Insider Monitorby Slow Compounding
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Insider transactions · Sweden & USA

See what insiders do with their own money.

Every purchase and sale that executives and board members have to report, from the SEC and Finansinspektionen. Checked, cleaned up and in your inbox within the hour.

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Data straight from the regulators

SEC EDGARForm 3 & 4 · USA
FinansinspektionenInsider register · Sweden
European Central BankDaily reference rates
Slow CompoundingAnalysis & newsletter

Product

Three questions every insider filing should answer.

Raw filings are long tables full of codes. Insider Monitor sorts them so you see within seconds whether a trade matters.

HEICO · EUR m per month2023–2026

Who is buying, who is selling?

Buys and sells per day, week or month, in euro, dollar or krona. Click a bar to see the people behind it.

Form 4 · 8 Oct 2026Cluster · 8 insiders
Mendelson Victor HCo-CEO · 795 × $220.30Purchase
Neitzel JulieBoard member · 592 × $294.93Purchase
Schriesheim AlanBoard member · 795 × $220.30Purchase
Fine Carol F.Board member · 795 × $220.30Purchase

Are several buying at once?

Three or more insiders buying within 30 days, and the director buying for the first time in years, are flagged automatically.

Mendelson Victor H · HEICOas of 8 Oct 2026
Common Stock2,149,484
Class A Common Stock671,871
of which probably shared: 189,030

How much do they really hold?

Direct and indirect holdings over time, split by trust, company and share class, with a note where a holding is likely shared.

Watchlist analytics

Your whole watchlist, analysed as one.

Switch to “Watchlist” and every chart, table and metric covers all your companies at once. See in seconds where insiders are buying across your portfolio.

20companies
2,086filings in 3 years
9cluster buys
  • One chart for all companiesBuys and sells across your watchlist per month, in one currency, Sweden and the USA together.
  • Cluster buys across the watchlistWhich of your companies see several insiders buying at the same time.
  • Ranked by convictionWho has put the most money in, with first buys flagged, across all companies.
  • Alerts for every companyOne e-mail per company as soon as a new filing comes in.
Screenshot: aggregated dashboard for a watchlist of 20 companies over three years
Screenshot: cluster buys across all watchlist companies
Screenshot: cumulative buys and sells per insider across the watchlist

A look inside

This is what the tool looks like.

Real screenshots of Insider Monitor, here with HEICO. Five things you won’t find like this on the free insider sites.

Click to enlarge Screenshot: dashboard with filters, HEICO, last 12 months Screenshot: cluster buys and cumulative view, HEICO Screenshot: insider holdings over time, HEICO Screenshot: current holdings per insider with shared holdings, HEICO Screenshot: individual filings, HEICO

How it works

From the regulator to your inbox.

1

The filing arrives

Every hour, Insider Monitor collects new Form 4 filings from SEC EDGAR and new entries from the Swedish insider register. History: USA since 2006, Sweden since 2016.

2

Checked and cleaned up

Duplicate reports from joint filers, plan transactions and obvious typos are recognised. Even errors in the authorities' own bulk files are corrected.

3

You get the signal

An e-mail for each company on your watchlist, plus alerts for cluster buys and trades above your threshold. With a link to the original filing.

Everything included

Built for long-term investors.

No trading signals, no hype. Context for your own analysis, from the author of Slow Compounding.

First buy in years

When a director buys for the first time since the data begins.

Role filter

CEO, CFO, other executives, board, or companies only.

Minimum amount

Hide small trades, in the currency of your choice.

Three currencies

EUR, USD and SEK at the ECB rate of the trade date.

Share classes

Common, Class A and others shown separately where it matters.

Insider sentiment

Buyers versus sellers and net shares bought per company.

CSV and image export

Data for your spreadsheet, charts for your own articles.

Source on every line

One click to the original filing at the SEC or FI.

9.97mUS filing lines since 2006
169,077Swedish filings since 2016
1 hfrom filing to alert
100 %of filings in the audited SEC quarters present

Plans

Three plans. Start free.

Upgrade or cancel at any time. Paid Slow Compounding subscribers get Pro included.

Free

Get to know it

0 €forever

For anyone who looks into insider data now and then.

  • Dashboard for Sweden and the USA
  • Filings with a 7-day delay
  • Last 12 months
  • Watchlist with up to 10 companies
  • Link to every original filing
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Pro

Stay informed

12 €per month

For private investors who follow their companies closely.

  • Everything in Free, plus
  • New filings hourly, no delay
  • Full history: USA since 2006, Sweden since 2016
  • E-mail alerts for watchlist and cluster buys
  • Holdings per insider over time
  • 3 watchlists

Included in the paid Slow Compounding subscription.

Start Pro

Research

Dig deeper

29 €per month

For writers, analysts and anyone doing their own research.

  • Everything in Pro, plus
  • CSV export of any selection
  • Screener by role and minimum amount
  • Insider metrics per share class
  • Charts as images for your own articles
  • 10 watchlists
Start Research

Already a paid Slow Compounding subscriber? Sign up with the same e-mail address and Pro is unlocked automatically.

FAQ

Common questions

Where does the data come from?

From the mandatory filings that insiders submit: in the USA SEC Form 3 and Form 4 via EDGAR, in Sweden the Finansinspektionen insider register. New filings are loaded every hour.

Is this investment advice?

No. Insider Monitor presents public filings and makes no recommendations. Insiders buy and sell for many reasons; the tool gives you context for your own decisions.

How reliable are the numbers?

As reliable as the filings themselves, and checked on top. A repeatable audit compares samples with the originals at the SEC and FI. Obvious mistakes by filers are marked as implausible and not counted. The original is always one click away.

Which countries are covered?

Sweden and the USA today. Germany (BaFin) and the Netherlands (AFM) are planned.

How do I get Pro with my Substack subscription?

Sign up with the e-mail address of your paid Slow Compounding subscription. Pro is unlocked automatically and stays active as long as the subscription runs.

Can I cancel at any time?

Yes. Monthly plans end at the end of the month, yearly plans at the end of the year. Your watchlists stay saved in the free plan.

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The next insider buy in your inbox.

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