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# ARK Reports 4.91% Tempus AI Position — Says It Is Not Seeking Control
- URL: https://www.bullished.co/ark-reports-4-91-tempus-ai-position-says-it-is-not-seeking-control-51ee6401/
- Published: 2026-11-06T19:56:02.000Z
- Updated: 2026-11-06T19:56:02.000Z
- Description: Catherine D. Wood is a co-reporting person for the same 8,607,836-share position.
- Author: Matteo Parrino
- Tags: SEC Filings, TEM, Industry: Technology, Topic: Ownership & Activism

ARK Investment Management reported a [4.91% position](https://www.sec.gov/Archives/edgar/data/0001697748/000110465926123788/xslSCHEDULE%5F13G%5FX01/primary%5Fdoc.xml?ref=bullished.co) in [Tempus AI](https://www.bullished.co/tag/tem/), which combines diagnostic testing with patient clinical data, in a passive ownership disclosure filed Friday. ARK said the investment belongs to its ordinary business activities and is not intended to change or influence the company's control.

## One position, two reporting persons

The position comprises 8,607,836 common shares on the disclosure's beneficial-ownership basis. The ownership event is dated October 31, 2026; Friday is the filing date.

Catherine D. Wood is a co-reporting person for that same position, rather than a separate holding to add to ARK's total. Wood, identified as chief executive officer and chief investment officer, agreed with ARK to [file jointly](https://www.sec.gov/Archives/edgar/data/1697748/000110465926123788/tm2629184d1%5Fex-1.htm?ref=bullished.co).

Voting authority differs between the reporting persons. ARK has sole voting authority over [8,161,270 shares](https://www.sec.gov/Archives/edgar/data/0001697748/000110465926123788/xslSCHEDULE%5F13G%5FX01/primary%5Fdoc.xml?ref=bullished.co) and shared authority over 124,106\. Wood has shared voting authority over 8,285,376 shares and no sole voting authority.

ARK also reports sole authority to dispose of 8,607,836 shares, while Wood reports shared disposal authority over the same number.

## Cancer testing and clinical data

Tempus sells genomic sequencing and pathology tests to healthcare providers, life sciences companies and researchers. Its data and applications business licenses de-identified information and supplies analytics, clinical-trial support and algorithm-based diagnostics to pharmaceutical and biotechnology companies through Insights, Trials, Next and Algos.

The company's operations include five testing laboratories and about 700 direct data connections across roughly 5,000 hospitals. Its provider network covers more than 55% of U.S. oncologists, and its database contained more than 8.6 million de-identified patient records as of December 31, 2025.

Tempus AI shares rose about 7% to $75.69 in Friday trading. The company's market capitalization stood at $12.8 billion in Friday trading.

ARK's stated purpose is ordinary-course investing, not an effort to influence control of Tempus AI.

Learn

- [13D Filing Requirements And Deadline, Shown With Real Filings →](https://www.bullished.co/learn/13d-filing-requirements/)  
A Schedule 13D is required when you own more than 5% of a public company's voting shares. See the deadline, contents and real filings from this week.
- [13D Vs 13G: What Each 5% Stake Filing Means And How To Read One →](https://www.bullished.co/learn/13d-vs-13g/)  
13D vs 13G: both report stakes above 5%, but 13G is the short passive form and 13D explains intent. See real BlackRock and Pictet filings read in plain English.

### Sources

- [SCHEDULE 13G/A — ARK Investment Management LLC re: Tempus AI, Inc. (TEM)](https://www.sec.gov/Archives/edgar/data/0001697748/000110465926123788/xslSCHEDULE%5F13G%5FX01/primary%5Fdoc.xml?ref=bullished.co) — SEC EDGAR
- [SCHEDULE 13G/A Exhibit 1 — EXHIBIT 1](https://www.sec.gov/Archives/edgar/data/1697748/000110465926123788/tm2629184d1%5Fex-1.htm?ref=bullished.co) — SEC EDGAR
- [Cathie Wood Loads Up On TEM, ILMN And Biotech Stocks — But Pares Stake In This Pharma Giant That Had A Blowout Q3](https://finance.yahoo.com/healthcare/articles/cathie-wood-loads-tem-ilmn-050541922.html?ref=bullished.co) — Yahoo Finance

### More on Tempus AI

- [Tempus Stock Soars 9%, Adding $1.2 Billion, After Raising Revenue Forecast And Narrowing Loss](https://www.bullished.co/tempus-stock-soars-9-adding-1-2-billion-after-raising-revenue-forecast-and-narrowing-loss-4fc903ad/)
- [Tempus AI's Loss Shrinks To $14.9 Million, Helped By $44.0 Million Jump In Paper Gains On Stock It Holds](https://www.bullished.co/tempus-ais-loss-shrinks-to-14-9-million-helped-by-44-0-million-jump-in-paper-gains-on-6af5a85d/)
- [Tempus Lifts 2026 Revenue Forecast To $1.60 Billion As Third-Quarter Loss Shrinks To $14.9 Million](https://www.bullished.co/tempus-lifts-2026-revenue-forecast-to-1-60-billion-as-third-quarter-loss-shrinks-to-14-9-431bf7ce/)

[All Tempus AI (TEM) coverage →](https://www.bullished.co/tag/tem/)