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Built in Paris. Public sources across 43 markets: AMF France, SEC EDGAR Form 4 US, BaFin Germany, SIX SER Switzerland, RNS United Kingdom, SEDI Canada, Consob Italy, CNMV Spain, AFM Netherlands, FSMA Belgium, Oslo Bors Norway, Nasdaq Helsinki, Nasdaq Copenhagen, ASX Australia, FMA Austria, CVM Brazil, HKEX Hong Kong, BSE-Sofia Bulgaria, Tadawul Saudi Arabia, DART South Korea, EDINET Japan, SSE and SZSE China, SEBI India, KNF Poland, PSE Philippines, NZX New Zealand, JSE South Africa, among others. Prices + fundamentals via Yahoo Finance, STOXX 600 sector ETFs (iShares Xetra). Stack: Next.js 16, Prisma, Vercel. Live out-of-sample tracker since 2026-05-27. Methodology audits: /methodologie and /docs/method-review/.

Sources: official public filings under MAR Art.19 (EU and EEA), SEC Section 16 / Form 4 (US), Art.56 SESTA (CH, SIX SER), NI 55-104 / SEDI (CA), Corporations Act s205G (AU) and equivalent regimes. Signals on this site are for educational use only and do not constitute investment advice within the meaning of MiFID II / SEC Reg-IA. Past performance does not guarantee future results. Swiss SIX SER filings are anonymised by law (role only, no name).

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Sigma Journal, insider research, quant studies, transparency · page 41

Sigma Journal

When insiders speak, we transcribe.

Long-form, data-driven studies on 1.6M+ filings across 43 markets. Comparative regulation, walk-forward backtests, profiles, market mechanics.

780

published studies

1.6M+

filings analysed

43

markets covered

All Regulation & Transparency Quant & Backtests Insider Profiles Market Mechanics Engineering Industry Analysis Newsletter

Market Mechanics

Everpure CEO sells EUR 4.6m as AI storage stays hot

Everpure CEO Giancarlo Charles H sold EUR 4.6m in July as AI storage stays in focus, with NetApp and Dell as the comparison set.

Jul 14, 20269 min

Market Mechanics

How to Read an Insider Transaction: a Field-by-Field Guide

Who bought, what, how much, when, under which rules: a practical guide to reading one insider filing, from Form 4 codes to cluster buys.

1 2 3 4 5 6 7 8 9 10 11

Jul 14, 20267 min

Market Mechanics

POET director Glen Riley buys EUR 41,254 as AI photonics runs hot

POET director Glen Riley bought EUR 41,254 on July 13 as AI photonics peers ripped higher. Here is how the filing fits the setup.

Jul 13, 202613 min

Market Mechanics

MDA Space: 2 senior buys after the CLS deal

Two senior officers bought MDA Space after the CLS acquisition and financing hit the stock. Here is the sector read, the cluster, and the risk.

Jul 13, 202611 min

Market Mechanics

AUBEPAR’s July 13 sale at ABC Arbitrage, read in context

ABC Arbitrage’s board-level seller trimmed into a quiet quant backdrop. Here is what the July 13 filing says, and what it does not.

Jul 13, 20269 min

Market Mechanics

Séché Environnement: 3 CEO buys and a EUR 231k cluster

Three CEO buys on 13 July total EUR 231,284 at Séché Environnement, as waste services trade against tighter ECB policy and a softer French backdrop.

Jul 13, 20269 min

Market Mechanics

ASML before July 15, while Lam keeps ripping

ASML heads into July 15 earnings with EUV demand still firm, buybacks running, and no fresh insider trades, while Lam Research keeps outrunning it.

Jul 13, 20268 min

Market Mechanics

Deutsche Bank at 31.35 euros, with no insider prints

Deutsche Bank held near 31.35 euros as Europe banks stayed firm, while the latest filing record shows no recent insider trades to read.

Jul 13, 20268 min

Market Mechanics

Bayer vs Novartis: Apollo’s €3bn deal and Roundup

Bayer’s Apollo capital deal and fresh Roundup push set the tone, while Novartis and Sanofi keep the pharma M&A backdrop hot.

Jul 13, 202610 min

Market Mechanics

BASF’s €5.8bn coatings sale resets the stock’s case

BASF closed its €5.8bn coatings sale, kept 40% of Surventis, and trades against a weak chemicals backdrop with no fresh insider buys.

Jul 13, 20268 min

Market Mechanics

Allianz versus AXA after 1,800 AI-linked job cuts

Allianz is cutting up to 1,800 jobs at Allianz Partners as AI bites into service work. Here is how that stacks up against AXA and the sector.

Jul 13, 20269 min

Market Mechanics

Black Diamond’s July 11 buy cluster totals EUR 11.6m

Black Diamond Group drew a July 11 insider buy cluster from the Kernaghan group. The stock has run hard, and the cohort math is less tidy.

Jul 13, 202610 min