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
Frontier Tarmac Fatality at Denver: Who Really Owns ULCC
A Frontier Airlines aircraft fatally struck a person at Denver International Airport — the kind of operational headline that markets price in seconds. The ULCC cap table is where the story gets interesting: founder-PE Indigo Partners holds nearly half its book in this single name.
- News
Bristol Myers Bets $15B on Hengrui: BMY Active Holders Read
Bristol Myers Squibb committed $600M upfront and up to $15.2B in milestones for 13 Hengrui Pharma assets. The cap table tells you which active managers were already positioned for this kind of pipeline bet — and which weren't.
- News
Eric Yuan's $7M Zoom Sell: Founder's Class B Drip Continues
Eric Yuan's April Form 4 stack converted 85K Class B Zoom shares to Class A and sold at $80-84. He still holds 20.7M shares — a methodical, plan-driven distribution, not an AI-pivot vote of no-confidence.
- News
George Kurtz Sells $20M of CrowdStrike on Daily Cadence
CrowdStrike CEO George Kurtz's most recent Form 4 stack shows 2,500-share daily sales at $498-528 - the unmistakable cadence of a Rule 10b5-1 plan, executing into post-outage recovery prices.
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EU Targets Meta's Teen Algorithm: 13F Holder Concentration Map
Brussels' new Digital Fairness Act takes aim at TikTok and Meta's recommendation engines for minors. Meta's $113B BlackRock anchor and 5,297-holder long tail set up an unusual regulatory-risk transmission path.
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United Flight Attendants Win 31% Raise: 13F Holder Reaction Map
United Airlines flight attendants ratified a contract delivering 31% raises this summer. The cost lands on a holder base concentrated in margin-sensitive active managers — including five of the top six.
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GameStop's $56B eBay Bid: What the 13D Tape Reveals
GameStop's $125-per-share offer for eBay was filed as an SC 13D on May 4 but rejected within days. Institutional ownership data shows why the bid was always going to be a stretch.
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Apple Chairman Levinson's $71M May Block: Cadence Read
Apple Chairman Arthur Levinson disposed of 250,000 AAPL shares on May 6, 2026 for cash proceeds of roughly $71.2 million. The single-day block runs 2.5 times the size of his prior quarterly cadence, and warrants closer reading than a routine plan tranche.
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Morningstar Founder Joe Mansueto: Decoding May Drip
Morningstar founder Joe Mansueto sold an identical 7,250-share block for five separate trading days in early May 2026. The cadence is a clean Rule 10b5-1 plan signature, and the disposition is small relative to his 37.5% beneficial-ownership disclosure.
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CrowdStrike CEO Kurtz: Reading the 10b5-1 Daily Drip
CrowdStrike CEO George Kurtz sold an identical 2,500-share block for four consecutive trading days in early May 2026 at prices ranging from $456 to $528. The cadence is the textbook signature of a Rule 10b5-1 plan, and it tells you more about plan design than it does about Kurtz's view of the stock.
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Musk's China Trip: A Read on Tesla's Cap Table
Elon Musk and Tim Cook are slated to join President Trump on a Beijing trip aimed at resetting US-China trade terms. Musk's 20.30% Tesla stake remains the largest single position on the cap table, freshly re-disclosed via SC 13G/A on April 23, 2026.
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Google's Googlebooks Bet: Reading the 13F Tape
Google has unveiled Googlebooks, a line of AI-native laptops built around Gemini. The institutional ownership tape behind Alphabet is one of the deepest on the market, and the most recent 13D/G filings reveal a still-relevant Brin stake plus the same Vanguard passive consolidation we are seeing on every mega-cap name.
- News
Bristol-Myers' $15.2B Hengrui Deal: Holder Read
Bristol-Myers Squibb has signed a licensing agreement with Hengrui Pharma worth up to $15.2 billion across 13 assets. The 13F ownership data shows two deep-value houses already running outsized concentrated positions in BMY before the pact landed.
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GM Cuts 500-600 IT Jobs: What Value-Fund Holders See
General Motors is laying off 500 to 600 information technology employees as it shifts work toward AI tooling. The 13F holder base tells a more nuanced story: a handful of value-oriented active managers continue to run outsized weights in the stock, and Vanguard just filed a new 13G disclosing 7.47% ownership.
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John Hess Sells $36M CVX Post-Merger: Cadence Read
John Hess sold $36M of CVX across May 6-7, 2026 — his second large post-merger distribution after a similar $35M November 2025 window. Cadence is consistent with a programmed founder liquidity plan, not opportunistic timing.
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Joe Mansueto's MORN May Sale: 37.5% Founder Stake Intact
Morningstar founder Joseph Mansueto sold ~$900K of MORN on 2026-05-07 across 8 micro-lot prints. His 13G beneficial ownership remains 37.5% (14.9M shares), with brother Daniel at 9.5% — a 47% combined family stake.
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Charles Schwab Sells $19M SCHW: Plan-Driven Cadence Read
Charles Schwab, the 88-year-old founder, sold $19.1M of SCHW Class A across 5 sessions in late April-May 2026 — at meaningfully lower prices than February. Holds 110M+ shares total via Form 4 Table I and Table II.
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RVMD Pancreatic Data: Nextech's 58% Portfolio Bet Validated
Revolution Medicines' daraxonrasib data suggests doubled survival in pancreatic cancer. The 13F filings reveal a holder base built around exactly this thesis: Nextech Invest at 58.5% portfolio weight, Paradigm Biocapital at 13.5%, Alphabet at $320M.
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SAP Sapphire 2026 AI Suite: WindAcre's 6.39% Conviction Bet
SAP's Autonomous Enterprise AI launch at Sapphire 2026 lands on a holder base with one defining tell: WindAcre Partnership runs SAP at 6.39% of its entire portfolio, treating the AI thesis as a top-three position.
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Amazon 30-Minute Delivery: How AMZN Active Holders Are Positioned
Amazon's 30-minute delivery rollout lands on a holder base where 16 of the top 20 institutional positions are active conviction money — not index flow. Fidelity and Capital Research lead with portfolio weights above 3.8%.