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 (662)
- News
Rivian's R2 Production Headline Runs Through Amazon and 852 Institutions
RIVN moved into the news cycle, but the sharper read is the 852-holder institutional base behind the event.
- News
Intel's Earnings Rally Meets a 2,592-Holder Ownership Test
INTC moved into the news cycle, but the sharper read is the 2,592-holder institutional base behind the event.
- News
Alphabet's Anthropic Bet Lands Inside a 5,829-Holder Institutional Base
GOOGL moved into the news cycle, but the sharper read is the 5,829-holder institutional base behind the event.
- News
Exxon's Hormuz Oil-Price Risk Lands In A 4,798-Holder Stock
oil-price risk tied to the Strait of Hormuz returning to market headlines matters because XOM already sits inside a deep institutional holder base with 4798 tracked holders.
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Anthony Wood's $2.75M Roku Sale Needs the Table II Ownership Check
Anthony Wood sold $2.75M of Roku Class A stock before the April 30 earnings date, but Form 4 Table II still shows more than 16M shares of exposure.
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Wayfair's Way Day Sale Lands in a Stock With 481 Institutional Holders
Way Day is the consumer headline, but Wayfair's holder base is the investor story: 481 institutions, 19 active top-20 holders and five 13D/G records.
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Charles Schwab Founder Sales Need the Ownership Record, Not an Exit Label
Charles R. Schwab sold SCHW shares in early 2026, but Form 4 Table I and Table II show large remaining exposure while the company reported record Q1 results.
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Apple Succession Chatter Meets a 6,332-Holder AAPL Ownership Base
Tim Cook succession chatter is not landing in a thin stock. Apple has 6,332 tracked institutional holders and a top-five ownership stack anchored by index scale plus active giants.
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Microsoft AI Job-Cut Headlines Landed in One of the Market’s Deepest Holder Bases
Microsoft’s AI-era restructuring headlines look different when mapped against 6,496 institutional holders and a still-deep active-holder base.
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Ernest Garcia’s Carvana Form 4 Pattern Needs the Record-2025 Context
Carvana CEO Ernest Garcia III’s Form 4 history is material, but the better read is cadence, remaining ownership and institutional context after record 2025 results.
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UnitedHealth Prior Authorization Reform Meets a Deep Holder Base
Health insurers advanced prior authorization reforms, and UnitedHealth's 3,325-holder base shows why the next 13F update matters.
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Jayshree Ullal's April Arista Sales Look Planned, Not Like an Exit
Arista CEO Jayshree Ullal sold ANET shares in April, but the Form 4 trail points to a 10b5-1 plan and substantial remaining ownership.
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Matthew Prince’s Cloudflare Sale Was Planned, But the Form 4 Does Not Show an Exit
Cloudflare’s CEO sold Class A shares in April, but Table II and 13D/G data show retained beneficial ownership that changes the signal.
- News
Alphabet’s $40B Anthropic Headline Lands on a $494B Top-Holder Base
Alphabet’s reported Anthropic investment is best read against a deep institutional register already built around AI platform exposure.
- News
Microsoft’s AI Buyout Push Meets a $972B Top-Holder Base
Microsoft’s reported buyout push is less a simple layoff story than a test of how deep institutional AI sponsorship reacts to margin discipline.
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Power Integrations Director Balu Balakrishnan Kept Selling Into a Slower Chip Recovery
Balu Balakrishnan reported recent sales in POWI, but the signal depends on cadence, remaining ownership, and the company backdrop.
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Arista CEO Jayshree Ullal’s April Sales Meet an AI-Networking Holder Base
Jayshree Ullal reported recent sales in ANET, but the signal depends on cadence, remaining ownership, and the company backdrop.
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Nvidia’s $5 Trillion Milestone Shows How Crowded the AI Trade Has Become
Nvidia’s reported $5 trillion market value milestone gets a 13F ownership read-through: 6028 holders and 16 active top-20 holders shape the signal.
- News
Health Insurers’ Prior Authorization Reset Meets a Deep UNH Holder Base
the industry prior-authorization standardization push gets a 13F ownership read-through: 3325 holders and 17 active top-20 holders shape the signal.
- News
Meta’s AI Job Cuts Land on a Holder Base Built for Scale, Not Surprise
Meta’s reported AI-driven job cuts gets a 13F ownership read-through: 5288 holders and 16 active top-20 holders shape the signal.