RAPID MICRO BIOSYSTEMS INC-A (RPID) Institutional Shareholders
RAPID MICRO BIOSYSTEMS INC-A (RPID) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $30.07M in RPID holdings during the latest filing period.
Bain Capital Life Sciences Investors, Llc is currently the largest disclosed institutional shareholder of RPID tracked by InsiderSet, reporting ownership valued at approximately $14.59M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $14.17M, representing an estimated loss of -2.89% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 95% of the total disclosed RPID value among the investors covered in this analysis. Major shareholders include Bain Capital Life Sciences Investors, Llc, Armistice Capital, Llc, Abg-Wtt Global Life Science Capital Partners Gp Ltd, and several other long-term asset managers with concentrated positions in RAPID MICRO BIOSYSTEMS INC-A (RPID).
This page ranks the largest institutional RPID shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
34
Total Reported Value
$30.07M
Largest Holder
Bain Capital Life Sciences Investors, Llc
Largest Position
$14.59M
Insider Transactions (90d)
13
Latest Filing Quarter
Q2 2026
New Institutional Positions
56
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Bain Capital Life Sciences Investors, Llc | 0.87% | 8,434,560 | $14,591,789 | $14,170,061 | -$421,728 | -2.89% | |
| Armistice Capital, Llc | 0.16% | 3,328,000 | $5,757,440 | $5,591,040 | -$166,400 | -2.89% | |
| Abg-Wtt Global Life Science Capital Partners Gp Ltd | 37.39% | 1,848,296 | $3,197,552 | $3,105,137 | -$92,415 | -2.89% | |
| Vanguard Capital Management Llc | 0.00% | 982,034 | $1,698,919 | $1,649,817 | -$49,102 | -2.89% | |
| Evernest Financial Advisors, Llc | 0.18% | 506,000 | $875,380 | $850,080 | -$25,300 | -2.89% | |
| Advent International, L.P. | 0.00% | 379,794 | $657,044 | $638,054 | -$18,990 | -2.89% | |
| Essex Investment Management Co Llc | 0.08% | 362,696 | $627,464 | $609,329 | -$18,135 | -2.89% | |
| Millennium Management Llc | 0.00% | 236,599 | $409,316 | $397,486 | -$11,830 | -2.89% | |
| Geode Capital Management, Llc | 0.00% | 228,041 | $394,706 | $383,109 | -$11,597 | -2.94% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 212,101 | $366,935 | $356,330 | -$10,605 | -2.89% |
| Blackrock, Inc. | 0.00% | 189,832 | $328,410 | $318,918 | -$9,492 | -2.89% | |
| Vanguard Fiduciary Trust Co | 0.00% | 110,484 | $191,137 | $185,613 | -$5,524 | -2.89% | |
| Dimensional Fund Advisors Lp | 0.00% | 104,192 | $180,253 | $175,043 | -$5,210 | -2.89% | |
| State Street Corp | 0.00% | 93,874 | $162,402 | $157,708 | -$4,694 | -2.89% | |
| Xtx Topco Ltd | 0.00% | 79,727 | $137,928 | $133,941 | -$3,987 | -2.89% | |
| Sei Investments Co | 0.00% | 66,869 | $115,683 | $112,340 | -$3,343 | -2.89% | |
| Northern Trust Corp | 0.00% | 42,106 | $72,843 | $70,738 | -$2,105 | -2.89% | |
| Algert Global Llc | 0.00% | 38,307 | $66,271 | $64,356 | -$1,915 | -2.89% | |
| Morgan Stanley | 0.00% | 27,587 | $47,726 | $46,346 | -$1,380 | -2.89% | |
| Jane Street Group, Llc | 0.00% | 25,931 | $44,861 | $43,564 | -$1,297 | -2.89% | |
| Citadel Advisors Llc | 0.00% | 16,142 | $27,926 | $27,119 | -$807 | -2.89% | |
| Osaic Holdings, Inc. | 0.00% | 14,300 | $24,739 | $24,024 | -$715 | -2.89% | |
| Nano Cap New Millennium Growth Fund L P | 0.02% | 12,500 | $21,625 | $21,000 | -$625 | -2.89% | |
| American Century Companies Inc | 0.00% | 11,638 | $20,134 | $19,552 | -$582 | -2.89% | |
| Vanguard Global Advisers, Llc | 0.00% | 11,630 | $20,120 | $19,538 | -$582 | -2.89% | |
| Larson Financial Group Llc | 0.00% | 8,395 | $14,523 | $14,104 | -$419 | -2.89% | |
| Ubs Group Ag | 0.00% | 6,607 | $11,430 | $11,100 | -$330 | -2.89% | |
| Tower Research Capital Llc (Trc) | 0.00% | 1,900 | $3,287 | $3,192 | -$95 | -2.89% | |
| Barclays Plc | 0.00% | 337 | $583 | $566 | -$17 | -2.89% | |
| Cwm, Llc | 0.00% | 188 | $427 | $316 | -$111 | -26.03% | |
| Jpmorgan Chase & Co | 0.00% | 109 | $189 | $183 | -$6 | -3.11% | |
| Caitong International Asset Management Co., Ltd | 0.00% | 35 | $61 | $59 | -$2 | -3.61% | |
| Hrt Financial Lp | 0.00% | 23,093 | $39 | $38,796 | +$38,757 | +99377.54% | |
| Sbi Securities Co., Ltd. | 0.00% | 15 | $26 | $25 | -$1 | -3.08% |
Frequently asked questions about RPID
Who owns the most RPID stock?
The largest holders of RPID are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for RAPID MICRO BIOSYSTEMS INC-A (RPID).
Is RPID widely held by superinvestors?
Many widely followed stocks like RPID appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly RPID is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.