WILLIAM A ACKMAN
CIK 1056513 · CEO & Chairman · last filed 2026-08-19
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Loading insider history…
Disclosed Exposure
$6.52B
Companies
12
Total Filings
63
Lifetime Open-Market Net
-$5.40B
Filer Profile
Reported Address
787 - 11TH AVENUE9TH FLOOR
NEW YORK, NY 10019
Phone
(212) 813-3700
Related Filers
Pershing Square Capital Management, L.P. — 148 joint filings, latest 2026-06-08
PS Management GP, LLC — 140 joint filings, latest 2026-04-23
Pershing Square GP, LLC — 36 joint filings, latest 2013-08-28
Howard Hughes Holdings Inc. — 26 joint filings, latest 2026-06-08
GOTHAM HOLDINGS III LLC — 13 joint filings, latest 2008-02-14
PERSHING SQUARE HOLDCO, L.P. — 12 joint filings, latest 2026-08-19
FORTUNE BRANDS INC — 8 joint filings, latest 2014-02-03
J C PENNEY CO INC — 8 joint filings, latest 2013-08-28
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses.
View filings on SEC EDGAR.
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| PS | CEO & Chairman | 1,668,200 | $40.14 | $66.96M | $0 | 1 | 2026-08-19 |
| PSUS | Chief Executive Officer | 4,841,000 | $38.65 | $187.10M | $240.86M | 1 | 2026-05-01 |
| HHH | Director | 18,851,964 | $61.19 | $1.15B | $214.05M | 10 | 2023-12-11 |
| Howard Hughes Corp (HHC) Delisted | Director | 16,530,051 | $78.76 | $1.30B | $1.53B | 25 | 2023-06-22 |
| CMG | Director | 54,464,750 | $37.05 | $2.02B | -$3.23B | 11 | 2021-09-08 |
| Element Solutions Inc (PAH) Delisted | Director | 40,451,506 | — | — | $0 | 3 | 2018-08-07 |
| CP | Director | 0 | $89.98 | $0 | -$4.18B | 1 | 2016-08-05 |
| ZTS | Director | 41,823,145 | $74.02 | $3.10B | -$0 | 1 | 2015-07-02 |
| J C PENNEY CO INC (JCP) Delisted | Director | 39,075,771 | — | — | $0 | 3 | 2013-07-03 |
| GENERAL GROWTH PROPERTIES INC (GGP) Delisted | Director | 23,953,782 | — | — | $0 | 2 | 2010-03-10 |
| BORDERS GROUP INC (BGP) Delisted | 10%+ Owner | 10,597,880 | — | — | $25.33M | 1 | 2007-11-29 |
| CERIDIAN CORP /DE/ (CEN) Delisted | 10%+ Owner | — | $20.73 | — | $0 | 1 | 2007-02-06 |
Recent Filings · Page 3 of 7
63 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2023-04-17 | Howard Hughes Corp (HHC) Delisted | Buy (P) | +7,359 | $550.6K | EDGAR |
| 2023-03-27 | Howard Hughes Corp (HHC) Delisted | Buy (P) | +71,616 | $5.36M | EDGAR |
| 2023-03-20 | Howard Hughes Corp (HHC) Delisted | Buy (P) | +9,153 | $686.0K | EDGAR |
| 2023-03-15 | Howard Hughes Corp (HHC) Delisted | Buy (P) | +187,422 | $14.00M | EDGAR |
| 2022-12-22 | Howard Hughes Corp (HHC) Delisted | Buy (P) | +154,356 | $11.51M | EDGAR |
| 2021-09-08 | CMG | Buy (P) | +123,624 | $236.13M | EDGAR |
| 2021-07-02 | CMG | Sell (S) | −37,857 | -$58.07M | EDGAR |
| 2021-01-08 | Howard Hughes Corp (HHC) Delisted | Mixed | +3,996,000 | $316.26M | EDGAR |
| 2021-01-06 | CMG | Sell (S) | −225,288 | -$301.69M | EDGAR |
| 2020-06-11 | Howard Hughes Corp (HHC) Delisted | Grant (A) | +30,000,000 | $1.50B | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.