Rapid Micro Biosystems Inc-a
$0.76-9.6%
+$4.0M
Net Activity
+10.63% total shares
Institutions Holding
34
Popularity Rank
#7186
Avg Weight
1.14%
Total Value
$30.3M
Market Cap
$34.1M
34 institutions currently hold RPID, with 15 net buyers and 29 net sellers this quarter.
Institutional Moves (Q2 2026)
Majority Decreased
Based on recent trading activity
Net Selling Institutions
29
Net Buying Institutions
15
Top 5 by Value
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Across its top 20 institutional holders, RPID's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 19/100, avg. turnover score 42/100).
RPID ranks #7186 out of 37696 tracked stocks by institutional interest, inside the more closely watched half of our coverage.
RPID is a top-conviction position for ABG-WTT Global Life Science Capital Partners GP Ltd — at 37.4% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in RPID belongs to Bain Capital Life Sciences Investors, LLC, but the position matters far more to ABG-WTT Global Life Science Capital Partners GP Ltd, who has 37.4% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
RPID is down 9.6% today, but institutions show net buying of $4.0M this quarter — a divergence between today's price move and the underlying institutional flow.
RPID reported a net loss of $51.2M over the trailing twelve months.
+$6.3M
Total Buy Value
$3.7M
Total Sell Value
15
Net Buyers
29
Net Sellers
RPID
Q2 2026
Top 5 Institutional Movers
+$5.8M
-$596.9K
RPID does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
No Form 144 planned sale filings in the last 90 days
1
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Bain Capital Life Sciences Fund, L.P. | 13G/A | 2026-08-14 | 16.8% |
1
Filings (14d)
Rapid Micro Biosystems issued a press release on August 7, 2026, announcing its financial results for the second quarter ended June 30, 2026. The release is attached as Exhibit 99.1 to this 8-K. The information is being "furnished" rather than "filed," so it is not subject to Section 18 liability under the Securities Exchange Act of 1934. Note that the excerpt does not include the actual financial figures.
View Full Filing (SEC EDGAR)75340L104
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,146
Total reported value
$257.5B
Held by 4146 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,137
Total reported value
$279.7B
Held by 4137 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,136
Total reported value
$649.5B
Held by 4136 institutions — one of the most-tracked stocks on AlphaSMO
Access RPID's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/RPIDCLI
npx alphasmo stocks get RPID