The news is likely to impact the share price of WPP as well as have wider implications for the advertising industry, including WPP AUNZ.
"It is hard to see a future for WPP", the chief executive said.
WPP's corporate development director and chief operating officer for Europe Andrew Scott and, Wunderman CEO Mark Read would don the mantle of co-chief operating officers.
WPP said Sorrell would be treated as having retired, with chairman Roberto Quarta becoming executive chairman until a new chief executive is appointed.
Sorrell, 73, will step aside immediately, according to a statement late on Saturday by WPP.
Earlier this month, the board of WPP appointed an independent counsel to investigate Sorrell for personal misconduct. His departure followed allegations of personal misconduct and misuse of company assets and comes days before the board was set to publish the findings of their investigation. "However, I believe it is in the best interests of the business if I step down now", said Sorrell.
Having denied the unspecified allegation made against him by a whistleblower, Sir Martin's decision to resign will inevitably spark speculation about the nature of the claims made against him.
Mr Sorrell is among the most influential advertising professionals globally and also the longest-serving FTSE-100 chief executive, who has run WPP since setting up the business in 1985. Sir Martin would of course assist with the transition. WPP's shares have lost a third of their value of the past year-far more than rivals facing the same market challenges-as its financial guidance has repeatedly proved too optimistic.
Some multinational advertisers, including P&G, which owns Ariel and Gillette, have signalled their intention to take more of their marketing services activity in-house, reducing the lucrative work for which they are charged by external agencies.
He added in a letter sent to WPP staff: "As I look ahead, I see that the current disruption is simply putting too much unnecessary pressure on the business, our 200,000 people and their 500,000 or so dependents, and clients we serve in 112 countries".
WPP has seen its shares fall by almost a third during the last 12 months, although it still has a market capitalisation of more than £15bn.
"Once WPP breaks up, the pressure on the other guys will be irresistible", he added.
A 2010 egg-related salmonella outbreak led to more than 550 million getting pulled from shelves and thousands became sick. The eggs from the Hyde County farm reached consumers in 10 states, including New Jersey, New York and Pennsylvania.
Hynes wasn't ready to discuss whether he'll change starting goaltenders for the next game. "It's going to be very tough for us". The Devils have played well in spurts, overcoming slow starts to keep both games interesting. "The guys care a lot, " he said.
Bush spent two days at Methodist Hospital earlier this month but decided not to return there when her health began to deteriorate. Abigail Adams was the wife of the second president, John Adams, and mother of the sixth president, John Quincy Adams.
Maple Leaf Sports and Entertainment has closed Jurassic Park because of wintry weather that has descended on Toronto. The Raptors opened as 8.5-point favorites; the total is at 210.5, according to sportsbooks monitored by OddsShark.
They may leave restroom doors unlocked or add key code entries if they feel the store is more at risk for criminal behavior. Police said they are conducting an internal investigation. "These officers did absolutely nothing wrong ", he insisted .
But it doesn't depend on the United result, it's in our hands, it's up to us to win our games, and we are able to win two games'. City let slip a 2-0 lead to lose 3-2 in the Manchester derby on 7 April, when victory would have clinched the title.
But the manner of their title confirmation is perhaps the best evidence of City's quality and the shortcomings of their rivals. But what can not be argued against are the records that City have smashed on their way to the title this season.
Mr Buckel was the lead attorney in a case involving Brandon Teena , a transgender man murdered in the U.S. state of Nebraska. Early Saturday morning , people at Prospect Park noticed Buckel's body before first responders arrived on the scene.
The possibility of tornadoes or hail are listed as low, but with the enhanced risk, isolated tornadoes can not be ruled out. That's not all, it's also packing a severe weather threat with numerous tornado and severe t-storm watches in place.
The interview, conducted by George Stephanopoulos, took place in Comey's home in Virginia last Monday, according to Axios . Trump slammed Comey on Friday morning and called him a "proven LEAKER & LIAR" and a "weak and untruthful slime ball".