Summary
Updated Aug 30, 2026
Mark Simon files SEC Form 4 reports at Cabaletta Bio, Inc. (CABA). 2 SEC Form 4 filings on record, most recently on 10 June 2026. Most recent open-market trade: bought $25K of CABA on 21 January 2026. Lifetime open-market purchases: $25K.
Recent Transactions
1Every recent SEC Form 4 transaction Mark Simon has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark Simon 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.
- Steven Nichtberger - $101K of CABA open-market activity in the last 12 months
- Shawn Tomasello - $50K of CABA open-market activity in the last 12 months
- Steve Gavel - $50K of CABA open-market activity in the last 12 months
- Gwendolyn Binder - $25K of CABA open-market activity in the last 12 months
- David J. Chang - $20K of CABA open-market activity in the last 12 months
- Michael Gerard - $15K of CABA open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Mark Simon?
Mark Simon is a corporate insider of Cabaletta Bio, Inc. (CABA). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mark Simon submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Mark Simon been buying or selling stock?
Recorded transactions: 1 open-market purchase ($25K) and 0 open-market sales across all tracked filings.
Where can I see all of Mark Simon's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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