Latest research, educational guides, and news from the world of institutional investing.
Warren Buffett slashed Amazon by 77% in his final quarter as Berkshire Hathaway CEO, while adding to Chevron, Chubb, and Domino's. Deep dive into the $274.2B Q4 2025 13F filing.
John Armitage exited 9 positions including META ($397M) and Progressive, then opened 10 new ones led by a $1.36B Amazon bet at 14.8% of portfolio. More than half of Egerton’s $9.2B portfolio is entirely new.
Tom Steyer’s Farallon Capital cut its HYG put position by 80% — from $3.17B to $645M — while deploying billions into Revolution Medicines, Natera, and BridgeBio. The $42B fund also dumped 77% of its Bitcoin ETF.
Eric Mandelblatt's Soroban Capital deployed $9.2B in a single quarter — tripling AUM from $5.15B to $14.33B — while building a rare tech-utility barbell with MSFT and AMZN at the top and nine regulated utilities underneath.
Eric Mandelblatt's Soroban Capital deployed $9.2B in a single quarter — tripling AUM from $5.15B to $14.33B — while building a rare tech-utility barbell with MSFT and AMZN at the top and nine regulated utilities underneath.
STATE STREET CORP reported $2980.91B in Q4 2025 13F assets with top-10 concentration at 31.36%. We break down what changed and what retail investors can act on.
BlackRock, Inc. reported $5916.35B in Q4 2025 13F assets with top-10 concentration at 30.44%. We break down what changed and what retail investors can act on.
VANGUARD GROUP INC reported $6897.68B in Q4 2025 13F assets with top-10 concentration at 31.23%. We break down what changed and what retail investors can act on.
Pershing Square expanded its 13F portfolio by 25.2% quarter-over-quarter in Q4 2025, adding Amazon and Meta as major new positions while Brookfield became the top holding.
Josh Donfeld's Castle Hook Partners exited Bitcoin entirely, built a 35% gold allocation, added $8.3B in equity puts, and grew 13F AUM 74% to $24.1B in Q4 2025 — the most dramatic macro pivot of filing season.
Josh Donfeld's Castle Hook Partners exited Bitcoin entirely, built a 35% gold allocation, added $8.3B in equity puts, and grew 13F AUM 74% to $24.1B in Q4 2025 — the most dramatic macro pivot of filing season.
Yacktman's Q4 2025 13F reveals Canadian Natural Resources at #1 (8.9%) in a portfolio famous for PepsiCo, P&G, and Coca-Cola. Inside the $7.1B consumer-value strategy with +146% unrealized gains on oil.
Pzena Investment Management hit an all-time high $33.4B AUM in Q4 2025 with Magna International as its #1 holding. The deep value firm owns 13.8% of Baxter International, 11.7% of Skyworks, and 11.3% of Amdocs — with zero FAANG stocks in its top 25.
Smead Capital's Q4 2025 13F reveals a $4.8B portfolio with 27.5% in housing, 20.6% in banks, and just 2.2% in tech. At 15.5x P/E vs the S&P 500's 27.7x, Bill Smead is betting that overlooked value sectors will deliver the same alpha they did after similar discounts in 2015, 2020, and 2022.
A non-tech research note on interpreting bank exposure changes in Q4 2025 13F filings: rotation patterns, funding sources, and a checklist to avoid common 13F traps.
Chris Davis allocates 32%+ to financial stocks—led by a monster 9.4% Capital One position—while trimming Big Tech. A deep dive into the third-generation value investor's Q4 2025 playbook.
Carl Icahn's Q4 2025 13F reveals extreme energy concentration — IEP and CVR Energy alone account for 70% of his $8.45B portfolio, with zero technology exposure and just 13 holdings.
While most institutional giants chase the Magnificent Seven, this 95-year-old value fund puts financials, defense, and healthcare in its top 5 holdings — and its $185B AUM keeps growing.
Baker Bros Advisors surged 67.8% to $17.08B in Q4 2025 by injecting $6.9B across 19 new biotech positions while maintaining a 100% healthcare portfolio — the largest pure-play biotech fund in 13F filing history.
Bill Harnisch’s Peconic Partners exploded from $140M to $4.2B in Q4 2025 by going all-in on Quanta Services, Dycom, and MasTec — the companies building the power lines and fiber networks behind AI, broadband, and clean energy.