RAPID MICRO BIOSYSTEMS INC-A (RPID) Institutional Ownership Changes & 13F Activity
RAPID MICRO BIOSYSTEMS INC-A (RPID). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Armistice Capital, Llc, Essex Investment Management Co Llc, Sei Investments Co, Susquehanna International Group, Llp, and Advent International, L.P..
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Citadel Advisors Llc | Buy | +16,142 | — | 16,142 | $27.93K | Q2 2026 | Sep 02, 2026 |
| Armistice Capital, Llc | Buy | +3,328,000 | — | 3,328,000 | $5.76M | Q2 2026 | Aug 14, 2026 |
| Sei Investments Co | Sell | -217,947 | -76.5% | 66,869 | $115.68K | Q2 2026 | Aug 14, 2026 |
| Advent International, L.P. | Sell | -172,583 | -31.2% | 379,794 | $657.04K | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Sell | -106,994 | -80.5% | 25,931 | $44.86K | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Sell | -46,681 | -16.5% | 236,599 | $409.32K | Q2 2026 | Aug 14, 2026 |
| Hrt Financial Lp | Buy | +23,093 | — | 23,093 | $39.00K | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Sell | -21,258 | -98.4% | 337 | $583.00 | Q2 2026 | Aug 14, 2026 |
| Xtx Topco Ltd | Buy | +18,657 | +30.6% | 79,727 | $137.93K | Q2 2026 | Aug 14, 2026 |
| Larson Financial Group Llc | Buy | +2,904 | +52.9% | 8,395 | $14.52K | Q2 2026 | Aug 14, 2026 |
| Osaic Holdings, Inc. | Buy | +300 | +2.1% | 14,300 | $24.74K | Q2 2026 | Aug 14, 2026 |
| Renaissance Technologies LLC | Buy | +85,484 | +67.5% | 212,101 | $366.94K | Q2 2026 | Aug 13, 2026 |
| Algert Global Llc | Buy | +15,126 | +65.3% | 38,307 | $66.27K | Q2 2026 | Aug 13, 2026 |
| Northern Trust Corp | Sell | -6,173 | -12.8% | 42,106 | $72.84K | Q2 2026 | Aug 13, 2026 |
| Ubs Group Ag | Sell | -4,645 | -41.3% | 6,607 | $11.43K | Q2 2026 | Aug 13, 2026 |
| Morgan Stanley | Sell | -1,620 | -5.5% | 27,587 | $47.73K | Q2 2026 | Aug 13, 2026 |
| Vanguard Fiduciary Trust Co | Buy | +772 | +0.7% | 110,484 | $191.14K | Q2 2026 | Aug 13, 2026 |
| Vanguard Capital Management Llc | Sell | -460 | -0.0% | 982,034 | $1.70M | Q2 2026 | Aug 13, 2026 |
| Geode Capital Management, Llc | Sell | -19,136 | -7.7% | 228,041 | $394.71K | Q2 2026 | Aug 12, 2026 |
| American Century Companies Inc | Sell | -5,284 | -31.2% | 11,638 | $20.13K | Q2 2026 | Aug 12, 2026 |
| Jpmorgan Chase & Co | Buy | +109 | — | 109 | $189.00 | Q2 2026 | Aug 12, 2026 |
| Dimensional Fund Advisors Lp | Buy | +16,603 | +19.0% | 104,192 | $180.25K | Q2 2026 | Aug 11, 2026 |
| Tower Research Capital Llc (Trc) | Buy | +1,900 | — | 1,900 | $3.29K | Q2 2026 | Aug 11, 2026 |
| Blackrock, Inc. | Buy | +32,600 | +20.7% | 189,832 | $328.41K | Q2 2026 | Aug 07, 2026 |
| Essex Investment Management Co Llc | Sell | -521,235 | -59.0% | 362,696 | $627.46K | Q2 2026 | Aug 06, 2026 |
| Legato Capital Management Llc | Sell | -155,390 | -56.5% | 119,534 | $206.79K | Q2 2026 | Aug 06, 2026 |
| Evernest Financial Advisors, Llc | Buy | +73,490 | +17.0% | 506,000 | $875.38K | Q2 2026 | Aug 06, 2026 |
| Caitong International Asset Management Co., Ltd | Buy | +35 | — | 35 | $61.00 | Q2 2026 | Aug 05, 2026 |
| Bank Of America Corp | Sell | -31,014 | -100.0% | 0 | $0.00 | Q2 2026 | May 18, 2026 |
| Susquehanna International Group, Llp | Sell | -212,114 | -100.0% | 0 | $0.00 | Q2 2026 | May 15, 2026 |
Frequently asked questions about RPID activity
Which institutional owners are buying RPID?
Institutional owners buying RPID include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in RPID activity?
"Buy" means an investor increased their reported position in RPID compared to the prior reporting period. This reflects growing exposure to RAPID MICRO BIOSYSTEMS INC-A (RPID) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in RPID increasing?
Institutional interest in RPID can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related RPID Institutional Insights
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