DOSSIER · 13F-HR · Q3 2026

NORTHSTAR ASSET MANAGEMENT Co

$553M in tracked AUM across 250 positions as of Q3 2026.

NA
CIK 0001132708 · last filed Sep 30, 2026
Total AUM
$553M
as of Q3 2026
Holdings
250
—
positions
Whale Score
60
60
tracked
Activity
—
no data
changes this Q
AI Analysis · Q3 2026

One line item explains NorthStar Asset Management Co's Q1 2026 book better than the whole change table: Vanguard Information Technology ETF is 17.1% of a $445 million portfolio — larger than Apple (8.9%) and the total-market ETF VTI (5.5%) put together. Stacking a dedicated tech sector ETF on top of a multi-percent single-stock Apple line is the strategy in miniature: growth bias expressed twice. Share activity was quiet around that core — VGT shares barely trimmed (−0.7%) while its value fell on marks; Apple saw a ~1.7% share cut. Clean exits include Qualcomm (~$3.3 million prior), Adobe (~$2.6 million), and Broadcom (~$1.8 million). New names of size are Honeywell, L3Harris, and Mondelez (each ~$1.8–1.9 million). Treat the paired RTX sold/new rows as a CUSIP remap.

One line item explains NorthStar Asset Management Co's Q1 2026 book better than the whole change table: Vanguard Information Technology ETF (VGT) is 17.1% ($76.2 million) of a $445 million portfolio. Apple is a separate 8.9% ($39.4 million). A reader who only scanned "top holdings" might see diversification across Vanguard products; the economic risk is stacked tech — sector ETF plus the largest tech common still held outright.

Vanguard Total Stock Market (VTI, 5.5%), Vanguard Growth (VUG, 4.6%), Vanguard Mid-Cap (VO, 3.7%), and Vanguard Small-Cap (VB, 2.6%) extend the same toolkit. ETFs as a sector sleeve are about $216 million — nearly half the filing.

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
VGT
VANGUARD WORLD FD
$105M855K18.9%
02
AAPL
APPLE INC
$52M151K9.4%
03
VTI
VANGUARD INDEX FDS
$29M76K5.2%
04
VUG
VANGUARD INDEX FDS
$26M288K4.7%
05
VO
VANGUARD INDEX FDS
$19M230K3.4%
06
BRK/B
BERKSHIRE HATHAWAY INC DEL
$17M32K3.1%
07
MSFT
MICROSOFT CORP
$15M28K2.7%
08
SPY
STATE STR SPDR S&P 500 ETF T
$13M17K2.4%
09
VOO
VANGUARD INDEX FDS
$13M18K2.4%
10
VB
VANGUARD INDEX FDS
$13M43K2.3%

Filing history

2026Q3Sep 30
$553M▲ 4.2%
250 positionsView →
2026Q2Jun 30
$531M▲ 19.3%
262 positionsView →
2026Q1Mar 31
$445M▼ 5.6%
187 positionsView →
2025Q4Dec 31
$471M▲ 1.1%
189 positionsView →
2025Q3Sep 30
$466M▲ 7.2%
193 positionsLocked
2025Q2Jun 30
$435M▲ 5.0%
197 positionsLocked
2025Q1Mar 31
$414M▼ 5.1%
198 positionsLocked
2024Q4Dec 31
$436M▼ 0.0%
200 positionsLocked
2024Q3Sep 30
$436M▲ 5.6%
198 positionsLocked
2024Q2Jun 30
$413M▲ 1.9%
199 positionsLocked
2024Q1Mar 31
$406M▲ 6.9%
201 positionsLocked
2023Q4Dec 31
$379M▲ 9.3%
204 positionsLocked
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