13F Insight
DOSSIER · 13F-HR · Q3 2026

Tarbox Family Office, Inc.

$711M in tracked AUM across 100 positions as of Q3 2026.

TF
CIK 0001599603 · last filed Sep 30, 2026
Total AUM
$711M
as of Q3 2026
Holdings
100
—
positions
Whale Score
64
64
tracked
Activity
—
no data
changes this Q
AI Analysis · Q3 2026
Comprehensive Analysis of Tarbox Family Office, Inc. SEC 13F Filing
Portfolio Overview

The Tarbox Family Office, Inc. has undergone a dramatic transformation in the quarter ending December 31, 2025. The total portfolio value surged by 446.1%, growing from $113.81M to $621.55M. This explosive growth suggests a significant capital inflow or a major restructuring event, rather than mere market appreciation. The portfolio now comprises 105 holdings, indicating a shift toward a...

The structure of the portfolio has pivoted aggressively toward a passive, index-based core. Unlike many family offices that concentrate on high-conviction individual stock picks, Tarbox Family Office now utilizes a "Core-Satellite" approach where the "Core" is dominated by broad-market ETFs. This suggests a strategic objective to capture beta (market returns) efficiently across global markets while maintaining specific tactical tilts through factor-based ETFs and a smaller selection of individual equities.

Key Holdings
Analysis generated by 13F Insight from SEC Form 13F filing data · Q3 2026. Methodology

Quarter at a glance — Q3 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q3 2026.

#HoldingValueSharesWeight
01
IVV
ISHARES TR
$237M309K33.3%02
IJH
ISHARES TR
$53M739K7.5%03
AVEM
AMERICAN CENTY ETF TR
$47M499K6.6%04
JCPB
J P MORGAN EXCHANGE TRADED F
$28M630K4.0%05
IEFA
ISHARES TR
$28M284K3.9%06
AVDE
AMERICAN CENTY ETF TR
$27M294K3.7%07
AVUV
AMERICAN CENTY ETF TR
$26M222K3.7%08
IWM
ISHARES TR
$24M86K3.3%09
AVTM
AMERICAN CENTY ETF TR
$22M396K3.0%10
AVMC
AMERICAN CENTY ETF TR
$19M250K2.7%

Filing history

2026Q3Sep 30
$711M▲ 1.8%
100 positionsView →2026Q2Jun 30
$698M▲ 12.3%
96 positionsView →2025Q4Dec 31
$622M▼ 8.8%
105 positionsView →2025Q3Sep 30
$681M▲ 2.5%
114 positionsLocked2025Q2Jun 30
$665M▲ 10.5%
116 positionsLocked2025Q1Mar 31
$602M▼ 0.8%
107 positionsLocked2024Q4Dec 31
$606M▼ 0.6%
107 positionsLocked2024Q3Sep 30
$610M▲ 7.6%
109 positionsLocked2024Q2Jun 30
$567M▼ 0.4%
104 positionsLocked2024Q1Mar 31
$569M▲ 10.6%
104 positionsLocked2023Q4Dec 31
$514M▲ 6.5%
97 positionsLocked2023Q3Sep 30
$483M▼ 6.1%
99 positionsLocked
Showing 12 of 46