SEC filingsOct 12, 2026 to Oct 19, 2026: insiders reported 840 purchases and sales across 212 companies.840 insider purchases and sales in 7 daysSee the filings →
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Company profile

RPID

Rapid Micro Biosystems, Inc.
NASDAQHealth Care

Latest close: 0.76 USD · Oct 16, 2026 · 1 year · split-adjusted

On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account

End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.

Latest on record

The most recent facts, as filed.

Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.

  1. Aug 7, 2026Quarterly report · 10-QFiled by the company itself.Open the filing ↗
  2. Aug 7, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
  3. Jul 8, 2026Notice of sale · Form 144Wilson John J. Addington · Former Officer · $17.0KOpen the filing ↗

In numbers

What this profile holds, counted.

Closes · 1 year250
SEC filings on record2925 flagged findings
Reported transactions (Form 4)80since May 23, 2024
Corporate events (8-K)18since Sep 23, 2021

What the record says

Description, identity and filings, each with its source.

Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.

SEC record

SEC dossier

What this company has filed with the SEC, in plain language.

The 25 most recent filings (of 292)

Everything filed

Every SEC filing, newest first, with what it is. Below, each type with its own explanation.

  • Aug 14, 26SCHEDULE 13G/A ↗Passive stake · Bain Capital Life Sciences Fund, L.P. · 16.8% · event on Jun 30, 26 · amendment
  • Aug 14, 26SCHEDULE 13G ↗Passive stake · Armistice Capital, LLC · 7.3% · event on Jun 30, 26
  • Aug 7, 2610-Q ↗Quarterly report
  • Aug 7, 268-K ↗Current report · Results
  • Insider transaction · 2 Form 4 filingsshow all 2hide
  • Notice of proposed sale · 4 Form 144 filingsshow all 4hide
  • Insider transaction · 5 Form 4 filingsshow all 5hide
  • May 28, 268-K ↗Current report · Shareholder vote results
  • Insider transaction · 6 Form 4 filingsshow all 6hide
  • May 19, 268-K ↗Current report · Entered a material agreement
  • May 19, 26424B5 ↗Securities offering
  • May 19, 26424B5 ↗Securities offering

292 filings on record, the oldest from Apr 19, 21.

Listing the 25 most recent filings of the 292 on record.

8-Ks, explained

Stress4Structure7Governance7
  • May 19, 26StructureEntered a material agreement+1 more in the same filing8-K 1.01 ↗
  • Mar 27, 26GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
  • Aug 12, 25StructureEntered a material agreement+5 more in the same filing8-K 1.01 ↗
  • May 23, 25GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
  • Feb 27, 25StructureEntered a material agreement+2 more in the same filing8-K 1.01 ↗
  • Nov 1, 24GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • Stress3 listing notices2023 – 2024show all 3hide
    • Aug 2, 24StressListing notice (8-K 3.01)+2 more in the same filing8-K 3.01 ↗
    • Feb 2, 24StressListing notice (8-K 3.01)8-K 3.01 ↗
    • Sep 19, 23StressListing notice (8-K 3.01)8-K 3.01 ↗
  • Jul 18, 23GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • Aug 12, 22StressRestructuring plan with committed costs+7 more in the same filing8-K 2.05 ↗
  • Mar 29, 22GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Dec 23, 21GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
  • Sep 23, 21StructureA material agreement was terminated+1 more in the same filing8-K 1.02 ↗

Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.

Ownership and control

Schedule 13D: stake and stated purpose

Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.

Schedule 13G: short-form filing

The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.

  • Bain Capital Life Sciences Fund, L.P.16.8%Jun 30, 26SCHEDULE 13G/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
  • Longitude Capital Partners II, LLC8.6%Mar 31, 26SCHEDULE 13G/A ↗6 co-filers on this document — the figure is the largest single stake, not their sum.
  • Armistice Capital, LLC7.3%Jun 30, 26SCHEDULE 13G ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
  • Endeavour Medtech Growth II LP5.7%Dec 31, 25SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum.

Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.

Sale intention announced

On Jul 8, Wilson John J. Addington filed notice of intent to sell up to $17K. That is about 0.02% of shares outstanding.

A notice is not a sale: it may not go ahead, may happen in part, or at a different price.

The 90-day window closed with no sale of theirs on record in Form 4.

View notice (Form 144) ↗+2 more recent notices

SEC record

Insider transactions

Buys and sells reported by officers, directors and major shareholders on SEC Form 4.

Buys and sells

  • Mar 11, 26Sell$32KSEAN M WIRTJESCHIEF FINANCIAL OFFICER↗
  • Mar 11, 26Sell$41KJohn J. Addington WilsonCHIEF OPERATING OFFICER↗
  • Mar 10, 26Sell$74KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Feb 20, 26Sell$68KSEAN M WIRTJESCHIEF FINANCIAL OFFICER↗
  • Feb 20, 26Sell$21KJohn J. Addington WilsonCHIEF OPERATING OFFICER↗
  • Feb 19, 26Sell$149KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Feb 9, 26Sell$23KSEAN M WIRTJESCHIEF FINANCIAL OFFICER↗
  • Feb 9, 26Sell$49KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Feb 9, 26Sell$17KJohn J. Addington WilsonCHIEF OPERATING OFFICER↗
  • Feb 4, 26Sell$190KLongitude Capital Partners II, LLC↗
  • Feb 3, 26Sell$117KLongitude Capital Partners II, LLC↗
  • Feb 2, 26Sell$117KLongitude Capital Partners II, LLC↗

There are 3 more transactions in this stretch.

Stock compensation, tax and giftsshow the 25 other transactionshide

Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.

  • Jul 24, 26Compensation$1KRichard S Kollender↗
  • Jul 24, 26Compensation$1KRichard S Kollender↗
  • Jul 22, 26Compensation$1KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • May 29, 26Compensation$25KSEAN M WIRTJESCHIEF FINANCIAL OFFICER↗
  • May 29, 26Compensation$25KKirk Malloy↗
  • May 29, 26Compensation$25KMELINDA LITHERLAND PEI↗
  • May 29, 26Compensation$25KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • May 29, 26Compensation$25KINESE LOWENSTEIN↗
  • May 21, 26Compensationamount n/aKirk Malloy↗
  • May 21, 26Compensationamount n/aRichard S Kollender↗
  • May 21, 26Compensationamount n/aMELINDA LITHERLAND PEI↗
  • May 21, 26Compensationamount n/aINESE LOWENSTEIN↗
  • May 21, 26Compensationamount n/aDafni Bika↗
  • Feb 27, 26Compensation$632NATALE S RICCIARDI↗
  • Feb 11, 26Compensationamount n/aRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Feb 11, 26Compensationamount n/aSEAN M WIRTJESCHIEF FINANCIAL OFFICER↗
  • Feb 11, 26Compensationamount n/aJohn J. Addington WilsonCHIEF OPERATING OFFICER↗
  • Jan 23, 26Other$31KLongitude Capital Partners II, LLC↗
  • Nov 14, 25Giftamount n/aKirk Malloy↗
  • Oct 17, 25Compensation$3KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Oct 17, 25Tax$6KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Oct 17, 25Compensation$6KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Oct 17, 25Tax$15KRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Jul 14, 25Compensationamount n/aRobert G. Spignesi Jr.PRESIDENT AND CEO↗
  • Jul 11, 25Compensationamount n/aRobert G. Spignesi Jr.PRESIDENT AND CEO↗

The full record holds 113 transactions and goes back to Feb 13, 23.

Its sector and its market

Rapid Micro Biosystems, Inc. among Health Care companies

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Coverage

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Where each figure comes from and how far it reaches.

Prices
End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
Series quality
250 clean closes in the period.
SEC records
292 documents on file, from Apr 19, 2021 to Aug 14, 2026.
Company description
No description available.
This page
Generated on Oct 19, 2026; refreshed through the day.

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Which SEC documents appear here?

Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.

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It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.

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