NORTHSTAR ASSET MANAGEMENT INC — 13F Holdings & Portfolio
CIK 869304 · latest 13F-HR filed 2026-07-28
NORTHSTAR ASSET MANAGEMENT INC manages $341.2M in 13F-reported U.S. long-equity assets across 91 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are DSI (11.68%), GOOGL (7.22%), VSGX (5.89%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 10 new positions, exited 5, added to 38, and trimmed 31.
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.
BOSTON, MA 02130
$341.2M
Long-equity book
91
Distinct positions
2026-06-30
Filed 2026-07-28
+10 / −5 / ↑38 / ↓31
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- ISHARES TR$14.1M +54.9%
- VANGUARD WORLD FD$6.9M +52.1%
- ADVANCED MICRO DEVICES INC$4.9M +179.4%
- DATADOG INC$4.1M +120.6%
- ALPHABET INC$3.1M +14.2%
Top Trims
- EASTERN BANKSHARES INC-$4.3M -84.9%
- INTUIT-$2.6M -46.5%
- AUTOMATIC DATA PROCESSING IN-$2.6M -24.6%
- COSTCO WHOLESALE CORPORATION-$2.3M -14.9%
- TJX COS INC NEW-$2.2M -15.2%
New Positions
- AFFIRM HLDGS INC$815.5K
- SEAGATE TECHNOLOGY HLDNGS PL$619.5K
- APPLIED MATLS INC$601.5K
- LAM RESEARCH CORP$266.1K
- BLACKROCK INC$248.1K
Exited Positions
- VERISK ANALYTICS INC$3.6M
- ALCON AG$2.1M
- FEDEX CORP$863.4K
- EXXON MOBIL CORP$254.7K
- GILEAD SCIENCES INC$233.3K
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 | ISHARES TR | DSI | 464288570 | $39.9M | 11.68% | 279,901 | SH |
| 2 | ALPHABET INC | GOOGL | 02079K305 | $24.6M | 7.22% | 68,922 | SH |
| 3 | VANGUARD WORLD FD | VSGX | 921910725 | $20.1M | 5.89% | 244,109 | SH |
| 4 | APPLE INC | AAPL | 037833100 | $18.8M | 5.50% | 64,819 | SH |
| 5 | MICROSOFT CORP | MSFT | 594918104 | $15.6M | 4.58% | 41,891 | SH |
| 6 | COSTCO WHOLESALE CORPORATION | COST | 22160K105 | $13.1M | 3.84% | 14,023 | SH |
| 7 | TJX COS INC NEW | TJX | 872540109 | $12.3M | 3.61% | 81,385 | SH |
| 8 | LINDE PLC | LIN | G54950103 | $12.1M | 3.55% | 23,325 | SH |
| 9 | STRYKER CORPORATION | SYK | 863667101 | $10.6M | 3.10% | 33,581 | SH |
| 10 | BERKSHIRE HATHAWAY INC DEL | BRK.A | 084670108 | $10.5M | 3.07% | 14 | SH |
| 11 | EATON CORP PLC | ETN | G29183103 | $9.3M | 2.73% | 21,823 | SH |
| 12 | HOME DEPOT INC | HD | 437076102 | $8.6M | 2.53% | 24,461 | SH |
| 13 | CANADIAN NATL RY CO | CNI | 136375102 | $8.5M | 2.50% | 71,406 | SH |
| 14 | AUTOMATIC DATA PROCESSING IN | ADP | 053015103 | $7.8M | 2.30% | 35,000 | SH |
| 15 | ADVANCED MICRO DEVICES INC | AMD | 007903107 | $7.7M | 2.24% | 13,172 | SH |
| 16 | DATADOG INC | DDOG | 23804L103 | $7.4M | 2.18% | 28,529 | SH |
| 17 | TAIWAN SEMICONDUCTOR MANUFAC | TSM | 874039100 | $7.3M | 2.15% | 15,379 | SH |
| 18 | XYLEM INC | XYL | 98419M100 | $7.0M | 2.06% | 59,526 | SH |
| 19 | VANGUARD INDEX FDS | VOO | 922908363 | $7.0M | 2.06% | 10,220 | SH |
| 20 | IDEXX LABS INC | IDXX | 45168D104 | $6.3M | 1.84% | 11,901 | SH |
| 21 | ISHARES INC | ESGE | 46434G863 | $5.5M | 1.61% | 100,200 | SH |
| 22 | NVIDIA CORPORATION | NVDA | 67066G104 | $5.0M | 1.47% | 25,027 | SH |
| 23 | VERALTO CORP | VLTO | 92338C103 | $4.7M | 1.37% | 52,674 | SH |
| 24 | UNILEVER PLC | UL | 904767803 | $4.2M | 1.23% | 69,659 | SH |
| 25 | PALO ALTO NETWORKS INC | PANW | 697435105 | $3.9M | 1.13% | 11,299 | SH |
| 26 | BADGER METER INC | BMI | 056525108 | $3.6M | 1.06% | 24,331 | SH |
| 27 | DIGITAL RLTY TR INC | DLR | 253868103 | $3.6M | 1.04% | 19,811 | SH |
| 28 | NASDAQ INC | NDAQ | 631103108 | $3.4M | 0.99% | 43,041 | SH |
| 29 | MERCADOLIBRE INC | MELI | 58733R102 | $3.3M | 0.96% | 1,922 | SH |
| 30 | INTUIT | INTU | 461202103 | $3.0M | 0.88% | 11,443 | SH |
| 31 | KLA CORP | KLAC | 482480100 | $2.8M | 0.83% | 9,335 | SH |
| 32 | BROADCOM INC | AVGO | 11135F101 | $2.7M | 0.79% | 7,130 | SH |
| 33 | ICICI BANK LIMITED | IBN | 45104G104 | $2.5M | 0.74% | 86,720 | SH |
| 34 | NOVO-NORDISK A S | NVO | 670100205 | $2.5M | 0.73% | 51,796 | SH |
| 35 | ARISTA NETWORKS INC | ANET | 040413205 | $2.4M | 0.71% | 14,362 | SH |
| 36 | CALIFORNIA WTR SVC GROUP | CWT | 130788102 | $2.3M | 0.69% | 48,193 | SH |
| 37 | BERKSHIRE HATHAWAY INC DEL | BRK.B | 084670702 | $2.2M | 0.64% | 4,356 | SH |
| 38 | WINMARK CORP | WINA | 974250102 | $1.7M | 0.51% | 4,114 | SH |
| 39 | MIDDLESEX WTR CO | MSEX | 596680108 | $1.6M | 0.46% | 27,967 | SH |
| 40 | SALESFORCE INC | CRM | 79466L302 | $1.6M | 0.46% | 9,955 | SH |
| 41 | ALPHABET INC | GOOG | 02079K107 | $1.5M | 0.43% | 4,127 | SH |
| 42 | SPROUTS FMRS MKT INC | SFM | 85208M102 | $1.4M | 0.41% | 16,436 | SH |
| 43 | BROADRIDGE FINL SOLUTIONS IN | BR | 11133T103 | $1.4M | 0.40% | 9,926 | SH |
| 44 | ZOOM COMMUNICATIONS INC | ZM | 98980L101 | $1.1M | 0.31% | 12,444 | SH |
| 45 | DANAHER CORP DEL | DHR | 235851102 | $952.2K | 0.28% | 4,999 | SH |
| 46 | WW GRAINGER INC | GWW | 384802104 | $933.2K | 0.27% | 686 | SH |
| 47 | CISCO SYS INC | CSCO | 17275R102 | $858.8K | 0.25% | 7,311 | SH |
| 48 | AFFIRM HLDGS INC | AFRM | 00827B106 | $815.5K | 0.24% | 10,000 | SH |
| 49 | EASTERN BANKSHARES INC | EBC | 27627N105 | $765.7K | 0.22% | 34,430 | SH |
| 50 | MAGNUM ICE CREAM CO NV | MICC | N5505D105 | $671.9K | 0.20% | 38,605 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-07-28 | $341.2M | 91 | 0001172661-26-002890 |
| 2026-03-31 | 2026-05-13 | $325.9M | 86 | 0001172661-26-001763 |
| 2025-12-31 | 2026-02-12 | $387.2M | 88 | 0001172661-26-000677 |
| 2025-09-30 | 2025-10-30 | $384.6M | 70 | 0001172661-25-004516 |