$ATTO SEC Filings

Filed On	Filing
08 Oct 2026	Form 4/A: Chan Steven, Chief Financial Officer Granted 140,000 Stock Option (Right to Buy)
08 Oct 2026	Form 3/A: Chan Steven, Chief Financial Officer
08 Oct 2026	Form 4/A: Fu Tao, Director Granted 538,300 Stock Option (Right to Buy)
08 Oct 2026	Form 3/A: Fu Tao, Director Holds 87,843 shares of Common Stock
02 Sep 2026	10-Q
02 Sep 2026	8-K: Results of Operations and Financial Condition
28 Aug 2026	Form 4/A: Walsh Colin, Director Bought 85,000 shares ($1.79M) · Sold 105,807 shares ($2.25M) · Acquired 105,807 Equity Swap (Open Market Purchase) ($2.25M) · 2 more
28 Aug 2026	144
28 Aug 2026	Form 4/A: Goldman Sachs Group Inc, Former 10% Owner and 7 others Bought 85,000 shares ($1.79M) · Sold 105,807 shares ($2.25M) · Acquired 105,807 Equity Swap (Open Market Purchase) ($2.25M) · 2 more
13 Aug 2026	Form 4: Walsh Colin, Director Bought 85,000 shares ($1.79M) · Sold 105,807 shares ($2.25M) · Received 2,435,632 shares by conversion · 1 more
13 Aug 2026	Form 4: Goldman Sachs Group Inc, Former 10% Owner and 7 others Bought 85,000 shares ($1.79M) · Sold 105,807 shares ($2.25M) · Received 2,435,632 shares by conversion · 1 more
12 Aug 2026	SCHEDULE 13G
11 Aug 2026	SCHEDULE 13D
10 Aug 2026	Form 4: Deep Track Biotechnology Master Fund, Ltd., 10% owner and 2 others Received 1,957,138 shares by conversion
10 Aug 2026	Form 4: venBio Global Strategic Fund IV, L.p., 10% owner Received 3,799,015 shares by conversion · Bought 382,352 shares ($6.5M)
07 Aug 2026	Form 4: Redmile Group, Llc, 10% owner and 2 others Received 782,854 shares by conversion · Bought 600,000 shares ($10.2M)
07 Aug 2026	Form 4: Sanofi, 10% owner Received 782,855 shares by conversion · Bought 300,000 shares ($5.1M)
06 Aug 2026	Form 4: Frazier Life Sciences XI, L.p., 10% owner and 2 others Received 5,490,629 shares by conversion · Bought 588,235 shares ($10M)
06 Aug 2026	Form 4: You Angie, Director Granted 27,000 Stock Option (Right to Buy)
06 Aug 2026	Form 4: Gold Mitchell, Director Granted 27,000 Stock Option (Right to Buy)

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