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Red Flags

Filings a company makes when something has gone wrong, or is about to: a missed reporting deadline (NT 10-K/Q), a delisting from its exchange (Form 25), a deregistration that ends SEC reporting altogether (Form 15), or an insider's notice of intent to sell restricted stock (Form 144). Any one can be routine — Form 144s are filed constantly, and a late filing is sometimes just a late filing — so what is worth reading here is the pattern and the timing.

Insider sale notices · 202
Info Boulding Mark Elliott filed notice of proposed sale October 09, 2026

192 shares · $12,339 · via Fidelity Brokerage Services LLC · Officer

Info Section Six Partners, L.P. filed notice of proposed sale October 07, 2026

10,000 shares · $643,500 · via Merrill Lynch · Affiliate of Director

200 more red-flag filings behind a free account

See every red-flag filing PTC Therapeutics, Inc. has made, with the filing behind each one.

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