Filer Snapshot

Leonard S. Schleifer SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001218629.

Entity Type

Individual

Total Filings

72

Latest Filing

05 Jan 2026

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 05 Jan 2026 for CIK 0001218629.

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Business address
777 Old Saw Mill River Road, Tarrytown, NY, 10591
Top holdings (ownership)
REGN

Quick Takeaways

  • Leonard S. Schleifer is an SEC filer tracked under CIK 0001218629.
  • 72 filings are listed on this profile.
  • Common form coverage includes 4, 144, SC 13G/A and more.

What Changed

  • Latest filing: 4 filed on 05 Jan 2026.
  • Report period: 31 Dec 2025.

Why This Matters

  • 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.

Source Evidence

Source: SEC Forms 3/4/5

4 filed on 05 Jan 2026 for CIK 0001218629.

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Return Loop

Why revisit this filer page

A newly filed 4 can change the filing history, ownership context, or next research path for Leonard S. Schleifer.

Latest source-backed update
4 filed 05 Jan 2026
Why come back
Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: 4 filed 05 Jan 2026.
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Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

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Latest update

What changed recently for Leonard S. Schleifer

Ownership report updated

Latest ownership report period: 31 Dec 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

05 Jan 2026

Page type

Ownership filings

Latest period

31 Dec 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 05 Jan 2026.

Open ownership filings Browse recent public updates

Filer Overview

Leonard S. Schleifer has filed 72 SEC EDGAR filings since 13 Feb 2003. Common forms include 4, 144, SC 13G/A, 5 and more.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Leonard S. Schleifer with direct links to document and filing folders.

4 File 000-19034

PRIMARY DOCUMENT

Filing date
05 Jan 2026
Reporting date
31 Dec 2025
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
11 Dec 2025
Reporting date
09 Dec 2025
SEC evidence
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4 File 000-19034

OWNERSHIP DOCUMENT

Filing date
13 Jun 2024
Reporting date
11 Jun 2024
SEC evidence
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144

144 filing

Filing date
12 Jun 2024
Reporting date
Not listed
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
10 Jun 2024
Reporting date
06 Jun 2024
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144

144 filing

Filing date
06 Jun 2024
Reporting date
Not listed
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
17 May 2024
Reporting date
17 May 2024
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
15 May 2024
Reporting date
13 May 2024
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144

144 filing

Filing date
14 May 2024
Reporting date
Not listed
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
13 Dec 2023
Reporting date
11 Dec 2023
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
17 May 2023
Reporting date
15 May 2023
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
07 Apr 2022
Reporting date
05 Apr 2022
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
04 Apr 2022
Reporting date
31 Mar 2022
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
19 Nov 2021
Reporting date
19 Nov 2021
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
20 Aug 2021
Reporting date
18 Aug 2021
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
17 Aug 2021
Reporting date
16 Aug 2021
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
10 Aug 2021
Reporting date
06 Aug 2021
SEC evidence
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4 File 000-19034

OWNERSHIP DOCUMENT

Filing date
05 Jan 2021
Reporting date
31 Dec 2020
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
13 May 2020
Reporting date
11 May 2020
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
13 Dec 2019
Reporting date
11 Dec 2019
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
22 Mar 2019
Reporting date
21 Mar 2019
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
14 Dec 2018
Reporting date
12 Dec 2018
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
13 Dec 2017
Reporting date
12 Dec 2017
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
19 Dec 2016
Reporting date
15 Dec 2016
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
18 Dec 2015
Reporting date
16 Dec 2015
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
03 Sep 2015
Reporting date
02 Sep 2015
SEC evidence
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4 File 000-19034

FORM 4 SUBMISSION

Filing date
05 Jan 2015
Reporting date
02 Jan 2015
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
18 Dec 2014
Reporting date
16 Dec 2014
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
12 Nov 2014
Reporting date
11 Nov 2014
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
04 Nov 2014
Reporting date
31 Oct 2014
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
29 Oct 2014
Reporting date
27 Oct 2014
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
17 Dec 2013
Reporting date
13 Dec 2013
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
03 Oct 2013
Reporting date
01 Oct 2013
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
20 Sep 2013
Reporting date
18 Sep 2013
SEC evidence
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4 File 000-19034

MAIN DOCUMENT DESCRIPTION

Filing date
11 Sep 2013
Reporting date
09 Sep 2013
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
03 May 2013
Reporting date
01 May 2013
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
21 Mar 2013
Reporting date
19 Mar 2013
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
15 Mar 2013
Reporting date
13 Mar 2013
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
07 Mar 2013
Reporting date
05 Mar 2013
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
17 Dec 2012
Reporting date
14 Dec 2012
SEC evidence
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4 File 000-19034

MAIN DOCUMENT DESCRIPTION

Filing date
19 Nov 2012
Reporting date
16 Nov 2012
SEC evidence
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4 File 000-19034

MAIN DOCUMENT DESCRIPTION

Filing date
02 May 2012
Reporting date
01 May 2012
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
15 Feb 2012
Reporting date
14 Feb 2012
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
20 Dec 2011
Reporting date
17 Dec 2008
SEC evidence
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4 File 000-19034

MAIN DOCUMENT DESCRIPTION

Filing date
08 Sep 2011
Reporting date
06 Sep 2011
SEC evidence
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4 File 000-19034

PRIMARY DOCUMENT

Filing date
20 Dec 2010
Reporting date
14 Dec 2010
SEC evidence
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Next action
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About this filer

Leonard S. Schleifer files with the SEC under CIK 0001218629. 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.
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