Institutional Manager · CIK 0001801112
Great Diamond Partners, LLC
Portland, ME · File #028-19786
Latest AUM
$519.7M
Positions
227
Top-10 Concentration
49.1%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | ISHARES TR | 46432F842 | -105,512 | -$9.4M | +$847,075 |
| NEW | AMERICAN CENTY ETF TR | 025072604 | +116,438 | +$9.0M | $0 |
| NEW | BARRICK MNG CORP | 06849F108 | +54,953 | +$2.4M | $0 |
| ADD | VANGUARD INDEX FDS | 922908363 | +3,785 | +$2.4M | +$34,663 |
| REDUCE | AT&T INC | T-PC | -81,761 | -$2.0M | -$369,747 |
| ADD | ANGLOGOLD ASHANTI PLC | AU | +21,745 | +$1.9M | +$275,454 |
| REDUCE | T-MOBILE US INC | TMUSZ | -8,271 | -$1.7M | -$373,139 |
| NEW | NEWMONT CORP | NEMCL | +13,334 | +$1.3M | $0 |
| REDUCE | AMERIPRISE FINL INC | 03076C106 | -2,709 | -$1.3M | -$6,403 |
| ADD | ISHARES TR | 46435U515 | +48,997 | +$1.2M | -$9,004 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025227 pos · $519.7M
- 13F HOLDINGS REPORTQ/E Sep 2025225 pos · $515.6M
- 13F HOLDINGS REPORTQ/E Jun 2025225 pos · $473.5M
- 13F HOLDINGS REPORTQ/E Mar 2025179 pos · $365.8M
- 13F HOLDINGS REPORTQ/E Dec 2024185 pos · $386.6M
- 13F HOLDINGS REPORTQ/E Sep 2024195 pos · $393.6M
- 13F HOLDINGS REPORTQ/E Jun 2024211 pos · $425.5M
- 13F HOLDINGS REPORTQ/E Mar 2024220 pos · $435.5M
- 13F HOLDINGS REPORTQ/E Dec 2023220 pos · $369.4M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | VANGUARD INDEX FDS | 922908769 | 85,598 | $28.7M | 8.21% |
| 2 | ISHARES TR | 464287689 | 74,019 | $28.6M | 8.19% |
| 3 | ISHARES TR | 46432F842 | 288,477 | $25.8M | 7.38% |
| 4 | SPDR S&P 500 ETF TR | SPY | 22,915 | $15.6M | 4.47% |
| 5 | VANGUARD INDEX FDS | 922908736 | 30,323 | $14.8M | 4.23% |
| 6 | MICROSOFT CORP | MSFT | 29,576 | $14.3M | 4.09% |
| 7 | VANGUARD INDEX FDS | 922908652 | 60,878 | $12.7M | 3.64% |
| 8 | PROCTER AND GAMBLE CO | 742718109 | 79,052 | $11.3M | 3.24% |
| 9 | SIMPLIFY EXCHANGE TRADED FUN | 82889N723 | 480,607 | $9.9M | 2.84% |
| 10 | IDEXX LABS INC | 45168D104 | 14,371 | $9.7M | 2.78% |
| 11 | AMERICAN CENTY ETF TR | 025072604 | 116,438 | $9.0M | 2.56% |
| 12 | APPLE INC | AAPL | 28,251 | $7.7M | 2.20% |
| 13 | ISHARES TR | 464288166 | 64,417 | $7.1M | 2.03% |
| 14 | NVIDIA CORPORATION | NVDA | 37,231 | $6.9M | 1.99% |
| 15 | BROADCOM INC | AVGO | 20,057 | $6.9M | 1.99% |
| 16 | PIMCO ETF TR | 72201R585 | 256,220 | $6.8M | 1.95% |
| 17 | ALPHABET INC | GOOG | 19,666 | $6.2M | 1.76% |
| 18 | ISHARES TR | 464288661 | 50,482 | $6.0M | 1.72% |
| 19 | FIRST TR EXCHNG TRADED FD VI | 33740F763 | 105,319 | $6.0M | 1.71% |
| 20 | INVESCO EXCHANGE TRADED FD T | IVZ | 29,975 | $5.7M | 1.64% |