ATTO: Congress and insider trades
Who in Congress and inside the company traded ATTO, when each filing appeared, and what buying after each one would have earned against the S&P 500.
Key Facts
- ATTO is a listed stock.
- Insiders filed 9 open market buys worth $52M and 2 sells worth $4.5M, the latest filed 2026-08-13 (13 August 2026).
- 1 cluster buy of ATTO by three or more insiders within 30 days.
- Data as of 2026-09-29 (29 September 2026).
Insider trades in ATTO
as of 2026-08-13| Filed | Insider | Type | Shares | Price | Value | 90 day vs S&P |
|---|---|---|---|---|---|---|
| 13 Aug 2026 | GOLDMAN SACHS GROUP INC | buy | 500,000 | $17.00 | $8.5M | n/a |
| 13 Aug 2026 | GOLDMAN SACHS GROUP INC | buy | 85,000 | $21.00 | $1.8M | n/a |
| 13 Aug 2026 | GOLDMAN SACHS GROUP INC | sell | 105,807 | $21.28 | $2.3M | n/a |
| 13 Aug 2026 | WALSH COLIN | sell | 105,807 | $21.28 | $2.3M | n/a |
| 13 Aug 2026 | WALSH COLIN | buy | 500,000 | $17.00 | $8.5M | n/a |
| 13 Aug 2026 | WALSH COLIN | buy | 85,000 | $21.00 | $1.8M | n/a |
| 10 Aug 2026 | venBio Global Strategic Fund I | buy | 382,352 | $17.00 | $6.5M | n/a |
| 7 Aug 2026 | Sanofi | buy | 300,000 | $17.00 | $5.1M | n/a |
| 7 Aug 2026 | Redmile Group, LLC | buy | 200,000 | $17.00 | $3.4M | n/a |
| 7 Aug 2026 | Redmile Group, LLC | buy | 400,000 | $17.00 | $6.8M | n/a |
| 6 Aug 2026 | Frazier Life Sciences XI, L.P. | buy | 588,235 | $17.00 | $10.0M | n/a |
Nothing matches that search.
Cluster buys in ATTO
| Last filed | Stock | Insiders | Trades | Total value | Days spanned | 90 day vs S&P |
|---|---|---|---|---|---|---|
| 13 Aug 2026 | ATTO | 6 | 9 | $52M | 7 | n/a |
Related pages
Frequently asked questions
Who has bought ATTO?
0 Congress buys by 0 members and 9 insider buys are on file. The tables on this page list every one.
Did buying ATTO after a disclosure beat the market?
No disclosed buy of this stock has matured 90 days yet. A single stock is a small sample.
Sources: Congressional trades: STOCK Act disclosures, collected from CapitolTrades. Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.
Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.