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 (827)
- News
Satya Nadella Sold $75M in Microsoft Stock During September 2025 After Receiving a 308,870-Share Award
Microsoft CEO Satya Nadella sold approximately 149,000 shares of MSFT worth $75M in September 2025, following a stock award of 308,870 shares.
- News
Elon Musk Bought $96M in Tesla Stock During September 2025 While Shares Traded Near $390
Tesla CEO Elon Musk purchased over 1.3 million TSLA shares worth approximately $96 million in September 2025 open-market buys, per Form 4 filings.
- Research
Citigroup's Q4 2025 Filing Lost 2,200 Positions but Kept $227B — Here's What the Pruning Means
Citigroup's 13F shrank from 14,658 to 12,467 positions while AUM barely changed ($224B to $227B). The bank is simplifying its equity book without losing scale.
- News
Joe Mansueto Sold Morningstar Stock While Still Controlling More Than a Third of the Company
Joe Mansueto sold Morningstar stock in February 2026, but the platform's 13D/G cross-check still pointed to beneficial ownership above 36%.
- News
Dennis Polk Sold TD SYNNEX Stock After Record Fiscal 2025 Results
Dennis Polk sold about $3.0M of TD SYNNEX stock on January 12, 2026, just days after the company reported record fiscal 2025 results.
- News
Balu Balakrishnan Sold Power Integrations Stock After the Company Restructured for 2026
Balu Balakrishnan sold Power Integrations stock across late January and early February 2026 as the company reported Q4 2025 results and announced a restructuring plan.
- News
Richard Fairbank Sold Capital One Stock as the Discover Integration Became Real
Richard Fairbank sold about $46.2M of Capital One stock across late October and early November 2025 as Capital One moved from merger approval to Discover integration.
- News
John Hess Sold Chevron Stock After the Chevron-Hess Deal Closed, but His Latest 13G Still Showed 8.58% Beneficial Ownership
John Hess sold about $142.7M of Chevron stock across November 20-21, 2025 after the Chevron-Hess deal closed, while his latest Hess 13G still showed 8.58% beneficial ownership.
- News
Jensen Huang Sold Nvidia Stock While AI Chip Demand Stayed Off the Charts
Jensen Huang sold about $6.6M of Nvidia stock across October 28-29, 2025, but the later quarter still confirmed AI demand was running hot and he still held 69.7M shares after the latest trade.
- News
CHEGG, INC Insider ROSENSWEIG DANIEL Bought About $56K During February 2026
ROSENSWEIG DANIEL disclosed roughly $56K of recent CHGG buying during February 2026, putting fresh capital behind the position in the open market.
- News
Maze Therapeutics, Inc. Insider SCHELLER RICHARD H Sold About $464K Through a September 2025 Window
SCHELLER RICHARD H disclosed roughly $464K of recent MAZE selling across a September 2025 window, making the pattern more useful as a cadence signal than a single-trade headline.
- News
INSPERITY, INC. Insider SARVADI PAUL J Sold About $564K Through a September 2025 Window
SARVADI PAUL J disclosed roughly $564K of recent NSP selling across a September 2025 window, making the pattern more useful as a cadence signal than a single-trade headline.
- News
AMPCO PITTSBURGH CORP Insider Louis Berkman Investment CO Bought About $248K During November 2025
Louis Berkman Investment CO disclosed roughly $248K of recent AP buying during November 2025, putting fresh capital behind the position in the open market.
- News
Immunome Inc. Insider SIEGALL CLAY B Bought About $1.2M During December 2025
SIEGALL CLAY B disclosed roughly $1.2M of recent IMNM buying during December 2025, putting fresh capital behind the position in the open market.
- News
Stitch Fix, Inc. Insider Lake Katrina Sold About $2.3M Through a September 2025 to December 2025 Window
Lake Katrina disclosed roughly $2.3M of recent SFIX selling across a September 2025 to December 2025 window, making the pattern more useful as a cadence signal than a single-trade headline.
- News
PEGASYSTEMS INC Insider KOUNINIS EFSTATHIOS A Sold About $755,764 Through a September-October 2025 Window
KOUNINIS EFSTATHIOS A sold roughly $755,764 of PEGA stock during a visible September-October 2025 liquidity window, making the pattern more useful as a cadence signal than a one-day headline.
- News
FAIR ISAAC CORP Insider LANSING WILLIAM J Sold About $4.2M Through a November 2025 Window
LANSING WILLIAM J sold roughly $4.2M of FICO stock during a visible November 2025 liquidity window, making the pattern more useful as a cadence signal than a one-day headline.
- News
Atlassian's Co-Founders Sold About $14.9M in Lockstep Over a January Window
Scott Farquhar and Mike Cannon-Brookes sold roughly $14.9M of Atlassian stock over the same late-January window, making the pattern look coordinated rather than incidental.
- News
United Therapeutics CEO Martine Rothblatt Sold About $8.4M Through a December Exercise Window
Martine Rothblatt sold roughly $8.4M of United Therapeutics stock across four December 2025 sessions, a pattern that looked more like disciplined exercise monetization than a blind exit.
- News
Morningstar Founder Joseph Mansueto Sold About $2.0M as the Data-and-Ratings Story Settled Into a New Range
Joseph Mansueto sold roughly $2.0M of Morningstar stock across two February 2026 sessions, extending a long-running founder liquidity pattern after the stock had already repriced lower from late-2025 highs.