Global Strategic Fund IV, L.P. venBio, a 10% owner of $ATTO, bought 382,352 shares of the company on 08-06-2026 for an estimated $6,499,984. This trade was reported by Quiver Quantitative using data from a recent SEC filing. This increased their holdings of this class of stock by approximately 10.1%. Following this trade, they now own 4,181,367 shares of this class of $ATTO stock.
$ATTO Insider Trading Activity
$ATTO insiders have traded $ATTO stock on the open market 5 times in the past 6 months. Of those trades, 5 have been purchases and 0 have been sales.
Here’s a breakdown of recent trading of $ATTO stock by insiders over the last 6 months:
- GROUP, LLC REDMILE has made 2 purchases buying 600,000 shares for an estimated $10,200,000 and 0 sales.
- LIFE SCIENCES XI, L.P. FRAZIER purchased 588,235 shares for an estimated $9,999,995
- GLOBAL STRATEGIC FUND IV, L.P. VENBIO purchased 382,352 shares for an estimated $6,499,984
- SANOFI purchased 300,000 shares for an estimated $5,100,000
To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.
This article is not financial advice. See Quiver Quantitative's disclaimers for more information.
