Simon Mark bought Cabaletta Bio ($CABA) shares once on the open market in the last year, for a total of about $25,300. His most recent purchase was on January 21, 2026. Among nearly 5,000 insiders, his buying ranks 3,582nd by amount, well below the average of $1.5 million across 3.3 transactions per insider. He made no open market sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 21, 2026 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | P | Common Stock | 11061 | $2.28 | 154,205.0000 | 96,265,204 | 7.73% | 0.01% |
| June 9, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | A | Stock Option (Right to Buy) | 22000 | $0.00 | 22,000.0000 | 50,743,101 | 9999.99% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | D | Stock Option (Right to Buy) | 18460 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | D | Stock Option (Right to Buy) | 22000 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | A | Stock Option (Right to Buy) | 22000 | $0.00 | 22,000.0000 | 50,743,101 | 9999.99% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | D | Stock Option (Right to Buy) | 22000 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | A | Stock Option (Right to Buy) | 22000 | $0.00 | 22,000.0000 | 50,743,101 | 9999.99% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | D | Stock Option (Right to Buy) | 22000 | $0.00 | 0.0000 | 50,743,101 | 100.00% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | A | Stock Option (Right to Buy) | 22000 | $0.00 | 22,000.0000 | 50,743,101 | 9999.99% | 0.04% |
| May 19, 2025 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | A | Stock Option (Right to Buy) | 18460 | $0.00 | 18,460.0000 | 50,743,101 | 9999.99% | 0.04% |
| June 3, 2024 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Not found | A | Stock Option (Right to Buy) | 22000 | $0.00 | 22,000.0000 | 0 | 9999.99% | 0.00% |
| June 1, 2023 | Cabaletta Bio, Inc. | $CABA | Simon Mark | Director | A | Stock Option (Right to Buy) | 22000 | $0.00 | 22,000.0000 | 0 | 9999.99% | 0.00% |