| Investor | Value | Of portfolio | Shares | Change | Quarter |
|---|---|---|---|---|---|
| Renaissance Technologies | $366.9K | 0.00% | 212.10K | +68% | Q2 2026 |
From each investor's quarterly 13F filing with the SEC: positions at the quarter's end, reported up to 45 days later. All investors
No member of Congress has disclosed a RPID trade since 2025.
From House and Senate STOCK Act reports. Members disclose trades, not holdings, as value ranges up to 45 days later, so amounts are estimates and “last move” is a hint at who still holds it, not a position. All recent congress trades
| Date | Insider | Transaction | Shares | Value |
|---|---|---|---|---|
| Jul 23, 2026 | Kollender Richard SDirector | Conversion of Exercise of derivative security at price 0.75 per share. | 3.5K | $2.63K |
| Jul 21, 2026 | Spignesi Robert G JrChief Executive Officer | Conversion of Exercise of derivative security at price 0.75 per share. | 1.4K | $1.05K |
| May 28, 2026 | Lowenstein IneseDirector | Stock Award(Grant) at price 1.96 per share. | 12.8K | $25.00K |
| May 28, 2026 | Wirtjes Sean M. CpaChief Financial Officer | Stock Award(Grant) at price 1.96 per share. | 12.8K | $25.00K |
| May 28, 2026 | Malloy KirkDirector | Stock Award(Grant) at price 1.96 per share. | 12.8K | $25.00K |
| May 28, 2026 | Pei Melinda LitherlandDirector | Stock Award(Grant) at price 1.96 per share. | 12.8K | $25.00K |
| May 28, 2026 | Spignesi Robert G JrChief Executive Officer | Stock Award(Grant) at price 1.96 per share. | 12.8K | $25.00K |
| May 20, 2026 | Lowenstein IneseDirector | Stock Award(Grant) at price 0.00 per share. | 19.3K | — |
| May 20, 2026 | Bika DafniDirector | Stock Award(Grant) at price 0.00 per share. | 19.3K | — |
| May 20, 2026 | Malloy KirkDirector | Stock Award(Grant) at price 0.00 per share. | 19.3K | — |
| May 20, 2026 | Kollender Richard SDirector | Stock Award(Grant) at price 0.00 per share. | 19.3K | — |
| May 20, 2026 | Pei Melinda LitherlandDirector | Stock Award(Grant) at price 0.00 per share. | 19.3K | — |
| Mar 10, 2026 | Wirtjes Sean M. CpaChief Financial Officer | Sale at price 4.32 per share. | 7.5K | $32.30K |
| Mar 10, 2026 | Wilson John J. AddingtonChief Operating Officer | Sale at price 4.32 per share. | 9.6K | $41.47K |
| Mar 9, 2026 | Spignesi Robert G JrChief Executive Officer | Sale at price 4.11 per share. | 17.9K | $73.69K |
| Feb 26, 2026 | Ricciardi Natale SDirector | Conversion of Exercise of derivative security at price 0.75 per share. | 842 | $632 |
| Feb 19, 2026 | Wirtjes Sean M. CpaChief Financial Officer | Sale at price 3.92 per share. | 17.3K | $67.69K |
| Feb 19, 2026 | Wilson John J. AddingtonChief Operating Officer | Sale at price 3.92 per share. | 5.4K | $21.20K |
| Feb 18, 2026 | Spignesi Robert G JrChief Executive Officer | Sale at price 3.89 per share. | 38.3K | $148.91K |
| Feb 10, 2026 | Wirtjes Sean M. CpaChief Financial Officer | Stock Award(Grant) at price 0.00 per share. | 97K | — |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 52.8 | -2.3 | -47.6 | 5.7 | -16.3 | -13.9 | 23.1 | -28.6 | -32.2 | -15.2 | −69.9% | ||
| 2025 | 98.9 | 70.4 | -13.4 | -12.1 | 43.5 | 3.6 | -3.5 | -27.6 | 38.6 | -10.5 | 40.1 | -30.8 | +222.2% |
| 2024 | 29.1 | 15.2 | -11.8 | 1.4 | -18.7 | -17.5 | 0.2 | 28.6 | 4.7 | 21.3 | -3.2 | -13.9 | +21.6% |
| 2023 | 32.7 | -28.7 | 22.4 | -24.0 | 5.5 | -4.8 | -1.9 | -1.6 | 11.9 | -4.6 | 13.6 | -36.8 | −34.5% |
| 2022 | -33.0 | -2.0 | -2.9 | -14.1 | -14.1 | -14.2 | 6.3 | -27.1 | -3.0 | -9.6 | -29.8 | -44.9 | −89.4% |
| 2021 | -14.8 | -2.3 | 10.4 | -39.6 | -13.6 | −52.1% |
Buy / hold / sell counts
Rapid Micro Biosystems, Inc., a life sciences technology company, provides products for the detection of microbial contamination in the manufacture of pharmaceutical, biologics, medical devices, and personal care products in the United States, Switzerland, Germany, Japan, and internationally. The company offers Growth Direct platform, which includes growth direct system, proprietary consumables, lab information management system connection software, and customer support and validation services. Its platform automates and modernizes the antiquated, manual microbial quality control (MQC), testing workflows for therapeutic modalities, such as biologics and cell and gene therapies, vaccines, and sterile injectables. The company also provides onsite technical training services. Its solutions are used in environmental monitoring, water, bioburden, and sterility release testing applications. In addition, the company offers RMBNucleus Mold Alarm software; and Growth Direct LIMS connection software. Rapid Micro Biosystems, Inc. was formerly known as Genomic Profiling Systems, Inc. and changed its name to Rapid Micro Biosystems, Inc. The company was incorporated in 2006 and is headquartered in Lexington, Massachusetts.