David J. Chang, Chief Medical Officer of Cabaletta Bio Inc ($CABA), made one open market purchase of company shares in the last 365 days, totaling $19,888. His most recent buy occurred on January 21, 2026. Among 4,983 insiders tracked for purchases, his activity ranks 3,857th by amount, below the average of $1.5 million across 3.3 transactions per insider. Chang reported no open market sales in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 2, 2026 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 225000 | $0.00 | 225,000.0000 | 96,265,204 | 9999.99% | 0.23% |
| Jan. 21, 2026 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | P | Common Stock | 8800 | $2.26 | 8,800.0000 | 96,265,204 | 9999.99% | 0.01% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | D | Stock Option (Right to Buy) | 48836 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.10% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 48836 | $0.00 | 48,836.0000 | 50,743,101 | 9999.99% | 0.10% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | D | Stock Option (Right to Buy) | 38238 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.08% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 38238 | $0.00 | 38,238.0000 | 50,743,101 | 9999.99% | 0.08% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | D | Stock Option (Right to Buy) | 113500 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.22% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 113500 | $0.00 | 113,500.0000 | 50,743,101 | 9999.99% | 0.22% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | D | Stock Option (Right to Buy) | 135000 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.27% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | D | Stock Option (Right to Buy) | 185709 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.37% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | D | Stock Option (Right to Buy) | 150000 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.30% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 150000 | $0.00 | 150,000.0000 | 50,743,101 | 9999.99% | 0.30% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | D | Stock Option (Right to Buy) | 130000 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.26% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 130000 | $0.00 | 130,000.0000 | 50,743,101 | 9999.99% | 0.26% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 135000 | $0.00 | 135,000.0000 | 50,743,101 | 9999.99% | 0.27% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 185709 | $0.00 | 185,709.0000 | 50,743,101 | 9999.99% | 0.37% |
| March 3, 2025 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 145000 | $0.00 | 145,000.0000 | 0 | 9999.99% | 0.00% |
| March 1, 2024 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 130000 | $0.00 | 130,000.0000 | 0 | 9999.99% | 0.00% |
| Jan. 18, 2023 | Cabaletta Bio, Inc. | $CABA | Chang David J. | Chief Medical Officer | A | Stock Option (Right to Buy) | 150000 | $0.00 | 150,000.0000 | 0 | 9999.99% | 0.00% |