Private company
Who owns Vantage Oncology Holdings, LLC
One company in the researched set discloses a stake in Vantage Oncology Holdings, LLC, none of it sized by anyone who discloses it. Vantage Oncology Holdings, LLC is private, so no 13F reports it: a 13F covers exchange listed positions only. These figures exist because each holder disclosed the stake in its own filings.
Vantage Oncology Holdings, LLC - Profile
- Type
- subsidiary
- Based in
- United States
- Founded
- 2002
Vantage Oncology is a cancer care provider based in Manhattan Beach, California that develops, owns and manages radiation oncology and medical oncology centers and supplies practice management, physician recruitment and technology services to the physicians who staff them. Founded in October 2002, it grew to more than 50 treatment facilities across 13 states with over 350 affiliated physicians, many of them freestanding community radiation therapy centers operated in partnership with local physician groups and hospitals. McKesson agreed in February 2016 to buy the business, alongside the specialty pharmacy Biologics, in transactions valued at about 1.2 billion dollars combined, after which the Vantage centers were folded into The US Oncology Network.
Source
Vantage Oncology Holdings, LLC files nothing with the SEC, so none of this comes from a filer record. The description was written for this site in August 2026 from McKesson: McKesson Expands Oncology Expertise With the Acquisitions of Vantage Oncology and Biologics, PR Newswire: Vantage Oncology Enters Definitive Agreement To Be Acquired By McKesson and The US Oncology Network: Vantage Oncology's 50 centers and more than 350 affiliated physicians join The US Oncology Network. The ownership figures below come from the holders' filings instead, and are sourced row by row.
The disclosed stakes
One row per position. Where a holder reports the same company in two share classes, both rows are shown rather than summed, because the class is part of a position's identity.
Where each figure comes from
A private stake has no ownership form behind it, so the source is always the holder's own filing or disclosure. Anything modelled says so, with the arithmetic.
- McKesson Corporation. Same combined-balance limitation as ClarusONE: the $395 million (31 Mar 2026) / $380 million (31 Mar 2025) noncontrolling-interest figure covers ClarusONE, Vantage and SCRI Oncology together and is not split by entity, so Vantage's individual value and percentage are not sourceable. Recorded unsized because the investee and McKesson's controlling, consolidating position are named in the filing. source
What this page is not
It is not a complete register. It lists the holders who happen to be inside the researched set and disclosed the stake themselves. A private company can have many other shareholders, and nothing here rules them out: venture investors, founders and employees usually appear in no public filing at all. Percentages are of Vantage Oncology Holdings, LLC where a holder stated one, and are missing where no holder did.