Rapid Micro Biosystems
RPID
42 hedge funds and large institutions have $42.5M invested in Rapid Micro Biosystems in 2025 Q4 according to their latest regulatory filings, with 15 funds opening new positions, 11 increasing their positions, 7 reducing their positions, and 2 closing their positions.
650% more first-time investments, than exits
New positions opened: 15 | Existing positions closed: 2
57% more repeat investments, than reductions
Existing positions increased: 11 | Existing positions reduced: 7
45% more funds holding
Funds holding: 29 → 42 (+13)
0.63% less ownership
Funds ownership: 37.34% → 36.71% (-0.63%)
14% less capital invested
Capital invested by funds: $49.5M → $42.5M (-$7.02M)
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$439K |
| 2 |
6CM
683 Capital Management
New York
|
+$419K |
| 3 |
Millennium Management
New York
|
+$405K |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$395K |
| 5 |
SEI Investments
Oaks,
Pennsylvania
|
+$325K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PHP
Parkman Healthcare Partners
Stamford,
Connecticut
|
-$1.94M |
| 2 |
BlackRock
New York
|
-$1.14M |
| 3 |
SSA
Schonfeld Strategic Advisors
New York
|
-$1.02M |
| 4 |
EFA
Evernest Financial Advisors
Carmel,
Indiana
|
-$261K |
| 5 |
XT
XTX Topco
George Town,
Cayman Islands
|
-$74K |
RPID Hedge Fund Activity: Q4 2025 in Review
42 of the 8,228 institutional investors tracked by Wall St. Rank reported a position in Rapid Micro Biosystems (RPID) for Q4 2025, worth a combined $42.5M — down 14% from $49.5M a quarter earlier.
Buyers outnumbered sellers: 15 funds opened new RPID positions and 2 closed out — a net gain of 13 holders — while 11 added to existing stakes and 7 trimmed.
The largest buyer was Citadel Advisors, opening a new position worth an estimated $439K. The largest seller was Parkman Healthcare Partners, cutting an estimated $1.94M.
- 42 institutional investors held Rapid Micro Biosystems (RPID) as of Q4 2025, up from 29 in Q3 2025.
- Funds reported $42.5M of Rapid Micro Biosystems stock for Q4 2025, down 14% quarter-over-quarter.
- 15 funds opened new Rapid Micro Biosystems positions in Q4 2025 and 2 closed out, a net change of +13 holders.
- The largest Rapid Micro Biosystems buyer in Q4 2025 was Citadel Advisors, an estimated $439K added.
- The largest Rapid Micro Biosystems seller in Q4 2025 was Parkman Healthcare Partners, an estimated $1.94M sold.
Based on aggregated 13F filings for Q4 2025.