Over the 90-day window ending February 07, 2026, Cabaletta Bio's three dominant insider ownership positions are held by President & Ceo Steven Nichtberger (1.03Mn shares), TenPercentOwner Ventures V, L.P. 5am (333.14K shares), Director Mark Simon (154.21K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Steven Nichtberger | President & Ceo | 1,031,483 | 21 Jan, 2026 |
| Ventures V, L.P. 5am | 333,144 | 03 Nov, 2021 | |
| Mark Simon | 154,205 | 21 Jan, 2026 | |
| Anup Marda | Chief Financial Officer | 50,000 | 18 Oct, 2022 |
| Gwendolyn Binder | President And Science & Tech. | 31,312 | 21 Jan, 2026 |
| Shawn Tomasello | 22,725 | 21 Jan, 2026 | |
| Steve Gavel | Chief Commercial Officer | 22,170 | 21 Jan, 2026 |
| David J. Chang | Chief Medical Officer | 8,800 | 21 Jan, 2026 |
| Michael Gerard | General Counsel | 6,600 | 21 Jan, 2026 |
| Catherine Bollard | 5,405 | 21 Jan, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 21 Jan, 2026 | Mark Simon | Common Stock | A | 11,061 | $2.28 | 147,205 | D | P |
| 21 Jan, 2026 | Steven Nichtberger | Common Stock | A | 45,000 | $2.24 | 1,031,483 | D | P |
| 21 Jan, 2026 | Shawn Tomasello | Common Stock | A | 22,725 | $2.21 | 22,725 | I | P |
| 21 Jan, 2026 | Catherine Bollard | Common Stock | A | 4,405 | $2.27 | 5,405 | D | P |
| 21 Jan, 2026 | David J. Chang | Common Stock | A | 8,800 | $2.26 | 8,800 | D | P |
| 21 Jan, 2026 | Gwendolyn Binder | Common Stock | A | 11,312 | $2.19 | 31,312 | D | P |
| 21 Jan, 2026 | Michael Gerard | Common Stock | A | 6,600 | $2.27 | 6,600 | D | P |
| 21 Jan, 2026 | Steve Gavel | Common Stock | A | 22,170 | $2.26 | 22,170 | D | P |
| 19 Jan, 2024 | Gwendolyn Binder | Common Stock | A | 11,000 | $1.01 | 31,000 | D | M |
| 19 Jan, 2024 | Gwendolyn Binder | Common Stock | D | 10,300 | $19.54 | 20,700 | D | S |
| 19 Jan, 2024 | Gwendolyn Binder | Common Stock | D | 700 | $20.33 | 20,000 | D | S |
| 19 Dec, 2023 | Gwendolyn Binder | Common Stock | D | 3,132 | $22.22 | 20,000 | D | S |
| 19 Dec, 2023 | Gwendolyn Binder | Common Stock | A | 11,000 | $1.01 | 31,000 | D | M |
| 19 Dec, 2023 | Gwendolyn Binder | Common Stock | D | 7,868 | $21.76 | 23,132 | D | S |
| 20 Nov, 2023 | Gwendolyn Binder | Common Stock | D | 7,458 | $18.02 | 20,000 | D | S |
| 20 Nov, 2023 | Gwendolyn Binder | Common Stock | D | 3,542 | $17.39 | 27,458 | D | S |
| 20 Nov, 2023 | Gwendolyn Binder | Common Stock | A | 11,000 | $1.01 | 31,000 | D | M |
| 19 Oct, 2023 | Gwendolyn Binder | Common Stock | D | 10,592 | $13.32 | 20,408 | D | S |
| 19 Oct, 2023 | Gwendolyn Binder | Common Stock | D | 408 | $14.28 | 20,000 | D | S |
| 19 Oct, 2023 | Gwendolyn Binder | Common Stock | A | 11,000 | $1.01 | 31,000 | D | M |