Over the past 12 months, Cabaletta Bio insiders bought $296,189 of stock on the open market (132.07K shares) and made no open-market sales.
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Steven Nichtberger | President Ceo | 1,031,483 | 0 | 1,031,483 | 77.8% | 21 Jan, 2026 |
| 2 | Mark Simon | Director | 147,205 | 0 | 147,205 | 11.1% | 21 Jan, 2026 |
| 3 | Anup Marda | Chief Financial Officer | 50,000 | 0 | 50,000 | 3.8% | 18 Oct, 2022 |
| 4 | Gwendolyn Binder | President, Science Tech. | 31,312 | 0 | 31,312 | 2.4% | 21 Jan, 2026 |
| 5 | Shawn Tomasello | Director | 0 | 22,725 | 22,725 | 1.7% | 21 Jan, 2026 |
| 6 | Steve Gavel | Chief Commercial Officer | 22,170 | 0 | 22,170 | 1.7% | 21 Jan, 2026 |
| 7 | David J. Chang | Chief Medical Officer | 8,800 | 0 | 8,800 | 0.7% | 21 Jan, 2026 |
| 8 | Michael Gerard | General Counsel | 6,600 | 0 | 6,600 | 0.5% | 21 Jan, 2026 |
| 9 | Catherine Bollard | Director | 5,405 | 0 | 5,405 | 0.4% | 21 Jan, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 09 Jun, 2026 | Scott C. Brun | Director | Acquired A | 22,000 | $0.00 | $0 | 22,000 | Direct |
| 09 Jun, 2026 | Richard C Jr Henriques | Director | Acquired A | 22,000 | $0.00 | $0 | 22,000 | Direct |
| 09 Jun, 2026 | Shawn Tomasello | Director | Acquired A | 22,000 | $0.00 | $0 | 22,000 | Direct |
| 09 Jun, 2026 | Mark Simon | Director | Acquired A | 22,000 | $0.00 | $0 | 22,000 | Direct |
| 09 Jun, 2026 | Catherine Bollard | Director | Acquired A | 22,000 | $0.00 | $0 | 22,000 | Direct |
| 02 Mar, 2026 | Anup Marda | Chief Financial Officer | Acquired A | 225,000 | $0.00 | $0 | 225,000 | Direct |
| 02 Mar, 2026 | Arun Das | Chief Business Officer | Acquired A | 175,000 | $0.00 | $0 | 175,000 | Direct |
| 02 Mar, 2026 | Steven Nichtberger | President Ceo | Acquired A | 674,000 | $0.00 | $0 | 674,000 | Direct |
| 02 Mar, 2026 | David J. Chang | Chief Medical Officer | Acquired A | 225,000 | $0.00 | $0 | 225,000 | Direct |
| 02 Mar, 2026 | Gwendolyn Binder | President, Science Tech. | Acquired A | 225,000 | $0.00 | $0 | 225,000 | Direct |
| 02 Mar, 2026 | Michael Gerard | General Counsel | Acquired A | 175,000 | $0.00 | $0 | 175,000 | Direct |
| 21 Jan, 2026 | Michael Gerard | General Counsel | Acquired P | 6,600 | $2.27 | $14.98K | 6,600 | Direct |
| 21 Jan, 2026 | Mark Simon | Director | Acquired P | 11,061 | $2.28 | $25.26K | 147,205 | Direct |
| 21 Jan, 2026 | David J. Chang | Chief Medical Officer | Acquired P | 8,800 | $2.26 | $19.89K | 8,800 | Direct |
| 21 Jan, 2026 | Steven Nichtberger | President Ceo | Acquired P | 45,000 | $2.24 | $100.78K | 1,031,483 | Direct |
| 21 Jan, 2026 | Gwendolyn Binder | President, Science Tech. | Acquired P | 11,312 | $2.19 | $24.76K | 31,312 | Direct |
| 21 Jan, 2026 | Catherine Bollard | Director | Acquired P | 4,405 | $2.27 | $9.98K | 5,405 | Direct |
| 21 Jan, 2026 | Steve Gavel | Chief Commercial Officer | Acquired P | 22,170 | $2.27 | $50.22K | 22,170 | Direct |
| 21 Jan, 2026 | Shawn Tomasello | Director | Acquired P | 22,725 | $2.21 | $50.32K | 22,725 | Indirect |
| 13 Oct, 2025 | Steve Gavel | Chief Commercial Officer | Acquired A | 275,000 | $0.00 | $0 | 275,000 | Direct |