Filer Snapshot

William A. Ackman

CIK 0001056513. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Individual

Total filings

26

Latest filing

14 Aug 2026

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13D/G stake for PS. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

Open 13D/G history Save page

Largest parsed holding

—

Populates from the latest parsed 13F information table.

Open holding

13D/G large stake

PS

30 Jun 2026 · 45% ownership

Open 13D/G

Save this filer page

Create a free account to keep this page in your watchlists. After verification, we will save it automatically and open your saved research list.

Create free account and save this filer Already have an account? Sign in and save it
Source: SEC Schedule 13D/G

SCHEDULE 13G filed on 14 Aug 2026 for CIK 0001056513.

View source filing
Ownership signals CIK-linked ownership evidence from parsed SEC filings. 1 signal
Parsed SEC ownership signals

Parsed SEC ownership coverage

These bars compare filing-backed value available in each disclosure family. Read them as separate lenses, not as one combined ownership total.

Forms 3/4/5 positions$3.76B

Reporting-owner positions with enough filing detail to estimate value.

Forms 3/4/5 position value

3/4/5
$3.76B

Estimated from parsed Forms 3/4/5 when filings include enough share and price data.

Source: Forms 3/4/5Confidence: Estimated when price data is available

Largest linked holdings

Largest issuer positions linked to this CIK across parsed 13F, 13D/G, and Forms 3/4/5 records.

HHH SEG

Largest active 13G stakes

Passive or institutional large-stake positions disclosed in parsed Schedule 13G filings.

PS
How to read these SEC ownership signals
  • Read each filing family separately: Form 13F, Schedules 13D/G, and Forms 3/4/5 answer different SEC disclosure questions and should not be blended into one ownership total.
  • Use 13F values for visible U.S.-listed equity portfolios, 13D/G rows for large beneficial-owner stakes, and Forms 3/4/5 rows for reporting-owner positions and transactions.
  • Open the linked research path when you need the filing, CIK, issuer, CUSIP, date, or source trail behind a value.
At a glance Names, identifiers, and filing context for this profile. 1 identity field
Business address
787 11 Th Avenue, 9 Th Floor, New York, NY, 10019
EDGAR profile Static EDGAR fields kept behind disclosure so the main profile stays readable. 1 profile field available
Fiscal year end
31 December

Filer intelligence

What SEC filings say about William A. Ackman

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

Save filer

Quick read

  • 1 recent 13D/G stake row found; top row is PS at 45% ownership.
  • Forms 3/4/5 show insider context for HHH worth $3.76B.

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 5 rows

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

Open

13D/G large-stake context

PS

30 Jun 2026 · Common Stock

45%
Issuer page 13D/G history

Forms 3/4/5 insider context

HHH

04 Jun 2026 · 10% owner

$3.76B
Issuer page Owner page

SEG

21 Apr 2026 · 10% owner

$1.95M
Issuer page Owner page

PSUS

30 Apr 2026 · Chief Executive Officer

Issuer page Owner page

PS

29 Apr 2026 · CEO & Chairman · 10% owner

Issuer page Owner page

Latest update

What changed recently for William A. Ackman

New filing available

Latest Schedule 13D/G period: 30 Jun 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

14 Aug 2026

Page type

Filer profile

Latest period

30 Jun 2026

Schedule 13D/G context is visible from filings filed on 14 Aug 2026.

Open filer profile Browse recent public updates

SEC filing record

CIK 0001056513 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
26
First seen
02 Jul 2021
Latest filing
14 Aug 2026
Entity
Individual

Observed form types

4 SCHEDULE 13G

CIK-linked evidence first

William A. Ackman SEC filings William A. Ackman 13D/G history William A. Ackman owner filings Open SEC filing index

Latest Filings

Showing the latest 12 of 26 SEC filings for William A. Ackman.

Open full filing history
SCHEDULE 13G

SCHEDULE 13G filing

Filing date
14 Aug 2026
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
25 Sep 2023
Reporting date
21 Sep 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
27 Jun 2023
Reporting date
23 Jun 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
22 Jun 2023
Reporting date
20 Jun 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
02 Jun 2023
Reporting date
31 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
30 May 2023
Reporting date
25 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
24 May 2023
Reporting date
22 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
19 May 2023
Reporting date
17 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
16 May 2023
Reporting date
12 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
11 May 2023
Reporting date
09 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
04 May 2023
Reporting date
02 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4

4 filing

Filing date
26 Apr 2023
Reporting date
24 Apr 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Manage preferences to update or revoke optional consent for future visits. For more information, see our Privacy Policy .