RAPID MICRO BIOSYSTEMS INC RPID
CLASS A COM · Common Stock · CUSIP 75340L104
- SectorTechnology
- IndustryLaboratory Analytical Instruments
- HeadquartersLexington, MA
- FilingsSEC EDGAR
32
institutional holders
-11 vs Q4 2022
22.9m
shares reported held*
$34.5mreported value*
1 new
6 added
12 reduced
12 sold out
net sold ≈ $2.2m (-1.6m shares)
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $1.51.
Trends to Q1 2023
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 54 |
| Q4 2022 | 43 |
| Q1 2023 | 32 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Bought or addedCut or sold out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 16 | 28 |
| Q1 2023 | 7 | 24 |
Biggest buyers
| JPMORGAN CHASE & CO | Added | +1.5m |
| RESOURCES MANAGEMENT CORP /CT/ /ADV | Added | +49.5k |
| RENAISSANCE TECHNOLOGIES LLC | New | +40.7k |
| CITIGROUP INC | Added | +15.5k |
| GLENVIEW CAPITAL MANAGEMENT, LLC | Added | +7.9k |
| BlackRock Inc. | Added | +1.6k |
| WELLS FARGO & COMPANY/MN | Added | +2 |
Biggest sellers
| T. Rowe Price Investment Management, Inc. | Sold out | -2.2m |
| Oasis Management Co Ltd. | Sold out | -187.6k |
| Rhenman & Partners Asset Management AB | Reduced | -172.8k |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Sold out | -161.4k |
| FRED ALGER MANAGEMENT, LLC | Sold out | -123.8k |
| GOLDMAN SACHS GROUP INC | Reduced | -89.0k |
| TD Asset Management Inc | Reduced | -58.7k |
| Magnetar Financial LLC | Sold out | -56.9k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -40.1k |
| Bank of New York Mellon Corp | Sold out | -29.9k |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Bain Capital Life Sciences Fund, L.P. 13G · exempt (held before listing) filed 2026-08-14 | 16.8% |
| Longitude Capital Partners II, LLC 13G · exempt (held before listing) filed 2026-05-15 | 8.6% |
| ARMISTICE CAPITAL, LLC 13G · institution new · filed 2026-08-14 | 7.3% |
Spignesi Robert G. Jr.
13D · may seek influence
new · filed 2025-08-19
Stated purposeThe information set forth or incorporated by reference in Items 3 and 6 of this Statement is incorporated by reference into this Item 4. The Reporting Person intends to continuously review his investment in the Issuer and may in the future determine (1) to acquire additional securities of the Issuer, through open market purchases, private agreements or otherwise, (2) to dispose of all or a portion of the securities of the Issuer owned by him or (3) to take any other available course of action. Notwithstanding anything contained herein, the Reporting Person specifically reserves the right to change his intention with respect to any or all of such matters. In reaching any decision as to his course of action (as well as to the specific elements thereof), the Reporting Person currently expect… Full filing |
6.3% |
| Endeavour Medtech Growth II LP 13G · passive investor filed 2026-02-13 | 5.7% |
Insider purchases and sales in Q1 2023
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
BuyingSelling
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2021 | 0 | — | 0 | — | — |
| Q3 2021 | 0 | — | 0 | — | — |
| Q4 2021 | 0 | — | 0 | — | — |
| Q1 2022 | 1 | $69.5k | 0 | — | — |
| Q2 2022 | 1 | $38.0k | 0 | — | — |
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 0 | — | 0 | — | — |
| Q1 2023 | 0 | — | 0 | — | — |
None reported in Q1 2023.
Holders, Q1 2023
| Manager | Shares | Change |
|---|---|---|
| Bain Capital Life Sciences Investors, LLC 1.38% of their portfolio | 8.4m $11.0m | Unchanged |
| KENNEDY LEWIS MANAGEMENT LP 17.03% of their portfolio | 4.9m $6.5m | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 1.5m $1.9m | Added +1.5m |
| ABG-WTT Global Life Science Capital Partners GP Ltd 21.45% of their portfolio | 1.0m $1.4m | Unchanged |
| BlackRock Inc. 0.00% of their portfolio | 1.0m $1.3m | Added +1.6k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 944.3k $1.2m | Reduced -89.0k |
| GLENVIEW CAPITAL MANAGEMENT, LLC 0.03% of their portfolio | 818.3k $1.1m | Added +7.9k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 760.4k $997.0k | Reduced -40.1k |
| VANGUARD GROUP INC 0.00% of their portfolio | 729.6k $955.8k | Unchanged |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.00% of their portfolio | 700.0k $917.0k | Reduced -16.2k |
| Ally Bridge Group (NY) LLC 1.20% of their portfolio | 699.7k $916.6k | Unchanged |
| Advent International, L.P. 0.01% of their portfolio | 577.8k $756.9k | Unchanged |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 138.0k $180.8k | Unchanged |
| Rhenman & Partners Asset Management AB 0.02% of their portfolio | 127.2k $165.3k | Reduced -172.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 96.6k $126.6k | Reduced -1.3k |
| TD Asset Management Inc 0.00% of their portfolio | 58.5k $76.6k | Reduced -58.7k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 53.1k $69.6k | Reduced -27 |
| RESOURCES MANAGEMENT CORP /CT/ /ADV 0.75% of their portfolio | 50.0k $4.6m | Added +49.5k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 40.7k $53.0k | New |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 35.1k $46.0k | Reduced -12.5k |
| STATE STREET CORP 0.00% of their portfolio | 26.1k $34.2k | Unchanged |
| Parkwood LLC 0.01% of their portfolio | 24.5k $32.0k | Unchanged |
| NORTHERN TRUST CORP 0.00% of their portfolio | 21.5k $28.2k | Unchanged |
| CITIGROUP INC 0.00% of their portfolio | 15.7k $20.5k | Added +15.5k |
| Schonfeld Strategic Advisors LLC 0.00% of their portfolio | 15.0k $19.6k | Unchanged |
| Ergoteles LLC 0.00% of their portfolio | 13.6k $17.8k | Reduced -16.9k |
| MORGAN STANLEY 0.00% of their portfolio | 10.2k $13.4k | Reduced -3.7k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 4.6k $6.0k | Reduced -5.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 211 $276 | Reduced -5.5k |
| Advisory Services Network, LLC 0.00% of their portfolio | 100 $131 | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 81 $106 | Added +2 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio | 0 $0 | Unchanged |