BlackRock, Inc. filed Amendment No. 7 to Schedule 13G with the SEC on October 27, 2026, disclosing beneficial ownership of 16,186,508 shares of ATI Inc. common stock as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: BlackRock reported beneficial ownership of 16,186,508 shares of ATI Inc. common stock.
  • Percent of class: The reported stake represents 11.9% of ATI Inc.'s outstanding common shares.
  • Sole voting power: BlackRock disclosed sole voting power over 15,485,676 shares.
  • Sole dispositive power: BlackRock reported sole dispositive power over all 16,186,508 shares.
  • Shared voting and dispositive power: Both shared voting power and shared dispositive power are reported as 0.
  • Event date: The date of the event requiring this filing is September 30, 2026.

BlackRock's Amendment No. 7 Filing on ATI Inc. Ownership

BlackRock, Inc., organized in Delaware and headquartered at 50 Hudson Yards, New York, NY 10001, filed Amendment No. 7 to Schedule 13G with respect to the common stock of ATI Inc. (CUSIP 01741R102), whose principal executive offices are listed at 2021 McKinney Avenue, Dallas, TX 75201. The filing was signed by Spencer Fleming, Managing Director, on October 27, 2026, and reflects ownership as of the event date of September 30, 2026.

According to the filing, BlackRock reported aggregate beneficial ownership of 16,186,508 shares, equating to 11.9% of the class. Of those shares, 15,485,676 are subject to sole voting power, while 16,186,508 are subject to sole dispositive power. Shared voting power and shared dispositive power are each reported as 0. The filing identifies BlackRock as a parent holding company (type "HC") and notes that the reported securities are held by certain business units of BlackRock and its subsidiaries and affiliates, as described under SEC Release No. 34-39538.

The filing states that "various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of ATI INC," but specifies that no single person's interest exceeds five percent of the total outstanding common shares. BlackRock certified that the securities "were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer." Subsidiary identification is referenced in Exhibit 99 attached to the filing.

What Was Disclosed

BlackRock, Inc. disclosed in Amendment No. 7 to Schedule 13G that it beneficially owns 16,186,508 shares of ATI Inc. common stock, representing 11.9% of the class, with the event date of September 30, 2026, and the filing dated October 27, 2026.