Question 1

What are insider transactions?

Accepted Answer

Insider transactions are stock purchases and sales by company officers, directors, and 10% shareholders, disclosed via SEC Form 4 filings within two business days of the transaction.

Question 2

What does insider buying signal?

Accepted Answer

Open-market insider buying is generally interpreted as a positive signal because insiders typically only buy if they believe the stock will rise. Selling can occur for many reasons including diversification, taxes, or 10b5-1 plans, so it's a less reliable signal than buying.

Gritstone Oncology Inc

Gritstone Oncology Inc (GRTS) Insider transactions

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