Debra Zack

Debra Zack is a declared insider at 2 companies (board member); the most frequent names are Exagen Inc. and Spero Therapeutics, Inc. Over a trading history stretching from 4 February 2022 to 3 August 2026, the count stands at 3 filings.

None of the filings is a plain purchase or sale on the open market; they cover grants, option exercises and other movements. Because grants and exercises are largely decided by remuneration plans, they are not counted as purchases here.

On 6 August 2026 came the latest disclosure, a share grant in Spero Therapeutics, Inc. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 3 days. For comparison, the SEC allows two business days to file a Form 4. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.