Historical position

Warren Buffett’s Automatic Data Processing In (ADP) position

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

Berkshire HathawayVerified through Q2 2026
Relationship snapshot

At a glance

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

First reportedQ3 2003Earliest verified positive filing snapshot
Latest statusHistorical positionBased on the latest supported relationship state
Peak shares1.65MHighest verified quarter-end share count
Quarters reported2Verified quarters with shares above zero
What happened?

Berkshire Hathaway first reported Automatic Data Processing In in Q3 2003. The reported position was reduced across later filings. Verified positive position history runs through Q4 2003. The current relationship status cannot be determined reliably from supported data.

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.

Q1 2004
Sold the entire position−1.42M shares · No shares reported at quarter-end
Q4 2003
Sold 14.1% of the position−233.30K shares · 1.42M shares remained
Filing context

Quarter-end price $39.61 · Estimated holding basis $35.85

Q3 2003
New position+1.65M shares · 1.65M shares reported
Filing context

Quarter-end price $35.85 · Estimated holding basis $35.85

Portfolio importance

How important was Automatic Data Processing In in Berkshire Hathaway’s reported portfolio?

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

Last reported portfolio weight0.2%Q4 2003
Last reported rank#28of 30 reported positions
Peak portfolio weight0.2%Q3 2003
Best historical rank#26Q3 2003
At peak importanceQ3 2003
ADP
0.2%
Largest holding
27.7%
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 Berkshire Hathaway’s Form 13F disclosures. It is not Warren Buffett’s personal brokerage account, and 13F filings do not reveal exact trade dates or execution prices.