Bill Ackman, Pershing Square Capital Management CEO, discusses how being added to ADP’s board will affect the company’s stock.

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Bill Ackman: ADP can acquire TH Lee

Bill Ackman: ADP can acquire TH Lee from CNBC.

Bill Ackman: This situation reminds me of P&G's proxy fight with Peltz

Bill Ackman, Pershing Square Capital Management CEO, discusses why he is looking to improve ADP.

Bill Ackman: This situation reminds me of P&G's proxy fight with Peltz from CNBC.

Ackman on P&G proxy fight: They treat Nelson Peltz like a virus

Bill Ackman, Pershing Square Capital Management CEO, discusses P&G's proxy fight with Trian's Nelson Peltz.

Ackman on P&G proxy fight: They treat Nelson Peltz like a virus from CNBC.

Bill Ackman: I can work effectively with ADP CEO Carlos Rodriguez

Bill Ackman, Pershing Square Capital Management CEO, discusses why he is looking to improve ADP.

Bill Ackman: I can work effectively with ADP CEO Carlos Rodriguez from CNBC.

Bill Ackman: Here's how ADP can be a more effective company

Bill Ackman, Pershing Square Capital Management CEO, discusses why he is looking to improve ADP.

Bill Ackman: Here's how ADP can be a more effective company from CNBC.

Bill Ackman: ADP has started to see real competition

Bill Ackman, Pershing Square Capital Management CEO, discusses why he is looking to improve ADP.

Bill Ackman: ADP has started to see real competition from CNBC.

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