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InsiderTradesSIGMA

Multi-market insider intelligence. Official public filings, re-aggregated and scored. Private beta.

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Built in Paris. Public sources across 28 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. Prices + fundamentals via Yahoo Finance, STOXX 600 sector ETFs (iShares Xetra). Stack: Next.js 16, Prisma, Vercel. Live out-of-sample tracker since 2026-05-16. 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).

Theme: dark (range regime detected on CAC40 90d · as of 2026-05-25)

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CHEN ISAN | Insider Transactions

← Executives ★ Sign in to follow

CI

CHEN ISAN

Other

USUS·SEC (Form 4)

Tyra Biosciences, Inc.

0

Total declarations

0

Company

—

▲ Purchases (0 ops.)

—

▼ Sales (0 ops.)

Browse the complete record of transactions filed by CHEN ISAN. Officer active across 1 companies, notably Tyra Biosciences, Inc.. Aggregated, 2 disclosures have been published. Regulator: SEC (Form 4). All data is accessible without signup.

Declarations2 total

Executives●CTTyra Biosciences, Inc.9SEC

C

CHEN ISANDirector

61,444 shares

Common Stock

SEC:0000899243-21-036424·17 Sept 2021

Executives●CTTyra Biosciences, Inc.15SEC

C

CHEN ISANDirector

61,444 shares

Common Stock

SEC:0000899243-21-036424:0·17 Sept 2021

2 of 2 declarations

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Tyra Biosciences, Inc.

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