Updated Mar 15, 2026 · 2187 articles
Insights
Research, news and field guides on institutional positioning. Powered by real SEC filings — 13F, 13D/G, Form 4.
Lilly Endowment Has Sold $111.8B in LLY Stock — But It's Not a Bearish Signal
The Lilly Endowment, one of America's largest charitable foundations, has systematically sold over $111 billion in Eli Lilly shares since 2003. This is not insider pessimism—it's foundation law in action.
Sarah MitchellMarc Benioff Has Sold $11.4B in Salesforce Stock — The Most Prolific Tech CEO Seller
Salesforce's founder and CEO has executed nearly 29,000 transactions over two decades, making him one of the most aggressive insider sellers in enterprise software. His latest activity: January 2026 option exercises.
Alex RiveraAtlassian Co-Founders Scott Farquhar and Mike Cannon-Brookes Sell $2.5B in Coordinated Liquidation
Both co-founders of Atlassian executed synchronized stock sales on the same day, unloading over $500M each in TEAM shares while retaining significant stakes as 10% owners.
Marcus ChenTesla CFO Vaibhav Taneja Sells $899K in Shares as Stock Hits $398 — Here's What the Timing Signals
Tesla's CFO sold 2,264 shares on March 6 at $397.03 per share, reducing his stake by 11% to 18,106 shares. The sale comes amid mixed Q4 earnings and a stretched valuation.
Alex RiveraWalton Family Holdings Trust Sells $160M in Walmart Stock Over Three Days — Systematic Cadence Continues
The Walton Family Holdings Trust executed 425,962 shares of Walmart across February 23-25, 2026, totaling $159.8M. The pattern reflects ongoing systematic rebalancing, not a bearish signal.
Alex RiveraNetflix CFO Spencer Neumann Sells $5.5M in Shares Under Pre-Scheduled 10b5-1 Plan
Netflix CFO Spencer Neumann sold 57,260 shares for $5.47 million on February 27, 2026, executing a pre-scheduled trading plan adopted in October 2025. The sales came after Netflix's strong Q4 earnings beat and stock surge.
Marcus ChenAMD CEO Lisa Su Sells $28.2M in Shares Through Systematic 10b5-1 Plan
Lisa Su, AMD's Chair, President & CEO, executed a coordinated multi-tranche sale of 128,000 shares on December 10-11, 2025, netting $28.2M. The pattern suggests execution of a pre-arranged 10b5-1 trading plan.
Alex RiveraHow to Spot Insider Buying Signals: A Beginner's Guide to Form 4 Data
Learn how to interpret insider buying transactions on Form 4 filings. Discover what makes a buy meaningful, how to filter noise, and how to use insider trading data to inform your investment decisions.
Sarah MitchellUnderstanding Portfolio Concentration: When Fewer Holdings Mean More
Learn how institutional investors use portfolio concentration as a strategy, and how to spot concentrated vs. diversified portfolios on 13F Insight.
Sarah MitchellRenaissance Technologies Q4 2025: The Alphabet Dump, NVIDIA Slash, and What the $64.5M Portfolio Really Tells Us
Renaissance Technologies’ Q4 2025 13F reveals a dramatic Alphabet exit (-89% to -94%), an 85% NVIDIA trim, and a 2,545% NFLX build. But the tiny $64.5M AUM confirms this is NOT the Medallion Fund—here is what the public portfolio actually signals.
Alex RiveraAQR Capital’s Q4 2025 Filing: 16,900+ Positions and the Momentum Machine in Full Swing
Cliff Asness’s AQR Capital disclosed $190.6B across 16,934 holdings in its Q4 2025 13F—one of the broadest institutional books in the market. Massive momentum-driven adds in NOW (+953%), NFLX (+691%), and CMG (+342%) reveal a factor engine firing on all cylinders.
Marcus Chen13F Filing Deadlines: When Institutional Holdings Data Is Released
A calendar guide to 13F filing deadlines, amendment windows, and how to plan your institutional holdings research around quarterly filing season for maximum efficiency.
Sarah MitchellWellington Management Q4 2025: $571B Giant Makes Bold Bets on DoorDash and Netflix
Wellington Management’s Q4 2025 13F shows aggressive conviction in DoorDash (+593%) and Netflix (+560%), while slashing Boeing and Exact Sciences. Inside the moves of a $571 billion active powerhouse.
Alex RiveraPoint72 Q4 2025: Steve Cohen’s $89.4B Fund Makes a $1.56B QQQ Bet While Loading Up on Defensive Plays
Point72 Asset Management’s Q4 2025 13F reveals a $1.56B new QQQ position alongside dramatic increases in UNH (+1,201%), PEP (+965%), and GLD (+891%) — a dual signal of tech conviction and defensive hedging from Steve Cohen’s team.
Alex RiveraHow to Use Watchlists to Monitor Smart Money Moves
A step-by-step guide to setting up and using 13F Insight watchlists to track institutional filers and stocks. Learn what to add, how to time your research around filing season, and how to interpret watchlist activity.
Sarah MitchellT. Rowe Price Q4 2025: 4,500 Positions, One Massive Netflix Bet
T. Rowe Price’s Q4 2025 13F reveals a +686% surge in Netflix shares alongside a sprawling 4,500-position book. We break down the conviction moves hiding inside one of America’s largest active managers.
Marcus ChenBridgewater’s Q4 2025 Repositioning: A $2.87B IVV Bet and 290 New Positions
Bridgewater Associates doubled its AUM to $27.4B in Q4 2025, anchored by a massive $2.87B iShares S&P 500 ETF position. With 290 new positions and 281 exits, the post-Dalio team is rewriting the playbook.
Alex RiveraMillennium Management Q4 2025: Izzy Englander’s Multi-Pod Giant Reveals Equity Rotation Patterns
Millennium Management’s Q4 2025 13F filing shows $237.8M in public equity holdings — a tiny slice of the firm’s $60B+ AUM — with 145 new positions and 145 exits reflecting the multi-pod hedge fund’s rapid-fire rotation strategy.
Marcus ChenTwo Sigma’s Q4 2025 Sector Rotation: Dumping Financials, Loading Tech and Biotech ETFs
Two Sigma Investments executed a massive sector rotation in Q4 2025, exiting $583M in financials while building $403M positions in tech ETFs. With 168 new positions and 168 exits, the quant fund’s algorithmic signals point to a decisive shift.
Marcus ChenWhat Is a Whale Score and How to Use It
A practical guide to using whale scores for screening, comparing, and evaluating institutional 13F filers. Learn when high scores are misleading and how to combine scores with other data for smarter research.
Sarah Mitchell