Colin Walsh - 05 Aug 2026 Form 4 Insider Report for Attovia Therapeutics, Inc. (ATTO)

Reporting relationship: Director
Issuer ticker: ATTO
Reported as of: 05 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Aug 2026, 21:52:51 UTC
Prior SEC filing: 05 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Crystal Orgill, Attorney-in-fact

Key filing fact

Colin Walsh filed Form 4 for Attovia Therapeutics, Inc. (ATTO) on 13 Aug 2026.

Key facts

This page summarizes Colin Walsh's Form 4 filing for Attovia Therapeutics, Inc. (ATTO).
29 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 13 Aug 2026, 21:52.

Change

Previous filing in this sequence was filed on 05 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001866174 Primary reporting owner

WALSH COLIN

Relationship: Director
Address: C/O GOLDMAN SACHS GROUP INC., 2OO WEST STREET, NEW YORK
Signature: /s/ Crystal Orgill, Attorney-in-fact
Signature date: 13 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ATTO transaction

Common Stock

Purchase

Transaction value
Shares: +85,000
Change %
Price: $21.00^*
Shares after: 85,000
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -988
Change %: -1.2%
Price: $22.03^*
Shares after: 84,012
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -447
Change %: -0.53%
Price: $21.87^*
Shares after: 83,565
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -1,332
Change %: -1.6%
Price: $22.03^*
Shares after: 82,233
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -200
Change %: -0.24%
Price: $22.05^*
Shares after: 82,033
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -1,556
Change %: -1.9%
Price: $22.06^*
Shares after: 80,477
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -3,402
Change %: -4.2%
Price: $22.02^*
Shares after: 77,075
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -200
Change %: -0.26%
Price: $22.10^*
Shares after: 76,875
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -480
Change %: -0.62%
Price: $21.55^*
Shares after: 76,395
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -100
Change %: -0.13%
Price: $22.11^*
Shares after: 76,295
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -753
Change %: -0.99%
Price: $21.97^*
Shares after: 75,542
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -672
Change %: -0.89%
Price: $22.02^*
Shares after: 74,870
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -6,970
Change %: -9.3%
Price: $22.03^*
Shares after: 67,900
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -400
Change %: -0.59%
Price: $22.02^*
Shares after: 67,500
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -1,180
Change %: -1.7%
Price: $21.84^*
Shares after: 66,320
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -1,040
Change %: -1.6%
Price: $22.05^*
Shares after: 65,280
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -300
Change %: -0.46%
Price: $20.84^*
Shares after: 64,980
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -443
Change %: -0.68%
Price: $21.78^*
Shares after: 64,537
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -200
Change %: -0.31%
Price: $22.05^*
Shares after: 64,337
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -700
Change %: -1.1%
Price: $22.07^*
Shares after: 63,637
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -1,163
Change %: -1.8%
Price: $22.19^*
Shares after: 62,474
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -100
Change %: -0.16%
Price: $21.99^*
Shares after: 62,374
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -6,763
Change %: -11%
Price: $21.61^*
Shares after: 55,611
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Sale

Transaction value
Shares: -76,418
Change %: -100%
Price: $21.04^*
Shares after: 0
Date: 05 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

ATTO transaction

Common Stock

Conversion of derivative security

Transaction value
Shares: +1,957,134
Change %: +2303%
Price: $0.000000^*
Shares after: 2,042,134
Date: 06 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F4, F5, F6, F7, F8

ATTO transaction

Common Stock

Conversion of derivative security

Transaction value
Shares: +478,498
Change %: +23%
Price: $0.000000^*
Shares after: 2,520,632
Date: 06 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F4, F5, F6, F7, F8

ATTO transaction

Common Stock

Purchase

Transaction value
Shares: +500,000
Change %: +20%
Price: $17.00^*
Shares after: 3,020,632
Date: 06 Aug 2026
Ownership: See Footnotes
Footnotes: F1, F2, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ATTO transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares: -18,181,830
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 06 Aug 2026
Ownership: See Footnote
Underlying class: Common Stock
Underlying amount: 1,957,134
Exercise price
Footnotes: F1, F4, F5, F6, F7, F8

ATTO transaction Derivative

Series C Preferred Stock

Conversion of derivative security

Transaction value
Shares: -4,445,275
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 06 Aug 2026
Ownership: See Footnote
Underlying class: Common Stock
Underlying amount: 478,498
Exercise price
Footnotes: F1, F4, F5, F6, F7, F8

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 8 footnotes

Footnote F1

The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of the Reporting Person's pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

Footnote F2

These transactions in the common stock of the Issuer were effected by Goldman Sachs & Co. LLC ("GS&Co") acting as a market maker in the ordinary course of business. Without conceding market making trades in the ordinary course of business can result in liability under Section 16(b) of the Exchange Act, the amount of profit potentially recoverable by the Issuer from the reported transactions in the event that they were subject to Section 16(b) will be remitted to the Issuer.

Footnote F3

GS&Co's transactions in the Issuer's common stock on August 5, 2026 consisted of purchases of a total of 85,000 shares and sales of a total of 105,807 shares.

Footnote F4

The previous report on Form 3 reflected an administrative error with respect to the number of shares of common stock issuable upon conversion of the Preferred Stock, which is corrected in this Form 4.

Footnote F5

Each share of Series B Preferred Stock and Series C Preferred Stock (the "Preferred Stock") automatically converted into shares of the Issuer's common stock on a 9.29-for-1 basis upon the closing of the Issuer's initial public offering (the "IPO") on August 6, 2026 without payment of consideration. The Preferred Stock has no expiration date.

Footnote F6

The Reporting Person is a managing director of GS&Co, a subsidiary of The Goldman Sachs Group Inc. ("GS Group"). GS Group is the direct owner of GS&Co and an indirect owner of Goldman Sachs Asset Management, L.P. ("GSAM LP"). GS&Co is the manager of Broad Street Principal Investments L.L.C. ("BSPI") which directly holds 96,190 shares of common stock purchased in the IPO and 468,565 shares of common stock converted from 3,497,806 shares of Series B Preferred Stock and 855,179 shares of Series C Preferred Stock of the Issuer. GSAM LP is the investment manager of WSLS Offshore Investments, SLP ("WSLS Offshore") which directly holds 131,283 shares of common stock purchased in the IPO and 639,518 shares of common stock converted from 4,773,948 shares of Series B Preferred Stock and 1,167,182 shares of Series C Preferred Stock of the Issuer,... (continued in footnote 7)

Footnote F7

(continued from footnote 6)... West Street Life Sciences I, L.P. ("WSLS I") which directly holds 137,708 shares of common stock purchased in the IPO and 670,812 shares of common stock converted from 5,007,564 shares of Series B Preferred Stock and 1,224,299 shares of Series C Preferred Stock of the Issuer, WSLS Emp Offshore Investments, L.P. ("WSLS Emp Offshore") which directly holds 36,927 shares of common stock purchased in the IPO and 179,879 shares of common stock converted from 1,342,794 shares of Series B Preferred Stock and 328,300 shares of Series C Preferred Stock of the Issuer, and WSLS Emp Onshore Investments, L.P. ("WSLS Emp Onshore") which directly holds 97,892 shares of common stock purchased in the IPO and 476,858 shares of common stock converted from 3,559,718 shares of Series B Preferred Stock and 870,315 shares of Series C Preferred Stock of the Issuer,... (continued in footnote 8)

Footnote F8

(continued from footnote 7)... GS&Co is a direct subsidiary of GS Group and is the manager of BSPI. WSLS Offshore, WSLS I, WSLS Emp Offshore, and WSLS Emp Onshore are investment vehicles managed by GSAM LP, an indirect subsidiary of GS Group.