Debra Zack

Chief Medical Officer, Exagen Inc.

Companies

Spero Therapeutics, Inc.Chief Medical Officer Aug 6, 2026 to now¹
Exagen Inc.Chief Medical Officer Mar 26, 2020 to Mar 2, 2022²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

Exagen Inc. XGN84,259 shares³$723.4K at $8.59Mar 1, 2022
Spero Therapeutics, Inc. SPRO162,311 shares⁴$185.0K at $1.14Aug 3, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

Aug 3, 2026Granted 162,311 shares of Spero Therapeutics, Inc.⁴
Mar 1, 2022Shares withheld for tax 3,241 shares at $7.12 of Exagen Inc.³
Feb 4, 2022Granted 50,000 shares of Exagen Inc.⁵

Sources

The numbers on this page point here. Each one links to the record it came from.

1
SEC EDGARSpero Therapeutics, Inc., Chief Medical Officer
2
SEC EDGARExagen Inc., Chief Medical Officer
3
SEC EDGARExagen Inc. shares after the filing of Mar 1, 2022
4
SEC EDGARSpero Therapeutics, Inc. shares after the filing of Aug 3, 2026
5
SEC EDGARForm 4 filed Feb 8, 2022