Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

RAPID MICRO BIOSYSTEMS, INC.

RPID · Nasdaq · CIK 0001380106 · Healthcare · Medical Devices

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

13 Form 4 transaction lines observed in the same window
0 sales · 13 option, withholding, award, gift or other lines

Last qualifying purchase2024-12-05 · PEI MELINDA LITHERLAND · $9.5K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesNone
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Spignesi Robert G. Jr.PRESIDENT AND CEO
○○
PEI MELINDA LITHERLANDDirector
○○
Malloy KirkDirector
○○
LOWENSTEIN INESEDirector
○○
Kollender Richard SDirector
○○
WIRTJES SEAN MCHIEF FINANCIAL OFFICER
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 1 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2024-12-05 · PEI MELINDA LITHERLAND.

Recent Form 4 activity

0Purchases
14Sales
19Other Form 4 lines
28SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER13 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
853,972
Previous report
940,376
Avg daily volume
374,932
Days to cover
2.3

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2024-12-05PEI MELINDA LITHERLANDPurchase (P)Class A Common Stock9,120USD 1.04USD 9,485SEC filing ↗
2024-12-03PEI MELINDA LITHERLANDPurchase (P)Class A Common Stock10,880USD 1.00USD 10,880SEC filing ↗
2024-11-27PEI MELINDA LITHERLANDPurchase (P)Class A Common Stock19,892USD 1.05USD 20,887SEC filing ↗
2024-11-26PEI MELINDA LITHERLANDPurchase (P)Class A Common Stock108USD 1.04USD 112SEC filing ↗
2024-08-08Malloy KirkPurchase (P)Class A Common Stock50,000USD 0.91USD 45,500SEC filing ↗
2024-08-07WIRTJES SEAN MPurchase (P)Class A Common Stock10,000USD 0.78USD 7,800SEC filing ↗
2024-08-06Spignesi Robert G. Jr.Purchase (P)Class A Common Stock50,000USD 0.77USD 38,500SEC filing ↗
2024-08-06Kollender Richard SPurchase (P)Class A Common Stock65,000USD 0.77USD 50,050SEC filing ↗
2023-09-06WIRTJES SEAN MPurchase (P)Class A Common Stock10,000USD 0.99USD 9,900SEC filing ↗
2023-08-15Spignesi Robert G. Jr.Purchase (P)Class A Common Stock20,000USD 0.97USD 19,400SEC filing ↗
2023-08-08Spignesi Robert G. Jr.Purchase (P)Class A Common Stock34,000USD 0.92USD 31,280SEC filing ↗
2023-05-17Spignesi Robert G. Jr.Purchase (P)Class A Common Stock19,900USD 0.91USD 18,127SEC filing ↗
2022-06-03CHENE DAVID; KENNEDY LEWIS INVESTMENT MANAGEMENT LLC; KENNEDY LEWIS MANAGEMENT LP; KLM GP LLC; Kennedy Lewis Capital Partners Master Fund II LP; Kennedy Lewis Capital Partners Master Fund III LP; Kennedy Lewis GP II LLC; Kennedy Lewis GP III LLC; Kennedy Lewis Investment Holdings II LLC; Richman DarrenPurchase (P)Common Stock50,000USD 4.66USD 233,000SEC filing ↗
2022-06-02CHENE DAVID; KENNEDY LEWIS INVESTMENT MANAGEMENT LLC; KENNEDY LEWIS MANAGEMENT LP; KLM GP LLC; Kennedy Lewis Capital Partners Master Fund II LP; Kennedy Lewis Capital Partners Master Fund III LP; Kennedy Lewis GP II LLC; Kennedy Lewis GP III LLC; Kennedy Lewis Investment Holdings II LLC; Richman DarrenPurchase (P)Common Stock10,100USD 4.99USD 50,399SEC filing ↗
2022-06-01CHENE DAVID; KENNEDY LEWIS INVESTMENT MANAGEMENT LLC; KENNEDY LEWIS MANAGEMENT LP; KLM GP LLC; Kennedy Lewis Capital Partners Master Fund II LP; Kennedy Lewis Capital Partners Master Fund III LP; Kennedy Lewis GP II LLC; Kennedy Lewis GP III LLC; Kennedy Lewis Investment Holdings II LLC; Richman DarrenPurchase (P)Common Stock47,117USD 4.76USD 224,277SEC filing ↗

Form 4 evidence

33 transaction lines in the latest 365-day window; 149 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-24Kollender Richard SOption exercise / conversion (M)Class A Common Stock3,508USD 0.75USD 2,631SEC filing ↗
2026-07-22Spignesi Robert G. Jr.Option exercise / conversion (M)Class A Common Stock1,402USD 0.75USD 1,052SEC filing ↗
2026-05-29WIRTJES SEAN MAward / grant (A)Class A Common Stock12,787USD 1.96USD 25,063SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-24Kollender Richard SOption exercise / conversion (M)Class A Common Stock3,508USD 0.75USD 2,631SEC filing ↗
2026-07-22Spignesi Robert G. Jr.Option exercise / conversion (M)Class A Common Stock1,402USD 0.75USD 1,052SEC filing ↗
2026-05-29WIRTJES SEAN MAward / grant (A)Class A Common Stock12,787USD 1.96USD 25,063SEC filing ↗
2026-05-29Spignesi Robert G. Jr.Award / grant (A)Class A Common Stock12,787USD 1.96USD 25,063SEC filing ↗
2026-05-29PEI MELINDA LITHERLANDAward / grant (A)Class A Common Stock12,787USD 1.96USD 25,063SEC filing ↗
2026-05-29Malloy KirkAward / grant (A)Class A Common Stock12,787USD 1.96USD 25,063SEC filing ↗
2026-05-29LOWENSTEIN INESEAward / grant (A)Class A Common Stock12,787USD 1.96USD 25,063SEC filing ↗
2026-05-21PEI MELINDA LITHERLANDAward / grant (A)Class A Common Stock19,300USD 0.00USD 0SEC filing ↗
2026-05-21Malloy KirkAward / grant (A)Class A Common Stock19,300USD 0.00USD 0SEC filing ↗
2026-05-21LOWENSTEIN INESEAward / grant (A)Class A Common Stock19,300USD 0.00USD 0SEC filing ↗
2026-05-21Kollender Richard SAward / grant (A)Class A Common Stock19,300USD 0.00USD 0SEC filing ↗
2026-05-21Bika DafniAward / grant (A)Class A Common Stock19,300USD 0.00USD 0SEC filing ↗
2026-03-11Wilson John J. AddingtonSale (S)Class A Common Stock9,603USD 4.32USD 41,485SEC filing ↗
2026-03-11WIRTJES SEAN MSale (S)Class A Common Stock7,480USD 4.32USD 32,314SEC filing ↗
2026-03-10Spignesi Robert G. Jr.Sale (S)Class A Common Stock17,922USD 4.11USD 73,659SEC filing ↗
2026-02-27RICCIARDI NATALE SOption exercise / conversion (M)Class A Common Stock842USD 0.75USD 632SEC filing ↗
2026-02-20Wilson John J. AddingtonSale (S)Class A Common Stock5,403USD 3.92USD 21,180SEC filing ↗
2026-02-20WIRTJES SEAN MSale (S)Class A Common Stock17,254USD 3.92USD 67,636SEC filing ↗
2026-02-19Spignesi Robert G. Jr.Sale (S)Class A Common Stock38,327USD 3.89USD 149,092SEC filing ↗
2026-02-11Wilson John J. AddingtonAward / grant (A)Class A Common Stock74,000USD 0.00USD 0SEC filing ↗
2026-02-11WIRTJES SEAN MAward / grant (A)Class A Common Stock97,000USD 0.00USD 0SEC filing ↗
2026-02-11Spignesi Robert G. Jr.Award / grant (A)Class A Common Stock264,000USD 0.00USD 0SEC filing ↗
2026-02-09Wilson John J. AddingtonSale (S)Class A Common Stock4,610USD 3.78USD 17,426SEC filing ↗
2026-02-09WIRTJES SEAN MSale (S)Class A Common Stock6,027USD 3.78USD 22,782SEC filing ↗
2026-02-09Spignesi Robert G. Jr.Sale (S)Class A Common Stock12,840USD 3.78USD 48,535SEC filing ↗
2026-02-04ENRIGHT PATRICK G; Longitude Capital Partners II, LLC; Longitude Prime Fund, L.P.; Longitude Prime Partners, LLC; Longitude Venture Partners II, L.P.; Tammenoms Bakker JulietSale (S)Class A Common Stock49,000USD 3.88USD 190,120SEC filing ↗
2026-02-03ENRIGHT PATRICK G; Longitude Capital Partners II, LLC; Longitude Prime Partners, LLC; Longitude Venture Partners II, L.P.; Tammenoms Bakker JulietSale (S)Class A Common Stock27,500USD 4.24USD 116,600SEC filing ↗
2026-02-02ENRIGHT PATRICK G; Longitude Capital Partners II, LLC; Longitude Prime Partners, LLC; Longitude Venture Partners II, L.P.; Tammenoms Bakker JulietSale (S)Class A Common Stock27,500USD 4.25USD 116,875SEC filing ↗
2026-01-30ENRIGHT PATRICK G; Longitude Capital Partners II, LLC; Longitude Prime Partners, LLC; Longitude Venture Partners II, L.P.; Tammenoms Bakker JulietSale (S)Class A Common Stock46,000USD 4.54USD 208,840SEC filing ↗
2026-01-23ENRIGHT PATRICK G; Longitude Capital Partners II, LLC; Longitude Prime Partners, LLC; Longitude Venture Partners II, L.P.; Tammenoms Bakker JulietX (X)Class A Common Stock629,032USD 0.05USD 31,452SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerRPID
CIK0001380106
SectorHealthcare
IndustryMedical Devices Yahoo Finance
SEC SIC3826 Laboratory Analytical Instruments
ExchangeNasdaq

Data coverage

Local Form 4 history149 transaction lines from 2021-07-19 to 2026-07-24
41 P purchase lines · 19 S sale lines · 89 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.