CIK: 0001037558
Total reported value
$826.8M
Reporting period: 2023-09-30 · Number of holdings: 335
FOSTER DYKEMA CABOT & CO INC/MA disclosed 335 holdings in its latest 13F filing for the period ending 2023-09-30, with total reported value of $826.8M and a quarterly turnover rate of 0.0%.
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Foster Dykema Cabot & Co Inc/ma's disclosed holdings carry a Herfindahl concentration index of 0.076 — mathematically equivalent to about 13 equally-sized positions, well below its 335 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 4.96), 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 47% 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.
No holding changes this quarter
Showing top 200 holdings (of 335 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 22.03% | — | +0.17% | |
| 2 | JPST | Jpmorgan Ultra-short Income | ETF-Other | 10.66% | — | +2.79% | |
| 3 | ICSH | Ishares Ultra Short Duration | ETF-Other | 4.20% | — | +0.90% | |
| 4 | AMZN | Amazon.com INC | Stock-Consumer Disc | 4.00% | — | -1.38% | |
| 5 | MSFT | Microsoft CORP | Stock-Tech | 3.77% | — | -0.11% | |
| 6 | LLY | Eli Lilly & Co | Stock-Healthcare | 3.50% | — | -0.21% | |
| 7 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 3.17% | — | -0.50% | |
| 8 | APH | Amphenol Corp-cl A | Stock-Tech | 2.96% | — | -0.26% | |
| 9 | PWR | Quanta Services INC | Stock-Industrials | 2.78% | — | -0.26% | |
| 10 | TMO | Thermo Fisher Scientific INC | Stock-Healthcare | 2.61% | — | -0.04% | |
| 11 | JPM | Jpmorgan Chase & Co | Stock-Financials | 2.58% | — | +0.24% | |
| 12 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 2.57% | — | -0.86% | |
| 13 | VRTX | Vertex Pharmaceuticals INC | Stock-Healthcare | 2.50% | — | +0.07% | |
| 14 | XLI | Ss Industrial Select Sector | ETF-Other | 2.48% | — | +0.13% | |
| 15 | ACN | Accenture plc | Stock-Tech | 2.45% | — | -0.24% | |
| 16 | AXP | American Express Co | Stock-Financials | 2.37% | — | -0.12% | |
| 17 | PLD | Prologis INC | Stock-Real Estate | 2.18% | — | +0.35% | |
| 18 | XLV | Ss Health Care Select Sector | ETF-Other | 2.12% | — | +0.51% | |
| 19 | WM | Waste Management INC | Stock-Industrials | 2.06% | — | +0.38% | |
| 20 | LOW | Lowe's Cos INC | Stock-Consumer Disc | 1.88% | — | -0.06% | |
| 21 | NOC | Northrop Grumman CORP | Stock-Industrials | 1.78% | — | +0.03% | |
| 22 | AAPL | Apple INC | Stock-Tech | 1.75% | — | -1.28% | |
| 23 | XLF | Ss Financial Select Sector | ETF-Other | 1.68% | — | +0.31% | |
| 24 | IEFA | Ishares Core Msci Eafe ETF | ETF-Other | 1.63% | — | -2.50% | |
| 25 | VTI | Vanguard Total Stock Mkt ETF | ETF-Other | 1.55% | — | -2.07% | |
| 26 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 0.59% | — | — | |
| 27 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 0.58% | — | -0.77% | |
| 28 | XLK | Ss Technology Select Sector | ETF-Tech | 0.55% | — | -0.28% | |
| 29 | SPYX | Ss Spdr S&p 500 Foss Fl ETF | ETF-Large Cap & Growth | 0.47% | — | — | |
| 30 | IWF | Ishares Russell 1000 Growth | ETF-Other | 0.42% | — | -1.72% | |
| 31 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 0.41% | — | — | |
| 32 | BRK-A | Berkshire Hathaway Inc-cl A | Stock-Other | 0.32% | — | — | |
| 33 | VOO | Vanguard S&p 500 ETF | ETF-Large Cap & Growth | 0.29% | — | -13.55% | |
| 34 | IWD | Ishares Russell 1000 Value E | ETF-Other | 0.25% | — | — | |
| 35 | PEP | Pepsico INC | Stock-Consumer Staples | 0.23% | — | +5.56% | |
| 36 | IVV | Ishares Core S&p 500 ETF | ETF-Large Cap & Growth | 0.21% | — | +47.09% | |
| 37 | SDG | Ish Msci Glob Sust Deve Goal | ETF-Other | 0.19% | — | — | |
| 38 | RSP | Invesco S&p 500 Equal Weight | ETF-Large Cap & Growth | 0.17% | — | +64.22% | |
| 39 | IJR | Ishares Core S&p Small-cap E | ETF-Small Cap | 0.11% | — | — | |
| 40 | MRK | Merck & Co. INC. | Stock-Healthcare | 0.11% | — | +9.28% | |
| 41 | MCD | Mcdonald's CORP | Stock-Consumer Disc | 0.11% | — | — | |
| 42 | KO | Coca-cola Co/the | Stock-Consumer Staples | 0.11% | — | — | |
| 43 | PHYS | Sprott Physical Gold Trust | Stock-Other | 0.10% | — | — | |
| 44 | ✓ | Enterprise Bancorp INC Mass | Stock-Other | 0.10% | — | — | |
| 45 | XOM | Exxon Mobil CORP | Stock-Energy | 0.10% | — | +18.71% | |
| 46 | IWR | Ishares Russell Mid-cap ETF | ETF-Other | 0.09% | — | — | |
| 47 | JNJ | Johnson & Johnson | Stock-Healthcare | 0.09% | — | +18.70% | |
| 48 | CSCO | Cisco Systems INC | Stock-Tech | 0.08% | — | — | |
| 49 | IVW | Ishares S&p 500 Growth ETF | ETF-Large Cap & Growth | 0.08% | — | — | |
| 50 | DIS | Walt Disney Co/the | Stock-Comm Services | 0.08% | — | +2.53% |
Performance for Q3 2026
+1.2%
Performance Last 4 Quarters
+19.1%
Based on 73% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2023-09-30 | 335 | $826.8M | 0 | |
| 2023-06-30 | 391 | $849.9M | 0 | |
| 2023-03-31 | 249 | $777.2M | 0 | |
| 2022-12-31 | 77 | $713.9M | 0 | |
| 2022-09-30 | 105 | $796.2M | 0 | |
| 2022-06-30 | 106 | $810.7M | 0 | |
| 2022-03-31 | 95 | $829.0M | 0 | |
| 2021-12-31 | 94 | $886.7M | 0 | |
| 2021-09-30 | 92 | $802.3M | 0 | |
| 2021-06-30 | 96 | $801.1M | 96 | |
| 2021-03-31 | 92 | $740.1M | 9 | |
| 2020-12-31 | 95 | $712.9M | 23 | |
| 2020-09-30 | 90 | $609.1M | 10 | |
| 2020-06-30 | 88 | $553.1M | 33 | |
| 2020-03-31 | 84 | $515.9M | 34 | |
| 2019-12-31 | 95 | $711.8M | 20 | |
| 2019-09-30 | 96 | $677.4M | 5 | |
| 2019-06-30 | 98 | $660.9M | 15 | |
| 2019-03-31 | 97 | $618.6M | 14 | |
| 2018-12-31 | 93 | $553.1M | 13 | |
| 2018-09-30 | 96 | $617.5M | 5 | |
| 2018-06-30 | 97 | $597.2M | 17 | |
| 2018-03-31 | 98 | $587.5M | 5 | |
| 2017-12-31 | 99 | $597.9M | 14 | |
| 2017-09-30 | 93 | $570.3M | 7 | |
| 2017-06-30 | 106 | $558.2M | 10 | |
| 2017-03-31 | 106 | $550.4M | 16 | |
| 2016-12-31 | 108 | $531.7M | 41 | |
| 2016-09-30 | 114 | $457.9M | 24 | |
| 2016-06-30 | 90 | $428.4M | 14 | |
| 2016-03-31 | 87 | $410.5M | 8 | |
| 2015-12-31 | 86 | $399.6M | 26 | |
| 2015-09-30 | 87 | $391.2M | 25 | |
| 2015-06-30 | 90 | $385.2M | 17 | |
| 2015-03-31 | 89 | $408.6M | 10 | |
| 2014-12-31 | 92 | $421.9M | 26 | |
| 2014-09-30 | 92 | $412.2M | 8 | |
| 2014-06-30 | 89 | $418.4M | 19 | |
| 2014-03-31 | 85 | $400.7M | 15 | |
| 2013-12-31 | 91 | $376.4M | 21 | |
| 2013-09-30 | 88 | $345.0M | 23 | |
| 2013-06-30 | 79 | $336.6M | 0 |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-12 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-01 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2023-02-03 | Amendment | View on EDGAR |
| 2022-09-30 | 2022-10-20 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-10 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-09 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-10-25 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-03 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-03 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-06 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-05 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-06 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-04 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-05 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-06 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-09 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-05 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-02 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-06 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-14 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-01-31 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-02 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-10 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-10 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-09 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-11 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-06 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-11 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-16 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-06 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-13 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-12 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-03 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-07-29 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-13 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-10 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-12 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-07 | 13F-HR | View on EDGAR |
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