Great Diamond Partners, LLC
Long book
$519.5M
Q1 2026
Positions
228
Top-10 weight
30%
concentration
Last quarter
+10.4%
SPY +14.8%
Turnover
21%
of book per quarter
Strategy in plain words
auto-generated from filingsGreat Diamond Partners, LLC is a wealth-management firm allocating client money, running a $519.5M US long book across 228 positions.
The portfolio is moderately concentrated (top 10 ≈ 30% of the book). Turnover is modest: positions are typically held for years. Current anchor positions: VANGUARD TOTAL STOCK MKT ETF, ISHARES RUSSELL 3000 ETF, ISHARES CORE MSCI EAFE ETF, VANGUARD EXTENDED MARKET ETF, SIMPLIFY AGGREGATE BOND ETF.
Over the last 9 quarters its long book ran on average 1pp per quarter behind the S&P 500, beating the index in 3 of 9 quarters. Its holdings are mechanical (indexing / client flows), so position changes carry no stock-picking signal.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+1.9%
Q2 2024
+5.9%
Q3 2024
+0.3%
Q4 2024
-3.1%
Q1 2025
+10.1%
Q2 2025
+6.6%
Q3 2025
+1.5%
Q4 2025
-2.5%
Q1 2026
+10.4%
Sector allocation
Technology 25%
Industrials 12%
Financials 11%
Other 10%
Consumer discretionary 10%
Healthcare 8%
Materials 8%
Services media 6%
Long book by quarter
What does Great Diamond own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| PG PROCTER & GAMBLE CO/THE | Other | 78.8K | $11.4M | 2.2% | -0.3% |
| MSFT MICROSOFT CORP | Technology | 28.5K | $10.5M | 2.0% | -3.7% |
| IDXX IDEXX LABORATORIES INC | Materials | 14.3K | $8.1M | 1.6% | -0.2% |
| AAPL APPLE INC | Technology | 28.2K | $7.2M | 1.4% | -0.1% |
| AVGO BROADCOM INC | Technology | 20.9K | $6.5M | 1.2% | +4.2% |
| NVDA NVIDIA CORP | Technology | 36.8K | $6.4M | 1.2% | -1.2% |
| XOM EXXON MOBIL CORP | Energy | 31.4K | $5.3M | 1.0% | -0.2% |
| GOOGL ALPHABET INC-CL A | Technology | 18.4K | $5.3M | 1.0% | -6.5% |
| WM WASTE MANAGEMENT INC | Utilities | 21.2K | $4.9M | 0.9% | +2.8% |
| GOOG ALPHABET INC-CL C | Technology | 15.7K | $4.5M | 0.9% | -2.6% |
| KLAC KLA CORP | Other | 3.0K | $4.4M | 0.9% | +37.2% |
| GLW CORNING INC | Industrials | 32.5K | $4.4M | 0.8% | +103.1% |
| CAH CARDINAL HEALTH INC | Consumer discretionary | 19.3K | $4.1M | 0.8% | +6.8% |
| WSM WILLIAMS-SONOMA INC | Consumer discretionary | 22.3K | $4.1M | 0.8% | +2.8% |
| AMGN AMGEN INC | Healthcare | 10.4K | $3.6M | 0.7% | -0.2% |
| AU ANGLOGOLD ASHANTI PLC | Materials | 37.4K | $3.6M | 0.7% | -6.9% |
| PH PARKER HANNIFIN CORP | Industrials | 4.0K | $3.6M | 0.7% | +1.0% |
| LLY ELI LILLY & CO | Healthcare | 3.8K | $3.5M | 0.7% | -7.4% |
| AMZN AMAZON.COM INC | Consumer discretionary | 16.6K | $3.5M | 0.7% | -7.4% |
| JPM JPMORGAN CHASE & CO | Financials | 11.6K | $3.4M | 0.7% | +29.5% |
| BNY BANK OF NEW YORK MELLON CORP | Financials | 28.6K | $3.4M | 0.7% | +6.4% |
| CAT CATERPILLAR INC | Industrials | 4.3K | $3.1M | 0.6% | +372.8% |
| TPR TAPESTRY INC | Other | 21.6K | $3.0M | 0.6% | +2.4% |
| LVS LAS VEGAS SANDS CORP | Services media | 53.6K | $2.9M | 0.6% | New |
| HD HOME DEPOT INC | Consumer discretionary | 8.5K | $2.8M | 0.5% | -1.0% |
| NEE NEXTERA ENERGY INC | Utilities | 30.2K | $2.8M | 0.5% | -2.4% |
| UNM UNUM GROUP | Financials | 37.8K | $2.8M | 0.5% | +2.6% |
| BLK BLACKROCK INC | Financials | 2.8K | $2.7M | 0.5% | +1.9% |
| AFL AFLAC INC | Financials | 24.2K | $2.6M | 0.5% | +2.6% |
| GRMN GARMIN LTD | Technology | 11.3K | $2.6M | 0.5% | +5.9% |
| WMB WILLIAMS COS INC | Utilities | 35.7K | $2.6M | 0.5% | +2.4% |
| ADP AUTOMATIC DATA PROCESSING | Technology | 12.2K | $2.5M | 0.5% | -2.9% |
| CMI CUMMINS INC | Industrials | 4.5K | $2.4M | 0.5% | New |
| ABBV ABBVIE INC | Healthcare | 10.8K | $2.4M | 0.5% | +9.0% |
| B BARRICK MINING CORP | Materials | 57.0K | $2.3M | 0.4% | +3.8% |
| R RYDER SYSTEM INC | Services media | 11.1K | $2.3M | 0.4% | +1.5% |
| ABT ABBOTT LABORATORIES | Healthcare | 22.0K | $2.3M | 0.4% | -1.0% |
| PAYX PAYCHEX INC | Services media | 24.1K | $2.2M | 0.4% | +1.1% |
| MS MORGAN STANLEY | Financials | 13.1K | $2.2M | 0.4% | -1.0% |
| TJX TJX COMPANIES INC | Consumer discretionary | 13.3K | $2.1M | 0.4% | +2.9% |
| COP CONOCOPHILLIPS | Energy | 15.0K | $2.0M | 0.4% | -1.4% |
| V VISA INC-CLASS A SHARES | Services media | 6.3K | $1.9M | 0.4% | -2.1% |
| AMP AMERIPRISE FINANCIAL INC | Financials | 4.2K | $1.9M | 0.4% | -1.9% |
| META META PLATFORMS INC-CLASS A | Technology | 3.2K | $1.8M | 0.4% | +1.7% |
| WMT WALMART INC | Consumer discretionary | 13.8K | $1.7M | 0.3% | -23.0% |
| CVX CHEVRON CORP | Energy | 8.2K | $1.7M | 0.3% | +1.1% |
| NEM NEWMONT CORP | Materials | 14.2K | $1.5M | 0.3% | +6.3% |
| BRK/B BERKSHIRE HATHAWAY INC-CL B | Financials | 3.0K | $1.5M | 0.3% | -0.3% |
| JNJ JOHNSON & JOHNSON | Healthcare | 5.9K | $1.4M | 0.3% | -0.8% |
| ORCL ORACLE CORP | Technology | 9.7K | $1.4M | 0.3% | -59.5% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 12, 2026 | 228 | $519.5M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 6, 2026 | 227 | $519.7M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Oct 20, 2025 | 225 | $515.6M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 13, 2025 | 225 | $473.5M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 13, 2025 | 179 | $365.8M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Jan 23, 2025 | 185 | $386.6M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Oct 25, 2024 | 195 | $393.6M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Jul 29, 2024 | 211 | $425.5M | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 8, 2024 | 220 | $435.5M | canonical | SEC ↗ |