Latest research, educational guides, and news from the world of institutional investing.
Dennis Nelson, longtime CEO of The Buckle, has executed 420 insider transactions totaling $108.6M in career sales with zero purchases, continuing steady selling into mid-2025.
Michael McMullen, Director at Agilent Technologies, has executed 266 insider transactions totaling $138.5M in career stock sales with zero purchases, including a $7.8M single-day sale at $150/share.
Williams-Sonoma CEO Laura Alber has executed 641 insider transactions totaling $204.5M in career stock sales, with $7.2M sold in January 2026 alone at prices above $205/share.
WEC Energy Group executive Gale Klappa has executed 640 insider transactions totaling $295M in career sales, with a systematic exercise-and-sell pattern continuing into February 2026.
Thomas Siebel, the billionaire who built and sold Siebel Systems to Oracle, has now filed 565 insider transactions totaling $396 million — including recent exercise-and-sell activity at C3.ai in early 2026.
George Kurtz, co-founder and CEO of CrowdStrike, has filed 943 insider transactions totaling $702 million in CRWD sales — most recently in February 2026 at prices above $413 per share.
Murray Stahl has filed 6,612 Form 4s for RENN Fund, buying $2.3 million of RCG stock across thousands of micro-purchases — often 18 to 360 shares at $2.85 each. His total career sales: $57,200.
Eric Schmidt, Google's former CEO and chairman, holds the record for one of the highest Form 4 filing counts ever: 57,681 transactions totaling $5.5 billion in GOOG sales before stepping away in 2019.
Larry Page, co-founder of Google and former CEO of Alphabet, filed 12,019 insider transactions totaling $11.5 billion in GOOG sales before his last filing in April 2022.
David Walt, co-founder of Illumina's core bead array technology and director at Quanterix, has sold $114 million in ILMN stock across 4,807 transactions — while recently buying $1.4 million of QTRX shares.
John Hennessy, Alphabet's chairman and former Stanford president, has filed 5,684 insider transactions totaling $64 million in GOOGL sales — with the latest batch on February 13, 2026.
J. Mariner Kemper, CEO of UMB Financial Corporation, has filed 3,764 insider transactions totaling $91 million in UMBF sales, with $2.4 million sold in early February 2026 at prices above $128.
W. Nicholas Howley, the founder and former CEO of TransDigm Group, has filed 3,515 insider transactions selling $1.26 billion in TDG and related stock — most recently in November 2025 at $1,340+ per share.
Martine Rothblatt, the founder and CEO of United Therapeutics, has filed 6,305 insider transactions totaling over $1 billion in UTHR sales — while continuing to exercise and sell options in December 2025.
Robert S. Keane, founder of Cimpress (Vistaprint parent), has filed 4,058 insider transactions totaling $129 million in sales across CMPR and Astronics (ATRO).
Patrick G. Ryan, founder of Aon Corporation and CEO of Ryan Specialty, has filed 2,444 insider transactions including $181 million in sales and $78 million in purchases across 3 companies.
Paul J. Fribourg, chairman of Continental Grain and director at multiple public companies, has filed 1,700 insider transactions including $402 million in sales and $120 million in purchases across 9 companies.
Dennis Polk, director and former CEO of TD SYNNEX, has filed 3,031 insider transactions totaling $95 million in sales at the IT distribution giant he led through its transformative Synnex-Tech Data merger.
Robert H. Schottenstein, longtime director at M/I Homes, has filed 2,493 insider transactions totaling $99 million in sales at the homebuilder he helped grow from a regional player to a national builder.
Micky Arison, former CEO and chairman of Carnival Corporation, has filed 5,445 insider transactions totaling $3.26 billion in sales across CCL and CUK shares since 2003.