How to Read Congress Stock Disclosures: The Micron (MU) Example
A plain-language walkthrough of STOCK Act filings — what they actually tell you, what they don't, and how to track them without reading hundreds of PDFs.
Between February and May 2026, five members of Congress disclosed purchases of Micron Technology (MU). By the time those filings became public, MU had already risen sharply — and that's completely normal. This guide walks through one real cluster step by step, then shows how Insider Alpha turns those PDFs into something you can search and filter.
What Congress has to disclose
The STOCK Act and Periodic Transaction Reports (PTRs).
Since 2012, the STOCK Act requires members of Congress to report stock trades within 45 days. Most filings appear as PTRs on the House Clerk's site or the Senate disclosure portal.
These are delayed, self-reported summaries — not real-time alerts. Still, the data is public and worth tracking, especially when several members buy the same ticker in a short window.
What a filing actually tells you
- Transaction date — when the trade happened.
- Filing date — when the PTR was submitted (the gap is filing lag).
- Amount range — buckets like "$1,001 – $15,000", not exact shares.
- Owner — member, spouse (SP), or dependent (DC).
Why filing lag changes everything
John Fetterman's MU buy shows a 4-day lag; Cleo Fields' shows 21 days. At Insider Alpha we score outcomes on a public-entry track — filing date plus one trading day — so returns reflect what a regular investor could realistically capture.
Recent MU purchases in our database
Public-entry returns — filing date + 1 trading day.
See every MU disclosure on the MU ticker page.
Try it yourself — free
Members get ML-graded signal scores and a daily email digest when clusters like MU hit the feed.
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