Rapid Micro Biosystems Inc-a
$1.67+0.6%
+$4.0M
Net Activity
+10.63% total shares
Institutions Holding
34
Popularity Rank
#7177
Avg Weight
1.14%
Total Value
$30.3M
Market Cap
$74.6M
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 #7177 out of 37503 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.
Bain Capital Life Sciences Investors, LLC has trimmed its RPID position for two straight quarters, cutting it by $9.9M while still holding $14.6M.
RPID is up 0.6% today, and institutions have been net buyers of $4.0M this quarter — today's price move and the underlying institutional flow are pointing the same direction.
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 2026-06-30 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.
4
Filings (90d)
$44K
Total Est. Value
25K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| Wilson John J. Addington | 2026-07-08 | $17K |
| Wilson John J. Addington | 2026-07-01 | $11K |
| Wilson John J. Addington | 2026-06-22 | $6K |
| Wilson John J. Addington | 2026-06-10 | $9K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
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
6,242
Total reported value
$2.2T
3230 13F institutions increased their position this quarter
Institutions Holding
5,990
Total reported value
$3.6T
3033 13F institutions increased their position this quarter
Institutions Holding
6,153
Total reported value
$1.8T
2972 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,125
Total reported value
$257.5B
Held by 4125 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,113
Total reported value
$649.2B
Held by 4113 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,112
Total reported value
$279.5B
Held by 4112 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