Latest Period
Q2 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 Q2 2026
Institutions Reporting
34
Shares (Excl. Options)
17,523,265
Price
$1.73
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- Security type / class
- Equity / Class A common stock, $0.01 par value per share
- Symbol
- RPID on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 17,523,265
- Total 13F value
- $30,314,496
- Portfolio coverage rank
- 0%
- Share change
- +1,692,901
- Value change
- +$2,580,170
- Number of holders
- 34
- Shares outstanding
- 45,651,578
- SEC-reported price per share
- $1.73
- Insider filing price
- $1.73
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.
- 34 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 46 to 34 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $35,996,006 to $30,314,496.
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 34 institutions filings for Q2 2026.
Security key
75340L104
Latest holder period
Q2 2026
13F holders
34
13D/G owners
5
CIK / CUSIP context first
Open Q2 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
5
Security
RPID
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Bain Capital Life Sciences Fund, L.P. | 17% | $13,160,355 | 7,651,369 | Bain Capital Life Sciences Fund, L.P. | 30 Jun 2026 | |||
| Longitude Capital Partners II, LLC | 8.6% | $8,011,386 | 3,529,245 | Longitude Capital Partners II, LLC | 31 Mar 2026 | |||
| ARMISTICE CAPITAL, LLC | 7.3% | $5,724,160 | 3,328,000 | Armistice Capital, LLC | 30 Jun 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 30 Jun 2026, 34 institutional investors reported holding 17,523,265 shares of RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share (RPID). This represents 38% of the company’s total 45,651,578 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 | 18% | 8,434,560 | 0% | 0.87% | $14,591,789 |
| ARMISTICE CAPITAL, LLC | 7.3% | 3,328,000 | 0.16% | $5,757,440 | |
| ABG-WTT Global Life Science Capital Partners GP Ltd | 4% | 1,848,296 | 0% | 37% | $3,197,552 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.2% | 982,034 | -0.05% | 0% | $1,698,919 |
| Evernest Financial Advisors, LLC | 1.1% | 506,000 | +17% | 0.18% | $875,380 |
| Advent International, L.P. | 0.83% | 379,794 | -31% | 0% | $657,044 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 0.79% | 362,696 | -59% | 0.08% | $627,464 |
| MILLENNIUM MANAGEMENT LLC | 0.52% | 236,599 | -16% | 0% | $409,316 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.5% | 228,041 | -7.7% | 0% | $394,706 |
| RENAISSANCE TECHNOLOGIES LLC | 0.46% | 212,101 | +68% | 0% | $366,935 |
| BlackRock, Inc. | 0.42% | 189,832 | +21% | 0% | $328,410 |
| Legato Capital Management LLC | 0.26% | 119,534 | -57% | 0.02% | $206,794 |
| VANGUARD FIDUCIARY TRUST CO | 0.24% | 110,484 | +0.7% | 0% | $191,137 |
| DIMENSIONAL FUND ADVISORS LP | 0.23% | 104,192 | +19% | 0% | $180,253 |
| STATE STREET CORP | 0.21% | 93,874 | 0% | 0% | $162,402 |
| XTX Topco Ltd | 0.17% | 79,727 | +31% | 0% | $137,928 |
| SEI INVESTMENTS CO | 0.15% | 66,869 | -77% | 0% | $115,683 |
| NORTHERN TRUST CORP | 0.09% | 42,106 | -13% | 0% | $72,843 |
| ALGERT GLOBAL LLC | 0.08% | 38,307 | +65% | 0% | $66,271 |
| MORGAN STANLEY | 0.06% | 27,587 | -5.5% | 0% | $47,726 |
| JANE STREET GROUP, LLC | 0.06% | 25,931 | -80% | 0% | $44,861 |
| HRT FINANCIAL LP | 0.05% | 23,093 | 0% | $39,000 | |
| CITADEL ADVISORS LLC | 0.04% | 16,142 | 0% | $27,926 | |
| OSAIC HOLDINGS, INC. | 0.03% | 14,300 | +2.1% | 0% | $24,739 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | 0.03% | 12,500 | 0% | 0.02% | $21,625 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
20
Latest
Q2 2026
Rows shown
1-20 of 20
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 17,523,265 | $30,314,496 | +$2,580,170 | $1.73 | 34 |
| 2026 Q1 | 15,839,879 | $35,996,006 | +$1,910,908 | $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 |