A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.

Why are some filings missing?

New filings appear as the SEC updates EDGAR, and older records can vary by availability.

How often is this page updated?

Updates follow new EDGAR submissions and periodic data refreshes.

Filer Snapshot

Robert Langer SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001239757.

Entity Type

Individual

Total Filings

133

Latest Filing

09 Jul 2025

Industry

n/a

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Go to latest filings table Open reporting owner context

Source: SEC Forms 3/4/5

4 filed on 09 Jul 2025 for CIK 0001239757.

View Source Filing

Business address: 98 Montvale Rd, Newton, MA, 02459
Top holdings (ownership): SEER

Key facts

Robert Langer is an SEC filer tracked under CIK 0001239757.
133 filings are listed on this profile.
Common form coverage includes 4, 5, 3 and more.

Change

Latest filing: 4 filed on 09 Jul 2025.
Report period: 07 Jul 2025.

Research use

You can quote filing dates and form types directly from the SEC record on this page.
Use this profile before deeper ownership or insider analysis to confirm filing history context.

Evidence

Source: SEC Forms 3/4/5

4 filed on 09 Jul 2025 for CIK 0001239757.

View Source Filing

Return Loop

Why revisit this filer page

A newly filed 4 can change the filing history, ownership context, or next research path for Robert Langer.

Latest source-backed update: 4 filed 09 Jul 2025
Why come back: Revisit after a new SEC filing appears to compare the updated record with prior filings.

Latest filing on record: 4 filed 09 Jul 2025.
Save this filer if you want a stable place to return after the next filing cycle.
Open the latest filing table or ownership context to verify what changed.

Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

Jump to save and follow actions Open latest filings table

Latest update

What changed recently for Robert Langer

Ownership report updated

Latest ownership report period: 07 Jul 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

09 Jul 2025

Page type

Ownership filings

Latest period

07 Jul 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 09 Jul 2025.

Open ownership filings Browse recent public updates

Filer Overview

Robert Langer has filed 133 SEC EDGAR filings since 09 Jun 2003. Common forms include 4, 5, 3, SC 13D and more.

Robert Langer SEC filings Robert Langer owner filings

Latest Filings

Recent SEC filings for Robert Langer with direct links to document and filing folders.

4 File 001-39747

4 filing

Filing date: 09 Jul 2025
Reporting date: 07 Jul 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39747

4 filing

Filing date: 14 Jun 2024
Reporting date: 12 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38753

PRIMARY DOCUMENT

Filing date: 07 May 2024
Reporting date: 06 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39747

FORM 4 SUBMISSION

Filing date: 16 Jun 2023
Reporting date: 14 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38753

PRIMARY DOCUMENT

Filing date: 05 May 2023
Reporting date: 03 May 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 001-38753

PRIMARY DOCUMENT

Filing date: 03 Feb 2023
Reporting date: 31 Dec 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39062

PRIMARY DOCUMENT

Filing date: 19 Aug 2022
Reporting date: 17 Aug 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39062

PRIMARY DOCUMENT

Filing date: 23 Jun 2022
Reporting date: 21 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39747

FORM 4 SUBMISSION

Filing date: 17 Jun 2022
Reporting date: 15 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38753

PRIMARY DOCUMENT

Filing date: 02 May 2022
Reporting date: 28 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39747

FORM 4 SUBMISSION

Filing date: 12 Jan 2022
Reporting date: 10 Jan 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39747

FORM 4 SUBMISSION

Filing date: 22 Jun 2021
Reporting date: 17 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39062

PRIMARY DOCUMENT

Filing date: 21 Jun 2021
Reporting date: 17 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38753

PRIMARY DOCUMENT

Filing date: 30 Apr 2021
Reporting date: 28 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39747

FORM 4

Filing date: 11 Dec 2020
Reporting date: 03 Dec 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39747

FORM 4

Filing date: 09 Dec 2020
Reporting date: 08 Dec 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-39747

FORM 3

Filing date: 03 Dec 2020
Reporting date: 03 Dec 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39062

PRIMARY DOCUMENT

Filing date: 19 Nov 2020
Reporting date: 17 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-39662

FORM 3 SUBMISSION

Filing date: 29 Oct 2020
Reporting date: 29 Oct 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39062

PRIMARY DOCUMENT

Filing date: 12 Jun 2020
Reporting date: 11 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39273

FORM 4 SUBMISSION

Filing date: 06 May 2020
Reporting date: 05 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-39273

FORM 4 SUBMISSION

Filing date: 01 May 2020
Reporting date: 30 Apr 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-39273

FORM 3 SUBMISSION

Filing date: 30 Apr 2020
Reporting date: 30 Apr 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38753

PRIMARY DOCUMENT

Filing date: 30 Apr 2020
Reporting date: 29 Apr 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38586

4

Filing date: 17 Oct 2019
Reporting date: 14 Oct 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-39062

FORM 3 SUBMISSION

Filing date: 02 Oct 2019
Reporting date: 02 Oct 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38586

4

Filing date: 17 Jul 2019
Reporting date: 15 Jul 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38753

PRIMARY DOCUMENT

Filing date: 28 Jun 2019
Reporting date: 27 Jun 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38586

4

Filing date: 28 May 2019
Reporting date: 23 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38586

4

Filing date: 17 Apr 2019
Reporting date: 15 Apr 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38586

4

Filing date: 18 Jan 2019
Reporting date: 14 Jan 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38753

FORM 4 SUBMISSION

Filing date: 13 Dec 2018
Reporting date: 11 Dec 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38753

FORM 3 SUBMISSION

Filing date: 07 Dec 2018
Reporting date: 07 Dec 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38586

4

Filing date: 18 Jul 2018
Reporting date: 17 Jul 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38586

3

Filing date: 17 Jul 2018
Reporting date: 17 Jul 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38150

FORM 4 -

Filing date: 15 Jun 2018
Reporting date: 12 Jun 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38486

FORM 3 SUBMISSION

Filing date: 10 May 2018
Reporting date: 10 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38150

FORM 4 -

Filing date: 21 Jul 2017
Reporting date: 19 Jul 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38150

FORM 3 -

Filing date: 19 Jul 2017
Reporting date: 19 Jul 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36072

FORM 4 SUBMISSION

Filing date: 30 Aug 2016
Reporting date: 26 Aug 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36072

FORM 4 SUBMISSION

Filing date: 22 Jun 2016
Reporting date: 21 Jun 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-37798

3

Filing date: 21 Jun 2016
Reporting date: 21 Jun 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36855

4

Filing date: 11 Feb 2016
Reporting date: 10 Feb 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36855

FORM 4 -

Filing date: 04 Jan 2016
Reporting date: 31 Dec 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36855

FORM 4 -

Filing date: 01 Oct 2015
Reporting date: 30 Sep 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36855

FORM 4 -

Filing date: 02 Jul 2015
Reporting date: 30 Jun 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36072

LANGER F4

Filing date: 10 Jun 2015
Reporting date: 09 Jun 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36855

FORM 4 -

Filing date: 01 Apr 2015
Reporting date: 31 Mar 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4 -

Filing date: 05 Jan 2015
Reporting date: 02 Jan 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4 -

Filing date: 02 Jan 2015
Reporting date: 31 Dec 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4 -

Filing date: 01 Oct 2014
Reporting date: 30 Sep 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4 -

Filing date: 02 Jul 2014
Reporting date: 30 Jun 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36072

LANGER F4 5-28-14

Filing date: 29 May 2014
Reporting date: 28 May 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4 -

Filing date: 02 Apr 2014
Reporting date: 31 Mar 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4 -

Filing date: 03 Jan 2014
Reporting date: 31 Dec 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4

Filing date: 02 Oct 2013
Reporting date: 30 Sep 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-36072

MAIN DOCUMENT DESCRIPTION

Filing date: 19 Sep 2013
Reporting date: 19 Sep 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4

Filing date: 01 Jul 2013
Reporting date: 28 Jun 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 05 Jun 2013
Reporting date: 03 Jun 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 31 May 2013
Reporting date: 29 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 28 May 2013
Reporting date: 23 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 22 May 2013
Reporting date: 20 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 17 May 2013
Reporting date: 15 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 14 May 2013
Reporting date: 10 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 09 May 2013
Reporting date: 07 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 06 May 2013
Reporting date: 02 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 01 May 2013
Reporting date: 29 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 26 Apr 2013
Reporting date: 24 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4

Filing date: 01 Apr 2013
Reporting date: 28 Mar 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4

Filing date: 26 Feb 2013
Reporting date: 02 Jan 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 17 Jan 2013
Reporting date: 15 Jan 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORN 4

Filing date: 04 Jan 2013
Reporting date: 31 Dec 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FROM 4

Filing date: 03 Oct 2012
Reporting date: 28 Sep 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

OWNERSHIP DOCUMENT

Filing date: 09 Aug 2012
Reporting date: 03 Jan 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

FORM 4

Filing date: 10 Jul 2012
Reporting date: 29 Jun 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 02 Jul 2012
Reporting date: 29 Jun 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 28 Jun 2012
Reporting date: 26 Jun 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 17 Apr 2012
Reporting date: 13 Apr 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

OWNERSHIP DOCUMENT

Filing date: 03 Apr 2012
Reporting date: 30 Mar 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-50295

OWNERSHIP DOCUMENT

Filing date: 24 Feb 2012
Reporting date: 04 Oct 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-50295

OWNERSHIP DOCUMENT

Filing date: 24 Feb 2012
Reporting date: 04 Oct 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-52089

MAIN DOCUMENT DESCRIPTION

Filing date: 03 Jan 2012
Reporting date: 29 Dec 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-31564

MAIN DOCUMENT DESCRIPTION

Filing date: 18 Jan 2011
Reporting date: 14 Jan 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-52089

3 filing

Filing date: 01 Nov 2010
Reporting date: 26 Oct 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

SC 13D

SC 13D filing

Filing date: 01 Nov 2010
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09781

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filing date: 16 Jul 2010
Reporting date: 14 Jul 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09781

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filing date: 13 May 2010
Reporting date: 11 May 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-23017

PRIMARY DOCUMENT

Filing date: 30 Apr 2010
Reporting date: 11 Dec 2009
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

Robert Langer files with the SEC under CIK 0001239757. This page aggregates EDGAR filings and related ownership activity.

FAQ

What is a CIK?: A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?: New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?: Updates follow new EDGAR submissions and periodic data refreshes.