Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Mary Haak-Frendscho files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- TCG Crossover GP II, LLC - $11.79M in SRZN purchases and sales in the last 12 months
- COLUMN GROUP III GP, LP - $5.98M in SRZN purchases and sales in the last 12 months
- Tim Kutzkey - $5.98M in SRZN purchases and sales in the last 12 months
- Craig C. Parker - $151K in SRZN purchases and sales in the last 12 months
- Charles O. Williams - $99K in SRZN purchases and sales in the last 12 months
- Yang Li - $75K in SRZN purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Mary Haak-Frendscho?
Mary Haak-Frendscho is a corporate insider of Surrozen, Inc./DE (SRZN). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Mary Haak-Frendscho last file a Form 4?
The only primary Form 4 on record is dated 14 May 2026.