Exited position

Bill Ackman’s Automatic Data Processing In (ADP) position

Reported position history, portfolio importance and verified filing changes from public SEC disclosures.

Pershing Square Capital ManagementVerified through Q2 2026
Relationship snapshot

At a glance

The full verified relationship, including prior ownership episodes and exits where supported.

First reportedQ2 2009Earliest verified positive filing snapshot
Latest statusExited positionBased on the latest supported relationship state
Peak shares8.80MHighest verified quarter-end share count
Quarters reported15Verified quarters with shares above zero
What happened?

Pershing Square Capital Management first reported Automatic Data Processing In in Q2 2009. The reported position was increased and reduced across later filings. The latest verified relationship event shows that Pershing Square Capital Management sold the entire position in Q3 2019, and the stock is no longer reported in the latest verified portfolio.

Verified SEC history

Position over time

See the same verified relationship through reported shares, portfolio weight or reported value.

Metric

Gaps indicate periods that cannot be safely connected or where a verified corporate action changes the raw share scale. Stock price, when available, is market context and not a transaction price.

Key filing events

What changed

Latest filing plus the most meaningful reported changes. Unchanged quarters are collapsed by default.

Q3 2019
Sold the entire position−4.03M shares · No shares reported at quarter-end
Q1 2019
Sold 1.0% of the position−40.60K shares · 4.03M shares remained
Filing context

Quarter-end price $159.74 · Estimated holding basis $108.19

Q4 2018
Bought 1.0% more+40.70K shares · 4.07M shares reported after the change
Filing context

Quarter-end price $131.12 · Estimated holding basis $108.19

Q3 2018
Sold 4.6% of the position−195.94K shares · 4.03M shares remained
Filing context

Quarter-end price $150.66 · Estimated holding basis $107.95

Q2 2018
Sold 46.8% of the position−3.72M shares · 4.23M shares remained
Filing context

Quarter-end price $134.14 · Estimated holding basis $107.95

Q1 2018
Sold 9.7% of the position−856.49K shares · 7.94M shares remained
Filing context

Quarter-end price $113.48 · Estimated holding basis $107.95

2 unchanged quarters are collapsed by default.

Portfolio importance

How important was Automatic Data Processing In in Pershing Square Capital Management’s reported portfolio?

Relative importance is measured only within the verified primary non-option reported portfolio for each quarter.

Last reported portfolio weight9.9%Q2 2019
Last reported rank#7of 8 reported positions
Peak portfolio weight18.8%Q3 2017
Best historical rank#2Q3 2017
At peak importanceQ3 2017
ADP
18.8%
Largest holding
33.1%
Cross-investor discovery

Who else owns Automatic Data Processing In?

Also reported by 3 other tracked investors in their latest verified filings.

Terry SmithFundsmith LLP
ADP4.3% of reported portfolio
Joel GreenblattGotham Asset Management
ADP0.2% of reported portfolio
Ray DalioBridgewater Associates, LP
ADP0.0% of reported portfolio
Explore Automatic Data Processing In across all tracked investors →
SEC evidence & methodology

SEC filing evidence

Market context and filing-derived values are kept separate from actual transaction prices, which 13F filings do not disclose.

Latest verified stock price$271.222026-09-18

Market context only; not an investor transaction price.

Latest verified investor filingQ2 2026 · filed 2026-08-14
Open SEC filing ↗

This tracker follows Pershing Square Capital Management’s Form 13F disclosures. It is not Bill Ackman’s personal brokerage account, and 13F filings do not reveal exact trade dates or execution prices.