Updated Mar 9, 2026 · 2187 articles
Insights
Research, news and field guides on institutional positioning. Powered by real SEC filings — 13F, 13D/G, Form 4.
Martine Rothblatt Sold About $1.5M in United Therapeutics Stock During December 2025 While Exercising Options
United Therapeutics CEO Martine Rothblatt exercised options and sold UTHR shares worth ~$1.5M across December 17-19, 2025 at prices around $505-$511 per share.
Alex RiveraSatya Nadella Sold $75M in Microsoft Stock During September 2025 After Receiving a 308,870-Share Award
Microsoft CEO Satya Nadella sold approximately 149,000 shares of MSFT worth $75M in September 2025, following a stock award of 308,870 shares.
Alex RiveraElon Musk Bought $96M in Tesla Stock During September 2025 While Shares Traded Near $390
Tesla CEO Elon Musk purchased over 1.3 million TSLA shares worth approximately $96 million in September 2025 open-market buys, per Form 4 filings.
Alex RiveraLPL Financial's $366B Q4 2025 Filing: The Advisor Aggregator That Grew 63% in Six Quarters
LPL Financial's 13F grew from $224B to $366B in six quarters — a 63% surge. With 5,869 positions led by index ETFs, LPL's filing is a proxy for independent advisor sentiment.
Marcus ChenCitigroup's Q4 2025 Filing Lost 2,200 Positions but Kept $227B — Here's What the Pruning Means
Citigroup's 13F shrank from 14,658 to 12,467 positions while AUM barely changed ($224B to $227B). The bank is simplifying its equity book without losing scale.
Alex RiveraAllianceBernstein's $317B Q4 2025 Filing: 3,258 Positions and a Flat Quarter That Tells Its Own Story
AllianceBernstein held $317B across 3,258 positions in Q4 2025 — essentially unchanged from Q3. Nvidia, Microsoft, and Apple anchor the top, but the portfolio barely moved.
Marcus ChenGates Foundation Trust Rebuilt to $35.4B in Q4 2025 After a $8B Q3 — BRK/B Still Leads at 27.6%
The Gates Foundation Trust recovered from $8B in Q3 to $35.4B in Q4 2025 across 23 holdings. Berkshire Hathaway remains the top position at 27.6%, Waste Management at 18.0%.
Marcus ChenTCI Fund Management Put 27% of $53.6B Into GE Aerospace in Q4 2025 — a Nine-Stock Portfolio Built on Monopoly Economics
Chris Hohn's TCI Fund Management held just 9 positions worth $53.6B in Q4 2025. GE Aerospace topped the book at 27.3%, followed by Visa at 18.1% and Microsoft at 15.1%.
Marcus ChenPershing Square Ran $15.5B Through Just 11 Names in Q4 2025 — and Brookfield Led the Way
Bill Ackman's Pershing Square held only 11 positions worth $15.5B at year-end 2025. Brookfield Corp topped the book at 18.1%, followed by Uber at 15.9% and Amazon at 14.3%.
Marcus ChenWhy Two Managers Can Own the Same Stock for Opposite Reasons
The same ticker can mean benchmark exposure in one portfolio and concentrated conviction in another. Context is everything.
Sarah MitchellWhat a Reset Quarter Looks Like in 13F Data
Some quarters are just maintenance. Others are portfolio resets. Here is how to tell the difference in 13F data.
Sarah MitchellJoe Mansueto Sold Morningstar Stock While Still Controlling More Than a Third of the Company
Joe Mansueto sold Morningstar stock in February 2026, but the platform's 13D/G cross-check still pointed to beneficial ownership above 36%.
Alex RiveraHow to Read a First-Time 13F Without Inventing a Track Record
A first filing is a snapshot, not a pattern. Here is how to get useful signal from a new filer without pretending you already know its style.
Sarah MitchellHow to Read a 13F When ETFs Dominate the Top 10
ETF-heavy top holdings are not empty signal. They often tell you the actual allocation framework of the portfolio.
Sarah MitchellDennis Polk Sold TD SYNNEX Stock After Record Fiscal 2025 Results
Dennis Polk sold about $3.0M of TD SYNNEX stock on January 12, 2026, just days after the company reported record fiscal 2025 results.
Alex RiveraBalu Balakrishnan Sold Power Integrations Stock After the Company Restructured for 2026
Balu Balakrishnan sold Power Integrations stock across late January and early February 2026 as the company reported Q4 2025 results and announced a restructuring plan.
Alex RiveraWhat Holdings Count Really Tells You in a 13F
Holdings count is not a trivia field. It changes how you should interpret concentration, diversification, and the usefulness of a manager's top positions.
Sarah MitchellRichard Fairbank Sold Capital One Stock as the Discover Integration Became Real
Richard Fairbank sold about $46.2M of Capital One stock across late October and early November 2025 as Capital One moved from merger approval to Discover integration.
Alex RiveraJohn Hess Sold Chevron Stock After the Chevron-Hess Deal Closed, but His Latest 13G Still Showed 8.58% Beneficial Ownership
John Hess sold about $142.7M of Chevron stock across November 20-21, 2025 after the Chevron-Hess deal closed, while his latest Hess 13G still showed 8.58% beneficial ownership.
Alex RiveraJensen Huang Sold Nvidia Stock While AI Chip Demand Stayed Off the Charts
Jensen Huang sold about $6.6M of Nvidia stock across October 28-29, 2025, but the later quarter still confirmed AI demand was running hot and he still held 69.7M shares after the latest trade.
Alex Rivera