ARK Investment Management LLC and Catherine D. Wood filed Amendment No. 8 to a beneficial ownership statement with the SEC on November 13, 2026, disclosing a combined holding of 7,119,390 shares of Personalis, Inc. common stock as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: ARK Investment Management LLC and Catherine D. Wood jointly report 7,119,390 shares of Personalis, Inc. common stock.
  • Percent of class: The 7,119,390 shares represent 6.67% of Personalis common stock outstanding.
  • Voting and dispositive power: ARK holds sole voting and sole dispositive power over all 7,119,390 shares; Catherine D. Wood holds shared voting and shared dispositive power over the same shares.
  • Five-percent client disclosure: According to the filing, ARK Genomic Revolution ETF, a series of a Delaware statutory trust, is the one ARK client with an interest exceeding 5% in the reported securities.
  • Event date: The filing event triggering this amendment is dated September 30, 2026.
  • Signatories: The statement was signed by Kathleen Fontano, Chief Compliance Officer of ARK, and by Catherine D. Wood in her capacity as Chief Executive Officer and Chief Investment Officer, both on November 13, 2026.

ARK Investment Management's Disclosed Position in Personalis Common Stock

According to the filing, ARK Investment Management LLC, a Delaware-organized investment adviser, and Catherine D. Wood, a United States citizen who serves as ARK's Chief Executive Officer and Chief Investment Officer, together report beneficial ownership of 7,119,390 shares of common stock of Personalis, Inc. (NASDAQ:PSNL), a genomic sequencing and analytics company headquartered at 6600 Dumbarton Circle, Fremont, CA 94555. The event that required the filing of this amendment occurred on September 30, 2026, and the statement was submitted as Amendment No. 8 to the filers' prior disclosures.

The filing draws a clear division of authority over the reported shares. ARK holds sole voting power and sole dispositive power over all 7,119,390 shares, while Catherine D. Wood holds shared voting power and shared dispositive power over the same 7,119,390 shares, with no sole voting or sole dispositive power attributed to her individually. The filing states 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."

On the question of whether any single client of ARK holds an interest exceeding 5% of the reported securities, the filing identifies ARK Genomic Revolution ETF, described as "a series of a Delaware statutory trust," as the only such client. No other person is identified as having the right to receive dividends from, or proceeds from the sale of, the reported shares in excess of 5% of the class. The filing is classified under Rule 13d-1(b), and ARK is identified as an investment adviser.

What Was Disclosed

ARK Investment Management LLC and Catherine D. Wood disclosed beneficial ownership of 7,119,390 shares of Personalis, Inc. common stock, equal to 6.67% of the class, as of September 30, 2026, with ARK Genomic Revolution ETF identified as the sole client holding more than 5% of those securities.