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Port Capital’s Automatic Data Processing ADP Stock Holding History

Port Capital’s Portfolio ADP Stock Details ADP Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-74,813
Closed -$19.2M – 83
2025
Q4 		$19.2M Sell
74,813
-49,166
-40% -$13.1M 0.83% 35
2025
Q3 		$36.4M Buy
123,979
+353
+0.3% +$106K 1.52% 28
2025
Q2 		$38.1M Buy
123,626
+24,040
+24% +$7.38M 1.62% 28
2025
Q1 		$30.4M Buy
99,586
+44,700
+81% +$13.5M 1.38% 32
2024
Q4 		$16.1M Buy
54,886
+14,263
+35% +$4.22M 0.73% 35
2024
Q3 		$11.2M Buy
+40,623
New +$10.6M 0.5% 37

Other funds holding ADP

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Wells Fargo
Wells Fargo San Francisco, California $617B AUM 30.33% 1-Year Est. Return

Port Capital's ADP Position: Q1 2026 in Review

Port Capital sold out of Automatic Data Processing (ADP) in Q1 2026, closing a stake of 74,813 shares — an estimated $19.2M sold.

Port Capital first reported a position in ADP in Q3 2024 and held it in 6 quarters. The position peaked at $38.1M in Q2 2025. 2,280 funds tracked by Wall St. Rank hold ADP as of Q1 2026.

  • Port Capital reported no remaining Automatic Data Processing position as of Q1 2026 after selling out during the quarter.
  • Port Capital sold 74,813 Automatic Data Processing shares in Q1 2026, an estimated $19.2M.
  • Port Capital first reported a position in Automatic Data Processing in Q3 2024 and held it in 6 quarters.
  • Port Capital's Automatic Data Processing position peaked at $38.1M in Q2 2025.
  • 2,280 funds tracked by Wall St. Rank held Automatic Data Processing as of Q1 2026.

Based on Port Capital's 13F filing for Q1 2026, filed 15 May 2026.