Institutional Manager · CIK 0001314377
Kidder Stephen W
BOSTON, MA · File #028-11134
Latest AUM
$354.7M
Positions
320
Top-10 Concentration
37.4%
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 |
|---|---|---|---|---|---|
| ADD | MICROSOFT | MSFT | +890 | +$430,422 | -$12,015 |
| NEW | GRAPHITE ONE INC COM | 38871F953 | +225,000 | +$326,096 | $0 |
| REDUCE | SPDR S&P 500 ETF | SPY | -400 | -$272,768 | +$18,888 |
| EXITED | PAYCHEX | 704326107 | -2,040 | -$258,590 | $0 |
| NEW | BRISTOL-MYERS SQUIBB | CELG-RI | +4,100 | +$221,154 | $0 |
| EXITED | PTC INC | 69370C100 | -1,000 | -$203,020 | $0 |
| ADD | NESTLE SA ADR | 641069406 | +1,500 | +$148,170 | +$1,402 |
| NEW | META PLATFORMS INC | META | +111 | +$73,270 | $0 |
| REDUCE | ALPHABET INC CL C | GOOG | -125 | -$39,226 | +$205,486 |
| REDUCE | MERCK | MRK | -246 | -$25,894 | +$63,265 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025320 pos · $354.7M
- 13F HOLDINGS REPORTQ/E Sep 2025331 pos · $348.9M
- 13F HOLDINGS REPORTQ/E Jun 2025337 pos · $332.6M
- 13F HOLDINGS REPORTQ/E Mar 2025312 pos · $320.8M
- 13F HOLDINGS REPORTQ/E Dec 2024264 pos · $332.3M
- 13F HOLDINGS REPORTQ/E Sep 2024271 pos · $338.5M
- 13F HOLDINGS REPORTQ/E Jun 2024274 pos · $320.0M
- 13F HOLDINGS REPORTQ/E Mar 2024277 pos · $313.3M
- 13F HOLDINGS REPORTQ/E Dec 2023318 pos · $288.3M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | APPLE | AAPL | 87,116 | $23.7M | 10.58% |
| 2 | ALPHABET INC CL A | GOOG | 29,000 | $9.1M | 4.05% |
| 3 | ALPHABET INC CL A | GOOG | 28,475 | $8.9M | 3.98% |
| 4 | APPLE | AAPL | 27,531 | $7.5M | 3.34% |
| 5 | MICROSOFT | MSFT | 13,480 | $6.5M | 2.91% |
| 6 | NVIDIA CORP | NVDA | 34,362 | $6.4M | 2.86% |
| 7 | JOHNSON AND JOHNSON | JNJ | 27,540 | $5.7M | 2.55% |
| 8 | ANALOG DEVICES | ADI | 19,620 | $5.3M | 2.38% |
| 9 | MASTERCARD | MA | 9,282 | $5.3M | 2.37% |
| 10 | RTX CORPORATION | RTX | 28,805 | $5.3M | 2.36% |
| 11 | AMAZON.COM | AMZN | 22,375 | $5.2M | 2.31% |
| 12 | MICROSOFT | MSFT | 10,506 | $5.1M | 2.27% |
| 13 | AMAZON.COM | AMZN | 21,633 | $5.0M | 2.23% |
| 14 | TJX COS | 872540109 | 31,780 | $4.9M | 2.18% |
| 15 | ADVANCED MICRO DEVICES | AMD | 22,522 | $4.8M | 2.15% |
| 16 | MASTERCARD | MA | 8,369 | $4.8M | 2.13% |
| 17 | ALPHABET INC CL A | GOOG | 14,980 | $4.7M | 2.09% |
| 18 | NVIDIA CORP | NVDA | 23,070 | $4.3M | 1.92% |
| 19 | ABBOTT LABS | ABLZF | 33,760 | $4.2M | 1.89% |
| 20 | APPLE | AAPL | 15,297 | $4.2M | 1.86% |