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

Rainer M. Erdtmann

CIK 0001455767. 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

03 Apr 2026

Industry

n/a

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Start with the summary below, then verify the strongest source-backed page for this filer.

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 03 Apr 2026 for CIK 0001455767.

View Source Filing

Business address: C/O Biomea Fusion, Inc., 900 Middlefield Road 4 Th Floor, Redwood City, CA, 94063
Top holdings (ownership): BMEA
Top holdings (Schedule 13G): BMEA

Filer intelligence

What SEC filings say about Rainer M. Erdtmann

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

1 recent 13D/G stake row found; top row is BMEA at 3.9% ownership.
Forms 3/4/5 show insider context for BMEA worth $2.29M.

SEC source mix

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

XML parsed

13F portfolio No rows yet

Quarterly institutional portfolio holdings.

Open

13D/G stakes 1 rows

Beneficial ownership and large-stake disclosures.

Open

Forms 3/4/5 1 rows

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

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13D/G large-stake context

BMEA

31 Dec 2025 · Common Stock, $0.0001 par value

3.9%

Issuer page 13D/G history

Forms 3/4/5 insider context

BMEA

01 Apr 2026 · See Remarks

$2.29M

Issuer page Owner page

Latest update

What changed recently for Rainer M. Erdtmann

Ownership report updated

Latest ownership report period: 01 Apr 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

03 Apr 2026

Page type

Ownership filings

Latest period

01 Apr 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 03 Apr 2026.

Open ownership filings Browse recent public updates

Filer Overview

Rainer M. Erdtmann has filed 46 SEC EDGAR filings since 09 Feb 2009. Common forms include 4, SCHEDULE 13G/A, 5, SC 13G/A and more.

Rainer M. Erdtmann SEC filings Rainer M. Erdtmann 13D/G history Rainer M. Erdtmann owner filings

Latest Filings

Recent SEC filings for Rainer M. Erdtmann with direct links to document and filing folders.

4 File 001-40335

4

Filing date: 03 Apr 2026
Reporting date: 01 Apr 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date: 06 Feb 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 001-40335

5

Filing date: 06 Feb 2026
Reporting date: 31 Dec 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

4

Filing date: 15 Dec 2025
Reporting date: 11 Dec 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

4

Filing date: 02 Dec 2025
Reporting date: 28 Nov 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date: 13 Aug 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

4

Filing date: 13 Aug 2025
Reporting date: 28 Jan 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

SC 13G/A

Filing date: 12 Feb 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

4

Filing date: 18 Jan 2024
Reporting date: 17 Jan 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

4

Filing date: 03 Jan 2024
Reporting date: 29 Dec 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

SC 13G/A

Filing date: 10 Feb 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 001-40335

FORM 5 SUBMISSION

Filing date: 10 Feb 2023
Reporting date: 31 Dec 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-40335

FORM 4/A SUBMISSION

Filing date: 10 Feb 2023
Reporting date: 15 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

FORM 4 SUBMISSION

Filing date: 10 Jan 2023
Reporting date: 06 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

SC 13G

Filing date: 11 Feb 2022
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

FORM 4

Filing date: 07 Dec 2021
Reporting date: 04 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

FORM 4

Filing date: 25 Aug 2021
Reporting date: 23 Aug 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40335

FORM 4

Filing date: 19 Aug 2021
Reporting date: 15 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-40335

FORM 3 SUBMISSION

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

4 File 001-36866

OWNERSHIP DOCUMENT

Filing date: 23 Feb 2021
Reporting date: 19 Feb 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-36866

FORM 3 SUBMISSION

Filing date: 18 Sep 2020
Reporting date: 18 Sep 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-32404

4 filing

Filing date: 06 Jan 2020
Reporting date: 02 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-32404

4 filing

Filing date: 17 Dec 2019
Reporting date: 16 Dec 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51128

4 filing

Filing date: 19 Aug 2019
Reporting date: 16 Aug 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51128

4 filing

Filing date: 17 Apr 2019
Reporting date: 31 Mar 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51128

4 filing

Filing date: 05 Nov 2018
Reporting date: 01 Nov 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-51128

4 filing

Filing date: 18 Sep 2018
Reporting date: 14 Sep 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3/A File 000-51128

3/A filing

Filing date: 21 Aug 2018
Reporting date: 07 Aug 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-51128

3 filing

Filing date: 20 Aug 2018
Reporting date: 07 Aug 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

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

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 04 Apr 2014
Reporting date: 02 Apr 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 16 Dec 2013
Reporting date: 13 Dec 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 01 May 2013
Reporting date: 30 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 000-26658

FORM 5 SUBMISSION

Filing date: 07 Jan 2013
Reporting date: 31 Dec 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 18 Dec 2012
Reporting date: 17 Dec 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 02 Nov 2012
Reporting date: 31 Oct 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 02 May 2012
Reporting date: 30 Apr 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 06 Dec 2011
Reporting date: 02 Dec 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 02 Nov 2011
Reporting date: 31 Oct 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 03 May 2011
Reporting date: 29 Apr 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 02 Nov 2010
Reporting date: 29 Oct 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

Filing date: 15 Oct 2010
Reporting date: 13 Oct 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-26658

FORM 4 SUBMISSION

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

About this filer

Rainer M. Erdtmann files with the SEC under CIK 0001455767. 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.

Rainer M. Erdtmann

Follow future filing-backed changes

What SEC filings say about Rainer M. Erdtmann

Quick read

SEC source mix

13D/G large-stake context

Forms 3/4/5 insider context

What changed recently for Rainer M. Erdtmann

Filer Overview

Latest Filings

4

SCHEDULE 13G/A filing

5

4

4

SCHEDULE 13G/A filing

4

SC 13G/A

4

4

SC 13G/A

FORM 5 SUBMISSION

FORM 4/A SUBMISSION

FORM 4 SUBMISSION

SC 13G

FORM 4

FORM 4

FORM 4

FORM 3 SUBMISSION

OWNERSHIP DOCUMENT

FORM 3 SUBMISSION

4 filing

4 filing

4 filing

4 filing

4 filing

4 filing

3/A filing

3 filing

FORM 4 SUBMISSION

FORM 4 SUBMISSION

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

About this filer

FAQ

Related pages for Rainer M. Erdtmann