🕵️ Cabaletta BIO, Inc. ($CABA)
SEC insider & ownership activity, last 12 months · CIK 1759138 · every row links its SEC filing
Over the last 12 months insiders bought $296K with no open-market selling against it. Nichtberger Steven bought $101K in discretionary trades (Jan). Prudential Financial Inc added 8.9% → 11.4%; Jennison Associates LLC added 8.9% → 11.4%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
8 buyers, $296K (8 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Nichtberger Steven | 1 | $101K | 0 | – | Jan 21, 2026 |
| Tomasello Shawn | 1 | $50K | 0 | – | Jan 21, 2026 |
| Gavel Steve | 1 | $50K | 0 | – | Jan 21, 2026 |
| Simon Mark | 1 | $25K | 0 | – | Jan 21, 2026 |
| Binder Gwendolyn | 1 | $25K | 0 | – | Jan 21, 2026 |
| David J. Chang | 1 | $20K | 0 | – | Jan 21, 2026 |
| Gerard Michael | 1 | $15K | 0 | – | Jan 21, 2026 |
| Bollard Catherine | 1 | $10K | 0 | – | Jan 21, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Prudential Financial Inc | 11.4% | 13G | Jun 5, 2026 | filing ↗ | |
| Jennison Associates LLC | 11.4% | 13G | Jun 4, 2026 | filing ↗ | |
| T. ROWE Price Investment Management, Inc. | 10.2% | 13G | Feb 17, 2026 | filing ↗ | |
| BAIN Capital Life Sciences Opportunities III, LP | 10.0% | 13G | Aug 14, 2025 | filing ↗ | |
| Adage Capital Management, L.P. | 10.0% | 13G | Aug 12, 2025 | filing ↗ | |
| Robert Atchinson | 10.0% | 13G | Aug 12, 2025 | filing ↗ | |
| Phillip Gross | 10.0% | 13G | Aug 12, 2025 | filing ↗ | |
| Cormorant Asset Management, LP | 9.0% | 13G | May 15, 2026 | filing ↗ | |
| Bihua Chen | 9.0% | 13G | May 15, 2026 | filing ↗ | |
| Blackrock, Inc. | 5.9% | 13G | Jul 27, 2026 | filing ↗ | |
| Millennium Management LLC | exited | 13G | Jul 23, 2026 | filing ↗ | |
| Millennium Group Management LLC | exited | 13G | Jul 23, 2026 | filing ↗ | |
| Israel A. Englander | exited | 13G | Jul 23, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Charter/bylaw changes (5.03) | Jun 9, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 9, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 9, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 3, 2026 | filing ↗ |
| Other events (8.01) | Jun 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 3, 2026 | filing ↗ |
| Earnings (2.02) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 14, 2026 | filing ↗ |
| Other events (8.01) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Material agreement (1.01) | May 4, 2026 | filing ↗ |
| Earnings (2.02) | May 4, 2026 | filing ↗ |
| Other events (8.01) | May 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 4, 2026 | filing ↗ |
| Other events (8.01) | May 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 4, 2026 | filing ↗ |
| Other events (8.01) | Apr 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 20, 2026 | filing ↗ |
| Earnings (2.02) | Mar 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 23, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 23, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 12, 2026 | filing ↗ |
| Other events (8.01) | Jan 12, 2026 | filing ↗ |
| Earnings (2.02) | Nov 10, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 10, 2025 | filing ↗ |
| Other events (8.01) | Oct 29, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 29, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Oct 27, 2025 | filing ↗ |
| Other events (8.01) | Oct 27, 2025 | filing ↗ |