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

Chen Schor

CIK 0001340875. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

Latest Filing

26 May 2026

Industry

n/a

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Open 13F if you want portfolio holdings.
Open 13D/G or insider pages only when this CIK has those rows.

Open reporting owner context

Source: SEC Forms 3/4/5

4 filed on 26 May 2026 for CIK 0001340875.

View Source Filing

Business address: C/O Karyopharm Therapeutics Inc., 85 Wells Avenue, 2 Nd Floor, Newton, MA, 02459
Top holdings (ownership): KPTI and ACET

Filer intelligence

What SEC filings say about Chen Schor

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

Forms 3/4/5 show insider context for KPTI worth $86.4K.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed

13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

Open

Forms 3/4/5 2 rows

Officer, director, and 10% owner holdings or transactions.

Open

Forms 3/4/5 insider context

KPTI

21 May 2026

$86.4K

Issuer page Owner page

ACET

25 Mar 2026 · President & CEO

$59.3K

Issuer page Owner page

Latest update

What changed recently for Chen Schor

Ownership report updated

Latest ownership report period: 21 May 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

26 May 2026

Page type

Ownership filings

Latest period

21 May 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 26 May 2026.

Open ownership filings Browse recent public updates

Filer Overview

Chen Schor has filed 75 SEC EDGAR filings since 18 Aug 2006. Common forms include 4, 144, 5, 4/A and more.

Chen Schor SEC filings Chen Schor owner filings

Latest Filings

Recent SEC filings for Chen Schor with direct links to document and filing folders.

4 File 001-36167

4

Filing date: 26 May 2026
Reporting date: 21 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

4

Filing date: 27 Mar 2026
Reporting date: 25 Mar 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

4

Filing date: 27 Jan 2026
Reporting date: 24 Jan 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36167

4

Filing date: 29 May 2025
Reporting date: 28 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

4

Filing date: 04 Feb 2025
Reporting date: 31 Jan 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

4

Filing date: 28 Jan 2025
Reporting date: 24 Jan 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

4

Filing date: 07 Jun 2024
Reporting date: 05 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36167

4

Filing date: 30 May 2024
Reporting date: 29 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

4

Filing date: 26 Jan 2024
Reporting date: 24 Jan 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 02 Oct 2023
Reporting date: 28 Sep 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 29 Sep 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

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

4 File 001-36167

FORM 4 SUBMISSION

Filing date: 25 May 2023
Reporting date: 24 May 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 001-38359

FORM 5 SUBMISSION

Filing date: 14 Feb 2023
Reporting date: 31 Dec 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 26 Jan 2023
Reporting date: 24 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 15 Nov 2022
Reporting date: 10 Nov 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 09 Nov 2022
Reporting date: 07 Nov 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 04 Nov 2022
Reporting date: 02 Nov 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 04 Oct 2022
Reporting date: 04 Oct 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 16 Sep 2022
Reporting date: 14 Sep 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 13 Sep 2022
Reporting date: 09 Sep 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 08 Aug 2022
Reporting date: 04 Aug 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36167

FORM 4 SUBMISSION

Filing date: 20 May 2022
Reporting date: 19 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 16 Feb 2022
Reporting date: 14 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 01 Feb 2022
Reporting date: 28 Jan 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 11 Jan 2022
Reporting date: 07 Jan 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 05 Oct 2021
Reporting date: 01 Oct 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 21 Jun 2021
Reporting date: 16 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 07 Jun 2021
Reporting date: 03 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36167

FORM 4 SUBMISSION

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

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 21 May 2021
Reporting date: 19 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 07 May 2021
Reporting date: 05 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 22 Apr 2021
Reporting date: 20 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 08 Apr 2021
Reporting date: 06 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 01 Apr 2021
Reporting date: 30 Mar 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-38359

FORM 4/A SUBMISSION

Filing date: 01 Apr 2021
Reporting date: 16 Mar 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-38359

FORM 4/A SUBMISSION

Filing date: 01 Apr 2021
Reporting date: 23 Oct 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 18 Mar 2021
Reporting date: 16 Mar 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 17 Feb 2021
Reporting date: 12 Feb 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 15 Jan 2021
Reporting date: 13 Jan 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36167

FORM 4 SUBMISSION

Filing date: 30 Nov 2020
Reporting date: 25 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-36167

FORM 3 SUBMISSION

Filing date: 30 Nov 2020
Reporting date: 25 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 27 Oct 2020
Reporting date: 23 Oct 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

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

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 06 Dec 2019
Reporting date: 06 Dec 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

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

4 File 001-36641

OWNERSHIP DOCUMENT

Filing date: 21 Dec 2018
Reporting date: 24 Oct 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 17 Dec 2018
Reporting date: 06 Jul 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36641

OWNERSHIP DOCUMENT

Filing date: 30 Nov 2018
Reporting date: 30 Nov 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 17 Apr 2018
Reporting date: 16 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 12 Apr 2018
Reporting date: 11 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38359

FORM 4 SUBMISSION

Filing date: 11 Apr 2018
Reporting date: 10 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38359

FORM 3 SUBMISSION

Filing date: 25 Jan 2018
Reporting date: 25 Jan 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36641

OWNERSHIP DOCUMENT

Filing date: 13 Nov 2017
Reporting date: 10 Nov 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33277

FORM 4 -

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

4 File 001-33277

FORM 4 -

Filing date: 06 Oct 2015
Reporting date: 02 Oct 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33277

4

Filing date: 18 Sep 2015
Reporting date: 16 Sep 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33277

FORM 4 -

Filing date: 08 Jun 2015
Reporting date: 05 Jun 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36641

OWNERSHIP DOCUMENT

Filing date: 05 May 2015
Reporting date: 03 May 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33277

FORM 4 -

Filing date: 10 Dec 2014
Reporting date: 08 Dec 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-33277

FORM 3 -

Filing date: 10 Dec 2014
Reporting date: 08 Dec 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 000-54365

OWNERSHIP DOCUMENT

Filing date: 16 Nov 2011
Reporting date: 21 Oct 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-54365

OWNERSHIP DOCUMENT

Filing date: 23 Aug 2011
Reporting date: 22 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-54365

OWNERSHIP DOCUMENT

Filing date: 23 Aug 2011
Reporting date: 22 Aug 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

Chen Schor files with the SEC under CIK 0001340875. 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.

Chen Schor

Follow future filing-backed changes

What SEC filings say about Chen Schor

Quick read

SEC source mix

Forms 3/4/5 insider context

What changed recently for Chen Schor

Filer Overview

Latest Filings

4

4

4

4

4

4

4

4

4

FORM 4 SUBMISSION

144 filing

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 5 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4/A SUBMISSION

FORM 4/A SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 3 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

OWNERSHIP DOCUMENT

FORM 4 SUBMISSION

OWNERSHIP DOCUMENT

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 3 SUBMISSION

OWNERSHIP DOCUMENT

FORM 4 -

FORM 4 -

4

FORM 4 -

OWNERSHIP DOCUMENT

FORM 4 -

FORM 3 -

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

About this filer

FAQ

Related pages for Chen Schor