CIK: 0001801112
Total reported value
$519.5M
Reporting period: 2026-03-31 · Number of holdings: 228
Great Diamond Partners, LLC disclosed 228 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $519.5M and a quarterly turnover rate of 36.5%.
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Great Diamond Partners, LLC's disclosed holdings carry a Herfindahl concentration index of 0.016 — mathematically equivalent to about 64 equally-sized positions, well below its 228 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.61), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 46% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Trim SPY
-87.0% -$13.7M
Trim VUG
-46.1% -$7.6M
Trim MSFT
-3.7% -$3.8M
Trim ORCL
-59.5% -$3.2M
Add GLW
+103.1% $3.0M
Trim ETN
-79.9% -$2.8M
Showing top 200 holdings (of 228 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | VTI | Vanguard Total Stock Mkt ETF | ETF-Other | 5.33% | -0.19% | +0.75% | |
| 2 | IWV | Ishares Russell 3000 ETF | ETF-Other | 5.15% | -0.36% | -2.55% | |
| 3 | IEFA | Ishares Core Msci Eafe ETF | ETF-Other | 4.92% | — | -2.11% | |
| 4 | VXF | Vanguard Extended Market ETF | ETF-Other | 2.44% | — | +1.06% | |
| 5 | AGGH | Simplify Aggregate Bond ETF | ETF-Other | 2.23% | +0.32% | +18.40% | |
| 6 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 2.19% | — | -0.30% | |
| 7 | AVEM | Avantis Emerging Markets Eq | ETF-Emerging Markets | 2.05% | +0.32% | +13.39% | |
| 8 | MSFT | Microsoft CORP | Stock-Tech | 2.03% | -0.72% | -3.68% | |
| 9 | DFAI | Dimensional International Co | ETF-Other | 2.00% | +2.00% | NEW | |
| 10 | HGER | Harbor Commodity All Weather | ETF-Commodities | 1.68% | +1.68% | NEW | |
| 11 | IDXX | Idexx Laboratories INC | Stock-Healthcare | 1.55% | -0.32% | -0.17% | |
| 12 | PYLD | Pimco Multisector Bond Actv | ETF-Other | 1.54% | +0.22% | +18.90% | |
| 13 | AGZ | Ishares Agency Bond ETF | ETF-Other | 1.51% | — | +10.91% | |
| 14 | AAPL | Apple INC | Stock-Tech | 1.38% | — | -0.07% | |
| 15 | VUG | Vanguard Growth ETF | ETF-Other | 1.38% | -1.47% | -46.06% | |
| 16 | DYNF | Ishrs US E F R A Etf-usd INC | ETF-Other | 1.35% | +1.35% | NEW | |
| 17 | IEI | Ishares 3-7 Year Treasury Bo | ETF-Gov Bonds | 1.32% | — | +14.42% | |
| 18 | AVGO | Broadcom INC | Stock-Tech | 1.24% | — | +4.17% | |
| 19 | NVDA | Nvidia CORP | Stock-Tech | 1.23% | — | -1.23% | |
| 20 | IJH | Ishares Core S&p Midcap ETF | ETF-Other | 1.20% | — | +8.14% | |
| 21 | RSP | Invesco S&p 500 Equal Weight | ETF-Large Cap & Growth | 1.12% | — | +1.47% | |
| 22 | IBDT | Ishares Ibonds Dec 2028 ETF | ETF-Other | 1.08% | — | +17.70% | |
| 23 | XOM | Exxon Mobil CORP | Stock-Energy | 1.03% | +0.30% | -0.23% | |
| 24 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 1.02% | -0.16% | -6.48% | |
| 25 | WM | Waste Management INC | Stock-Industrials | 0.94% | — | +2.85% | |
| 26 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 0.87% | — | -2.61% | |
| 27 | KLAC | Kla CORP | Stock-Tech | 0.85% | +0.34% | +37.15% | |
| 28 | GLW | Corning INC | Stock-Tech | 0.85% | +0.58% | +103.12% | |
| 29 | IBDR | Ishares Ibonds Dec 2026 Term | ETF-Other | 0.83% | — | +23.95% | |
| 30 | TDIV | Ft Nasdaq Tech Dvd Index Fd | ETF-Tech | 0.81% | — | -1.85% | |
| 31 | IBDS | Ishrs Ibnds Dec 27 CORP ETF | ETF-Other | 0.79% | — | +11.69% | |
| 32 | CAH | Cardinal Health INC | Stock-Healthcare | 0.79% | — | +6.79% | |
| 33 | WSM | Williams-sonoma INC | Stock-Consumer Disc | 0.78% | — | +2.79% | |
| 34 | WELL | Welltower INC | Stock-Real Estate | 0.75% | — | +1.78% | |
| 35 | AMGN | Amgen INC | Stock-Healthcare | 0.70% | — | -0.18% | |
| 36 | AU | AngloGold Ashanti plc | Stock-Materials | 0.70% | — | -6.95% | |
| 37 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 0.69% | +0.33% | +72.14% | |
| 38 | PH | Parker Hannifin CORP | Stock-Industrials | 0.68% | — | +1.04% | |
| 39 | LLY | Eli Lilly & Co | Stock-Healthcare | 0.67% | -0.17% | -7.44% | |
| 40 | AMZN | Amazon.com INC | Stock-Consumer Disc | 0.67% | — | -7.40% | |
| 41 | JPM | Jpmorgan Chase & Co | Stock-Financials | 0.65% | — | +29.53% | |
| 42 | BNY | Bank Of New York Mellon CORP | Stock-Financials | 0.65% | — | +6.42% | |
| 43 | SPHY | Ss Spdr P High Yield ETF | ETF-High Yield | 0.65% | +0.65% | NEW | |
| 44 | EMB | Ishares Jp Morgan Usd Emergi | ETF-Other | 0.63% | — | +11.09% | |
| 45 | IGIB | Ishares 5-10y Inv Grade CORP | ETF-Corp Bonds | 0.62% | — | +12.46% | |
| 46 | SJNK | Ss Spdr Bb St Hi Yield ETF | ETF-Other | 0.61% | — | +22.33% | |
| 47 | CAT | Caterpillar INC | Stock-Industrials | 0.59% | +0.49% | +372.79% | |
| 48 | TPR | Tapestry INC | Stock-Consumer Disc | 0.59% | — | +2.40% | |
| 49 | LVS | Las Vegas Sands CORP | Stock-Consumer Disc | 0.56% | +0.56% | NEW | |
| 50 | HD | Home Depot INC | Stock-Consumer Disc | 0.54% | — | -1.02% |
Performance for Q3 2026
+2%
Performance Last 4 Quarters
+12.8%
Based on 76% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 228 | $519.5M | 37 | |
| 2025-12-31 | 227 | $519.7M | 15 | |
| 2025-09-30 | 225 | $515.6M | 48 | |
| 2025-06-30 | 225 | $473.5M | 0 | |
| 2025-03-31 | 179 | $365.8M | 100 | |
| 2024-12-31 | 185 | $386.6M | 0 | |
| 2024-09-30 | 195 | $393.6M | 0 | |
| 2024-06-30 | 211 | $425.5M | 0 | |
| 2024-03-31 | 220 | $435.5M | 0 | |
| 2023-12-31 | 230 | $405.8M | 0 | |
| 2023-09-30 | 220 | $369.4M | 0 | |
| 2023-06-30 | 219 | $378.8M | 0 | |
| 2023-03-31 | 214 | $345.3M | 0 | |
| 2022-12-31 | 211 | $324.9M | 0 | |
| 2022-09-30 | 197 | $292.6M | 0 | |
| 2022-06-30 | 200 | $300.8M | 0 | |
| 2022-03-31 | 214 | $359.3M | 0 | |
| 2021-12-31 | 213 | $388.4M | 0 | |
| 2021-09-30 | 205 | $364.8M | 0 | |
| 2021-06-30 | 196 | $353.6M | 100 | |
| 2021-03-31 | 195 | $325.0M | 31 | |
| 2020-12-31 | 178 | $313.7M | 33 | |
| 2020-09-30 | 158 | $272.5M | 23 | |
| 2020-06-30 | 147 | $241.6M | 28 | |
| 2020-03-31 | 126 | $194.3M | 46 | |
| 2019-12-31 | 692 | $263.0M | — |
Great Diamond Partners, LLC's most significant position changes for 2026-03-31: New buy: Dimensional International Co (DFAI); New buy: Harbor Commodity All Weather (HGER); New buy: Ishrs US E F R A Etf-usd INC (DYNF); Sold out: Ft Vest US Equity Buffer ETF (FFEB); New buy: Ss Spdr P High Yield ETF (SPHY).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GLW | Corning INC | +0.6% | +103.12% | Add |
| 2 | CAT | Caterpillar INC | +0.5% | +372.79% | Add |
| 3 | KLAC | Kla CORP | +0.3% | +37.15% | Add |
| 4 | TSM | Taiwan Semiconductor-sp Adr | +0.3% | +72.14% | Add |
| 5 | AVEM | Avantis Emerging Markets Eq | +0.3% | +13.39% | Add |
| 6 | AGGH | Simplify Aggregate Bond ETF | +0.3% | +18.40% | Add |
| 7 | XOM | Exxon Mobil CORP | +0.3% | -0.23% | Trim |
| 8 | PYLD | Pimco Multisector Bond Actv | +0.2% | +18.90% | Add |
| 9 | GOOGL | Alphabet Inc-cl A | -0.2% | -6.48% | Trim |
| 10 | LLY | Eli Lilly & Co | -0.2% | -7.44% | Trim |
| 11 | VTI | Vanguard Total Stock Mkt ETF | -0.2% | +0.75% | Add |
| 12 | IBM | Intl Business Machines CORP | -0.2% | -68.95% | Trim |
| 13 | IDXX | Idexx Laboratories INC | -0.3% | -0.17% | Trim |
| 14 | ACN | Accenture plc | -0.3% | -54.45% | Trim |
| 15 | IWV | Ishares Russell 3000 ETF | -0.4% | -2.55% | Trim |
| 16 | VOO | Vanguard S&p 500 ETF | -0.5% | -61.16% | Trim |
| 17 | ETN | Eaton Corporation plc | -0.5% | -79.92% | Trim |
| 18 | ORCL | Oracle CORP | -0.6% | -59.46% | Trim |
| 19 | MSFT | Microsoft CORP | -0.7% | -3.68% | Trim |
| 20 | VUG | Vanguard Growth ETF | -1.5% | -46.06% | Trim |
| 21 | SPY | Ss Spdr S&p 500 ETF Trust-us | -2.6% | -87.04% | Trim |
| 22 | DFAI | Dimensional International Co | — | NEW | New buy |
| 23 | HGER | Harbor Commodity All Weather | — | NEW | New buy |
| 24 | DYNF | Ishrs US E F R A Etf-usd INC | — | NEW | New buy |
| 25 | FFEB | Ft Vest US Equity Buffer ETF | — | EXIT | Sold out |
| 26 | SPHY | Ss Spdr P High Yield ETF | — | NEW | New buy |
| 27 | LVS | Las Vegas Sands CORP | — | NEW | New buy |
| 28 | BKLN | Invesco Senior Loan ETF | — | EXIT | Sold out |
| 29 | TAN | Invesco Solar ETF | — | NEW | New buy |
| 30 | IAI | Ishares U.s. Broker-dealers | — | EXIT | Sold out |
| 31 | XOP | Ss Spdr S&p Og Exp & Prod | — | NEW | New buy |
| 32 | ARES | Ares Management CORP - A | — | EXIT | Sold out |
| 33 | SMH | Vaneck Semiconductor ETF | — | NEW | New buy |
| 34 | XME | Ss Spdr S&p Metals Mining | — | NEW | New buy |
| 35 | XTL | Ss Spdr S&p Telecom ETF | — | NEW | New buy |
| 36 | GDX | Vaneck Gold Miners ETF | — | EXIT | Sold out |
| 37 | QTUM | Defiance Quantum ETF | — | NEW | New buy |
| 38 | DTCR | Global X Data Center & Digit | — | NEW | New buy |
| 39 | DMBS | Doubleline Mortgage ETF | — | NEW | New buy |
| 40 | SOCL | Global X Social Media ETF | — | EXIT | Sold out |
| 41 | CIBR | First Trust Nasdaq Cybersecu | — | EXIT | Sold out |
| 42 | SKYY | First Trust Cloud Computing | — | EXIT | Sold out |
| 43 | IGV | Ishares Expanded Tech-softwa | — | EXIT | Sold out |
| 44 | CMI | Cummins INC | — | NEW | New buy |
| 45 | RTH | Vaneck Retail ETF | — | EXIT | Sold out |
| 46 | MBB | Ishares Mbs ETF | — | EXIT | Sold out |
| 47 | ITW | Illinois Tool Works | — | EXIT | Sold out |
| 48 | LMT | Lockheed Martin CORP | — | EXIT | Sold out |
| 49 | DEM | Wisdomtree Emerging Markets | — | NEW | New buy |
| 50 | USMV | Ishares Msci USA Min Vol Fac | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-12 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-06 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-20 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-13 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-13 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-23 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-25 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-07-29 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-08 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-07 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-10-19 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-07-17 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-04 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-01 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-10-24 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-26 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-05 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-01-26 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-10-21 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-07-26 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-04 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-01-26 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-10-19 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-04 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-01 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-07 | 13F-HR | View on EDGAR |
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