ATTOAttovia Therapeutics, Inc.
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-08-28.
Insider buys (90d)
$257.33M
Insider sells (90d)
$40.53M
Net flow
$216.80M
Filings
9
Buy transactions
47
Sell transactions
414
Distinct insiders
20
Last close (cached)
$17.78
as of 2026-09-25
1d return
-2.1%
5d return
-19.7%
1m return
-9.1%
Top insiders trading ATTO (90d)
Recent transactions (50)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-28 | 2026-08-06 | WALSH COLIN Director | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | WALSH COLIN Director | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | WALSH COLIN Director | C | 1,957,134 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 76,418 | $21.04 | $1.61M | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 6,763 | $21.61 | $146.1K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 100 | $21.99 | $2.2K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 1,163 | $22.19 | $25.8K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 700 | $22.07 | $15.4K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 200 | $22.05 | $4.4K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 443 | $21.78 | $9.6K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 300 | $20.84 | $6.3K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 1,040 | $22.05 | $22.9K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 1,180 | $21.84 | $25.8K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 400 | $22.02 | $8.8K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 6,970 | $22.03 | $153.5K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 672 | $22.02 | $14.8K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 753 | $21.97 | $16.5K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 100 | $22.11 | $2.2K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 480 | $21.55 | $10.3K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 200 | $22.10 | $4.4K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 3,402 | $22.02 | $74.9K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 1,556 | $22.06 | $34.3K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 200 | $22.05 | $4.4K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 1,332 | $22.03 | $29.3K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 447 | $21.87 | $9.8K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Sale | 988 | $22.03 | $21.8K | open → |
| 2026-08-28 | 2026-08-05 | WALSH COLIN Director | Buy | 85,000 | $21.00 | $1.78M | open → |
| 2026-08-28 | 2026-08-06 | WSLS EMP ONSHORE INVESTMENTS, L.P. Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | WSLS EMP OFFSHORE INVESTMENTS, L.P. Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | WSLS OFFSHORE INVESTMENTS, SLP Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | West Street Life Sciences I, L.P. Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS GROUP INC Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS & CO. LLC Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS ASSET MANAGEMENT, L.P. Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | Broad Street Principal Investments, L.L.C. Other | Buy | 500,000 | $17.00 | $8.50M | open → |
| 2026-08-28 | 2026-08-06 | Broad Street Principal Investments, L.L.C. Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS ASSET MANAGEMENT, L.P. Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS & CO. LLC Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS GROUP INC Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | West Street Life Sciences I, L.P. Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | WSLS OFFSHORE INVESTMENTS, SLP Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | WSLS EMP OFFSHORE INVESTMENTS, L.P. Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | WSLS EMP ONSHORE INVESTMENTS, L.P. Other | C | 478,498 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | WSLS EMP ONSHORE INVESTMENTS, L.P. Other | C | 1,957,134 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | WSLS EMP OFFSHORE INVESTMENTS, L.P. Other | C | 1,957,134 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | WSLS OFFSHORE INVESTMENTS, SLP Other | C | 1,957,134 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | West Street Life Sciences I, L.P. Other | C | 1,957,134 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS GROUP INC Other | C | 1,957,134 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS & CO. LLC Other | C | 1,957,134 | $0.00 | $0.00 | open → |
| 2026-08-28 | 2026-08-06 | GOLDMAN SACHS ASSET MANAGEMENT, L.P. Other | C | 1,957,134 | $0.00 | $0.00 | open → |
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