Latest Period
Q1 2026
Security Snapshot
RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share (RPID) Institutional Ownership
CUSIP: 75340L104
13F Institutional Holders and Ownership History from Q3 2021 to Q1 2026
Institutions Reporting
46
Shares (Excl. Options)
15,839,879
Price
$2.27
Save this security page for your next review
Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.
- Security type / class
- Equity / Class A common stock, $0.01 par value per share
- Symbol
- RPID on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 15,839,879
- Total 13F value
- $35,996,385
- Portfolio coverage rank
- 0%
- Share change
- +1,096,307
- Value change
- +$1,911,287
- Number of holders
- 46
- Shares outstanding
- 41,037,733
- SEC-reported price per share
- $2.58
- Insider filing price
- $2.58
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- RPID - RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share is tracked under CUSIP 75340L104.
- 46 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 42 to 46 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $42,504,363 to $35,996,385.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 46 institutions filings for Q1 2026.
Security key
75340L104
Latest holder period
Q1 2026
13F holders
46
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
RPID full holder history
RAPID MICRO BIOSYSTEMS, INC. SEC filings
RAPID MICRO BIOSYSTEMS, INC. company facts
RAPID MICRO BIOSYSTEMS, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 75340L104:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
RPID
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Longitude Capital Partners II, LLC | 8.6% | $8,011,386 | 3,529,245 | Longitude Capital Partners II, LLC | 31 Mar 2026 | |||
| Spignesi Robert G. Jr. | 6.3% | $9,133,033 | 2,647,256 | SPIGNESI ROBERT G JR | 28 Mar 2024 | |||
| Endeavour Medtech Growth II LP | 5.7% | $6,545,587 | 2,257,099 | Endeavour Medtech Growth II LP | 31 Dec 2025 |
As of 31 Mar 2026, 46 institutional investors reported holding 15,839,879 shares of RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share (RPID). This represents 39% of the company’s total 41,037,733 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
38%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Bain Capital Life Sciences Investors, LLC | 21% | 8,434,560 | 0% | 1.7% | $19,146,451 |
| ABG-WTT Global Life Science Capital Partners GP Ltd | 4.5% | 1,848,296 | 0% | 34% | $4,195,632 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.4% | 982,494 | 0% | 0% | $2,230,261 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 2.2% | 883,931 | +1318% | 0.32% | $2,006,523 |
| Advent International, L.P. | 1.3% | 552,377 | -4.4% | 0.03% | $1,253,896 |
| Evernest Financial Advisors, LLC | 1.1% | 432,510 | +246% | 0.21% | $1,020,724 |
| SEI INVESTMENTS CO | 0.69% | 284,816 | +204% | 0% | $646,532 |
| MILLENNIUM MANAGEMENT LLC | 0.69% | 283,280 | +143% | 0% | $643,046 |
| Legato Capital Management LLC | 0.67% | 274,924 | +1772% | 0.06% | $624,077 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.6% | 247,177 | +14% | 0% | $561,331 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.52% | 212,114 | +23% | 0% | $481,499 |
| BlackRock, Inc. | 0.38% | 157,232 | +0.36% | 0% | $356,916 |
| JANE STREET GROUP, LLC | 0.32% | 132,925 | +26% | 0% | $301,739 |
| RENAISSANCE TECHNOLOGIES LLC | 0.31% | 126,617 | +9.5% | 0% | $287,421 |
| 683 Capital Management, LLC | 0.29% | 120,773 | 0% | 0.03% | $274,155 |
| VANGUARD FIDUCIARY TRUST CO | 0.27% | 109,712 | 0% | 0% | $249,046 |
| STATE STREET CORP | 0.23% | 93,874 | +2.6% | 0% | $213,094 |
| DIMENSIONAL FUND ADVISORS LP | 0.21% | 87,589 | +56% | 0% | $198,679 |
| GOLDMAN SACHS GROUP INC | 0.18% | 71,912 | +30% | 0% | $163,240 |
| FIFTH LANE CAPITAL, LP | 0.17% | 71,000 | +301% | 0.2% | $161,170 |
| XTX Topco Ltd | 0.15% | 61,070 | 0% | $138,629 | |
| NORTHERN TRUST CORP | 0.12% | 48,279 | +19% | 0% | $109,593 |
| BANK OF AMERICA CORP /DE/ | 0.08% | 31,014 | +140% | 0% | $70,402 |
| MORGAN STANLEY | 0.07% | 29,207 | -7% | 0% | $66,300 |
| ALGERT GLOBAL LLC | 0.06% | 23,181 | 0% | $53,000 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
19
Latest
Q1 2026
Rows shown
1-19 of 19
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 15,839,879 | $35,996,385 | +$1,911,287 | $2.27 | 46 |
| 2025 Q4 | 14,620,290 | $42,504,363 | -$778,137 | $2.90 | 42 |
| 2025 Q3 | 14,828,987 | $49,529,221 | -$1,092,903 | $3.34 | 29 |
| 2025 Q2 | 15,145,610 | $52,253,212 | -$495,637 | $3.45 | 29 |
| 2025 Q1 | 15,315,094 | $40,431,707 | +$9,172,017 | $2.64 | 28 |
| 2024 Q4 | 11,949,084 | $10,753,903 | -$597,113 | $0.90 | 18 |
| 2024 Q3 | 17,558,874 | $15,627,447 | -$775,836 | $0.89 | 18 |
| 2024 Q2 | 18,509,095 | $12,216,040 | -$367,966 | $0.66 | 18 |
| 2024 Q1 | 18,013,714 | $17,474,138 | -$839,869 | $0.97 | 20 |
| 2023 Q4 | 20,091,717 | $14,868,385 | -$1,022,717 | $0.74 | 24 |
| 2023 Q3 | 21,456,755 | $23,172,706 | -$417,040 | $1.08 | 22 |
| 2023 Q2 | 21,872,837 | $21,873,560 | -$1,294,374 | $1.00 | 22 |
| 2023 Q1 | 22,805,840 | $29,875,332 | -$3,621,510 | $1.31 | 30 |
| 2022 Q4 | 24,500,193 | $27,692,193 | -$71,950 | $1.13 | 40 |
| 2022 Q3 | 25,605,992 | $82,661,264 | -$10,626,216 | $3.23 | 47 |
| 2022 Q2 | 26,054,592 | $112,038,000 | -$10,349,820 | $4.30 | 47 |
| 2022 Q1 | 26,648,497 | $180,967,834 | +$33,474,300 | $6.79 | 58 |
| 2021 Q4 | 21,436,197 | $227,867,000 | -$13,559,494 | $10.64 | 55 |
| 2021 Q3 | 21,751,532 | $401,371,000 | +$401,371,000 | $18.47 | 49 |