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ATTO • CIK 0002058707
Loading insider transactions…
People and entities that have reported ownership via Form 3, 3/A, 4, 4/A, 5, 5/A
Parsed transactions from Form 4 (and 3/5) filings (past year)
17 transactions · 3.73M shares
$64.90M total value
69 transactions · 317.42K shares
$6.75M total value
18 transactions · 42.75M shares
| Filing Date | Insiders | Transactions | Filing |
|---|---|---|---|
| Oct 8, 2026 | Chan Steven | Grant/Award: 140.00K shares | View |
| Oct 8, 2026 | Fu Tao | Grant/Award: 538.30K shares | View |
| Aug 28, 2026 | WALSH COLIN | Bought 585.00K @ $17.5812/share ($10.29M) Sold 105.81K @ $21.2808/share ($2.25M) Conversion of Derivative: 2.44M | View |
| Aug 28, 2026 | WSLS EMP ONSHORE INVESTMENTS, L.P. | Bought 690.81K @ $18.1427/share ($12.53M) Sold 105.81K @ $21.2808/share ($2.25M) Conversion of Derivative: 25.06M | View |
| Aug 13, 2026 | WALSH COLIN | Bought 585.00K @ $17.5812/share ($10.29M) Sold 105.81K @ $21.2808/share ($2.25M) Conversion of Derivative: 2.44M | View |
| Aug 10, 2026 | KROIN DAVID | Conversion of Derivative: 1.96M | View |
| Aug 10, 2026 | venBio Global Strategic Fund IV, L.P. | Bought 382.35K @ $17.00/share ($6.50M) Conversion of Derivative: 3.80M | View |
| Aug 7, 2026 | Sanofi | Bought 300.00K @ $17.00/share ($5.10M) Conversion of Derivative: 782.86K | View |
| Aug 7, 2026 | Redmile Biopharma Investments III, L.P. | Bought 600.00K @ $17.00/share ($10.20M) Conversion of Derivative: 782.85K | View |
| Aug 6, 2026 | — | — | View |
| Aug 6, 2026 | FHMLS XI, L.L.C. | Bought 588.24K @ $17.00/share ($10.00M) Conversion of Derivative: 5.49M | View |
| Aug 6, 2026 | — | — | View |
| Aug 6, 2026 | — | — | View |
| Aug 6, 2026 | — | — | View |