Automatic Data Processing, Inc.
Automatic Data Processing, Inc. (ADP) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ADP · as of Sep 30, 2025
Ownership Breakdown
2,448
Institutional Holders
▼ 80 vs Q2
$97.39B
Total Inst. Value
▼ $4.47B vs Q2
399.73M
Shares Outstanding
freeFloat 99.85%
332.12M
13F Shares Held
▲ 136,991 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ADP largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC services-computer processing & data preparation | 41.69M | 10.24% | 10.24% | $12.24T | Nov 7, 2025 | ▲ 389.5K |
BLACKROCK, INC. services-computer processing & data preparation | 36.18M | 8.89% | 8.89% | $10.62T | Nov 12, 2025 | ▲ 639.9K |
STATE STREET CORP services-computer processing & data preparation | 18.81M | 4.62% | 4.62% | $5.55T | Nov 14, 2025 | ▲ 25.4K |
MORGAN STANLEY services-computer processing & data preparation | 12.06M | 2.96% | 2.96% | $3.54T | May 27, 2026 | ▲ 1.42M |
GEODE CAPITAL MANAGEMENT, LLC services-computer processing & data preparation | 11.44M | 2.81% | 2.81% | $3.36T | Nov 12, 2025 | ▲ 50.8K |
CAPITAL RESEARCH GLOBAL INVESTORS services-computer processing & data preparation | 8.02M | 1.97% | 1.97% | $2.35T | Nov 13, 2025 | ▲ 116.1K |
WELLS FARGO & COMPANY/MN services-computer processing & data preparation | 7.14M | 1.75% | 1.75% | $2.09T | Nov 13, 2025 | ▼ 112.2K |
WELLINGTON MANAGEMENT GROUP LLP services-computer processing & data preparation | 6.83M | 1.68% | 1.68% | $2.00T | Nov 14, 2025 | ▲ 2.21M |
BANK OF NEW YORK MELLON CORP services-computer processing & data preparation | 6.63M | 1.63% | 1.63% | $1.95T | Nov 3, 2025 | ▼ 477.6K |
ALLIANCEBERNSTEIN L.P. services-computer processing & data preparation | 6.59M | 1.62% | 1.62% | $1.94T | Nov 14, 2025 | ▼ 541.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
27
Increased
+9.21M shares0
New Positions
first time holders22
Decreased
−4.74M shares0
Sold Out
fully exitedNet shares change (top 50)
+4.47M
+9.21M / −4.74M
Net new holders
+5
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ADP insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
1
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
SWAN ROBERT HOLMES director | May 7, 2026 | Purchase | 3,619 | $206.05 | $745.7K | 5.1K | Form 4 ↗ |
Michaud Brian L. Executive VP | May 8, 2026 | Sale | 848 | $212.13 | $179.9K | 14.5K | Form 4 ↗ |
D'Ambrosio Christopher Corp. VP | Apr 14, 2026 | Sale | 543 | $195.74 | $106.3K | 8.4K | Form 4 ↗ |
D'Ambrosio Christopher Corp. VP | Mar 16, 2026 | Sale | 543 | $208.45 | $113.2K | 8.9K | Form 4 ↗ |
D'Ambrosio Christopher Corp. VP | Feb 17, 2026 | Sale | 543 | $212.43 | $115.3K | 9.5K | Form 4 ↗ |
Michaud Brian L. Executive VP | Feb 6, 2026 | Sale | 1,000 | $234.18 | $234.2K | 15.3K | Form 4 ↗ |
Foskett David Corp. VP | Feb 5, 2026 | Sale | 266 | $237.00 | $63.0K | 11.0K | Form 4 ↗ |
Michaud Brian L. Executive VP | Feb 2, 2026 | Tax Withhold | 131.872 | $246.82 | $32.5K | 16.3K | Form 4 ↗ |
Foskett David Corp. VP | Jan 30, 2026 | Tax Withhold | 585.656 | $246.82 | $144.6K | 11.2K | Form 4 ↗ |
D'Ambrosio Christopher Corp. VP | Jan 13, 2026 | Sale | 543 | $262.29 | $142.4K | 10.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Automatic Data Processing, Inc. (ADP) is primarily owned by institutional investors, who hold approximately 83.1% of total shares outstanding. Company insiders own approximately 0.15%, while retail and public investors account for the remaining 16.77%.
The largest institutional shareholder of Automatic Data Processing, Inc. is VANGUARD GROUP INC, holding approximately 41.69 million shares — equal to 10.24% of outstanding shares — as of September 30, 2025.
A total of 2,448 institutional investors currently hold ADP stock, with a combined institutional value of approximately $97.39 billion as of the most recent 13F filing period.
Frequently asked questions
ADP ownershipAutomatic Data Processing, Inc. (ADP) is primarily owned by institutional investors, who hold approximately 83.1% of shares. The largest shareholder is VANGUARD GROUP INC with a 10.24% stake. Company insiders hold 0.15%. Data sourced from SEC Form 13F as of September 30, 2025.