Sean Williams

Sean Williams

TMFUltraLong

Sean Williams is a data-driven Motley Fool contributing analyst who's been investing for 28 years and has penned north of 16,000 articles. You'll find him at the intersection of politics and investing tackling macroeconomic topics of interest (Social Security and Donald Trump's economic/tax policies), analyzing which stocks billionaire investors (e.g., Warren Buffett) are buying and selling, and digging into how the world's most-influential businesses and trends -- everything from the evolution of artificial intelligence (AI) to the next stock split -- are changing Wall Street. He holds a B.A. in Economics from the University of California, San Diego.

Money Manager Stock Chart Market Level 2 Data Invest Getty

Sep 18, 2025 by Sean Williams

Billionaire Bill Ackman Has Been a 7-Year Seller of Chipotle, and He's Made a Stock Whose Addressable Market Can 10X by 2033 His Fund's No. 1 Holding

One of Wall Street's most-prominent activist investors has been steadily reducing his stake in Chipotle and has now devoted 21% of his fund's invested assets to an undisputed industry leader.

Articles by Sean Williams — Page 47

Billionaire Bill Ackman Has Been a 7-Year Seller of Chipotle, and He's Made a Stock Whose Addressable Market Can 10X by 2033 His Fund's No. 1 Holding

2 Trillion-Dollar Artificial Intelligence (AI) Stocks That Can Plunge Up to 95%, According to Select Wall Street Analysts

These 3 Stock-Split Stocks Are Absolutely Crushing the Benchmark S&P 500 This Year

Billionaire David Tepper of Appaloosa Is Buying 3 Trillion-Dollar Artificial Intelligence (AI) Stocks and Selling 3 Others

Want to Earn a Safe 10.5% Annual Yield and Be Paid Monthly? Invest in the Following 3 Ultra-High-Yield Dividend Stocks.

Move Over, Oracle! This Industry Leader Is Ideally Positioned to Become Wall Street's Next Trillion-Dollar Stock.

Billionaire Warren Buffett Is Wagering $68 Billion on Just 2 Artificial Intelligence (AI) Stocks

Billionaire Stanley Druckenmiller Dumped His Fund's Stake in Tesla and Is Piling Into a Stock That Rallied 56% Last Week Amid Buyout Rumors

Bad News: A Double Whammy Awaits Most Social Security Beneficiaries in 2026

Forget President Donald Trump's Tariffs and Their Inflationary Impact -- This Is Wall Street's Ticking Time Bomb, Based on What History Tells Us

Social Security Will Permanently Change on Sept. 30, With 5 Additional Changes a Near-Certainty on Jan. 1

Pay Attention! Nvidia and Palantir Have Served Up a $12.5 Billion Warning for Wall Street.

Billionaire Warren Buffett Can't Stop Buying Shares of a Historically Cheap Legal Monopoly, but Also Dumped Nearly a Third of His Stake in Another Monopoly

Prediction: 3 Blockbuster Stock Splits That'll Be Announced Within the Next 12 Months

These Are the 3 Most Widely Owned Exchange-Traded Funds (ETFs) by Retail Investors

Billionaire Terry Smith of Fundsmith, Known as "Britain's Warren Buffett," Is Sending an Unmistakable Warning to Wall Street

Billionaire Chase Coleman Dumped 44% of Tiger Global's Stake in CrowdStrike and Loaded Up on a Historically Cheap Member of the "Magnificent Seven"

4 Quirky Things That Make Costco One of the Most-Successful Retailers -- Including a New Rule That Impacts Most of Its Nearly 80 Million Members

Wall Street's Hottest Stock-Split Stock Can Skyrocket 280%, According to One Optimistic Analyst

45% of Billionaire Bill Ackman's Portfolio Is Invested in 2 Trillion-Dollar Artificial Intelligence (AI) Stocks and a Company Whose Addressable Market Can 10X by 2033

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