For ADP, he’s Bill yakety (y)Ackman

Automatic Data Processing doesn’t like to be lectured — especially when it’s a 3 ¹/2 -hour snoozefest led by hedgie billionaire Bill Ackman.

Just two weeks ago, Ackman delivered a 168-slide presentation full of ideas on how to revive ADP — only to discover that afternoon that ADP’s board had skipped watching it.

One director heard a “portion of the presentation” but “it was unclear whether the other members had listened to any of the webcast,” Ackman’s hedge fund Pershing Square griped in a Monday filing with the Securities and Exchange Commission.

Ackman learned of the insult only hours after broadcasting his talk to investors, getting the news during a phone interview with the ADP’s nominating and corporate governance committee.

Ackman expressed hopes the board would expand to accommodate his three nominees, according to the filing.

One board member said “they did not know but would think about the request,” according to the filing.

But shortly after Ackman’s presentation concluded ADP issued what Pershing Square called a “dismissive” press release, noting that ADP said it “presented nothing that has not previously been analyzed.”

ADP publicly rejected Ackman’s nominees four days later, with ADP Chairman John Jones adding for good measure that the current board has a “deep understanding and appreciation” of ADP’s business — “unlike Mr. Ackman’s nominees.”

Hoping to avoid a proxy battle after taking an 8.3 percent stake, Ackman requested that the company extend its Aug. 10 board nomination deadline, according to Monday’s filing.

Reps from ADP declined to comment.