Updated Apr 14, 2026 · 2187 articles
Insights
Research, news and field guides on institutional positioning. Powered by real SEC filings — 13F, 13D/G, Form 4.
Why 13F Data Is Always 45 Days Old: The Filing Delay Explained
Every 13F filing describes positions from at least 45 days ago. Here is why the delay exists and how to use institutional holdings data correctly.
Sarah MitchellHow to Read 13D/G Filings for Activist Investor Signals
13D filings reveal activist intent while 13G filings signal passive accumulation. Here is how to tell the difference and what each means for stocks you follow.
Sarah MitchellFisher Asset Management Q4 2025: Ken Fisher’s $293B 13F Mixed Mega-Cap Tech With a $20B Bond ETF Sleeve
Fisher Asset Management reported $292.99B in Q4 2025 13F AUM, with Nvidia and Apple leading the book while iShares Treasury and corporate bond ETFs added a clear defensive sleeve.
Sarah MitchellSwiss National Bank's $168.01B US Equity Book Shows How a Central Bank Buys America's Mega-Caps
Swiss National Bank reported a $168.01B 13F portfolio for Q4 2025. The filing shows how a reserve manager gets US equity exposure: passive, diversified, and overwhelmingly tilted toward mega-cap technology.
Marcus ChenBerkshire Hathaway Q4 2025: Buffett’s $274.16B portfolio posts the highest WhaleScore in the market
Berkshire Hathaway closed 2025Q4 with $274.16B in reported 13F assets, 110 disclosed holdings, and an 85.75 WhaleScore that led all filers. The quarter reads like a high-conviction Buffett snapshot just as Greg Abel steps into the CEO role.
Marcus ChenCalPERS Q4 2025 13F: The Largest U.S. Public Pension Fund Doubles Down on Mega-Cap Leadership
CalPERS ended Q4 2025 with $174.90B in reported 13F AUM, led by a $19.81B VOO stake and heavyweight positions in Nvidia, Microsoft, Apple, and Alphabet.
Alex RiveraCapital Research Global Investors Added 9.9M Apple Shares While Cutting Meta in Q4 2025
Capital Research Global Investors finished Q4 2025 with $541.73B in 13F assets, a slightly larger book, and a clearer preference for Apple, NVIDIA, and other AI-linked compounders over Meta and Amazon.
Sarah MitchellMillennium Q1 2026 Preview: A 5,950-Holding Giant Just Pushed IWM to the Top of the Book
Millennium ended Q4 2025 with $237.79B in visible 13F assets, 5,950 holdings, and a top book dominated by IWM, IVV, QQQ, and NVDA. Q1 2026 will show whether the platform keeps leaning into ETF-heavy crowding.
Alex RiveraCoreWeave Insiders Sold About $28M on April 13, 2026 as CRWV Traded Above $100
Two CoreWeave executives exercised stock and sold roughly 252,085 shares on April 13, 2026. The combined sale value was about $28 million while CRWV later traded at $118.69 on April 16, 2026.
Alex RiveraBridgewater Q1 2026 Preview: After a $2.87B IVV Bet and a +102% QoQ Jump, What Does the Macro Giant Do Next?
Bridgewater ended Q4 2025 with $27.42B in visible 13F AUM, 1,040 holdings, and a surprisingly index-heavy core led by SPY and IVV. Q1 2026 will show whether that reset was tactical or durable.
Marcus ChenNorges Bank Q4 2025: Why a $935B Sovereign Fund Still Stopped at 1,577 Positions
Norges Bank's Q4 2025 13F disclosed $934.76B across just 1,577 positions, showing why sovereign-scale capital can still look highly selective in U.S. equities.
Marcus ChenNorges Bank's $62.24B NVIDIA Stake Anchors a $934.76B U.S. Portfolio
Norway's sovereign wealth fund disclosed a $934.76B U.S. equity portfolio in Q4 2025, led by a $62.24B NVIDIA stake and a tightly curated mega-cap core.
Marcus ChenBNY Mellon's Own $568B 13F Is Only 1% of the $59.3T It Safeguards
Bank of New York Mellon ended Q4 2025 with a $567.68B 13F portfolio across 33,186 positions, but the real takeaway is how small that disclosed equity book is versus the bank's $59.3T custody platform and $2.2T managed asset base.
Sarah MitchellFormer Boston Beer CEO Martin Roper Sold $2.5M of Vita Coco After COCO's 52-Week Surge
Martin Roper monetized 50,000 Vita Coco options for about $2.5 million in April, weeks after COCO hit a 52-week high and after the company posted 18% full-year sales growth.
Alex RiveraNorges Bank Q4 2025: $935B Sovereign Fund Holds Just 1,577 Positions
Norway Government Pension Fund Global reported $934.76 billion in US equities across just 1,577 positions in Q4 2025. Here is how the world largest sovereign wealth fund selects its US holdings.
Marcus ChenBNY Mellon Q4 2025: The Custodian Giant's Own $568B Investment Portfolio
Bank of New York Mellon reported $567.68 billion in 13F value for Q4 2025 across 33,186 positions. Here is how the world's largest custodian bank invests its own capital.
Sarah MitchellDimensional Fund Advisors Q4 2025: Academic factor investing at $476.72B scale
Dimensional Fund Advisors ended 2025 with $476.72B of reported 13F AUM and 13,709 holdings, showing how a Fama-French-style factor process still works at immense scale.
Marcus ChenHow Sovereign Wealth Funds Invest Differently Through 13F Filings
Norges Bank holds $935 billion in US equities across 1,577 positions. Here is how sovereign wealth fund 13Fs differ from hedge funds, and why GIC and ADIA should be read through a broader long-term lens.
Sarah MitchellWhat Quarterly AUM Jumps Really Mean: Normal Market Moves vs. New Money vs. Filing Changes
A 10% quarterly AUM move is usually market drift. A 50% move may be new money, a filing-entity reset, or a reporting-basis change. Here is the decision tree investors should use before overreacting to a 13F jump.
Marcus ChenHow Options Market Makers Distort 13F Holdings Data
Susquehanna reports $868 billion in 13F value, but it is an options market maker, not a traditional asset manager. Here is why reported 13F values for firms like SIG, Citadel, and Jane Street do not mean what most investors think.
Sarah Mitchell