850.0000 | 0 | 0.77% | 0.00% |
| Nov. 14, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 3357 | $11.98 | 4,131,207.0000 | 0 | 0.08% | 0.00% |
| Nov. 8, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 69127 | $10.78 | 4,024,719.0000 | 0 | 1.75% | 0.00% |
| Nov. 8, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 23124 | $11.79 | 4,047,843.0000 | 0 | 0.57% | 0.00% |
| Nov. 9, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 31079 | $10.53 | 4,078,922.0000 | 0 | 0.77% | 0.00% |
| Nov. 10, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 11844 | $11.37 | 4,090,766.0000 | 0 | 0.29% | 0.00% |
| Nov. 10, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 5431 | $11.75 | 4,096,197.0000 | 0 | 0.13% | 0.00% |
| Nov. 3, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 22420 | $11.38 | 3,882,318.0000 | 0 | 0.58% | 0.00% |
| Nov. 6, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 43082 | $11.55 | 3,925,400.0000 | 0 | 1.11% | 0.00% |
| Nov. 7, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 30192 | $11.50 | 3,955,592.0000 | 0 | 0.77% | 0.00% |
| Sept. 28, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 16841 | $13.06 | 3,800,228.0000 | 0 | 0.45% | 0.00% |
| Sept. 28, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 25110 | $13.69 | 3,825,338.0000 | 0 | 0.66% | 0.00% |
| Sept. 29, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 34560 | $13.98 | 3,859,898.0000 | 0 | 0.90% | 0.00% |
| Sept. 26, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 34000 | $11.73 | 3,758,883.0000 | 0 | 0.91% | 0.00% |
| Sept. 27, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 24504 | $12.31 | 3,783,387.0000 | 0 | 0.65% | 0.00% |
| Sept. 22, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 40000 | $11.14 | 3,664,143.0000 | 0 | 1.10% | 0.00% |
| Sept. 25, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 30773 | $10.80 | 3,694,916.0000 | 0 | 0.84% | 0.00% |
| Sept. 25, 2023 | Neumora Therapeutics, Inc. | $NMRA | ARCH Venture Partners XII, LLC | TenPercentOwner | P | Common Stock | 29967 | $11.65 | 3,724,883.0000 | 0 | 0.81% | 0.00% |