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NORTHSTAR ASSET MANAGEMENT Co — 13F Holdings & Portfolio

CIK 1132708 · latest 13F-HR filed 2026-07-27

Backtest portfolio

NORTHSTAR ASSET MANAGEMENT Co manages $530.8M in 13F-reported U.S. long-equity assets across 262 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are VGT (18.58%), AAPL (9.65%), VTI (5.31%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 144 new positions and exited 21; 73 existing positions rose in reported value and 24 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$530.8M

Long-equity book

Holdings
262

Distinct positions

Period
2026-06-30

Filed 2026-07-27

Q/Q Activity
+144 / −21 / ↑73 / ↓24

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
VGT18.6% · +698%AAPL9.6% · -1%VTI5.3% · +0%VUG4.5% · +509%VO3.5% · +300%BRK.B3.0% · -1%SPY2.5% · +1%VB2.4% · +1%VOO2.3% · +2%MSFT2.1% · -1%TMO1.8% · -3%AME1.7% · -0%URBN1.6% · newNVDA1.5% · -3%ANET1.3% · -2%VYM1.3% · +2%VIG1.2% · +1%SKYY1.2% · -2%RTX1.0% · -0%VTV1.0% · +3%DHR1.0% · -2%VFH1.0% · +0%JNJ0.9% · -2%CIBR0.9% · -2%WMT0.9% · -0%XOM0.9% · -7%GOOG0.9% · -2%JPM0.9% · 0%VOX0.9% · +0%HD0.8% · -1%SHW0.8% · -0%VV0.7% · +1%AMD0.7% · -18%MDY0.7% · +6%PG0.6% · +76%UFOX0.6% · -1%VWO0.6% · newUNP0.5% · -14%ZTS0.5% · -2%AMZN0.5% · +0%AMT0.5% · -1%CVX0.5% · 0%VHT0.5% · +1%V0.5% · 0%COST0.5% · -1%IHI0.5% · -1%PEP0.4% · 0%VEA0.4% · newNVS0.4% · 0%AVGO0.4% · +4%CINF0.4% · newMDLZ0.3% · -5%SYK0.3% · -1%WCN0.3% · 0%LHX0.3% · 0%QCOM0.3% · -23%GOOGL0.3% · 0%ADBE0.3% · -1%MCD0.2% · -2%FDX0.2% · 0%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

3 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 53.9%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Sep 30, 2026.

Assets Under Management
$1.02B
Discretionary
$1.02B
Employees
17
Accounts
6
Address
311 N 7TH AVE
SUITE 100
MINNEAPOLIS, MN 55401-1237
Phone
(612) 371-5700
Website
Name Title / Status Ownership Type
DUFFY, TIMOTHY, SCOTT ControlCHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER
since Sep 2017
Less than 5%Individual
KOCOUREK, CHRISTOPHER, JOHN ControlMANAGING PARTNER, MEMBER, CLASS C
since Jan 2020
25–50%Individual
MARK, DOUGLAS, EDWIN ControlMANAGING PARTNER; MEMBER, CLASS C
since Jul 2004
25–50%Individual
SCHNEIDER, BRIAN, JAMES ControlMANAGING PARTNER; MEMBER, CLASS C
since Jan 2015
25–50%Individual
Ownership & leadership changes · 10 filings with changes since Feb 13, 2012

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Mar 31, 2023 filing
  • ChangedKOCOUREK, CHRISTOPHER, JOHN · ownership 10–25% → 25–50%
Mar 29, 2021 filing
  • No longer listedBECKER, SCOTT, LEE · ADVISING PARTNER; MEMBER · Less than 5% · listed since Dec 2017
  • No longer listedSCHROEDER, CHARLES, LEE · ADVISING PARTNER; MEMBER · Less than 5% · listed since Dec 2015
Mar 30, 2020 filing
  • AddedKOCOUREK, CHRISTOPHER, JOHN · MANAGING PARTNER, MEMBER, CLASS C · 10–25% · control person
  • ChangedMARK, DOUGLAS, EDWIN · ownership 50–75% → 25–50%
  • ChangedSCHNEIDER, BRIAN, JAMES · ownership 50–75% → 25–50%
Mar 29, 2019 filing
  • ChangedBECKER, SCOTT, LEE · title ADVISING PARTNER; MEMBER, CLASS C → ADVISING PARTNER; MEMBER; ownership 10–25% → Less than 5%
  • ChangedMARK, DOUGLAS, EDWIN · ownership 25–50% → 50–75%
  • ChangedSCHNEIDER, BRIAN, JAMES · ownership 25–50% → 50–75%
Mar 29, 2018 filing
  • ChangedBECKER, SCOTT, LEE · title MANAGING PARTNER; MEMBER, CLASS C → ADVISING PARTNER; MEMBER, CLASS C; ownership 25–50% → 10–25%; no longer a control person
Sep 21, 2017 filing
  • ChangedBECKER, SCOTT, LEE · title MANAGING PARTNER, CLASS C → MANAGING PARTNER; MEMBER, CLASS C
  • ChangedMARK, DOUGLAS, EDWIN · title MANAGING PARTNER, CLASS C → MANAGING PARTNER; MEMBER, CLASS C
  • ChangedSCHNEIDER, BRIAN, JAMES · title MANAGING PARTNER, CLASS C → MANAGING PARTNER; MEMBER, CLASS C
  • ChangedSCHROEDER, CHARLES, LEE · title ADVISING PARTNER → ADVISING PARTNER; MEMBER
Sep 5, 2017 filing
  • No longer listedLARSEN, KENNETH, RICHARD · CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER, PARTNER · Less than 5% · control person · listed since May 2007
  • AddedDUFFY, TIMOTHY, SCOTT · CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER · Less than 5% · control person
Mar 28, 2017 filing
  • ChangedBECKER, SCOTT, LEE · title MANAGING PARTNER, CLASS B → MANAGING PARTNER, CLASS C; ownership 10–25% → 25–50%
  • ChangedMARK, DOUGLAS, EDWIN · title MANAGING PARTNER, CLASS B → MANAGING PARTNER, CLASS C; ownership 10–25% → 25–50%
  • ChangedSCHNEIDER, BRIAN, JAMES · title MANAGING PARTNER, CLASS B → MANAGING PARTNER, CLASS C; ownership 10–25% → 25–50%
  • ChangedSCHROEDER, CHARLES, LEE · title MANAGING PARTNER, CLASS B → ADVISING PARTNER; ownership 10–25% → Less than 5%
Mar 22, 2016 filing
  • ChangedBECKER, SCOTT, LEE · ownership 25–50% → 10–25%
  • ChangedMARK, DOUGLAS, EDWIN · ownership 25–50% → 10–25%
  • ChangedSCHROEDER, CHARLES, LEE · ownership 25–50% → 10–25%; no longer a control person
Mar 26, 2015 filing
  • AddedSCHNEIDER, BRIAN, JAMES · MANAGING PARTNER, CLASS B · 10–25% · control person
  • ChangedLARSEN, KENNETH, RICHARD · title CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER → CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER, PARTNER
Older changes (1 more filing)
Feb 13, 2012 filing (earliest on record)
  • ListedBECKER, SCOTT, LEE · MANAGING PARTNER, CLASS B · 25–50% · control person
  • ListedLARSEN, KENNETH, RICHARD · CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER · Less than 5% · control person
  • ListedMARK, DOUGLAS, EDWIN · MANAGING PARTNER, CLASS B · 25–50% · control person
  • ListedSCHROEDER, CHARLES, LEE · MANAGING PARTNER, CLASS B · 25–50% · control person

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 73 →

Top Trims

Show all 24 →

New Positions

Show all 144 →

Exited Positions

Show all 21 →

NORTHSTAR ASSET MANAGEMENT Co Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 VANGUARD WORLD FD VGT 92204A702 $98.7M 18.58% 870,728 SH
2 APPLE INC AAPL 037833100 $51.2M 9.65% 153,794 SH
3 VANGUARD INDEX FDS VTI 922908769 $28.2M 5.31% 77,290 SH
4 VANGUARD INDEX FDS VUG 922908736 $23.7M 4.46% 283,849 SH
5 VANGUARD INDEX FDS VO 922908629 $18.7M 3.52% 232,111 SH
6 BERKSHIRE HATHAWAY INC DEL BRK.B 084670702 $16.2M 3.04% 32,637 SH
7 STATE STR SPDR S&P 500 ETF T SPY 78462F103 $13.1M 2.47% 17,718 SH
8 VANGUARD INDEX FDS VB 922908751 $13.0M 2.45% 44,011 SH
9 VANGUARD INDEX FDS VOO 922908363 $12.3M 2.32% 18,118 SH
10 MICROSOFT CORP MSFT 594918104 $11.0M 2.07% 28,723 SH
11 THERMO FISHER SCIENTIFIC INC TMO 883556102 $9.5M 1.80% 16,787 SH
12 AMETEK INC AME 031100100 $8.9M 1.67% 36,583 SH
13 URBAN OUTFITTERS INC URBN 917047102 $8.5M 1.61% 122,000 SH
14 NVIDIA CORPORATION NVDA 67066G104 $8.0M 1.51% 38,685 SH
15 ARISTA NETWORKS INC ANET 040413205 $7.0M 1.31% 40,025 SH
16 VANGUARD WHITEHALL FDS VYM 921946406 $6.9M 1.30% 42,395 SH
17 VANGUARD SPECIALIZED FUNDS VIG 921908844 $6.3M 1.18% 26,195 SH
18 FIRST TR EXCHANGE-TRADED FD SKYY 33734X192 $6.2M 1.17% 47,255 SH
19 RTX CORPORATION RTX 75513E101 $5.3M 0.99% 24,703 SH
20 VANGUARD INDEX FDS VTV 922908744 $5.2M 0.98% 23,545 SH
21 DANAHER CORP DEL DHR 235851102 $5.1M 0.97% 26,860 SH
22 VANGUARD WORLD FD VFH 92204A405 $5.1M 0.95% 36,706 SH
23 JOHNSON & JOHNSON JNJ 478160104 $4.9M 0.93% 18,776 SH
24 FIRST TR EXCHANGE-TRADED FD CIBR 33734X846 $4.9M 0.92% 55,377 SH
25 WALMART INC WMT 931142103 $4.9M 0.92% 44,589 SH
26 EXXON MOBIL CORP XOM 30231G102 $4.8M 0.91% 30,743 SH
27 ALPHABET INC GOOG 02079K107 $4.8M 0.90% 15,030 SH
28 JPMORGAN CHASE & CO JPM 46625H100 $4.7M 0.89% 13,325 SH
29 VANGUARD WORLD FD VOX 92204A884 $4.6M 0.87% 25,735 SH
30 HOME DEPOT INC HD 437076102 $4.0M 0.75% 12,000 SH
31 SHERWIN WILLIAMS CO SHW 824348106 $4.0M 0.75% 12,564 SH
32 VANGUARD INDEX FDS VV 922908637 $3.6M 0.68% 10,675 SH
33 ADVANCED MICRO DEVICES INC AMD 007903107 $3.6M 0.68% 6,940 SH
34 STATE STR SPDR S&P MIDCAP 40 MDY 78467Y107 $3.5M 0.65% 5,030 SH
35 PROCTER & GAMBLE CO PG 742718109 $3.3M 0.63% 22,689 SH
36 ETF SER SOLUTIONS UFOX 26922A289 $3.1M 0.59% 38,975 SH
37 VANGUARD INTL EQUITY INDEX F VWO 922042858 $3.0M 0.56% 51,633 SH
38 UNION PAC CORP UNP 907818108 $2.9M 0.55% 9,489 SH
39 ZOETIS INC ZTS 98978V103 $2.9M 0.54% 38,086 SH
40 AMAZON COM INC AMZN 023135106 $2.8M 0.52% 11,921 SH
41 AMERICAN TOWER CORP AMT 03027X100 $2.7M 0.50% 15,936 SH
42 CHEVRON CORPORATION CVX 166764100 $2.6M 0.49% 13,328 SH
43 VANGUARD WORLD FD VHT 92204A504 $2.6M 0.49% 8,465 SH
44 VISA INC V 92826C839 $2.5M 0.48% 7,107 SH
45 COSTCO WHOLESALE CORPORATION COST 22160K105 $2.5M 0.47% 2,688 SH
46 ISHARES TR IHI 464288810 $2.4M 0.45% 47,760 SH
47 PEPSICO INC PEP 713448108 $2.3M 0.43% 16,745 SH
48 VANGUARD TAX-MANAGED FDS VEA 921943858 $2.2M 0.42% 31,630 SH
49 NOVARTIS AG NVS 66987V109 $2.2M 0.41% 13,875 SH
50 BROADCOM INC AVGO 11135F101 $2.1M 0.40% 5,575 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-07-27 $530.8M 262 0001132708-26-000003
2026-03-31 2026-04-23 $445.0M 187 0001132708-26-000002
2025-12-31 2026-01-27 $471.3M 189 0001132708-26-000001
Filer Information
Address
488 NORRISTOWN ROAD
SUITE 142
BLUE BELL, PA 19422
Phone
(484) 342-4200
Filing Manager
NORTHSTAR ASSET MANAGEMENT Co
BLUE BELL, PA
Signatory
Kristen Hannan
VP