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

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

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Updates follow new EDGAR submissions and periodic data refreshes.

Filer Snapshot

Michael Waterman

CIK 0001851495. 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

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: Forms 3/4/5 owner position for ACVA. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Latest 13F portfolio

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13D/G large stake

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Insider / owner context

ACVA

01 Apr 2026 · $13.44M

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Source: SEC Forms 3/4/5

4 filed on 03 Apr 2026 for CIK 0001851495.

View Source Filing

Business address: C/O Acv Auctions Inc., 640 Ellicott Street, #321, Buffalo, NY, 14203
Filing-backed coverage: Insider holdings value
$13.44M
Parsed Forms 3/4/5 holdings where value can be estimated.
Top ownership positions: ACVA

Filer intelligence

What SEC filings say about Michael Waterman

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 ACVA worth $13.44M.

SEC source mix

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

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13F portfolio No rows yet

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13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 1 rows

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

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Forms 3/4/5 insider context

ACVA

01 Apr 2026 · Chief Sales Officer

$13.44M

Issuer page Owner page

Latest update

What changed recently for Michael Waterman

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.

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SEC filing record

CIK 0001851495 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings

First seen

23 Mar 2021

Latest filing

03 Apr 2026

Entity

Individual

Observed form types

4 144 3

Primary evidence

Open SEC filing index Michael Waterman SEC filings Michael Waterman owner filings

Latest Filings

Showing the latest 12 of 71 SEC filings for Michael Waterman.

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4 File 001-40256

FORM 4

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

4 File 001-40256

FORM 4

Filing date: 02 Mar 2026
Reporting date: 26 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40256

FORM 4

Filing date: 06 Jan 2026
Reporting date: 02 Jan 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40256

FORM 4

Filing date: 03 Oct 2025
Reporting date: 01 Oct 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40256

FORM 4

Filing date: 09 Jul 2025
Reporting date: 08 Jul 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 08 Jul 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40256

FORM 4

Filing date: 03 Jul 2025
Reporting date: 01 Jul 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40256

FORM 4

Filing date: 12 Jun 2025
Reporting date: 10 Jun 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 10 Jun 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40256

FORM 4

Filing date: 15 May 2025
Reporting date: 28 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

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

4 File 001-40256

FORM 4

Filing date: 04 Apr 2025
Reporting date: 02 Apr 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

Michael Waterman

Start with the SEC data that changes for this CIK

What SEC filings say about Michael Waterman

Quick read

SEC source mix

Forms 3/4/5 insider context

What changed recently for Michael Waterman

CIK 0001851495 filing coverage

Latest Filings

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

144 filing

FORM 4

FORM 4

144 filing

FORM 4

144 filing

FORM 4

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