Attovia (ATTO) 10% Owner Goldman Sachs Buys 585,000 Shares

What Happened
Goldman Sachs Group Inc., reported as a >10% owner, completed a mix of purchases, sales and derivative conversions in Attovia Therapeutics (ATTO) around Aug 5–6, 2026. The largest cash purchase was 500,000 shares at $17.00 on Aug 6 for $8.5M; it also bought 85,000 shares at $21.00 on Aug 5 ($1.785M) and additional smaller purchases tied to equity-swap/derivative activity totaling 105,807 shares (~$2.25M). Goldman sold about 105,807 shares on Aug 5 for roughly $2.25M. Net of the cash trades reported, Goldman increased its position by about 585,000 shares and spent roughly $10.3M in cash purchases. The filing also reports large conversions of derivative/preferred interests into common stock (reported at $0), reflecting structure/conversion activity related to the IPO and related instruments.

Key Details

• Transaction dates: Aug 5–6, 2026. Amended Form 4 filed Aug 28, 2026 to correct/expand earlier reporting.
• Notable purchases: 500,000 shares @ $17.00 on Aug 6 ($8,500,000); 85,000 shares @ $21.00 on Aug 5 ($1,785,000); multiple smaller buy entries tied to derivative/equity-swap positions totaling 105,807 shares (~$2.25M).
• Notable sales: ~105,807 shares sold across many trades on Aug 5 for ~ $2.25M (individual sale prices ranged ~ $20.84–$22.19).
• Derivative/conversion items: reported conversions on Aug 6 include acquisitions of 1,957,134 and 478,498 shares (reported $0) and dispositions of 18,181,830 and 4,445,275 shares (reported $0). Footnote 5 notes preferred stock converted into common upon IPO (1-for-1, adjusted for a 1-for-9.29 reverse split).
• Shares owned after the transactions: not consolidated into a single post-transaction total in this filing; the filing lists holdings across several Goldman-managed entities (see footnotes).
• Filing status / corrections: this is an amended Form 4. Footnote 3 says equity swap positions were inadvertently omitted from the original Form 4; footnote 4 corrects prior Form 3 conversion counts. Footnote 2 notes certain trades were executed by Goldman Sachs & Co. LLC acting as a market maker and that any net profits potentially recoverable under Section 16(b) will be remitted to the issuer.

Context

• Institutional owner: Goldman Sachs here is a 10%+ institutional owner and includes multiple affiliated funds/vehicles; these filings reflect both principal trading, market-making activity and conversions/derivative adjustments — not an individual executive buying or selling.
• Derivatives explained simply: several entries are "conversion of derivative security" or equity-swap related purchases/sales; those are reported at $0 because they reflect conversion/settlement mechanics rather than cash open-market purchases.
• Amended filing: because the Form 4 was amended to add omitted swap positions and correct conversion counts, retail investors should review the footnotes and the original filings for a full picture of timing and disclosure.

Bottom line: This filing shows significant net purchases by Goldman Sachs (institutional owner), driven largely by a $8.5M, 500,000-share buy on Aug 6 plus other purchases, offset by about $2.25M of sales on Aug 5 and a set of large derivative/preferred-to-common conversions reported in the filing.