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 Q3 2026

13F reference period

Q2 2026

Institutions Reporting

35

Shares (Excl. Options)

18.09MFull value: 18,090,170 · shares · 30 Jun 2026

Price

$1.73

The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.

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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
18,090,170
Latest holder snapshot 5 signals
Total 13F value
$31,295,242
Portfolio coverage rank
0%
Share change
+1,692,901
Value change
+$2,580,170
Number of holders
35
Issuer context Names, identifiers, and filing context for this profile. 3 identity fields
Shares outstanding
45,651,578
SEC-reported price per share
$0.86
Insider filing price
$0.86
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source

Key facts

  • RPID - RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share is tracked under CUSIP 75340L104.
  • 35 institutions reported positions in Q2 2026.
  • 5 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 46 to 35 between Q1 2026 and Q2 2026.
  • SEC-reported value moved from
    $36MFull value: $35,996,006 · USD · 31 Mar 2026
    to
    $31.3MFull value: $31,295,242 · USD · 30 Jun 2026
    .

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

Latest holder context comes from 35 institutions filings for Q2 2026.

Open SEC evidence

Security key

75340L104

13F reference period

Q2 2026

13F holders

35

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

Latest 13F filings Latest 13D/G filings All securities

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, 35 institutional investors reported holding
18.09MFull value: 18,090,170 · shares · 30 Jun 2026
shares of RAPID MICRO BIOSYSTEMS, INC. - Class A common stock, $0.01 par value per share (RPID). This represents 40% of the company’s total
45.65MFull value: 45,651,578 · shares · Stored outstanding share count
outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
40%
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
KHAZANAH NASIONAL BERHAD 1.2% 566,905 0% 0.06% $980,746
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

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods
21
Headline period
Q2 2026
Rows shown
1-21 of 21
Period 13F Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q3 195,542 $201,506 -$533,534 $1.03 7
2026 Q2 18,090,170 $31,295,242 +$2,580,170 $1.73 35
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
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