RPID

Rapid Micro Biosystems, Inc.

Company with tickers: RPID

CIK

1380106

CUSIP

75340L104

Shares Outstanding

45,322,280

13F Activity (30d)

42 filings 40 filers

Total shares sold short and not yet covered, reported to FINRA by broker-dealers and published twice a month (bi-monthly). Days to cover divides the short position by average daily volume; a high value (above 5) can signal short-squeeze potential.

Short Squeeze Score

52/100

Short interest 1.7% of shares — P46 Days to cover 3.9 — P62 Short-volume trend -1.4% — P46

Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-05-29). Equal-weight mean of the available factors.

1M 3M 6M 1Y 5Y All

Short Interest History

Settlement Date	Current Position	Previous Position	Change	Avg Daily Volume	Days to Cover
2026-05-29	748,445	659,825	+88,620	191,578	3.91
2026-05-15	659,825	808,896	-149,071	127,775	5.16
2026-04-30	808,896	543,866	+265,030	193,334	4.18
2026-04-15	543,866	377,502	+166,364	185,162	2.94
2026-03-31	377,502	317,445	+60,057	276,966	1.36
2026-03-13	317,445	216,880	+100,565	235,152	1.35
2026-02-27	216,880	177,566	+39,314	100,609	2.16
2026-02-13	177,566	166,073	+11,493	225,969	1.00
2026-01-30	166,073	178,556	-12,483	426,155	1.00
2026-01-15	178,556	178,907	-351	354,234	1.00
2025-12-31	178,907	161,309	+17,598	146,428	1.22
2025-12-15	161,309	238,781	-77,472	106,055	1.52
2025-11-28	238,781	301,487	-62,706	101,544	2.35
2025-11-14	301,487	310,680	-9,193	160,911	1.87
2025-10-31	310,680	322,737	-12,057	82,097	3.78
2025-10-15	322,737	378,496	-55,759	93,123	3.47
2025-09-30	378,496	384,672	-6,176	60,001	6.31
2025-09-15	384,672	340,630	+44,042	84,253	4.57
2025-08-29	340,630	338,113	+2,517	59,738	5.70
2025-08-15	338,113	344,774	-6,661	124,974	2.71
2025-07-31	344,774	409,487	-64,713	111,443	3.09
2025-07-15	409,487	515,575	-106,088	68,096	6.01
2025-06-30	515,575	687,965	-172,390	86,705	5.95
2025-06-13	687,965	737,522	-49,557	85,234	8.07

Showing 1–24 of 24 settlements