Recent insider trading activity for ATTO. The table below shows the latest reported SEC Form 4 transactions from officers, directors, and 10% owners. Each row includes the transaction type, share count, price, and our proprietary signal score that highlights potentially significant activity. Curious how the scores are calculated? Read our methodology.
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| Insider | Type | Shares | Price | Score | Date |
|---|---|---|---|---|---|
| GOLDMAN SACHS GROUP INC | P | 500000 | $17.00 | 60 | 2026-08-06 |
| GOLDMAN SACHS GROUP INC | C | 478498 | $- | 20 | 2026-08-06 |
| GOLDMAN SACHS GROUP INC | C | 1957134 | $- | 20 | 2026-08-06 |
| WALSH COLIN | P | 500000 | $17.00 | 70 | 2026-08-06 |
| WALSH COLIN | C | 478498 | $- | 30 | 2026-08-06 |
| WALSH COLIN | C | 1957134 | $- | 30 | 2026-08-06 |
| Deep Track Biotechnology Master Fund, Ltd. | C | 1957138 | $- | 20 | 2026-08-06 |
| Redmile Group, LLC | P | 400000 | $17.00 | 70 | 2026-08-06 |
| Redmile Group, LLC | P | 200000 | $17.00 | 65 | 2026-08-06 |
| Redmile Group, LLC | C | 782854 | $- | 20 | 2026-08-06 |
| Sanofi | P | 300000 | $17.00 | 65 | 2026-08-06 |
| Sanofi | C | 782855 | $- | 20 | 2026-08-06 |
| Frazier Life Sciences XI, L.P. | P | 588235 | $17.00 | 60 | 2026-08-06 |
| Frazier Life Sciences XI, L.P. | C | 961322 | $- | 20 | 2026-08-06 |
| Frazier Life Sciences XI, L.P. | C | 1189940 | $- | 20 | 2026-08-06 |
| Frazier Life Sciences XI, L.P. | C | 1590175 | $- | 20 | 2026-08-06 |
| Frazier Life Sciences XI, L.P. | C | 1749192 | $- | 20 | 2026-08-06 |
| GOLDMAN SACHS GROUP INC | S | 76418 | $21.04 | 40 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 6763 | $21.61 | 25 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 100 | $21.99 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 1163 | $22.19 | 17 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 700 | $22.07 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 200 | $22.05 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 443 | $21.78 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 300 | $20.84 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 1040 | $22.05 | 17 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 1180 | $21.84 | 17 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 400 | $22.02 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 6970 | $22.03 | 25 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 672 | $22.02 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 753 | $21.97 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 100 | $22.11 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 480 | $21.55 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 200 | $22.10 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 3402 | $22.02 | 20 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 1556 | $22.06 | 17 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 200 | $22.05 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 1332 | $22.03 | 17 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 447 | $21.87 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | S | 988 | $22.03 | 14 | 2026-08-05 |
| GOLDMAN SACHS GROUP INC | P | 85000 | $21.00 | 60 | 2026-08-05 |
| WALSH COLIN | S | 76418 | $21.04 | 50 | 2026-08-05 |
| WALSH COLIN | S | 6763 | $21.61 | 35 | 2026-08-05 |
| WALSH COLIN | S | 100 | $21.99 | 24 | 2026-08-05 |
| WALSH COLIN | S | 1163 | $22.19 | 27 | 2026-08-05 |
| WALSH COLIN | S | 700 | $22.07 | 24 | 2026-08-05 |
| WALSH COLIN | S | 200 | $22.05 | 24 | 2026-08-05 |
| WALSH COLIN | S | 443 | $21.78 | 24 | 2026-08-05 |
| WALSH COLIN | S | 300 | $20.84 | 24 | 2026-08-05 |
| WALSH COLIN | S | 1040 | $22.05 | 27 | 2026-08-05 |
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Guide
What is SEC Form 4?
How insider trading filings work and what they reveal about stock momentum.
Guide
Congressional Stock Trades
How the STOCK Act discloses trades by elected officials and why they matter.
Guide
What is a 13F Filing?
How institutions report quarterly holdings and what their moves can signal.
Methodology
How DisclosureSignals Ranks Trades
The data sources, scoring logic, and thresholds behind every alert.
Learn more
- What is SEC Form 4? — how insider trades are reported and what the fields mean.
- Congressional stock trades — how elected officials disclose their market activity.
- What is a 13F filing? — how institutional investors report quarterly holdings.
- Signal methodology — how we score transactions and filter noise.
- Plans & pricing — unlock watchlists, alerts, and full history.
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