MIDDLETON & CO INC/MA — 13F Holdings & Portfolio
CIK 919497 · latest 13F-HR filed 2026-05-08
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
$876.9M
Long-equity book
Holdings
164
Distinct positions
Period
2026-03-31
Filed 2026-05-08
Q/Q Activity
+5 / −4 / ↑39 / ↓72
vs 2025-12-31
Firm Profile & Key People
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- Exxon Mobil Corp$5.9M +42.7%
- Costco Wholesale Corp$3.2M +14.9%
- Equinix Inc$2.8M +29.9%
- Ishares Msci Intl Quality Fact$2.1M +30.2%
- Eaton Corp Plc$1.9M +25.3%
Top Trims
- Alphabet Inc Cap Stock Cl A-$9.6M -13.9%
- Microsoft Corp-$6.7M -24.2%
- Amazon.com Inc-$5.8M -10.3%
- Adobe Inc-$5.6M -54.3%
- Intuit-$5.5M -35.4%
New Positions
- Amphenol Corp Cl A$2.3M
- Boston Scientific Corp$1.5M
- Avantis International Small Ca$1.1M
- Valero Energy Corp$249.8K
- Enterprise Products Partners L$211.9K
Exited Positions
- Kkr & Co Inc$334.3K
- Blackstone Inc$231.2K
- Wells Fargo & Co$215.3K
- Arista Networks Inc$209.6K
All Holdings
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 | Alphabet Inc Cap Stock Cl A | GOOGL | 02079K305 | $59.7M | 6.81% | 207,753 | SH |
| 2 | Apple Inc | AAPL | 037833100 | $56.9M | 6.49% | 224,075 | SH |
| 3 | Amazon.com Inc | AMZN | 023135106 | $51.1M | 5.83% | 245,339 | SH |
| 4 | Broadcom Inc Com | AVGO | 11135F101 | $39.8M | 4.54% | 128,645 | SH |
| 5 | iShares Tr S&P 500 Index | IVV | 464287200 | $31.7M | 3.61% | 48,460 | SH |
| 6 | Costco Wholesale Corp | COST | 22160K105 | $24.4M | 2.79% | 24,516 | SH |
| 7 | VISA INC COM CL | V | 92826C839 | $21.4M | 2.44% | 70,685 | SH |
| 8 | Microsoft Corp | MSFT | 594918104 | $21.2M | 2.41% | 57,141 | SH |
| 9 | JPMorgan Chase & Co | JPM | 46625H100 | $21.1M | 2.40% | 71,606 | SH |
| 10 | Exxon Mobil Corp | XOM | 30231G102 | $19.7M | 2.24% | 115,826 | SH |
| 11 | O'Reilly Automotive Inc | ORLY | 67103H107 | $18.5M | 2.11% | 200,503 | SH |
| 12 | Abbvie Inc | ABBV | 00287Y109 | $17.0M | 1.94% | 78,048 | SH |
| 13 | Palo Alto Networks Inc | PANW | 697435105 | $16.2M | 1.85% | 101,264 | SH |
| 14 | Nextera Energy Inc | NEE | 65339F101 | $16.1M | 1.84% | 173,316 | SH |
| 15 | Merck & Co Inc | MRK | 58933Y105 | $14.7M | 1.68% | 122,145 | SH |
| 16 | Ishares 7-10 Year Treasury Bon | IEF | 464287440 | $13.0M | 1.49% | 136,448 | SH |
| 17 | Danaher Corp | DHR | 235851102 | $13.0M | 1.48% | 68,413 | SH |
| 18 | Nvidia Corporation | NVDA | 67066G104 | $12.9M | 1.47% | 73,742 | SH |
| 19 | Equinix Inc | EQIX | 29444U700 | $12.1M | 1.38% | 12,355 | SH |
| 20 | Lilly Eli & Co | LLY | 532457108 | $11.9M | 1.36% | 12,966 | SH |
| 21 | Berkshire Hathaway Inc Cl B | BRK.B | 084670702 | $11.9M | 1.36% | 24,869 | SH |
| 22 | ServiceNow Inc | NOW | 81762P102 | $11.5M | 1.31% | 109,661 | SH |
| 23 | Salesforce Inc | CRM | 79466L302 | $11.2M | 1.28% | 60,216 | SH |
| 24 | Qualcomm Inc | QCOM | 747525103 | $11.0M | 1.26% | 85,648 | SH |
| 25 | S&P Global Inc | SPGI | 78409V104 | $11.0M | 1.25% | 25,776 | SH |
| 26 | Vanguard Short-Term Treasury E | VGSH | 92206C102 | $10.8M | 1.23% | 184,229 | SH |
| 27 | Steris Plc Shs Usd | STE | G8473T100 | $10.6M | 1.21% | 48,153 | SH |
| 28 | Vanguard Intermediate-Term Gov | VGIT | 92206C706 | $10.2M | 1.16% | 171,520 | SH |
| 29 | Intuit | INTU | 461202103 | $10.0M | 1.14% | 23,114 | SH |
| 30 | Xylem Inc | XYL | 98419M100 | $9.8M | 1.12% | 82,293 | SH |
| 31 | Eaton Corp Plc | ETN | G29183103 | $9.5M | 1.08% | 26,526 | SH |
| 32 | Ishares Msci Intl Quality Fact | IQLT | 46434V456 | $9.3M | 1.06% | 200,306 | SH |
| 33 | American Tower REIT | AMT | 03027X100 | $8.8M | 1.01% | 51,113 | SH |
| 34 | Verisk Analytics Inc Cl A | VRSK | 92345Y106 | $8.7M | 0.99% | 45,675 | SH |
| 35 | Alphabet Inc Cap Stock Cl C | GOOG | 02079K107 | $8.5M | 0.97% | 29,687 | SH |
| 36 | Synopsys Inc | SNPS | 871607107 | $8.3M | 0.94% | 20,858 | SH |
| 37 | Stryker Corp | SYK | 863667101 | $8.1M | 0.92% | 24,565 | SH |
| 38 | Ecolab Inc | ECL | 278865100 | $7.9M | 0.91% | 29,833 | SH |
| 39 | Meta Platforms Inc Cl A | META | 30303M102 | $7.9M | 0.90% | 13,857 | SH |
| 40 | Idexx Labs Inc | IDXX | 45168D104 | $7.4M | 0.84% | 13,156 | SH |
| 41 | Mondelez Intl Inc Cl A | MDLZ | 609207105 | $7.0M | 0.80% | 121,741 | SH |
| 42 | MSCI Inc Cl A | MSCI | 55354G100 | $6.7M | 0.76% | 12,379 | SH |
| 43 | American Wtr Wks Co Inc New | AWK | 030420103 | $6.6M | 0.75% | 48,594 | SH |
| 44 | Iqvia Holdings Inc | IQV | 46266C105 | $5.9M | 0.67% | 34,349 | SH |
| 45 | Waste Connections Inc | WCN | 94106B101 | $5.7M | 0.64% | 34,803 | SH |
| 46 | Chubb Limited | CB | H1467J104 | $5.7M | 0.64% | 17,341 | SH |
| 47 | iShares Tr S&P Small Cap 600 | IJR | 464287804 | $5.6M | 0.63% | 44,680 | SH |
| 48 | PepsiCo Inc | PEP | 713448108 | $5.5M | 0.63% | 35,433 | SH |
| 49 | iShares Tr S&P Mid Cap 400 | IJH | 464287507 | $5.4M | 0.61% | 79,830 | SH |
| 50 | Pgim Aaa Clo Etf | PAAA | 69344A834 | $5.3M | 0.60% | 103,050 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-08 | $876.9M | 164 | 0001398344-26-008750 |
| 2025-12-31 | 2026-01-29 | $941.8M | 163 | 0001398344-26-001587 |