Mason Investment Advisory Services, Inc.

Q4 2025 13F Combination Report, Stock Holdings

Signature - Title
Jack Delaney - Chief Compliance Officer
Location
Reston, VA
Holdings as of
31 Dec 2025
Value $
$2,107,567,887
Num holdings
80
Filing time
12 Feb 2026, 15:00:14 UTC
Form type
13F-HR
Description
A portion of the US holdings for this investor are reported in this report and a portion are reported by other reporting manager(s). Top holdings included VLUE, AVUV, VSS, TGRT, and AVDV.
Previous filing
Q3 2025 - 12 Nov 2025
Sym Weight Trade Impact Company Class Share Change Activity Value Change $ Value $ * Price $ Shares Principal
Filing 2025 Q4 compared to 2025 Q3 by default. Changes are calculated vs the previous SEC filing.
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.

Person Signing this Report on Behalf of Reporting Manager:

Name Title City, State Date
Jack Delaney Chief Compliance Officer Reston, Virginia 12 Feb 2026

List of Other Managers Reporting for Mason Investment Advisory Services, Inc.:

Name Holdings Value Location File Number
Aperio Group, LLC Sausalito, CA 028-11964
BlackRock, Inc. $5,886,476,194,779 New York, NY 028-24466