Mark Simon
Director at Cabaletta Bio, Inc. (CABA)
Mark Simon has filed 8 insider reports with the SEC since June 2022, as director at Cabaletta Bio, Inc. (CABA). In the last 12 months Mark Simon bought $25.3K of stock on the open market. The latest filing, on June 10, 2026, reports grant or award at Cabaletta Bio, Inc. (CABA).
- Filings
- 8
- Companies
- 1
- Bought on market
- $147K
- Sold on market
- None
Companies where Mark Simon is an insider
| Company | Role | Shares held | Bought | Sold | Avg buy | Price now | Last filing |
|---|---|---|---|---|---|---|---|
| Director | 147,205 | $147K | $1.08 | $1.28+19% | Jun 10, 2026 |
Shares held: common shares owned directly after the latest filing that states it. Avg buy: open-market purchase dollars divided by shares bought, every filing on record. Price now: the latest daily close, against the average buy price.
Every filing
- Jun 9, 2026CABASEC Form 4 filed by Director Simon MarkForm 4Grant or award
- Jan 21, 2026+$25.3KCABADirector Simon Mark bought $25,261 worth of shares (11,061 units at $2.28), increasing direct ownership by 8% to 147,205 unitsForm 4/AOpen-market purchase
- Jun 9, 2025CABASEC Form 4 filed by Director Simon MarkForm 4Grant or award
- May 19, 2025CABASEC Form 4 filed by Director Simon MarkForm 4Grant or awardSale back to the company
- Jun 3, 2024CABASEC Form 4 filed by Simon MarkForm 4Grant or award
- Jun 1, 2023CABASEC Form 4 filed by Simon MarkForm 4Grant or award
- Oct 18, 2022+$122KCABASEC Form 4: Simon Mark bought $122,121 worth of shares (125,000 units at $0.98), increasing direct ownership by 650% to 136,144 unitsForm 4Open-market purchase
- Jun 1, 2022CABASEC Form 4 filed by Simon MarkForm 4Grant or award
Compare Mark Simon with
- Mark Simon vs Shawn Tomasello1 shared
- Mark Simon vs Richard C Henriques Jr1 shared
- Mark Simon vs Catherine Bollard1 shared
- Mark Simon vs Scott C. Brun1 shared
- Mark Simon vs Arun Das1 shared
- Mark Simon vs Michael Gerard1 shared
Other insiders at the same companies
- Shawn TomaselloCABA
- Richard C Henriques JrCABA
- Catherine BollardCABA
- Scott C. BrunCABA
- Arun DasCABA
- Michael GerardCABA
- Gwendolyn BinderCABA
- David J. ChangCABA
- Steven NichtbergerCABA
- Anup MardaCABA
- Steve GavelCABA
Questions about Mark Simon
- What is Mark Simon's role at Cabaletta Bio, Inc.?
- Mark Simon reports to the SEC as director at Cabaletta Bio, Inc. (CABA), according to the latest filing on June 10, 2026.
- How many shares does Mark Simon own?
- After the latest filing that states it, Mark Simon directly owned 147,205 shares of Cabaletta Bio, Inc. (CABA). Shares held through trusts, funds or family members are reported separately and are not counted here.
- Has Mark Simon bought or sold stock recently?
- The most recent open-market purchase was on January 21, 2026: bought 11,061 shares of Cabaletta Bio, Inc. (CABA) for $25.3K at an average of $2.28.
- How do I get alerts when Mark Simon files?
- Follow Mark Simon on Quantisnow and you get an email, and a phone notification on Plus, within minutes of each new Form 4 or Form 5, and of each Form 144 notice of a planned sale.
From SEC Forms 3, 4, 5 and 144 filed by Mark Simon (SEC CIK 0001400717). Totals count each trade once, skipping amendments whose original is on file, from Jun 3, 2022 on. View on SEC EDGAR