Spignesi Robert G. Jr., President and CEO of Rapid Micro Biosystems, Inc. ($RPID), sold shares on the open market eight times in the last 365 days for a total of $467 thousand. His most recent sale occurred on March 10, 2026. These sales rank 6,611th among 11,678 individual insiders, below the average of $8.6 million per seller and 6.4 transactions. He made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 10, 2026 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 17922 | $4.11 | 1,169,848.0000 | 44,956,131 | 1.51% | 0.04% |
| Feb. 19, 2026 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 38327 | $3.89 | 1,187,770.0000 | 44,956,131 | 3.13% | 0.09% |
| Feb. 11, 2026 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Class A Common Stock | 264000 | $0.00 | 1,226,097.0000 | 44,956,131 | 27.44% | 0.59% |
| Feb. 11, 2026 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Stock Option (Right to Buy) | 528000 | $0.00 | 528,000.0000 | 44,956,131 | 9999.99% | 1.17% |
| Feb. 9, 2026 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 12840 | $3.78 | 962,097.0000 | 44,956,131 | 1.32% | 0.03% |
| Oct. 17, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | F | Class A Common Stock | 4774 | $3.08 | 974,937.0000 | 44,956,131 | 0.49% | 0.01% |
| Oct. 17, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | F | Class A Common Stock | 2072 | $3.08 | 971,878.0000 | 44,956,131 | 0.21% | 0.00% |
| Oct. 17, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Class A Common Stock | 3400 | $0.75 | 973,950.0000 | 44,956,131 | 0.35% | 0.01% |
| Oct. 17, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Stock Option (Right to Buy) | 7833 | $0.00 | 0.0000 | 44,956,131 | 100.00% | 0.02% |
| Oct. 17, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Stock Option (Right to Buy) | 3400 | $0.00 | 0.0000 | 44,956,131 | 100.00% | 0.01% |
| Oct. 17, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Class A Common Stock | 7833 | $0.75 | 979,711.0000 | 44,956,131 | 0.81% | 0.02% |
| July 11, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Class A Common Stock | 25145 | $0.00 | 969,160.0000 | 43,575,705 | 2.66% | 0.06% |
| July 11, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 11874 | $3.33 | 957,286.0000 | 43,575,705 | 1.23% | 0.03% |
| July 14, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 11881 | $3.32 | 970,550.0000 | 43,575,705 | 1.21% | 0.03% |
| July 14, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Class A Common Stock | 25145 | $0.00 | 982,431.0000 | 43,575,705 | 2.63% | 0.06% |
| July 8, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 10824 | $3.51 | 886,686.0000 | 43,575,705 | 1.21% | 0.02% |
| July 9, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Class A Common Stock | 25144 | $0.00 | 911,830.0000 | 43,575,705 | 2.84% | 0.06% |
| July 9, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 11247 | $3.51 | 900,583.0000 | 43,575,705 | 1.23% | 0.03% |
| July 10, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Class A Common Stock | 25145 | $0.00 | 925,728.0000 | 43,575,705 | 2.79% | 0.06% |
| July 10, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | S | Class A Common Stock | 11617 | $3.40 | 944,015.0000 | 43,575,705 | 1.22% | 0.03% |
| July 8, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | M | Class A Common Stock | 25144 | $0.00 | 897,510.0000 | 43,575,705 | 2.88% | 0.06% |
| March 9, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | F | Class A Common Stock | 10650 | $2.39 | 872,366.0000 | 43,575,705 | 1.21% | 0.02% |
| Feb. 18, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Stock Option (Right to Buy) | 290000 | $0.00 | 290,000.0000 | 43,575,705 | 9999.99% | 0.67% |
| Feb. 18, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Class A Common Stock | 365000 | $0.00 | 883,016.0000 | 43,575,705 | 70.46% | 0.84% |
| Feb. 11, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | F | Class A Common Stock | 10755 | $2.68 | 516,205.0000 | 43,575,705 | 2.04% | 0.02% |
| Feb. 6, 2025 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | F | Class A Common Stock | 13052 | $3.10 | 526,960.0000 | 43,575,705 | 2.42% | 0.03% |
| Aug. 6, 2024 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 50000 | $0.77 | 540,012.0000 | 43,024,039 | 10.20% | 0.12% |
| March 11, 2024 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | F | Class A Common Stock | 10323 | $0.98 | 468,824.0000 | 43,024,039 | 2.15% | 0.02% |
| Feb. 12, 2024 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | F | Class A Common Stock | 9365 | $0.96 | 479,147.0000 | 43,024,039 | 1.92% | 0.02% |
| Feb. 6, 2024 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Stock Option (Right to Buy) | 225000 | $0.00 | 225,000.0000 | 43,024,039 | 9999.99% | 0.52% |
| Feb. 6, 2024 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Class A Common Stock | 113000 | $0.00 | 488,512.0000 | 43,024,039 | 30.09% | 0.26% |
| Aug. 15, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 20000 | $0.97 | 375,512.0000 | 0 | 5.63% | 0.00% |
| Aug. 8, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 34000 | $0.92 | 355,512.0000 | 0 | 10.58% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 100 | $0.92 | 314,273.0000 | 0 | 0.03% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 100 | $0.92 | 314,373.0000 | 0 | 0.03% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 100 | $0.93 | 314,473.0000 | 0 | 0.03% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 300 | $0.93 | 321,512.0000 | 0 | 0.09% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 200 | $0.89 | 294,973.0000 | 0 | 0.07% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 100 | $0.90 | 295,073.0000 | 0 | 0.03% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 3000 | $0.91 | 298,073.0000 | 0 | 1.02% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 14700 | $0.91 | 312,773.0000 | 0 | 4.93% | 0.00% |
| May 17, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | P | Class A Common Stock | 1400 | $0.92 | 314,173.0000 | 0 | 0.45% | 0.00% |
| March 9, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Stock Option (Right to Buy) | 217700 | $0.00 | 217,700.0000 | 0 | 9999.99% | 0.00% |
| March 9, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | PRESIDENT AND CEO | A | Class A Common Stock | 108850 | $0.00 | 294,773.0000 | 0 | 58.55% | 0.00% |
| Feb. 13, 2023 | RAPID MICRO BIOSYSTEMS, INC. | $RPID | Spignesi Robert G. Jr. | President and CEO | F | Class A Common Stock | 11406 | $1.30 | 185,923.0000 | 0 | 5.78% | 0.00% |