Great Diamond Partners, LLC — 13F Holdings & Portfolio
CIK 1801112 · latest 13F-HR filed 2026-05-12
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
$519.5M
Long-equity book
Holdings
228
Distinct positions
Period
2026-03-31
Filed 2026-05-12
Q/Q Activity
+27 / −26 / ↑81 / ↓71
vs 2025-12-31
Firm Profile & Key People
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- CORNING INC$3.0M +215.4%
- CATERPILLAR INC$2.5M +484.7%
- KLA CORP$1.8M +66.2%
- TAIWAN SEMICONDUCTOR MANUFAC$1.7M +91.4%
- AMERICAN CENTY ETF TR$1.7M +18.6%
Top Trims
- STATE STR SPDR S&P 500 ETF T-$13.7M -87.6%
- VANGUARD INDEX FDS-$7.6M -51.7%
- MICROSOFT CORP-$3.8M -26.3%
- ORACLE CORP-$3.2M -69.4%
- EATON CORP PLC-$2.8M -77.4%
New Positions
- DIMENSIONAL ETF TRUST$10.4M
- HARBOR ETF TRUST$8.8M
- BLACKROCK ETF TRUST$7.0M
- SPDR SERIES TRUST$3.4M
- LAS VEGAS SANDS CORP$2.9M
Exited Positions
- FIRST TR EXCHNG TRADED FD VI$6.0M
- INVESCO EXCH TRADED FD TR II$2.8M
- ISHARES TR$2.7M
- ARES MANAGEMENT CORPORATION$2.7M
- VANECK ETF TRUST$2.6M
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 | VANGUARD INDEX FDS | VTI | 922908769 | $27.7M | 5.33% | 86,244 | SH |
| 2 | ISHARES TR | IWV | 464287689 | $26.7M | 5.15% | 72,135 | SH |
| 3 | ISHARES TR | IEFA | 46432F842 | $25.6M | 4.92% | 282,384 | SH |
| 4 | VANGUARD INDEX FDS | VXF | 922908652 | $12.7M | 2.44% | 61,526 | SH |
| 5 | SIMPLIFY EXCHANGE TRADED FUN | AGGH | 82889N723 | $11.6M | 2.23% | 569,038 | SH |
| 6 | PROCTER & GAMBLE CO | PG | 742718109 | $11.4M | 2.19% | 78,811 | SH |
| 7 | AMERICAN CENTY ETF TR | AVEM | 025072604 | $10.6M | 2.05% | 132,028 | SH |
| 8 | MICROSOFT CORP | MSFT | 594918104 | $10.5M | 2.03% | 28,488 | SH |
| 9 | DIMENSIONAL ETF TRUST | DFAI | 25434V203 | $10.4M | 2.00% | 267,142 | SH |
| 10 | HARBOR ETF TRUST | HGER | 41151J505 | $8.8M | 1.68% | 282,220 | SH |
| 11 | IDEXX LABS INC | IDXX | 45168D104 | $8.1M | 1.55% | 14,346 | SH |
| 12 | PIMCO ETF TR | PYLD | 72201R585 | $8.0M | 1.54% | 304,633 | SH |
| 13 | ISHARES TR | AGZ | 464288166 | $7.8M | 1.51% | 71,448 | SH |
| 14 | APPLE INC | AAPL | 037833100 | $7.2M | 1.38% | 28,231 | SH |
| 15 | VANGUARD INDEX FDS | VUG | 922908736 | $7.1M | 1.38% | 16,355 | SH |
| 16 | BLACKROCK ETF TRUST | DYNF | 09290C103 | $7.0M | 1.35% | 120,858 | SH |
| 17 | ISHARES TR | IEI | 464288661 | $6.9M | 1.32% | 57,761 | SH |
| 18 | BROADCOM INC | AVGO | 11135F101 | $6.5M | 1.24% | 20,893 | SH |
| 19 | NVIDIA CORPORATION | NVDA | 67066G104 | $6.4M | 1.23% | 36,774 | SH |
| 20 | ISHARES TR | IJH | 464287507 | $6.2M | 1.20% | 92,030 | SH |
| 21 | INVESCO EXCHANGE TRADED FD T | RSP | 46137V357 | $5.8M | 1.12% | 30,415 | SH |
| 22 | ISHARES TR | IBDT | 46435U515 | $5.6M | 1.08% | 220,720 | SH |
| 23 | EXXON MOBIL CORP | XOM | 30231G102 | $5.3M | 1.03% | 31,426 | SH |
| 24 | ALPHABET INC | GOOGL | 02079K305 | $5.3M | 1.02% | 18,392 | SH |
| 25 | WASTE MGMT INC DEL | WM | 94106L109 | $4.9M | 0.94% | 21,192 | SH |
| 26 | ALPHABET INC | GOOG | 02079K107 | $4.5M | 0.87% | 15,724 | SH |
| 27 | KLA CORP | KLAC | 482480100 | $4.4M | 0.85% | 3,016 | SH |
| 28 | CORNING INC | GLW | 219350105 | $4.4M | 0.85% | 32,465 | SH |
| 29 | ISHARES TR | IBDR | 46435GAA0 | $4.3M | 0.83% | 176,985 | SH |
| 30 | FIRST TR EXCHANGE TRADED FD | TDIV | 33738R118 | $4.2M | 0.81% | 44,994 | SH |
| 31 | ISHARES TR | IBDS | 46435UAA9 | $4.1M | 0.79% | 170,074 | SH |
| 32 | CARDINAL HEALTH INC | CAH | 14149Y108 | $4.1M | 0.79% | 19,319 | SH |
| 33 | WILLIAMS SONOMA INC | WSM | 969904101 | $4.1M | 0.78% | 22,344 | SH |
| 34 | WELLTOWER INC | WELL | 95040Q104 | $3.9M | 0.75% | 19,836 | SH |
| 35 | AMGEN INC | AMGN | 031162100 | $3.6M | 0.70% | 10,352 | SH |
| 36 | ANGLOGOLD ASHANTI PLC | AU | G0378L100 | $3.6M | 0.70% | 37,379 | SH |
| 37 | TAIWAN SEMICONDUCTOR MANUFAC | TSM | 874039100 | $3.6M | 0.69% | 10,645 | SH |
| 38 | PARKER-HANNIFIN CORP | PH | 701094104 | $3.6M | 0.68% | 3,973 | SH |
| 39 | ELI LILLY & CO | LLY | 532457108 | $3.5M | 0.67% | 3,768 | SH |
| 40 | AMAZON COM INC | AMZN | 023135106 | $3.5M | 0.67% | 16,603 | SH |
| 41 | JPMORGAN CHASE & CO | JPM | 46625H100 | $3.4M | 0.65% | 11,554 | SH |
| 42 | BANK NEW YORK MELLON CORP | BK | 064058100 | $3.4M | 0.65% | 28,552 | SH |
| 43 | SPDR SERIES TRUST | SPHY | 78468R606 | $3.4M | 0.65% | 144,142 | SH |
| 44 | ISHARES TR | EMB | 464288281 | $3.3M | 0.63% | 34,688 | SH |
| 45 | ISHARES TR | IGIB | 464288638 | $3.2M | 0.62% | 60,464 | SH |
| 46 | SPDR SERIES TRUST | SJNK | 78468R408 | $3.2M | 0.61% | 126,406 | SH |
| 47 | CATERPILLAR INC | CAT | 149123101 | $3.1M | 0.59% | 4,326 | SH |
| 48 | TAPESTRY INC | TPR | 876030107 | $3.0M | 0.59% | 21,607 | SH |
| 49 | LAS VEGAS SANDS CORP | LVS | 517834107 | $2.9M | 0.56% | 53,572 | SH |
| 50 | HOME DEPOT INC | HD | 437076102 | $2.8M | 0.54% | 8,531 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-12 | $519.5M | 228 | 0001172661-26-001739 |
| 2025-12-31 | 2026-02-06 | $519.7M | 227 | 0001172661-26-000514 |
| 2025-09-30 | 2025-10-20 | $515.6M | 225 | 0001172661-25-004336 |