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Fin
Echo
Markets
Dashboard
Search
Fear & Greed
Tools
Watchlist
Budget
Context
Upcoming
Notifications
Upcoming
Research
News
Market Events
Economy
SEC Filings
Finecho Content
ERWIN MARION JOHNSTON JR.
Private
CIK: 2152052
Location
SOUTH SAN FRANCISCO, CA
Insider Of
1
Name & Role
Position
Tenure
Holdings
TREX BIO, INC.
Chief Executive Officer
Since Oct 2026
—
TREX BIO, INC.
Position
Chief Executive Officer
Tenure
Since Oct 2026
Holdings
—