Institutional Manager · CIK 0001085163
SIGMA INVESTMENT COUNSELORS INC
NORTHVILLE, MI · File #028-04089
Latest AUM
$1.97B
Positions
202
Top-10 Concentration
57.9%
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 | 464287200 | -53,186 | -$36.4M | +$10.3M |
| EXITED | ISHARES TR | 46434VBD1 | -834,570 | -$21.0M | $0 |
| NEW | INVESCO EXCHANGE TRADED FD T | IVZ | +108,855 | +$20.9M | $0 |
| ADD | VANGUARD TAX-MANAGED FDS | 921943858 | +317,870 | +$19.9M | +$4.9M |
| ADD | ISHARES TR | 46438G653 | +632,678 | +$16.7M | -$2,121 |
| ADD | VANGUARD INTL EQUITY INDEX F | 922042858 | +110,563 | +$5.9M | -$293,602 |
| ADD | ISHARES TR | 46436E130 | +119,405 | +$3.1M | -$105,025 |
| ADD | SERVICENOW INC | NOW | +15,593 | +$2.4M | -$3.5M |
| ADD | INVESCO QQQ TR | IVZ | +3,794 | +$2.3M | +$372,164 |
| NEW | COPART INC | CPRT | +59,503 | +$2.3M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025202 pos · $1.97B
- 13F HOLDINGS REPORTQ/E Sep 2025198 pos · $1.93B
- 13F HOLDINGS REPORTQ/E Jun 2025196 pos · $1.82B
- 13F HOLDINGS REPORTQ/E Mar 2025187 pos · $1.64B
- 13F HOLDINGS REPORTQ/E Dec 2024197 pos · $1.70B
- 13F HOLDINGS REPORTQ/E Sep 2024199 pos · $1.71B
- 13F HOLDINGS REPORTQ/E Jun 2024191 pos · $1.60B
- 13F HOLDINGS REPORTQ/E Mar 2024194 pos · $1.55B
- 13F HOLDINGS REPORTQ/E Dec 2023193 pos · $1.32B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | ISHARES TR | 464287200 | 602,552 | $412.7M | 24.02% |
| 2 | VANGUARD TAX-MANAGED FDS | 921943858 | 2,221,205 | $138.8M | 8.07% |
| 3 | ISHARES TR | 464287507 | 2,035,302 | $134.3M | 7.82% |
| 4 | ISHARES TR | 464287804 | 576,056 | $69.2M | 4.03% |
| 5 | VANGUARD INTL EQUITY INDEX F | 922042858 | 809,639 | $43.5M | 2.53% |
| 6 | SPDR SERIES TRUST | 78468R408 | 1,632,921 | $41.3M | 2.41% |
| 7 | ISHARES TR | 46429B747 | 400,463 | $41.0M | 2.39% |
| 8 | ISHARES TR | 464287622 | 108,548 | $40.5M | 2.36% |
| 9 | ISHARES TR | 46436E486 | 1,753,685 | $37.1M | 2.16% |
| 10 | ISHARES TR | 46436E312 | 1,446,565 | $36.9M | 2.15% |
| 11 | VANGUARD INDEX FDS | 922908744 | 192,923 | $36.8M | 2.14% |
| 12 | ISHARES TR | 46436E726 | 1,624,318 | $35.8M | 2.09% |
| 13 | ISHARES TR | 46436E205 | 1,514,732 | $35.5M | 2.06% |
| 14 | ISHARES TR | 46436E130 | 1,286,574 | $33.6M | 1.96% |
| 15 | APPLE INC | AAPL | 117,865 | $32.0M | 1.86% |
| 16 | ISHARES TR | 46435U515 | 1,249,003 | $31.8M | 1.85% |
| 17 | ISHARES TR | 46435UAA9 | 1,277,191 | $31.0M | 1.80% |
| 18 | NVIDIA CORPORATION | NVDA | 160,833 | $30.0M | 1.75% |
| 19 | ISHARES TR | 46435GAA0 | 1,204,934 | $29.2M | 1.70% |
| 20 | ISHARES TR | 464287499 | 266,954 | $25.7M | 1.50% |