Filer Snapshot

Michael Landsittel

CIK 0001651036. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

31

Latest Filing

25 Mar 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 25 Mar 2026 for CIK 0001651036.

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Business address
Blueprint Medicines Corp., 214 First Street, Suite 340/350, Cambridge, MA, 02142
Top holdings (ownership)
BPMC

Filer intelligence

What SEC filings say about Michael Landsittel

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 BPMC worth $793.1K.

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.

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Forms 3/4/5 2 rows

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

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Forms 3/4/5 insider context

BPMC

17 Jul 2025 ยท Chief Financial Officer

$793.1K
Issuer page Owner page

DMRA

23 Mar 2026

Issuer page Owner page

Latest update

What changed recently for Michael Landsittel

Ownership report updated

Latest ownership report period: 23 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

25 Mar 2026

Page type

Ownership filings

Latest period

23 Mar 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 25 Mar 2026.

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Filer Overview

Michael Landsittel has filed 31 SEC EDGAR filings since 19 Aug 2015. Common forms include 4, 3, 144.

Michael Landsittel SEC filings Michael Landsittel owner filings

Latest Filings

Recent SEC filings for Michael Landsittel with direct links to document and filing folders.

4 File 001-39655

4

Filing date
25 Mar 2026
Reporting date
23 Mar 2026
SEC evidence
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3 File 001-39655

3

Filing date
25 Mar 2026
Reporting date
23 Mar 2026
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4 File 001-37359

OWNERSHIP DOCUMENT

Filing date
21 Jul 2025
Reporting date
17 Jul 2025
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4 File 001-37359

4 filing

Filing date
07 Mar 2025
Reporting date
05 Mar 2025
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4 File 001-37359

4 filing

Filing date
04 Mar 2025
Reporting date
01 Mar 2025
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4 File 001-37359

4 filing

Filing date
19 Aug 2024
Reporting date
15 Aug 2024
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144

144 filing

Filing date
15 Aug 2024
Reporting date
Not listed
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4 File 001-37359

4 filing

Filing date
17 May 2024
Reporting date
15 May 2024
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144

144 filing

Filing date
15 May 2024
Reporting date
Not listed
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4 File 001-37359

4 filing

Filing date
10 May 2024
Reporting date
08 May 2024
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4 File 001-37359

4 filing

Filing date
06 May 2024
Reporting date
02 May 2024
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144

144 filing

Filing date
02 May 2024
Reporting date
Not listed
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4 File 001-37359

4 filing

Filing date
01 Apr 2024
Reporting date
28 Mar 2024
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144

144 filing

Filing date
28 Mar 2024
Reporting date
Not listed
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4 File 001-37359

4 filing

Filing date
19 Mar 2024
Reporting date
15 Mar 2024
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144

144 filing

Filing date
15 Mar 2024
Reporting date
Not listed
SEC evidence
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4 File 001-37359

4 filing

Filing date
11 Mar 2024
Reporting date
07 Mar 2024
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4 File 001-37359

4 filing

Filing date
06 Mar 2024
Reporting date
01 Mar 2024
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4 File 001-37359

4 filing

Filing date
08 Mar 2023
Reporting date
06 Mar 2023
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4 File 001-37359

4 filing

Filing date
03 Mar 2023
Reporting date
01 Mar 2023
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4 File 001-37359

4 filing

Filing date
08 Mar 2022
Reporting date
03 Mar 2022
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4 File 001-37359

4 filing

Filing date
03 Mar 2022
Reporting date
01 Mar 2022
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4 File 001-37359

FORM 4 -

Filing date
05 Mar 2021
Reporting date
04 Mar 2021
SEC evidence
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4 File 001-37359

FORM 4 -

Filing date
03 Mar 2021
Reporting date
01 Mar 2021
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4 File 001-37359

FORM 4 -

Filing date
11 Mar 2020
Reporting date
09 Mar 2020
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4 File 001-37359

FORM 4 -

Filing date
03 Mar 2020
Reporting date
01 Mar 2020
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4 File 001-37359

FORM 4 -

Filing date
05 Mar 2019
Reporting date
01 Mar 2019
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4 File 001-37359

FORM 4 -

Filing date
20 Feb 2018
Reporting date
16 Feb 2018
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4 File 001-37359

FORM 4 -

Filing date
21 Feb 2017
Reporting date
16 Feb 2017
SEC evidence
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4 File 001-37359

FORM 4 -

Filing date
05 Feb 2016
Reporting date
03 Feb 2016
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3 File 001-37359

3

Filing date
19 Aug 2015
Reporting date
11 Aug 2015
SEC evidence
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About this filer

Michael Landsittel files with the SEC under CIK 0001651036. 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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