Alex Rivera
Breaking News Editor
Breaking News Editor at 13F Insight. First to report on major SEC filings, institutional moves, and regulatory developments.
A note from Alex
Hey, I'm Alex. I spent three and a half years at Bloomberg writing breaking-news pieces about the kind of trades that move tickers in after-hours, and what I learned is that the news cycle moves a lot faster than the explanations do.
That's the gap I'm here to close. When a major insider files a Form 4 at 4:31pm, you should know about it by 5:00 — not in tomorrow's morning newsletter. And you should know what's actually new about it, not just that it happened.
I'll keep my pieces short, my numbers exact, and my opinions out of the lede. If something I wrote ages badly, I'll say so on the record.
Articles by Alex Rivera (682)
- News
CrowdStrike CEO George Kurtz Has Sold $702 Million in CRWD Stock Across 943 Transactions
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.
- News
Murray Stahl Has Filed 6,612 Insider Transactions at RENN Fund — Almost All Tiny Purchases
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.
- News
Former Google CEO Eric Schmidt Filed 57,681 Insider Transactions — Selling $5.5 Billion in GOOG Stock
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.
- News
Google Co-Founder Larry Page Has Sold $11.5 Billion in GOOG Stock Across 12,019 Transactions
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.
- News
Illumina Co-Founder David Walt Has Sold $114 Million in ILMN Stock — Now Buying Quanterix
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.
- News
Alphabet Chairman John Hennessy Has Sold $64 Million in GOOGL Stock — Including $184K in February 2026
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.
- News
UMB Financial CEO J. Mariner Kemper Has Sold $91 Million in UMBF Stock — Including $2.4 Million in February 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.
- News
TransDigm Founder Nicholas Howley Has Sold $1.26 Billion in TDG Stock Across 3,515 Transactions
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.
- News
United Therapeutics CEO Martine Rothblatt Has Sold $1.05 Billion in UTHR Stock Across 6,305 Transactions
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.
- News
Cimpress Founder Robert Keane Has Sold $129 Million in CMPR and ATRO Stock Across 4,058 Transactions
Robert S. Keane, founder of Cimpress (Vistaprint parent), has filed 4,058 insider transactions totaling $129 million in sales across CMPR and Astronics (ATRO).
- News
Insurance Mogul Patrick Ryan Has Bought $78 Million and Sold $181 Million Across Aon and Ryan Specialty
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.
- News
Continental Grain's Paul Fribourg Has Sold $402 Million and Bought $120 Million Across 9 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.
- News
TD SYNNEX Director Dennis Polk Has Sold $95 Million in SNX Stock Across 3,031 Transactions
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.
- News
M/I Homes Director Robert Schottenstein Has Sold $99 Million in MHO Stock Across 2,493 Transactions
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.
- News
Carnival's Micky Arison Has Sold $3.26 Billion in Cruise Line Stock Across 5,445 Transactions
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.
- News
Early Google Investor Kavitark Ram Shriram Has Sold $2.16 Billion in GOOG Stock Across 2,385 Transactions
Kavitark Ram Shriram, one of Google's earliest investors and an Alphabet board director, has sold $2.16 billion in GOOG stock across 2,385 insider transactions since 2004.
- News
Legendary VC John Doerr Has Sold $1.58 Billion in GOOG Stock Across 3,078 Transactions
L. John Doerr, Kleiner Perkins chair and longtime Alphabet director, has filed 3,078 insider transactions including $1.58 billion in sales across Google and 14 other companies.
- News
Alphabet Co-Founder Sergey Brin Has Sold $25.3 Billion in GOOG Stock Across 10,633 Transactions
Sergey Brin, co-founder and director of Alphabet, has filed 10,633 insider transactions totaling $25.3 billion in sales — the largest insider sell total in the tech sector.
- News
Tutor Perini's Ronald Tutor Has Sold $578 Million and Bought $4.4 Million in TPC Stock
Ronald Tutor, longtime leader of construction giant Tutor Perini, has filed 1,809 insider transactions totaling $578 million in sales and $4.4 million in purchases across the company he led for decades.
- News
LendingTree Founder Douglas Lebda Has Sold $273 Million and Bought $8.7 Million in TREE Stock
Douglas Lebda, founder and former CEO of LendingTree, has filed 1,059 insider transactions totaling $273 million in sales and $8.7 million in purchases. His most recent filing is from February 2026.