The Big Three's combined Q4 2025 13F holdings reached $15.8 trillion — more than the GDP of Japan and Germany combined. Regulators and academics are increasingly questioning the market impact of passive concentration.
The Q1 2026 13F filing deadline falls on May 15, 2026. After a volatile Q1 marked by tariff escalation and tech rotation, institutional portfolio changes could be significant. Here's what to watch.
Saudi Arabia's Public Investment Fund disclosed a 6.2% stake (11.4M shares) in Take-Two Interactive in a Schedule 13G/A filed December 31, 2025 — continuing the kingdom's aggressive push into gaming.
Elliott Investment Management filed a Schedule 13D/A amendment on Triple Flag Precious Metals Corp on December 31, 2025, signaling continued activist engagement with the precious metals streaming company.
BlackRock Chairman and CEO Laurence Fink sold 20,858 shares of BLK stock over July 24-25, 2025, for approximately $30.2 million at prices near $1,125 per share — his largest sale window since selling $44M in August 2022.
Douglas Lebda, who founded LendingTree and sold $272.8M in career insider transactions, now holds only 7,500 directly-held shares worth roughly $257K as TREE trades near $34 — a fraction of the $70+ levels where his RSUs vested months earlier.
Robert Pittman, Chairman and CEO of iHeartMedia, has reported $6.3M in career open-market purchases against just $1.4M in sales. His latest buy in March 2026 continues a pattern of conviction buying.
Apple CEO Tim Cook has reported $1.21B in career Form 4 sales. His latest transactions in late 2025 included both Apple stock sales and a Nike board-related filing.
JPMorgan CEO Jamie Dimon has sold $461.7M in career Form 4 transactions but also bought $65.7M — making him one of the few mega-bank CEOs with significant open-market purchases on record.
Alphabet CEO Sundar Pichai has reported $794.9M in career stock sales per Form 4 data. His most recent filing from February 2026 covers January 2026 transactions.
Meta co-founder Mark Zuckerberg has reported $20.5B in career Form 4 sales, all executed through pre-arranged 10b5-1 trading plans. His most recent batch sold in October 2025.
CrowdStrike CEO George Kurtz sold approximately $15M in CRWD shares across two transactions in early February 2026. The sales, tied to RSU tax withholdings, came after CrowdStrike posted record FY2026 results with $5.25B in ARR.
Fortinet co-founder and CTO Michael Xie exercised and sold $28M in FTNT stock on February 2, 2026, bringing his career dispositions to $5.84B. Despite showing zero directly-held shares per Form 4, Xie retains over 33 million shares through family trusts.
Jeff Bezos transferred approximately 1.06 million AMZN shares through gift transactions (code G) in November 2025, worth roughly $245M at market prices.
Nike co-founder Phil Knight converted 4.5M NKE Class B shares to Class A in December 2025, continuing a pattern of annual share conversions for estate or trust planning.
Lilly Endowment, the 10%-plus owner of Eli Lilly, has reported $111B+ in career Form 4 sell transactions. The December 2025 filing continues decades of systematic diversification.
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.